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mjpeg: Split off bits shared by MJPEG and LJPEG encoders

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This obviates a dependency of the LJPEG encoder on mpegvideo.
This commit is contained in:
Diego Biurrun 2014-06-30 05:37:59 -07:00
parent 253d0be6a1
commit adcb8392c9
8 changed files with 361 additions and 295 deletions
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2
configure vendored
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@ -1790,7 +1790,7 @@ jpegls_decoder_select="golomb mjpeg_decoder"
jpegls_encoder_select="golomb"
jv_decoder_select="blockdsp"
lagarith_decoder_select="huffyuvdsp"
ljpeg_encoder_select="aandcttables mpegvideoenc"
ljpeg_encoder_select="aandcttables dsputil"
loco_decoder_select="golomb"
mdec_decoder_select="blockdsp dsputil mpegvideo"
metasound_decoder_select="lsp mdct sinewin"

4
libavcodec/Makefile
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@ -233,7 +233,7 @@ OBJS-$(CONFIG_JV_DECODER) += jvdec.o
OBJS-$(CONFIG_KGV1_DECODER) += kgv1dec.o
OBJS-$(CONFIG_KMVC_DECODER) += kmvc.o
OBJS-$(CONFIG_LAGARITH_DECODER) += lagarith.o lagarithrac.o
OBJS-$(CONFIG_LJPEG_ENCODER) += ljpegenc.o mjpegenc.o mjpeg.o
OBJS-$(CONFIG_LJPEG_ENCODER) += ljpegenc.o mjpeg.o mjpegenc_common.o
OBJS-$(CONFIG_LOCO_DECODER) += loco.o
OBJS-$(CONFIG_MACE3_DECODER) += mace.o
OBJS-$(CONFIG_MACE6_DECODER) += mace.o
@ -242,7 +242,7 @@ OBJS-$(CONFIG_METASOUND_DECODER) += metasound.o metasound_data.o \
twinvq.o
OBJS-$(CONFIG_MIMIC_DECODER) += mimic.o
OBJS-$(CONFIG_MJPEG_DECODER) += mjpegdec.o mjpeg.o
OBJS-$(CONFIG_MJPEG_ENCODER) += mjpegenc.o mjpeg.o
OBJS-$(CONFIG_MJPEG_ENCODER) += mjpegenc.o mjpeg.o mjpegenc_common.o
OBJS-$(CONFIG_MJPEGB_DECODER) += mjpegbdec.o
OBJS-$(CONFIG_MLP_DECODER) += mlpdec.o mlpdsp.o
OBJS-$(CONFIG_MMVIDEO_DECODER) += mmvideo.o

1
libavcodec/ljpegenc.c
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@ -37,6 +37,7 @@
#include "avcodec.h"
#include "dsputil.h"
#include "internal.h"
#include "mjpegenc_common.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"

