X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=audio_mixer.h;h=c332671e0bebd6f385d66b8ddc40fd426fd765ad;hb=1062c5403b57859c219558e736564a3d0bbecfd5;hp=30675b88b6f8bfbb5cddbaf635bee42ebb97da33;hpb=320956d2f4d88d0a682bada136aaf7d5f7cbdace;p=nageru diff --git a/audio_mixer.h b/audio_mixer.h index 30675b8..c332671 100644 --- a/audio_mixer.h +++ b/audio_mixer.h @@ -7,9 +7,6 @@ // all together into one final audio signal. // // All operations on AudioMixer (except destruction) are thread-safe. -// -// TODO: There might be more audio stuff that should be moved here -// from Mixer. #include #include @@ -19,10 +16,14 @@ #include #include #include +#include +#include "alsa_input.h" #include "bmusb/bmusb.h" +#include "correlation_measurer.h" #include "db.h" #include "defs.h" +#include "ebu_r128_proc.h" #include "filter.h" #include "resampling_queue.h" #include "stereocompressor.h" @@ -31,7 +32,7 @@ namespace bmusb { struct AudioFormat; } // namespace bmusb -enum class InputSourceType { SILENCE, CAPTURE_CARD }; +enum class InputSourceType { SILENCE, CAPTURE_CARD, ALSA_INPUT }; struct DeviceSpec { InputSourceType type; unsigned index; @@ -51,6 +52,13 @@ struct DeviceInfo { unsigned num_channels; }; +enum EQBand { + EQ_BAND_BASS = 0, + EQ_BAND_MID, + EQ_BAND_TREBLE, + NUM_EQ_BANDS +}; + static inline uint64_t DeviceSpec_to_key(const DeviceSpec &device_spec) { return (uint64_t(device_spec.type) << 32) | device_spec.index; @@ -74,15 +82,19 @@ struct InputMapping { class AudioMixer { public: AudioMixer(unsigned num_cards); + ~AudioMixer(); void reset_resampler(DeviceSpec device_spec); + void reset_meters(); - // frame_length is in TIMEBASE units. - 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 get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy); + // Add audio (or silence) to the given device's queue. Can return false if + // the lock wasn't successfully taken; if so, you should simply try again. + // (This is to avoid a deadlock where a card hangs on the mutex in add_audio() + // while we are trying to shut it down from another thread that also holds + // the mutex.) frame_length is in TIMEBASE units. + 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); - // See comments inside get_output(). - void set_current_loudness(double level_lufs) { loudness_lufs = level_lufs; } + std::vector 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; } std::map get_devices() const; @@ -96,14 +108,20 @@ public: locut_cutoff_hz = cutoff_hz; } - void set_locut_enabled(bool enabled) + void set_locut_enabled(unsigned bus, bool enabled) { - locut_enabled = enabled; + locut_enabled[bus] = enabled; } - bool get_locut_enabled() const + bool get_locut_enabled(unsigned bus) { - return locut_enabled; + return locut_enabled[bus]; + } + + void set_eq(unsigned bus_index, EQBand band, float db_gain) + { + assert(band >= 0 && band < NUM_EQ_BANDS); + eq_level_db[bus_index][band] = db_gain; } float get_limiter_threshold_dbfs() const @@ -111,9 +129,9 @@ public: return limiter_threshold_dbfs; } - float get_compressor_threshold_dbfs() const + float get_compressor_threshold_dbfs(unsigned bus_index) const { - return compressor_threshold_dbfs; + return compressor_threshold_dbfs[bus_index]; } void set_limiter_threshold_dbfs(float threshold_dbfs) @@ -121,9 +139,9 @@ public: limiter_threshold_dbfs = threshold_dbfs; } - void set_compressor_threshold_dbfs(float threshold_dbfs) + void set_compressor_threshold_dbfs(unsigned bus_index, float threshold_dbfs) { - compressor_threshold_dbfs = threshold_dbfs; + compressor_threshold_dbfs[bus_index] = threshold_dbfs; } void set_limiter_enabled(bool enabled) @@ -136,39 +154,39 @@ public: return limiter_enabled; } - void set_compressor_enabled(bool enabled) + void set_compressor_enabled(unsigned bus_index, bool enabled) { - compressor_enabled = enabled; + compressor_enabled[bus_index] = enabled; } - bool get_compressor_enabled() const + bool get_compressor_enabled(unsigned bus_index) const { - return compressor_enabled; + return compressor_enabled[bus_index]; } - void set_gain_staging_db(float gain_db) + void set_gain_staging_db(unsigned bus_index, float gain_db) { std::unique_lock lock(compressor_mutex); - level_compressor_enabled = false; - gain_staging_db = gain_db; + level_compressor_enabled[bus_index] = false; + gain_staging_db[bus_index] = gain_db; } - float get_gain_staging_db() const + float get_gain_staging_db(unsigned bus_index) const { std::unique_lock lock(compressor_mutex); - return gain_staging_db; + return gain_staging_db[bus_index]; } - void set_gain_staging_auto(bool enabled) + void set_gain_staging_auto(unsigned bus_index, bool enabled) { std::unique_lock lock(compressor_mutex); - level_compressor_enabled = enabled; + level_compressor_enabled[bus_index] = enabled; } - bool get_gain_staging_auto() const + bool get_gain_staging_auto(unsigned bus_index) const { std::unique_lock lock(compressor_mutex); - return level_compressor_enabled; + return