[FFmpeg-devel] [PATCH 3/3] avcodec/nvdec: Increase frame pool size to help deinterlacing

[Philip Langdale]

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.

Signed-off-by: Philip Langdale <philipl at overt.org>
---
 libavcodec/nvdec.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c
index 4dd6b1acf3..0426c9b319 100644
--- 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);
-- 
2.19.1