Support audio-only FFmpeg inputs. Somewhat wonky, though.

[nageru] / audio_mixer.h

diff --git a/audio_mixer.h b/audio_mixer.h
index 17f95280e28eba8a9a85756cb24c626a6f3f858c..9793646c9bac3493651e39643a610c7df75c5d0f 100644 (file)
--- a/audio_mixer.h
+++ b/audio_mixer.h
@@ -46,7 +46,7 @@ enum EQBand {
 
 class AudioMixer {
 public:
-       AudioMixer(unsigned num_cards);
+       AudioMixer(unsigned num_capture_cards, unsigned num_ffmpeg_inputs);
        void reset_resampler(DeviceSpec device_spec);
        void reset_meters();
 
@@ -142,6 +142,18 @@ public:
                return locut_enabled[bus];
        }
 
+       bool is_mono(unsigned bus_index);
+
+       void set_stereo_width(unsigned bus_index, float width)
+       {
+               stereo_width[bus_index] = width;
+       }
+
+       float get_stereo_width(unsigned bus_index)
+       {
+               return stereo_width[bus_index];
+       }
+
        void set_eq(unsigned bus_index, EQBand band, float db_gain)
        {
                assert(band >= 0 && band < NUM_EQ_BANDS);
@@ -289,6 +301,7 @@ public:
                float fader_volume_db;
                bool muted;
                bool locut_enabled;
+               float stereo_width;
                float eq_level_db[NUM_EQ_BANDS];
                float gain_staging_db;
                bool level_compressor_enabled;
@@ -317,7 +330,7 @@ private:
        AudioDevice *find_audio_device(DeviceSpec device_spec);
 
        void find_sample_src_from_device(const std::map<DeviceSpec, std::vector<float>> &samples_card, DeviceSpec device_spec, int source_channel, const float **srcptr, unsigned *stride);
-       void fill_audio_bus(const std::map<DeviceSpec, std::vector<float>> &samples_card, const InputMapping::Bus &bus, unsigned num_samples, float *output);
+       void fill_audio_bus(const std::map<DeviceSpec, std::vector<float>> &samples_card, const InputMapping::Bus &bus, unsigned num_samples, float stereo_width, float *output);
        void reset_resampler_mutex_held(DeviceSpec device_spec);
        void apply_eq(unsigned bus_index, std::vector<float> *samples_bus);
        void update_meters(const std::vector<float> &samples);
@@ -327,13 +340,14 @@ private:
        std::vector<DeviceSpec> get_active_devices() const;
        void set_input_mapping_lock_held(const InputMapping &input_mapping);
 
-       unsigned num_cards;
+       unsigned num_capture_cards, num_ffmpeg_inputs;
 
        mutable std::timed_mutex audio_mutex;
 
        ALSAPool alsa_pool;
        AudioDevice video_cards[MAX_VIDEO_CARDS];  // Under audio_mutex.
        AudioDevice alsa_inputs[MAX_ALSA_CARDS];  // Under audio_mutex.
+       std::unique_ptr<AudioDevice[]> ffmpeg_inputs;  // Under audio_mutex.
 
        std::atomic<float> locut_cutoff_hz{120};
        StereoFilter locut[MAX_BUSES];  // Default cutoff 120 Hz, 24 dB/oct.
@@ -375,6 +389,7 @@ private:
        std::atomic<float> fader_volume_db[MAX_BUSES] {{ 0.0f }};
        std::atomic<bool> mute[MAX_BUSES] {{ false }};
        float last_fader_volume_db[MAX_BUSES] { 0.0f };  // Under audio_mutex.
+       std::atomic<float> stereo_width[MAX_BUSES] {{ 0.0f }};  // Default 1.0f (is set in constructor).
        std::atomic<float> eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{{ 0.0f }}};
        float last_eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{ 0.0f }};