static void context_state_callback(pa_context *context, void *userdata) {
SoundIoPrivate *si = (SoundIoPrivate *)userdata;
SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
SoundIo *soundio = &si->pub;
switch (pa_context_get_state(context)) {
case PA_CONTEXT_UNCONNECTED: // The context hasn't been connected yet.
return;
case PA_CONTEXT_CONNECTING: // A connection is being established.
return;
case PA_CONTEXT_AUTHORIZING: // The client is authorizing itself to the daemon.
return;
case PA_CONTEXT_SETTING_NAME: // The client is passing its application name to the daemon.
return;
case PA_CONTEXT_READY: // The connection is established, the context is ready to execute operations.
sipa->ready_flag = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
case PA_CONTEXT_TERMINATED: // The connection was terminated cleanly.
pa_threaded_mainloop_signal(sipa->main_loop, 0);
return;
case PA_CONTEXT_FAILED: // The connection failed or was disconnected.
if (sipa->ready_flag) {
sipa->connection_err = SoundIoErrorBackendDisconnected;
} else {
sipa->connection_err = SoundIoErrorInitAudioBackend;
sipa->ready_flag = true;
}
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
return;
}
}
static void notify_devices_change(SoundIoPrivate *si) {
SoundIo *soundio = &si->pub;
SoundIoJack *sij = &si->backend_data.jack;
sij->refresh_devices_flag.clear();
soundio_os_mutex_lock(sij->mutex);
soundio_os_cond_signal(sij->cond, sij->mutex);
soundio->on_events_signal(soundio);
soundio_os_mutex_unlock(sij->mutex);
}
static void force_device_scan_pa(SoundIoPrivate *si) {
SoundIo *soundio = &si->pub;
SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
pa_threaded_mainloop_lock(sipa->main_loop);
sipa->device_scan_queued = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
pa_threaded_mainloop_unlock(sipa->main_loop);
}
static void shutdown_callback(void *arg) {
SoundIoPrivate *si = (SoundIoPrivate *)arg;
SoundIo *soundio = &si->pub;
SoundIoJack *sij = &si->backend_data.jack;
soundio_os_mutex_lock(sij->mutex);
sij->is_shutdown = true;
soundio_os_cond_signal(sij->cond, sij->mutex);
soundio->on_events_signal(soundio);
soundio_os_mutex_unlock(sij->mutex);
}
static void subscribe_callback(pa_context *context,
pa_subscription_event_type_t event_bits, uint32_t index, void *userdata)
{
SoundIoPrivate *si = (SoundIoPrivate *)userdata;
SoundIo *soundio = &si->pub;
SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
sipa->device_scan_queued = true;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
}
// call this while holding the main loop lock
static int refresh_devices(SoundIoPrivate *si) {
SoundIo *soundio = &si->pub;
SoundIoPulseAudio *sipa = &si->backend_data.pulseaudio;
assert(!sipa->current_devices_info);
sipa->current_devices_info = allocate<SoundIoDevicesInfo>(1);
if (!sipa->current_devices_info)
return SoundIoErrorNoMem;
pa_operation *list_sink_op = pa_context_get_sink_info_list(sipa->pulse_context, sink_info_callback, si);
pa_operation *list_source_op = pa_context_get_source_info_list(sipa->pulse_context, source_info_callback, si);
pa_operation *server_info_op = pa_context_get_server_info(sipa->pulse_context, server_info_callback, si);
int err;
if ((err = perform_operation(si, list_sink_op))) {
return err;
}
if ((err = perform_operation(si, list_source_op))) {
return err;
}
if ((err = perform_operation(si, server_info_op))) {
return err;
}
if (sipa->device_query_err) {
return sipa->device_query_err;
}
// based on the default sink name, figure out the default output index
// if the name doesn't match just pick the first one. if there are no
// devices then we need to set it to -1.
sipa->current_devices_info->default_output_index = -1;
sipa->current_devices_info->default_input_index = -1;
if (sipa->current_devices_info->input_devices.length > 0) {
sipa->current_devices_info->default_input_index = 0;
for (int i = 0; i < sipa->current_devices_info->input_devices.length; i += 1) {
SoundIoDevice *device = sipa->current_devices_info->input_devices.at(i);
assert(device->aim == SoundIoDeviceAimInput);
if (strcmp(device->id, sipa->default_source_name) == 0) {
sipa->current_devices_info->default_input_index = i;
}
}
}
if (sipa->current_devices_info->output_devices.length > 0) {
sipa->current_devices_info->default_output_index = 0;
for (int i = 0; i < sipa->current_devices_info->output_devices.length; i += 1) {
SoundIoDevice *device = sipa->current_devices_info->output_devices.at(i);
assert(device->aim == SoundIoDeviceAimOutput);
if (strcmp(device->id, sipa->default_sink_name) == 0) {
sipa->current_devices_info->default_output_index = i;
}
}
}
soundio_destroy_devices_info(sipa->ready_devices_info);
sipa->ready_devices_info = sipa->current_devices_info;
sipa->current_devices_info = nullptr;
pa_threaded_mainloop_signal(sipa->main_loop, 0);
soundio->on_events_signal(soundio);
return 0;
}