4300 lines
149 KiB
C
4300 lines
149 KiB
C
/*
|
|
* H263/MPEG4 backend for ffmpeg encoder and decoder
|
|
* Copyright (c) 2000,2001 Fabrice Bellard.
|
|
* H263+ support.
|
|
* Copyright (c) 2001 Juan J. Sierralta P.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* ac prediction encoding, b-frame support, error resilience, optimizations,
|
|
* qpel decoding, gmc decoding, interlaced decoding,
|
|
* by Michael Niedermayer <michaelni@gmx.at>
|
|
*/
|
|
|
|
//#define DEBUG
|
|
#include "common.h"
|
|
#include "dsputil.h"
|
|
#include "avcodec.h"
|
|
#include "mpegvideo.h"
|
|
#include "h263data.h"
|
|
#include "mpeg4data.h"
|
|
|
|
//rounded divison & shift
|
|
#define RSHIFT(a,b) ((a) > 0 ? ((a) + (1<<((b)-1)))>>(b) : ((a) + (1<<((b)-1))-1)>>(b))
|
|
|
|
#define PRINT_MB_TYPE(a) {}
|
|
//#define PRINT_MB_TYPE(a) printf(a)
|
|
|
|
#define INTRA_MCBPC_VLC_BITS 6
|
|
#define INTER_MCBPC_VLC_BITS 6
|
|
#define CBPY_VLC_BITS 6
|
|
#define MV_VLC_BITS 9
|
|
#define DC_VLC_BITS 9
|
|
#define SPRITE_TRAJ_VLC_BITS 6
|
|
#define MB_TYPE_B_VLC_BITS 4
|
|
#define TEX_VLC_BITS 9
|
|
|
|
static void h263_encode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n);
|
|
static void h263_encode_motion(MpegEncContext * s, int val, int fcode);
|
|
static void h263p_encode_umotion(MpegEncContext * s, int val);
|
|
static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n, int dc, UINT8 *scan_table,
|
|
PutBitContext *dc_pb, PutBitContext *ac_pb);
|
|
static int h263_decode_motion(MpegEncContext * s, int pred, int fcode);
|
|
static int h263p_decode_umotion(MpegEncContext * s, int pred);
|
|
static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n, int coded);
|
|
static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
|
|
static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n, int coded, int intra);
|
|
static int h263_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr);
|
|
static void mpeg4_inv_pred_ac(MpegEncContext * s, INT16 *block, int n,
|
|
int dir);
|
|
static void mpeg4_decode_sprite_trajectory(MpegEncContext * s);
|
|
|
|
extern UINT32 inverse[256];
|
|
|
|
static UINT16 mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
|
|
static UINT8 fcode_tab[MAX_MV*2+1];
|
|
static UINT8 umv_fcode_tab[MAX_MV*2+1];
|
|
|
|
static UINT16 uni_DCtab_lum [512][2];
|
|
static UINT16 uni_DCtab_chrom[512][2];
|
|
static UINT32 uni_mpeg4_intra_rl_bits[64*64*2*2];
|
|
static UINT8 uni_mpeg4_intra_rl_len [64*64*2*2];
|
|
static UINT32 uni_mpeg4_inter_rl_bits[64*64*2*2];
|
|
static UINT8 uni_mpeg4_inter_rl_len [64*64*2*2];
|
|
#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
|
|
//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
|
|
|
|
/* mpeg4
|
|
inter
|
|
max level: 24/6
|
|
max run: 53/63
|
|
|
|
intra
|
|
max level: 53/16
|
|
max run: 29/41
|
|
*/
|
|
|
|
int h263_get_picture_format(int width, int height)
|
|
{
|
|
int format;
|
|
|
|
if (width == 128 && height == 96)
|
|
format = 1;
|
|
else if (width == 176 && height == 144)
|
|
format = 2;
|
|
else if (width == 352 && height == 288)
|
|
format = 3;
|
|
else if (width == 704 && height == 576)
|
|
format = 4;
|
|
else if (width == 1408 && height == 1152)
|
|
format = 5;
|
|
else
|
|
format = 7;
|
|
return format;
|
|
}
|
|
|
|
void h263_encode_picture_header(MpegEncContext * s, int picture_number)
|
|
{
|
|
int format;
|
|
|
|
align_put_bits(&s->pb);
|
|
|
|
/* Update the pointer to last GOB */
|
|
s->ptr_lastgob = pbBufPtr(&s->pb);
|
|
s->gob_number = 0;
|
|
|
|
put_bits(&s->pb, 22, 0x20); /* PSC */
|
|
put_bits(&s->pb, 8, (((INT64)s->picture_number * 30 * FRAME_RATE_BASE) /
|
|
s->frame_rate) & 0xff);
|
|
|
|
put_bits(&s->pb, 1, 1); /* marker */
|
|
put_bits(&s->pb, 1, 0); /* h263 id */
|
|
put_bits(&s->pb, 1, 0); /* split screen off */
|
|
put_bits(&s->pb, 1, 0); /* camera off */
|
|
put_bits(&s->pb, 1, 0); /* freeze picture release off */
|
|
|
|
format = h263_get_picture_format(s->width, s->height);
|
|
if (!s->h263_plus) {
|
|
/* H.263v1 */
|
|
put_bits(&s->pb, 3, format);
|
|
put_bits(&s->pb, 1, (s->pict_type == P_TYPE));
|
|
/* By now UMV IS DISABLED ON H.263v1, since the restrictions
|
|
of H.263v1 UMV implies to check the predicted MV after
|
|
calculation of the current MB to see if we're on the limits */
|
|
put_bits(&s->pb, 1, 0); /* unrestricted motion vector: off */
|
|
put_bits(&s->pb, 1, 0); /* SAC: off */
|
|
put_bits(&s->pb, 1, 0); /* advanced prediction mode: off */
|
|
put_bits(&s->pb, 1, 0); /* not PB frame */
|
|
put_bits(&s->pb, 5, s->qscale);
|
|
put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
|
|
} else {
|
|
/* H.263v2 */
|
|
/* H.263 Plus PTYPE */
|
|
put_bits(&s->pb, 3, 7);
|
|
put_bits(&s->pb,3,1); /* Update Full Extended PTYPE */
|
|
if (format == 7)
|
|
put_bits(&s->pb,3,6); /* Custom Source Format */
|
|
else
|
|
put_bits(&s->pb, 3, format);
|
|
|
|
put_bits(&s->pb,1,0); /* Custom PCF: off */
|
|
s->umvplus = (s->pict_type == P_TYPE) && s->unrestricted_mv;
|
|
put_bits(&s->pb, 1, s->umvplus); /* Unrestricted Motion Vector */
|
|
put_bits(&s->pb,1,0); /* SAC: off */
|
|
put_bits(&s->pb,1,0); /* Advanced Prediction Mode: off */
|
|
put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */
|
|
put_bits(&s->pb,1,0); /* Deblocking Filter: off */
|
|
put_bits(&s->pb,1,0); /* Slice Structured: off */
|
|
put_bits(&s->pb,1,0); /* Reference Picture Selection: off */
|
|
put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */
|
|
put_bits(&s->pb,1,0); /* Alternative Inter VLC: off */
|
|
put_bits(&s->pb,1,0); /* Modified Quantization: off */
|
|
put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
|
|
put_bits(&s->pb,3,0); /* Reserved */
|
|
|
|
put_bits(&s->pb, 3, s->pict_type == P_TYPE);
|
|
|
|
put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */
|
|
put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */
|
|
if (s->pict_type == I_TYPE)
|
|
s->no_rounding = 0;
|
|
else
|
|
s->no_rounding ^= 1;
|
|
put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */
|
|
put_bits(&s->pb,2,0); /* Reserved */
|
|
put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
|
|
|
|
/* This should be here if PLUSPTYPE */
|
|
put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
|
|
|
|
if (format == 7) {
|
|
/* Custom Picture Format (CPFMT) */
|
|
|
|
if (s->aspect_ratio_info)
|
|
put_bits(&s->pb,4,s->aspect_ratio_info);
|
|
else
|
|
put_bits(&s->pb,4,2); /* Aspect ratio: CIF 12:11 (4:3) picture */
|
|
put_bits(&s->pb,9,(s->width >> 2) - 1);
|
|
put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
|
|
put_bits(&s->pb,9,(s->height >> 2));
|
|
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
|
|
{
|
|
put_bits(&s->pb, 8, s->aspected_width);
|
|
put_bits(&s->pb, 8, s->aspected_height);
|
|
}
|
|
}
|
|
|
|
/* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
|
|
if (s->umvplus)
|
|
put_bits(&s->pb,1,1); /* Limited according tables of Annex D */
|
|
put_bits(&s->pb, 5, s->qscale);
|
|
}
|
|
|
|
put_bits(&s->pb, 1, 0); /* no PEI */
|
|
|
|
if(s->h263_aic){
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= h263_aic_dc_scale_table;
|
|
}else{
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
|
|
}
|
|
}
|
|
|
|
int h263_encode_gob_header(MpegEncContext * s, int mb_line)
|
|
{
|
|
int pdif=0;
|
|
|
|
/* Check to see if we need to put a new GBSC */
|
|
/* for RTP packetization */
|
|
if (s->rtp_mode) {
|
|
pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
|
|
if (pdif >= s->rtp_payload_size) {
|
|
/* Bad luck, packet must be cut before */
|
|
align_put_bits(&s->pb);
|
|
flush_put_bits(&s->pb);
|
|
/* Call the RTP callback to send the last GOB */
|
|
if (s->rtp_callback) {
|
|
pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
|
|
s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
|
|
}
|
|
s->ptr_lastgob = pbBufPtr(&s->pb);
|
|
put_bits(&s->pb, 17, 1); /* GBSC */
|
|
s->gob_number = mb_line / s->gob_index;
|
|
put_bits(&s->pb, 5, s->gob_number); /* GN */
|
|
put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */
|
|
put_bits(&s->pb, 5, s->qscale); /* GQUANT */
|
|
//fprintf(stderr,"\nGOB: %2d size: %d", s->gob_number - 1, pdif);
|
|
return pdif;
|
|
} else if (pdif + s->mb_line_avgsize >= s->rtp_payload_size) {
|
|
/* Cut the packet before we can't */
|
|
align_put_bits(&s->pb);
|
|
flush_put_bits(&s->pb);
|
|
/* Call the RTP callback to send the last GOB */
|
|
if (s->rtp_callback) {
|
|
pdif = pbBufPtr(&s->pb) - s->ptr_lastgob;
|
|
s->rtp_callback(s->ptr_lastgob, pdif, s->gob_number);
|
|
}
|
|
s->ptr_lastgob = pbBufPtr(&s->pb);
|
|
put_bits(&s->pb, 17, 1); /* GBSC */
|
|
s->gob_number = mb_line / s->gob_index;
|
|
put_bits(&s->pb, 5, s->gob_number); /* GN */
|
|
put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */
|
|
put_bits(&s->pb, 5, s->qscale); /* GQUANT */
|
|
//fprintf(stderr,"\nGOB: %2d size: %d", s->gob_number - 1, pdif);
|
|
return pdif;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], int dir[6])
|
|
{
|
|
int score0=0, score1=0;
|
|
int i, n;
|
|
|
|
for(n=0; n<6; n++){
|
|
INT16 *ac_val, *ac_val1;
|
|
|
|
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
|
|
ac_val1= ac_val;
|
|
if(dir[n]){
|
|
ac_val-= s->block_wrap[n]*16;
|
|
for(i=1; i<8; i++){
|
|
const int level= block[n][block_permute_op(i )];
|
|
score0+= ABS(level);
|
|
score1+= ABS(level - ac_val[i+8]);
|
|
ac_val1[i ]= block[n][block_permute_op(i<<3)];
|
|
ac_val1[i+8]= level;
|
|
}
|
|
}else{
|
|
ac_val-= 16;
|
|
for(i=1; i<8; i++){
|
|
const int level= block[n][block_permute_op(i<<3)];
|
|
score0+= ABS(level);
|
|
score1+= ABS(level - ac_val[i]);
|
|
ac_val1[i ]= level;
|
|
ac_val1[i+8]= block[n][block_permute_op(i )];
|
|
}
|
|
}
|
|
}
|
|
|
|
return score0 > score1 ? 1 : 0;
|
|
}
|
|
|
|
void mpeg4_encode_mb(MpegEncContext * s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y)
|
|
{
|
|
int cbpc, cbpy, i, pred_x, pred_y;
|
|
int bits;
|
|
PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
|
|
PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=B_TYPE ? &s->tex_pb : &s->pb;
|
|
PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=I_TYPE ? &s->pb2 : &s->pb;
|
|
const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
|
|
|
|
// printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
|
|
if (!s->mb_intra) {
|
|
/* compute cbp */
|
|
int cbp = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
|
|
if(s->pict_type==B_TYPE){
|
|
static const int mb_type_table[8]= {-1, 2, 3, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */
|
|
int mb_type= mb_type_table[s->mv_dir];
|
|
|
|
if(s->mb_x==0){
|
|
s->last_mv[0][0][0]=
|
|
s->last_mv[0][0][1]=
|
|
s->last_mv[1][0][0]=
|
|
s->last_mv[1][0][1]= 0;
|
|
}
|
|
|
|
/* nothing to do if this MB was skiped in the next P Frame */
|
|
if(s->mbskip_table[s->mb_y * s->mb_width + s->mb_x]){
|
|
s->skip_count++;
|
|
s->mv[0][0][0]=
|
|
s->mv[0][0][1]=
|
|
s->mv[1][0][0]=
|
|
s->mv[1][0][1]= 0;
|
|
s->mv_dir= MV_DIR_FORWARD; //doesnt matter
|
|
return;
|
|
}
|
|
|
|
if ((cbp | motion_x | motion_y | mb_type) ==0) {
|
|
/* direct MB with MV={0,0} */
|
|
put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
|
|
|
|
if(interleaved_stats){
|
|
s->misc_bits++;
|
|
s->last_bits++;
|
|
}
|
|
s->skip_count++;
|
|
return;
|
|
}
|
|
put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
|
|
put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge
|
|
put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we dont need it :)
|
|
if(cbp) put_bits(&s->pb, 6, cbp);
|
|
|
|
if(cbp && mb_type)
|
|
put_bits(&s->pb, 1, 0); /* no q-scale change */
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->misc_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
switch(mb_type)
|
|
{
|
|
case 0: /* direct */
|
|
h263_encode_motion(s, motion_x, 1);
|
|
h263_encode_motion(s, motion_y, 1);
|
|
s->b_count++;
|
|
s->f_count++;
|
|
break;
|
|
case 1: /* bidir */
|
|
h263_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
|
|
h263_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
|
|
h263_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
|
|
h263_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
|
|
s->last_mv[0][0][0]= s->mv[0][0][0];
|
|
s->last_mv[0][0][1]= s->mv[0][0][1];
|
|
s->last_mv[1][0][0]= s->mv[1][0][0];
|
|
s->last_mv[1][0][1]= s->mv[1][0][1];
|
|
s->b_count++;
|
|
s->f_count++;
|
|
break;
|
|
case 2: /* backward */
|
|
h263_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
|
|
h263_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
|
|
s->last_mv[1][0][0]= motion_x;
|
|
s->last_mv[1][0][1]= motion_y;
|
|
s->b_count++;
|
|
break;
|
|
case 3: /* forward */
|
|
h263_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
|
|
h263_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
|
|
s->last_mv[0][0][0]= motion_x;
|
|
s->last_mv[0][0][1]= motion_y;
|
|
s->f_count++;
|
|
break;
|
|
default:
|
|
printf("unknown mb type\n");
|
|
return;
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->mv_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
/* encode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
mpeg4_encode_block(s, block[i], i, 0, zigzag_direct, NULL, &s->pb);
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->p_tex_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
}else{ /* s->pict_type==B_TYPE */
|
|
if ((cbp | motion_x | motion_y) == 0 && s->mv_type==MV_TYPE_16X16) {
|
|
/* check if the B frames can skip it too, as we must skip it if we skip here
|
|
why didnt they just compress the skip-mb bits instead of reusing them ?! */
|
|
if(s->max_b_frames>0){
|
|
int i;
|
|
int x,y, offset;
|
|
uint8_t *p_pic;
|
|
|
|
x= s->mb_x*16;
|
|
y= s->mb_y*16;
|
|
if(x+16 > s->width) x= s->width-16;
|
|
if(y+16 > s->height) y= s->height-16;
|
|
|
|
offset= x + y*s->linesize;
|
|
p_pic= s->new_picture[0] + offset;
|
|
|
|
s->mb_skiped=1;
|
|
for(i=0; i<s->max_b_frames; i++){
|
|
uint8_t *b_pic;
|
|
int diff;
|
|
|
|
if(s->coded_order[i+1].pict_type!=B_TYPE) break;
|
|
|
|
b_pic= s->coded_order[i+1].picture[0] + offset;
|
|
diff= pix_abs16x16(p_pic, b_pic, s->linesize);
|
|
if(diff>s->qscale*70){ //FIXME check that 70 is optimal
|
|
s->mb_skiped=0;
|
|
break;
|
|
}
|
|
}
|
|
}else
|
|
s->mb_skiped=1;
|
|
|
|
if(s->mb_skiped==1){
|
|
/* skip macroblock */
|
|
put_bits(&s->pb, 1, 1);
|
|
|
|
if(interleaved_stats){
|
|
s->misc_bits++;
|
|
s->last_bits++;
|
|
}
|
|
s->skip_count++;
|
|
return;
|
|
}
|
|
}
|
|
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
if(s->mv_type==MV_TYPE_16X16){
|
|
cbpc = cbp & 3;
|
|
put_bits(&s->pb,
|
|
inter_MCBPC_bits[cbpc],
|
|
inter_MCBPC_code[cbpc]);
|
|
cbpy = cbp >> 2;
|
|
cbpy ^= 0xf;
|
|
put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->misc_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
/* motion vectors: 16x16 mode */
|
|
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
|
|
|
h263_encode_motion(s, motion_x - pred_x, s->f_code);
|
|
h263_encode_motion(s, motion_y - pred_y, s->f_code);
|
|
}else{
|
|
cbpc = (cbp & 3)+16;
|
|
put_bits(&s->pb,
|
|
inter_MCBPC_bits[cbpc],
|
|
inter_MCBPC_code[cbpc]);
|
|
cbpy = cbp >> 2;
|
|
cbpy ^= 0xf;
|
|
put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->misc_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
for(i=0; i<4; i++){
|
|
/* motion vectors: 8x8 mode*/
|
|
h263_pred_motion(s, i, &pred_x, &pred_y);
|
|
|
|
h263_encode_motion(s, s->motion_val[ s->block_index[i] ][0] - pred_x, s->f_code);
|
|
h263_encode_motion(s, s->motion_val[ s->block_index[i] ][1] - pred_y, s->f_code);
|
|
}
