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path: root/src/libffmpeg/libavcodec/mpeg12.c
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Diffstat (limited to 'src/libffmpeg/libavcodec/mpeg12.c')
-rw-r--r--src/libffmpeg/libavcodec/mpeg12.c219
1 files changed, 156 insertions, 63 deletions
diff --git a/src/libffmpeg/libavcodec/mpeg12.c b/src/libffmpeg/libavcodec/mpeg12.c
index 40ef61503..b74412ba8 100644
--- a/src/libffmpeg/libavcodec/mpeg12.c
+++ b/src/libffmpeg/libavcodec/mpeg12.c
@@ -79,6 +79,7 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s,
DCTELEM *block,
int n);
static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n);
+static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n);
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
static void exchange_uv(MpegEncContext *s);
@@ -207,8 +208,8 @@ static int find_frame_rate_index(MpegEncContext *s){
int64_t d;
for(i=1;i<14;i++) {
- int64_t n0= 1001LL/frame_rate_tab[i].den*frame_rate_tab[i].num*s->avctx->frame_rate_base;
- int64_t n1= 1001LL*s->avctx->frame_rate;
+ int64_t n0= 1001LL/frame_rate_tab[i].den*frame_rate_tab[i].num*s->avctx->time_base.num;
+ int64_t n1= 1001LL*s->avctx->time_base.den;
if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
d = ABS(n0 - n1);
@@ -232,10 +233,10 @@ static int encode_init(AVCodecContext *avctx)
if(find_frame_rate_index(s) < 0){
if(s->strict_std_compliance >=0){
- av_log(avctx, AV_LOG_ERROR, "MPEG1/2 doesnt support %d/%d fps\n", avctx->frame_rate, avctx->frame_rate_base);
+ av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
return -1;
}else{
- av_log(avctx, AV_LOG_INFO, "MPEG1/2 doesnt support %d/%d fps, there may be AV sync issues\n", avctx->frame_rate, avctx->frame_rate_base);
+ av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
}
}
@@ -1061,11 +1062,11 @@ static int mpeg_decode_mb(MpegEncContext *s,
dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
- assert(s->mb_skiped==0);
+ assert(s->mb_skipped==0);
if (s->mb_skip_run-- != 0) {
if(s->pict_type == I_TYPE){
- av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
+ av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
@@ -1084,7 +1085,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
s->field_select[0][0]= s->picture_structure - 1;
- s->mb_skiped = 1;
+ s->mb_skipped = 1;
s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
} else {
int mb_type;
@@ -1107,7 +1108,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
- s->mb_skiped = 1;
+ s->mb_skipped = 1;
}
return 0;
@@ -1146,6 +1147,12 @@ static int mpeg_decode_mb(MpegEncContext *s,
dprintf("mb_type=%x\n", mb_type);
// motion_type = 0; /* avoid warning */
if (IS_INTRA(mb_type)) {
+ s->dsp.clear_blocks(s->block[0]);
+
+ if(!s->chroma_y_shift){
+ s->dsp.clear_blocks(s->block[6]);
+ }
+
/* compute dct type */
if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
!s->frame_pred_frame_dct) {
@@ -1180,9 +1187,15 @@ static int mpeg_decode_mb(MpegEncContext *s,
#endif
if (s->codec_id == CODEC_ID_MPEG2VIDEO) {
- for(i=0;i<mb_block_count;i++) {
- if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
- return -1;
+ if(s->flags2 & CODEC_FLAG2_FAST){
+ for(i=0;i<6;i++) {
+ mpeg2_fast_decode_block_intra(s, s->pblocks[i], i);
+ }
+ }else{
+ for(i=0;i<mb_block_count;i++) {
+ if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0)
+ return -1;
+ }
}
} else {
for(i=0;i<6;i++) {
@@ -1357,8 +1370,13 @@ static int mpeg_decode_mb(MpegEncContext *s,
}
s->mb_intra = 0;
-
if (HAS_CBP(mb_type)) {
+ s->dsp.clear_blocks(s->block[0]);
+
+ if(!s->chroma_y_shift){
+ s->dsp.clear_blocks(s->block[6]);
+ }
+
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
@@ -1571,45 +1589,42 @@ static inline int mpeg1_decode_block_inter(MpegEncContext *s,
const int qscale= s->qscale;
{
- int v;
OPEN_READER(re, &s->gb);
i = -1;