level_compressor_enabled[bus_index]; } void set_final_makeup_gain_db(float gain_db) @@ -196,6 +214,26 @@ public: return final_makeup_gain_auto; } + void reset_peak(unsigned bus_index); + + struct BusLevel { + float current_level_dbfs[2]; // Digital peak of last frame, left and right. + float peak_level_dbfs[2]; // Digital peak with hold, left and right. + float historic_peak_dbfs; + float gain_staging_db; + float compressor_attenuation_db; // A positive number; 0.0 for no attenuation. + }; + + typedef std::function bus_levels, + float global_level_lufs, float range_low_lufs, float range_high_lufs, + float final_makeup_gain_db, + float correlation)> audio_level_callback_t; + void set_audio_level_callback(audio_level_callback_t callback) + { + audio_level_callback = callback; + } + private: struct AudioDevice { std::unique_ptr resampling_queue; @@ -204,47 +242,77 @@ private: unsigned capture_frequency = OUTPUT_FREQUENCY; // Which channels we consider interesting (ie., are part of some input_mapping). std::set interesting_channels; + // Only used for ALSA cards, obviously. + std::unique_ptr alsa_device; }; AudioDevice *find_audio_device(DeviceSpec device_spec); void find_sample_src_from_device(const std::map> &samples_card, DeviceSpec device_spec, int source_channel, const float **srcptr, unsigned *stride); void fill_audio_bus(const std::map> &samples_card, const InputMapping::Bus &bus, unsigned num_samples, float *output); void reset_resampler_mutex_held(DeviceSpec device_spec); + void reset_alsa_mutex_held(DeviceSpec device_spec); std::map get_devices_mutex_held() const; + void apply_eq(unsigned bus_index, std::vector *samples_bus); + void update_meters(const std::vector &samples); + void add_bus_to_master(unsigned bus_index, const std::vector &samples_bus, std::vector *samples_out); + void measure_bus_levels(unsigned bus_index, const std::vector &left, const std::vector &right); + void send_audio_level_callback(); unsigned num_cards; - mutable std::mutex audio_mutex; + mutable std::timed_mutex audio_mutex; AudioDevice video_cards[MAX_VIDEO_CARDS]; // Under audio_mutex. - StereoFilter locut; // Default cutoff 120 Hz, 24 dB/oct. + // TODO: Figure out a better way to unify these two, as they are sharing indexing. + AudioDevice alsa_inputs[MAX_ALSA_CARDS]; // Under audio_mutex. + std::vector available_alsa_cards; + std::atomic locut_cutoff_hz; - std::atomic locut_enabled{true}; + StereoFilter locut[MAX_BUSES]; // Default cutoff 120 Hz, 24 dB/oct. + std::atomic locut_enabled[MAX_BUSES]; + StereoFilter eq[MAX_BUSES][NUM_EQ_BANDS]; // The one for EQBand::MID isn't actually used (see comments in apply_eq()). // First compressor; takes us up to about -12 dBFS. mutable std::mutex compressor_mutex; - StereoCompressor level_compressor; // Under compressor_mutex. Used to set/override gain_staging_db if . - float gain_staging_db = 0.0f; // Under compressor_mutex. - bool level_compressor_enabled = true; // Under compressor_mutex. + std::unique_ptr level_compressor[MAX_BUSES]; // Under compressor_mutex. Used to set/override gain_staging_db if . + float gain_staging_db[MAX_BUSES]; // Under compressor_mutex. + bool level_compressor_enabled[MAX_BUSES]; // Under compressor_mutex. static constexpr float ref_level_dbfs = -14.0f; // Chosen so that we end up around 0 LU in practice. static constexpr float ref_level_lufs = -23.0f; // 0 LU, more or less by definition. - std::atomic loudness_lufs{ref_level_lufs}; - StereoCompressor limiter; std::atomic limiter_threshold_dbfs{ref_level_dbfs + 4.0f}; // 4 dB. std::atomic limiter_enabled{true}; - StereoCompressor compressor; - std::atomic compressor_threshold_dbfs{ref_level_dbfs - 12.0f}; // -12 dB. - std::atomic compressor_enabled{true}; + std::unique_ptr compressor[MAX_BUSES]; + std::atomic compressor_threshold_dbfs[MAX_BUSES]; + std::atomic compressor_enabled[MAX_BUSES]; + + // Note: The values here are not in dB. + struct PeakHistory { + float current_level = 0.0f; // Peak of the last frame. + float historic_peak = 0.0f; // Highest peak since last reset; no falloff. + float current_peak = 0.0f; // Current peak of the peak meter. + float last_peak = 0.0f; + float age_seconds = 0.0f; // Time since "last_peak" was set. + }; + PeakHistory peak_history[MAX_BUSES][2]; // Separate for each channel. Under audio_mutex. 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. InputMapping input_mapping; // Under audio_mutex. std::atomic fader_volume_db[MAX_BUSES] {{ 0.0f }}; + float last_fader_volume_db[MAX_BUSES] { 0.0f }; // Under audio_mutex. + std::atomic eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{{ 0.0f }}}; + + audio_level_callback_t audio_level_callback = nullptr; + mutable std::mutex audio_measure_mutex; + Ebu_r128_proc r128; // Under audio_measure_mutex. + CorrelationMeasurer correlation; // Under audio_measure_mutex. + Resampler peak_resampler; // Under audio_measure_mutex. + std::atomic peak{0.0f}; }; #endif // !defined(_AUDIO_MIXER_H)