X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=audio_mixer.h;h=7ae5464d44ab61fe336e28603460f693cc9a33ea;hb=a564f192f808841ad8dfa9a4aa6c8db3335bd6fd;hp=c845a26608aec82a3534826aacb86fd418d2ded1;hpb=a0e27555696d0c63e3d89e31ca8f4292dcf40179;p=nageru

diff --git a/audio_mixer.h b/audio_mixer.h
index c845a26..7ae5464 100644
--- a/audio_mixer.h
+++ b/audio_mixer.h
@@ -25,6 +25,7 @@
 #include "defs.h"
 #include "ebu_r128_proc.h"
 #include "filter.h"
+#include "input_mapping.h"
 #include "resampling_queue.h"
 #include "stereocompressor.h"
 
@@ -32,26 +33,6 @@ namespace bmusb {
 struct AudioFormat;
 }  // namespace bmusb
 
-enum class InputSourceType { SILENCE, CAPTURE_CARD, ALSA_INPUT };
-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;
-	}
-};
-struct DeviceInfo {
-	std::string name;
-	unsigned num_channels;
-};
-
 enum EQBand {
 	EQ_BAND_BASS = 0,
 	EQ_BAND_MID,
@@ -59,26 +40,6 @@ enum EQBand {
 	NUM_EQ_BANDS
 };
 
-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 Bus {
-		std::string name;
-		DeviceSpec device;
-		int source_channel[2] { -1, -1 };  // Left and right. -1 = none.
-	};
-
-	std::vector<Bus> buses;
-};
-
 class AudioMixer {
 public:
 	AudioMixer(unsigned num_cards);
@@ -93,6 +54,13 @@ public:
 	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; }
@@ -108,7 +76,7 @@ public:
 		return alsa_pool.get_card_state(index);
 	}
 
-	void set_name(DeviceSpec device_spec, const std::string &name);
+	void set_display_name(DeviceSpec device_spec, const std::string &name);
 
 	void set_input_mapping(const InputMapping &input_mapping);
 	InputMapping get_input_mapping() const;
@@ -255,14 +223,33 @@ public:
 		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;
 		int64_t next_local_pts = 0;
-		std::string name;
+		std::string display_name;
 		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
@@ -330,6 +317,7 @@ private:
 	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.