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#include "alutInternal.h"
struct BufferData_struct
{
ALvoid *data;
size_t length;
ALint numChannels;
ALint bitsPerSample;
ALfloat sampleFrequency;
};
BufferData *_alutBufferDataConstruct(ALvoid * data, size_t length, ALint numChannels, ALint bitsPerSample, ALfloat sampleFrequency)
{
BufferData *bufferData = (BufferData *) _alutMalloc(sizeof(BufferData));
if (bufferData == NULL)
{
return NULL;
}
bufferData->data = data;
bufferData->length = length;
bufferData->numChannels = numChannels;
bufferData->bitsPerSample = bitsPerSample;
bufferData->sampleFrequency = sampleFrequency;
return bufferData;
}
ALboolean _alutBufferDataDestroy(BufferData * bufferData)
{
if (bufferData->data != NULL)
{
free(bufferData->data);
}
free(bufferData);
return AL_TRUE;
}
ALvoid *_alutBufferDataGetData(const BufferData * bufferData)
{
return bufferData->data;
}
void _alutBufferDataDetachData(BufferData * bufferData)
{
bufferData->data = NULL;
}
size_t _alutBufferDataGetLength(const BufferData * bufferData)
{
return bufferData->length;
}
static ALint getNumChannels(const BufferData * bufferData)
{
return bufferData->numChannels;
}
static ALint getBitsPerSample(const BufferData * bufferData)
{
return bufferData->bitsPerSample;
}
ALfloat _alutBufferDataGetSampleFrequency(const BufferData * bufferData)
{
return bufferData->sampleFrequency;
}
/****************************************************************************
* The utility functions below do not know the internal BufferData
* representation.
****************************************************************************/
ALboolean _alutGetFormat(const BufferData * bufferData, ALenum * format)
{
if (!_alutFormatConstruct(getNumChannels(bufferData), getBitsPerSample(bufferData), format))
{
_alutSetError(ALUT_ERROR_UNSUPPORTED_FILE_SUBTYPE);
return AL_FALSE;
}
return AL_TRUE;
}
static ALuint generateBuffer(void)
{
ALuint buffer;
alGenBuffers(1, &buffer);
if (alGetError() != AL_NO_ERROR)
{
_alutSetError(ALUT_ERROR_GEN_BUFFERS);
return AL_NONE;
}
return buffer;
}
static ALboolean passBufferData(BufferData * bufferData, ALuint bid)
{
ALenum format;
size_t size;
ALfloat frequency;
if (!_alutGetFormat(bufferData, &format))
{
return AL_FALSE;
}
/* GCC is a bit picky about casting function calls, so we do it in two
* steps... */
size = _alutBufferDataGetLength(bufferData);
frequency = _alutBufferDataGetSampleFrequency(bufferData);
alBufferData(bid, format, _alutBufferDataGetData(bufferData), (ALsizei) size, (ALsizei) frequency);
if (alGetError() != AL_NO_ERROR)
{
_alutSetError(ALUT_ERROR_BUFFER_DATA);
return AL_FALSE;
}
return AL_TRUE;
}
ALuint _alutPassBufferData(BufferData * bufferData)
{
ALuint buffer = generateBuffer();
if (buffer == AL_NONE)
{
return AL_NONE;
}
if (!passBufferData(bufferData, buffer))
{
return AL_NONE;
}
return buffer;
}
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