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- Advanced Intra Coding (AIC) support for H.263+ encoder, just DC by now.

Browse Source 
- Bug fix H.263+ AIC tables.
- Warning fixes.

Originally committed as revision 431 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Juanjo 2002-05-02 04:39:45 +00:00
parent 95c79a24e5
commit ef5b1b5a7e
8 changed files with 254 additions and 110 deletions
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214
libavcodec/h263.c
View File

@ -46,6 +46,7 @@ static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
int n, int coded);
static int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
int n, int coded);
static int h263_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr);
static inline int mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr);
static void mpeg4_inv_pred_ac(MpegEncContext * s, INT16 *block, int n,
int dir);
@ -128,7 +129,7 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
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,1,0); /* Advanced Intra Coding: 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 */
@ -142,7 +143,11 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */
put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */
put_bits(&s->pb,1,0); /* Rounding Type */
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 */
@ -539,10 +544,13 @@ void h263_encode_mb(MpegEncContext * s,
int motion_x, int motion_y)
{
int cbpc, cbpy, i, cbp, pred_x, pred_y;
// printf("**mb x=%d y=%d\n", s->mb_x, s->mb_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 */
/* compute cbp */
cbp = 0;
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 0)
@ -553,16 +561,16 @@ void h263_encode_mb(MpegEncContext * s,
put_bits(&s->pb, 1, 1);
return;
}
put_bits(&s->pb, 1, 0); /* mb coded */
put_bits(&s->pb, 1, 0); /* mb coded */
cbpc = cbp & 3;
put_bits(&s->pb,
inter_MCBPC_bits[cbpc],
inter_MCBPC_code[cbpc]);
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 */
/* motion vectors: 16x16 mode only now */
h263_pred_motion(s, 0, &pred_x, &pred_y);
if (!s->umvplus) {
@ -573,42 +581,132 @@ void h263_encode_mb(MpegEncContext * s,
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 */
/* To prevent Start Code emulation */
put_bits(&s->pb,1,1);
}
} else {
/* compute cbp */
cbp = 0;
for (i = 0; i < 6; i++) {
if (s->block_last_index[i] >= 1)
cbp |= 1 << (5 - i);
}
} 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_pred) {
/* 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]);
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]);
}
/* encode each block */
for (i = 0; i < 6; i++) {
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_gob_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;
@ -640,6 +738,9 @@ void h263_pred_acdc(MpegEncContext * s, INT16 *block, int n)
a = dc_val[(x - 1) + (y) * wrap];
c = dc_val[(x) + (y - 1) * wrap];
/* No prediction outside GOB boundary */
if (s->first_gob_line && ((n < 2) || (n > 3)))
c = 1024;
pred_dc = 1024;
if (s->ac_pred) {
if (s->h263_aic_dir) {
@ -898,6 +999,7 @@ void h263_encode_init(MpegEncContext *s)
init_rl(&rl_inter);
init_rl(&rl_intra);
init_rl(&rl_intra_aic);
init_mv_penalty_and_fcode(s);
}
@ -928,11 +1030,11 @@ void h263_encode_init(MpegEncContext *s)
static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
{
int level, run, last, i, j, last_index, last_non_zero, sign, slevel;
int code;
RLTable *rl = &rl_inter;
int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
RLTable *rl;
if (s->mb_intra) {
rl = &rl_inter;
if (s->mb_intra && !s->h263_aic) {
/* DC coef */
level = block[0];
/* 255 cannot be represented, so we clamp */
@ -952,23 +1054,25 @@ static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
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;
}
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) {
@ -978,8 +1082,8 @@ static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
} else {
put_bits(&s->pb, 1, sign);
}
last_non_zero = i;
}
last_non_zero = i;
}
}
}
@ -2628,7 +2732,7 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
skip_bits(&s->gb, 8); // par_height
}
if(vol_control=get_bits1(&s->gb)){ /* vol control parameter */
if ((vol_control=get_bits1(&s->gb))) { /* vol control parameter */
int chroma_format= get_bits(&s->gb, 2);
if(chroma_format!=1){
printf("illegal chroma format\n");