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->mv_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
/* encode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
mpeg4_encode_block(s, block[i], i, 0, zigzag_direct, NULL, tex_pb);
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->p_tex_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
s->f_count++;
|
|
}
|
|
} else {
|
|
int cbp;
|
|
int dc_diff[6]; //dc values with the dc prediction subtracted
|
|
int dir[6]; //prediction direction
|
|
int zigzag_last_index[6];
|
|
UINT8 *scan_table[6];
|
|
|
|
for(i=0; i<6; i++){
|
|
const int level= block[i][0];
|
|
UINT16 *dc_ptr;
|
|
|
|
dc_diff[i]= level - ff_mpeg4_pred_dc(s, i, &dc_ptr, &dir[i]);
|
|
if (i < 4) {
|
|
*dc_ptr = level * s->y_dc_scale;
|
|
} else {
|
|
*dc_ptr = level * s->c_dc_scale;
|
|
}
|
|
}
|
|
|
|
s->ac_pred= decide_ac_pred(s, block, dir);
|
|
|
|
if(s->ac_pred){
|
|
for(i=0; i<6; i++){
|
|
UINT8 *st;
|
|
int last_index;
|
|
|
|
mpeg4_inv_pred_ac(s, block[i], i, dir[i]);
|
|
if (dir[i]==0) st = ff_alternate_vertical_scan; /* left */
|
|
else st = ff_alternate_horizontal_scan; /* top */
|
|
|
|
for(last_index=63; last_index>=0; last_index--) //FIXME optimize
|
|
if(block[i][st[last_index]]) break;
|
|
zigzag_last_index[i]= s->block_last_index[i];
|
|
s->block_last_index[i]= last_index;
|
|
scan_table[i]= st;
|
|
}
|
|
}else{
|
|
for(i=0; i<6; i++)
|
|
scan_table[i]= zigzag_direct;
|
|
}
|
|
|
|
/* compute cbp */
|
|
cbp = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 1)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
|
|
cbpc = cbp & 3;
|
|
if (s->pict_type == I_TYPE) {
|
|
put_bits(&s->pb,
|
|
intra_MCBPC_bits[cbpc],
|
|
intra_MCBPC_code[cbpc]);
|
|
} else {
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
put_bits(&s->pb,
|
|
inter_MCBPC_bits[cbpc + 4],
|
|
inter_MCBPC_code[cbpc + 4]);
|
|
}
|
|
put_bits(pb2, 1, s->ac_pred);
|
|
cbpy = cbp >> 2;
|
|
put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->misc_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
|
|
/* encode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
mpeg4_encode_block(s, block[i], i, dc_diff[i], scan_table[i], dc_pb, tex_pb);
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
bits= get_bit_count(&s->pb);
|
|
s->i_tex_bits+= bits - s->last_bits;
|
|
s->last_bits=bits;
|
|
}
|
|
s->i_count++;
|
|
|
|
/* restore ac coeffs & last_index stuff if we messed them up with the prediction */
|
|
if(s->ac_pred){
|
|
for(i=0; i<6; i++){
|
|
int j;
|
|
INT16 *ac_val;
|
|
|
|
ac_val = s->ac_val[0][0] + s->block_index[i] * 16;
|
|
|
|
if(dir[i]){
|
|
for(j=1; j<8; j++)
|
|
block[i][block_permute_op(j )]= ac_val[j+8];
|
|
}else{
|
|
for(j=1; j<8; j++)
|
|
block[i][block_permute_op(j<<3)]= ac_val[j ];
|
|
}
|
|
s->block_last_index[i]= zigzag_last_index[i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void h263_encode_mb(MpegEncContext * s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y)
|
|
{
|
|
int cbpc, cbpy, i, cbp, pred_x, pred_y;
|
|
INT16 pred_dc;
|
|
INT16 rec_intradc[6];
|
|
UINT16 *dc_ptr[6];
|
|
|
|
//printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
|
|
if (!s->mb_intra) {
|
|
/* compute cbp */
|
|
cbp = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
if ((cbp | motion_x | motion_y) == 0) {
|
|
/* skip macroblock */
|
|
put_bits(&s->pb, 1, 1);
|
|
return;
|
|
}
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
cbpc = cbp & 3;
|
|
put_bits(&s->pb,
|
|
inter_MCBPC_bits[cbpc],
|
|
inter_MCBPC_code[cbpc]);
|
|
cbpy = cbp >> 2;
|
|
cbpy ^= 0xf;
|
|
put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
|
|
|
|
/* motion vectors: 16x16 mode only now */
|
|
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
|
|
|
if (!s->umvplus) {
|
|
h263_encode_motion(s, motion_x - pred_x, s->f_code);
|
|
h263_encode_motion(s, motion_y - pred_y, s->f_code);
|
|
}
|
|
else {
|
|
h263p_encode_umotion(s, motion_x - pred_x);
|
|
h263p_encode_umotion(s, motion_y - pred_y);
|
|
if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1))
|
|
/* To prevent Start Code emulation */
|
|
put_bits(&s->pb,1,1);
|
|
}
|
|
} else {
|
|
int li = s->h263_aic ? 0 : 1;
|
|
|
|
cbp = 0;
|
|
for(i=0; i<6; i++) {
|
|
/* Predict DC */
|
|
if (s->h263_aic && s->mb_intra) {
|
|
INT16 level = block[i][0];
|
|
|
|
pred_dc = h263_pred_dc(s, i, &dc_ptr[i]);
|
|
level -= pred_dc;
|
|
/* Quant */
|
|
if (level < 0)
|
|
level = (level + (s->qscale >> 1))/(s->y_dc_scale);
|
|
else
|
|
level = (level - (s->qscale >> 1))/(s->y_dc_scale);
|
|
|
|
/* AIC can change CBP */
|
|
if (level == 0 && s->block_last_index[i] == 0)
|
|
s->block_last_index[i] = -1;
|
|
else if (level < -127)
|
|
level = -127;
|
|
else if (level > 127)
|
|
level = 127;
|
|
|
|
block[i][0] = level;
|
|
/* Reconstruction */
|
|
rec_intradc[i] = (s->y_dc_scale*level) + pred_dc;
|
|
/* Oddify */
|
|
rec_intradc[i] |= 1;
|
|
//if ((rec_intradc[i] % 2) == 0)
|
|
// rec_intradc[i]++;
|
|
/* Clipping */
|
|
if (rec_intradc[i] < 0)
|
|
rec_intradc[i] = 0;
|
|
else if (rec_intradc[i] > 2047)
|
|
rec_intradc[i] = 2047;
|
|
|
|
/* Update AC/DC tables */
|
|
*dc_ptr[i] = rec_intradc[i];
|
|
}
|
|
/* compute cbp */
|
|
if (s->block_last_index[i] >= li)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
|
|
cbpc = cbp & 3;
|
|
if (s->pict_type == I_TYPE) {
|
|
put_bits(&s->pb,
|
|
intra_MCBPC_bits[cbpc],
|
|
intra_MCBPC_code[cbpc]);
|
|
} else {
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
put_bits(&s->pb,
|
|
inter_MCBPC_bits[cbpc + 4],
|
|
inter_MCBPC_code[cbpc + 4]);
|
|
}
|
|
if (s->h263_aic) {
|
|
/* XXX: currently, we do not try to use ac prediction */
|
|
put_bits(&s->pb, 1, 0); /* no AC prediction */
|
|
}
|
|
cbpy = cbp >> 2;
|
|
put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]);
|
|
}
|
|
|
|
for(i=0; i<6; i++) {
|
|
/* encode each block */
|
|
h263_encode_block(s, block[i], i);
|
|
|
|
/* Update INTRADC for decoding */
|
|
if (s->h263_aic && s->mb_intra) {
|
|
block[i][0] = rec_intradc[i];
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
static int h263_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr)
|
|
{
|
|
int x, y, wrap, a, c, pred_dc, scale;
|
|
INT16 *dc_val, *ac_val;
|
|
|
|
/* find prediction */
|
|
if (n < 4) {
|
|
x = 2 * s->mb_x + 1 + (n & 1);
|
|
y = 2 * s->mb_y + 1 + ((n & 2) >> 1);
|
|
wrap = s->mb_width * 2 + 2;
|
|
dc_val = s->dc_val[0];
|
|
ac_val = s->ac_val[0][0];
|
|
scale = s->y_dc_scale;
|
|
} else {
|
|
x = s->mb_x + 1;
|
|
y = s->mb_y + 1;
|
|
wrap = s->mb_width + 2;
|
|
dc_val = s->dc_val[n - 4 + 1];
|
|
ac_val = s->ac_val[n - 4 + 1][0];
|
|
scale = s->c_dc_scale;
|
|
}
|
|
/* B C
|
|
* A X
|
|
*/
|
|
a = dc_val[(x - 1) + (y) * wrap];
|
|
c = dc_val[(x) + (y - 1) * wrap];
|
|
|
|
/* No prediction outside GOB boundary */
|
|
if (s->first_slice_line && ((n < 2) || (n > 3)))
|
|
c = 1024;
|
|
pred_dc = 1024;
|
|
/* just DC prediction */
|
|
if (a != 1024 && c != 1024)
|
|
pred_dc = (a + c) >> 1;
|
|
else if (a != 1024)
|
|
pred_dc = a;
|
|
else
|
|
pred_dc = c;
|
|
|
|
/* we assume pred is positive */
|
|
//pred_dc = (pred_dc + (scale >> 1)) / scale;
|
|
*dc_val_ptr = &dc_val[x + y * wrap];
|
|
return pred_dc;
|
|
}
|
|
|
|
|
|
void h263_pred_acdc(MpegEncContext * s, INT16 *block, int n)
|
|
{
|
|
int x, y, wrap, a, c, pred_dc, scale, i;
|
|
INT16 *dc_val, *ac_val, *ac_val1;
|
|
|
|
/* find prediction */
|
|
if (n < 4) {
|
|
x = 2 * s->mb_x + 1 + (n & 1);
|
|
y = 2 * s->mb_y + 1 + ((n & 2) >> 1);
|
|
wrap = s->mb_width * 2 + 2;
|
|
dc_val = s->dc_val[0];
|
|
ac_val = s->ac_val[0][0];
|
|
scale = s->y_dc_scale;
|
|
} else {
|
|
x = s->mb_x + 1;
|
|
y = s->mb_y + 1;
|
|
wrap = s->mb_width + 2;
|
|
dc_val = s->dc_val[n - 4 + 1];
|
|
ac_val = s->ac_val[n - 4 + 1][0];
|
|
scale = s->c_dc_scale;
|
|
}
|
|
|
|
ac_val += ((y) * wrap + (x)) * 16;
|
|
ac_val1 = ac_val;
|
|
|
|
/* B C
|
|
* A X
|
|
*/
|
|
a = dc_val[(x - 1) + (y) * wrap];
|
|
c = dc_val[(x) + (y - 1) * wrap];
|
|
|
|
/* No prediction outside GOB boundary */
|
|
if (s->first_slice_line && ((n < 2) || (n > 3)))
|
|
c = 1024;
|
|
pred_dc = 1024;
|
|
if (s->ac_pred) {
|
|
if (s->h263_aic_dir) {
|
|
/* left prediction */
|
|
if (a != 1024) {
|
|
ac_val -= 16;
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i*8)] += ac_val[i];
|
|
}
|
|
pred_dc = a;
|
|
}
|
|
} else {
|
|
/* top prediction */
|
|
if (c != 1024) {
|
|
ac_val -= 16 * wrap;
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i)] += ac_val[i + 8];
|
|
}
|
|
pred_dc = c;
|
|
}
|
|
}
|
|
} else {
|
|
/* just DC prediction */
|
|
if (a != 1024 && c != 1024)
|
|
pred_dc = (a + c) >> 1;
|
|
else if (a != 1024)
|
|
pred_dc = a;
|
|
else
|
|
pred_dc = c;
|
|
}
|
|
|
|
/* we assume pred is positive */
|
|
block[0]=block[0]*scale + pred_dc;
|
|
|
|
if (block[0] < 0)
|
|
block[0] = 0;
|
|
else if (!(block[0] & 1))
|
|
block[0]++;
|
|
|
|
/* Update AC/DC tables */
|
|
dc_val[(x) + (y) * wrap] = block[0];
|
|
|
|
/* left copy */
|
|
for(i=1;i<8;i++)
|
|
ac_val1[i] = block[block_permute_op(i * 8)];
|
|
/* top copy */
|
|
for(i=1;i<8;i++)
|
|
ac_val1[8 + i] = block[block_permute_op(i)];
|
|
}
|
|
|
|
INT16 *h263_pred_motion(MpegEncContext * s, int block,
|
|
int *px, int *py)
|
|
{
|
|
int xy, wrap;
|
|
INT16 *A, *B, *C, *mot_val;
|
|
static const int off[4]= {2, 1, 1, -1};
|
|
|
|
wrap = s->block_wrap[0];
|
|
xy = s->block_index[block];
|
|
|
|
mot_val = s->motion_val[xy];
|
|
|
|
A = s->motion_val[xy - 1];
|
|
/* special case for first (slice) line */
|
|
if ((s->mb_y == 0 || s->first_slice_line) && block<3) {
|
|
// we cant just change some MVs to simulate that as we need them for the B frames (and ME)
|
|
// and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
|
|
if(block==0){ //most common case
|
|
if(s->mb_x == s->resync_mb_x){ //rare
|
|
*px= *py = 0;
|
|
}else if(s->mb_x + 1 == s->resync_mb_x){ //rare
|
|
C = s->motion_val[xy + off[block] - wrap];
|
|
if(s->mb_x==0){
|
|
*px = C[0];
|
|
*py = C[1];
|
|
}else{
|
|
*px = mid_pred(A[0], 0, C[0]);
|
|
*py = mid_pred(A[1], 0, C[1]);
|
|
}
|
|
}else{
|
|
*px = A[0];
|
|
*py = A[1];
|
|
}
|
|
}else if(block==1){
|
|
if(s->mb_x + 1 == s->resync_mb_x){ //rare
|
|
C = s->motion_val[xy + off[block] - wrap];
|
|
*px = mid_pred(A[0], 0, C[0]);
|
|
*py = mid_pred(A[1], 0, C[1]);
|
|
}else{
|
|
*px = A[0];
|
|
*py = A[1];
|
|
}
|
|
}else{ /* block==2*/
|
|
B = s->motion_val[xy - wrap];
|
|
C = s->motion_val[xy + off[block] - wrap];
|
|
if(s->mb_x == s->resync_mb_x) //rare
|
|
A[0]=A[1]=0;
|
|
|
|
*px = mid_pred(A[0], B[0], C[0]);
|
|
*py = mid_pred(A[1], B[1], C[1]);
|
|
}
|
|
} else {
|
|
B = s->motion_val[xy - wrap];
|
|
C = s->motion_val[xy + off[block] - wrap];
|
|
*px = mid_pred(A[0], B[0], C[0]);
|
|
*py = mid_pred(A[1], B[1], C[1]);
|
|
}
|
|
return mot_val;
|
|
}
|
|
|
|
static void h263_encode_motion(MpegEncContext * s, int val, int f_code)
|
|
{
|
|
int range, l, m, bit_size, sign, code, bits;
|
|
|
|
if (val == 0) {
|
|
/* zero vector */
|
|
code = 0;
|
|
put_bits(&s->pb, mvtab[code][1], mvtab[code][0]);
|
|
} else {
|
|
bit_size = f_code - 1;
|
|
range = 1 << bit_size;
|
|
/* modulo encoding */
|
|
l = range * 32;
|
|
m = 2 * l;
|
|
if (val < -l) {
|
|
val += m;
|
|
} else if (val >= l) {
|
|
val -= m;
|
|
}
|
|
|
|
if (val >= 0) {
|
|
sign = 0;
|
|
} else {
|
|
val = -val;
|
|
sign = 1;
|
|
}
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
bits = val & (range - 1);
|
|
|
|
put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign);
|
|
if (bit_size > 0) {
|
|
put_bits(&s->pb, bit_size, bits);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Encode MV differences on H.263+ with Unrestricted MV mode */
|
|
static void h263p_encode_umotion(MpegEncContext * s, int val)
|
|
{
|
|
short sval = 0;
|
|
short i = 0;
|
|
short n_bits = 0;
|
|
short temp_val;
|
|
int code = 0;
|
|
int tcode;
|
|
|
|
if ( val == 0)
|
|
put_bits(&s->pb, 1, 1);
|
|
else if (val == 1)
|
|
put_bits(&s->pb, 3, 0);
|
|
else if (val == -1)
|
|
put_bits(&s->pb, 3, 2);
|
|
else {
|
|
|
|
sval = ((val < 0) ? (short)(-val):(short)val);
|
|
temp_val = sval;
|
|
|
|
while (temp_val != 0) {
|
|
temp_val = temp_val >> 1;
|
|
n_bits++;
|
|
}
|
|
|
|
i = n_bits - 1;
|
|
while (i > 0) {
|
|
tcode = (sval & (1 << (i-1))) >> (i-1);
|
|
tcode = (tcode << 1) | 1;
|
|
code = (code << 2) | tcode;
|
|
i--;
|
|
}
|
|
code = ((code << 1) | (val < 0)) << 1;
|
|
put_bits(&s->pb, (2*n_bits)+1, code);
|
|
//printf("\nVal = %d\tCode = %d", sval, code);
|
|
}
|
|
}
|
|
|
|
static void init_mv_penalty_and_fcode(MpegEncContext *s)
|
|
{
|
|
int f_code;
|
|
int mv;
|
|
for(f_code=1; f_code<=MAX_FCODE; f_code++){
|
|
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
|
|
int len;
|
|
|
|
if(mv==0) len= mvtab[0][1];
|
|
else{
|
|
int val, bit_size, range, code;
|
|
|
|
bit_size = s->f_code - 1;
|
|
range = 1 << bit_size;
|
|
|
|
val=mv;
|
|
if (val < 0)
|
|
val = -val;
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
if(code<33){
|
|
len= mvtab[code][1] + 1 + bit_size;
|
|
}else{
|
|
len= mvtab[32][1] + 2 + bit_size;
|
|
}
|
|
}
|
|
|
|
mv_penalty[f_code][mv+MAX_MV]= len;
|
|
}
|
|
}
|
|
|
|
for(f_code=MAX_FCODE; f_code>0; f_code--){
|
|
for(mv=-(16<<f_code); mv<(16<<f_code); mv++){
|
|
fcode_tab[mv+MAX_MV]= f_code;
|
|
}
|
|
}
|
|
|
|
for(mv=0; mv<MAX_MV*2+1; mv++){
|
|
umv_fcode_tab[mv]= 1;
|
|
}
|
|
}
|
|
|
|
static void init_uni_dc_tab(void)
|
|
{
|
|
int level, uni_code, uni_len;
|
|
|
|
for(level=-256; level<256; level++){
|
|
int size, v, l;
|
|
/* find number of bits */
|
|
size = 0;
|
|
v = abs(level);
|
|
while (v) {
|
|
v >>= 1;
|
|
size++;
|
|
}
|
|
|
|
if (level < 0)
|
|
l= (-level) ^ ((1 << size) - 1);
|
|
else
|
|
l= level;
|
|
|
|
/* luminance */
|
|
uni_code= DCtab_lum[size][0];
|
|
uni_len = DCtab_lum[size][1];
|
|
|
|
if (size > 0) {
|
|
uni_code<<=size; uni_code|=l;
|
|
uni_len+=size;
|
|
if (size > 8){
|
|
uni_code<<=1; uni_code|=1;
|
|
uni_len++;
|
|
}
|
|
}
|
|
uni_DCtab_lum[level+256][0]= uni_code;
|
|
uni_DCtab_lum[level+256][1]= uni_len;
|
|
|
|
/* chrominance */
|
|
uni_code= DCtab_chrom[size][0];
|
|
uni_len = DCtab_chrom[size][1];
|
|
|
|
if (size > 0) {
|
|
uni_code<<=size; uni_code|=l;
|
|
uni_len+=size;
|
|
if (size > 8){
|
|
uni_code<<=1; uni_code|=1;
|
|
uni_len++;
|
|
}
|
|
}
|
|
uni_DCtab_chrom[level+256][0]= uni_code;
|
|
uni_DCtab_chrom[level+256][1]= uni_len;
|
|
|
|
}
|
|
}
|
|
|
|
static void init_uni_mpeg4_rl_tab(RLTable *rl, UINT32 *bits_tab, UINT8 *len_tab){
|
|
int slevel, run, last;
|
|
|
|
assert(MAX_LEVEL >= 64);
|
|
assert(MAX_RUN >= 63);
|
|
|
|
for(slevel=-64; slevel<64; slevel++){
|
|
if(slevel==0) continue;
|
|
for(run=0; run<64; run++){
|
|
for(last=0; last<=1; last++){
|
|
const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
|
|
int level= slevel < 0 ? -slevel : slevel;
|
|
int sign= slevel < 0 ? 1 : 0;
|
|
int bits, len, code;
|
|
int level1, run1;
|
|
|
|
len_tab[index]= 100;
|
|
|
|
/* ESC0 */
|
|
code= get_rl_index(rl, last, run, level);
|
|
bits= rl->table_vlc[code][0];
|
|
len= rl->table_vlc[code][1];
|
|
bits=bits*2+sign; len++;
|
|
|
|
if(code!=rl->n && len < len_tab[index]){
|
|
bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
#if 1
|
|
/* ESC1 */
|
|
bits= rl->table_vlc[rl->n][0];
|
|
len= rl->table_vlc[rl->n][1];
|
|
bits=bits*2; len++; //esc1
|
|
level1= level - rl->max_level[last][run];
|
|
if(level1>0){
|
|
code= get_rl_index(rl, last, run, level1);
|
|
bits<<= rl->table_vlc[code][1];
|
|
len += rl->table_vlc[code][1];
|
|
bits += rl->table_vlc[code][0];
|
|
bits=bits*2+sign; len++;
|
|
|
|
if(code!=rl->n && len < len_tab[index]){
