usbloadergx/source/libwiigui/gui_sound_decoder.h

/****************************************************************************
 * libwiigui
 *
 * Tantric 2009
 *
 * gui_sound_decoder.h
 *
 * by ardi 2009
 *
 * GUI class definitions
 ***************************************************************************/

#ifndef GUI_SOUND_DECODER_H
#define GUI_SOUND_DECODER_H

#include <gccore.h>

#define REGISTER_GUI_SOUND_DECODER(decoder) GuiSoundDecoder::DecoderListEntry decoder##_l = GuiSoundDecoder::RegisterDecoder(decoder##_l, decoder::Create)
class GuiSoundDecoder;
typedef GuiSoundDecoder *(*GuiSoundDecoderCreate)(const u8 * snd, u32 len, bool snd_is_allocated);

class GuiSoundDecoder
{
protected:
	GuiSoundDecoder(){}; // Constructors must protected so it can create only with Init(...);
public:
	virtual ~GuiSoundDecoder(){};
	// begin API
	// ---------
	// each Decoder must have an own static Create(...) fnc
	// static GuiSoundDecoder *Create(const u8 * snd, u32 len, bool snd_is_allocated);
	virtual s32 GetFormat()=0;
	virtual s32 GetSampleRate()=0;
	/*  Read reads data from stream to buffer
		return:	>0 = readed bytes;
	            0 = EOF;
				<0 = Error;
	*/
	virtual int Read(u8 * buffer, int buffer_size)=0;
	// set the stream to the start
	virtual int Rewind()=0;
	// -------
	// end API
	
	
	struct DecoderListEntry
	{
		GuiSoundDecoderCreate	 fnc;
		DecoderListEntry		*next;
	};
	static DecoderListEntry &RegisterDecoder(DecoderListEntry &Decoder, GuiSoundDecoderCreate fnc);
	static GuiSoundDecoder *GetDecoder(const u8 * snd, u32 len, bool snd_is_allocated);
private:
	static DecoderListEntry *DecoderList;
	GuiSoundDecoder(GuiSoundDecoder&);				// no copy
};

#define BIG_ENDIAN_HOST 1	// Wii PPC is a Big-Endian-Host

#if BIG_ENDIAN_HOST

inline uint16_t be16(const uint8_t *p8)
{
	return *((uint16_t*)p8);
}
inline uint32_t be32(const uint8_t *p8)
{
	return *((uint32_t*)p8);
}
inline uint16_t le16(const uint8_t *p8)
{
	uint16_t ret = p8[1]<<8 | p8[0];
	return ret;
}
inline uint32_t le32(const uint8_t *p8)
{
	uint32_t ret = p8[3]<<24 | p8[2]<<16 | p8[1]<<8 | p8[0];
	return ret;
}

#elif LITTLE_ENDIAN_HOST
inline uint16_t be16(const uint8_t *p8)
{
	uint16_t ret = p8[0]<<8 | p8[1];
	return ret;
}
inline uint32_t be32(const uint8_t *p8)
{
	uint32_t ret = p8[0]<<24 | p8[1]<<16 | p8[2]<<8 | p8[3];
	return ret;
}
inline uint16_t le16(const uint8_t *p8)
{
	return *((uint16_t*)p8);
}
inline uint32_t le32(const uint8_t *p8)
{
	return *((uint32_t*)p8);
}
#else
	#error "BIG_ENDIAN_HOST or LITTLE_ENDIAN_HOST not setted"
#endif /* XXX_ENDIAN_HOST */

#define be16inc(p8)	(p8+=2, be16(p8-2))
#define le16inc(p8)	(p8+=2, le16(p8-2))
#define be32inc(p8)	(p8+=4, be32(p8-4))
#define le32inc(p8)	(p8+=4, le32(p8-4))



#endif /* GUI_SOUND_DECODER_H */