usbloadergx/source/SoundOperations/OggDecoder.cpp

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/***************************************************************************
* 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 <unistd.h>
#include <malloc.h>
#include "OggDecoder.hpp"
extern "C" int ogg_read(void * punt, int bytes, int blocks, int *f)
{
return ((CFile *) f)->read((u8 *) punt, bytes*blocks);
}
extern "C" int ogg_seek(int *f, ogg_int64_t offset, int mode)
{
return ((CFile *) f)->seek((u64) offset, mode);
}
extern "C" int ogg_close(int *f)
{
((CFile *) f)->close();
return 0;
}
extern "C" long ogg_tell(int *f)
{
return (long) ((CFile *) f)->tell();
}
static ov_callbacks callbacks = {
(size_t (*)(void *, size_t, size_t, void *)) ogg_read,
(int (*)(void *, ogg_int64_t, int)) ogg_seek,
(int (*)(void *)) ogg_close,
(long (*)(void *)) ogg_tell
};
OggDecoder::OggDecoder(const char * filepath)
: SoundDecoder(filepath)
{
SoundType = SOUND_OGG;
if(!file_fd)
return;
OpenFile();
}
OggDecoder::OggDecoder(const u8 * snd, int len)
: SoundDecoder(snd, len)
{
SoundType = SOUND_OGG;
if(!file_fd)
return;
OpenFile();
}
OggDecoder::~OggDecoder()
{
ExitRequested = true;
while(Decoding)
usleep(100);
if(file_fd)
ov_clear(&ogg_file);
}
void OggDecoder::OpenFile()
{
if (ov_open_callbacks(file_fd, &ogg_file, NULL, 0, callbacks) < 0)
{
delete file_fd;
file_fd = NULL;
return;
}
ogg_info = ov_info(&ogg_file, -1);
Decode();
}
int OggDecoder::GetFormat()
{
if(!file_fd)
return VOICE_STEREO_16BIT;
return ((ogg_info->channels == 2) ? VOICE_STEREO_16BIT : VOICE_MONO_16BIT);
}
int OggDecoder::GetSampleRate()
{
if(!file_fd)
return 0;
return (int) ogg_info->rate;
}
int OggDecoder::Rewind()
{
if(!file_fd)
return -1;
int ret = ov_time_seek(&ogg_file, 0);
CurPos = 0;
EndOfFile = false;
return ret;
}
int OggDecoder::Read(u8 * buffer, int buffer_size, int pos)
{
if(!file_fd)
return -1;
int bitstream = 0;
int read = ov_read(&ogg_file, (char *) buffer, buffer_size, &bitstream);
if(read > 0)
CurPos += read;
return read;
}