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944721c160
ffmpeg/libavcodec/mjpegenc.c
Aurelien Jacobs 944721c160 add proper prefix to new mjpeg extern func/var 
Originally committed as revision 9049 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-05-17 16:45:55 +00:00

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/*
* MJPEG encoder
* Copyright (c) 2000, 2001 Fabrice Bellard.
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Support for external huffman table, various fixes (AVID workaround),
* aspecting, new decode_frame mechanism and apple mjpeg-b support
* by Alex Beregszaszi
*/
/**
* @file mjpegenc.c
* MJPEG encoder.
*/
//#define DEBUG
#include <assert.h>
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "mjpeg.h"
/* use two quantizer tables (one for luminance and one for chrominance) */
/* not yet working */
#undef TWOMATRIXES
typedef struct MJpegContext {
uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
uint16_t huff_code_dc_luminance[12];
uint8_t huff_size_dc_chrominance[12];
uint16_t huff_code_dc_chrominance[12];
uint8_t huff_size_ac_luminance[256];
uint16_t huff_code_ac_luminance[256];
uint8_t huff_size_ac_chrominance[256];
uint16_t huff_code_ac_chrominance[256];
} MJpegContext;
int mjpeg_init(MpegEncContext *s)
{
MJpegContext *m;
m = av_malloc(sizeof(MJpegContext));
if (!m)
return -1;
s->min_qcoeff=-1023;
s->max_qcoeff= 1023;
/* build all the huffman tables */
ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
m->huff_code_dc_luminance,
ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc_luminance);
ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
m->huff_code_dc_chrominance,
ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc_chrominance);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
m->huff_code_ac_luminance,
ff_mjpeg_bits_ac_luminance,
ff_mjpeg_val_ac_luminance);
ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
m->huff_code_ac_chrominance,
ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance);
s->mjpeg_ctx = m;
return 0;
}
void mjpeg_close(MpegEncContext *s)
{
av_free(s->mjpeg_ctx);
}
/* table_class: 0 = DC coef, 1 = AC coefs */
static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
const uint8_t *bits_table, const uint8_t *value_table)
{
PutBitContext *p = &s->pb;
int n, i;
put_bits(p, 4, table_class);
put_bits(p, 4, table_id);
n = 0;
for(i=1;i<=16;i++) {
n += bits_table[i];
put_bits(p, 8, bits_table[i]);
}
for(i=0;i<n;i++)
put_bits(p, 8, value_table[i]);
return n + 17;
}
static void jpeg_table_header(MpegEncContext *s)
{
PutBitContext *p = &s->pb;
int i, j, size;
uint8_t *ptr;
/* quant matrixes */
put_marker(p, DQT);
#ifdef TWOMATRIXES
put_bits(p, 16, 2 + 2 * (1 + 64));
#else
put_bits(p, 16, 2 + 1 * (1 + 64));
#endif
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 0); /* table 0 */
for(i=0;i<64;i++) {
j = s->intra_scantable.permutated[i];
put_bits(p, 8, s->intra_matrix[j]);
}
#ifdef TWOMATRIXES
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 1); /* table 1 */
for(i=0;i<64;i++) {
j = s->intra_scantable.permutated[i];
put_bits(p, 8, s->chroma_intra_matrix[j]);
}
#endif
/* huffman table */
put_marker(p, DHT);
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
size = 2;
size += put_huffman_table(s, 0, 0, ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc_luminance);
size += put_huffman_table(s, 0, 1, ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc_chrominance);
size += put_huffman_table(s, 1, 0, ff_mjpeg_bits_ac_luminance,
ff_mjpeg_val_ac_luminance);
size += put_huffman_table(s, 1, 1, ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance);
ptr[0] = size >> 8;
ptr[1] = size;
}
static void jpeg_put_comments(MpegEncContext *s)
{
PutBitContext *p = &s->pb;
int size;
uint8_t *ptr;
if (s->aspect_ratio_info /* && !lossless */)
{
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
put_bits(p, 16, 0x0201); /* v 1.02 */
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* comment */
if(!(s->flags & CODEC_FLAG_BITEXACT)){
put_marker(p, COM);
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
ff_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
ptr[0] = size >> 8;
ptr[1] = size;
}
if( s->avctx->pix_fmt == PIX_FMT_YUV420P
