ZLMediaKit/player/AudioSRC.h

87 lines
2.1 KiB
C++
Raw Normal View History

2021-06-29 17:44:35 +08:00
/*
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
*
* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
*
* Use of this source code is governed by MIT license that can be found in the
* LICENSE file in the root of the source tree. All contributing project authors
* may be found in the AUTHORS file in the root of the source tree.
*/
#ifndef AUDIOSRC_H_
#define AUDIOSRC_H_
#include <memory>
#include <string>
#ifdef __cplusplus
extern "C" {
#endif
#include "SDL2/SDL.h"
#ifdef __cplusplus
}
#endif
#if defined(_WIN32)
#pragma comment(lib,"SDL2.lib")
#endif //defined(_WIN32)
#include "Network/Buffer.h"
#include "SDLAudioDevice.h"
#include "FFMpegDecoder.h"
using namespace std;
using namespace toolkit;
class AudioSRCDelegate {
public:
virtual ~AudioSRCDelegate() {};
virtual SDL_AudioFormat getPCMFormat() = 0;
virtual int getPCMSampleRate() = 0;
virtual int getPCMChannel() = 0;
virtual int getPCMData(char *buf, int size) = 0;
};
//该类实现pcm的重采样
class AudioSRC {
public:
typedef std::shared_ptr<AudioSRC> Ptr;
AudioSRC(AudioSRCDelegate *);
virtual ~AudioSRC();
void setEnableMix(bool flag);
void setOutputAudioConfig(const SDL_AudioSpec &cfg);
int getPCMData(char *buf, int size);
private:
bool _enabled = true;
int _origin_size = 0;
std::shared_ptr<char> _origin_buf;
AudioSRCDelegate *_delegate = nullptr;
BufferLikeString _target_buf;
SDL_AudioCVT _audio_cvt;
};
class AudioPlayer : public AudioSRC, private AudioSRCDelegate{
public:
AudioPlayer();
~AudioPlayer() override;
void setup(int sample_rate, int channel, SDL_AudioFormat format);
void inputFrame(const char *data, size_t size);
private:
SDL_AudioFormat getPCMFormat() override;
int getPCMSampleRate() override;
int getPCMChannel() override;
int getPCMData(char *buf, int size) override;
private:
int _sample_rate, _channel;
SDL_AudioFormat _format;
BufferLikeString _buffer;
SDLAudioDevice::Ptr _device;
};
#endif /* AUDIOSRC_H_ */