286
libavcodec/mjpegenc.c
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@ -35,6 +35,7 @@
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "mjpegenc_common.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
@ -77,291 +78,6 @@ void ff_mjpeg_encode_close(MpegEncContext *s)
av_free(s->mjpeg_ctx);
}
/* table_class: 0 = DC coef, 1 = AC coefs */
static int put_huffman_table(PutBitContext *p, int table_class, int table_id,
const uint8_t *bits_table, const uint8_t *value_table)
{
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(PutBitContext *p, ScanTable *intra_scantable,
uint16_t intra_matrix[64])
{
int i, j, size;
uint8_t *ptr;
/* quant matrixes */
put_marker(p, DQT);
put_bits(p, 16, 2 + 1 * (1 + 64));
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 0); /* table 0 */
for(i=0;i<64;i++) {
j = intra_scantable->permutated[i];
put_bits(p, 8, intra_matrix[j]);
}
/* huffman table */
put_marker(p, DHT);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
size = 2;
size += put_huffman_table(p, 0, 0, avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc);
size += put_huffman_table(p, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc);
size += put_huffman_table(p, 1, 0, avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance);
size += put_huffman_table(p, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
AV_WB16(ptr, size);
}
static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
{
int size;
uint8_t *ptr;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
avpriv_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, avctx->sample_aspect_ratio.num);
put_bits(p, 16, avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* comment */
if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
AV_WB16(ptr, size);
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
AV_WB16(ptr, size);
}
}
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
ScanTable *intra_scantable,
uint16_t intra_matrix[64])
{
int chroma_h_shift, chroma_v_shift;
const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG;
int hsample[3], vsample[3];
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);
if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
avctx->pix_fmt == AV_PIX_FMT_BGR24) {
vsample[0] = hsample[0] =
vsample[1] = hsample[1] =
vsample[2] = hsample[2] = 1;
} else {
vsample[0] = 2;
vsample[1] = 2 >> chroma_v_shift;
vsample[2] = 2 >> chroma_v_shift;
hsample[0] = 2;
hsample[1] = 2 >> chroma_h_shift;
hsample[2] = 2 >> chroma_h_shift;
}
put_marker(pb, SOI);
jpeg_put_comments(avctx, pb);
jpeg_table_header(pb, intra_scantable, intra_matrix);
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
default: assert(0);
}
put_bits(pb, 16, 17);
if (lossless && avctx->pix_fmt == AV_PIX_FMT_BGR24)
put_bits(pb, 8, 9); /* 9 bits/component RCT */
else
put_bits(pb, 8, 8); /* 8 bits/component */
put_bits(pb, 16, avctx->height);
put_bits(pb, 16, avctx->width);
put_bits(pb, 8, 3); /* 3 components */
/* Y component */
put_bits(pb, 8, 1); /* component number */
put_bits(pb, 4, hsample[0]); /* H factor */
put_bits(pb, 4, vsample[0]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* Cb component */
put_bits(pb, 8, 2); /* component number */
put_bits(pb, 4, hsample[1]); /* H factor */
put_bits(pb, 4, vsample[1]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* Cr component */
put_bits(pb, 8, 3); /* component number */
put_bits(pb, 4, hsample[2]); /* H factor */
put_bits(pb, 4, vsample[2]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* scan header */
put_marker(pb, SOS);
put_bits(pb, 16, 12); /* length */
put_bits(pb, 8, 3); /* 3 components */
/* Y component */
put_bits(pb, 8, 1); /* index */
put_bits(pb, 4, 0); /* DC huffman table index */
put_bits(pb, 4, 0); /* AC huffman table index */
/* Cb component */
put_bits(pb, 8, 2); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
/* Cr component */
put_bits(pb, 8, 3); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
put_bits(pb, 8, lossless ? avctx->prediction_method + 1 : 0); /* Ss (not used) */
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
default: assert(0);
}
put_bits(pb, 8, 0); /* Ah/Al (not used) */
}
static void escape_FF(PutBitContext *pb, int start)
{
int size = put_bits_count(pb) - start * 8;
int i, ff_count;
uint8_t *buf = 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;
flush_put_bits(pb);
skip_put_bytes(pb, ff_count);
for(i=size-1; ff_count; i--){
int v= buf[i];
if(v==0xFF){
buf[i+ff_count]= 0;
ff_count--;
}
buf[i+ff_count]= v;
}
}
void ff_mjpeg_encode_stuffing(PutBitContext * pbc)
{
int length;
length= (-put_bits_count(pbc))&7;
if(length) put_bits(pbc, length, (1<<length)-1);
}
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
{
ff_mjpeg_encode_stuffing(pb);
flush_put_bits(pb);
assert((header_bits & 7) == 0);
escape_FF(pb, header_bits >> 3);
put_marker(pb, EOI);
}
void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
uint8_t *huff_size, uint16_t *huff_code)
{
int mant, nbits;
if (val == 0) {
put_bits(pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
nbits= av_log2_16bit(val) + 1;
put_bits(pb, huff_size[nbits], huff_code[nbits]);
put_sbits(pb, nbits, mant);
}
}
static void encode_block(MpegEncContext *s, int16_t *block, int n)
{
int mant, nbits, code, i, j;

7
libavcodec/mjpegenc.h
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@ -51,13 +51,6 @@ typedef struct MJpegContext {
int ff_mjpeg_encode_init(MpegEncContext *s);
void ff_mjpeg_encode_close(MpegEncContext *s);
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
ScanTable *intra_scantable,
uint16_t intra_matrix[64]);
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits);
void ff_mjpeg_encode_stuffing(PutBitContext *pbc);
void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
uint8_t *huff_size, uint16_t *huff_code);
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[6][64]);
#endif /* AVCODEC_MJPEGENC_H */