|
|
bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
}
|
|
#endif
|
|
#if 1
|
|
/* ESC2 */
|
|
bits= rl->table_vlc[rl->n][0];
|
|
len= rl->table_vlc[rl->n][1];
|
|
bits=bits*4+2; len+=2; //esc2
|
|
run1 = run - rl->max_run[last][level] - 1;
|
|
if(run1>=0){
|
|
code= get_rl_index(rl, last, run1, level);
|
|
bits<<= rl->table_vlc[code][1];
|
|
len += rl->table_vlc[code][1];
|
|
bits += rl->table_vlc[code][0];
|
|
bits=bits*2+sign; len++;
|
|
|
|
if(code!=rl->n && len < len_tab[index]){
|
|
bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
}
|
|
#endif
|
|
/* ESC3 */
|
|
bits= rl->table_vlc[rl->n][0];
|
|
len = rl->table_vlc[rl->n][1];
|
|
bits=bits*4+3; len+=2; //esc3
|
|
bits=bits*2+last; len++;
|
|
bits=bits*64+run; len+=6;
|
|
bits=bits*2+1; len++; //marker
|
|
bits=bits*4096+(slevel&0xfff); len+=12;
|
|
bits=bits*2+1; len++; //marker
|
|
|
|
if(len < len_tab[index]){
|
|
bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void h263_encode_init(MpegEncContext *s)
|
|
{
|
|
static int done = 0;
|
|
|
|
if (!done) {
|
|
done = 1;
|
|
|
|
init_uni_dc_tab();
|
|
|
|
init_rl(&rl_inter);
|
|
init_rl(&rl_intra);
|
|
init_rl(&rl_intra_aic);
|
|
|
|
init_uni_mpeg4_rl_tab(&rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len);
|
|
init_uni_mpeg4_rl_tab(&rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len);
|
|
|
|
init_mv_penalty_and_fcode(s);
|
|
}
|
|
s->mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
|
|
|
|
// use fcodes >1 only for mpeg4 & h263 & h263p FIXME
|
|
switch(s->codec_id){
|
|
case CODEC_ID_MPEG4:
|
|
s->fcode_tab= fcode_tab;
|
|
s->min_qcoeff= -2048;
|
|
s->max_qcoeff= 2047;
|
|
break;
|
|
case CODEC_ID_H263P:
|
|
s->fcode_tab= umv_fcode_tab;
|
|
s->min_qcoeff= -128;
|
|
s->max_qcoeff= 127;
|
|
break;
|
|
//Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
|
|
default: //nothing needed default table allready set in mpegvideo.c
|
|
s->min_qcoeff= -128;
|
|
s->max_qcoeff= 127;
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
|
|
}
|
|
|
|
if(s->mpeg_quant){
|
|
s->intra_quant_bias= 3<<(QUANT_BIAS_SHIFT-3); //(a + x*3/8)/x
|
|
s->inter_quant_bias= 0;
|
|
}else{
|
|
s->intra_quant_bias=0;
|
|
s->inter_quant_bias=-(1<<(QUANT_BIAS_SHIFT-2)); //(a - x/4)/x
|
|
}
|
|
}
|
|
|
|
static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
|
|
{
|
|
int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
|
|
RLTable *rl;
|
|
|
|
rl = &rl_inter;
|
|
if (s->mb_intra && !s->h263_aic) {
|
|
/* DC coef */
|
|
level = block[0];
|
|
/* 255 cannot be represented, so we clamp */
|
|
if (level > 254) {
|
|
level = 254;
|
|
block[0] = 254;
|
|
}
|
|
/* 0 cannot be represented also */
|
|
else if (!level) {
|
|
level = 1;
|
|
block[0] = 1;
|
|
}
|
|
if (level == 128)
|
|
put_bits(&s->pb, 8, 0xff);
|
|
else
|
|
put_bits(&s->pb, 8, level & 0xff);
|
|
i = 1;
|
|
} else {
|
|
i = 0;
|
|
if (s->h263_aic && s->mb_intra)
|
|
rl = &rl_intra_aic;
|
|
}
|
|
|
|
/* AC coefs */
|
|
last_index = s->block_last_index[n];
|
|
last_non_zero = i - 1;
|
|
for (; i <= last_index; i++) {
|
|
j = zigzag_direct[i];
|
|
level = block[j];
|
|
if (level) {
|
|
run = i - last_non_zero - 1;
|
|
last = (i == last_index);
|
|
sign = 0;
|
|
slevel = level;
|
|
if (level < 0) {
|
|
sign = 1;
|
|
level = -level;
|
|
}
|
|
code = get_rl_index(rl, last, run, level);
|
|
put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
|
if (code == rl->n) {
|
|
put_bits(&s->pb, 1, last);
|
|
put_bits(&s->pb, 6, run);
|
|
put_bits(&s->pb, 8, slevel & 0xff);
|
|
} else {
|
|
put_bits(&s->pb, 1, sign);
|
|
}
|
|
last_non_zero = i;
|
|
}
|
|
}
|
|
}
|
|
|
|
/***************************************************/
|
|
|
|
void ff_mpeg4_stuffing(PutBitContext * pbc)
|
|
{
|
|
int length;
|
|
put_bits(pbc, 1, 0);
|
|
length= (-get_bit_count(pbc))&7;
|
|
if(length) put_bits(pbc, length, (1<<length)-1);
|
|
}
|
|
|
|
/* must be called before writing the header */
|
|
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number){
|
|
int time_div, time_mod;
|
|
|
|
if(s->pict_type==I_TYPE){ //we will encode a vol header
|
|
s->time_increment_resolution= s->frame_rate/ff_gcd(s->frame_rate, FRAME_RATE_BASE);
|
|
if(s->time_increment_resolution>=256*256) s->time_increment_resolution= 256*128;
|
|
|
|
s->time_increment_bits = av_log2(s->time_increment_resolution - 1) + 1;
|
|
}
|
|
|
|
if(s->avctx->pts)
|
|
s->time= (s->avctx->pts*s->time_increment_resolution + 500*1000)/(1000*1000);
|
|
else
|
|
s->time= picture_number*(INT64)FRAME_RATE_BASE*s->time_increment_resolution/s->frame_rate;
|
|
time_div= s->time/s->time_increment_resolution;
|
|
time_mod= s->time%s->time_increment_resolution;
|
|
|
|
if(s->pict_type==B_TYPE){
|
|
s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
|
|
}else{
|
|
s->last_time_base= s->time_base;
|
|
s->time_base= time_div;
|
|
s->pp_time= s->time - s->last_non_b_time;
|
|
s->last_non_b_time= s->time;
|
|
}
|
|
}
|
|
|
|
static void mpeg4_encode_vol_header(MpegEncContext * s)
|
|
{
|
|
int vo_ver_id=1; //must be 2 if we want GMC or q-pel
|
|
char buf[255];
|
|
|
|
s->vo_type= s->has_b_frames ? CORE_VO_TYPE : SIMPLE_VO_TYPE;
|
|
|
|
put_bits(&s->pb, 16, 0);
|
|
put_bits(&s->pb, 16, 0x100); /* video obj */
|
|
put_bits(&s->pb, 16, 0);
|
|
put_bits(&s->pb, 16, 0x120); /* video obj layer */
|
|
|
|
put_bits(&s->pb, 1, 0); /* random access vol */
|
|
put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
|
|
put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
|
|
put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
|
|
put_bits(&s->pb, 3, 1); /* is obj layer priority */
|
|
if(s->aspect_ratio_info)
|
|
put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */
|
|
else
|
|
put_bits(&s->pb, 4, 1); /* aspect ratio info= sqare pixel */
|
|
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED)
|
|
{
|
|
put_bits(&s->pb, 8, s->aspected_width);
|
|
put_bits(&s->pb, 8, s->aspected_height);
|
|
}
|
|
|
|
if(s->low_delay){
|
|
put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
|
|
put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
|
|
put_bits(&s->pb, 1, s->low_delay);
|
|
put_bits(&s->pb, 1, 0); /* vbv parameters= no */
|
|
}else{
|
|
put_bits(&s->pb, 1, 0); /* vol control parameters= no */
|
|
}
|
|
|
|
put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
|
|
put_bits(&s->pb, 1, 1); /* marker bit */
|
|
|
|
put_bits(&s->pb, 16, s->time_increment_resolution);
|
|
if (s->time_increment_bits < 1)
|
|
s->time_increment_bits = 1;
|
|
put_bits(&s->pb, 1, 1); /* marker bit */
|
|
put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
|
|
put_bits(&s->pb, 1, 1); /* marker bit */
|
|
put_bits(&s->pb, 13, s->width); /* vol width */
|
|
put_bits(&s->pb, 1, 1); /* marker bit */
|
|
put_bits(&s->pb, 13, s->height); /* vol height */
|
|
put_bits(&s->pb, 1, 1); /* marker bit */
|
|
put_bits(&s->pb, 1, 0); /* interlace */
|
|
put_bits(&s->pb, 1, 1); /* obmc disable */
|
|
if (vo_ver_id == 1) {
|
|
put_bits(&s->pb, 1, s->vol_sprite_usage=0); /* sprite enable */
|
|
}else{ /* vo_ver_id == 2 */
|
|
put_bits(&s->pb, 2, s->vol_sprite_usage=0); /* sprite enable */
|
|
}
|
|
put_bits(&s->pb, 1, 0); /* not 8 bit */
|
|
put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
|
|
if(s->mpeg_quant) put_bits(&s->pb, 2, 0); /* no custom matrixes */
|
|
|
|
if (vo_ver_id != 1)
|
|
put_bits(&s->pb, 1, s->quarter_sample=0);
|
|
put_bits(&s->pb, 1, 1); /* complexity estimation disable */
|
|
s->resync_marker= s->rtp_mode;
|
|
put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */
|
|
put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
|
|
if(s->data_partitioning){
|
|
put_bits(&s->pb, 1, 0); /* no rvlc */
|
|
}
|
|
|
|
if (vo_ver_id != 1){
|
|
put_bits(&s->pb, 1, 0); /* newpred */
|
|
put_bits(&s->pb, 1, 0); /* reduced res vop */
|
|
}
|
|
put_bits(&s->pb, 1, 0); /* scalability */
|
|
|
|
ff_mpeg4_stuffing(&s->pb);
|
|
|
|
/* user data */
|
|
if(!ff_bit_exact){
|
|
put_bits(&s->pb, 16, 0);
|
|
put_bits(&s->pb, 16, 0x1B2); /* user_data */
|
|
sprintf(buf, "FFmpeg%sb%s", FFMPEG_VERSION, LIBAVCODEC_BUILD_STR);
|
|
put_string(&s->pb, buf);
|
|
ff_mpeg4_stuffing(&s->pb);
|
|
}
|
|
}
|
|
|
|
/* write mpeg4 VOP header */
|
|
void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
|
|
{
|
|
int time_incr;
|
|
int time_div, time_mod;
|
|
|
|
if(s->pict_type==I_TYPE){
|
|
s->no_rounding=0;
|
|
if(picture_number==0 || !s->strict_std_compliance)
|
|
mpeg4_encode_vol_header(s);
|
|
}
|
|
|
|
//printf("num:%d rate:%d base:%d\n", s->picture_number, s->frame_rate, FRAME_RATE_BASE);
|
|
|
|
put_bits(&s->pb, 16, 0); /* vop header */
|
|
put_bits(&s->pb, 16, 0x1B6); /* vop header */
|
|
put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
|
|
|
|
time_div= s->time/s->time_increment_resolution;
|
|
time_mod= s->time%s->time_increment_resolution;
|
|
time_incr= time_div - s->last_time_base;
|
|
while(time_incr--)
|
|
put_bits(&s->pb, 1, 1);
|
|
|
|
put_bits(&s->pb, 1, 0);
|
|
|
|
put_bits(&s->pb, 1, 1); /* marker */
|
|
put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
|
|
put_bits(&s->pb, 1, 1); /* marker */
|
|
put_bits(&s->pb, 1, 1); /* vop coded */
|
|
if ( s->pict_type == P_TYPE
|
|
|| (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE)) {
|
|
s->no_rounding ^= 1;
|
|
put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
|
|
}
|
|
put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
|
|
//FIXME sprite stuff
|
|
|
|
put_bits(&s->pb, 5, s->qscale);
|
|
|
|
if (s->pict_type != I_TYPE)
|
|
put_bits(&s->pb, 3, s->f_code); /* fcode_for */
|
|
if (s->pict_type == B_TYPE)
|
|
put_bits(&s->pb, 3, s->b_code); /* fcode_back */
|
|
// printf("****frame %d\n", picture_number);
|
|
|
|
s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support
|
|
s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
|
|
s->h_edge_pos= s->width;
|
|
s->v_edge_pos= s->height;
|
|
}
|
|
|
|
static void h263_dc_scale(MpegEncContext * s)
|
|
{
|
|
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
|
|
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
|
|
}
|
|
|
|
inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr)
|
|
{
|
|
int a, b, c, wrap, pred, scale;
|
|
UINT16 *dc_val;
|
|
int dummy;
|
|
|
|
/* find prediction */
|
|
if (n < 4) {
|
|
scale = s->y_dc_scale;
|
|
} else {
|
|
scale = s->c_dc_scale;
|
|
}
|
|
wrap= s->block_wrap[n];
|
|
dc_val = s->dc_val[0] + s->block_index[n];
|
|
|
|
/* B C
|
|
* A X
|
|
*/
|
|
a = dc_val[ - 1];
|
|
b = dc_val[ - 1 - wrap];
|
|
c = dc_val[ - wrap];
|
|
|
|
if (abs(a - b) < abs(b - c)) {
|
|
pred = c;
|
|
*dir_ptr = 1; /* top */
|
|
} else {
|
|
pred = a;
|
|
*dir_ptr = 0; /* left */
|
|
}
|
|
/* we assume pred is positive */
|
|
#ifdef ARCH_X86
|
|
asm volatile (
|
|
"xorl %%edx, %%edx \n\t"
|
|
"mul %%ecx \n\t"
|
|
: "=d" (pred), "=a"(dummy)
|
|
: "a" (pred + (scale >> 1)), "c" (inverse[scale])
|
|
);
|
|
#else
|
|
pred = (pred + (scale >> 1)) / scale;
|
|
#endif
|
|
|
|
/* prepare address for prediction update */
|
|
*dc_val_ptr = &dc_val[0];
|
|
|
|
return pred;
|
|
}
|
|
|
|
void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n,
|
|
int dir)
|
|
{
|
|
int i;
|
|
INT16 *ac_val, *ac_val1;
|
|
|
|
/* find prediction */
|
|
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
|
|
ac_val1 = ac_val;
|
|
if (s->ac_pred) {
|
|
if (dir == 0) {
|
|
const int xy= s->mb_x-1 + s->mb_y*s->mb_width;
|
|
/* left prediction */
|
|
ac_val -= 16;
|
|
|
|
if(s->mb_x==0 || s->qscale == s->qscale_table[xy] || n==1 || n==3){
|
|
/* same qscale */
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i*8)] += ac_val[i];
|
|
}
|
|
}else{
|
|
/* different qscale, we must rescale */
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i*8)] += ROUNDED_DIV(ac_val[i]*s->qscale_table[xy], s->qscale);
|
|
}
|
|
}
|
|
} else {
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width - s->mb_width;
|
|
/* top prediction */
|
|
ac_val -= 16 * s->block_wrap[n];
|
|
|
|
if(s->mb_y==0 || s->qscale == s->qscale_table[xy] || n==2 || n==3){
|
|
/* same qscale */
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i)] += ac_val[i + 8];
|
|
}
|
|
}else{
|
|
/* different qscale, we must rescale */
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i)] += ROUNDED_DIV(ac_val[i + 8]*s->qscale_table[xy], s->qscale);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* left copy */
|
|
for(i=1;i<8;i++)
|
|
ac_val1[i] = block[block_permute_op(i * 8)];
|
|
|
|
/* top copy */
|
|
for(i=1;i<8;i++)
|
|
ac_val1[8 + i] = block[block_permute_op(i)];
|
|
|
|
}
|
|
|
|
static void mpeg4_inv_pred_ac(MpegEncContext * s, INT16 *block, int n,
|
|
int dir)
|
|
{
|
|
int i;
|
|
INT16 *ac_val;
|
|
|
|
/* find prediction */
|
|
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
|
|
|
|
if (dir == 0) {
|
|
/* left prediction */
|
|
ac_val -= 16;
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i*8)] -= ac_val[i];
|
|
}
|
|
} else {
|
|
/* top prediction */
|
|
ac_val -= 16 * s->block_wrap[n];
|
|
for(i=1;i<8;i++) {
|
|
block[block_permute_op(i)] -= ac_val[i + 8];
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n)
|
|
{
|
|
#if 1
|
|
// if(level<-255 || level>255) printf("dc overflow\n");
|
|
level+=256;
|
|
if (n < 4) {
|
|
/* luminance */
|
|
put_bits(s, uni_DCtab_lum[level][1], uni_DCtab_lum[level][0]);
|
|
} else {
|
|
/* chrominance */
|
|
put_bits(s, uni_DCtab_chrom[level][1], uni_DCtab_chrom[level][0]);
|
|
}
|
|
#else
|
|
int size, v;
|
|
/* find number of bits */
|
|
size = 0;
|
|
v = abs(level);
|
|
while (v) {
|
|
v >>= 1;
|
|
size++;
|
|
}
|
|
|
|
if (n < 4) {
|
|
/* luminance */
|
|
put_bits(&s->pb, DCtab_lum[size][1], DCtab_lum[size][0]);
|
|
} else {
|
|
/* chrominance */
|
|
put_bits(&s->pb, DCtab_chrom[size][1], DCtab_chrom[size][0]);
|
|
}
|
|
|
|
/* encode remaining bits */
|
|
if (size > 0) {
|
|
if (level < 0)
|
|
level = (-level) ^ ((1 << size) - 1);
|
|
put_bits(&s->pb, size, level);
|
|
if (size > 8)
|
|
put_bits(&s->pb, 1, 1);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc,
|
|
UINT8 *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
|
|
{
|
|
int last, i, last_non_zero, sign;
|
|
int code;
|
|
const RLTable *rl;
|
|
UINT32 *bits_tab;
|
|
UINT8 *len_tab;
|
|
const int last_index = s->block_last_index[n];
|
|
|
|
if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away
|
|
/* mpeg4 based DC predictor */
|
|
mpeg4_encode_dc(dc_pb, intra_dc, n);
|
|
if(last_index<1) return;
|
|
i = 1;
|
|
rl = &rl_intra;
|
|
bits_tab= uni_mpeg4_intra_rl_bits;
|
|
len_tab = uni_mpeg4_intra_rl_len;
|
|
} else {
|
|
if(last_index<0) return;
|
|
i = 0;
|
|
rl = &rl_inter;
|
|
bits_tab= uni_mpeg4_inter_rl_bits;
|
|
len_tab = uni_mpeg4_inter_rl_len;
|
|
}
|
|
|
|
/* AC coefs */
|
|
last_non_zero = i - 1;
|
|
#if 1
|
|
for (; i < last_index; i++) {
|
|
int level = block[ scan_table[i] ];
|
|
if (level) {
|
|
int run = i - last_non_zero - 1;
|
|
level+=64;
|
|
if((level&(~127)) == 0){
|
|
const int index= UNI_MPEG4_ENC_INDEX(0, run, level);
|
|
put_bits(ac_pb, len_tab[index], bits_tab[index]);
|
|
}else{ //ESC3
|
|
put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
|
|
}
|
|
last_non_zero = i;
|
|
}
|
|
}
|
|
/*if(i<=last_index)*/{
|
|
int level = block[ scan_table[i] ];
|
|
int run = i - last_non_zero - 1;
|
|
level+=64;
|
|
if((level&(~127)) == 0){
|
|
const int index= UNI_MPEG4_ENC_INDEX(1, run, level);
|
|
put_bits(ac_pb, len_tab[index], bits_tab[index]);
|
|
}else{ //ESC3
|
|
put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1);
|
|
}
|
|
}
|
|
#else
|
|
for (; i <= last_index; i++) {
|
|
