libgui/source/sounds/SoundDecoder.hpp

/***************************************************************************
 * Copyright (C) 2010
 * by Dimok
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any
 * damages arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any
 * purpose, including commercial applications, and to alter it and
 * redistribute it freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you
 * must not claim that you wrote the original software. If you use
 * this software in a product, an acknowledgment in the product
 * documentation would be appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and
 * must not be misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source
 * distribution.
 *
 * for WiiXplorer 2010
 ***************************************************************************/
#ifndef SOUND_DECODER_HPP
#define SOUND_DECODER_HPP

#include <fs/CFile.hpp>
#include <system/CMutex.h>
#include "BufferCircle.hpp"

class SoundDecoder
{
public:
	SoundDecoder();
	SoundDecoder(const std::string & filepath);
	SoundDecoder(const u8 * buffer, s32 size);
	virtual ~SoundDecoder();
	virtual void Lock() { mutex.lock(); }
	virtual void Unlock() { mutex.unlock(); }
	virtual s32 Read(u8 * buffer, s32 buffer_size, s32 pos);
	virtual s32 Tell() { return CurPos; }
	virtual s32 Seek(s32 pos) { CurPos = pos; return file_fd->seek(CurPos, SEEK_SET); }
	virtual s32 Rewind();
	virtual u16 GetFormat() { return Format; }
	virtual u16 GetSampleRate() { return SampleRate; }
	virtual void Decode();
	virtual bool IsBufferReady() { return SoundBuffer.IsBufferReady(); }
	virtual u8 * GetBuffer() { return SoundBuffer.GetBuffer(); }
	virtual u32 GetBufferSize() { return SoundBuffer.GetBufferSize(); }
	virtual void LoadNext() { SoundBuffer.LoadNext(); }
	virtual bool IsEOF() { return EndOfFile; }
	virtual void SetLoop(bool l) { Loop = l; EndOfFile = false; }
	virtual u8 GetSoundType() { return SoundType; }
	virtual void ClearBuffer() { SoundBuffer.ClearBuffer(); whichLoad = 0; }
	virtual bool IsStereo() { return (GetFormat() & CHANNELS_STEREO) != 0; }
	virtual bool Is16Bit() { return ((GetFormat() & 0xFF) == FORMAT_PCM_16_BIT); }
	virtual bool IsDecoding() { return Decoding; }

	void EnableUpsample(void);

	enum SoundFormats
	{
	    FORMAT_PCM_16_BIT   = 0x0A,
	    FORMAT_PCM_8_BIT    = 0x19,
	};
	enum SoundChannels
	{
	    CHANNELS_MONO       = 0x100,
	    CHANNELS_STEREO     = 0x200
	};

    enum SoundType
    {
        SOUND_RAW = 0,
        SOUND_MP3,
        SOUND_OGG,
        SOUND_WAV
    };
protected:
	void Init();
	void Upsample(s16 *src, s16 *dst, u32 nr_src_samples, u32 nr_dst_samples);

	CFile * file_fd;
	BufferCircle SoundBuffer;
	u8 SoundType;
	u16 whichLoad;
	u16 SoundBlocks;
	s32 SoundBlockSize;
	s32 CurPos;
	bool ResampleTo48kHz;
	bool Loop;
	bool EndOfFile;
	bool Decoding;
	bool ExitRequested;
	u16 Format;
	u16 SampleRate;
	u8 *ResampleBuffer;
	u32 ResampleRatio;
	CMutex mutex;
};


#endif