317
libavcodec/mjpegenc_common.c Normal file
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@ -0,0 +1,317 @@
/*
* lossless JPEG shared bits
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "dsputil.h"
#include "put_bits.h"
#include "mjpegenc_common.h"
#include "mjpeg.h"
/* table_class: 0 = DC coef, 1 = AC coefs */
static int put_huffman_table(PutBitContext *p, int table_class, int table_id,
const uint8_t *bits_table, const uint8_t *value_table)
{
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(PutBitContext *p, ScanTable *intra_scantable,
uint16_t intra_matrix[64])
{
int i, j, size;
uint8_t *ptr;
/* quant matrixes */
put_marker(p, DQT);
put_bits(p, 16, 2 + 1 * (1 + 64));
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 0); /* table 0 */
for(i=0;i<64;i++) {
j = intra_scantable->permutated[i];
put_bits(p, 8, intra_matrix[j]);
}
/* huffman table */
put_marker(p, DHT);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
size = 2;
size += put_huffman_table(p, 0, 0, avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc);
size += put_huffman_table(p, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc);
size += put_huffman_table(p, 1, 0, avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance);
size += put_huffman_table(p, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
AV_WB16(ptr, size);
}
static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
{
int size;
uint8_t *ptr;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
avpriv_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, avctx->sample_aspect_ratio.num);
put_bits(p, 16, avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* comment */
if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
AV_WB16(ptr, size);
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
AV_WB16(ptr, size);
}
}
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
ScanTable *intra_scantable,
uint16_t intra_matrix[64])
{
int chroma_h_shift, chroma_v_shift;
const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG;
int hsample[3], vsample[3];
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);
if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
avctx->pix_fmt == AV_PIX_FMT_BGR24) {
vsample[0] = hsample[0] =
vsample[1] = hsample[1] =
vsample[2] = hsample[2] = 1;
} else {
vsample[0] = 2;
vsample[1] = 2 >> chroma_v_shift;
vsample[2] = 2 >> chroma_v_shift;
hsample[0] = 2;
hsample[1] = 2 >> chroma_h_shift;
hsample[2] = 2 >> chroma_h_shift;
}
put_marker(pb, SOI);
jpeg_put_comments(avctx, pb);
jpeg_table_header(pb, intra_scantable, intra_matrix);
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
default: assert(0);
}
put_bits(pb, 16, 17);
if (lossless && avctx->pix_fmt == AV_PIX_FMT_BGR24)
put_bits(pb, 8, 9); /* 9 bits/component RCT */
else
put_bits(pb, 8, 8); /* 8 bits/component */
put_bits(pb, 16, avctx->height);
put_bits(pb, 16, avctx->width);
put_bits(pb, 8, 3); /* 3 components */
/* Y component */
put_bits(pb, 8, 1); /* component number */
put_bits(pb, 4, hsample[0]); /* H factor */
put_bits(pb, 4, vsample[0]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* Cb component */
put_bits(pb, 8, 2); /* component number */
put_bits(pb, 4, hsample[1]); /* H factor */
put_bits(pb, 4, vsample[1]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* Cr component */
put_bits(pb, 8, 3); /* component number */
put_bits(pb, 4, hsample[2]); /* H factor */
put_bits(pb, 4, vsample[2]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* scan header */
put_marker(pb, SOS);
put_bits(pb, 16, 12); /* length */
put_bits(pb, 8, 3); /* 3 components */
/* Y component */
put_bits(pb, 8, 1); /* index */
put_bits(pb, 4, 0); /* DC huffman table index */
put_bits(pb, 4, 0); /* AC huffman table index */
/* Cb component */
put_bits(pb, 8, 2); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
/* Cr component */
put_bits(pb, 8, 3); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
put_bits(pb, 8, lossless ? avctx->prediction_method + 1 : 0); /* Ss (not used) */
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
default: assert(0);
}
put_bits(pb, 8, 0); /* Ah/Al (not used) */
}
static void escape_FF(PutBitContext *pb, int start)
{
int size = put_bits_count(pb) - start * 8;
int i, ff_count;
uint8_t *buf = 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;
flush_put_bits(pb);
skip_put_bytes(pb, ff_count);
for(i=size-1; ff_count; i--){
int v= buf[i];
if(v==0xFF){
buf[i+ff_count]= 0;
ff_count--;
}
buf[i+ff_count]= v;
}
}
void ff_mjpeg_encode_stuffing(PutBitContext * pbc)
{
int length;
length= (-put_bits_count(pbc))&7;
if(length) put_bits(pbc, length, (1<<length)-1);
}
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
{
ff_mjpeg_encode_stuffing(pb);
flush_put_bits(pb);
assert((header_bits & 7) == 0);
escape_FF(pb, header_bits >> 3);
put_marker(pb, EOI);
}
void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
uint8_t *huff_size, uint16_t *huff_code)
{
int mant, nbits;
if (val == 0) {
put_bits(pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
nbits= av_log2_16bit(val) + 1;
put_bits(pb, huff_size[nbits], huff_code[nbits]);
put_sbits(pb, nbits, mant);
}
}

38
libavcodec/mjpegenc_common.h Normal file
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@ -0,0 +1,38 @@
/*
* lossless JPEG shared bits
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_MJPEGENC_COMMON_H
#define AVCODEC_MJPEGENC_COMMON_H
#include <stdint.h>
#include "avcodec.h"
#include "dsputil.h"
#include "put_bits.h"
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
ScanTable *intra_scantable,
uint16_t intra_matrix[64]);
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits);
void ff_mjpeg_encode_stuffing(PutBitContext *pbc);
void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
uint8_t *huff_size, uint16_t *huff_code);
#endif /* AVCODEC_MJPEGENC_COMMON_H */

1
libavcodec/mpegvideo_enc.c
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@ -42,6 +42,7 @@
#include "mpegvideo.h"
#include "h261.h"
#include "h263.h"
#include "mjpegenc_common.h"
#include "mathops.h"
#include "mpegutils.h"
#include "mjpegenc.h"