void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){ int w_align= 1; int h_align= 1; switch(s->pix_fmt){ case PIX_FMT_YUV420P: case PIX_FMT_YUYV422: case PIX_FMT_UYVY422: case PIX_FMT_YUV422P: case PIX_FMT_YUV440P: case PIX_FMT_YUV444P: case PIX_FMT_GRAY8: case PIX_FMT_GRAY16BE: case PIX_FMT_GRAY16LE: case PIX_FMT_YUVJ420P: case PIX_FMT_YUVJ422P: case PIX_FMT_YUVJ440P: case PIX_FMT_YUVJ444P: case PIX_FMT_YUVA420P: case PIX_FMT_YUV420P9LE: case PIX_FMT_YUV420P9BE: case PIX_FMT_YUV420P10LE: case PIX_FMT_YUV420P10BE: case PIX_FMT_YUV422P10LE: case PIX_FMT_YUV422P10BE: w_align= 16; //FIXME check for non mpeg style codecs and use less alignment h_align= 16; if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP || s->codec_id == CODEC_ID_H264) h_align= 32; // interlaced is rounded up to 2 MBs break; case PIX_FMT_YUV411P: case PIX_FMT_UYYVYY411: w_align=32; h_align=8; break; case PIX_FMT_YUV410P: if(s->codec_id == CODEC_ID_SVQ1){ w_align=64; h_align=64; } case PIX_FMT_RGB555: if(s->codec_id == CODEC_ID_RPZA){ w_align=4; h_align=4; } case PIX_FMT_PAL8: case PIX_FMT_BGR8: case PIX_FMT_RGB8: if(s->codec_id == CODEC_ID_SMC){ w_align=4; h_align=4; } break; case PIX_FMT_BGR24: if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){ w_align=4; h_align=4; } break; default: w_align= 1; h_align= 1; break; } *width = FFALIGN(*width , w_align); *height= FFALIGN(*height, h_align); if(s->codec_id == CODEC_ID_H264 || s->lowres) *height+=2; // some of the optimized chroma MC reads one line too much // which is also done in mpeg decoders with lowres > 0 linesize_align[0] = linesize_align[1] = linesize_align[2] = linesize_align[3] = STRIDE_ALIGN; //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the //picture size unneccessarily in some cases. The solution here is not //pretty and better ideas are welcome! #if HAVE_MMX if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 || s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F || s->codec_id == CODEC_ID_VP6A) { linesize_align[0] = linesize_align[1] = linesize_align[2] = 16; } #endif }