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author | Ivan Kalvachev <ikalvachev@gmail.com> | 2004-06-12 16:51:15 +0000 |
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committer | Ivan Kalvachev <ikalvachev@gmail.com> | 2004-06-12 16:51:15 +0000 |
commit | 715731a32b461cd819d08c206bafc4e415ae504a (patch) | |
tree | 6f0303c1c0eb91cab29040a94bd55902a73d828d /libavcodec/xvmcvideo.c | |
parent | 72bd81008e8c12f59c43cd5ed87afc95ab170807 (diff) | |
download | ffmpeg-streaming-715731a32b461cd819d08c206bafc4e415ae504a.zip ffmpeg-streaming-715731a32b461cd819d08c206bafc4e415ae504a.tar.gz |
better cbp handling and small speedup in mpeg12
Originally committed as revision 3219 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/xvmcvideo.c')
-rw-r--r-- | libavcodec/xvmcvideo.c | 73 |
1 files changed, 16 insertions, 57 deletions
diff --git a/libavcodec/xvmcvideo.c b/libavcodec/xvmcvideo.c index 201d2d7..04ea406 100644 --- a/libavcodec/xvmcvideo.c +++ b/libavcodec/xvmcvideo.c @@ -55,71 +55,21 @@ xvmc_render_state_t * render; void XVMC_pack_pblocks(MpegEncContext *s, int cbp){ int i,j; +const int mb_block_count = 4+(1<<s->chroma_format); j=0; - for(i=0;i<6;i++){ - if(cbp & (1<<(5-i)) ){ + cbp<<= 12-mb_block_count; + for(i=0; i<mb_block_count; i++){ + if(cbp & (1<<11)) { s->pblocks[i] = (short *)(&s->block[(j++)]); }else{ s->pblocks[i] = NULL; } + cbp+=cbp; // printf("s->pblocks[%d]=%p ,s->block=%p cbp=%d\n",i,s->pblocks[i],s->block,cbp); } - if (s->chroma_format >= 2){ - if (s->chroma_format == 2){//CHROMA_422 - for(i=6;i<8;i++){ - if(cbp & (1<<(6+7-i)) ){ - s->pblocks[i] = (short *)(&s->block[(j++)]); - }else{ - s->pblocks[i] = NULL; - } - } - }else{//CHROMA_444 - for(i=6; i<12; i++){ - if(cbp & (1<<(6+11-i)) ){ - s->pblocks[i] = (short *)(&s->block[(j++)]); - }else{ - s->pblocks[i] = NULL; - } - } - } - } -} - -static int calc_cbp(MpegEncContext *s){ -/* compute cbp */ -int i,cbp = 0; - for(i=0; i<4; i++) { - if(s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - if(s->flags & CODEC_FLAG_GRAY) - return cbp; //4 block for grayscale one done - - - for(i=4; i<6; i++) { - if(s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - if(s->chroma_format < 2) return cbp; - - - if(s->chroma_format == 2){/*CHROMA_422*/ - for(i=6; i<8; i++) { - if(s->block_last_index[i] >= 0) - cbp |= 1 << (6+7 - i); - } - }else{/*CHROMA_444*/ - for(i=6; i<12; i++) { - if(s->block_last_index[i] >= 0) - cbp |= 1 << (6+11 - i); - } - } - return cbp; } - - //these functions should be called on every new field or/and frame //They should be safe if they are called few times for same field! int XVMC_field_start(MpegEncContext*s, AVCodecContext *avctx){ @@ -301,6 +251,14 @@ const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; blocks_per_mb = 4 + (1 << (s->chroma_format)); } +// calculate cbp + cbp = 0; + for(i=0; i<blocks_per_mb; i++) { + cbp+= cbp; + if(s->block_last_index[i] >= 0) + cbp++; + } + if(s->flags & CODEC_FLAG_GRAY){ if(s->mb_intra){//intra frames are alwasy full chroma block for(i=4; i<blocks_per_mb; i++){ @@ -308,10 +266,11 @@ const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; if(!render->unsigned_intra) s->pblocks[i][0] = 1<<10; } - }else + }else{ + cbp&= 0xf << (blocks_per_mb - 4); blocks_per_mb = 4;//Luminance blocks only + } } - cbp = calc_cbp(s); mv_block->coded_block_pattern = cbp; if(cbp == 0) mv_block->macroblock_type &= ~XVMC_MB_TYPE_PATTERN; |