diff options
| -rw-r--r-- | include/tinyalsa/asoundlib.h | 3 | ||||
| -rw-r--r-- | pcm.c | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h index a85e810..eb3e4c4 100644 --- a/include/tinyalsa/asoundlib.h +++ b/include/tinyalsa/asoundlib.h @@ -205,6 +205,9 @@ int pcm_stop(struct pcm *pcm); int pcm_wait(struct pcm *pcm, int timeout); +/* Get the pcm delay */ +long pcm_get_delay(struct pcm *pcm); + /* * MIXER API */ @@ -170,6 +170,7 @@ struct pcm { struct snd_pcm_sync_ptr *sync_ptr; void *mmap_buffer; unsigned int noirq_frames_per_msec; + long pcm_delay; }; unsigned int pcm_get_buffer_size(struct pcm *pcm) @@ -1046,3 +1047,11 @@ int pcm_mmap_read(struct pcm *pcm, void *data, unsigned int count) return pcm_mmap_transfer(pcm, data, count); } + +long pcm_get_delay(struct pcm *pcm) +{ + if (ioctl(pcm->fd, SNDRV_PCM_IOCTL_DELAY, &pcm->pcm_delay) < 0) + return -1; + + return pcm->pcm_delay; +} |