mirror of
https://github.com/Maschell/libgui.git
synced 2024-11-30 16:44:20 +01:00
155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
/***************************************************************************
|
|
* 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
|
|
***************************************************************************/
|
|
#include <string.h>
|
|
#include "WavDecoder.hpp"
|
|
#include "utils/utils.h"
|
|
|
|
WavDecoder::WavDecoder(const char * filepath)
|
|
: SoundDecoder(filepath)
|
|
{
|
|
SoundType = SOUND_WAV;
|
|
SampleRate = 48000;
|
|
Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
|
|
|
|
if(!file_fd)
|
|
return;
|
|
|
|
OpenFile();
|
|
}
|
|
|
|
WavDecoder::WavDecoder(const u8 * snd, s32 len)
|
|
: SoundDecoder(snd, len)
|
|
{
|
|
SoundType = SOUND_WAV;
|
|
SampleRate = 48000;
|
|
Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
|
|
|
|
if(!file_fd)
|
|
return;
|
|
|
|
OpenFile();
|
|
}
|
|
|
|
WavDecoder::~WavDecoder()
|
|
{
|
|
}
|
|
|
|
|
|
void WavDecoder::OpenFile()
|
|
{
|
|
SWaveHdr Header;
|
|
SWaveFmtChunk FmtChunk;
|
|
memset(&Header, 0, sizeof(SWaveHdr));
|
|
memset(&FmtChunk, 0, sizeof(SWaveFmtChunk));
|
|
|
|
file_fd->read((u8 *) &Header, sizeof(SWaveHdr));
|
|
file_fd->read((u8 *) &FmtChunk, sizeof(SWaveFmtChunk));
|
|
|
|
if (Header.magicRIFF != 0x52494646) // 'RIFF'
|
|
{
|
|
CloseFile();
|
|
return;
|
|
}
|
|
else if(Header.magicWAVE != 0x57415645) // 'WAVE'
|
|
{
|
|
CloseFile();
|
|
return;
|
|
}
|
|
else if(FmtChunk.magicFMT != 0x666d7420) // 'fmt '
|
|
{
|
|
CloseFile();
|
|
return;
|
|
}
|
|
|
|
DataOffset = sizeof(SWaveHdr)+le32(FmtChunk.size)+8;
|
|
file_fd->seek(DataOffset, SEEK_SET);
|
|
SWaveChunk DataChunk;
|
|
file_fd->read((u8 *) &DataChunk, sizeof(SWaveChunk));
|
|
|
|
while(DataChunk.magicDATA != 0x64617461) // 'data'
|
|
{
|
|
DataOffset += 8+le32(DataChunk.size);
|
|
file_fd->seek(DataOffset, SEEK_SET);
|
|
s32 ret = file_fd->read((u8 *) &DataChunk, sizeof(SWaveChunk));
|
|
if(ret <= 0)
|
|
{
|
|
CloseFile();
|
|
return;
|
|
}
|
|
}
|
|
|
|
DataOffset += 8;
|
|
DataSize = le32(DataChunk.size);
|
|
Is16Bit = (le16(FmtChunk.bps) == 16);
|
|
SampleRate = le32(FmtChunk.freq);
|
|
|
|
if (le16(FmtChunk.channels) == 1 && le16(FmtChunk.bps) == 8 && le16(FmtChunk.alignment) <= 1)
|
|
Format = CHANNELS_MONO | FORMAT_PCM_8_BIT;
|
|
else if (le16(FmtChunk.channels) == 1 && le16(FmtChunk.bps) == 16 && le16(FmtChunk.alignment) <= 2)
|
|
Format = CHANNELS_MONO | FORMAT_PCM_16_BIT;
|
|
else if (le16(FmtChunk.channels) == 2 && le16(FmtChunk.bps) == 8 && le16(FmtChunk.alignment) <= 2)
|
|
Format = CHANNELS_STEREO | FORMAT_PCM_8_BIT;
|
|
else if (le16(FmtChunk.channels) == 2 && le16(FmtChunk.bps) == 16 && le16(FmtChunk.alignment) <= 4)
|
|
Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
|
|
}
|
|
|
|
void WavDecoder::CloseFile()
|
|
{
|
|
if(file_fd)
|
|
delete file_fd;
|
|
|
|
file_fd = NULL;
|
|
}
|
|
|
|
s32 WavDecoder::Read(u8 * buffer, s32 buffer_size, s32 pos)
|
|
{
|
|
if(!file_fd)
|
|
return -1;
|
|
|
|
if(CurPos >= (s32) DataSize)
|
|
return 0;
|
|
|
|
file_fd->seek(DataOffset+CurPos, SEEK_SET);
|
|
|
|
if(buffer_size > (s32) DataSize-CurPos)
|
|
buffer_size = DataSize-CurPos;
|
|
|
|
s32 read = file_fd->read(buffer, buffer_size);
|
|
if(read > 0)
|
|
{
|
|
if (Is16Bit)
|
|
{
|
|
read &= ~0x0001;
|
|
|
|
for (u32 i = 0; i < (u32) (read / sizeof (u16)); ++i)
|
|
((u16 *) buffer)[i] = le16(((u16 *) buffer)[i]);
|
|
}
|
|
CurPos += read;
|
|
}
|
|
|
|
return read;
|
|
}
|