FIOSAudioSoundBuffer* FIOSAudioSoundBuffer::CreateNativeBuffer(FIOSAudioDevice* IOSAudioDevice, USoundWave* InWave)
{
FWaveModInfo WaveInfo;
InWave->InitAudioResource(IOSAudioDevice->GetRuntimeFormat(InWave));
if (!InWave->ResourceData || InWave->ResourceSize <= 0 || !WaveInfo.ReadWaveInfo(InWave->ResourceData, InWave->ResourceSize))
{
InWave->RemoveAudioResource();
return NULL;
}
uint32 UncompressedBlockSize = 0;
uint32 CompressedBlockSize = 0;
const uint32 PreambleSize = 7;
const uint32 BlockSize = *WaveInfo.pBlockAlign;
switch (*WaveInfo.pFormatTag)
{
case SoundFormat_ADPCM:
// (BlockSize - PreambleSize) * 2 (samples per byte) + 2 (preamble samples)
UncompressedBlockSize = (2 + (BlockSize - PreambleSize) * 2) * sizeof(int16);
CompressedBlockSize = BlockSize;
if ((WaveInfo.SampleDataSize % CompressedBlockSize) != 0)
{
InWave->RemoveAudioResource();
return NULL;
}
break;
case SoundFormat_LPCM:
break;
}
// Create new buffer
FIOSAudioSoundBuffer* Buffer = new FIOSAudioSoundBuffer(IOSAudioDevice, static_cast<ESoundFormat>(*WaveInfo.pFormatTag));
Buffer->NumChannels = InWave->NumChannels;
Buffer->SampleRate = InWave->SampleRate;
Buffer->UncompressedBlockSize = UncompressedBlockSize;
Buffer->CompressedBlockSize = CompressedBlockSize;
Buffer->BufferSize = WaveInfo.SampleDataSize;
Buffer->SampleData = static_cast<int16*>(FMemory::Malloc(Buffer->BufferSize));
FMemory::Memcpy(Buffer->SampleData, WaveInfo.SampleDataStart, Buffer->BufferSize);
FAudioDeviceManager* AudioDeviceManager = GEngine->GetAudioDeviceManager();
check(AudioDeviceManager != nullptr);
AudioDeviceManager->TrackResource(InWave, Buffer);
InWave->RemoveAudioResource();
return Buffer;
}
FALSoundBuffer* FALSoundBuffer::CreateNativeBuffer( FALAudioDevice* AudioDevice, USoundWave* Wave)
{
SCOPE_CYCLE_COUNTER( STAT_AudioResourceCreationTime );
// This code is not relevant for now on HTML5 but adding this for consistency with other platforms.
// Check to see if thread has finished decompressing on the other thread
if (Wave->AudioDecompressor != NULL)
{
Wave->AudioDecompressor->EnsureCompletion();
// Remove the decompressor
delete Wave->AudioDecompressor;
Wave->AudioDecompressor = NULL;
}
// Can't create a buffer without any source data
if( Wave == NULL || Wave->NumChannels == 0 )
{
return( NULL );
}
FWaveModInfo WaveInfo;
Wave->InitAudioResource(AudioDevice->GetRuntimeFormat(Wave));
FALSoundBuffer* Buffer = NULL;
// Find the existing buffer if any
if( Wave->ResourceID )
{
Buffer = static_cast<FALSoundBuffer*>(AudioDevice->WaveBufferMap.FindRef( Wave->ResourceID ));
}
if( Buffer == NULL )
{
// Create new buffer.
Buffer = new FALSoundBuffer( AudioDevice );
alGenBuffers( 1, Buffer->BufferIds );
AudioDevice->alError( TEXT( "RegisterSound" ) );
AudioDevice->TrackResource(Wave, Buffer);
Buffer->InternalFormat = AudioDevice->GetInternalFormat( Wave->NumChannels );
Buffer->NumChannels = Wave->NumChannels;
Buffer->SampleRate = Wave->SampleRate;
if (Wave->RawPCMData)
{
// upload it
Buffer->BufferSize = Wave->RawPCMDataSize;
alBufferData( Buffer->BufferIds[0], Buffer->InternalFormat, Wave->RawPCMData, Wave->RawPCMDataSize, Buffer->SampleRate );
// Free up the data if necessary
if( Wave->bDynamicResource )
{
FMemory::Free( Wave->RawPCMData );
Wave->RawPCMData = NULL;
Wave->bDynamicResource = false;
}
}
else
{
// get the raw data
uint8* SoundData = ( uint8* )Wave->RawData.Lock( LOCK_READ_ONLY );
// it's (possibly) a pointer to a wave file, so skip over the header
int SoundDataSize = Wave->RawData.GetBulkDataSize();
// is there a wave header?
FWaveModInfo WaveInfo;
if (WaveInfo.ReadWaveInfo(SoundData, SoundDataSize))
{
// if so, modify the location and size of the sound data based on header
SoundData = WaveInfo.SampleDataStart;
SoundDataSize = WaveInfo.SampleDataSize;
}
// let the Buffer know the final size
Buffer->BufferSize = SoundDataSize;
// upload it
alBufferData( Buffer->BufferIds[0], Buffer->InternalFormat, SoundData, Buffer->BufferSize, Buffer->SampleRate );
// unload it
Wave->RawData.Unlock();
}
if( AudioDevice->alError( TEXT( "RegisterSound (buffer data)" ) ) || ( Buffer->BufferSize == 0 ) )
{
Buffer->InternalFormat = 0;
}
if( Buffer->InternalFormat == 0 )
{
UE_LOG ( LogAudio, Log,TEXT( "Audio: sound format not supported for '%s' (%d)" ), *Wave->GetName(), Wave->NumChannels );
delete Buffer;
Buffer = NULL;
}
}
return Buffer;
}