public unsafe bool WriteOutput(MpegConverterSettings settings)
{
AudioFileDataHeader audioFileDataHeader = new AudioFileDataHeader
{
CompressionType = AudioFileDataCompressionType.EALayer3_EL31,
Channels = settings.NumberOfChannels == 1 ? AudioFileDataChannels.Mono : AudioFileDataChannels.Stereo,
SampleRate = (short)settings.SampleRate
};
Endian.ByteSwapInt16((ushort *)&audioFileDataHeader.SampleRate);
MpegFrameHeader frameHeader;
while ((frameHeader = ReadFrameHeader()) != null)
{
BitStreamWriter writer = new BitStreamWriter();
writer.Write(0, 8);
writer.Write((byte)frameHeader.Version, 2);
writer.Write(frameHeader.SampleRateIndex, 2);
writer.Write((byte)frameHeader.ChannelMode, 2);
writer.Write(frameHeader.ModeExtension, 2);
// writer.Write(); // TODO: is granule index == 1
// if granule index == 1 && version == mv_1
// for channels -> 4 bits scfsi
// for channels -> channel info 12 + 32 + x bits
// add up data size
// data size += 8 - size % 8
// data size /= 8
// if data size > 0
// copy data
}
return(true);
}
public unsafe bool WriteOutput(BlockInfo info, MpegConverterSettings settings)
{
AudioFileDataHeader audioFileDataHeader = new AudioFileDataHeader
{
CompressionType = AudioFileDataCompressionType.EALayer3_EL31,
Channels = settings.NumberOfChannels == 1 ? AudioFileDataChannels.Mono : AudioFileDataChannels.Stereo,
SampleRate = (short)settings.SampleRate,
NumberOfSamples = info.NumberOfSamples,
Size = info.Size
};
Endian.ByteSwapInt16((ushort *)&audioFileDataHeader.SampleRate);
Endian.ByteSwapInt32((uint *)&audioFileDataHeader.NumberOfSamples);
Endian.ByteSwapInt32((uint *)&audioFileDataHeader.Size);
if (settings.IsStreamed)
{
byte[] buffer = new byte[2];
_outputSnr.Write(buffer, 0, buffer.Length);
}
else
{
byte[] buffer = new byte[sizeof(AudioFileDataHeader)];
fixed(byte *pBuffer = &buffer[0])
{
MarshalUtil.CopyMemory((IntPtr)pBuffer, (IntPtr)(byte *)&audioFileDataHeader, sizeof(AudioFileDataHeader));
}
_outputSnr.Write(buffer, 0, buffer.Length);
}
MpegFrameHeader frameHeader;
while ((frameHeader = ReadFrameHeader()) != null)
{
BitStreamWriter writer = new BitStreamWriter();
writer.Write(0, 8);
writer.Write((byte)frameHeader.Version, 2);
writer.Write(frameHeader.SampleRateIndex, 2);
writer.Write((byte)frameHeader.ChannelMode, 2);
writer.Write(frameHeader.ModeExtension, 2);
// read frame data
writer.Write(); // TODO: is granule index == 1
// if granule index == 1 && version == mv_1
// for channels -> 4 bits scfsi
// for channels -> channel info 12 + 32 + x bits
// add up data size
// data size += 8 - size % 8
// data size /= 8
// if data size > 0
// copy data
}
return(true);
}
public MpegConverterSettings GetSettings()
{
MpegConverterSettings result = new MpegConverterSettings();
// at the moment we ignore everything but IsStreamed & channels anyway, we assume channels are same for every mp3 header
byte[] header = new byte[10];
long frameStart = _input.Position;
_input.Read(header, 0, 10);
_input.Seek(frameStart, SeekOrigin.Begin);
if (header[0] == 'I' && header[1] == 'D' && header[2] == '3')
{
SkipID3Tag(header);
}
while (header[0] != 0xFF)
{
frameStart = _input.Position;
int value = _input.ReadByte();
if (value == -1)
{
throw new BinaryAssetBuilderException(ErrorCode.InvalidArgument, "Could not find MP3 frame header.");
}
header[0] = (byte)value;
}
_input.Read(header, 1, 9);
_input.Seek(frameStart, SeekOrigin.Begin);
MpegFrameHeader frameHeader = new MpegFrameHeader();
if (!ParseMpegFrameHeader(frameHeader, header))
{
throw new BinaryAssetBuilderException(ErrorCode.InvalidArgument, "Could not parse MP3 frame header.");
