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v4l2bufferpool: Cleanup poll method and retry on EINTR/EAGAIN

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=731015
This commit is contained in:
Nicolas Dufresne 2014-05-30 19:37:57 -04:00
parent 303883752e
commit 1648e46f86
1 changed files with 21 additions and 11 deletions
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32
sys/v4l2/gstv4l2bufferpool.c
View file

@ -934,22 +934,32 @@ gst_v4l2_buffer_pool_poll (GstV4l2BufferPool * pool)
{
gint ret;
if (pool->can_poll_device) {
GST_LOG_OBJECT (pool, "polling device");
ret = gst_poll_wait (pool->poll, GST_CLOCK_TIME_NONE);
if (G_UNLIKELY (ret < 0)) {
if (errno == EBUSY)
if (!pool->can_poll_device)
goto done;
GST_LOG_OBJECT (pool, "polling device");
again:
ret = gst_poll_wait (pool->poll, GST_CLOCK_TIME_NONE);
if (G_UNLIKELY (ret < 0)) {
switch (errno) {
case EBUSY:
goto stopped;
if (errno == ENXIO) {
case EAGAIN:
case EINTR:
goto again;
case ENXIO:
GST_WARNING_OBJECT (pool,
"v4l2 device doesn't support polling. Disabling");
"v4l2 device doesn't support polling. Disabling"
" using libv4l2 in this case may cause deadlocks");
pool->can_poll_device = FALSE;
} else {
if (errno != EAGAIN && errno != EINTR)
goto select_error;
}
goto done;
default:
goto select_error;
}
}
done:
return GST_FLOW_OK;
/* ERRORS */