axmol/cocos/audio/winrt/AudioSourceReader.h

/*
* cocos2d-x   http://www.cocos2d-x.org
*
* Copyright (c) 2010-2011 - cocos2d-x community
*
* Portions Copyright (c) Microsoft Open Technologies, Inc.
* All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and limitations under the License.
*/

#include "base/ccMacros.h"
#include "platform/CCPlatformConfig.h"

#if CC_TARGET_PLATFORM == CC_PLATFORM_WINRT

#ifndef __AUDIO_SOURCE_READER_H_
#define __AUDIO_SOURCE_READER_H_

#define NEAR near
#include <mfapi.h>
#include <mfidl.h>
#include <mfreadwrite.h>
#include <queue>
#include <mutex>
#include "audio/winrt/MediaStreamer.h"
#include "ogg/ogg.h"
#include "vorbis/vorbisfile.h"

NS_CC_BEGIN
namespace experimental{

const size_t PCMDATA_CACHEMAXSIZE = 2621440;
const size_t QUEUEBUFFER_NUM = 4;
const size_t CHUNK_SIZE_MAX = PCMDATA_CACHEMAXSIZE / QUEUEBUFFER_NUM;

typedef std::vector<BYTE> PCMBuffer;

enum class FileFormat
{
    UNKNOWN,
    WAV,
    MP3,
    OGG
};

typedef struct AudioDataChunk
{
    std::shared_ptr<PCMBuffer> _data;
    size_t _dataSize;
    bool _endOfStream;
    int _seqNo;
} AudioDataChunk;


class AudioSourceReader
{
public:
    AudioSourceReader();
    virtual ~AudioSourceReader();

    bool isStreamingSource() { return _isStreaming; }
    std::string getFilePath() { return _filePath; }
    virtual size_t getTotalAudioBytes() { return _audioSize; }
    
    virtual bool initialize(const std::string& filePath) = 0;
    virtual FileFormat getFileFormat() = 0;
    virtual  bool consumeChunk(AudioDataChunk& chunk) = 0;
    virtual  void produceChunk() = 0;
    virtual void seekTo(const float ratio) = 0;
    virtual const WAVEFORMATEX& getWaveFormatInfo() { return _wfx; }

protected:
    void flushChunks();

protected:
    bool _isDirty;
    size_t _bytesRead;
    bool _isStreaming;
    std::string _filePath;
    size_t _audioSize;
    WAVEFORMATEX _wfx;
    std::mutex _rwMutex;
    std::queue<AudioDataChunk> _chnkQ;
};

class WAVReader : public AudioSourceReader
 {
 public:
     WAVReader();
     virtual ~WAVReader();

     virtual bool initialize(const std::string& filePath) override;
     virtual FileFormat getFileFormat() override { return FileFormat::WAV; }
     virtual bool consumeChunk(AudioDataChunk& chunk) override;
     virtual void produceChunk() override;
     virtual void seekTo(const float ratio) override;

 private:
     MediaStreamer^ _streamer;
 };

class MP3Reader : public AudioSourceReader
 {
 public:
     MP3Reader();
     virtual ~MP3Reader();

     virtual bool initialize(const std::string& filePath) override;
     virtual FileFormat getFileFormat() override { return FileFormat::WAV; }
     virtual bool consumeChunk(AudioDataChunk& chunk) override;
     virtual void produceChunk() override;
     virtual void seekTo(const float ratio) override;

     // for backward compatibility with simple audio engine
     void doLargeFileSupport(bool action) { _largeFileSupport = action; }

 protected:
     HRESULT configureSourceReader(IMFSourceReader* pReader, IMFMediaType** ppDecomprsdAudioType);
     HRESULT readAudioData(IMFSourceReader* pReader);
     void chunkify(PCMBuffer& buffer);
     bool appendToMappedWavFile(PCMBuffer& buffer);
     void readFromMappedWavFile(BYTE *data, size_t offset, size_t size, UINT *pRetSize);
     Microsoft::WRL::Wrappers::FileHandle openFile(const std::string& path, bool append = false);

 private:
     bool _largeFileSupport;
     std::string _mappedWavFile;
 };

class OGGReader : public AudioSourceReader
{
public:
    OGGReader();
    virtual ~OGGReader();

    virtual bool initialize(const std::string& filePath) override;
    virtual FileFormat getFileFormat() override { return FileFormat::WAV; }
    virtual bool consumeChunk(AudioDataChunk& chunk) override;
    virtual void produceChunk() override;
    virtual void seekTo(const float ratio) override;

private:
    std::unique_ptr<OggVorbis_File> _vorbisFd;
};

}
NS_CC_END
#endif // __AUDIO_SOURCE_READER_H_
#endif