bool add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length);
bool add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length);
+ // If a given device is offline for whatever reason and cannot deliver audio
+ // (by means of add_audio() or add_silence()), you can call put it in silence mode,
+ // where it will be taken to only output silence. Note that when taking it _out_
+ // of silence mode, the resampler will be reset, so that old audio will not
+ // affect it. Same true/false behavior as add_audio().
+ bool silence_card(DeviceSpec device_spec, bool silence);
+
std::vector<float> get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy);
void set_fader_volume(unsigned bus_index, float level_db) { fader_volume_db[bus_index] = level_db; }
// or every card will be held forever.
std::map<DeviceSpec, DeviceInfo> get_devices();
+ // See comments on ALSAPool::get_card_state().
+ ALSAPool::Device::State get_alsa_card_state(unsigned index)
+ {
+ return alsa_pool.get_card_state(index);
+ }
+
void set_name(DeviceSpec device_spec, const std::string &name);
void set_input_mapping(const InputMapping &input_mapping);
audio_level_callback = callback;
}
+ typedef std::function<void()> state_changed_callback_t;
+ void set_state_changed_callback(state_changed_callback_t callback)
+ {
+ state_changed_callback = callback;
+ }
+
+ state_changed_callback_t get_state_changed_callback() const
+ {
+ return state_changed_callback;
+ }
+
+ void trigger_state_changed_callback()
+ {
+ if (state_changed_callback != nullptr) {
+ state_changed_callback();
+ }
+ }
+
private:
struct AudioDevice {
std::unique_ptr<ResamplingQueue> resampling_queue;
unsigned capture_frequency = OUTPUT_FREQUENCY;
// Which channels we consider interesting (ie., are part of some input_mapping).
std::set<unsigned> interesting_channels;
+ bool silenced = false;
};
const AudioDevice *find_audio_device(DeviceSpec device_spec) const
std::atomic<float> eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{{ 0.0f }}};
audio_level_callback_t audio_level_callback = nullptr;
+ state_changed_callback_t state_changed_callback = nullptr;
mutable std::mutex audio_measure_mutex;
Ebu_r128_proc r128; // Under audio_measure_mutex.
CorrelationMeasurer correlation; // Under audio_measure_mutex.