diff options
| -rw-r--r-- | src/pcm.c | 94 |
1 files changed, 47 insertions, 47 deletions
@@ -631,53 +631,6 @@ static int pcm_mmap_transfer_areas(struct pcm *pcm, char *buf, return count; } -/** Returns available frames in pcm buffer and corresponding time stamp. - * The clock is CLOCK_MONOTONIC if flag @ref PCM_MONOTONIC was specified in @ref pcm_open, - * otherwise the clock is CLOCK_REALTIME. - * For an input stream, frames available are frames ready for the application to read. - * For an output stream, frames available are the number of empty frames available for the application to write. - * Only available for PCMs opened with the @ref PCM_MMAP flag. - * @param pcm A PCM handle. - * @param avail The number of available frames - * @param tstamp The timestamp - * @return On success, zero is returned; on failure, negative one. - */ -int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail, - struct timespec *tstamp) -{ - int frames; - int rc; - snd_pcm_uframes_t hw_ptr; - - if (!pcm_is_ready(pcm)) - return -1; - - rc = pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_APPL|SNDRV_PCM_SYNC_PTR_HWSYNC); - if (rc < 0) - return -1; - - if ((pcm->mmap_status->state != PCM_STATE_RUNNING) && - (pcm->mmap_status->state != PCM_STATE_DRAINING)) - return -1; - - *tstamp = pcm->mmap_status->tstamp; - if (tstamp->tv_sec == 0 && tstamp->tv_nsec == 0) - return -1; - - hw_ptr = pcm->mmap_status->hw_ptr; - if (pcm->flags & PCM_IN) - frames = hw_ptr - pcm->mmap_control->appl_ptr; - else - frames = hw_ptr + pcm->buffer_size - pcm->mmap_control->appl_ptr; - - if (frames < 0) - return -1; - - *avail = (unsigned int)frames; - - return 0; -} - /** Writes audio samples to PCM. * If the PCM has not been started, it is started in this function. * This function is only valid for PCMs opened with the @ref PCM_OUT flag. @@ -1329,6 +1282,53 @@ int pcm_avail_update(struct pcm *pcm) return pcm_mmap_avail(pcm); } +/** Returns available frames in pcm buffer and corresponding time stamp. + * The clock is CLOCK_MONOTONIC if flag @ref PCM_MONOTONIC was specified in @ref pcm_open, + * otherwise the clock is CLOCK_REALTIME. + * For an input stream, frames available are frames ready for the application to read. + * For an output stream, frames available are the number of empty frames available for the application to write. + * Only available for PCMs opened with the @ref PCM_MMAP flag. + * @param pcm A PCM handle. + * @param avail The number of available frames + * @param tstamp The timestamp + * @return On success, zero is returned; on failure, negative one. + */ +int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail, + struct timespec *tstamp) +{ + int frames; + int rc; + snd_pcm_uframes_t hw_ptr; + + if (!pcm_is_ready(pcm)) + return -1; + + rc = pcm_sync_ptr(pcm, SNDRV_PCM_SYNC_PTR_APPL|SNDRV_PCM_SYNC_PTR_HWSYNC); + if (rc < 0) + return -1; + + if ((pcm->mmap_status->state != PCM_STATE_RUNNING) && + (pcm->mmap_status->state != PCM_STATE_DRAINING)) + return -1; + + *tstamp = pcm->mmap_status->tstamp; + if (tstamp->tv_sec == 0 && tstamp->tv_nsec == 0) + return -1; + + hw_ptr = pcm->mmap_status->hw_ptr; + if (pcm->flags & PCM_IN) + frames = hw_ptr - pcm->mmap_control->appl_ptr; + else + frames = hw_ptr + pcm->buffer_size - pcm->mmap_control->appl_ptr; + + if (frames < 0) + return -1; + + *avail = (unsigned int)frames; + + return 0; +} + int pcm_state(struct pcm *pcm) { int err = pcm_sync_ptr(pcm, 0); |