From 715731a32b461cd819d08c206bafc4e415ae504a Mon Sep 17 00:00:00 2001 From: Ivan Kalvachev Date: Sat, 12 Jun 2004 16:51:15 +0000 Subject: [PATCH] better cbp handling and small speedup in mpeg12 Originally committed as revision 3219 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mpeg12.c | 43 +++++++++-------------------- libavcodec/xvmcvideo.c | 73 +++++++++++--------------------------------------- 2 files changed, 29 insertions(+), 87 deletions(-) diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c index f187783..15c5109 100644 --- a/libavcodec/mpeg12.c +++ b/libavcodec/mpeg12.c @@ -1038,7 +1038,8 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64]) { int i, j, k, cbp, val, mb_type, motion_type; - + const int mb_block_count = 4 + (1<< s->chroma_format) + dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); assert(s->mb_skiped==0); @@ -1151,7 +1152,7 @@ static int mpeg_decode_mb(MpegEncContext *s, #endif if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - for(i=0;i<4+(1<chroma_format);i++) { + for(i=0;ipblocks[i], i) < 0) return -1; } @@ -1335,11 +1336,9 @@ static int mpeg_decode_mb(MpegEncContext *s, av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); return -1; } - if(s->chroma_format == 2){//CHROMA422 - cbp|= ( get_bits(&s->gb,2) ) << 6; - }else - if(s->chroma_format > 2){//CHROMA444 - cbp|= ( get_bits(&s->gb,6) ) << 6; + if(mb_block_count > 6){ + cbp<<= mb_block_count-6; + cbp |= get_bits(&s->gb, mb_block_count-6); } #ifdef HAVE_XVMC @@ -1353,34 +1352,16 @@ static int mpeg_decode_mb(MpegEncContext *s, #endif if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - for(i=0;i<6;i++) { - if (cbp & (1<<(5-i)) ) { + cbp<<= 12-mb_block_count; + + for(i=0;ipblocks[i], i) < 0) return -1; } else { s->block_last_index[i] = -1; } - } - if (s->chroma_format >= 2) { - if (s->chroma_format == 2) {//CHROMA_422) - for(i=6;i<8;i++) { - if (cbp & (1<<(6+7-i)) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - } - }else{ /*CHROMA_444*/ - for(i=6;i<12;i++) { - if (cbp & (1<<(6+11-i)) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - } - } + cbp+=cbp; } } else { for(i=0;i<6;i++) { @@ -3013,6 +2994,8 @@ AVCodec mpeg2video_encoder = { static int mpeg_mc_decode_init(AVCodecContext *avctx){ Mpeg1Context *s; + if( avctx->thread_count > 1) + return -1; if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) ) return -1; if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){ 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<chroma_format); j=0; - for(i=0;i<6;i++){ - if(cbp & (1<<(5-i)) ){ + cbp<<= 12-mb_block_count; + for(i=0; ipblocks[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; iblock_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; imb_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; -- 2.7.4