public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
_stream = stream;
InitializeReplayGainFilter(info, metadata, settings);
// Call the external ID3 encoder, if available
var metadataEncoderFactory =
ExtensionProvider.GetFactories <IAudioMetadataEncoder>("Extension", FileExtension).FirstOrDefault();
if (metadataEncoderFactory != null)
{
using (var export = metadataEncoderFactory.CreateExport())
using (var tempStream = new MemoryStream())
{
// Buffer the tag in memory
export.Value.WriteMetadata(tempStream, metadata, settings);
// Pre-allocate the whole stream (estimate worst case of 320kbps, plus the tag)
stream.SetLength(0xA000 * (long)info.PlayLength.TotalSeconds + tempStream.Length);
// Flush the tag to the output stream
tempStream.WriteTo(stream);
}
}
_encoder = new(stream);
_encoder.SetChannels(info.Channels);
_encoder.SetSampleRate(info.SampleRate);
if (info.FrameCount > 0)
{
_encoder.SetSampleCount((uint)info.FrameCount);
}
if (settings.TryGetValue("BitRate", out int bitRate))
{
// Use ABR, unless ForceCBR is set to true
if (settings.TryGetValue("ForceCBR", out bool forceCbr) && forceCbr)
{
_encoder.SetBitRate(bitRate);
}
else
{
_encoder.SetVbrMeanBitRate(bitRate);
_encoder.SetVbrMode(VbrMode.Abr);
}
}
else
{
// Use VBR quality 3 if nothing else is specified
_encoder.SetVbrQuality(
settings.TryGetValue("VBRQuality", out int vbrQuality)
? vbrQuality
: 3);
_encoder.SetVbrMode(VbrMode.Mtrh);
}
_encoder.InitializeParameters();
}
public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
InitializeReplayGainFilter(info, metadata, settings);
_oggStream = new OggStream(settings.TryGetValue("SerialNumber", out int serialNumber)
? serialNumber
: new Random().Next());
// Default to a quality setting of 5
if (settings.TryGetValue("BitRate", out int bitRate))
{
if (settings.TryGetValue("ForceCBR", out bool cbr) && cbr)
{
_encoder = new VorbisEncoder(info.Channels, info.SampleRate,
bitRate * 1000, bitRate * 1000, bitRate * 1000);
}
else
{
_encoder = new VorbisEncoder(info.Channels, info.SampleRate,
-1, bitRate * 1000, -1);
}
}
else
{
_encoder = new VorbisEncoder(info.Channels, info.SampleRate,
settings.TryGetValue("Quality", out int quality)
? quality / 10f
: 0.5f);
}
// Generate the header
using (var comment = new MetadataToVorbisCommentAdapter(metadata))
{
comment.HeaderOut(_encoder.DspState, out var first, out var second, out var third);
_oggStream.PacketIn(first);
_oggStream.PacketIn(second);
_oggStream.PacketIn(third);
}
// Buffer the header in memory
using (var tempStream = new MemoryStream())
{
_outputStream = tempStream;
// ReSharper disable once PossibleNullReferenceException
while (_oggStream.Flush(out var page))
{
WritePage(page);
}
// Pre-allocate the whole stream (estimate worst case of 500kbps, plus the header)
stream.SetLength(0xFA00 * (long)info.PlayLength.TotalSeconds + tempStream.Length);
// Flush the headers to the output stream
tempStream.WriteTo(stream);
}
_outputStream = stream;
}
public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
_stream = stream;
_metadata = metadata;
_settings = settings;
InitializeReplayGainFilter(info, metadata, settings);
var inputDescription = GetInputDescription(info);
_audioFile = new(GetOutputDescription(inputDescription), AudioFileType.M4A, stream);
_audioFile.SetProperty(ExtendedAudioFilePropertyId.ClientDataFormat, inputDescription);
var converter = _audioFile.GetProperty <IntPtr>(ExtendedAudioFilePropertyId.AudioConverter);
var logger = LoggerManager.LoggerFactory.CreateLogger <AacAudioEncoder>();
// Enable high quality (defaults to medium, 0x40)
SetConverterProperty(converter, AudioConverterPropertyId.CodecQuality, 0x60);
if (settings.TryGetValue("BitRate", out int bitRate))
{
switch (bitRate)
{
case > 256 when info.Channels == 1:
