103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
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//
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// libtgvoip is free and unencumbered public domain software.
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// For more information, see http://unlicense.org or the UNLICENSE file
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// you should have received with this source code distribution.
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//
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#ifndef LIBTGVOIP_MEDIASTREAMINPUT_H
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#define LIBTGVOIP_MEDIASTREAMINPUT_H
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#include "threading.h"
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#include "BlockingQueue.h"
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#include "Buffers.h"
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#include <cstdint>
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#include <functional>
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#include <memory>
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#include <mutex>
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#include <unordered_map>
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namespace tgvoip
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{
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class EchoCanceller;
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class MediaStreamItf
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{
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public:
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using CallbackType = std::function<std::size_t(std::uint8_t*, std::size_t, void*)>;
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virtual void Start() = 0;
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virtual void Stop() = 0;
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void SetCallback(CallbackType callback, void* param);
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std::size_t InvokeCallback(std::uint8_t* data, std::size_t length) const;
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virtual ~MediaStreamItf() = default;
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private:
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mutable std::mutex m_mutexCallback;
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CallbackType m_callback = nullptr;
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void* m_callbackParam = nullptr;
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};
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class AudioMixer : public MediaStreamItf
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{
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public:
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using MediaStreamItfPtr = std::shared_ptr<MediaStreamItf>;
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AudioMixer();
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~AudioMixer() override;
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void SetOutput(MediaStreamItf* output);
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void Start() override;
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void Stop() override;
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void AddInput(MediaStreamItfPtr input);
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void RemoveInput(const MediaStreamItfPtr& input);
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void SetInputVolume(const MediaStreamItfPtr& input, float volumeDB);
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void SetEchoCanceller(EchoCanceller* aec);
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private:
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BufferPool<960 * 2, 16> m_bufferPool;
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BlockingQueue<Buffer> m_processedQueue;
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std::unordered_map<MediaStreamItfPtr, float> m_inputs;
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mutable Mutex m_inputsMutex;
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Semaphore m_semaphore;
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Thread* m_thread = nullptr;
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EchoCanceller* m_echoCanceller = nullptr;
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bool m_running = false;
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void RunThread();
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void DoCallback(std::uint8_t* data, std::size_t length);
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static std::size_t OutputCallback(std::uint8_t* data, std::size_t length, void* arg);
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};
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class CallbackWrapper : public MediaStreamItf
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{
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public:
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CallbackWrapper();
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~CallbackWrapper() override;
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void Start() override;
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void Stop() override;
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};
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class AudioLevelMeter
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{
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public:
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AudioLevelMeter();
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float GetLevel();
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void Update(std::int16_t* samples, std::size_t m_count);
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private:
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std::int16_t m_absMax;
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std::int16_t m_count;
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std::int16_t m_currentLevelFullRange;
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std::int8_t m_currentLevel;
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};
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} // namespace tgvoip
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#endif // LIBTGVOIP_MEDIASTREAMINPUT_H
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