Repo created

TMessagesProj/jni/voip/libtgvoip/MediaStreamItf.h

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+//
+// libtgvoip is free and unencumbered public domain software.
+// For more information, see http://unlicense.org or the UNLICENSE file
+// you should have received with this source code distribution.
+//
+
+#ifndef LIBTGVOIP_MEDIASTREAMINPUT_H
+#define LIBTGVOIP_MEDIASTREAMINPUT_H
+
+#include <string.h>
+#include <vector>
+#include <memory>
+#include <stdint.h>
+#include "threading.h"
+#include "BlockingQueue.h"
+#include "Buffers.h"
+
+namespace tgvoip{
+
+	class EchoCanceller;
+
+class MediaStreamItf{
+public:
+	virtual void Start()=0;
+	virtual void Stop()=0;
+	void SetCallback(size_t (*f)(unsigned char*, size_t, void*), void* param);
+
+//protected:
+	size_t InvokeCallback(unsigned char* data, size_t length);
+
+private:
+	size_t (*callback)(unsigned char*, size_t, void*)=NULL;
+	void* callbackParam;
+};
+
+	class AudioMixer : public MediaStreamItf{
+	public:
+		AudioMixer();
+		virtual ~AudioMixer();
+		void SetOutput(MediaStreamItf* output);
+		virtual void Start();
+		virtual void Stop();
+		void AddInput(std::shared_ptr<MediaStreamItf> input);
+		void RemoveInput(std::shared_ptr<MediaStreamItf> input);
+		void SetInputVolume(std::shared_ptr<MediaStreamItf> input, float volumeDB);
+		void SetEchoCanceller(EchoCanceller* aec);
+	private:
+		void RunThread();
+		struct MixerInput{
+			std::shared_ptr<MediaStreamItf> source;
+			float multiplier;
+		};
+		Mutex inputsMutex;
+		void DoCallback(unsigned char* data, size_t length);
+		static size_t OutputCallback(unsigned char* data, size_t length, void* arg);
+		std::vector<MixerInput> inputs;
+		Thread* thread;
+		BufferPool bufferPool;
+		BlockingQueue<unsigned char*> processedQueue;
+		Semaphore semaphore;
+		EchoCanceller* echoCanceller;
+		bool running;
+	};
+
+	class CallbackWrapper : public MediaStreamItf{
+	public:
+		CallbackWrapper(){};
+		virtual ~CallbackWrapper(){};
+		virtual void Start(){};
+		virtual void Stop(){};
+
+	};
+
+	class AudioLevelMeter{
+	public:
+		AudioLevelMeter();
+		float GetLevel();
+		void Update(int16_t* samples, size_t count);
+	private:
+		int16_t absMax;
+		int16_t count;
+		int8_t currentLevel;
+		int16_t currentLevelFullRange;
+	};
+};
+
+
+#endif //LIBTGVOIP_MEDIASTREAMINPUT_H