}
result.NumberOfChannels = frameHeader.NumberOfChannels;
result.SampleRate = frameHeader.SampleRate;
return(result);
}
private unsafe bool EncodeEALayer3(InstanceDeclaration declaration, AudioFile audioFile, out AssetBuffer result)
{
if (_platform != TargetPlatform.Win32)
{
throw new InvalidOperationException("Critical: EALayer3 audio compiler should not be called on non Win32 platforms.");
}
if (audioFile.PCCompression != PCAudioCompressionSetting.EALAYER3)
{
throw new InvalidOperationException("Critical: EALayer3 audio compiler should not be called on non EALayer3 compression.");
}
AudioFileRuntime *audioFileRuntime;
Tracker tracker = new Tracker(&audioFileRuntime, _platform == TargetPlatform.Xbox360);
string filePath = audioFile.File;
if (!filePath.EndsWith(".mp3"))
{
throw new InvalidOperationException("Critical: EALayer3 audio compiler should not be called on non MP3 files.");
}
bool isPathEndingWithSound = Path.GetDirectoryName(filePath).ToLower().EndsWith("\\sounds"); // flag2
bool?isStreamedBox = audioFile.IsStreamedOnPC; // flagPtr
int? sampleRateBox = audioFile.PCSampleRate; // numPtr1
int quality = audioFile.PCQuality; // num3
// compressionType, 1 == none, 29 == xas, 28 == xma (xbox, will actually set to none or same as xas depending on the isPathEndingWithSound flag)
MpegConverterCompressionType compression; // num4
switch (audioFile.PCCompression)
{
case PCAudioCompressionSetting.NONE:
compression = !isPathEndingWithSound ? MpegConverterCompressionType.None : MpegConverterCompressionType.XAS;
break;
case PCAudioCompressionSetting.XAS:
compression = MpegConverterCompressionType.XAS;
break;
case PCAudioCompressionSetting.EALAYER3:
compression = MpegConverterCompressionType.EALayer3;
break;
default:
throw new BinaryAssetBuilderException(ErrorCode.InternalError, "Internal error: xml compiler returned bad PC audio compression type of {0}.", audioFile.PCCompression);
}
bool isStreamed = isStreamedBox ?? !isPathEndingWithSound; // flag1
if (audioFile.SubtitleStringName != null)
{
Relo.Marshaler.Marshal(audioFile.SubtitleStringName, &audioFileRuntime->SubtitleStringName, tracker);
}
else
{
Relo.Marshaler.Marshal($"DIALOGEVENT:{Path.GetFileNameWithoutExtension(filePath)}SubTitle", &audioFileRuntime->SubtitleStringName, tracker);
}
audioFileRuntime->NumberOfChannels = 0;
audioFileRuntime->NumberOfSamples = 0;
audioFileRuntime->SampleRate = 0;
audioFileRuntime->HeaderData = IntPtr.Zero;
audioFileRuntime->HeaderDataSize = 0;
// identify format (SIMEX_id(streamPtr)) - we don't need that, though we might want to check for mp3
// check format needs to be 0 or 1 aka WAVE or AIFF - we don't need that, though we might want to check for mp3
// open audio file (SIMEX_open(streamPtr, &instancePtr, format)
using (MpegConverter converter = new MpegConverter(filePath))
{
string tempFile = declaration.CustomDataPath + _tempFilenameSuffix; // str2
_tracer.TraceNote("Creating temp file {0}", tempFile);
using (AutoCleanUpTempFiles cleanUpTempFiles = new AutoCleanUpTempFiles(tempFile))
{
// set temp filename SIMEX_setfilename(str2ptr)
converter.SetOutputFilePath(tempFile);
// create temp output file SIMEX_create(null, &instancePtr, 39)
try
{
converter.CreateOutputFiles();
MpegConverterSettings converterSettings = converter.GetSettings();
// start iterating through elements (num elements is returned by SIMEX_open)
// get info SIMEX_info(instancePtr, &infoPtr, idx)
// read element SIMEX_read(instancePtr, infoPtr, idx)
if (isStreamed)
{
// infoPtr + 526 = 0x1000;
converterSettings.IsStreamed = true;
