- switch (inlink->format){
- case AV_PIX_FMT_YUV420P:
- sws_src_h = AV_CEIL_RSHIFT(sws_src_h, 1);
- sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 1);
- sws_dst_h = AV_CEIL_RSHIFT(sws_dst_h, 1);
- sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 1);
- break;
- case AV_PIX_FMT_YUV422P:
- sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 1);
- sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 1);
- break;
- case AV_PIX_FMT_YUV444P:
- break;
- case AV_PIX_FMT_YUV410P:
- sws_src_h = AV_CEIL_RSHIFT(sws_src_h, 2);
- sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 2);
- sws_dst_h = AV_CEIL_RSHIFT(sws_dst_h, 2);
- sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 2);
- break;
- case AV_PIX_FMT_YUV411P:
- sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 2);
- sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 2);
- break;
- default:
- av_log(context, AV_LOG_ERROR, "could not create SwsContext for scaling for given input pixel format");
- return AVERROR(EIO);
- }
- sr_context->sws_contexts[0] = sws_getContext(sws_src_w, sws_src_h, AV_PIX_FMT_GRAY8,
- sws_dst_w, sws_dst_h, AV_PIX_FMT_GRAY8,
- SWS_BICUBIC, NULL, NULL, NULL);
- if (!sr_context->sws_contexts[0]){
- av_log(context, AV_LOG_ERROR, "could not create SwsContext for scaling\n");
- return AVERROR(ENOMEM);
- }
- sr_context->sws_slice_h = sws_src_h;
- }
+ if (inlink->w != out_width || inlink->h != out_height) {
+ //espcn
+ outlink->w = out_width;
+ outlink->h = out_height;
+ if (inlink->format != AV_PIX_FMT_GRAY8){
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int sws_src_h = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
+ int sws_src_w = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
+ int sws_dst_h = AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h);
+ int sws_dst_w = AV_CEIL_RSHIFT(outlink->w, desc->log2_chroma_w);
+ ctx->sws_uv_scale = sws_getContext(sws_src_w, sws_src_h, AV_PIX_FMT_GRAY8,
+ sws_dst_w, sws_dst_h, AV_PIX_FMT_GRAY8,
+ SWS_BICUBIC, NULL, NULL, NULL);
+ ctx->sws_uv_height = sws_src_h;