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ffmpeg.wasm-core
Commit 307eb248 authored by Baptiste Coudurier's avatar Baptiste Coudurier
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add MPEG-2 intra vlc support 

Originally committed as revision 5372 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent d634aa20
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Showing with 59 additions and 16 deletions
libavcodec/avcodec.h
View file @ 307eb248
......@@ -341,6 +341,7 @@ extern int motion_estimation_method;
#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
#define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
......
libavcodec/mpeg12.c
View file @ 307eb248
......@@ -95,6 +95,7 @@ static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
static uint8_t fcode_tab[MAX_MV*2+1];
static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
/* simple include everything table for dc, first byte is bits number next 3 are code*/
static uint32_t mpeg1_lum_dc_uni[512];
......@@ -166,11 +167,11 @@ static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
if (code < 111 /* rl->n */) {
/* store the vlc & sign at once */
len= mpeg1_vlc[code][1]+1;
bits= (mpeg1_vlc[code][0]<<1) + sign;
len= rl->table_vlc[code][1]+1;
bits= (rl->table_vlc[code][0]<<1) + sign;
} else {
len= mpeg1_vlc[111/*rl->n*/][1]+6;
bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
len= rl->table_vlc[111/*rl->n*/][1]+6;
bits= rl->table_vlc[111/*rl->n*/][0]<<6;
bits|= run;
if (alevel < 128) {
......@@ -766,6 +767,8 @@ void ff_mpeg1_encode_init(MpegEncContext *s)
done=1;
init_rl(&rl_mpeg1, 1);
if(s->intra_vlc_format)
init_rl(&rl_mpeg2, 1);
for(i=0; i<64; i++)
{
......@@ -774,6 +777,8 @@ void ff_mpeg1_encode_init(MpegEncContext *s)
}
init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len);
if(s->intra_vlc_format)
init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
/* build unified dc encoding tables */
for(i=-255; i<256; i++)
......@@ -840,9 +845,14 @@ void ff_mpeg1_encode_init(MpegEncContext *s)
s->min_qcoeff=-2047;
s->max_qcoeff= 2047;
}
s->intra_ac_vlc_length=
if (s->intra_vlc_format) {
s->intra_ac_vlc_length=
s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
} else {
s->intra_ac_vlc_length=
s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
}
s->inter_ac_vlc_length=
s->intra_ac_vlc_last_length=
s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
}
......@@ -889,7 +899,7 @@ static void mpeg1_encode_block(MpegEncContext *s,
{
int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
int code, component;
// RLTable *rl = &rl_mpeg1;
const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
last_index = s->block_last_index[n];
......@@ -901,12 +911,8 @@ static void mpeg1_encode_block(MpegEncContext *s,
encode_dc(s, diff, component);
s->last_dc[component] = dc;
i = 1;
/*
if (s->intra_vlc_format)
rl = &rl_mpeg2;
else
rl = &rl_mpeg1;
*/
table_vlc = rl_mpeg2.table_vlc;
} else {
/* encode the first coefficient : needs to be done here because
it is handled slightly differently */
......@@ -941,14 +947,13 @@ static void mpeg1_encode_block(MpegEncContext *s,
MASK_ABS(sign, alevel)
sign&=1;
// code = get_rl_index(rl, 0, run, alevel);
if (alevel <= mpeg1_max_level[0][run]){
code= mpeg1_index_run[0][run] + alevel - 1;
/* store the vlc & sign at once */
put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
} else {
/* escape seems to be pretty rare <5% so i dont optimize it */
put_bits(&s->pb, mpeg1_vlc[111/*rl->n*/][1], mpeg1_vlc[111/*rl->n*/][0]);
put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
/* escape: only clip in this case */
put_bits(&s->pb, 6, run);
if(s->codec_id == CODEC_ID_MPEG1VIDEO){
......@@ -969,7 +974,7 @@ static void mpeg1_encode_block(MpegEncContext *s,
}
}
/* end of block */
put_bits(&s->pb, 2, 0x2);
put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
}
#endif //CONFIG_ENCODERS
......
libavcodec/mpegvideo.c
View file @ 307eb248
......@@ -991,6 +991,7 @@ int MPV_encode_init(AVCodecContext *avctx)
s->obmc= !!(s->flags & CODEC_FLAG_OBMC);
s->loop_filter= !!(s->flags & CODEC_FLAG_LOOP_FILTER);
s->alternate_scan= !!(s->flags & CODEC_FLAG_ALT_SCAN);
s->intra_vlc_format= !!(s->flags2 & CODEC_FLAG2_INTRA_VLC);
if(avctx->rc_max_rate && !avctx->rc_buffer_size){
av_log(avctx, AV_LOG_ERROR, "a vbv buffer size is needed, for encoding with a maximum bitrate\n");
......@@ -1075,6 +1076,11 @@ int MPV_encode_init(AVCodecContext *avctx)
return -1;
}
if((s->flags2 & CODEC_FLAG2_INTRA_VLC) && s->codec_id != CODEC_ID_MPEG2VIDEO){
av_log(avctx, AV_LOG_ERROR, "intra vlc table not supported by codec\n");
return -1;
}
if(s->avctx->thread_count > 1 && s->codec_id != CODEC_ID_MPEG4
&& s->codec_id != CODEC_ID_MPEG1VIDEO && s->codec_id != CODEC_ID_MPEG2VIDEO
&& (s->codec_id != CODEC_ID_H263P || !(s->flags & CODEC_FLAG_H263P_SLICE_STRUCT))){
......