93
libavcodec/h263data.h
View File

@ -125,45 +125,73 @@ static RLTable rl_inter = {
inter_level,
};
/* table used for Advanced INTRA Coding, just RUN and LEVEL change */
const INT8 inter_level_aic[102] = {
1, 1, 1, 1, 1, 1, 1, 1,
1, 3, 2, 1, 2, 2, 4, 5,
6, 7, 3, 2, 3, 4, 5, 2,
3, 4, 2, 3, 1, 2, 25, 1,
2, 24, 8, 2, 7, 4, 6, 1,
9, 23, 2, 3, 1, 10, 12, 11,
18, 17, 16, 15, 14, 13, 20, 19,
22, 21, 1, 1, 1, 1, 1, 1,
1, 2, 1, 1, 1, 3, 1, 1,
1, 1, 1, 1, 1, 4, 1, 1,
1, 1, 2, 2, 6, 5, 2, 2,
3, 7, 3, 4, 9, 8, 1, 1,
1, 2, 2, 2, 3, 10,
const UINT16 intra_vlc_aic[103][2] = {
{ 0x2, 2 }, { 0x6, 3 }, { 0xe, 4 }, { 0xc, 5 },
{ 0xd, 5 }, { 0x10, 6 }, { 0x11, 6 }, { 0x12, 6 },
{ 0x16, 7 }, { 0x1b, 8 }, { 0x20, 9 }, { 0x21, 9 },
{ 0x1a, 9 }, { 0x1b, 9 }, { 0x1c, 9 }, { 0x1d, 9 },
{ 0x1e, 9 }, { 0x1f, 9 }, { 0x23, 11 }, { 0x22, 11 },
{ 0x57, 12 }, { 0x56, 12 }, { 0x55, 12 }, { 0x54, 12 },
{ 0x53, 12 }, { 0xf, 4 }, { 0x14, 6 }, { 0x14, 7 },
{ 0x1e, 8 }, { 0xf, 10 }, { 0x21, 11 }, { 0x50, 12 },
{ 0xb, 5 }, { 0x15, 7 }, { 0xe, 10 }, { 0x9, 10 },
{ 0x15, 6 }, { 0x1d, 8 }, { 0xd, 10 }, { 0x51, 12 },
{ 0x13, 6 }, { 0x23, 9 }, { 0x7, 11 }, { 0x17, 7 },
{ 0x22, 9 }, { 0x52, 12 }, { 0x1c, 8 }, { 0xc, 10 },
{ 0x1f, 8 }, { 0xb, 10 }, { 0x25, 9 }, { 0xa, 10 },
{ 0x24, 9 }, { 0x6, 11 }, { 0x21, 10 }, { 0x20, 10 },
{ 0x8, 10 }, { 0x20, 11 }, { 0x7, 4 }, { 0xc, 6 },
{ 0x10, 7 }, { 0x13, 8 }, { 0x11, 9 }, { 0x12, 9 },
{ 0x4, 10 }, { 0x27, 11 }, { 0x26, 11 }, { 0x5f, 12 },
{ 0xf, 6 }, { 0x13, 9 }, { 0x5, 10 }, { 0x25, 11 },
{ 0xe, 6 }, { 0x14, 9 }, { 0x24, 11 }, { 0xd, 6 },
{ 0x6, 10 }, { 0x5e, 12 }, { 0x11, 7 }, { 0x7, 10 },
{ 0x13, 7 }, { 0x5d, 12 }, { 0x12, 7 }, { 0x5c, 12 },
{ 0x14, 8 }, { 0x5b, 12 }, { 0x15, 8 }, { 0x1a, 8 },
{ 0x19, 8 }, { 0x18, 8 }, { 0x17, 8 }, { 0x16, 8 },
{ 0x19, 9 }, { 0x15, 9 }, { 0x16, 9 }, { 0x18, 9 },
{ 0x17, 9 }, { 0x4, 11 }, { 0x5, 11 }, { 0x58, 12 },
{ 0x59, 12 }, { 0x5a, 12 }, { 0x3, 7 },
};
const INT8 inter_run_aic[102] = {
0, 1, 3, 5, 7, 8, 9, 10,
11, 4, 9, 13, 0, 1, 1, 1,
1, 1, 0, 3, 2, 3, 0, 4,
3, 0, 5, 5, 2, 6, 0, 4,
7, 0, 0, 8, 0, 2, 0, 12,
0, 0, 2, 1, 6, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 14, 20, 1, 19, 2,
3, 0, 5, 6, 4, 0, 9, 10,
11, 12, 13, 8, 7, 0, 17, 18,
16, 15, 2, 1, 0, 0, 4, 3,
1, 0, 2, 1, 0, 0, 21, 22,
23, 7, 6, 5, 3, 0,
const INT8 intra_run_aic[102] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 3, 3, 3, 3,
4, 4, 4, 5, 5, 5, 6, 6,
7, 7, 8, 8, 9, 9, 10, 11,
12, 13, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 1, 1, 1,
2, 2, 2, 3, 3, 3, 4, 4,
5, 5, 6, 6, 7, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23,
};
const INT8 intra_level_aic[102] = {
1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24,
25, 1, 2, 3, 4, 5, 6, 7,
1, 2, 3, 4, 1, 2, 3, 4,
1, 2, 3, 1, 2, 3, 1, 2,
1, 2, 1, 2, 1, 2, 1, 1,
1, 1, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 1, 2, 3, 4,
1, 2, 3, 1, 2, 3, 1, 2,
1, 2, 1, 2, 1, 2, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1,
};
static RLTable rl_intra_aic = {
102,
58,
inter_vlc,
inter_run_aic,
inter_level_aic,
intra_vlc_aic,
intra_run_aic,
intra_level_aic,
};
static const UINT16 h263_format[8][2] = {
@ -174,4 +202,3 @@ static const UINT16 h263_format[8][2] = {
{ 704, 576 },
{ 1408, 1152 },
};