const int slevel = block[ scan_table[i] ];
|
|
if (slevel) {
|
|
int level;
|
|
int run = i - last_non_zero - 1;
|
|
last = (i == last_index);
|
|
sign = 0;
|
|
level = slevel;
|
|
if (level < 0) {
|
|
sign = 1;
|
|
level = -level;
|
|
}
|
|
code = get_rl_index(rl, last, run, level);
|
|
put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
|
if (code == rl->n) {
|
|
int level1, run1;
|
|
level1 = level - rl->max_level[last][run];
|
|
if (level1 < 1)
|
|
goto esc2;
|
|
code = get_rl_index(rl, last, run, level1);
|
|
if (code == rl->n) {
|
|
esc2:
|
|
put_bits(ac_pb, 1, 1);
|
|
if (level > MAX_LEVEL)
|
|
goto esc3;
|
|
run1 = run - rl->max_run[last][level] - 1;
|
|
if (run1 < 0)
|
|
goto esc3;
|
|
code = get_rl_index(rl, last, run1, level);
|
|
if (code == rl->n) {
|
|
esc3:
|
|
/* third escape */
|
|
put_bits(ac_pb, 1, 1);
|
|
put_bits(ac_pb, 1, last);
|
|
put_bits(ac_pb, 6, run);
|
|
put_bits(ac_pb, 1, 1);
|
|
put_bits(ac_pb, 12, slevel & 0xfff);
|
|
put_bits(ac_pb, 1, 1);
|
|
} else {
|
|
/* second escape */
|
|
put_bits(ac_pb, 1, 0);
|
|
put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
|
put_bits(ac_pb, 1, sign);
|
|
}
|
|
} else {
|
|
/* first escape */
|
|
put_bits(ac_pb, 1, 0);
|
|
put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
|
|
put_bits(ac_pb, 1, sign);
|
|
}
|
|
} else {
|
|
put_bits(ac_pb, 1, sign);
|
|
}
|
|
last_non_zero = i;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
/***********************************************/
|
|
/* decoding */
|
|
|
|
static VLC intra_MCBPC_vlc;
|
|
static VLC inter_MCBPC_vlc;
|
|
static VLC cbpy_vlc;
|
|
static VLC mv_vlc;
|
|
static VLC dc_lum, dc_chrom;
|
|
static VLC sprite_trajectory;
|
|
static VLC mb_type_b_vlc;
|
|
|
|
void init_rl(RLTable *rl)
|
|
{
|
|
INT8 max_level[MAX_RUN+1], max_run[MAX_LEVEL+1];
|
|
UINT8 index_run[MAX_RUN+1];
|
|
int last, run, level, start, end, i;
|
|
|
|
/* compute max_level[], max_run[] and index_run[] */
|
|
for(last=0;last<2;last++) {
|
|
if (last == 0) {
|
|
start = 0;
|
|
end = rl->last;
|
|
} else {
|
|
start = rl->last;
|
|
end = rl->n;
|
|
}
|
|
|
|
memset(max_level, 0, MAX_RUN + 1);
|
|
memset(max_run, 0, MAX_LEVEL + 1);
|
|
memset(index_run, rl->n, MAX_RUN + 1);
|
|
for(i=start;i<end;i++) {
|
|
run = rl->table_run[i];
|
|
level = rl->table_level[i];
|
|
if (index_run[run] == rl->n)
|
|
index_run[run] = i;
|
|
if (level > max_level[run])
|
|
max_level[run] = level;
|
|
if (run > max_run[level])
|
|
max_run[level] = run;
|
|
}
|
|
rl->max_level[last] = av_malloc(MAX_RUN + 1);
|
|
memcpy(rl->max_level[last], max_level, MAX_RUN + 1);
|
|
rl->max_run[last] = av_malloc(MAX_LEVEL + 1);
|
|
memcpy(rl->max_run[last], max_run, MAX_LEVEL + 1);
|
|
rl->index_run[last] = av_malloc(MAX_RUN + 1);
|
|
memcpy(rl->index_run[last], index_run, MAX_RUN + 1);
|
|
}
|
|
}
|
|
|
|
void init_vlc_rl(RLTable *rl)
|
|
{
|
|
int i, q;
|
|
|
|
init_vlc(&rl->vlc, 9, rl->n + 1,
|
|
&rl->table_vlc[0][1], 4, 2,
|
|
&rl->table_vlc[0][0], 4, 2);
|
|
|
|
|
|
for(q=0; q<32; q++){
|
|
int qmul= q*2;
|
|
int qadd= (q-1)|1;
|
|
|
|
if(q==0){
|
|
qmul=1;
|
|
qadd=0;
|
|
}
|
|
|
|
rl->rl_vlc[q]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
|
|
for(i=0; i<rl->vlc.table_size; i++){
|
|
int code= rl->vlc.table[i][0];
|
|
int len = rl->vlc.table[i][1];
|
|
int level, run;
|
|
|
|
if(len==0){ // illegal code
|
|
run= 66;
|
|
level= MAX_LEVEL;
|
|
}else if(len<0){ //more bits needed
|
|
run= 0;
|
|
level= code;
|
|
}else{
|
|
if(code==rl->n){ //esc
|
|
run= 66;
|
|
level= 0;
|
|
}else{
|
|
run= rl->table_run [code] + 1;
|
|
level= rl->table_level[code] * qmul + qadd;
|
|
if(code >= rl->last) run+=192;
|
|
}
|
|
}
|
|
rl->rl_vlc[q][i].len= len;
|
|
rl->rl_vlc[q][i].level= level;
|
|
rl->rl_vlc[q][i].run= run;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* init vlcs */
|
|
|
|
/* XXX: find a better solution to handle static init */
|
|
void h263_decode_init_vlc(MpegEncContext *s)
|
|
{
|
|
static int done = 0;
|
|
|
|
if (!done) {
|
|
done = 1;
|
|
|
|
init_vlc(&intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 8,
|
|
intra_MCBPC_bits, 1, 1,
|
|
intra_MCBPC_code, 1, 1);
|
|
init_vlc(&inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 25,
|
|
inter_MCBPC_bits, 1, 1,
|
|
inter_MCBPC_code, 1, 1);
|
|
init_vlc(&cbpy_vlc, CBPY_VLC_BITS, 16,
|
|
&cbpy_tab[0][1], 2, 1,
|
|
&cbpy_tab[0][0], 2, 1);
|
|
init_vlc(&mv_vlc, MV_VLC_BITS, 33,
|
|
&mvtab[0][1], 2, 1,
|
|
&mvtab[0][0], 2, 1);
|
|
init_rl(&rl_inter);
|
|
init_rl(&rl_intra);
|
|
init_rl(&rl_intra_aic);
|
|
init_vlc_rl(&rl_inter);
|
|
init_vlc_rl(&rl_intra);
|
|
init_vlc_rl(&rl_intra_aic);
|
|
init_vlc(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
|
|
&DCtab_lum[0][1], 2, 1,
|
|
&DCtab_lum[0][0], 2, 1);
|
|
init_vlc(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
|
|
&DCtab_chrom[0][1], 2, 1,
|
|
&DCtab_chrom[0][0], 2, 1);
|
|
init_vlc(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
|
|
&sprite_trajectory_tab[0][1], 4, 2,
|
|
&sprite_trajectory_tab[0][0], 4, 2);
|
|
init_vlc(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
|
|
&mb_type_b_tab[0][1], 2, 1,
|
|
&mb_type_b_tab[0][0], 2, 1);
|
|
}
|
|
|
|
s->progressive_sequence=1; // set to most likely for the case of incomplete headers
|
|
}
|
|
|
|
int h263_decode_gob_header(MpegEncContext *s)
|
|
{
|
|
unsigned int val, gfid;
|
|
|
|
/* Check for GOB Start Code */
|
|
val = show_bits(&s->gb, 16);
|
|
if (val == 0) {
|
|
/* We have a GBSC probably with GSTUFF */
|
|
skip_bits(&s->gb, 16); /* Drop the zeros */
|
|
while (get_bits1(&s->gb) == 0); /* Seek the '1' bit */
|
|
#ifdef DEBUG
|
|
fprintf(stderr,"\nGOB Start Code at MB %d\n", (s->mb_y * s->mb_width) + s->mb_x);
|
|
#endif
|
|
s->gob_number = get_bits(&s->gb, 5); /* GN */
|
|
gfid = get_bits(&s->gb, 2); /* GFID */
|
|
s->qscale = get_bits(&s->gb, 5); /* GQUANT */
|
|
#ifdef DEBUG
|
|
fprintf(stderr, "\nGN: %u GFID: %u Quant: %u\n", s->gob_number, gfid, s->qscale);
|
|
#endif
|
|
return 1;
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
static inline void memsetw(short *tab, int val, int n)
|
|
{
|
|
int i;
|
|
for(i=0;i<n;i++)
|
|
tab[i] = val;
|
|
}
|
|
|
|
void ff_mpeg4_init_partitions(MpegEncContext *s)
|
|
{
|
|
init_put_bits(&s->tex_pb, s->tex_pb_buffer, PB_BUFFER_SIZE, NULL, NULL);
|
|
init_put_bits(&s->pb2 , s->pb2_buffer , PB_BUFFER_SIZE, NULL, NULL);
|
|
}
|
|
|
|
void ff_mpeg4_merge_partitions(MpegEncContext *s)
|
|
{
|
|
const int pb2_len = get_bit_count(&s->pb2 );
|
|
const int tex_pb_len= get_bit_count(&s->tex_pb);
|
|
const int bits= get_bit_count(&s->pb);
|
|
|
|
if(s->pict_type==I_TYPE){
|
|
put_bits(&s->pb, 19, DC_MARKER);
|
|
s->misc_bits+=19 + pb2_len + bits - s->last_bits;
|
|
s->i_tex_bits+= tex_pb_len;
|
|
}else{
|
|
put_bits(&s->pb, 17, MOTION_MARKER);
|
|
s->misc_bits+=17 + pb2_len;;
|
|
s->mv_bits+= bits - s->last_bits;
|
|
s->p_tex_bits+= tex_pb_len;
|
|
}
|
|
|
|
flush_put_bits(&s->pb2);
|
|
flush_put_bits(&s->tex_pb);
|
|
|
|
ff_copy_bits(&s->pb, s->pb2_buffer , pb2_len);
|
|
ff_copy_bits(&s->pb, s->tex_pb_buffer, tex_pb_len);
|
|
s->last_bits= get_bit_count(&s->pb);
|
|
}
|
|
|
|
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
|
|
{
|
|
int mb_num_bits= av_log2(s->mb_num - 1) + 1;
|
|
|
|
ff_mpeg4_stuffing(&s->pb);
|
|
if(s->pict_type==I_TYPE)
|
|
put_bits(&s->pb, 16, 0);
|
|
else if(s->pict_type==B_TYPE)
|
|
put_bits(&s->pb, MAX(MAX(s->f_code, s->b_code)+15, 17), 0);
|
|
else /* S/P_TYPE */
|
|
put_bits(&s->pb, s->f_code+15, 0);
|
|
put_bits(&s->pb, 1, 1);
|
|
|
|
put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width);
|
|
put_bits(&s->pb, 5, s->qscale);
|
|
put_bits(&s->pb, 1, 0); /* no HEC */
|
|
}
|
|
|
|
/**
|
|
* decodes the next video packet and sets s->next_qscale
|
|
* returns mb_num of the next packet or <0 if something went wrong
|
|
*/
|
|
static int decode_video_packet_header(MpegEncContext *s, GetBitContext *gb)
|
|
{
|
|
int bits;
|
|
int mb_num_bits= av_log2(s->mb_num - 1) + 1;
|
|
int header_extension=0, mb_num;
|
|
//printf("%X\n", show_bits(&gb, 24));
|
|
//printf("parse_video_packet_header\n");
|
|
// if(show_aligned_bits(gb, 1, 16) != 0) return -1;
|
|
|
|
/* is there enough space left for a video packet + header */
|
|
if( get_bits_count(gb) > gb->size*8-20) return -1;
|
|
|
|
//printf("resync at %d %d\n", s->mb_x, s->mb_y);
|
|
// skip_bits(gb, 1);
|
|
// align_get_bits(gb);
|
|
if(get_bits(gb, 16)!=0){
|
|
printf("internal error while decoding video packet header\n");
|
|
}
|
|
|
|
//printf("%X\n", show_bits(gb, 24));
|
|
bits=0;
|
|
while(!get_bits1(gb) && bits<30) bits++;
|
|
if((s->pict_type == P_TYPE || s->pict_type == S_TYPE) && bits != s->f_code-1){
|
|
printf("marker does not match f_code (is: %d should be: %d pos: %d end %d x: %d y: %d)\n",
|
|
bits+1, s->f_code, get_bits_count(gb), gb->size*8, s->mb_x, s->mb_y);
|
|
return -1;
|
|
}else if(s->pict_type == I_TYPE && bits != 0){
|
|
printf("marker too long\n");
|
|
return -1;
|
|
}else if(s->pict_type == B_TYPE && bits != MAX(MAX(s->f_code, s->b_code)-1, 1)){
|
|
printf("marker does not match f/b_code\n");
|
|
return -1;
|
|
}
|
|
//printf("%X\n", show_bits(gb, 24));
|
|
|
|
if(s->shape != RECT_SHAPE){
|
|
header_extension= get_bits1(gb);
|
|
//FIXME more stuff here
|
|
}
|
|
|
|
mb_num= get_bits(gb, mb_num_bits);
|
|
if(mb_num < s->mb_x + s->mb_y*s->mb_width || mb_num>=s->mb_num){
|
|
fprintf(stderr, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_x + s->mb_y*s->mb_width);
|
|
return -1;
|
|
}
|
|
|
|
if(s->shape != BIN_ONLY_SHAPE){
|
|
s->next_resync_qscale= get_bits(gb, 5);
|
|
if(s->next_resync_qscale==0)
|
|
s->next_resync_qscale= s->qscale;
|
|
if(s->next_resync_qscale==0){
|
|
fprintf(stderr, "qscale==0\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if(s->shape == RECT_SHAPE){
|
|
header_extension= get_bits1(gb);
|
|
}
|
|
if(header_extension){
|
|
int time_increment;
|
|
int time_incr=0;
|
|
|
|
while (get_bits1(gb) != 0)
|
|
time_incr++;
|
|
|
|
check_marker(gb, "before time_increment in video packed header");
|
|
time_increment= get_bits(gb, s->time_increment_bits);
|
|
check_marker(gb, "before vop_coding_type in video packed header");
|
|
|
|
skip_bits(gb, 2); /* vop coding type */
|
|
//FIXME not rect stuff here
|
|
|
|
if(s->shape != BIN_ONLY_SHAPE){
|
|
skip_bits(gb, 3); /* intra dc vlc threshold */
|
|
|
|
if(s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE && s->num_sprite_warping_points){
|
|
mpeg4_decode_sprite_trajectory(s);
|
|
fprintf(stderr, "untested\n");
|
|
}
|
|
|
|
//FIXME reduced res stuff here
|
|
|
|
if (s->pict_type != I_TYPE) {
|
|
int f_code = get_bits(gb, 3); /* fcode_for */
|
|
if(f_code==0){
|
|
printf("Error, video packet header damaged (f_code=0)\n");
|
|
}
|
|
}
|
|
if (s->pict_type == B_TYPE) {
|
|
int b_code = get_bits(gb, 3);
|
|
if(b_code==0){
|
|
printf("Error, video packet header damaged (b_code=0)\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//FIXME new-pred stuff
|
|
|
|
//printf("parse ok %d %d %d %d\n", mb_num, s->mb_x + s->mb_y*s->mb_width, get_bits_count(gb), get_bits_count(&s->gb));
|
|
|
|
return mb_num;
|
|
}
|
|
|
|
void ff_mpeg4_clean_buffers(MpegEncContext *s)
|
|
{
|
|
int c_wrap, c_xy, l_wrap, l_xy;
|
|
|
|
l_wrap= s->block_wrap[0];
|
|
l_xy= s->mb_y*l_wrap*2 + s->mb_x*2;
|
|
c_wrap= s->block_wrap[4];
|
|
c_xy= s->mb_y*c_wrap + s->mb_x;
|
|
|
|
/* clean DC */
|
|
memsetw(s->dc_val[0] + l_xy, 1024, l_wrap*2+1);
|
|
memsetw(s->dc_val[1] + c_xy, 1024, c_wrap+1);
|
|
memsetw(s->dc_val[2] + c_xy, 1024, c_wrap+1);
|
|
|
|
/* clean AC */
|
|
memset(s->ac_val[0] + l_xy, 0, (l_wrap*2+1)*16*sizeof(INT16));
|
|
memset(s->ac_val[1] + c_xy, 0, (c_wrap +1)*16*sizeof(INT16));
|
|
memset(s->ac_val[2] + c_xy, 0, (c_wrap +1)*16*sizeof(INT16));
|
|
|
|
/* clean MV */
|
|
// we cant clear the MVs as they might be needed by a b frame
|
|
// memset(s->motion_val + l_xy, 0, (l_wrap*2+1)*2*sizeof(INT16));
|
|
// memset(s->motion_val, 0, 2*sizeof(INT16)*(2 + s->mb_width*2)*(2 + s->mb_height*2));
|
|
s->last_mv[0][0][0]=
|
|
s->last_mv[0][0][1]=
|
|
s->last_mv[1][0][0]=
|
|
s->last_mv[1][0][1]= 0;
|
|
}
|
|
|
|
/* searches for the next resync marker clears ac,dc,mc, and sets s->next_resync_gb, s->mb_num_left */
|
|
int ff_mpeg4_resync(MpegEncContext *s)
|
|
{
|
|
GetBitContext gb;
|
|
|
|
/* search & parse next resync marker */
|
|
|
|
gb= s->next_resync_gb;
|
|
align_get_bits(&gb);
|
|
//printf("mpeg4_resync %d next:%d \n", get_bits_count(&gb), get_bits_count(&s->next_resync_gb));
|
|
for(;;) {
|
|
int v= show_bits(&gb, 24);
|
|
if( get_bits_count(&gb) >= gb.size*8-24 || v == 1 /* start-code */){
|
|
s->mb_num_left= s->mb_num - s->mb_x - s->mb_y*s->mb_width;
|
|
//printf("mpeg4_resync end\n");
|
|
s->gb= s->next_resync_gb; //continue at the next resync marker
|
|
return -1;
|
|
}else if(v>>8 == 0){
|
|
int next;
|
|
s->next_resync_pos= get_bits_count(&gb);
|
|
|
|
next= decode_video_packet_header(s, &gb);
|
|
if(next >= 0){
|
|
s->mb_num_left= next - s->mb_x - s->mb_y*s->mb_width;
|
|
break;
|
|
}
|
|
|
|
align_get_bits(&gb);
|
|
}
|
|
skip_bits(&gb, 8);
|
|
}
|
|
s->next_resync_gb=gb;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void init_block_index(MpegEncContext *s)
|
|
{
|
|
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
|
|
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1) + s->mb_x*2;
|
|
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;
|
|
s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2) + s->mb_x*2;
|
|
s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
|
|
s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
|
|
}
|
|
|
|
static inline void update_block_index(MpegEncContext *s)
|
|
{
|
|
s->block_index[0]+=2;
|
|
s->block_index[1]+=2;
|
|
s->block_index[2]+=2;
|
|
s->block_index[3]+=2;
|
|
s->block_index[4]++;
|
|
s->block_index[5]++;
|
|
}
|
|
|
|
/**
|
|
* decodes the first & second partition
|
|
* returns error type or 0 if no error
|
|
*/
|
|
int ff_mpeg4_decode_partitions(MpegEncContext *s)
|
|
{
|
|
static const INT8 quant_tab[4] = { -1, -2, 1, 2 };
|
|
int mb_num;
|
|
|
|
/* decode first partition */
|
|
mb_num=0;
|
|
s->first_slice_line=1;
|
|
s->mb_x= s->resync_mb_x;
|
|
for(s->mb_y= s->resync_mb_y; mb_num < s->mb_num_left; s->mb_y++){
|
|
init_block_index(s);
|
|
for(; mb_num < s->mb_num_left && s->mb_x<s->mb_width; s->mb_x++){
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width;
|
|
int cbpc;
|
|
int dir=0;
|
|
|
|
mb_num++;
|
|
update_block_index(s);
|
|
if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1)
|
|
s->first_slice_line=0;
|
|
|
|
if(s->mb_x==0) PRINT_MB_TYPE("\n");
|
|
|
|
if(s->pict_type==I_TYPE){
|
|
int i;
|
|
|
|
PRINT_MB_TYPE("I");
|
|
cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1);
|
|
if (cbpc < 0){
|
|
fprintf(stderr, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_DESYNC;
|
|
}
|
|
s->cbp_table[xy]= cbpc & 3;
|
|
s->mb_type[xy]= MB_TYPE_INTRA;
|
|
s->mb_intra = 1;
|
|
|
|
if(cbpc & 4) {
|
|
s->qscale += quant_tab[get_bits(&s->gb, 2)];
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
s->qscale_table[xy]= s->qscale;
|
|
|
|
s->mbintra_table[xy]= 1;
|
|
for(i=0; i<6; i++){
|
|
int dc_pred_dir;
|
|
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
|
|
if(dc < 0){
|
|
fprintf(stderr, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_DESYNC;
|
|
}
|
|
dir<<=1;
|
|
if(dc_pred_dir) dir|=1;
|
|
}
|
|
s->pred_dir_table[xy]= dir;
|
|
}else{ /* P/S_TYPE */
|
|
int mx, my, pred_x, pred_y;
|
|
INT16 * const mot_val= s->motion_val[s->block_index[0]];
|
|
