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add new function pa_alsa_recover_from_poll() to merge common core from module-alsa-sink and module-alsa-source

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2294 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2008-04-22 02:44:25 +00:00
parent 9a486efa5f
commit 69f6bdf155
2 changed files with 51 additions and 2 deletions
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51
src/modules/alsa-util.c
View file

@ -974,7 +974,6 @@ void pa_alsa_redirect_errors_dec(void) {
snd_lib_error_set_handler(NULL);
}
void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info) {
static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = {
@ -1030,7 +1029,7 @@ void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info) {
pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info));
if ((card = snd_pcm_info_get_card(pcm_info)) >= 0) {
pa_proplist_setf(p, "card", "%i", card);
pa_proplist_setf(p, "alsa.card", "%i", card);
if (snd_card_get_name(card, &cn) >= 0)
pa_proplist_sets(p, "alsa.card_name", cn);
@ -1046,3 +1045,51 @@ void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info) {
else if (n)
pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, n);
}
int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) {
snd_pcm_state_t state;
int err;
pa_assert(pcm);
if (revents & POLLERR)
pa_log_warn("Got POLLERR from ALSA");
if (revents & POLLNVAL)
pa_log_warn("Got POLLNVAL from ALSA");
if (revents & POLLHUP)
pa_log_warn("Got POLLHUP from ALSA");
state = snd_pcm_state(pcm);
pa_log_warn("PCM state is %s", snd_pcm_state_name(state));
/* Try to recover from this error */
switch (state) {
case SND_PCM_STATE_XRUN:
if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", snd_strerror(err));
return -1;
}
break;
case SND_PCM_STATE_SUSPENDED:
if ((err = snd_pcm_recover(pcm, -ESTRPIPE, 1)) != 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED: %s", snd_strerror(err));
return -1;
}
break;
default:
snd_pcm_drop(pcm);
if ((err = snd_pcm_prepare(pcm)) < 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): %s", snd_strerror(err));
return -1;
}
break;
}
return 0;
}

2
src/modules/alsa-util.h
View file

@ -90,4 +90,6 @@ void pa_alsa_redirect_errors_dec(void);
void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info);
int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents);
#endif