示例#1
0
/**
 * Computes the derived data key suffix for a SoundWave's Streamed Audio.
 * @param SoundWave - The SoundWave for which to compute the derived data key.
 * @param AudioFormatName - The audio format we're creating the key for
 * @param OutKeySuffix - The derived data key suffix.
 */
static void GetStreamedAudioDerivedDataKeySuffix(
	const USoundWave& SoundWave,
	FName AudioFormatName,
	FString& OutKeySuffix
	)
{
	uint16 Version = 0;

	// get the version for this soundwave's platform format
	ITargetPlatformManagerModule* TPM = GetTargetPlatformManager();
	if (TPM)
	{
		const IAudioFormat* AudioFormat = TPM->FindAudioFormat(AudioFormatName);
		if (AudioFormat)
		{
			Version = AudioFormat->GetVersion(AudioFormatName);
		}
	}
	
	// build the key
	OutKeySuffix = FString::Printf(TEXT("%s_%d_%s"),
		*AudioFormatName.ToString(),
		Version,
		*SoundWave.CompressedDataGuid.ToString()
		);
}
示例#2
0
FDerivedAudioDataCompressor::FDerivedAudioDataCompressor(USoundWave* InSoundNode, FName InFormat)
	: SoundNode(InSoundNode)
	, Format(InFormat)
	, Compressor(NULL)
{
	ITargetPlatformManagerModule* TPM = GetTargetPlatformManager();
	if (TPM)
	{
		Compressor = TPM->FindAudioFormat(InFormat);
	}
}
示例#3
0
	/** Build the streamed audio. This function is safe to call from any thread. */
	void BuildStreamedAudio()
	{
		GetStreamedAudioDerivedDataKeySuffix(SoundWave, AudioFormatName, KeySuffix);

		DerivedData->Chunks.Empty();
		
		ITargetPlatformManagerModule* TPM = GetTargetPlatformManager();
		const IAudioFormat* AudioFormat = NULL;
		if (TPM)
		{
			AudioFormat = TPM->FindAudioFormat(AudioFormatName);
		}

		if (AudioFormat)
		{
			DerivedData->AudioFormat = AudioFormatName;

			FByteBulkData* CompressedData = SoundWave.GetCompressedData(AudioFormatName);
			TArray<uint8> CompressedBuffer;
			CompressedBuffer.Empty(CompressedData->GetBulkDataSize());
			CompressedBuffer.AddUninitialized(CompressedData->GetBulkDataSize());
			void* BufferData = CompressedBuffer.GetData();
			CompressedData->GetCopy(&BufferData, false);
			TArray<TArray<uint8>> ChunkBuffers;

			if (AudioFormat->SplitDataForStreaming(CompressedBuffer, ChunkBuffers))
			{
				for (int32 ChunkIndex = 0; ChunkIndex < ChunkBuffers.Num(); ++ChunkIndex)
				{
					FStreamedAudioChunk* NewChunk = new(DerivedData->Chunks) FStreamedAudioChunk();
					NewChunk->DataSize = ChunkBuffers[ChunkIndex].Num();
					NewChunk->BulkData.Lock(LOCK_READ_WRITE);
					void* NewChunkData = NewChunk->BulkData.Realloc(ChunkBuffers[ChunkIndex].Num());
					FMemory::Memcpy(NewChunkData, ChunkBuffers[ChunkIndex].GetData(), ChunkBuffers[ChunkIndex].Num());
					NewChunk->BulkData.Unlock();
				}
			}
			else
			{
				// Could not split so copy compressed data into a single chunk
				FStreamedAudioChunk* NewChunk = new(DerivedData->Chunks) FStreamedAudioChunk();
				NewChunk->DataSize = CompressedBuffer.Num();
				NewChunk->BulkData.Lock(LOCK_READ_WRITE);
				void* NewChunkData = NewChunk->BulkData.Realloc(CompressedBuffer.Num());
				FMemory::Memcpy(NewChunkData, CompressedBuffer.GetData(), CompressedBuffer.Num());
				NewChunk->BulkData.Unlock();
			}

			DerivedData->NumChunks = DerivedData->Chunks.Num();

			// Store it in the cache.
			PutDerivedDataInCache(DerivedData, KeySuffix);
		}
		
		if (DerivedData->Chunks.Num())
		{
			bool bInlineChunks = (CacheFlags & EStreamedAudioCacheFlags::InlineChunks) != 0;
			bSucceeded = !bInlineChunks || DerivedData->TryInlineChunkData();
		}
		else
		{
			UE_LOG(LogAudio, Warning, TEXT("Failed to build %s derived data for %s"),
				*AudioFormatName.GetPlainNameString(),
				*SoundWave.GetPathName()
				);
		}
	}