#include <assert.h>
+#include "libavutil/pixdesc.h"
+
#include "avcodec.h"
#include "mpegvideo.h"
#include "mjpeg.h"
}
}
-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];
+
+ 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(&s->pb, SOI);
+ put_marker(pb, SOI);
- jpeg_put_comments(s->avctx, &s->pb);
+ jpeg_put_comments(avctx, pb);
- jpeg_table_header(&s->pb, &s->intra_scantable, s->intra_matrix);
+ jpeg_table_header(pb, intra_scantable, intra_matrix);
- 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;
+ 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_BGR24)
+ 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)
+static void escape_FF(PutBitContext *pb, int start)
{
- int size= put_bits_count(&s->pb) - start*8;
+ int size = put_bits_count(pb) - start * 8;
int i, ff_count;
- uint8_t *buf= s->pb.buf + start;
+ uint8_t *buf = pb->buf + start;
int align= (-(size_t)(buf))&3;
assert((size&7) == 0);
if(ff_count==0) return;
- flush_put_bits(&s->pb);
- skip_put_bytes(&s->pb, ff_count);
+ flush_put_bits(pb);
+ skip_put_bytes(pb, ff_count);
for(i=size-1; ff_count; i--){
int v= buf[i];
if(length) put_bits(pbc, length, (1<<length)-1);
}
-void ff_mjpeg_encode_picture_trailer(MpegEncContext *s)
+void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
{
- ff_mjpeg_encode_stuffing(&s->pb);
- flush_put_bits(&s->pb);
+ ff_mjpeg_encode_stuffing(pb);
+ flush_put_bits(pb);
- assert((s->header_bits&7)==0);
+ assert((header_bits & 7) == 0);
- escape_FF(s, s->header_bits>>3);
+ escape_FF(pb, header_bits >> 3);
- put_marker(&s->pb, EOI);
+ put_marker(pb, EOI);
}
-void ff_mjpeg_encode_dc(MpegEncContext *s, int val,
+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(&s->pb, huff_size[0], huff_code[0]);
+ put_bits(pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
nbits= av_log2_16bit(val) + 1;
- put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
+ put_bits(pb, huff_size[nbits], huff_code[nbits]);
- put_sbits(&s->pb, nbits, mant);
+ put_sbits(pb, nbits, mant);
}
}
dc = block[0]; /* overflow is impossible */
val = dc - s->last_dc[component];
if (n < 4) {
- ff_mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
+ ff_mjpeg_encode_dc(&s->pb, 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 {
- ff_mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ ff_mjpeg_encode_dc(&s->pb, 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;
}
projects / ffmpeg / blobdiff