#include <math.h>
#include <stdint.h>
#include <atomic>
+#include <map>
#include <memory>
#include <mutex>
+#include <set>
#include <vector>
#include "bmusb/bmusb.h"
} // namespace bmusb
enum class InputSourceType { SILENCE, CAPTURE_CARD };
+struct DeviceSpec {
+ InputSourceType type;
+ unsigned index;
+
+ bool operator== (const DeviceSpec &other) const {
+ return type == other.type && index == other.index;
+ }
+
+ bool operator< (const DeviceSpec &other) const {
+ if (type != other.type)
+ return type < other.type;
+ return index < other.index;
+ }
+};
+
+static inline uint64_t DeviceSpec_to_key(const DeviceSpec &device_spec)
+{
+ return (uint64_t(device_spec.type) << 32) | device_spec.index;
+}
+
+static inline DeviceSpec key_to_DeviceSpec(uint64_t key)
+{
+ return DeviceSpec{ InputSourceType(key >> 32), unsigned(key & 0xffffffff) };
+}
struct InputMapping {
- struct Input {
+ struct Bus {
std::string name;
- InputSourceType input_source_type;
- unsigned input_source_index;
+ DeviceSpec device;
int source_channel[2] { -1, -1 }; // Left and right. -1 = none.
};
- std::vector<Input> inputs;
+ std::vector<Bus> buses;
};
class AudioMixer {
public:
AudioMixer(unsigned num_cards);
- void reset_card(unsigned card_index);
+ void reset_device(DeviceSpec device_spec);
// frame_length is in TIMEBASE units.
- void add_audio(unsigned card_index, const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length);
- void add_silence(unsigned card_index, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length);
+ void add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length);
+ void add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length);
std::vector<float> get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy);
// See comments inside get_output().
void set_current_loudness(double level_lufs) { loudness_lufs = level_lufs; }
- void set_fader_volume(unsigned card_index, float level_db) { cards[card_index].fader_volume_db = level_db; }
- std::vector<std::string> get_names() const;
- void set_name(unsigned card_index, const std::string &name);
+ void set_fader_volume(unsigned bus_index, float level_db) { fader_volume_db[bus_index] = level_db; }
+ std::map<DeviceSpec, std::string> get_names() const;
+ void set_name(DeviceSpec device_spec, const std::string &name);
void set_input_mapping(const InputMapping &input_mapping);
InputMapping get_input_mapping() const;
}
private:
- unsigned num_cards;
-
- struct CaptureCard {
- std::atomic<float> fader_volume_db{0.0f};
-
- // Everything below audio_mutex is protected by it.
- mutable std::mutex audio_mutex;
+ struct AudioDevice {
std::unique_ptr<ResamplingQueue> resampling_queue;
int64_t next_local_pts = 0;
std::string name;
+ unsigned capture_frequency = OUTPUT_FREQUENCY;
+ // Which channels we consider interesting (ie., are part of some input_mapping).
+ std::set<unsigned> interesting_channels;
};
- CaptureCard cards[MAX_CARDS];
+ AudioDevice *find_audio_device(DeviceSpec device_spec);
+
+ void find_sample_src_from_device(const std::vector<float> *samples_card, DeviceSpec device_spec, int source_channel, const float **srcptr, unsigned *stride);
+ void fill_audio_bus(const std::vector<float> *samples_card, const InputMapping::Bus &bus, unsigned num_samples, float *output);
+ void reset_device_mutex_held(DeviceSpec device_spec);
+
+ unsigned num_cards;
+
+ mutable std::mutex audio_mutex;
+
+ AudioDevice cards[MAX_CARDS]; // Under audio_mutex.
StereoFilter locut; // Default cutoff 120 Hz, 24 dB/oct.
std::atomic<float> locut_cutoff_hz;
double final_makeup_gain = 1.0; // Under compressor_mutex. Read/write by the user. Note: Not in dB, we want the numeric precision so that we can change it slowly.
bool final_makeup_gain_auto = true; // Under compressor_mutex.
- mutable std::mutex mapping_mutex;
- InputMapping input_mapping; // Under mapping_mutex.
+ InputMapping input_mapping; // Under audio_mutex.
+ std::atomic<float> fader_volume_db[MAX_BUSES] {{ 0.0f }};
};
#endif // !defined(_AUDIO_MIXER_H)