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ao_portaudio: implement device listing

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This commit is contained in:
wm4 2014-10-13 16:43:05 +02:00
parent 859d02b40e
commit 19f543ecbb
1 changed files with 24 additions and 2 deletions
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26
audio/out/ao_portaudio.c
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@ -125,6 +125,24 @@ static int validate_device_opt(struct mp_log *log, const m_option_t *opt,
return 0;
}
static void list_devs(struct ao *ao, struct ao_device_list *list)
{
if (Pa_Initialize() < 0)
return;
int count = Pa_GetDeviceCount(); // negative on error
for (int n = 0; n < count; n++) {
const PaDeviceInfo* info = Pa_GetDeviceInfo(n);
char desc[1024];
snprintf(desc, sizeof(desc), "%s, %d channels, latency: %.2f "
"ms, sample rate: %.0f", info->name,
info->maxOutputChannels,
info->defaultHighOutputLatency * 1000,
info->defaultSampleRate);
ao_device_list_add(list, ao, &(struct ao_device_desc){info->name, desc});
}
Pa_Terminate();
}
static int stream_callback(const void *input,
void *output_v,
unsigned long frameCount,
@ -167,8 +185,11 @@ static int init(struct ao *ao)
return -1;
int pa_device = Pa_GetDefaultOutputDevice();
if (priv->cfg_device && priv->cfg_device[0])
pa_device = find_device(ao->log, priv->cfg_device);
char *dev_name = priv->cfg_device;
if (!dev_name || !dev_name[0])
dev_name = ao->device;
if (dev_name && dev_name[0])
pa_device = find_device(ao->log, dev_name);
if (pa_device == paNoDevice)
goto error_exit;
@ -246,6 +267,7 @@ const struct ao_driver audio_out_portaudio = {
.uninit = uninit,
.reset = reset,
.resume = resume,
.list_devs = list_devs,
.priv_size = sizeof(struct priv),
.options = (const struct m_option[]) {
OPT_STRING_VALIDATE("device", cfg_device, 0, validate_device_opt),