public StreamDataMonitorEventArgs(AudioProperties properties, byte[] buffer, int offset, int length)
{
Properties = properties;
Buffer = buffer;
Offset = offset;
Length = length;
}
public IeeeStream(IAudioStream sourceStream)
: base(sourceStream)
{
if (sourceStream.Properties.Format == AudioFormat.IEEE && sourceStream.Properties.BitDepth == 32)
{
passthrough = true;
properties = sourceStream.Properties;
}
else if (sourceStream.Properties.Format == AudioFormat.LPCM && sourceStream.Properties.BitDepth == 16)
{
ReadAndConvert = ReadPCM16;
properties = new AudioProperties(sourceStream.Properties.Channels,
sourceStream.Properties.SampleRate, 32, AudioFormat.IEEE);
}
else if (sourceStream.Properties.Format == AudioFormat.LPCM && sourceStream.Properties.BitDepth == 24)
{
ReadAndConvert = ReadPCM24;
properties = new AudioProperties(sourceStream.Properties.Channels,
sourceStream.Properties.SampleRate, 32, AudioFormat.IEEE);
}
else
{
throw new ArgumentException("unsupported source format: " + sourceStream.Properties);
}
sourceBuffer = new ByteBuffer();
}
public NAudioSinkStream(IAudioStream sourceStream)
{
AudioProperties sourceProperties = sourceStream.Properties;
if (sourceProperties.Format == AudioFormat.LPCM)
{
waveFormat = WaveFormat.CreateCustomFormat(
WaveFormatEncoding.Pcm,
sourceProperties.SampleRate,
sourceProperties.Channels,
sourceProperties.SampleRate * sourceProperties.Channels * sourceProperties.SampleByteSize,
sourceProperties.Channels * sourceProperties.SampleByteSize, sourceProperties.BitDepth);
}
else if (sourceProperties.Format == AudioFormat.IEEE)
{
waveFormat = WaveFormat.CreateCustomFormat(
WaveFormatEncoding.IeeeFloat,
sourceProperties.SampleRate,
sourceProperties.Channels,
sourceProperties.SampleRate * sourceProperties.Channels * sourceProperties.SampleByteSize,
sourceProperties.Channels * sourceProperties.SampleByteSize, sourceProperties.BitDepth);
}
else
{
throw new ArgumentException("unsupported source format: " + sourceProperties.ToString());
}
this.sourceStream = sourceStream;
}
public static ByteTimeWarp Convert(TimeWarp timeWarp, AudioProperties properties)
{
return(new ByteTimeWarp {
From = TimeUtil.TimeSpanToBytes(timeWarp.From, properties),
To = TimeUtil.TimeSpanToBytes(timeWarp.To, properties)
});
}
public NAudioSourceStream(WaveStream sourceStream)
{
WaveFormat sourceFormat = sourceStream.WaveFormat;
AudioFormat format;
// check for supported formats:
if (sourceFormat.Encoding == WaveFormatEncoding.Pcm && sourceFormat.BitsPerSample == 16)
{
format = AudioFormat.LPCM;
}
else if (sourceFormat.Encoding == WaveFormatEncoding.Pcm && sourceFormat.BitsPerSample == 24)
{
format = AudioFormat.LPCM;
}
else if (sourceFormat.Encoding == WaveFormatEncoding.IeeeFloat && sourceFormat.BitsPerSample == 32)
{
format = AudioFormat.IEEE;
}
else
{
throw new ArgumentException(String.Format("unsupported source format: {0}bit {1}Hz {2}ch {3}",
sourceFormat.BitsPerSample, sourceFormat.SampleRate, sourceFormat.Channels, sourceFormat.Encoding));
}
this.sourceStream = sourceStream;
this.properties = new AudioProperties(sourceFormat.Channels, sourceFormat.SampleRate, sourceFormat.BitsPerSample, format);
}
public MixerStream(int channels, int sampleRate)
{
properties = new AudioProperties(channels, sampleRate, 32, AudioFormat.IEEE);
sourceStreams = new List <IAudioStream>();
length = 0;
position = 0;
sourceBuffer = new ByteBuffer();
}
public CircularMemoryWriterStream(AudioProperties properties, MemoryStream target) : base(target, properties)
{
if (target.Capacity == 0)
{
throw new Exception("Circular stream must have a fixed capacity");
}
_bufferFillLevel = 0;
_bufferHead = 0;
_position = 0;
}
/// <summary>
/// Creates a MonoStream that downmixes all channels of the source stream into a single mono channel
/// and outputs the mono mix to multiple output channels.
/// </summary>
/// <param name="sourceStream">the stream to downmix to mono</param>
/// <param name="outputChannels">the number of channel into which the mono mix should be split</param>
public MonoStream(IAudioStream sourceStream, int outputChannels) : base(sourceStream)
{
if (!(sourceStream.Properties.Format == AudioFormat.IEEE && sourceStream.Properties.BitDepth == 32))
{
throw new ArgumentException("unsupported source format: " + sourceStream.Properties);
}
properties = new AudioProperties(outputChannels, sourceStream.Properties.SampleRate,
sourceStream.Properties.BitDepth, sourceStream.Properties.Format);
sourceBuffer = new ByteBuffer();
downmix = true;
}
/// <summary>
/// Decodes an audio stream through FFmpeg from an encoded file stream.
/// Accepts an optional file name hint to help FFmpeg determine the format of
/// the encoded data.
/// </summary>
/// <param name="stream">the stream to decode</param>
/// <param name="fileName">optional file name hint for FFmpeg</param>
public FFmpegSourceStream(Stream stream, string fileName)
{
sourceStream = stream;
reader = new FFmpegReader(stream, FFmpeg.Type.Audio, fileName);
if (reader.AudioOutputConfig.length == long.MinValue)
{
/*
* length == FFmpeg AV_NOPTS_VALUE
*
* This means that for the opened file/format, there is no length/PTS data
* available, which also makes seeking more or less impossible.