/* special case for the first coef. no need to add a second vlc table */
UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level= (3*qscale*quant_matrix[0])>>5;
level= (level-1)|1;
- if(v&1)
+ if(GET_CACHE(re, &s->gb)&0x40000000)
level= -level;
block[0] = level;
i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
}
/* now quantify & encode AC coefs */
for(;;) {
- UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
- if(level == 127){
- break;
- } else if(level != 0) {
+ if(level != 0) {
i += run;
j = scantable[i];
level= ((level*2+1)*qscale*quant_matrix[j])>>5;
level= (level-1)|1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
+ level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
}
i += run;
j = scantable[i];
@@ -1629,7 +1644,12 @@ static inline int mpeg1_decode_block_inter(MpegEncContext *s,
}
block[j] = level;
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
}
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
}
s->block_last_index[n] = i;
@@ -1644,45 +1664,42 @@ static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *bloc
const int qscale= s->qscale;
{
- int v;
OPEN_READER(re, &s->gb);
i = -1;
/* special case for the first coef. no need to add a second vlc table */
UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level= (3*qscale)>>1;
level= (level-1)|1;
- if(v&1)
+ if(GET_CACHE(re, &s->gb)&0x40000000)
level= -level;
block[0] = level;
i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
}
/* now quantify & encode AC coefs */
for(;;) {
- UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
- if(level == 127){
- break;
- } else if(level != 0) {
+ if(level != 0) {
i += run;
j = scantable[i];
level= ((level*2+1)*qscale)>>1;
level= (level-1)|1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
UPDATE_CACHE(re, &s->gb);
level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8);
if (level == -128) {
- level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8);
+ level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8);
} else if (level == 0) {
- level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8);
+ level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8);
}
i += run;
j = scantable[i];
@@ -1698,7 +1715,12 @@ static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *bloc
}
block[j] = level;
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
}
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
}
s->block_last_index[n] = i;
@@ -1720,7 +1742,6 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
mismatch = 1;
{
- int v;
OPEN_READER(re, &s->gb);
i = -1;
if (n < 4)
@@ -1730,30 +1751,28 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
/* special case for the first coef. no need to add a second vlc table */
UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level= (3*qscale*quant_matrix[0])>>5;
- if(v&1)
+ if(GET_CACHE(re, &s->gb)&0x40000000)
level= -level;
block[0] = level;
mismatch ^= level;
i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
}
/* now quantify & encode AC coefs */
for(;;) {
- UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
- if(level == 127){
- break;
- } else if(level != 0) {
+ if(level != 0) {
i += run;
j = scantable[i];
level= ((level*2+1)*qscale*quant_matrix[j])>>5;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
@@ -1776,7 +1795,12 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
mismatch ^= level;
block[j] = level;
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
}
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
}
block[63] ^= (mismatch & 1);
@@ -1799,29 +1823,27 @@ static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
/* special case for the first coef. no need to add a second vlc table */
UPDATE_CACHE(re, &s->gb);
- v= SHOW_UBITS(re, &s->gb, 2);
- if (v & 2) {
- LAST_SKIP_BITS(re, &s->gb, 2);
+ if (((int32_t)GET_CACHE(re, &s->gb)) < 0) {
