in the v4l2 stateful video document, we can see the following
description:
During the resolution change sequence, the OUTPUT queue must remain
streaming. Calling VIDIOC_STREAMOFF() on the OUTPUT queue would
abort the sequence and initiate a seek.
In principle, the OUTPUT queue operates separately from the CAPTURE
queue and this remains true for the duration of the entire
resolution change sequence as well.
so don't reinit the output queue when handling the resolution change
event
Signed-off-by: Ming Qian <ming.q...@nxp.com>
---
libavcodec/v4l2_context.c | 27 ++-------------------------
1 file changed, 2 insertions(+), 25 deletions(-)
diff --git a/libavcodec/v4l2_context.c b/libavcodec/v4l2_context.c
index ff1ea8e57b08..dda5157698c3 100644
--- a/libavcodec/v4l2_context.c
+++ b/libavcodec/v4l2_context.c
@@ -162,9 +162,8 @@ static int v4l2_handle_event(V4L2Context *ctx)
{
V4L2m2mContext *s = ctx_to_m2mctx(ctx);
struct v4l2_format cap_fmt = s->capture.format;
- struct v4l2_format out_fmt = s->output.format;
struct v4l2_event evt = { 0 };
- int full_reinit, reinit, ret;
+ int reinit, ret;
ret = ioctl(s->fd, VIDIOC_DQEVENT, &evt);
if (ret < 0) {
@@ -180,25 +179,12 @@ static int v4l2_handle_event(V4L2Context *ctx)
if (evt.type != V4L2_EVENT_SOURCE_CHANGE)
return 0;
- ret = ioctl(s->fd, VIDIOC_G_FMT, &out_fmt);
- if (ret) {
- av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_G_FMT\n", s->output.name);
- return 0;
- }
-
ret = ioctl(s->fd, VIDIOC_G_FMT, &cap_fmt);
if (ret) {
av_log(logger(ctx), AV_LOG_ERROR, "%s VIDIOC_G_FMT\n",
s->capture.name);
return 0;
}
- full_reinit = v4l2_resolution_changed(&s->output, &out_fmt);
- if (full_reinit) {
- s->output.height = v4l2_get_height(&out_fmt);
- s->output.width = v4l2_get_width(&out_fmt);
- s->output.sample_aspect_ratio = v4l2_get_sar(&s->output);
- }
-
reinit = v4l2_resolution_changed(&s->capture, &cap_fmt);
if (reinit) {
s->capture.height = v4l2_get_height(&cap_fmt);
@@ -206,18 +192,9 @@ static int v4l2_handle_event(V4L2Context *ctx)
s->capture.sample_aspect_ratio = v4l2_get_sar(&s->capture);
}
- if (full_reinit || reinit)
+ if (reinit)
s->reinit = 1;
- if (full_reinit) {
- ret = ff_v4l2_m2m_codec_full_reinit(s);
- if (ret) {
- av_log(logger(ctx), AV_LOG_ERROR, "v4l2_m2m_codec_full_reinit\n");
- return AVERROR(EINVAL);
- }
- goto reinit_run;
- }
-
if (reinit) {
if (s->avctx)
ret = ff_set_dimensions(s->avctx, s->capture.width,
s->capture.height);
--
2.32.0
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