*
* As a workaround, an index could be created to map the frames to the file
* position, and then seek by file position. The index could be created by
* linearly reading through the file (decoding not necessary), and creating
* a mapping of AVPacket.pos to the frame time.
*/
throw new FileNotSeekableException();
}
properties = new AudioProperties(
reader.AudioOutputConfig.format.channels,
reader.AudioOutputConfig.format.sample_rate,
reader.AudioOutputConfig.format.sample_size * 8,
reader.AudioOutputConfig.format.sample_size == 4 ? AudioFormat.IEEE : AudioFormat.LPCM);
readerPosition = 0;
sourceBuffer = new byte[reader.AudioOutputConfig.frame_size *
reader.AudioOutputConfig.format.channels *
reader.AudioOutputConfig.format.sample_size];
sourceBufferPosition = 0;
sourceBufferLength = -1; // -1 means buffer empty, >= 0 means valid buffer data
// determine first PTS to handle cases where it is > 0
try {
Position = 0;
}
catch (InvalidOperationException) {
readerFirstPTS = readerPosition;
readerPosition = 0;
Console.WriteLine("first PTS = " + readerFirstPTS);
}
seekIndexCreated = false;
}
public ResamplingStream(IAudioStream sourceStream, ResamplingQuality quality)
: base(sourceStream)
{
if (!(sourceStream.Properties.Format == AudioFormat.IEEE && sourceStream.Properties.BitDepth == 32))
{
throw new ArgumentException("unsupported source format: " + sourceStream.Properties);
}
properties = new AudioProperties(sourceStream.Properties.Channels, sourceStream.Properties.SampleRate,
sourceStream.Properties.BitDepth, sourceStream.Properties.Format);
this.quality = quality;
SetupResampler();
sourceBuffer = new ByteBuffer();
TargetSampleRate = properties.SampleRate;
position = 0;
}
public NAudioSourceStream(WaveStream sourceStream)
{
AudioProperties sourceProperties = GetAudioProperties(sourceStream.WaveFormat);
// check for supported formats:
if (sourceProperties.Format == AudioFormat.LPCM && sourceProperties.BitDepth == 16)
{
}
else if (sourceProperties.Format == AudioFormat.LPCM && sourceProperties.BitDepth == 24)
{
}
else if (sourceProperties.Format == AudioFormat.IEEE && sourceProperties.BitDepth == 32)
{
}
else
{
throw new ArgumentException(String.Format("unsupported source format: {0}bit {1}Hz {2}ch {3}",
sourceProperties.BitDepth, sourceProperties.SampleRate, sourceProperties.Channels, sourceProperties.Format));
}
this.sourceStream = sourceStream;
this.properties = sourceProperties;
}
/// <summary>
/// Creates a SurroundDownmixStream that downmixes surround sound of the source stream and outputs a stereo stream.
/// </summary>
/// <param name="sourceStream">the stream to downmix to stereo</param>
public SurroundDownmixStream(IAudioStream sourceStream) : base(sourceStream)
{
if (!(sourceStream.Properties.Format == AudioFormat.IEEE && sourceStream.Properties.BitDepth == 32))
{
throw new ArgumentException("unsupported source format: " + sourceStream.Properties);
}
int sourceChannels = sourceStream.Properties.Channels;
unsafe
{
if (sourceChannels == 4)
{
// Assume 4.0 quad layout
DownmixFunction = DownmixQuad;
}
else if (sourceChannels == 6)
{
// Assume 5.0/5.1 surround
DownmixFunction = Downmix51;
}
else if (sourceChannels == 8)
{
// Assume 7.0/7.1
DownmixFunction = Downmix71;
}
else
{
throw new Exception("Unsupported number of input channels: " + sourceChannels);
}
}
properties = new AudioProperties(2, sourceStream.Properties.SampleRate,
sourceStream.Properties.BitDepth, sourceStream.Properties.Format);
sourceBuffer = new ByteBuffer();
}
public NullStream(AudioProperties audioProperties, long length)
{
this.audioProperties = audioProperties;
this.length = length;
this.position = 0;
}
public BlockingFixedLengthFifoStream(AudioProperties properties, int capacity) : base(properties, capacity)
{
_readPosition = 0;
_endOfInput = false;
}
public static TimeSpan BytesToTimeSpan(long bytes, Streams.AudioProperties audioProperties)
{
return(new TimeSpan((long)((double)bytes / audioProperties.SampleBlockByteSize / audioProperties.SampleRate * SECS_TO_TICKS)));
}
public CircularMemoryWriterStream(AudioProperties properties, int capacity) : this(properties, new MemoryStream(new byte[capacity]))
{
}
public static long TimeSpanToBytes(TimeSpan timeSpan, Streams.AudioProperties audioProperties)
{
long bytes = (long)(timeSpan.TotalSeconds * audioProperties.SampleRate * audioProperties.SampleBlockByteSize);
return(bytes - (bytes % audioProperties.SampleBlockByteSize));
}
public MemoryWriterStream(MemoryStream target, AudioProperties properties) :
base(target, properties)
{
}
public SineGeneratorStream(int sampleRate, float frequency, TimeSpan length)
{
this.properties = new AudioProperties(1, sampleRate, 32, AudioFormat.IEEE);
this.frequency = frequency;
this.length = TimeUtil.TimeSpanToBytes(length, properties);
}
public MemoryWriterStream(AudioProperties properties) :
base(new MemoryStream(), properties)
{
}
public MemorySourceStream(MemoryStream source, AudioProperties properties)
{
this.source = source;
this.properties = properties;
}
