From c76b2bf0b4e752455e5ffbd7dee12e935c2eaccd Mon Sep 17 00:00:00 2001 From: Andriy Gelman Date: Sat, 9 May 2020 19:34:06 -0400 Subject: [PATCH] avcodec/v4l2_context: Finish draining if V4L2_BUF_FLAG_LAST is set V4L2 api can indicate that flushing of the capture buffers is completed by setting the V4L2_BUF_FLAG_LAST flag. Use guards because the flag was only defined in Linux v4.2. Reference: linux/Documentation/media/uapi/v4l/dev-decoder.rst "The client must continue to handle both queues independently, similarly to normal decode operation. This includes: ... - queuing and dequeuing CAPTURE buffers, until a buffer marked with the V4L2_BUF_FLAG_LAST flag is dequeued" Reviewed-by: Ming Qian Signed-off-by: Andriy Gelman --- libavcodec/v4l2_context.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/v4l2_context.c b/libavcodec/v4l2_context.c index 52dedb119f..29b144ed73 100644 --- a/libavcodec/v4l2_context.c +++ b/libavcodec/v4l2_context.c @@ -412,6 +412,10 @@ dequeue: ctx->done = 1; return NULL; } +#ifdef V4L2_BUF_FLAG_LAST + if (buf.flags & V4L2_BUF_FLAG_LAST) + ctx->done = 1; +#endif } avbuf = &ctx->buffers[buf.index];