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mjpegenc: do not pass MpegEncContext to ff_mjpeg_encode_picture_header() 

This will allow deMpegEncContextizing the LJPEG encoder.
This commit is contained in:
Anton Khirnov 2013-12-01 22:05:18 +01:00
parent 6d70639c7d
commit 058d5f2feb
4 changed files with 74 additions and 47 deletions
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3
libavcodec/ljpegenc.c
View File

@ -70,7 +70,8 @@ static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
ff_mjpeg_encode_picture_header(s);
ff_mjpeg_encode_picture_header(avctx, &s->pb, &s->intra_scantable,
s->intra_matrix);
s->header_bits= put_bits_count(&s->pb);

111
libavcodec/mjpegenc.c
View File

@ -32,6 +32,8 @@
#include <assert.h>
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "mjpeg.h"
@ -172,78 +174,99 @@ static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
}
}
void ff_mjpeg_encode_picture_header(MpegEncContext *s)
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
ScanTable *intra_scantable,
uint16_t intra_matrix[64])
{
const int lossless= s->avctx->codec_id != AV_CODEC_ID_MJPEG;
int chroma_h_shift, chroma_v_shift;
const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG;
int hsample[3], vsample[3];
put_marker(&s->pb, SOI);
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);
jpeg_put_comments(s->avctx, &s->pb);
if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
avctx->pix_fmt == AV_PIX_FMT_BGRA) {
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;
}
jpeg_table_header(&s->pb, &s->intra_scantable, s->intra_matrix);
put_marker(pb, SOI);
switch(s->avctx->codec_id){
case AV_CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break;
case AV_CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break;
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(&s->pb, 16, 17);
if(lossless && s->avctx->pix_fmt == AV_PIX_FMT_BGRA)
put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
put_bits(pb, 16, 17);
if (lossless && avctx->pix_fmt == AV_PIX_FMT_BGRA)
put_bits(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 */
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(&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 */
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(&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 */
put_bits(&s->pb, 8, 0); /* select matrix */
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(&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 */
put_bits(&s->pb, 8, 0); /* select matrix */
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(&s->pb, SOS);
put_bits(&s->pb, 16, 12); /* length */
put_bits(&s->pb, 8, 3); /* 3 components */
put_marker(pb, SOS);
put_bits(pb, 16, 12); /* length */
put_bits(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 */
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(&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 */
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(&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(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(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
put_bits(pb, 8, lossless ? avctx->prediction_method + 1 : 0); /* Ss (not used) */
switch(s->avctx->codec_id){
case AV_CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */
case AV_CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* 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(&s->pb, 8, 0); /* Ah/Al (not used) */
put_bits(pb, 8, 0); /* Ah/Al (not used) */
}
static void escape_FF(MpegEncContext *s, int start)

4
libavcodec/mjpegenc.h
View File

@ -51,7 +51,9 @@ typedef struct MJpegContext {
int ff_mjpeg_encode_init(MpegEncContext *s);
void ff_mjpeg_encode_close(MpegEncContext *s);
void ff_mjpeg_encode_picture_header(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(MpegEncContext *s);
void ff_mjpeg_encode_stuffing(PutBitContext *pbc);
void ff_mjpeg_encode_dc(MpegEncContext *s, int val,

3
libavcodec/mpegvideo_enc.c
View File

@ -3296,7 +3296,8 @@ static int encode_picture(MpegEncContext *s, int picture_number)
switch(s->out_format) {
case FMT_MJPEG:
if (CONFIG_MJPEG_ENCODER)
ff_mjpeg_encode_picture_header(s);
ff_mjpeg_encode_picture_header(s->avctx, &s->pb, &s->intra_scantable,
s->intra_matrix);
break;
case FMT_H261:
if (CONFIG_H261_ENCODER)