[SCM] libav/experimental: H.264 multiple slice support in CABAC patch by (Loic (lll+ffmpeg m4x org)
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:43:00 UTC 2013
The following commit has been merged in the experimental branch:
commit 0bf796340a88612a5903693c29b252b416493f98
Author: Loic Le Loarer <lll+ffmpeg at m4x.org>
Date: Fri Feb 4 02:47:45 2005 +0000
H.264 multiple slice support in CABAC patch by (Loic (lll+ffmpeg m4x org)
3 more streams of the conformance suite decode to the
end instead of failing on an assert (CABACI3_Sony_B.jsv,
CABAST3_Sony_E.jsv and CABASTBR3_Sony_B.jsv), they are still false since
the first B slice probably because of deblocking in B slices not yet
implemented.
Originally committed as revision 3932 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 28cb778..1739108 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3477,24 +3477,31 @@ static int decode_slice_header(H264Context *h){
int first_mb_in_slice, pps_id;
int num_ref_idx_active_override_flag;
static const uint8_t slice_type_map[5]= {P_TYPE, B_TYPE, I_TYPE, SP_TYPE, SI_TYPE};
+ int slice_type;
+ int default_ref_list_done = 0;
s->current_picture.reference= h->nal_ref_idc != 0;
first_mb_in_slice= get_ue_golomb(&s->gb);
- h->slice_type= get_ue_golomb(&s->gb);
- if(h->slice_type > 9){
+ slice_type= get_ue_golomb(&s->gb);
+ if(slice_type > 9){
av_log(h->s.avctx, AV_LOG_ERROR, "slice type too large (%d) at %d %d\n", h->slice_type, s->mb_x, s->mb_y);
return -1;
}
- if(h->slice_type > 4){
- h->slice_type -= 5;
+ if(slice_type > 4){
+ slice_type -= 5;
h->slice_type_fixed=1;
}else
h->slice_type_fixed=0;
- h->slice_type= slice_type_map[ h->slice_type ];
-
+ slice_type= slice_type_map[ slice_type ];
+ if (slice_type == I_TYPE
+ || (h->slice_num != 0 && slice_type == h->slice_type) ) {
+ default_ref_list_done = 1;
+ }
+ h->slice_type= slice_type;
+
s->pict_type= h->slice_type; // to make a few old func happy, its wrong though
pps_id= get_ue_golomb(&s->gb);
@@ -3623,7 +3630,7 @@ static int decode_slice_header(H264Context *h){
}
}
- if(h->slice_num == 0){
+ if(!default_ref_list_done){
fill_default_ref_list(h);
}
@@ -4342,10 +4349,12 @@ static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_sl
if(intra_slice){
MpegEncContext * const s = &h->s;
const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
+ const int mba_xy = mb_xy - 1;
+ const int mbb_xy = mb_xy - s->mb_stride;
int ctx=0;
- if( s->mb_x > 0 && !IS_INTRA4x4( s->current_picture.mb_type[mb_xy-1] ) )
+ if( h->slice_table[mba_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mba_xy] ) )
ctx++;
- if( s->mb_y > 0 && !IS_INTRA4x4( s->current_picture.mb_type[mb_xy-s->mb_stride] ) )
+ if( h->slice_table[mbb_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( get_cabac( &h->cabac, &state[ctx] ) == 0 )
return 0; /* I4x4 */
@@ -4399,14 +4408,16 @@ static int decode_cabac_mb_type( H264Context *h ) {
}
} else if( h->slice_type == B_TYPE ) {
const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
+ const int mba_xy = mb_xy - 1;
+ const int mbb_xy = mb_xy - s->mb_stride;
int ctx = 0;
int bits;
- if( s->mb_x > 0 && !IS_SKIP( s->current_picture.mb_type[mb_xy-1] )
- && !IS_DIRECT( s->current_picture.mb_type[mb_xy-1] ) )
+ if( h->slice_table[mba_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mba_xy] )
+ && !IS_DIRECT( s->current_picture.mb_type[mba_xy] ) )
ctx++;
- if( s->mb_y > 0 && !IS_SKIP( s->current_picture.mb_type[mb_xy-s->mb_stride] )
- && !IS_DIRECT( s->current_picture.mb_type[mb_xy-s->mb_stride] ) )
+ if( h->slice_table[mbb_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mbb_xy] )
+ && !IS_DIRECT( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( !get_cabac( &h->cabac, &h->cabac_state[27+ctx] ) )
@@ -4444,9 +4455,9 @@ static int decode_cabac_mb_skip( H264Context *h) {
const int mbb_xy = mb_xy - s->mb_stride;
int ctx = 0;
- if( s->mb_x > 0 && !IS_SKIP( s->current_picture.mb_type[mba_xy] ) )
+ if( h->slice_table[mba_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mba_xy] ))
ctx++;
- if( s->mb_y > 0 && !IS_SKIP( s->current_picture.mb_type[mbb_xy] ) )
+ if( h->slice_table[mbb_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mbb_xy] ))
ctx++;
if( h->slice_type == P_TYPE || h->slice_type == SP_TYPE)
@@ -4482,10 +4493,10 @@ static int decode_cabac_mb_chroma_pre_mode( H264Context *h) {
int ctx = 0;
/* No need to test for IS_INTRA4x4 and IS_INTRA16x16, as we set chroma_pred_mode_table to 0 */
- if( s->mb_x > 0 && h->chroma_pred_mode_table[mba_xy] != 0 )
+ if( h->slice_table[mba_xy] == h->slice_num && h->chroma_pred_mode_table[mba_xy] != 0 )
ctx++;
- if( s->mb_y > 0 && h->chroma_pred_mode_table[mbb_xy] != 0 )
+ if( h->slice_table[mbb_xy] == h->slice_num && h->chroma_pred_mode_table[mbb_xy] != 0 )
ctx++;
if( get_cabac( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
@@ -4532,13 +4543,21 @@ static int decode_cabac_mb_cbp_luma( H264Context *h) {
if( x > 0 )
mba_xy = mb_xy;
- else if( s->mb_x > 0 )
+ else if( s->mb_x > 0 ) {
mba_xy = mb_xy - 1;
+ if (h->slice_table[mba_xy] != h->slice_num) {
+ mba_xy = -1;
+ }
+ }
if( y > 0 )
mbb_xy = mb_xy;
- else if( s->mb_y > 0 )
+ else if( s->mb_y > 0 ) {
mbb_xy = mb_xy - s->mb_stride;
+ if (h->slice_table[mbb_xy] != h->slice_num) {
+ mbb_xy = -1;
+ }
+ }
/* No need to test for skip as we put 0 for skip block */
if( mba_xy >= 0 ) {
@@ -4589,7 +4608,7 @@ static int decode_cabac_mb_dqp( H264Context *h) {
else
mbn_xy = s->mb_width - 1 + (s->mb_y-1)*s->mb_stride;
- if( mbn_xy >= 0 && h->last_qscale_diff != 0 && ( IS_INTRA16x16(s->current_picture.mb_type[mbn_xy] ) || (h->cbp_table[mbn_xy]&0x3f) ) )
+ if( h->last_qscale_diff != 0 && ( IS_INTRA16x16(s->current_picture.mb_type[mbn_xy] ) || (h->cbp_table[mbn_xy]&0x3f) ) )
ctx++;
while( get_cabac( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
--
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