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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| find_path(SWRESAMPLE_INCLUDE_DIR | ||
| NAMES libswresample/swresample.h) | ||
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| find_library(SWRESAMPLE_LIBRARY | ||
| NAMES swresample) | ||
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| set(SWRESAMPLE_LIBRARIES ${SWRESAMPLE_LIBRARY}) | ||
| set(SWRESAMPLE_INCLUDE_DIRS ${SWRESAMPLE_INCLUDE_DIR}) | ||
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| include(FindPackageHandleStandardArgs) | ||
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| find_package_handle_standard_args(SWRESAMPLE DEFAULT_MSG SWRESAMPLE_LIBRARY SWRESAMPLE_INCLUDE_DIR) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| #include "Util/logger.h" | ||
| #include "AudioSRC.h" | ||
| #include "SDLAudioDevice.h" | ||
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| using namespace std; | ||
| using namespace toolkit; | ||
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| AudioSRC::AudioSRC(AudioSRCDelegate *del) { | ||
| _delegate = del; | ||
| } | ||
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| AudioSRC::~AudioSRC() {} | ||
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| void AudioSRC::setOutputAudioConfig(const SDL_AudioSpec &cfg) { | ||
| int freq = _delegate->getPCMSampleRate(); | ||
| int format = _delegate->getPCMFormat(); | ||
| int channels = _delegate->getPCMChannel(); | ||
| if (-1 == SDL_BuildAudioCVT(&_audio_cvt, format, channels, freq, cfg.format, cfg.channels, cfg.freq)) { | ||
| throw std::runtime_error("the format conversion is not supported"); | ||
| } | ||
| InfoL << "audio cvt origin format, freq:" << freq << ", format:" << hex << format << dec << ", channels:" << channels; | ||
| InfoL << "audio cvt info, " | ||
| << "needed:" << _audio_cvt.needed | ||
| << ", src_format:" << hex << _audio_cvt.src_format | ||
| << ", dst_format:" << _audio_cvt.dst_format << dec | ||
| << ", rate_incr:" << _audio_cvt.rate_incr | ||
| << ", len_mult:" << _audio_cvt.len_mult | ||
| << ", len_ratio:" << _audio_cvt.len_ratio; | ||
| } | ||
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| void AudioSRC::setEnableMix(bool flag) { | ||
| _enabled = flag; | ||
| } | ||
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| int AudioSRC::getPCMData(char *buf, int size) { | ||
| if (!_enabled) { | ||
| return 0; | ||
| } | ||
| if (!_audio_cvt.needed) { | ||
| //获取原始数据，不需要频率转换 | ||
| return _delegate->getPCMData(buf, size); | ||
| } | ||
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| if ((int)(size / _audio_cvt.len_ratio) != _origin_size) { | ||
| _origin_size = size / _audio_cvt.len_ratio; | ||
| _origin_buf.reset(new char[std::max(_origin_size, size)], [](char *ptr) { | ||
| delete[] ptr; | ||
| }); | ||
| InfoL << "origin pcm buffer size is:" << _origin_size << ", target pcm buffer size is:" << size; | ||
| } | ||
|
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| auto origin_size = _delegate->getPCMData(_origin_buf.get(), _origin_size); | ||
| if (!origin_size) { | ||
| //获取数据失败 | ||
| TraceL << "get empty pcm data"; | ||
| return 0; | ||
| } | ||
|
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| _audio_cvt.buf = (Uint8 *) _origin_buf.get(); | ||
| _audio_cvt.len = origin_size; | ||
| if (0 != SDL_ConvertAudio(&_audio_cvt)) { | ||
| WarnL << "SDL_ConvertAudio failed!"; | ||
| _audio_cvt.len_cvt = 0; | ||
| } | ||
| if (_audio_cvt.len_cvt) { | ||
| _target_buf.append(_origin_buf.get(), _audio_cvt.len_cvt); | ||
| } | ||
| if (_target_buf.size() < size) { | ||
| return 0; | ||
| } | ||
| memcpy(buf, _target_buf.data(), size); | ||
| _target_buf.erase(0, size); | ||
| return size; | ||
| } | ||
|
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| //////////////////////////////////////////////////////////////////////// | ||
|