libavcodec/utils.c
View file @ 307eb248
......@@ -740,6 +740,7 @@ static AVOption options[]={
{"partb8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_B8X8, INT_MIN, INT_MAX, V|E, "partitions"},
{"sc_factor", NULL, OFFSET(scenechange_factor), FF_OPT_TYPE_INT, 6, 0, INT_MAX, V|E},
{"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},
{"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
{NULL},
};
......
tests/ffmpeg.regression.ref
View file @ 307eb248
......@@ -7,6 +7,10 @@ a60d3fb60982786b9761a07c24664e9c *./data/a-mpeg2.mpg
747312 ./data/a-mpeg2.mpg
f5b8b9c2a5e162b6c01d6b299d03b117 *./data/out.yuv
stddev: 7.69 PSNR:30.39 bytes:7602176
218ef56c1909d66e77c87cd98c9868e8 *./data/a-mpeg2ivlc.mpg
737935 ./data/a-mpeg2ivlc.mpg
f5b8b9c2a5e162b6c01d6b299d03b117 *./data/out.yuv
stddev: 7.69 PSNR:30.39 bytes:7602176
a34af358ee5b5dab19d37ee29f1927b2 *./data/a-mpeg2.mpg
748099 ./data/a-mpeg2.mpg
555f76a5df78088411b83f5faf334762 *./data/out.yuv
......@@ -19,6 +23,10 @@ stddev: 7.69 PSNR:30.39 bytes:7602176
820348 ./data/a-mpeg2thread.mpg
6b820ffc74de50cc863b41d51f72c22b *./data/out.yuv
stddev: 7.64 PSNR:30.45 bytes:7602176
a88c3fc28a6e62351c1b71235e7916a7 *./data/a-mpeg2threadivlc.mpg
810646 ./data/a-mpeg2threadivlc.mpg
6b820ffc74de50cc863b41d51f72c22b *./data/out.yuv
stddev: 7.64 PSNR:30.45 bytes:7602176
edb3e58ea66de2e9b32713daf9b5c3f1 *./data/a-mpeg2reuse.mpg
2119706 ./data/a-mpeg2reuse.mpg
1dab2eaca5320fe01afbe9596b2bd6cc *./data/out.yuv
......
tests/regression.sh
View file @ 307eb248
......@@ -179,6 +179,13 @@ do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1v
# mpeg2 decoding
do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst
# mpeg2 encoding using intra vlc
file=${outfile}mpeg2ivlc.mpg
do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1video -flags2 +ivlc $file
# mpeg2 decoding
do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst
# mpeg2 encoding
file=${outfile}mpeg2.mpg
do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -idct int -dct int -f mpeg1video $file
......@@ -203,6 +210,13 @@ do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1v
# mpeg2 decoding
do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst
# mpeg2 encoding interlaced using intra vlc
file=${outfile}mpeg2threadivlc.mpg
do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1video -bf 2 -flags +ildct+ilme -flags2 +ivlc -threads 2 $file
# mpeg2 decoding
do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst
# mpeg2 encoding interlaced
file=${outfile}mpeg2reuse.mpg
do_ffmpeg $file -y -sameq -me_threshold 256 -mb_threshold 1024 -i ${outfile}mpeg2thread.mpg -vcodec mpeg2video -f mpeg1video -bf 2 -flags +ildct+ilme -threads 4 $file
......
tests/rotozoom.regression.ref
View file @ 307eb248
......@@ -7,6 +7,10 @@ f0310ea9b9a4f37c1a4dd0d4985a3f81 *./data/a-mpeg2.mpg
199396 ./data/a-mpeg2.mpg
94581e9516461557b194aeefaaba3835 *./data/out.yuv
stddev: 4.97 PSNR:34.18 bytes:7602176
356a07f0872b371acb2eebd9b0225786 *./data/a-mpeg2ivlc.mpg
198603 ./data/a-mpeg2ivlc.mpg
94581e9516461557b194aeefaaba3835 *./data/out.yuv
stddev: 4.97 PSNR:34.18 bytes:7602176
374bd257b96328935926b350b0c5cada *./data/a-mpeg2.mpg
198338 ./data/a-mpeg2.mpg
f464b420ae24c1e453df8d3e5ef9140d *./data/out.yuv
......@@ -19,6 +23,10 @@ stddev: 4.98 PSNR:34.16 bytes:7602176
183955 ./data/a-mpeg2thread.mpg
38441603e2201ddb01632ba3411a6bb8 *./data/out.yuv
stddev: 4.76 PSNR:34.56 bytes:7602176
0c414c53b9418e6566680ed1d85d5a3b *./data/a-mpeg2threadivlc.mpg
183095 ./data/a-mpeg2threadivlc.mpg
38441603e2201ddb01632ba3411a6bb8 *./data/out.yuv
stddev: 4.76 PSNR:34.56 bytes:7602176
c9f6617461caee57ccb6d438761527c8 *./data/a-mpeg2reuse.mpg
396729 ./data/a-mpeg2reuse.mpg
b10aec71132301cad001070e8ad46b7d *./data/out.yuv
......
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