ga_SampleSource* gau_sample_source_create_wav(ga_DataSource* in_dataSrc)
{
gc_result validHeader;
gau_SampleSourceWav* ret = gcX_ops->allocFunc(sizeof(gau_SampleSourceWav));
gau_SampleSourceWavContext* ctx = &ret->context;
gc_int32 seekable = ga_data_source_flags(in_dataSrc) & GA_FLAG_SEEKABLE ? 1 : 0;
ga_sample_source_init(&ret->sampleSrc);
ret->sampleSrc.flags = GA_FLAG_THREADSAFE;
if(seekable)
ret->sampleSrc.flags |= GA_FLAG_SEEKABLE;
ret->sampleSrc.readFunc = &gauX_sample_source_wav_read;
ret->sampleSrc.endFunc = &gauX_sample_source_wav_end;
if(seekable)
{
ret->sampleSrc.seekFunc = &gauX_sample_source_wav_seek;
ret->sampleSrc.tellFunc = &gauX_sample_source_wav_tell;
}
ret->sampleSrc.closeFunc = &gauX_sample_source_wav_close;
ctx->pos = 0;
ga_data_source_acquire(in_dataSrc);
ctx->dataSrc = in_dataSrc;
validHeader = gauX_sample_source_wav_load_header(in_dataSrc, &ctx->wavHeader);
if(validHeader == GC_SUCCESS)
{
ctx->posMutex = gc_mutex_create();
ret->sampleSrc.format.numChannels = ctx->wavHeader.channels;
ret->sampleSrc.format.bitsPerSample = ctx->wavHeader.bitsPerSample;
ret->sampleSrc.format.sampleRate = ctx->wavHeader.sampleRate;
ctx->sampleSize = ga_format_sampleSize(&ret->sampleSrc.format);
}
else
{
ga_data_source_release(in_dataSrc);
gcX_ops->freeFunc(ret);
ret = 0;
}
return (ga_SampleSource*)ret;
}
ga_SampleSource* gau_sample_source_create_ogg(ga_DataSource* in_dataSrc)
{
gau_SampleSourceOgg* ret = gcX_ops->allocFunc(sizeof(gau_SampleSourceOgg));
gau_SampleSourceOggContext* ctx = &ret->context;
gc_int32 endian = 0; /* 0 is little endian (aka x86), 1 is big endian */
gc_int32 bytesPerSample = 2;
gc_int32 isValidOgg = 0;
gc_int32 oggIsOpen;
ov_callbacks oggCallbacks;
gc_int32 seekable = ga_data_source_flags(in_dataSrc) & GA_FLAG_SEEKABLE ? 1 : 0;
ga_sample_source_init(&ret->sampleSrc);
ret->sampleSrc.flags = GA_FLAG_THREADSAFE;
if(seekable)
ret->sampleSrc.flags |= GA_FLAG_SEEKABLE;
ret->sampleSrc.readFunc = &gauX_sample_source_ogg_read;
ret->sampleSrc.endFunc = &gauX_sample_source_ogg_end;
if(seekable)
{
ret->sampleSrc.seekFunc = &gauX_sample_source_ogg_seek;
ret->sampleSrc.tellFunc = &gauX_sample_source_ogg_tell;
}
ret->sampleSrc.closeFunc = &gauX_sample_source_ogg_close;
ga_data_source_acquire(in_dataSrc);
ctx->dataSrc = in_dataSrc;
ctx->endOfSamples = 0;
/* OGG Setup */
oggCallbacks.read_func = &gauX_sample_source_ogg_callback_read;
if(seekable)
{
oggCallbacks.seek_func = &gauX_sample_source_ogg_callback_seek;
oggCallbacks.tell_func = &gauX_sample_source_ogg_callback_tell;
}
else
{
oggCallbacks.seek_func = 0;
oggCallbacks.tell_func = 0;
}
oggCallbacks.close_func = &gauX_sample_source_ogg_callback_close;
ctx->oggCallbackData.dataSrc = in_dataSrc;
oggIsOpen = ov_open_callbacks(&ctx->oggCallbackData, &ctx->oggFile, 0, 0, oggCallbacks);
if(oggIsOpen == 0) /* 0 means "open" */
{
ctx->oggInfo = ov_info(&ctx->oggFile, -1);
ov_pcm_seek(&ctx->oggFile, 0); /* Seek fixes some poorly-formatted OGGs. */
isValidOgg = ctx->oggInfo->channels <= 2;
if(isValidOgg)
{
ret->sampleSrc.format.bitsPerSample = bytesPerSample * 8;
ret->sampleSrc.format.numChannels = ctx->oggInfo->channels;
ret->sampleSrc.format.sampleRate = ctx->oggInfo->rate;
}
else
ov_clear(&ctx->oggFile);
}
if(isValidOgg)
ctx->oggMutex = gc_mutex_create();
else
{
ga_data_source_release(in_dataSrc);
gcX_ops->freeFunc(ret);
ret = 0;
}
return (ga_SampleSource*)ret;
}
