avcodec/nvdec: Increase frame pool size to help deinterlacing

With the cuda yadif filter in use, the number of mapped decoder
frames could increase by two, as the filter holds on to additional
frames.

diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c
index 4dd6b1acf3ade95ad837423468517b114941d545..0426c9b3197f861f5652cdfccfb84a57db2b45b5 100644 (file)
--- a/libavcodec/nvdec.c
+++ b/libavcodec/nvdec.c
@@ -601,7 +601,11 @@ int ff_nvdec_frame_params(AVCodecContext *avctx,
     frames_ctx->format            = AV_PIX_FMT_CUDA;
     frames_ctx->width             = (avctx->coded_width + 1) & ~1;
     frames_ctx->height            = (avctx->coded_height + 1) & ~1;
-    frames_ctx->initial_pool_size = dpb_size;
+    /*
+     * We add two extra frames to the pool to account for deinterlacing filters
+     * holding onto their frames.
+     */
+    frames_ctx->initial_pool_size = dpb_size + 2;
 
     frames_ctx->free = nvdec_free_dummy;
     frames_ctx->pool = av_buffer_pool_init(0, nvdec_alloc_dummy);