1
libavcodec/h263dec.c
View File

@ -28,7 +28,6 @@
static int h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int i;
s->avctx = avctx;
s->out_format = FMT_H263;

12
libavcodec/i386/mpegvideo_mmx.c
View File

@ -557,12 +557,12 @@ void MPV_common_init_mmx(MpegEncContext *s)
s->dct_unquantize_mpeg1 = dct_unquantize_mpeg1_mmx;
s->dct_unquantize_mpeg2 = dct_unquantize_mpeg2_mmx;
draw_edges = draw_edges_mmx;
draw_edges = draw_edges_mmx;
if(mm_flags & MM_MMXEXT){
dct_quantize= dct_quantize_MMX2;
}else{
dct_quantize= dct_quantize_MMX;
}
if(mm_flags & MM_MMXEXT){
dct_quantize= dct_quantize_MMX2;
} else {
dct_quantize= dct_quantize_MMX;
}
}
}

5
libavcodec/i386/mpegvideo_mmx_template.c
View File

@ -48,6 +48,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
else
q = s->c_dc_scale;
/* note: block[0] is assumed to be positive */
if (!s->h263_aic) {
#if 1
asm volatile (
"xorl %%edx, %%edx \n\t"
@ -65,6 +66,10 @@ static int RENAME(dct_quantize)(MpegEncContext *s,
: "%edx"
);
#endif
} else
/* For AIC we skip quant/dequant of INTRADC */
level = block[0];
block[0]=0; //avoid fake overflow
// temp_block[0] = (block[0] + (q >> 1)) / q;
last_non_zero_p1 = 1;

