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alsamixer: Detect errors from device polling, stop the task and post an error message

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Partially fixes bug #614545.
This commit is contained in:
Sebastian Dröge 2010-04-04 20:55:02 +02:00
parent 7d1c889956
commit 1e8f3f7689
1 changed files with 27 additions and 3 deletions
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30
ext/alsa/gstalsamixer.c
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@ -35,6 +35,7 @@
#endif
#include "gstalsamixer.h"
#include <errno.h>
static void gst_alsa_mixer_update_option (GstAlsaMixer * mixer,
GstAlsaMixerOptions * alsa_opts);
@ -418,6 +419,7 @@ task_monitor_alsa (gpointer data)
unsigned int nfds, rnfds;
unsigned short revents;
GstAlsaMixer *mixer = (GstAlsaMixer *) data;
gint ret;
g_static_rec_mutex_lock (mixer->rec_mutex);
@ -433,6 +435,14 @@ task_monitor_alsa (gpointer data)
rnfds = snd_mixer_poll_descriptors (mixer->handle, pfds, nfds);
g_assert (rnfds <= nfds);
if (rnfds < 0) {
GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), ("alsa error: %s",
snd_strerror (rnfds)));
gst_task_pause (mixer->task);
g_static_rec_mutex_unlock (mixer->rec_mutex);
return;
}
pfds[rnfds].fd = mixer->pfd[0];
pfds[rnfds].events = POLLIN | POLLPRI | POLLHUP | POLLERR;
pfds[rnfds].revents = 0;
@ -440,14 +450,28 @@ task_monitor_alsa (gpointer data)
g_static_rec_mutex_unlock (mixer->rec_mutex);
GST_LOG ("task loop");
poll (pfds, rnfds + 1, -1);
ret = poll (pfds, rnfds + 1, -1);
if (ret < 0) {
GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
gst_task_pause (mixer->task);
return;
}
g_static_rec_mutex_lock (mixer->rec_mutex);
snd_mixer_poll_descriptors_revents (mixer->handle, pfds, nfds, &revents);
if (revents & POLLIN || revents & POLLPRI) {
ret =
snd_mixer_poll_descriptors_revents (mixer->handle, pfds, nfds, &revents);
if (ret < 0) {
GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), ("alsa error: %s",
snd_strerror (ret)));
gst_task_pause (mixer->task);
} else if (revents & (POLLIN | POLLPRI)) {
GST_DEBUG ("Handling events");
snd_mixer_handle_events (mixer->handle);
} else if (revents & (POLLERR | POLLNVAL | POLLHUP)) {
GST_ELEMENT_ERROR (mixer, RESOURCE, READ, (NULL), (NULL));
gst_task_pause (mixer->task);
}
g_static_rec_mutex_unlock (mixer->rec_mutex);