+int av_vdpau_get_surface_parameters(AVCodecContext *avctx,
+ VdpChromaType *type,
+ uint32_t *width, uint32_t *height)
+{
+ VdpChromaType t;
+ uint32_t w = avctx->coded_width;
+ uint32_t h = avctx->coded_height;
+
+ /* See <vdpau/vdpau.h> for per-type alignment constraints. */
+ switch (avctx->sw_pix_fmt) {
+ case AV_PIX_FMT_YUV420P:
+ case AV_PIX_FMT_YUVJ420P:
+ t = VDP_CHROMA_TYPE_420;
+ w = (w + 1) & ~1;
+ h = (h + 3) & ~3;
+ break;
+ case AV_PIX_FMT_YUV422P:
+ case AV_PIX_FMT_YUVJ422P:
+ t = VDP_CHROMA_TYPE_422;
+ w = (w + 1) & ~1;
+ h = (h + 1) & ~1;
+ break;
+ case AV_PIX_FMT_YUV444P:
+ case AV_PIX_FMT_YUVJ444P:
+ t = VDP_CHROMA_TYPE_444;
+ h = (h + 1) & ~1;
+ break;
+ default:
+ return AVERROR(ENOSYS);
+ }
+
+ if (type)
+ *type = t;
+ if (width)
+ *width = w;
+ if (height)
+ *height = h;
+ return 0;
+}
+