// processing them with effects (if desired), and then mixing them
// all together into one final audio signal.
//
-// All operations on AudioMixer (except destruction) are thread-safe.
+// All operations on AudioMixer, except destruction and set_delay_analyzer(),
+// are thread-safe.
#include <assert.h>
#include <stdint.h>
#include "resampling_queue.h"
#include "stereocompressor.h"
+class DelayAnalyzerInterface;
class DeviceSpecProto;
namespace bmusb {
// Assumes little-endian and chunky, signed PCM throughout.
std::vector<int32_t> convert_audio_to_fixed32(const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, unsigned num_destination_channels);
+// Similar, except converts to floating-point instead, and converts only one channel.
+void convert_audio_to_fp32(float *dst, size_t out_channel, size_t out_num_channels,
+ const uint8_t *src, size_t in_channel, bmusb::AudioFormat in_audio_format,
+ size_t num_samples);
+
enum EQBand {
EQ_BAND_BASS = 0,
EQ_BAND_MID,
bool get_mute(unsigned bus_index) const { return mute[bus_index]; }
void set_mute(unsigned bus_index, bool muted) { mute[bus_index] = muted; }
- // Note: This operation holds all ALSA devices (see ALSAPool::get_devices()).
- // You will need to call set_input_mapping() to get the hold state correctly,
- // or every card will be held forever.
- std::map<DeviceSpec, DeviceInfo> get_devices();
+ enum HoldDevices {
+ HOLD_NO_DEVICES,
+
+ // Note: Holds all ALSA devices (see ALSAPool::get_devices()).
+ // You will need to call set_input_mapping() to get the hold state correctly,
+ // or every card will be held forever.
+ HOLD_ALSA_DEVICES
+ };
+ std::map<DeviceSpec, DeviceInfo> get_devices(HoldDevices hold_devices);
// See comments on ALSAPool::get_card_state().
ALSAPool::Device::State get_alsa_card_state(unsigned index)
MappingMode get_mapping_mode() const;
InputMapping get_input_mapping() const;
+ // See extra_devices.
+ void set_extra_devices(const std::set<DeviceSpec> &devices);
+
unsigned num_buses() const;
void set_locut_cutoff(float cutoff_hz)
BusSettings get_bus_settings(unsigned bus_index) const;
void set_bus_settings(unsigned bus_index, const BusSettings &settings);
+ // Does not take ownership. Not thread-safe (so only call when the mixer is being created).
+ void set_delay_analyzer(DelayAnalyzerInterface *delay_analyzer)
+ {
+ this->delay_analyzer = delay_analyzer;
+ }
+
private:
struct AudioDevice {
std::unique_ptr<ResamplingQueue> resampling_queue;
// Which channels we consider interesting (ie., are part of some input_mapping).
std::set<unsigned> interesting_channels;
bool silenced = false;
+
+ // Positive means the audio is delayed, negative means we try to have it earlier
+ // (although we can't time-travel!). Stored together with the input mapping.
+ double extra_delay_ms = 0.0;
};
const AudioDevice *find_audio_device(DeviceSpec device_spec) const
void send_audio_level_callback();
std::vector<DeviceSpec> get_active_devices() const;
void set_input_mapping_lock_held(const InputMapping &input_mapping);
+ void start_or_stop_alsa_capture(DeviceSpec device_spec);
unsigned num_capture_cards, num_ffmpeg_inputs;
std::atomic<double> compressor_attenuation_db{0.0/0.0};
};
std::unique_ptr<BusMetrics[]> bus_metrics; // One for each bus in <input_mapping>.
+
+ DelayAnalyzerInterface *delay_analyzer = nullptr;
+
+ // A set of devices (potentially empty) that should be kept open even
+ // if they're not used in any bus. This allows the delay analyzer to
+ // make sure a given ALSA device is opened to tap into its data, even if
+ // there is no bus using it. (Non-ALSA devices are allowed to be here,
+ // but won't do anything.)
+ std::set<DeviceSpec> extra_devices;
};
extern AudioMixer *global_audio_mixer;