||s->avctx->pix_fmt == PIX_FMT_YUV422P
||s->avctx->pix_fmt == PIX_FMT_YUV444P){
put_marker(p, COM);
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
ff_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
ptr[0] = size >> 8;
ptr[1] = size;
}
}
void mjpeg_picture_header(MpegEncContext *s)
{
const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
put_marker(&s->pb, SOI);
jpeg_put_comments(s);
jpeg_table_header(s);
switch(s->avctx->codec_id){
case CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break;
case CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break;
default: assert(0);
}
put_bits(&s->pb, 16, 17);
if(lossless && s->avctx->pix_fmt == PIX_FMT_RGB32)
put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
else
put_bits(&s->pb, 8, 8); /* 8 bits/component */
put_bits(&s->pb, 16, s->height);
put_bits(&s->pb, 16, s->width);
put_bits(&s->pb, 8, 3); /* 3 components */
/* Y component */
put_bits(&s->pb, 8, 1); /* component number */
put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
put_bits(&s->pb, 8, 0); /* select matrix */
/* Cb component */
put_bits(&s->pb, 8, 2); /* component number */
put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
#ifdef TWOMATRIXES
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
#else
put_bits(&s->pb, 8, 0); /* select matrix */
#endif
/* Cr component */
put_bits(&s->pb, 8, 3); /* component number */
put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
#ifdef TWOMATRIXES
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
#else
put_bits(&s->pb, 8, 0); /* select matrix */
#endif
/* scan header */
put_marker(&s->pb, SOS);
put_bits(&s->pb, 16, 12); /* length */
put_bits(&s->pb, 8, 3); /* 3 components */
/* Y component */
put_bits(&s->pb, 8, 1); /* index */
put_bits(&s->pb, 4, 0); /* DC huffman table index */
put_bits(&s->pb, 4, 0); /* AC huffman table index */
/* Cb component */
put_bits(&s->pb, 8, 2); /* index */
put_bits(&s->pb, 4, 1); /* DC huffman table index */
put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
/* Cr component */
put_bits(&s->pb, 8, 3); /* index */
put_bits(&s->pb, 4, 1); /* DC huffman table index */
put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
switch(s->avctx->codec_id){
case CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */
case CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */
default: assert(0);
}
put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
}
static void escape_FF(MpegEncContext *s, int start)
{
int size= put_bits_count(&s->pb) - start*8;
int i, ff_count;
uint8_t *buf= s->pb.buf + start;
int align= (-(size_t)(buf))&3;
assert((size&7) == 0);
size >>= 3;
ff_count=0;
for(i=0; i<size && i<align; i++){
if(buf[i]==0xFF) ff_count++;
}
for(; i<size-15; i+=16){
int acc, v;
v= *(uint32_t*)(&buf[i]);
acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+4]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+8]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+12]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
acc>>=4;
acc+= (acc>>16);
acc+= (acc>>8);
ff_count+= acc&0xFF;
}
for(; i<size; i++){
if(buf[i]==0xFF) ff_count++;
}
if(ff_count==0) return;
/* skip put bits */
for(i=0; i<ff_count-3; i+=4)
put_bits(&s->pb, 32, 0);
put_bits(&s->pb, (ff_count-i)*8, 0);
flush_put_bits(&s->pb);
for(i=size-1; ff_count; i--){
int v= buf[i];
if(v==0xFF){
//printf("%d %d\n", i, ff_count);
buf[i+ff_count]= 0;
ff_count--;
}
buf[i+ff_count]= v;
}
}
void ff_mjpeg_stuffing(PutBitContext * pbc)
{
int length;
length= (-put_bits_count(pbc))&7;
if(length) put_bits(pbc, length, (1<<length)-1);
}
void mjpeg_picture_trailer(MpegEncContext *s)
{
ff_mjpeg_stuffing(&s->pb);
flush_put_bits(&s->pb);
assert((s->header_bits&7)==0);
escape_FF(s, s->header_bits>>3);
put_marker(&s->pb, EOI);
}
static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
uint8_t *huff_size, uint16_t *huff_code)
{
int mant, nbits;
if (val == 0) {
put_bits(&s->pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
nbits= av_log2_16bit(val) + 1;
put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
}
}
static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
{
int mant, nbits, code, i, j;
int component, dc, run, last_index, val;