const int stride= s->block_wrap[0]*2;
|
|
|
|
if(get_bits1(&s->gb)){
|
|
/* skip mb */
|
|
s->mb_type[xy]= MB_TYPE_SKIPED;
|
|
if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
|
|
const int a= s->sprite_warping_accuracy;
|
|
PRINT_MB_TYPE("G");
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
mx = s->sprite_offset[0][0] / (1<<(a-s->quarter_sample));
|
|
my = s->sprite_offset[0][1] / (1<<(a-s->quarter_sample));
|
|
}else{
|
|
mx = RSHIFT(s->sprite_offset[0][0], a-s->quarter_sample);
|
|
my = RSHIFT(s->sprite_offset[0][1], a-s->quarter_sample);
|
|
s->mb_type[xy]= MB_TYPE_GMC | MB_TYPE_SKIPED;
|
|
}
|
|
}else{
|
|
PRINT_MB_TYPE("S");
|
|
mx = 0;
|
|
my = 0;
|
|
}
|
|
mot_val[0 ]= mot_val[2 ]=
|
|
mot_val[0+stride]= mot_val[2+stride]= mx;
|
|
mot_val[1 ]= mot_val[3 ]=
|
|
mot_val[1+stride]= mot_val[3+stride]= my;
|
|
|
|
if(s->mbintra_table[xy])
|
|
ff_clean_intra_table_entries(s);
|
|
|
|
continue;
|
|
}
|
|
cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
|
|
if (cbpc < 0){
|
|
fprintf(stderr, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_DESYNC;
|
|
}
|
|
if (cbpc > 20)
|
|
cbpc+=3;
|
|
else if (cbpc == 20)
|
|
fprintf(stderr, "Stuffing !");
|
|
s->cbp_table[xy]= cbpc&(8+3); //8 is dquant
|
|
|
|
s->mb_intra = ((cbpc & 4) != 0);
|
|
|
|
if(s->mb_intra){
|
|
PRINT_MB_TYPE("I");
|
|
s->mbintra_table[xy]= 1;
|
|
s->mb_type[xy]= MB_TYPE_INTRA;
|
|
mot_val[0 ]= mot_val[2 ]=
|
|
mot_val[0+stride]= mot_val[2+stride]= 0;
|
|
mot_val[1 ]= mot_val[3 ]=
|
|
mot_val[1+stride]= mot_val[3+stride]= 0;
|
|
}else{
|
|
if(s->mbintra_table[xy])
|
|
ff_clean_intra_table_entries(s);
|
|
|
|
if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
|
|
s->mcsel= get_bits1(&s->gb);
|
|
else s->mcsel= 0;
|
|
|
|
if ((cbpc & 16) == 0) {
|
|
PRINT_MB_TYPE("P");
|
|
/* 16x16 motion prediction */
|
|
s->mb_type[xy]= MB_TYPE_INTER;
|
|
|
|
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
|
if(!s->mcsel)
|
|
mx = h263_decode_motion(s, pred_x, s->f_code);
|
|
else {
|
|
const int a= s->sprite_warping_accuracy;
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
mx = s->sprite_offset[0][0] / (1<<(a-s->quarter_sample));
|
|
}else{
|
|
mx = RSHIFT(s->sprite_offset[0][0], a-s->quarter_sample);
|
|
}
|
|
}
|
|
if (mx >= 0xffff)
|
|
return DECODING_DESYNC;
|
|
|
|
if(!s->mcsel)
|
|
my = h263_decode_motion(s, pred_y, s->f_code);
|
|
else{
|
|
const int a= s->sprite_warping_accuracy;
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
my = s->sprite_offset[0][1] / (1<<(a-s->quarter_sample));
|
|
}else{
|
|
my = RSHIFT(s->sprite_offset[0][1], a-s->quarter_sample);
|
|
}
|
|
}
|
|
if (my >= 0xffff)
|
|
return DECODING_DESYNC;
|
|
mot_val[0 ]= mot_val[2 ] =
|
|
mot_val[0+stride]= mot_val[2+stride]= mx;
|
|
mot_val[1 ]= mot_val[3 ]=
|
|
mot_val[1+stride]= mot_val[3+stride]= my;
|
|
} else {
|
|
int i;
|
|
PRINT_MB_TYPE("4");
|
|
s->mb_type[xy]= MB_TYPE_INTER4V;
|
|
for(i=0;i<4;i++) {
|
|
INT16 *mot_val= h263_pred_motion(s, i, &pred_x, &pred_y);
|
|
mx = h263_decode_motion(s, pred_x, s->f_code);
|
|
if (mx >= 0xffff)
|
|
return DECODING_DESYNC;
|
|
|
|
my = h263_decode_motion(s, pred_y, s->f_code);
|
|
if (my >= 0xffff)
|
|
return DECODING_DESYNC;
|
|
mot_val[0] = mx;
|
|
mot_val[1] = my;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
s->mb_x= 0;
|
|
}
|
|
|
|
if (s->pict_type==I_TYPE && get_bits(&s->gb, 19)!=DC_MARKER ) s->decoding_error= DECODING_DESYNC;
|
|
else if(s->pict_type!=I_TYPE && get_bits(&s->gb, 17)!=MOTION_MARKER) s->decoding_error= DECODING_DESYNC;
|
|
if(s->decoding_error== DECODING_DESYNC){
|
|
fprintf(stderr, "marker missing after first partition at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_DESYNC;
|
|
}
|
|
|
|
/* decode second partition */
|
|
mb_num=0;
|
|
s->mb_x= s->resync_mb_x;
|
|
for(s->mb_y= s->resync_mb_y; mb_num < s->mb_num_left; s->mb_y++){
|
|
init_block_index(s);
|
|
for(; mb_num < s->mb_num_left && s->mb_x<s->mb_width; s->mb_x++){
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width;
|
|
|
|
mb_num++;
|
|
update_block_index(s);
|
|
|
|
if(s->pict_type==I_TYPE){
|
|
int ac_pred= get_bits1(&s->gb);
|
|
int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
|
if(cbpy<0){
|
|
fprintf(stderr, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_AC_LOST;
|
|
}
|
|
|
|
s->cbp_table[xy]|= cbpy<<2;
|
|
s->pred_dir_table[xy]|= ac_pred<<7;
|
|
}else{ /* P || S_TYPE */
|
|
if(s->mb_type[xy]&MB_TYPE_INTRA){
|
|
int dir=0,i;
|
|
int ac_pred = get_bits1(&s->gb);
|
|
int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
|
|
|
if(cbpy<0){
|
|
fprintf(stderr, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_ACDC_LOST;
|
|
}
|
|
|
|
if(s->cbp_table[xy] & 8) {
|
|
s->qscale += quant_tab[get_bits(&s->gb, 2)];
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
s->qscale_table[xy]= s->qscale;
|
|
|
|
for(i=0; i<6; i++){
|
|
int dc_pred_dir;
|
|
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
|
|
if(dc < 0){
|
|
fprintf(stderr, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_ACDC_LOST;
|
|
}
|
|
dir<<=1;
|
|
if(dc_pred_dir) dir|=1;
|
|
}
|
|
s->cbp_table[xy]&= 3; //remove dquant
|
|
s->cbp_table[xy]|= cbpy<<2;
|
|
s->pred_dir_table[xy]= dir | (ac_pred<<7);
|
|
}else if(s->mb_type[xy]&MB_TYPE_SKIPED){
|
|
s->qscale_table[xy]= s->qscale;
|
|
s->cbp_table[xy]= 0;
|
|
}else{
|
|
int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
|
|
|
if(cbpy<0){
|
|
fprintf(stderr, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_ACDC_LOST;
|
|
}
|
|
|
|
if(s->cbp_table[xy] & 8) {
|
|
//fprintf(stderr, "dquant\n");
|
|
s->qscale += quant_tab[get_bits(&s->gb, 2)];
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
s->qscale_table[xy]= s->qscale;
|
|
|
|
s->cbp_table[xy]&= 3; //remove dquant
|
|
s->cbp_table[xy]|= (cbpy^0xf)<<2;
|
|
}
|
|
}
|
|
}
|
|
s->mb_x= 0;
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mpeg4_decode_partitioned_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64])
|
|
{
|
|
int cbp, mb_type;
|
|
const int xy= s->mb_x + s->mb_y*s->mb_width;
|
|
|
|
if(s->mb_x==s->resync_mb_x && s->mb_y==s->resync_mb_y){ //Note resync_mb_{x,y}==0 at the start
|
|
int i;
|
|
int block_index_backup[6];
|
|
int qscale= s->qscale;
|
|
|
|
for(i=0; i<6; i++) block_index_backup[i]= s->block_index[i];
|
|
|
|
s->decoding_error= ff_mpeg4_decode_partitions(s);
|
|
|
|
for(i=0; i<6; i++) s->block_index[i]= block_index_backup[i];
|
|
s->first_slice_line=1;
|
|
s->mb_x= s->resync_mb_x;
|
|
s->mb_y= s->resync_mb_y;
|
|
s->qscale= qscale;
|
|
h263_dc_scale(s);
|
|
|
|
if(s->decoding_error==DECODING_DESYNC) return -1;
|
|
}
|
|
|
|
mb_type= s->mb_type[xy];
|
|
if(s->decoding_error)
|
|
cbp=0;
|
|
else
|
|
cbp = s->cbp_table[xy];
|
|
|
|
if(s->decoding_error!=DECODING_ACDC_LOST && s->qscale_table[xy] != s->qscale){
|
|
s->qscale= s->qscale_table[xy];
|
|
h263_dc_scale(s);
|
|
}
|
|
|
|
if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) {
|
|
int i;
|
|
for(i=0; i<4; i++){
|
|
s->mv[0][i][0] = s->motion_val[ s->block_index[i] ][0];
|
|
s->mv[0][i][1] = s->motion_val[ s->block_index[i] ][1];
|
|
}
|
|
s->mb_intra = mb_type&MB_TYPE_INTRA;
|
|
|
|
if (mb_type&MB_TYPE_SKIPED) {
|
|
/* skip mb */
|
|
for(i=0;i<6;i++)
|
|
s->block_last_index[i] = -1;
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
s->mv_type = MV_TYPE_16X16;
|
|
if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
|
|
s->mcsel=1;
|
|
s->mb_skiped = 0;
|
|
}else{
|
|
s->mcsel=0;
|
|
s->mb_skiped = 1;
|
|
}
|
|
return 0;
|
|
}else if(s->mb_intra && s->decoding_error!=DECODING_ACDC_LOST){
|
|
s->ac_pred = s->pred_dir_table[xy]>>7;
|
|
|
|
/* decode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
int ret= mpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, 1);
|
|
if(ret==DECODING_AC_LOST){
|
|
fprintf(stderr, "texture corrupted at %d %d (trying to continue with mc/dc only)\n", s->mb_x, s->mb_y);
|
|
s->decoding_error=DECODING_AC_LOST;
|
|
cbp=0;
|
|
}else if(ret==DECODING_ACDC_LOST){
|
|
fprintf(stderr, "dc corrupted at %d %d (trying to continue with mc only)\n", s->mb_x, s->mb_y);
|
|
s->decoding_error=DECODING_ACDC_LOST;
|
|
break;
|
|
}
|
|
}
|
|
}else if(!s->mb_intra){
|
|
// s->mcsel= 0; //FIXME do we need to init that
|
|
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
if (mb_type&MB_TYPE_INTER4V) {
|
|
s->mv_type = MV_TYPE_8X8;
|
|
} else {
|
|
s->mv_type = MV_TYPE_16X16;
|
|
}
|
|
if(s->decoding_error==0 && cbp){
|
|
/* decode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
int ret= mpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, 0);
|
|
if(ret==DECODING_AC_LOST){
|
|
fprintf(stderr, "texture corrupted at %d %d (trying to continue with mc/dc only)\n", s->mb_x, s->mb_y);
|
|
s->decoding_error=DECODING_AC_LOST;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else { /* I-Frame */
|
|
int i;
|
|
s->mb_intra = 1;
|
|
s->ac_pred = s->pred_dir_table[xy]>>7;
|
|
|
|
/* decode each block */
|
|
for (i = 0; i < 6; i++) {
|
|
int ret= mpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, 1);
|
|
if(ret==DECODING_AC_LOST){
|
|
fprintf(stderr, "texture corrupted at %d %d (trying to continue with dc only)\n", s->mb_x, s->mb_y);
|
|
s->decoding_error=DECODING_AC_LOST;
|
|
cbp=0;
|
|
}else if(ret==DECODING_ACDC_LOST){
|
|
fprintf(stderr, "dc corrupted at %d %d\n", s->mb_x, s->mb_y);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#if 0
|
|
static inline void decode_interlaced_info(MpegEncContext *s, int cbp, int mb_type){
|
|
s->mv_type= 0;
|
|
if(!s->progressive_sequence){
|
|
if(cbp || s->mb_intra)
|
|
s->interlaced_dct= get_bits1(&s->gb);
|
|
|
|
if(!s->mb_intra){
|
|
if( s->pict_type==P_TYPE //FIXME check that 4MV is forbidden
|
|
|| (s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && !s->mcsel)
|
|
|| (s->pict_type==B_TYPE && mb_type!=0) ){
|
|
|
|
if(get_bits1(&s->gb)){
|
|
s->mv_type= MV_TYPE_FIELD;
|
|
|
|
if( s->pict_type==P_TYPE
|
|
|| (s->pict_type==B_TYPE && mb_type!=2)){
|
|
s->field_select[0][0]= get_bits1(&s->gb);
|
|
s->field_select[0][1]= get_bits1(&s->gb);
|
|
}
|
|
if(s->pict_type==B_TYPE && mb_type!=3){
|
|
s->field_select[1][0]= get_bits1(&s->gb);
|
|
s->field_select[1][1]= get_bits1(&s->gb);
|
|
}
|
|
}else
|
|
s->mv_type= 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int h263_decode_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64])
|
|
{
|
|
int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
|
|
INT16 *mot_val;
|
|
static INT8 quant_tab[4] = { -1, -2, 1, 2 };
|
|
|
|
if(s->mb_x==0) PRINT_MB_TYPE("\n");
|
|
|
|
if(s->resync_marker){
|
|
if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
|
|
s->first_slice_line=0;
|
|
}
|
|
}
|
|
|
|
if(s->data_partitioning && s->pict_type!=B_TYPE)
|
|
return mpeg4_decode_partitioned_mb(s, block);
|
|
|
|
if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) {
|
|
if (get_bits1(&s->gb)) {
|
|
/* skip mb */
|
|
s->mb_intra = 0;
|
|
for(i=0;i<6;i++)
|
|
s->block_last_index[i] = -1;
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
s->mv_type = MV_TYPE_16X16;
|
|
if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){
|
|
const int a= s->sprite_warping_accuracy;
|
|
// int l = (1 << (s->f_code - 1)) * 32;
|
|
PRINT_MB_TYPE("G");
|
|
s->mcsel=1;
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
s->mv[0][0][0] = s->sprite_offset[0][0] / (1<<(a-s->quarter_sample));
|
|
s->mv[0][0][1] = s->sprite_offset[0][1] / (1<<(a-s->quarter_sample));
|
|
}else{
|
|
s->mv[0][0][0] = RSHIFT(s->sprite_offset[0][0], a-s->quarter_sample);
|
|
s->mv[0][0][1] = RSHIFT(s->sprite_offset[0][1], a-s->quarter_sample);
|
|
}
|
|
/* if (s->mv[0][0][0] < -l) s->mv[0][0][0]= -l;
|
|
else if (s->mv[0][0][0] >= l) s->mv[0][0][0]= l-1;
|
|
if (s->mv[0][0][1] < -l) s->mv[0][0][1]= -l;
|
|
else if (s->mv[0][0][1] >= l) s->mv[0][0][1]= l-1;*/
|
|
|
|
s->mb_skiped = 0;
|
|
}else{
|
|
PRINT_MB_TYPE("S");
|
|
s->mcsel=0;
|
|
s->mv[0][0][0] = 0;
|
|
s->mv[0][0][1] = 0;
|
|
s->mb_skiped = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
|
|
//fprintf(stderr, "\tCBPC: %d", cbpc);
|
|
if (cbpc < 0)
|
|
return -1;
|
|
if (cbpc > 20)
|
|
cbpc+=3;
|
|
else if (cbpc == 20)
|
|
fprintf(stderr, "Stuffing !");
|
|
|
|
dquant = cbpc & 8;
|
|
s->mb_intra = ((cbpc & 4) != 0);
|
|
if (s->mb_intra) goto intra;
|
|
|
|
if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
|
|
s->mcsel= get_bits1(&s->gb);
|
|
else s->mcsel= 0;
|
|
cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
|
cbp = (cbpc & 3) | ((cbpy ^ 0xf) << 2);
|
|
if (dquant) {
|
|
s->qscale += quant_tab[get_bits(&s->gb, 2)];
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
if((!s->progressive_sequence) && (cbp || s->workaround_bugs==2))
|
|
s->interlaced_dct= get_bits1(&s->gb);
|
|
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
if ((cbpc & 16) == 0) {
|
|
if(s->mcsel){
|
|
const int a= s->sprite_warping_accuracy;
|
|
PRINT_MB_TYPE("G");
|
|
/* 16x16 global motion prediction */
|
|
s->mv_type = MV_TYPE_16X16;
|
|
// int l = (1 << (s->f_code - 1)) * 32;
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
mx = s->sprite_offset[0][0] / (1<<(a-s->quarter_sample));
|
|
my = s->sprite_offset[0][1] / (1<<(a-s->quarter_sample));
|
|
}else{
|
|
mx = RSHIFT(s->sprite_offset[0][0], a-s->quarter_sample);
|
|
my = RSHIFT(s->sprite_offset[0][1], a-s->quarter_sample);
|
|
}
|
|
// int l = (1 << (s->f_code - 1)) * 32;
|
|
s->mv[0][0][0] = mx;
|
|
s->mv[0][0][1] = my;
|
|
}else if((!s->progressive_sequence) && get_bits1(&s->gb)){
|
|
PRINT_MB_TYPE("f");
|
|
/* 16x8 field motion prediction */
|
|
s->mv_type= MV_TYPE_FIELD;
|
|
|
|
s->field_select[0][0]= get_bits1(&s->gb);
|
|
s->field_select[0][1]= get_bits1(&s->gb);
|
|
|
|
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
|
|
|
for(i=0; i<2; i++){
|
|
mx = h263_decode_motion(s, pred_x, s->f_code);
|
|
if (mx >= 0xffff)
|
|
return -1;
|
|
|
|
my = h263_decode_motion(s, pred_y/2, s->f_code);
|
|
if (my >= 0xffff)
|
|
return -1;
|
|
|
|
s->mv[0][i][0] = mx;
|
|
s->mv[0][i][1] = my;
|
|
}
|
|
}else{
|
|
PRINT_MB_TYPE("P");
|
|
/* 16x16 motion prediction */
|
|
s->mv_type = MV_TYPE_16X16;
|
|
h263_pred_motion(s, 0, &pred_x, &pred_y);
|
|
if (s->umvplus_dec)
|
|
mx = h263p_decode_umotion(s, pred_x);
|
|
else
|
|
mx = h263_decode_motion(s, pred_x, s->f_code);
|
|
|
|
if (mx >= 0xffff)
|
|
return -1;
|
|
|
|
if (s->umvplus_dec)
|
|
my = h263p_decode_umotion(s, pred_y);
|
|
else
|
|
my = h263_decode_motion(s, pred_y, s->f_code);
|
|
|
|
if (my >= 0xffff)
|
|
return -1;
|
|
s->mv[0][0][0] = mx;
|
|
s->mv[0][0][1] = my;
|
|
|
|
if (s->umvplus_dec && (mx - pred_x) == 1 && (my - pred_y) == 1)
|
|
skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
|
|
}
|
|
} else {
|
|
PRINT_MB_TYPE("4");
|
|
s->mv_type = MV_TYPE_8X8;
|
|
for(i=0;i<4;i++) {
|
|
mot_val = h263_pred_motion(s, i, &pred_x, &pred_y);
|
|
if (s->umvplus_dec)
|
|
mx = h263p_decode_umotion(s, pred_x);
|
|
else
|
|
mx = h263_decode_motion(s, pred_x, s->f_code);
|
|
if (mx >= 0xffff)
|
|
return -1;
|
|
|
|
if (s->umvplus_dec)
|
|
my = h263p_decode_umotion(s, pred_y);
|
|
else
|
|
my = h263_decode_motion(s, pred_y, s->f_code);
|
|
if (my >= 0xffff)
|
|
return -1;
|
|
s->mv[0][i][0] = mx;
|
|
s->mv[0][i][1] = my;
|
|
if (s->umvplus_dec && (mx - pred_x) == 1 && (my - pred_y) == 1)
|
|
skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
|
|
mot_val[0] = mx;
|
|
mot_val[1] = my;
|
|
}
|
|
}
|
|
} else if(s->pict_type==B_TYPE) {
|
|
int modb1; // first bit of modb
|
|
int modb2; // second bit of modb
|
|
int mb_type;
|
|
uint16_t time_pp;
|
|
uint16_t time_pb;
|
|