logger.LogWarning("The maximum bitrate for 1-channel audio is 256 kbps.");
bitRate = 256;
break;
case < 64 when info.Channels == 2:
logger.LogWarning("The minimum bitrate for 2-channel audio is 64 kbps.");
bitRate = 64;
break;
}
SetConverterProperty(converter, AudioConverterPropertyId.BitRate, bitRate * 1000);
// Set the control mode (constrained is the default)
var controlMode = BitrateControlMode.VariableConstrained;
if (settings.TryGetValue("ControlMode", out string?controlModeValue))
{
if (controlModeValue !.Equals("Average", StringComparison.OrdinalIgnoreCase))
{
controlMode = BitrateControlMode.LongTermAverage;
}
else if (controlModeValue.Equals("Constant", StringComparison.OrdinalIgnoreCase))
{
controlMode = BitrateControlMode.Constant;
}
}
SetConverterProperty(converter, AudioConverterPropertyId.BitRateControlMode, (uint)controlMode);
}
public void Initialize(AudioInfo info, SettingDictionary settings, GroupToken groupToken)
{
_analyzer = new R128Analyzer((uint)info.Channels, (uint)info.SampleRate,
settings.TryGetValue("PeakAnalysis", out string peakAnalysis) &&
peakAnalysis.Equals("Interpolated", StringComparison.Ordinal));
_groupState = (GroupState)groupToken.GetOrSetGroupState(new GroupState());
// ReSharper disable once PossibleNullReferenceException
_groupState.Handles.Enqueue(_analyzer.Handle);
}
public void Initialize(AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
if (settings.TryGetValue("ApplyGain", out string applyGain))
{
_scale = applyGain.Equals("Track", StringComparison.OrdinalIgnoreCase)
? CalculateScale(metadata.TrackGain, metadata.TrackPeak)
: CalculateScale(metadata.AlbumGain, metadata.AlbumPeak);
}
// Adjust the metadata so that it remains valid
metadata.TrackPeak = CalculatePeak(metadata.TrackPeak, _scale);
metadata.AlbumPeak = CalculatePeak(metadata.AlbumPeak, _scale);
metadata.TrackGain = CalculateGain(metadata.TrackGain, _scale);
metadata.AlbumGain = CalculateGain(metadata.AlbumGain, _scale);
}
public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
InitializeReplayGainFilter(info, metadata, settings);
if (!settings.TryGetValue("SerialNumber", out int serialNumber))
#if NETSTANDARD2_0
{ using (var random = RandomNumberGenerator.Create())
{
var buffer = new byte[sizeof(int)];
random.GetNonZeroBytes(buffer);
serialNumber = BitConverter.ToInt32(buffer, 0);
} }
#else
{ serialNumber = RandomNumberGenerator.GetInt32(int.MaxValue); }
#endif
_oggStream = new(serialNumber);
// Default to a quality setting of 5
if (settings.TryGetValue("BitRate", out int bitRate))
{
if (settings.TryGetValue("ForceCBR", out bool cbr) && cbr)
{
_encoder = new(info.Channels, info.SampleRate, bitRate * 1000, bitRate * 1000, bitRate * 1000);
}
else
{
_encoder = new(info.Channels, info.SampleRate, -1, bitRate * 1000, -1);
}
}
else
{
_encoder = new(info.Channels, info.SampleRate,
settings.TryGetValue("Quality", out int quality) ? quality / 10f : 0.5f);
}
// Generate the header
using (var comment = new MetadataToVorbisCommentAdapter(metadata))
{
comment.HeaderOut(_encoder.DspState, out var first, out var second, out var third);
_oggStream.PacketIn(first);
_oggStream.PacketIn(second);
_oggStream.PacketIn(third);
}
// Buffer the header in memory
using (var tempStream = new MemoryStream())
{
_outputStream = tempStream;
while (_oggStream.Flush(out var page))
{
WritePage(page);
}
// Pre-allocate the whole stream (estimate worst case of 500kbps, plus the header)
stream.SetLength(0xFA00 * (long)info.PlayLength.TotalSeconds + tempStream.Length);
// Flush the headers to the output stream
tempStream.WriteTo(stream);
}
_outputStream = stream;
}
public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
var gain = 0;
if (settings.TryGetValue("ApplyGain", out string applyGain))