6
libavcodec/i386/simple_idct_mmx.c
View File

@ -32,8 +32,8 @@
#define ROW_SHIFT 11
#define COL_SHIFT 20 // 6
static uint64_t __attribute__((aligned(8))) wm1010= 0xFFFF0000FFFF0000ULL;
static uint64_t __attribute__((aligned(8))) d40000= 0x0000000000040000ULL;
static const uint64_t __attribute__((aligned(8))) wm1010= 0xFFFF0000FFFF0000ULL;
static const uint64_t __attribute__((aligned(8))) d40000= 0x0000000000040000ULL;
static int16_t __attribute__((aligned(8))) temp[64];
static int16_t __attribute__((aligned(8))) coeffs[]= {
1<<(ROW_SHIFT-1), 0, 1<<(ROW_SHIFT-1), 0,
@ -63,12 +63,12 @@ static int16_t __attribute__((aligned(8))) coeffs[]= {
C3, -C1, C3, -C1
};
#if 0
static void unused_var_killer(){
int a= wm1010 + d40000;
temp[0]=a;
}
#if 0
static void inline idctCol (int16_t * col, int16_t *input)
{
#undef C0

32
libavcodec/mpegvideo.c
View File

@ -449,6 +449,7 @@ int MPV_encode_init(AVCodecContext *avctx)
s->rtp_payload_size = 1200;
s->h263_plus = 1;
s->unrestricted_mv = 1;
s->h263_aic = 1;
/* These are just to be sure */
s->umvplus = 0;
@ -542,7 +543,7 @@ int MPV_encode_init(AVCodecContext *avctx)
}
/* precompute matrix */
/* for mjpeg, we do include qscale in the matrix */
/* for mjpeg, we do include qscale in the matrix */
if (s->out_format != FMT_MJPEG) {
convert_matrix(s->q_intra_matrix, s->q_intra_matrix16, s->q_intra_matrix16_bias,
s->intra_matrix, s->intra_quant_bias);
@ -1338,8 +1339,8 @@ static inline void clip_coeffs(MpegEncContext *s, DCTELEM *block, int last_index
int i;
const int maxlevel= s->max_qcoeff;
const int minlevel= s->min_qcoeff;
for(i=0; i<=last_index; i++){
for(i=0;i<=last_index; i++){
const int j = zigzag_direct[i];
int level = block[j];
@ -1441,6 +1442,9 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
/* DCT & quantize */
if (s->h263_pred && s->msmpeg4_version!=2) {
h263_dc_scale(s);
} else if (s->h263_aic) {
s->y_dc_scale = 2*s->qscale;
s->c_dc_scale = 2*s->qscale;
} else {
/* default quantization values */
s->y_dc_scale = 8;
@ -1450,14 +1454,16 @@ static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
for(i=0;i<6;i++) {
int overflow;
s->block_last_index[i] = dct_quantize(s, s->block[i], i, 8, &overflow);
if(overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
if (overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
}
}else{
for(i=0;i<6;i++) {
int overflow;
s->block_last_index[i] = dct_quantize(s, s->block[i], i, s->qscale, &overflow);
// FIXME we could decide to change to quantizer instead of clipping
if(overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
// JS: I don't think that would be a good idea it could lower quality instead
// of improve it. Just INTRADC clipping deserves changes in quantizer
if (overflow) clip_coeffs(s, s->block[i], s->block_last_index[i]);
}
}
@ -2018,12 +2024,16 @@ static int dct_quantize_c(MpegEncContext *s,
block_permute(block);
if (s->mb_intra) {
if (n < 4)
q = s->y_dc_scale;
else
q = s->c_dc_scale;
q = q << 3;
if (!s->h263_aic) {
if (n < 4)
q = s->y_dc_scale;
else
q = s->c_dc_scale;
q = q << 3;
} else
/* For AIC we skip quant/dequant of INTRADC */
q = 1 << 3;
/* note: block[0] is assumed to be positive */
block[0] = (block[0] + (q >> 1)) / q;
i = 1;

1
libavcodec/rv10.c
View File

@ -337,7 +337,6 @@ static int rv10_decode_picture_header(MpegEncContext *s)
static int rv10_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int i;
static int done;
// s->avctx= avctx;