MJpegContext *m = s->mjpeg_ctx;
uint8_t *huff_size_ac;
uint16_t *huff_code_ac;
/* DC coef */
component = (n <= 3 ? 0 : (n&1) + 1);
dc = block[0]; /* overflow is impossible */
val = dc - s->last_dc[component];
if (n < 4) {
mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
huff_size_ac = m->huff_size_ac_luminance;
huff_code_ac = m->huff_code_ac_luminance;
} else {
mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
huff_size_ac = m->huff_size_ac_chrominance;
huff_code_ac = m->huff_code_ac_chrominance;
}
s->last_dc[component] = dc;
/* AC coefs */
run = 0;
last_index = s->block_last_index[n];
for(i=1;i<=last_index;i++) {
j = s->intra_scantable.permutated[i];
val = block[j];
if (val == 0) {
run++;
} else {
while (run >= 16) {
put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
run -= 16;
}
mant = val;
if (val < 0) {
val = -val;
mant--;
}
nbits= av_log2(val) + 1;
code = (run << 4) | nbits;
put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
run = 0;
}
}
/* output EOB only if not already 64 values */
if (last_index < 63 || run != 0)
put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
}
void mjpeg_encode_mb(MpegEncContext *s,
DCTELEM block[6][64])
{
int i;
for(i=0;i<5;i++) {
encode_block(s, block[i], i);
}
if (s->chroma_format == CHROMA_420) {
encode_block(s, block[5], 5);
} else {
encode_block(s, block[6], 6);
encode_block(s, block[5], 5);
encode_block(s, block[7], 7);
}
}
static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
MpegEncContext * const s = avctx->priv_data;
MJpegContext * const m = s->mjpeg_ctx;
AVFrame *pict = data;
const int width= s->width;
const int height= s->height;
AVFrame * const p= (AVFrame*)&s->current_picture;
const int predictor= avctx->prediction_method+1;
init_put_bits(&s->pb, buf, buf_size);
*p = *pict;
p->pict_type= FF_I_TYPE;
p->key_frame= 1;
mjpeg_picture_header(s);
s->header_bits= put_bits_count(&s->pb);
if(avctx->pix_fmt == PIX_FMT_RGB32){
int x, y, i;
const int linesize= p->linesize[0];
uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
int left[3], top[3], topleft[3];
for(i=0; i<3; i++){
buffer[0][i]= 1 << (9 - 1);
}
for(y = 0; y < height; y++) {
const int modified_predictor= y ? predictor : 1;
uint8_t *ptr = p->data[0] + (linesize * y);
if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for(i=0; i<3; i++){
top[i]= left[i]= topleft[i]= buffer[0][i];
}
for(x = 0; x < width; x++) {
buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
for(i=0;i<3;i++) {
int pred, diff;
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
topleft[i]= top[i];
top[i]= buffer[x+1][i];
left[i]= buffer[x][i];
diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
if(i==0)
mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
}else{
int mb_x, mb_y, i;
const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
for(mb_y = 0; mb_y < mb_height; mb_y++) {
if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for(mb_x = 0; mb_x < mb_width; mb_x++) {
if(mb_x==0 || mb_y==0){
for(i=0;i<3;i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->mjpeg_hsample[i];
v = s->mjpeg_vsample[i];
linesize= p->linesize[i];
for(y=0; y<v; y++){
for(x=0; x<h; x++){
int pred;
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
if(y==0 && mb_y==0){
if(x==0 && mb_x==0){
pred= 128;
}else{
pred= ptr[-1];
}
}else{
if(x==0 && mb_x==0){
pred= ptr[-linesize];
}else{
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
}
}
if(i==0)
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
}else{
for(i=0;i<3;i++) {
uint8_t *ptr;
int x, y, h, v, linesize;
h = s->mjpeg_hsample[i];
v = s->mjpeg_vsample[i];
linesize= p->linesize[i];
for(y=0; y<v; y++){
for(x=0; x<h; x++){
int pred;
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
if(i==0)
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
}
}
}
}
emms_c();
mjpeg_picture_trailer(s);
s->picture_number++;
flush_put_bits(&s->pb);
return pbBufPtr(&s->pb) - s->pb.buf;
// return (put_bits_count(&f->pb)+7)/8;
}
AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
"ljpeg",
CODEC_TYPE_VIDEO,
CODEC_ID_LJPEG,
sizeof(MpegEncContext),
MPV_encode_init,
encode_picture_lossless,
MPV_encode_end,
};
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