{
var scale = applyGain.Equals("Track", StringComparison.OrdinalIgnoreCase)
? CalculateScale(metadata.TrackGain, metadata.TrackPeak)
: CalculateScale(metadata.AlbumGain, metadata.AlbumPeak);
// Adjust the metadata so that it remains valid
metadata.TrackGain = CalculateGain(metadata.TrackGain, scale);
metadata.AlbumGain = CalculateGain(metadata.AlbumGain, scale);
gain = (int)Math.Round(Math.Log10(scale) * 5120);
}
_comments = new MetadataToOpusCommentAdapter(metadata);
_encoder = new Encoder(stream, info.SampleRate, info.Channels, (int)info.PlayLength.TotalSeconds,
_comments.Handle);
if (info.BitsPerSample > 0)
{
_encoder.SetLsbDepth(Math.Min(Math.Max(info.BitsPerSample, 8), 24));
}
_encoder.SetHeaderGain(gain);
if (!settings.TryGetValue("SerialNumber", out int serialNumber))
{
serialNumber = new Random().Next();
}
_encoder.SetSerialNumber(serialNumber);
// Default to full VBR
if (settings.TryGetValue("ControlMode", out string vbrMode))
{
switch (vbrMode)
{
case "Variable":
_encoder.SetVbrConstraint(false);
break;
// 'Constrained' is the libopusenc default
case "Constant":
_encoder.SetVbr(false);
break;
}
}
else
{
_encoder.SetVbrConstraint(false);
}
if (settings.TryGetValue("BitRate", out int bitRate))
{
_encoder.SetBitRate(bitRate);
}
if (settings.TryGetValue("SignalType", out string signalType))
{
_encoder.SetSignal(signalType.Equals("Speech", StringComparison.OrdinalIgnoreCase)
? SignalType.Speech
: SignalType.Music);
}
else
{
_encoder.SetSignal(SignalType.Music);
}
}
public void Initialize(Stream stream, AudioInfo info, AudioMetadata metadata, SettingDictionary settings)
{
_stream = stream;
_metadata = metadata;
_settings = settings;
InitializeReplayGainFilter(info, metadata, settings);
var inputDescription = GetInputDescription(info);
_audioFile = new ExtendedAudioFile(GetOutputDescription(inputDescription), AudioFileType.M4A, stream);
_audioFile.SetProperty(ExtendedAudioFilePropertyId.ClientDataFormat, inputDescription);
var converter = _audioFile.GetProperty <IntPtr>(ExtendedAudioFilePropertyId.AudioConverter);
var logger = LoggerManager.LoggerFactory.CreateLogger <AacAudioEncoder>();
// Enable high quality (defaults to medium, 0x40)
SetConverterProperty(converter, AudioConverterPropertyId.CodecQuality, 0x60);
if (settings.TryGetValue("BitRate", out int bitRate))
{
if (bitRate > 256 && info.Channels == 1)
{
logger.LogWarning("The maximum bitrate for 1-channel audio is 256 kbps.");
bitRate = 256;
}
else if (bitRate < 64 && info.Channels == 2)
{
logger.LogWarning("The minimum bitrate for 2-channel audio is 64 kbps.");
bitRate = 64;
}
SetConverterProperty(converter, AudioConverterPropertyId.BitRate, bitRate * 1000);
// Set the control mode (constrained is the default)
var controlMode = BitrateControlMode.VariableConstrained;
if (settings.TryGetValue("ControlMode", out string controlModeValue))
{
if (controlModeValue.Equals("Average", StringComparison.OrdinalIgnoreCase))
{
controlMode = BitrateControlMode.LongTermAverage;
}
else if (controlModeValue.Equals("Constant", StringComparison.OrdinalIgnoreCase))
{
controlMode = BitrateControlMode.Constant;
}
}
SetConverterProperty(converter, AudioConverterPropertyId.BitRateControlMode, (uint)controlMode);
}
else
{
// Enable a true variable bitrate
SetConverterProperty(converter, AudioConverterPropertyId.BitRateControlMode,
(uint)BitrateControlMode.Variable);
// Use a default VBR quality index of 9
SetConverterProperty(converter, AudioConverterPropertyId.VbrQuality,
settings.TryGetValue("VBRQuality", out int quality)
? _vbrQualities[quality]
: _vbrQualities[9]);
}
// Setting the ConverterConfig property to null resynchronizes the converter settings
_audioFile.SetProperty(ExtendedAudioFilePropertyId.ConverterConfig, IntPtr.Zero);
}