_tracer.TraceNote("Setting play location to streamed.");
}
else
{
// infoPtr + 526 = 0x0800;
converterSettings.IsStreamed = false;
_tracer.TraceNote("Setting play location to RAM.");
}
// infoPtr + 509 = compression;
converterSettings.CompressionType = compression;
_tracer.TraceNote("Setting compression type to {0}.", compression); // SIMEX_getsamplerepname(compression)
if (compression == MpegConverterCompressionType.XMA || compression == MpegConverterCompressionType.EALayer3)
{
if (quality < 0 || quality > 100)
{
throw new BinaryAssetBuilderException(ErrorCode.InvalidArgument, "Audio file {0}: Quality parameter must be between 0 and 100.", declaration);
}
// infoPtr + 536 = quality
converterSettings.CompressionQuality = quality;
_tracer.TraceNote("Setting compression quality to {0}.", quality);
}
// if (sampleRateBox.HasValue && sampleRateBox.Value != *(int*)(*(infoPtr + 540))
if (sampleRateBox.HasValue && sampleRateBox.Value != converterSettings.SampleRate)
{
int sampleRate = sampleRateBox.Value;
if (sampleRate < 400 || sampleRate > 96000)
{
throw new BinaryAssetBuilderException(ErrorCode.InvalidArgument, "Audio file {0}: Sample rate must be between 400 and 96000.", declaration);
}
_tracer.TraceNote("Resampling from {0} to {1}", converterSettings.SampleRate, sampleRate); // infoPtr + 540
// TODO: resampling
_tracer.TraceWarning("Warning: Resampling is currently not implemented.");
}
// if (*(int*)infoPtr != 0)
audioFileRuntime->NumberOfChannels = (byte)converterSettings.NumberOfChannels; // infoPtr + 510
audioFileRuntime->NumberOfSamples = converterSettings.NumberOfSamples; // infoPtr + 544
audioFileRuntime->SampleRate = converterSettings.SampleRate; // infoPtr + 540
if (audioFileRuntime->NumberOfChannels != 1 && audioFileRuntime->NumberOfChannels != 2 && audioFileRuntime->NumberOfChannels != 4 && audioFileRuntime->NumberOfChannels != 6)
{
_tracer.TraceWarning("Warning: Audio file {0} has {1} channels. The only supported channel counts are 1, 2, 4, and 6; sample will probably use only the first channel in the engine.", declaration, audioFileRuntime->NumberOfChannels);
}
// TODO if (!SIMEX_write(tmpFile, infoPtr, idx))
if (converter.WriteOutput(converterSettings))
{
throw new BinaryAssetBuilderException(ErrorCode.InternalError, "Internal error writing element of \"{0}\".", tempFile);
}
}
finally
{
converter.CloseOutputFiles();
}
string tempFileSnr = tempFile + ".snr";
if (isStreamed)
{
string tempFileSns = tempFile + ".sns";
if (File.Exists(declaration.CustomDataPath))
{
File.Delete(declaration.CustomDataPath);
}
_tracer.TraceNote("Creating output file {0}\n", declaration.CustomDataPath);
File.Move(tempFileSns, declaration.CustomDataPath);
using (Stream headerStream = new FileStream(tempFileSnr, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
{
int length = (int)headerStream.Length;
sbyte **headerData = (sbyte **)audioFileRuntime->HeaderData;
tracker.Push((void **)headerData, 1, length);
headerStream.Read((IntPtr)(*(int *)audioFileRuntime->HeaderData), length);
audioFileRuntime->HeaderDataSize = length;
tracker.Pop();
}
}
else
{
if (File.Exists(declaration.CustomDataPath))
{
File.Delete(declaration.CustomDataPath);
}
_tracer.TraceNote("Creating output file {0}\n", declaration.CustomDataPath);
File.Move(tempFileSnr, declaration.CustomDataPath);
}
if (tracker.IsBigEndian)
{
Tracker.ByteSwap32((uint *)&audioFileRuntime->NumberOfSamples);
Tracker.ByteSwap32((uint *)&audioFileRuntime->SampleRate);
Tracker.ByteSwap32((uint *)&audioFileRuntime->HeaderDataSize);
}
result = new AssetBuffer();
FinalizeTracker(tracker, result);
}
}
return(true);
}