mirror of
https://github.com/Maschell/libgui.git
synced 2024-11-27 07:04:19 +01:00
155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
/***************************************************************************
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* Copyright (C) 2010
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* by Dimok
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any
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* damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any
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* purpose, including commercial applications, and to alter it and
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* redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you
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* must not claim that you wrote the original software. If you use
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* this software in a product, an acknowledgment in the product
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* documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and
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* must not be misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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* for WiiXplorer 2010
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***************************************************************************/
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#include <string.h>
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#include "WavDecoder.hpp"
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#include "utils/utils.h"
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WavDecoder::WavDecoder(const char * filepath)
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: SoundDecoder(filepath)
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{
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SoundType = SOUND_WAV;
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SampleRate = 48000;
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Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
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if(!file_fd)
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return;
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OpenFile();
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}
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WavDecoder::WavDecoder(const u8 * snd, s32 len)
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: SoundDecoder(snd, len)
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{
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SoundType = SOUND_WAV;
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SampleRate = 48000;
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Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
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if(!file_fd)
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return;
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OpenFile();
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}
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WavDecoder::~WavDecoder()
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{
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}
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void WavDecoder::OpenFile()
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{
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SWaveHdr Header;
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SWaveFmtChunk FmtChunk;
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memset(&Header, 0, sizeof(SWaveHdr));
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memset(&FmtChunk, 0, sizeof(SWaveFmtChunk));
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file_fd->read((u8 *) &Header, sizeof(SWaveHdr));
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file_fd->read((u8 *) &FmtChunk, sizeof(SWaveFmtChunk));
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if (Header.magicRIFF != 0x52494646) // 'RIFF'
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{
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CloseFile();
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return;
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}
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else if(Header.magicWAVE != 0x57415645) // 'WAVE'
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{
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CloseFile();
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return;
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}
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else if(FmtChunk.magicFMT != 0x666d7420) // 'fmt '
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{
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CloseFile();
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return;
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}
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DataOffset = sizeof(SWaveHdr)+le32(FmtChunk.size)+8;
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file_fd->seek(DataOffset, SEEK_SET);
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SWaveChunk DataChunk;
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file_fd->read((u8 *) &DataChunk, sizeof(SWaveChunk));
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while(DataChunk.magicDATA != 0x64617461) // 'data'
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{
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DataOffset += 8+le32(DataChunk.size);
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file_fd->seek(DataOffset, SEEK_SET);
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s32 ret = file_fd->read((u8 *) &DataChunk, sizeof(SWaveChunk));
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if(ret <= 0)
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{
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CloseFile();
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return;
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}
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}
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DataOffset += 8;
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DataSize = le32(DataChunk.size);
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Is16Bit = (le16(FmtChunk.bps) == 16);
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SampleRate = le32(FmtChunk.freq);
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if (le16(FmtChunk.channels) == 1 && le16(FmtChunk.bps) == 8 && le16(FmtChunk.alignment) <= 1)
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Format = CHANNELS_MONO | FORMAT_PCM_8_BIT;
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else if (le16(FmtChunk.channels) == 1 && le16(FmtChunk.bps) == 16 && le16(FmtChunk.alignment) <= 2)
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Format = CHANNELS_MONO | FORMAT_PCM_16_BIT;
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else if (le16(FmtChunk.channels) == 2 && le16(FmtChunk.bps) == 8 && le16(FmtChunk.alignment) <= 2)
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Format = CHANNELS_STEREO | FORMAT_PCM_8_BIT;
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else if (le16(FmtChunk.channels) == 2 && le16(FmtChunk.bps) == 16 && le16(FmtChunk.alignment) <= 4)
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Format = CHANNELS_STEREO | FORMAT_PCM_16_BIT;
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}
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void WavDecoder::CloseFile()
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{
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if(file_fd)
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delete file_fd;
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file_fd = NULL;
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}
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s32 WavDecoder::Read(u8 * buffer, s32 buffer_size, s32 pos)
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{
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if(!file_fd)
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return -1;
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if(CurPos >= (s32) DataSize)
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return 0;
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file_fd->seek(DataOffset+CurPos, SEEK_SET);
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if(buffer_size > (s32) DataSize-CurPos)
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buffer_size = DataSize-CurPos;
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s32 read = file_fd->read(buffer, buffer_size);
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if(read > 0)
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{
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if (Is16Bit)
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{
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read &= ~0x0001;
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for (u32 i = 0; i < (u32) (read / sizeof (u16)); ++i)
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((u16 *) buffer)[i] = le16(((u16 *) buffer)[i]);
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}
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CurPos += read;
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}
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return read;
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}
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