int xy;
|
|
|
|
s->mb_intra = 0; //B-frames never contain intra blocks
|
|
s->mcsel=0; // ... true gmc blocks
|
|
|
|
if(s->mb_x==0){
|
|
for(i=0; i<2; i++){
|
|
s->last_mv[i][0][0]=
|
|
s->last_mv[i][0][1]=
|
|
s->last_mv[i][1][0]=
|
|
s->last_mv[i][1][1]= 0;
|
|
}
|
|
}
|
|
|
|
/* if we skipped it in the future P Frame than skip it now too */
|
|
s->mb_skiped= s->mbskip_table[s->mb_y * s->mb_width + s->mb_x]; // Note, skiptab=0 if last was GMC
|
|
|
|
if(s->mb_skiped){
|
|
/* skip mb */
|
|
for(i=0;i<6;i++)
|
|
s->block_last_index[i] = -1;
|
|
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
s->mv_type = MV_TYPE_16X16;
|
|
s->mv[0][0][0] = 0;
|
|
s->mv[0][0][1] = 0;
|
|
s->mv[1][0][0] = 0;
|
|
s->mv[1][0][1] = 0;
|
|
PRINT_MB_TYPE("s");
|
|
return 0;
|
|
}
|
|
|
|
modb1= get_bits1(&s->gb);
|
|
if(modb1){
|
|
mb_type=4; //like MB_TYPE_B_DIRECT but no vectors coded
|
|
cbp=0;
|
|
}else{
|
|
int field_mv;
|
|
|
|
modb2= get_bits1(&s->gb);
|
|
mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
|
|
if(modb2) cbp= 0;
|
|
else cbp= get_bits(&s->gb, 6);
|
|
|
|
if (mb_type!=MB_TYPE_B_DIRECT && cbp) {
|
|
if(get_bits1(&s->gb)){
|
|
s->qscale +=get_bits1(&s->gb)*4 - 2;
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
}
|
|
field_mv=0;
|
|
|
|
if(!s->progressive_sequence){
|
|
if(cbp)
|
|
s->interlaced_dct= get_bits1(&s->gb);
|
|
|
|
if(mb_type!=MB_TYPE_B_DIRECT && get_bits1(&s->gb)){
|
|
field_mv=1;
|
|
|
|
if(mb_type!=MB_TYPE_B_BACKW){
|
|
s->field_select[0][0]= get_bits1(&s->gb);
|
|
s->field_select[0][1]= get_bits1(&s->gb);
|
|
}
|
|
if(mb_type!=MB_TYPE_B_FORW){
|
|
s->field_select[1][0]= get_bits1(&s->gb);
|
|
s->field_select[1][1]= get_bits1(&s->gb);
|
|
}
|
|
}
|
|
}
|
|
|
|
s->mv_dir = 0;
|
|
if(mb_type!=MB_TYPE_B_DIRECT && !field_mv){
|
|
s->mv_type= MV_TYPE_16X16;
|
|
if(mb_type!=MB_TYPE_B_BACKW){
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
|
|
mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
|
|
my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
|
|
s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx;
|
|
s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my;
|
|
}
|
|
|
|
if(mb_type!=MB_TYPE_B_FORW){
|
|
s->mv_dir |= MV_DIR_BACKWARD;
|
|
|
|
mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
|
|
my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
|
|
s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx;
|
|
s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my;
|
|
}
|
|
if(mb_type!=MB_TYPE_B_DIRECT)
|
|
PRINT_MB_TYPE(mb_type==MB_TYPE_B_FORW ? "F" : (mb_type==MB_TYPE_B_BACKW ? "B" : "T"));
|
|
}else if(mb_type!=MB_TYPE_B_DIRECT){
|
|
s->mv_type= MV_TYPE_FIELD;
|
|
|
|
if(mb_type!=MB_TYPE_B_BACKW){
|
|
s->mv_dir = MV_DIR_FORWARD;
|
|
|
|
for(i=0; i<2; i++){
|
|
mx = h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code);
|
|
my = h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code);
|
|
s->last_mv[0][i][0]= s->mv[0][i][0] = mx;
|
|
s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2;
|
|
}
|
|
}
|
|
|
|
if(mb_type!=MB_TYPE_B_FORW){
|
|
s->mv_dir |= MV_DIR_BACKWARD;
|
|
|
|
for(i=0; i<2; i++){
|
|
mx = h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code);
|
|
my = h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code);
|
|
s->last_mv[1][i][0]= s->mv[1][i][0] = mx;
|
|
s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2;
|
|
}
|
|
}
|
|
if(mb_type!=MB_TYPE_B_DIRECT)
|
|
PRINT_MB_TYPE(mb_type==MB_TYPE_B_FORW ? "f" : (mb_type==MB_TYPE_B_BACKW ? "b" : "t"));
|
|
}
|
|
}
|
|
|
|
if(mb_type==4 || mb_type==MB_TYPE_B_DIRECT){
|
|
int mb_index= s->mb_x + s->mb_y*s->mb_width;
|
|
int i;
|
|
|
|
if(mb_type==4)
|
|
mx=my=0;
|
|
else{
|
|
mx = h263_decode_motion(s, 0, 1);
|
|
my = h263_decode_motion(s, 0, 1);
|
|
}
|
|
|
|
s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
|
|
xy= s->block_index[0];
|
|
time_pp= s->pp_time;
|
|
time_pb= s->pb_time;
|
|
|
|
//FIXME avoid divides
|
|
switch(s->co_located_type_table[mb_index]){
|
|
case 0:
|
|
s->mv_type= MV_TYPE_16X16;
|
|
s->mv[0][0][0] = s->motion_val[xy][0]*time_pb/time_pp + mx;
|
|
s->mv[0][0][1] = s->motion_val[xy][1]*time_pb/time_pp + my;
|
|
s->mv[1][0][0] = mx ? s->mv[0][0][0] - s->motion_val[xy][0]
|
|
: s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
|
|
s->mv[1][0][1] = my ? s->mv[0][0][1] - s->motion_val[xy][1]
|
|
: s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
|
|
PRINT_MB_TYPE(mb_type==4 ? "D" : "S");
|
|
break;
|
|
case CO_LOCATED_TYPE_4MV:
|
|
s->mv_type = MV_TYPE_8X8;
|
|
for(i=0; i<4; i++){
|
|
xy= s->block_index[i];
|
|
s->mv[0][i][0] = s->motion_val[xy][0]*time_pb/time_pp + mx;
|
|
s->mv[0][i][1] = s->motion_val[xy][1]*time_pb/time_pp + my;
|
|
s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->motion_val[xy][0]
|
|
: s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
|
|
s->mv[1][i][1] = my ? s->mv[0][i][1] - s->motion_val[xy][1]
|
|
: s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
|
|
}
|
|
PRINT_MB_TYPE("4");
|
|
break;
|
|
case CO_LOCATED_TYPE_FIELDMV:
|
|
s->mv_type = MV_TYPE_FIELD;
|
|
for(i=0; i<2; i++){
|
|
if(s->top_field_first){
|
|
time_pp= s->pp_field_time - s->field_select_table[mb_index][i] + i;
|
|
time_pb= s->pb_field_time - s->field_select_table[mb_index][i] + i;
|
|
}else{
|
|
time_pp= s->pp_field_time + s->field_select_table[mb_index][i] - i;
|
|
time_pb= s->pb_field_time + s->field_select_table[mb_index][i] - i;
|
|
}
|
|
s->mv[0][i][0] = s->field_mv_table[mb_index][i][0]*time_pb/time_pp + mx;
|
|
s->mv[0][i][1] = s->field_mv_table[mb_index][i][1]*time_pb/time_pp + my;
|
|
s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->field_mv_table[mb_index][i][0]
|
|
: s->field_mv_table[mb_index][i][0]*(time_pb - time_pp)/time_pp;
|
|
s->mv[1][i][1] = my ? s->mv[0][i][1] - s->field_mv_table[mb_index][i][1]
|
|
: s->field_mv_table[mb_index][i][1]*(time_pb - time_pp)/time_pp;
|
|
}
|
|
PRINT_MB_TYPE("=");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(mb_type<0 || mb_type>4){
|
|
printf("illegal MB_type\n");
|
|
return -1;
|
|
}
|
|
} else { /* I-Frame */
|
|
cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1);
|
|
if (cbpc < 0)
|
|
return -1;
|
|
dquant = cbpc & 4;
|
|
s->mb_intra = 1;
|
|
intra:
|
|
s->ac_pred = 0;
|
|
if (s->h263_pred || s->h263_aic) {
|
|
s->ac_pred = get_bits1(&s->gb);
|
|
if (s->ac_pred && s->h263_aic)
|
|
s->h263_aic_dir = get_bits1(&s->gb);
|
|
}
|
|
PRINT_MB_TYPE(s->ac_pred ? "A" : "I");
|
|
|
|
cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1);
|
|
if(cbpy<0) return -1;
|
|
cbp = (cbpc & 3) | (cbpy << 2);
|
|
if (dquant) {
|
|
s->qscale += quant_tab[get_bits(&s->gb, 2)];
|
|
if (s->qscale < 1)
|
|
s->qscale = 1;
|
|
else if (s->qscale > 31)
|
|
s->qscale = 31;
|
|
h263_dc_scale(s);
|
|
}
|
|
if(!s->progressive_sequence)
|
|
s->interlaced_dct= get_bits1(&s->gb);
|
|
|
|
/* decode each block */
|
|
if (s->h263_pred) {
|
|
for (i = 0; i < 6; i++) {
|
|
if (mpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, 1) < 0)
|
|
return -1;
|
|
}
|
|
} else {
|
|
for (i = 0; i < 6; i++) {
|
|
if (h263_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* decode each block */
|
|
if (s->h263_pred) {
|
|
for (i = 0; i < 6; i++) {
|
|
if (mpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, 0) < 0)
|
|
return -1;
|
|
}
|
|
} else {
|
|
for (i = 0; i < 6; i++) {
|
|
if (h263_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int h263_decode_motion(MpegEncContext * s, int pred, int f_code)
|
|
{
|
|
int code, val, sign, shift, l;
|
|
|
|
code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
|
|
if (code < 0)
|
|
return 0xffff;
|
|
|
|
if (code == 0)
|
|
return pred;
|
|
sign = get_bits1(&s->gb);
|
|
shift = f_code - 1;
|
|
val = (code - 1) << shift;
|
|
if (shift > 0)
|
|
val |= get_bits(&s->gb, shift);
|
|
val++;
|
|
if (sign)
|
|
val = -val;
|
|
val += pred;
|
|
|
|
/* modulo decoding */
|
|
if (!s->h263_long_vectors) {
|
|
l = (1 << (f_code - 1)) * 32;
|
|
if (val < -l) {
|
|
val += l<<1;
|
|
} else if (val >= l) {
|
|
val -= l<<1;
|
|
}
|
|
} else {
|
|
/* horrible h263 long vector mode */
|
|
if (pred < -31 && val < -63)
|
|
val += 64;
|
|
if (pred > 32 && val > 63)
|
|
val -= 64;
|
|
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/* Decodes RVLC of H.263+ UMV */
|
|
static int h263p_decode_umotion(MpegEncContext * s, int pred)
|
|
{
|
|
int code = 0, sign;
|
|
|
|
if (get_bits1(&s->gb)) /* Motion difference = 0 */
|
|
return pred;
|
|
|
|
code = 2 + get_bits1(&s->gb);
|
|
|
|
while (get_bits1(&s->gb))
|
|
{
|
|
code <<= 1;
|
|
code += get_bits1(&s->gb);
|
|
}
|
|
sign = code & 1;
|
|
code >>= 1;
|
|
|
|
code = (sign) ? (pred - code) : (pred + code);
|
|
#ifdef DEBUG
|
|
fprintf(stderr,"H.263+ UMV Motion = %d\n", code);
|
|
#endif
|
|
return code;
|
|
|
|
}
|
|
|
|
static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n, int coded)
|
|
{
|
|
int code, level, i, j, last, run;
|
|
RLTable *rl = &rl_inter;
|
|
const UINT8 *scan_table;
|
|
|
|
scan_table = zigzag_direct;
|
|
if (s->h263_aic && s->mb_intra) {
|
|
rl = &rl_intra_aic;
|
|
i = 0;
|
|
if (s->ac_pred) {
|
|
if (s->h263_aic_dir)
|
|
scan_table = ff_alternate_vertical_scan; /* left */
|
|
else
|
|
scan_table = ff_alternate_horizontal_scan; /* top */
|
|
}
|
|
} else if (s->mb_intra) {
|
|
/* DC coef */
|
|
if (s->h263_rv10 && s->rv10_version == 3 && s->pict_type == I_TYPE) {
|
|
int component, diff;
|
|
component = (n <= 3 ? 0 : n - 4 + 1);
|
|
level = s->last_dc[component];
|
|
if (s->rv10_first_dc_coded[component]) {
|
|
diff = rv_decode_dc(s, n);
|
|
if (diff == 0xffff)
|
|
return -1;
|
|
level += diff;
|
|
level = level & 0xff; /* handle wrap round */
|
|
s->last_dc[component] = level;
|
|
} else {
|
|
s->rv10_first_dc_coded[component] = 1;
|
|
}
|
|
} else {
|
|
level = get_bits(&s->gb, 8);
|
|
if (level == 255)
|
|
level = 128;
|
|
}
|
|
block[0] = level;
|
|
i = 1;
|
|
} else {
|
|
i = 0;
|
|
}
|
|
if (!coded) {
|
|
if (s->mb_intra && s->h263_aic)
|
|
goto not_coded;
|
|
s->block_last_index[n] = i - 1;
|
|
return 0;
|
|
}
|
|
|
|
for(;;) {
|
|
code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2);
|
|
if (code < 0)
|
|
return -1;
|
|
if (code == rl->n) {
|
|
/* escape */
|
|
last = get_bits1(&s->gb);
|
|
run = get_bits(&s->gb, 6);
|
|
level = (INT8)get_bits(&s->gb, 8);
|
|
if (s->h263_rv10 && level == -128) {
|
|
/* XXX: should patch encoder too */
|
|
level = get_bits(&s->gb, 12);
|
|
level= (level + ((-1)<<11)) ^ ((-1)<<11); //sign extension
|
|
}
|
|
} else {
|
|
run = rl->table_run[code];
|
|
level = rl->table_level[code];
|
|
last = code >= rl->last;
|
|
if (get_bits1(&s->gb))
|
|
level = -level;
|
|
}
|
|
i += run;
|
|
if (i >= 64)
|
|
return -1;
|
|
j = scan_table[i];
|
|
block[j] = level;
|
|
if (last)
|
|
break;
|
|
i++;
|
|
}
|
|
not_coded:
|
|
if (s->mb_intra && s->h263_aic) {
|
|
h263_pred_acdc(s, block, n);
|
|
i = 63;
|
|
}
|
|
s->block_last_index[n] = i;
|
|
return 0;
|
|
}
|
|
|
|
static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
|
|
{
|
|
int level, pred, code;
|
|
UINT16 *dc_val;
|
|
|
|
if (n < 4)
|
|
code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
|
|
else
|
|
code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
|
|
if (code < 0 || code > 9 /* && s->nbit<9 */){
|
|
fprintf(stderr, "illegal dc vlc\n");
|
|
return -1;
|
|
}
|
|
if (code == 0) {
|
|
level = 0;
|
|
} else {
|
|
level = get_bits(&s->gb, code);
|
|
if ((level >> (code - 1)) == 0) /* if MSB not set it is negative*/
|
|
level = - (level ^ ((1 << code) - 1));
|
|
if (code > 8){
|
|
if(get_bits1(&s->gb)==0){ /* marker */
|
|
fprintf(stderr, "dc marker bit missing\n");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
pred = ff_mpeg4_pred_dc(s, n, &dc_val, dir_ptr);
|
|
level += pred;
|
|
if (level < 0)
|
|
level = 0;
|
|
if (n < 4) {
|
|
*dc_val = level * s->y_dc_scale;
|
|
} else {
|
|
*dc_val = level * s->c_dc_scale;
|
|
}
|
|
return level;
|
|
}
|
|
|
|
/**
|
|
* decode a block
|
|
* returns 0 if everything went ok
|
|
* returns DECODING_AC_LOST if an error was detected during AC decoding
|
|
* returns DECODING_ACDC_LOST if an error was detected during DC decoding
|
|
*/
|
|
static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
|
|
int n, int coded, int intra)
|
|
{
|
|
int level, i, last, run;
|
|
int dc_pred_dir;
|
|
RLTable * rl;
|
|
RL_VLC_ELEM * rl_vlc;
|
|
const UINT8 * scan_table;
|
|
int qmul, qadd;
|
|
|
|
if(intra) {
|
|
/* DC coef */
|
|
if(s->data_partitioning && s->pict_type!=B_TYPE){
|
|
level = s->dc_val[0][ s->block_index[n] ];
|
|
if(n<4) level= (level + (s->y_dc_scale>>1))/s->y_dc_scale; //FIXME optimizs
|
|
else level= (level + (s->c_dc_scale>>1))/s->c_dc_scale;
|
|
dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_width]<<n)&32;
|
|
}else{
|
|
level = mpeg4_decode_dc(s, n, &dc_pred_dir);
|
|
if (level < 0)
|
|
return DECODING_ACDC_LOST;
|
|
}
|
|
block[0] = level;
|
|
i = 0;
|
|
if (!coded)
|
|
goto not_coded;
|
|
rl = &rl_intra;
|
|
rl_vlc = rl_intra.rl_vlc[0];
|
|
if(s->alternate_scan)
|
|
scan_table = ff_alternate_vertical_scan; /* left */
|
|
else if (s->ac_pred) {
|
|
if (dc_pred_dir == 0)
|
|
scan_table = ff_alternate_vertical_scan; /* left */
|
|
else
|
|
scan_table = ff_alternate_horizontal_scan; /* top */
|
|
} else {
|
|
scan_table = zigzag_direct;
|
|
}
|
|
qmul=1;
|
|
qadd=0;
|
|
} else {
|
|
i = -1;
|
|
if (!coded) {
|
|
s->block_last_index[n] = i;
|
|
return 0;
|
|
}
|
|
rl = &rl_inter;
|
|
|
|
if(s->alternate_scan)
|
|
scan_table = ff_alternate_vertical_scan; /* left */
|
|
else
|
|
scan_table = zigzag_direct;
|
|
|
|
if(s->mpeg_quant){
|
|
qmul=1;
|
|
qadd=0;
|
|
rl_vlc = rl_inter.rl_vlc[0];
|
|
}else{
|
|
qmul = s->qscale << 1;
|
|
qadd = (s->qscale - 1) | 1;
|
|
rl_vlc = rl_inter.rl_vlc[s->qscale];
|
|
}
|
|
}
|
|
{
|
|
OPEN_READER(re, &s->gb);
|
|
for(;;) {
|
|
UPDATE_CACHE(re, &s->gb);
|
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
|
if (level==0) {
|
|
int cache;
|
|
cache= GET_CACHE(re, &s->gb);
|
|
/* escape */
|
|
if (cache&0x80000000) {
|
|
if (cache&0x40000000) {
|
|
/* third escape */
|
|
SKIP_CACHE(re, &s->gb, 2);
|
|
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1);
|
|
run= SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6);
|
|
SKIP_COUNTER(re, &s->gb, 2+1+6);
|
|
UPDATE_CACHE(re, &s->gb);
|
|
|
|
if(SHOW_UBITS(re, &s->gb, 1)==0){
|
|
fprintf(stderr, "1. marker bit missing in 3. esc\n");
|
|
return DECODING_AC_LOST;
|
|
}; SKIP_CACHE(re, &s->gb, 1);
|
|
|
|
level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12);
|
|
|
|
if(SHOW_UBITS(re, &s->gb, 1)==0){
|
|
fprintf(stderr, "2. marker bit missing in 3. esc\n");
|
|
return DECODING_AC_LOST;
|
|
}; LAST_SKIP_CACHE(re, &s->gb, 1);
|
|
|
|
SKIP_COUNTER(re, &s->gb, 1+12+1);
|
|
|
|
if(level*s->qscale>1024 || level*s->qscale<-1024){
|
|
fprintf(stderr, "|level| overflow in 3. esc, qp=%d\n", s->qscale);
|
|
return DECODING_AC_LOST;
|
|
}
|
|
#if 1
|
|
{
|
|
const int abs_level= ABS(level);
|
|
if(abs_level<=MAX_LEVEL && run<=MAX_RUN && s->error_resilience>=0){
|
|
const int run1= run - rl->max_run[last][abs_level] - 1;
|
|
if(abs_level <= rl->max_level[last][run]){
|
|
fprintf(stderr, "illegal 3. esc, vlc encoding possible\n");
|
|
return DECODING_AC_LOST;
|
|
}
|
|
if(abs_level <= rl->max_level[last][run]*2){
|
|
fprintf(stderr, "illegal 3. esc, esc 1 encoding possible\n");
|
|
return DECODING_AC_LOST;
|
|
}
|
|
if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){
|
|
fprintf(stderr, "illegal 3. esc, esc 2 encoding possible\n");
|
|
