on dynamic resolution change,
The decoding process must be resumed with either a pair of calls to
VIDIOC_STREAMOFF() and VIDIOC_STREAMON() on the CAPTURE queue, or a call
to VIDIOC_DECODER_CMD() with the V4L2_DEC_CMD_START command.
Signed-off-by: Ming Qian <ming.q...@nxp.com>
---
libavcodec/v4l2_context.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/libavcodec/v4l2_context.c b/libavcodec/v4l2_context.c
index dda5157698c3..a181f884d2a6 100644
--- a/libavcodec/v4l2_context.c
+++ b/libavcodec/v4l2_context.c
@@ -153,6 +153,21 @@ static inline void v4l2_save_to_context(V4L2Context* ctx,
struct v4l2_format_upd
}
}
+static int v4l2_start_decode(V4L2Context *ctx)
+{
+ struct v4l2_decoder_cmd cmd = {
+ .cmd = V4L2_DEC_CMD_START,
+ .flags = 0,
+ };
+ int ret;
+
+ ret = ioctl(ctx_to_m2mctx(ctx)->fd, VIDIOC_DECODER_CMD, &cmd);
+ if (ret)
+ return AVERROR(errno);
+
+ return 0;
+}
+
/**
* handle resolution change event and end of stream event
* returns 1 if reinit was successful, negative if it failed
@@ -190,6 +205,9 @@ static int v4l2_handle_event(V4L2Context *ctx)
s->capture.height = v4l2_get_height(&cap_fmt);
s->capture.width = v4l2_get_width(&cap_fmt);
s->capture.sample_aspect_ratio = v4l2_get_sar(&s->capture);
+ } else {
+ v4l2_start_decode(ctx);
+ return 0;
}
if (reinit)
--
2.33.0
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