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Added snd_*_poll_descriptors_revents functions.

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This commit is contained in:
Jaroslav Kysela 2001-11-30 17:36:45 +00:00
parent 23ab0b3509
commit ddb7209e9a
15 changed files with 195 additions and 36 deletions
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27
src/pcm/pcm.c
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@ -1003,14 +1003,33 @@ int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm)
*/
int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space)
{
assert(pcm);
if (space >= 1) {
assert(pcm && pfds);
if (space >= 1 && pfds) {
pfds->fd = pcm->poll_fd;
pfds->events = pcm->stream == SND_PCM_STREAM_PLAYBACK ? POLLOUT : POLLIN;
}
pfds->events = pcm->stream == SND_PCM_STREAM_PLAYBACK ? (POLLOUT|POLLERR) : (POLLIN|POLLERR);
} else
return 0;
return 1;
}
/**
* \brief get returned events from poll descriptors
* \param pcm PCM handle
* \param pfds array of poll descriptors
* \param nfds count of poll descriptors
* \param revents returned events
* \return zero if success, otherwise a negative error code
*/
int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
{
assert(pcm && pfds && revents);
if (nfds == 1) {
*revents = pfds->revents;
return 0;
}
return -EINVAL;
}
#ifndef DOC_HIDDEN
#define STATE(v) [SND_PCM_STATE_##v] = #v
#define STREAM(v) [SND_PCM_STREAM_##v] = #v