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[FFmpeg-devel] Fwd: [PATCH] set ulMaxDisplayDelay cuvidec parser option to zero if low_delay flag is on

Message ID CAGqZTUsWr8TW1RRCEej2NkexGoARRJQK43JHLr0Tfnd7QPaNNA@mail.gmail.com
State New
Headers show
Series [FFmpeg-devel] Fwd: [PATCH] set ulMaxDisplayDelay cuvidec parser option to zero if low_delay flag is on
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Checks

Context Check Description
andriy/configure warning Failed to apply patch
andriy/configure warning Failed to apply patch

Commit Message

clime Feb. 19, 2021, 10:18 p.m. UTC
From: Michal Novotny <michal.novotny@comprimato.com>

* zero is recommended value in Nvidia coding samples for low latency use-cases
---
 libavcodec/cuviddec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

     ctx->cuparseinfo.pfnDecodePicture = cuvid_handle_picture_decode;
--
2.30.1
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Patch

diff --git a/libavcodec/cuviddec.c b/libavcodec/cuviddec.c
index 49775b5a09..ef5acb6b7b 100644
--- a/libavcodec/cuviddec.c
+++ b/libavcodec/cuviddec.c
@@ -999,7 +999,7 @@  static av_cold int cuvid_decode_init(AVCodecContext *avctx)
     }

     ctx->cuparseinfo.ulMaxNumDecodeSurfaces = ctx->nb_surfaces;
-    ctx->cuparseinfo.ulMaxDisplayDelay = 4;
+    ctx->cuparseinfo.ulMaxDisplayDelay = avctx->flags &
AV_CODEC_FLAG_LOW_DELAY ? 0 : 4;
     ctx->cuparseinfo.pUserData = avctx;
     ctx->cuparseinfo.pfnSequenceCallback = cuvid_handle_video_sequence;