diff options
Diffstat (limited to 'Alc/backends/alsa.c')
| -rw-r--r-- | Alc/backends/alsa.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/Alc/backends/alsa.c b/Alc/backends/alsa.c index 49fec523..880f7ac9 100644 --- a/Alc/backends/alsa.c +++ b/Alc/backends/alsa.c @@ -79,6 +79,7 @@ MAKE_FUNC(snd_pcm_start); MAKE_FUNC(snd_pcm_resume); MAKE_FUNC(snd_pcm_reset); MAKE_FUNC(snd_pcm_wait); +MAKE_FUNC(snd_pcm_delay); MAKE_FUNC(snd_pcm_state); MAKE_FUNC(snd_pcm_avail_update); MAKE_FUNC(snd_pcm_areas_silence); @@ -151,6 +152,7 @@ MAKE_FUNC(snd_card_next); #define snd_pcm_resume psnd_pcm_resume #define snd_pcm_reset psnd_pcm_reset #define snd_pcm_wait psnd_pcm_wait +#define snd_pcm_delay psnd_pcm_delay #define snd_pcm_state psnd_pcm_state #define snd_pcm_avail_update psnd_pcm_avail_update #define snd_pcm_areas_silence psnd_pcm_areas_silence @@ -241,6 +243,7 @@ static ALCboolean alsa_load(void) LOAD_FUNC(snd_pcm_resume); LOAD_FUNC(snd_pcm_reset); LOAD_FUNC(snd_pcm_wait); + LOAD_FUNC(snd_pcm_delay); LOAD_FUNC(snd_pcm_state); LOAD_FUNC(snd_pcm_avail_update); LOAD_FUNC(snd_pcm_areas_silence); @@ -1224,6 +1227,21 @@ static void alsa_stop_capture(ALCdevice *Device) } +static ALint64 alsa_get_latency(ALCdevice *device) +{ + alsa_data *data = (alsa_data*)device->ExtraData; + snd_pcm_sframes_t delay = 0; + int err; + + if((err=snd_pcm_delay(data->pcmHandle, &delay)) < 0) + { + ERR("Failed to get latency!\n"); + return 0; + } + return maxi64((ALint64)delay*1000000000/device->Frequency, 0); +} + + static const BackendFuncs alsa_funcs = { alsa_open_playback, alsa_close_playback, @@ -1235,7 +1253,8 @@ static const BackendFuncs alsa_funcs = { alsa_start_capture, alsa_stop_capture, alsa_capture_samples, - alsa_available_samples + alsa_available_samples, + alsa_get_latency }; ALCboolean alc_alsa_init(BackendFuncs *func_list) |