level= (3*qscale)>>1;
- if(v&1)
+ if(GET_CACHE(re, &s->gb)&0x40000000)
level= -level;
block[0] = level;
i++;
+ SKIP_BITS(re, &s->gb, 2);
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ goto end;
}
/* now quantify & encode AC coefs */
for(;;) {
- UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
- if(level == 127){
- break;
- } else if(level != 0) {
+ if(level != 0) {
i += run;
j = scantable[i];
level= ((level*2+1)*qscale)>>1;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
+ SKIP_BITS(re, &s->gb, 1);
} else {
/* escape */
run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
@@ -1839,7 +1861,12 @@ static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s,
}
block[j] = level;
+ if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
+ break;
+ UPDATE_CACHE(re, &s->gb);
}
+end:
+ LAST_SKIP_BITS(re, &s->gb, 2);
CLOSE_READER(re, &s->gb);
s->block_last_index[n] = i;
return 0;
@@ -1926,6 +1953,76 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s,
return 0;
}
+static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s,
+ DCTELEM *block,
+ int n)
+{
+ int level, dc, diff, j, run;
+ int component;
+ RLTable *rl;
+ uint8_t * scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
+ const int qscale= s->qscale;
+
+ /* DC coef */
+ if (n < 4){
+ quant_matrix = s->intra_matrix;
+ component = 0;
+ }else{
+ quant_matrix = s->chroma_intra_matrix;
+ component = (n&1) + 1;
+ }
+ diff = decode_dc(&s->gb, component);
+ if (diff >= 0xffff)
+ return -1;
+ dc = s->last_dc[component];
+ dc += diff;
+ s->last_dc[component] = dc;
+ block[0] = dc << (3 - s->intra_dc_precision);
+ if (s->intra_vlc_format)
+ rl = &rl_mpeg2;
+ else
+ rl = &rl_mpeg1;
+
+ {
+ OPEN_READER(re, &s->gb);
+ /* now quantify & encode AC coefs */
+ for(;;) {
+ UPDATE_CACHE(re, &s->gb);
+ GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
+
+ if(level == 127){
+ break;
+ } else if(level != 0) {
+ scantable += run;
+ j = *scantable;
+ level= (level*qscale*quant_matrix[j])>>4;
+ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
+ LAST_SKIP_BITS(re, &s->gb, 1);
+ } else {
+ /* escape */
+ run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
+ UPDATE_CACHE(re, &s->gb);
+ level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12);
+ scantable += run;
+ j = *scantable;
+ if(level<0){
+ level= (-level*qscale*quant_matrix[j])>>4;
+ level= -level;
+ }else{
+ level= (level*qscale*quant_matrix[j])>>4;
+ }
+ }
+
+ block[j] = level;
+ }
+ CLOSE_READER(re, &s->gb);
+ }
+
+ s->block_last_index[n] = scantable - s->intra_scantable.permutated;
+ return 0;
+}
+
typedef struct Mpeg1Context {
MpegEncContext mpeg_enc_ctx;
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
@@ -2009,8 +2106,8 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
//mpeg1 fps
- avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
- avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
+ avctx->time_base.den = frame_rate_tab[s->frame_rate_index].num;
+ avctx->time_base.num= frame_rate_tab[s->frame_rate_index].den;
//mpeg1 aspect
avctx->sample_aspect_ratio= av_d2q(
1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
@@ -2018,8 +2115,8 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
}else{//mpeg2
//mpeg2 fps
av_reduce(
- &s->avctx->frame_rate,
- &s->avctx->frame_rate_base,
+ &s->avctx->time_base.den,
+ &s->avctx->time_base.num,
frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num,
frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den,
1<<30);
@@ -2499,10 +2596,6 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
XVMC_init_block(s);//set s->block
#endif
- s->dsp.clear_blocks(s->block[0]);
- if(!s->chroma_y_shift){
- s->dsp.clear_blocks(s->block[6]);
- }
ret = mpeg_decode_mb(s, s->block);
s->chroma_qscale= s->qscale;
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-23 18:42:43 +0000