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| AudioPlayer::AudioPlayer() : AudioSRC(this) { | ||
| _device = SDLAudioDevice::Instance().shared_from_this(); | ||
| } | ||
|
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| AudioPlayer::~AudioPlayer() { | ||
| _device->delChannel(this); | ||
| } | ||
|
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| void AudioPlayer::setup(int sample_rate, int channel, SDL_AudioFormat format) { | ||
| _sample_rate = sample_rate; | ||
| _channel = channel; | ||
| _format = format; | ||
| _device->addChannel(this); | ||
| } | ||
|
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| SDL_AudioFormat AudioPlayer::getPCMFormat() { | ||
| return _format; | ||
| } | ||
|
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| int AudioPlayer::getPCMSampleRate() { | ||
| return _sample_rate; | ||
| } | ||
|
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| int AudioPlayer::getPCMChannel() { | ||
| return _channel; | ||
| } | ||
|
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| int AudioPlayer::getPCMData(char *buf, int size) { | ||
| if (_buffer.size() < size) { | ||
| return 0; | ||
| } | ||
| memcpy(buf, _buffer.data(), size); | ||
| _buffer.erase(0, size); | ||
| return size; | ||
| } | ||
|
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| void AudioPlayer::inputFrame(const char *data, size_t size){ | ||
| _buffer.append(data, size); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| #ifndef AUDIOSRC_H_ | ||
| #define AUDIOSRC_H_ | ||
|
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| #include <memory> | ||
| #include <string> | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
| #include "SDL2/SDL.h" | ||
| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #if defined(_WIN32) | ||
| #pragma comment(lib,"SDL2.lib") | ||
| #endif //defined(_WIN32) | ||
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| #include "Network/Buffer.h" | ||
| #include "SDLAudioDevice.h" | ||
| #include "FFMpegDecoder.h" | ||
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| using namespace std; | ||
| using namespace toolkit; | ||
|
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| 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; | ||
| }; | ||
|
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| //该类实现pcm的重采样 | ||
| class AudioSRC { | ||
| public: | ||
| typedef std::shared_ptr<AudioSRC> Ptr; | ||
| AudioSRC(AudioSRCDelegate *); | ||
| virtual ~AudioSRC(); | ||
|
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| void setEnableMix(bool flag); | ||
| void setOutputAudioConfig(const SDL_AudioSpec &cfg); | ||
| int getPCMData(char *buf, int size); | ||
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| private: | ||
| bool _enabled = true; | ||
| int _origin_size = 0; | ||
| std::shared_ptr<char> _origin_buf; | ||
| AudioSRCDelegate *_delegate = nullptr; | ||
| BufferLikeString _target_buf; | ||
| SDL_AudioCVT _audio_cvt; | ||
| }; | ||
|
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| class AudioPlayer : public AudioSRC, private AudioSRCDelegate{ | ||
| public: | ||
| AudioPlayer(); | ||
| ~AudioPlayer() override; | ||
|
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| void setup(int sample_rate, int channel, SDL_AudioFormat format); | ||
| void inputFrame(const char *data, size_t size); | ||
|
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| private: | ||
| SDL_AudioFormat getPCMFormat() override; | ||
| int getPCMSampleRate() override; | ||
| int getPCMChannel() override; | ||
| int getPCMData(char *buf, int size) override; | ||
|
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| private: | ||
| int _sample_rate, _channel; | ||
| SDL_AudioFormat _format; | ||
| BufferLikeString _buffer; | ||
| SDLAudioDevice::Ptr _device; | ||
| }; | ||
|
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| #endif /* AUDIOSRC_H_ */ |
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