return DECODING_AC_LOST;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (level>0) level= level * qmul + qadd;
|
|
else level= level * qmul - qadd;
|
|
|
|
i+= run + 1;
|
|
if(last) i+=192;
|
|
} else {
|
|
/* second escape */
|
|
#if MIN_CACHE_BITS < 20
|
|
LAST_SKIP_BITS(re, &s->gb, 2);
|
|
UPDATE_CACHE(re, &s->gb);
|
|
#else
|
|
SKIP_BITS(re, &s->gb, 2);
|
|
#endif
|
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
|
i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing
|
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
|
|
LAST_SKIP_BITS(re, &s->gb, 1);
|
|
}
|
|
} else {
|
|
/* first escape */
|
|
#if MIN_CACHE_BITS < 19
|
|
LAST_SKIP_BITS(re, &s->gb, 1);
|
|
UPDATE_CACHE(re, &s->gb);
|
|
#else
|
|
SKIP_BITS(re, &s->gb, 1);
|
|
#endif
|
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2);
|
|
i+= run;
|
|
level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing
|
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
|
|
LAST_SKIP_BITS(re, &s->gb, 1);
|
|
}
|
|
} else {
|
|
i+= run;
|
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
|
|
LAST_SKIP_BITS(re, &s->gb, 1);
|
|
}
|
|
if (i > 62){
|
|
i-= 192;
|
|
if(i&(~63)){
|
|
fprintf(stderr, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
|
|
return DECODING_AC_LOST;
|
|
}
|
|
|
|
block[scan_table[i]] = level;
|
|
break;
|
|
}
|
|
|
|
block[scan_table[i]] = level;
|
|
}
|
|
CLOSE_READER(re, &s->gb);
|
|
}
|
|
not_coded:
|
|
if (s->mb_intra) {
|
|
mpeg4_pred_ac(s, block, n, dc_pred_dir);
|
|
if (s->ac_pred) {
|
|
i = 63; /* XXX: not optimal */
|
|
}
|
|
}
|
|
s->block_last_index[n] = i;
|
|
return 0;
|
|
}
|
|
|
|
/* most is hardcoded. should extend to handle all h263 streams */
|
|
int h263_decode_picture_header(MpegEncContext *s)
|
|
{
|
|
int format, width, height;
|
|
|
|
/* picture start code */
|
|
if (get_bits(&s->gb, 22) != 0x20) {
|
|
fprintf(stderr, "Bad picture start code\n");
|
|
return -1;
|
|
}
|
|
/* temporal reference */
|
|
s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
|
|
|
|
/* PTYPE starts here */
|
|
if (get_bits1(&s->gb) != 1) {
|
|
/* marker */
|
|
fprintf(stderr, "Bad marker\n");
|
|
return -1;
|
|
}
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "Bad H263 id\n");
|
|
return -1; /* h263 id */
|
|
}
|
|
skip_bits1(&s->gb); /* split screen off */
|
|
skip_bits1(&s->gb); /* camera off */
|
|
skip_bits1(&s->gb); /* freeze picture release off */
|
|
|
|
/* Reset GOB number */
|
|
s->gob_number = 0;
|
|
|
|
format = get_bits(&s->gb, 3);
|
|
/*
|
|
0 forbidden
|
|
1 sub-QCIF
|
|
10 QCIF
|
|
7 extended PTYPE (PLUSPTYPE)
|
|
*/
|
|
|
|
if (format != 7 && format != 6) {
|
|
s->h263_plus = 0;
|
|
/* H.263v1 */
|
|
width = h263_format[format][0];
|
|
height = h263_format[format][1];
|
|
if (!width)
|
|
return -1;
|
|
|
|
s->width = width;
|
|
s->height = height;
|
|
s->pict_type = I_TYPE + get_bits1(&s->gb);
|
|
|
|
s->unrestricted_mv = get_bits1(&s->gb);
|
|
s->h263_long_vectors = s->unrestricted_mv;
|
|
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "H263 SAC not supported\n");
|
|
return -1; /* SAC: off */
|
|
}
|
|
if (get_bits1(&s->gb) != 0) {
|
|
s->mv_type = MV_TYPE_8X8; /* Advanced prediction mode */
|
|
}
|
|
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "H263 PB frame not supported\n");
|
|
return -1; /* not PB frame */
|
|
}
|
|
s->qscale = get_bits(&s->gb, 5);
|
|
skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
|
|
} else {
|
|
int ufep;
|
|
|
|
/* H.263v2 */
|
|
s->h263_plus = 1;
|
|
ufep = get_bits(&s->gb, 3); /* Update Full Extended PTYPE */
|
|
|
|
/* ufep other than 0 and 1 are reserved */
|
|
if (ufep == 1) {
|
|
/* OPPTYPE */
|
|
format = get_bits(&s->gb, 3);
|
|
dprintf("ufep=1, format: %d\n", format);
|
|
skip_bits(&s->gb,1); /* Custom PCF */
|
|
s->umvplus_dec = get_bits(&s->gb, 1); /* Unrestricted Motion Vector */
|
|
skip_bits1(&s->gb); /* Syntax-based Arithmetic Coding (SAC) */
|
|
if (get_bits1(&s->gb) != 0) {
|
|
s->mv_type = MV_TYPE_8X8; /* Advanced prediction mode */
|
|
}
|
|
if (get_bits1(&s->gb) != 0) { /* Advanced Intra Coding (AIC) */
|
|
s->h263_aic = 1;
|
|
}
|
|
|
|
skip_bits(&s->gb, 7);
|
|
/* these are the 7 bits: (in order of appearence */
|
|
/* Deblocking Filter */
|
|
/* Slice Structured */
|
|
/* Reference Picture Selection */
|
|
/* Independent Segment Decoding */
|
|
/* Alternative Inter VLC */
|
|
/* Modified Quantization */
|
|
/* Prevent start code emulation */
|
|
|
|
skip_bits(&s->gb, 3); /* Reserved */
|
|
} else if (ufep != 0) {
|
|
fprintf(stderr, "Bad UFEP type (%d)\n", ufep);
|
|
return -1;
|
|
}
|
|
|
|
/* MPPTYPE */
|
|
s->pict_type = get_bits(&s->gb, 3) + I_TYPE;
|
|
dprintf("pict_type: %d\n", s->pict_type);
|
|
if (s->pict_type != I_TYPE &&
|
|
s->pict_type != P_TYPE)
|
|
return -1;
|
|
skip_bits(&s->gb, 2);
|
|
s->no_rounding = get_bits1(&s->gb);
|
|
dprintf("RTYPE: %d\n", s->no_rounding);
|
|
skip_bits(&s->gb, 4);
|
|
|
|
/* Get the picture dimensions */
|
|
if (ufep) {
|
|
if (format == 6) {
|
|
/* Custom Picture Format (CPFMT) */
|
|
s->aspect_ratio_info = get_bits(&s->gb, 4);
|
|
dprintf("aspect: %d\n", s->aspect_ratio_info);
|
|
/* aspect ratios:
|
|
0 - forbidden
|
|
1 - 1:1
|
|
2 - 12:11 (CIF 4:3)
|
|
3 - 10:11 (525-type 4:3)
|
|
4 - 16:11 (CIF 16:9)
|
|
5 - 40:33 (525-type 16:9)
|
|
6-14 - reserved
|
|
*/
|
|
width = (get_bits(&s->gb, 9) + 1) * 4;
|
|
skip_bits1(&s->gb);
|
|
height = get_bits(&s->gb, 9) * 4;
|
|
dprintf("\nH.263+ Custom picture: %dx%d\n",width,height);
|
|
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
|
|
/* aspected dimensions */
|
|
s->aspected_width = get_bits(&s->gb, 8);
|
|
s->aspected_height = get_bits(&s->gb, 8);
|
|
}
|
|
} else {
|
|
width = h263_format[format][0];
|
|
height = h263_format[format][1];
|
|
}
|
|
if ((width == 0) || (height == 0))
|
|
return -1;
|
|
s->width = width;
|
|
s->height = height;
|
|
if (s->umvplus_dec) {
|
|
skip_bits1(&s->gb); /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
|
|
}
|
|
}
|
|
|
|
s->qscale = get_bits(&s->gb, 5);
|
|
}
|
|
/* PEI */
|
|
while (get_bits1(&s->gb) != 0) {
|
|
skip_bits(&s->gb, 8);
|
|
}
|
|
s->f_code = 1;
|
|
|
|
if(s->h263_aic){
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= h263_aic_dc_scale_table;
|
|
}else{
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mpeg4_decode_sprite_trajectory(MpegEncContext * s)
|
|
{
|
|
int i;
|
|
int a= 2<<s->sprite_warping_accuracy;
|
|
int rho= 3-s->sprite_warping_accuracy;
|
|
int r=16/a;
|
|
const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes
|
|
int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}};
|
|
int sprite_ref[4][2];
|
|
int virtual_ref[2][2];
|
|
int w2, h2;
|
|
int alpha=0, beta=0;
|
|
int w= s->width;
|
|
int h= s->height;
|
|
//printf("SP %d\n", s->sprite_warping_accuracy);
|
|
for(i=0; i<s->num_sprite_warping_points; i++){
|
|
int length;
|
|
int x=0, y=0;
|
|
|
|
length= get_vlc(&s->gb, &sprite_trajectory);
|
|
if(length){
|
|
x= get_bits(&s->gb, length);
|
|
//printf("lx %d %d\n", length, x);
|
|
if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
|
|
x = - (x ^ ((1 << length) - 1));
|
|
}
|
|
if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(&s->gb); /* marker bit */
|
|
|
|
length= get_vlc(&s->gb, &sprite_trajectory);
|
|
if(length){
|
|
y=get_bits(&s->gb, length);
|
|
//printf("ly %d %d\n", length, y);
|
|
if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
|
|
y = - (y ^ ((1 << length) - 1));
|
|
}
|
|
skip_bits1(&s->gb); /* marker bit */
|
|
//printf("%d %d %d %d\n", x, y, i, s->sprite_warping_accuracy);
|
|
//if(i>0 && (x!=0 || y!=0)) printf("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\n");
|
|
//x=y=0;
|
|
d[i][0]= x;
|
|
d[i][1]= y;
|
|
}
|
|
|
|
while((1<<alpha)<w) alpha++;
|
|
while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h'
|
|
w2= 1<<alpha;
|
|
h2= 1<<beta;
|
|
|
|
// Note, the 4th point isnt used for GMC
|
|
if(s->divx_version==500 && s->divx_build==413){
|
|
sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0];
|
|
sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1];
|
|
sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0];
|
|
sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1];
|
|
sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0];
|
|
sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1];
|
|
} else {
|
|
sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]);
|
|
sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]);
|
|
sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]);
|
|
sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]);
|
|
sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]);
|
|
sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]);
|
|
}
|
|
/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
|
|
sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
|
|
|
|
// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...)
|
|
// perhaps it should be reordered to be more readable ...
|
|
// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides
|
|
// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form
|
|
virtual_ref[0][0]= 16*(vop_ref[0][0] + w2)
|
|
+ ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w);
|
|
virtual_ref[0][1]= 16*vop_ref[0][1]
|
|
+ ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w);
|
|
virtual_ref[1][0]= 16*vop_ref[0][0]
|
|
+ ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h);
|
|
virtual_ref[1][1]= 16*(vop_ref[0][1] + h2)
|
|
+ ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h);
|
|
|
|
switch(s->num_sprite_warping_points)
|
|
{
|
|
case 0:
|
|
s->sprite_offset[0][0]= 0;
|
|
s->sprite_offset[0][1]= 0;
|
|
s->sprite_offset[1][0]= 0;
|
|
s->sprite_offset[1][1]= 0;
|
|
s->sprite_delta[0][0][0]= a;
|
|
s->sprite_delta[0][0][1]= 0;
|
|
s->sprite_delta[0][1][0]= 0;
|
|
s->sprite_delta[0][1][1]= a;
|
|
s->sprite_delta[1][0][0]= a;
|
|
s->sprite_delta[1][0][1]= 0;
|
|
s->sprite_delta[1][1][0]= 0;
|
|
s->sprite_delta[1][1][1]= a;
|
|
s->sprite_shift[0][0]= 0;
|
|
s->sprite_shift[0][1]= 0;
|
|
s->sprite_shift[1][0]= 0;
|
|
s->sprite_shift[1][1]= 0;
|
|
break;
|
|
case 1: //GMC only
|
|
s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0];
|
|
s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1];
|
|
s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2);
|
|
s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2);
|
|
s->sprite_delta[0][0][0]= a;
|
|
s->sprite_delta[0][0][1]= 0;
|
|
s->sprite_delta[0][1][0]= 0;
|
|
s->sprite_delta[0][1][1]= a;
|
|
s->sprite_delta[1][0][0]= a;
|
|
s->sprite_delta[1][0][1]= 0;
|
|
s->sprite_delta[1][1][0]= 0;
|
|
s->sprite_delta[1][1][1]= a;
|
|
s->sprite_shift[0][0]= 0;
|
|
s->sprite_shift[0][1]= 0;
|
|
s->sprite_shift[1][0]= 0;
|
|
s->sprite_shift[1][1]= 0;
|
|
break;
|
|
case 2:
|
|
case 3: //FIXME
|
|
s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho))
|
|
+ ((-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0])
|
|
+( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1]));
|
|
s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho))
|
|
+ ((-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0])
|
|
+(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1]));
|
|
s->sprite_offset[1][0]= ((-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1)
|
|
+( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1)
|
|
+2*w2*r*sprite_ref[0][0] - 16*w2);
|
|
s->sprite_offset[1][1]= ((-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1)
|
|
+(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1)
|
|
+2*w2*r*sprite_ref[0][1] - 16*w2);
|
|
s->sprite_delta[0][0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
|
|
s->sprite_delta[0][0][1]= ( r*sprite_ref[0][1] - virtual_ref[0][1]);
|
|
s->sprite_delta[0][1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]);
|
|
s->sprite_delta[0][1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
|
|
s->sprite_delta[1][0][0]= 4*(-r*sprite_ref[0][0] + virtual_ref[0][0]);
|
|
s->sprite_delta[1][0][1]= 4*( r*sprite_ref[0][1] - virtual_ref[0][1]);
|
|
s->sprite_delta[1][1][0]= 4*(-r*sprite_ref[0][1] + virtual_ref[0][1]);
|
|
s->sprite_delta[1][1][1]= 4*(-r*sprite_ref[0][0] + virtual_ref[0][0]);
|
|
s->sprite_shift[0][0]= alpha+rho;
|
|
s->sprite_shift[0][1]= alpha+rho;
|
|
s->sprite_shift[1][0]= alpha+rho+2;
|
|
s->sprite_shift[1][1]= alpha+rho+2;
|
|
break;
|
|
// case 3:
|
|
break;
|
|
}
|
|
/*printf("%d %d\n", s->sprite_delta[0][0][0], a<<s->sprite_shift[0][0]);
|
|
printf("%d %d\n", s->sprite_delta[0][0][1], 0);
|
|
printf("%d %d\n", s->sprite_delta[0][1][0], 0);
|
|
printf("%d %d\n", s->sprite_delta[0][1][1], a<<s->sprite_shift[0][1]);
|
|
printf("%d %d\n", s->sprite_delta[1][0][0], a<<s->sprite_shift[1][0]);
|
|
printf("%d %d\n", s->sprite_delta[1][0][1], 0);
|
|
printf("%d %d\n", s->sprite_delta[1][1][0], 0);
|
|
printf("%d %d\n", s->sprite_delta[1][1][1], a<<s->sprite_shift[1][1]);*/
|
|
/* try to simplify the situation */
|
|
if( s->sprite_delta[0][0][0] == a<<s->sprite_shift[0][0]
|
|
&& s->sprite_delta[0][0][1] == 0
|
|
&& s->sprite_delta[0][1][0] == 0
|
|
&& s->sprite_delta[0][1][1] == a<<s->sprite_shift[0][1]
|
|
&& s->sprite_delta[1][0][0] == a<<s->sprite_shift[1][0]
|
|
&& s->sprite_delta[1][0][1] == 0
|
|
&& s->sprite_delta[1][1][0] == 0
|
|
&& s->sprite_delta[1][1][1] == a<<s->sprite_shift[1][1])
|
|
{
|
|
s->sprite_offset[0][0]>>=s->sprite_shift[0][0];
|
|
s->sprite_offset[0][1]>>=s->sprite_shift[0][1];
|
|
s->sprite_offset[1][0]>>=s->sprite_shift[1][0];
|
|
s->sprite_offset[1][1]>>=s->sprite_shift[1][1];
|
|
s->sprite_delta[0][0][0]= a;
|
|
s->sprite_delta[0][0][1]= 0;
|
|
s->sprite_delta[0][1][0]= 0;
|
|
s->sprite_delta[0][1][1]= a;
|
|
s->sprite_delta[1][0][0]= a;
|
|
s->sprite_delta[1][0][1]= 0;
|
|
s->sprite_delta[1][1][0]= 0;
|
|
s->sprite_delta[1][1][1]= a;
|
|
s->sprite_shift[0][0]= 0;
|
|
s->sprite_shift[0][1]= 0;
|
|
s->sprite_shift[1][0]= 0;
|
|
s->sprite_shift[1][1]= 0;
|
|
s->real_sprite_warping_points=1;
|
|
}
|
|
else
|
|
s->real_sprite_warping_points= s->num_sprite_warping_points;
|
|
|
|
//printf("%d %d %d %d\n", d[0][0], d[0][1], s->sprite_offset[0][0], s->sprite_offset[0][1]);
|
|
}
|
|
|
|
/* decode mpeg4 VOP header */
|
|
int mpeg4_decode_picture_header(MpegEncContext * s)
|
|
{
|
|
int time_incr, startcode, state, v;
|
|
int time_increment;
|
|
|
|
redo:
|
|
/* search next start code */
|
|
align_get_bits(&s->gb);
|
|
state = 0xff;
|
|
for(;;) {
|
|
v = get_bits(&s->gb, 8);
|
|
if (state == 0x000001) {
|
|
state = ((state << 8) | v) & 0xffffff;
|
|
startcode = state;
|
|
break;
|
|
}
|
|
state = ((state << 8) | v) & 0xffffff;
|
|
if( get_bits_count(&s->gb) > s->gb.size*8-32){
|
|
if(s->gb.size>50){
|
|
printf("no VOP startcode found, frame size was=%d\n", s->gb.size);
|
|
return -1;
|
|
}else{
|
|
printf("frame skip\n");
|
|
return FRAME_SKIPED;
|
|
}
|
|
}
|
|
}
|
|
//printf("startcode %X %d\n", startcode, get_bits_count(&s->gb));
|
|
if (startcode == 0x120) { // Video Object Layer
|
|
int width, height, vo_ver_id;
|
|
|
|
/* vol header */
|
|
skip_bits(&s->gb, 1); /* random access */
|
|
s->vo_type= get_bits(&s->gb, 8);
|
|
if (get_bits1(&s->gb) != 0) { /* is_ol_id */
|
|
vo_ver_id = get_bits(&s->gb, 4); /* vo_ver_id */
|
|
skip_bits(&s->gb, 3); /* vo_priority */
|
|
} else {
|
|
vo_ver_id = 1;
|
|
}
|
|
//printf("vo type:%d\n",s->vo_type);
|
|
s->aspect_ratio_info= get_bits(&s->gb, 4);
|
|
if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){
|
|
s->aspected_width = get_bits(&s->gb, 8); // par_width
|
|
s->aspected_height = get_bits(&s->gb, 8); // par_height
|
|
}
|
|
|
|
if ((s->vol_control_parameters=get_bits1(&s->gb))) { /* vol control parameter */
|
|
int chroma_format= get_bits(&s->gb, 2);
|
|
if(chroma_format!=1){
|
|
printf("illegal chroma format\n");
|
|
}
|
|
s->low_delay= get_bits1(&s->gb);
|
|
if(get_bits1(&s->gb)){ /* vbv parameters */
|
|
get_bits(&s->gb, 15); /* first_half_bitrate */
|
|
skip_bits1(&s->gb); /* marker */
|
|
get_bits(&s->gb, 15); /* latter_half_bitrate */
|
|
skip_bits1(&s->gb); /* marker */
|
|
get_bits(&s->gb, 15); /* first_half_vbv_buffer_size */
|
|
skip_bits1(&s->gb); /* marker */
|
|
get_bits(&s->gb, 3); /* latter_half_vbv_buffer_size */
|
|
get_bits(&s->gb, 11); /* first_half_vbv_occupancy */
|
|
skip_bits1(&s->gb); /* marker */
|
|
get_bits(&s->gb, 15); /* latter_half_vbv_occupancy */
|
|
skip_bits1(&s->gb); /* marker */
|
|
}
|
|
}else{
|
|
// set low delay flag only once so the smart? low delay detection wont be overriden
|
|
if(s->picture_number==0)
|
|
s->low_delay=0;
|
|
}
|
|
|
|
s->shape = get_bits(&s->gb, 2); /* vol shape */
|
|
if(s->shape != RECT_SHAPE) printf("only rectangular vol supported\n");
|
|
if(s->shape == GRAY_SHAPE && vo_ver_id != 1){
|
|
printf("Gray shape not supported\n");
|
|
skip_bits(&s->gb, 4); //video_object_layer_shape_extension
|
|
}
|
|
|
|
skip_bits1(&s->gb); /* marker */
|
|
|
|
s->time_increment_resolution = get_bits(&s->gb, 16);
|
|
|
|
s->time_increment_bits = av_log2(s->time_increment_resolution - 1) + 1;
|
|
if (s->time_increment_bits < 1)
|
|
s->time_increment_bits = 1;
|
|
skip_bits1(&s->gb); /* marker */
|
|
|
|
if (get_bits1(&s->gb) != 0) { /* fixed_vop_rate */
|
|
skip_bits(&s->gb, s->time_increment_bits);
|
|
}
|
|
|
|
if (s->shape != BIN_ONLY_SHAPE) {
|
|
if (s->shape == RECT_SHAPE) {
|
|
skip_bits1(&s->gb); /* marker */
|
|
width = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
height = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
if(width && height){ /* they should be non zero but who knows ... */
|
|
s->width = width;
|
|
s->height = height;
|
|
// printf("width/height: %d %d\n", width, height);
|
|
}
|
|
}
|
|
|
|
s->progressive_sequence= get_bits1(&s->gb)^1;
|
|
if(!get_bits1(&s->gb)) printf("OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */
|
|
if (vo_ver_id == 1) {
|
|
s->vol_sprite_usage = get_bits1(&s->gb); /* vol_sprite_usage */
|
|
} else {
|
|
s->vol_sprite_usage = get_bits(&s->gb, 2); /* vol_sprite_usage */
|
|
}
|
|
if(s->vol_sprite_usage==STATIC_SPRITE) printf("Static Sprites not supported\n");
|
|
if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){
|
|
if(s->vol_sprite_usage==STATIC_SPRITE){
|
|
s->sprite_width = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
s->sprite_height= get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
s->sprite_left = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
s->sprite_top = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
}
|
|
s->num_sprite_warping_points= get_bits(&s->gb, 6);
|
|
s->sprite_warping_accuracy = get_bits(&s->gb, 2);
|
|
s->sprite_brightness_change= get_bits1(&s->gb);
|
|
if(s->vol_sprite_usage==STATIC_SPRITE)
|
|
s->low_latency_sprite= get_bits1(&s->gb);
|
|
}
|
|
// FIXME sadct disable bit if verid!=1 && shape not rect
|
|
|
|
if (get_bits1(&s->gb) == 1) { /* not_8_bit */
|
|
s->quant_precision = get_bits(&s->gb, 4); /* quant_precision */
|
|
if(get_bits(&s->gb, 4)!=8) printf("N-bit not supported\n"); /* bits_per_pixel */
|
|
if(s->quant_precision!=5) printf("quant precission %d\n", s->quant_precision);
|
|
} else {
|
|
s->quant_precision = 5;
|
|
}
|
|
|
|
// FIXME a bunch of grayscale shape things
|
|
|
|
if((s->mpeg_quant=get_bits1(&s->gb))){ /* vol_quant_type */
|
|
int i, j, v;
|
|
|
|
/* load default matrixes */
|
|
for(i=0; i<64; i++){
|
|
v= ff_mpeg4_default_intra_matrix[i];
|
|
s->intra_matrix[i]= v;
|
|
s->chroma_intra_matrix[i]= v;
|
|
|
|
v= ff_mpeg4_default_non_intra_matrix[i];
|
|
s->inter_matrix[i]= v;
|
|
s->chroma_inter_matrix[i]= v;
|
|
}
|
|
|
|
/* load custom intra matrix */
|
|
if(get_bits1(&s->gb)){
|
|
for(i=0; i<64; i++){
|
|
v= get_bits(&s->gb, 8);
|
|
if(v==0) break;
|
|
|
|
j= zigzag_direct[i];
|
|
s->intra_matrix[j]= v;
|
|
s->chroma_intra_matrix[j]= v;
|
|
}
|
|
}
|
|
|
|
/* load custom non intra matrix */
|
|
if(get_bits1(&s->gb)){
|
|
for(i=0; i<64; i++){
|
|
v= get_bits(&s->gb, 8);
|
|
if(v==0) break;
|
|
|
|
j= zigzag_direct[i];
|
|
s->inter_matrix[j]= v;
|
|
s->chroma_inter_matrix[j]= v;
|
|
}
|
|
|
|
/* replicate last value */
|
|
for(; i<64; i++){
|
|
j= zigzag_direct[i];
|
|
s->inter_matrix[j]= v;
|
|
s->chroma_inter_matrix[j]= v;
|
|
}
|
|
}
|
|
|
|
// FIXME a bunch of grayscale shape things
|
|
}
|
|
|
|
if(vo_ver_id != 1)
|
|
s->quarter_sample= get_bits1(&s->gb);
|
|
else s->quarter_sample=0;
|
|
|
|
if(!get_bits1(&s->gb)) printf("Complexity estimation not supported\n");
|
|
|
|
s->resync_marker= !get_bits1(&s->gb); /* resync_marker_disabled */
|
|
|
|
s->data_partitioning= get_bits1(&s->gb);
|
|
if(s->data_partitioning){
|
|
s->rvlc= get_bits1(&s->gb);
|
|
if(s->rvlc){
|
|
printf("reversible vlc not supported\n");
|
|
}
|
|
}
|
|
|
|
if(vo_ver_id != 1) {
|
|
s->new_pred= get_bits1(&s->gb);
|
|
if(s->new_pred){
|
|
printf("new pred not supported\n");
|
|
skip_bits(&s->gb, 2); /* requested upstream message type */
|
|
skip_bits1(&s->gb); /* newpred segment type */
|
|
}
|
|
s->reduced_res_vop= get_bits1(&s->gb);
|
|
if(s->reduced_res_vop) printf("reduced resolution VOP not supported\n");
|
|
}
|
|
else{
|
|
s->new_pred=0;
|
|
s->reduced_res_vop= 0;
|
|
}
|
|
|
|
s->scalability= get_bits1(&s->gb);
|
|
if(s->workaround_bugs==1) s->scalability=0;
|
|
if (s->scalability) {
|
|
int dummy= s->hierachy_type= get_bits1(&s->gb);
|
|
int ref_layer_id= get_bits(&s->gb, 4);
|
|
int ref_layer_sampling_dir= get_bits1(&s->gb);
|
|
int h_sampling_factor_n= get_bits(&s->gb, 5);
|
|
int h_sampling_factor_m= get_bits(&s->gb, 5);
|
|
int v_sampling_factor_n= get_bits(&s->gb, 5);
|
|
int v_sampling_factor_m= get_bits(&s->gb, 5);
|
|
s->enhancement_type= get_bits1(&s->gb);
|
|
// bin shape stuff FIXME
|
|
printf("scalability not supported\n");
|
|
}
|
|
}
|
|
//printf("end Data %X %d\n", show_bits(&s->gb, 32), get_bits_count(&s->gb)&0x7);
|
|
goto redo;
|
|
} else if (startcode == 0x1b2) { //userdata
|
|
char buf[256];
|
|
int i;
|
|
int e;
|
|
int ver, build;
|
|
|
|
//printf("user Data %X\n", show_bits(&s->gb, 32));
|
|
buf[0]= show_bits(&s->gb, 8);
|
|
for(i=1; i<256; i++){
|
|
buf[i]= show_bits(&s->gb, 16)&0xFF;
|
|
if(buf[i]==0) break;
|
|
skip_bits(&s->gb, 8);
|
|
}
|
|
buf[255]=0;
|
|
e=sscanf(buf, "DivX%dBuild%d", &ver, &build);
|
|
if(e!=2)
|
|
e=sscanf(buf, "DivX%db%d", &ver, &build);
|
|
if(e==2){
|
|
s->divx_version= ver;
|
|
s->divx_build= build;
|
|
if(s->picture_number==0){
|
|
printf("This file was encoded with DivX%d Build%d\n", ver, build);
|
|
if(ver==500 && build==413){
|
|
printf("WARNING: this version of DivX is not MPEG4 compatible, trying to workaround these bugs...\n");
|
|
}
|
|
}
|
|
}
|
|
//printf("User Data: %s\n", buf);
|
|
goto redo;
|
|
} else if (startcode != 0x1b6) { //VOP
|
|
goto redo;
|
|
}
|
|
|
|
s->pict_type = get_bits(&s->gb, 2) + I_TYPE; /* pict type: I = 0 , P = 1 */
|
|
//if(s->pict_type!=I_TYPE) return FRAME_SKIPED;
|
|
if(s->pict_type==B_TYPE && s->low_delay && s->vol_control_parameters==0){
|
|
printf("low_delay flag set, but shouldnt, clearing it\n");
|
|
s->low_delay=0;
|
|
}
|
|
// printf("pic: %d, qpel:%d part:%d resync:%d\n", s->pict_type, s->quarter_sample, s->data_partitioning, s->resync_marker);
|
|
|
|
if(s->time_increment_resolution==0){
|
|
s->time_increment_resolution=1;
|
|
// fprintf(stderr, "time_increment_resolution is illegal\n");
|
|
}
|
|
time_incr=0;
|
|
while (get_bits1(&s->gb) != 0)
|
|
time_incr++;
|
|
|
|
check_marker(&s->gb, "before time_increment");
|
|
time_increment= get_bits(&s->gb, s->time_increment_bits);
|
|
//printf(" type:%d incr:%d increment:%d\n", s->pict_type, time_incr, time_increment);
|
|
if(s->pict_type!=B_TYPE){
|
|
s->last_time_base= s->time_base;
|
|
s->time_base+= time_incr;
|
|
s->time= s->time_base*s->time_increment_resolution + time_increment;
|
|
if(s->time < s->last_non_b_time && s->workaround_bugs==3){
|
|
fprintf(stderr, "header is not mpeg4 compatible, broken encoder, trying to workaround\n");
|
|
s->time_base++;
|
|
s->time+= s->time_increment_resolution;
|
|
}
|
|
s->pp_time= s->time - s->last_non_b_time;
|
|
s->last_non_b_time= s->time;
|
|
}else{
|
|
s->time= (s->last_time_base + time_incr)*s->time_increment_resolution + time_increment;
|
|
s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
|
|
if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
|
|
// printf("messed up order, seeking?, skiping current b frame\n");
|
|
return FRAME_SKIPED;
|
|
}
|
|
|
|
if(s->t_frame==0) s->t_frame= s->time - s->last_time_base;
|
|
if(s->t_frame==0) s->t_frame=1; // 1/0 protection
|
|
//printf("%Ld %Ld %d %d\n", s->last_non_b_time, s->time, s->pp_time, s->t_frame); fflush(stdout);
|
|
s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame)
|
|
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
|
|
s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame)
|
|
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
|
|
}
|
|
|
|
s->avctx->pts= s->time*1000LL*1000LL / s->time_increment_resolution;
|
|
|
|
if(check_marker(&s->gb, "before vop_coded")==0 && s->picture_number==0){
|
|
printf("hmm, seems the headers arnt complete, trying to guess time_increment_bits\n");
|
|
for(s->time_increment_bits++ ;s->time_increment_bits<16; s->time_increment_bits++){
|
|
if(get_bits1(&s->gb)) break;
|
|
}
|
|
printf("my guess is %d bits ;)\n",s->time_increment_bits);
|
|
}
|
|
/* vop coded */
|
|
if (get_bits1(&s->gb) != 1)
|
|
goto redo;
|
|
//printf("time %d %d %d || %Ld %Ld %Ld\n", s->time_increment_bits, s->time_increment_resolution, s->time_base,
|
|
//s->time, s->last_non_b_time, s->last_non_b_time - s->pp_time);
|
|
if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE
|
|
|| (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) {
|
|
/* rounding type for motion estimation */
|
|
s->no_rounding = get_bits1(&s->gb);
|
|
} else {
|
|
s->no_rounding = 0;
|
|
}
|
|
//FIXME reduced res stuff
|
|
|
|
if (s->shape != RECT_SHAPE) {
|
|
if (s->vol_sprite_usage != 1 || s->pict_type != I_TYPE) {
|
|
int width, height, hor_spat_ref, ver_spat_ref;
|
|
|
|
width = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
height = get_bits(&s->gb, 13);
|
|
skip_bits1(&s->gb); /* marker */
|
|
hor_spat_ref = get_bits(&s->gb, 13); /* hor_spat_ref */
|
|
skip_bits1(&s->gb); /* marker */
|
|
ver_spat_ref = get_bits(&s->gb, 13); /* ver_spat_ref */
|
|
}
|
|
skip_bits1(&s->gb); /* change_CR_disable */
|
|
|
|
if (get_bits1(&s->gb) != 0) {
|
|
skip_bits(&s->gb, 8); /* constant_alpha_value */
|
|
}
|
|
}
|
|
//FIXME complexity estimation stuff
|
|
|
|
if (s->shape != BIN_ONLY_SHAPE) {
|
|
int t;
|
|
t=get_bits(&s->gb, 3); /* intra dc VLC threshold */
|
|
//printf("threshold %d\n", t);
|
|
if(!s->progressive_sequence){
|
|
s->top_field_first= get_bits1(&s->gb);
|
|
s->alternate_scan= get_bits1(&s->gb);
|
|
}else
|
|
s->alternate_scan= 0;
|
|
}
|
|
|
|
if(s->pict_type == S_TYPE && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){
|
|
if(s->num_sprite_warping_points){
|
|
mpeg4_decode_sprite_trajectory(s);
|
|
}
|
|
if(s->sprite_brightness_change) printf("sprite_brightness_change not supported\n");
|
|
if(s->vol_sprite_usage==STATIC_SPRITE) printf("static sprite not supported\n");
|
|
}
|
|
|
|
if (s->shape != BIN_ONLY_SHAPE) {
|
|
/* note: we do not use quant_precision to avoid problem if no
|
|
MPEG4 vol header as it is found on some old opendivx
|
|
movies */
|
|
s->qscale = get_bits(&s->gb, 5);
|
|
if(s->qscale==0){
|
|
printf("Error, header damaged or not MPEG4 header (qscale=0)\n");
|
|
return -1; // makes no sense to continue, as there is nothing left from the image then
|
|
}
|
|
|
|
if (s->pict_type != I_TYPE) {
|
|
s->f_code = get_bits(&s->gb, 3); /* fcode_for */
|
|
if(s->f_code==0){
|
|
printf("Error, header damaged or not MPEG4 header (f_code=0)\n");
|
|
return -1; // makes no sense to continue, as the MV decoding will break very quickly
|
|
}
|
|
}else
|
|
s->f_code=1;
|
|
|
|
if (s->pict_type == B_TYPE) {
|
|
s->b_code = get_bits(&s->gb, 3);
|
|
}else
|
|
s->b_code=1;
|
|
#if 0
|
|
printf("qp:%d fc:%d bc:%d type:%s size:%d pro:%d alt:%d top:%d qpel:%d part:%d resync:%d\n",
|
|
s->qscale, s->f_code, s->b_code,
|
|
s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
|
|
s->gb.size,s->progressive_sequence, s->alternate_scan, s->top_field_first,
|
|
s->quarter_sample, s->data_partitioning, s->resync_marker);
|
|
#endif
|
|
if(!s->scalability){
|
|
if (s->shape!=RECT_SHAPE && s->pict_type!=I_TYPE) {
|
|
skip_bits1(&s->gb); // vop shape coding type
|
|
}
|
|
}else{
|
|
if(s->enhancement_type){
|
|
int load_backward_shape= get_bits1(&s->gb);
|
|
if(load_backward_shape){
|
|
printf("load backward shape isnt supported\n");
|
|
}
|
|
}
|
|
skip_bits(&s->gb, 2); //ref_select_code
|
|
}
|
|
}
|
|
/* detect buggy encoders which dont set the low_delay flag (divx4/xvid/opendivx)*/
|
|
// note we cannot detect divx5 without b-frames easyly (allthough its buggy too)
|
|
if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==0 && s->picture_number==0){
|
|
printf("looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
|
|
s->low_delay=1;
|
|
}
|
|
|
|
s->picture_number++; // better than pic number==0 allways ;)
|
|
|
|
s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support
|
|
s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
|
|
|
|
if(s->divx_version==0 || s->divx_version < 500){
|
|
s->h_edge_pos= s->width;
|
|
s->v_edge_pos= s->height;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* don't understand why they choose a different header ! */
|
|
int intel_h263_decode_picture_header(MpegEncContext *s)
|
|
{
|
|
int format;
|
|
|
|
/* picture header */
|
|
if (get_bits(&s->gb, 22) != 0x20) {
|
|
fprintf(stderr, "Bad picture start code\n");
|
|
return -1;
|
|
}
|
|
s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
|
|
|
|
if (get_bits1(&s->gb) != 1) {
|
|
fprintf(stderr, "Bad marker\n");
|
|
return -1; /* marker */
|
|
}
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "Bad H263 id\n");
|
|
return -1; /* h263 id */
|
|
}
|
|
skip_bits1(&s->gb); /* split screen off */
|
|
skip_bits1(&s->gb); /* camera off */
|
|
skip_bits1(&s->gb); /* freeze picture release off */
|
|
|
|
format = get_bits(&s->gb, 3);
|
|
if (format != 7) {
|
|
fprintf(stderr, "Intel H263 free format not supported\n");
|
|
return -1;
|
|
}
|
|
s->h263_plus = 0;
|
|
|
|
s->pict_type = I_TYPE + get_bits1(&s->gb);
|
|
|
|
s->unrestricted_mv = get_bits1(&s->gb);
|
|
s->h263_long_vectors = s->unrestricted_mv;
|
|
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "SAC not supported\n");
|
|
return -1; /* SAC: off */
|
|
}
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "Advanced Prediction Mode not supported\n");
|
|
return -1; /* advanced prediction mode: off */
|
|
}
|
|
if (get_bits1(&s->gb) != 0) {
|
|
fprintf(stderr, "PB frame mode no supported\n");
|
|
return -1; /* PB frame mode */
|
|
}
|
|
|
|
/* skip unknown header garbage */
|
|
skip_bits(&s->gb, 41);
|
|
|
|
s->qscale = get_bits(&s->gb, 5);
|
|
skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
|
|
|
|
/* PEI */
|
|
while (get_bits1(&s->gb) != 0) {
|
|
skip_bits(&s->gb, 8);
|
|
}
|
|
s->f_code = 1;
|
|
return 0;
|
|
}
|
|
|