/// <summary>
/// Determines whether if the specified output format is supported
/// </summary>
/// <param name="shareMode">The share mode.</param>
/// <param name="desiredFormat">The desired format.</param>
/// <returns>True if the format is supported</returns>
public bool IsFormatSupported(AudioClientShareMode shareMode,
WaveFormatProvider desiredFormat)
{
WaveFormatExtensible closestMatchFormat;
return(IsFormatSupported(shareMode, desiredFormat, out closestMatchFormat));
}
public static extern MmResult acmFormatSuggest(
IntPtr hAcmDriver,
[In, MarshalAs(UnmanagedType.CustomMarshaler, MarshalType = "Nequeo.IO.Audio.Formats.WaveFormatCustomMarshaler")]
WaveFormatProvider sourceFormat,
[In, Out, MarshalAs(UnmanagedType.CustomMarshaler, MarshalType = "Nequeo.IO.Audio.Formats.WaveFormatCustomMarshaler")]
WaveFormatProvider destFormat,
int sizeDestFormat,
AcmFormatSuggestFlags suggestFlags);
/// <summary>
/// Initializes a new instance of MonoToStereoSampleProvider
/// </summary>
/// <param name="source">Source sample provider</param>
public MonoToStereoSampleProvider(ISampleProvider source)
{
if (source.WaveFormat.Channels != 1)
{
throw new ArgumentException("Source must be mono");
}
this.source = source;
this.waveFormat = WaveFormatProvider.CreateIeeeFloatWaveFormat(source.WaveFormat.SampleRate, 2);
}
/// <summary>
/// Creates a new ACM stream to convert one format to another, using a
/// specified driver identified and wave filter
/// </summary>
/// <param name="driverId">the driver identifier</param>
/// <param name="sourceFormat">the source format</param>
/// <param name="waveFilter">the wave filter</param>
public AcmStream(IntPtr driverId, WaveFormatProvider sourceFormat, WaveFilter waveFilter)
{
int sourceBufferSize = System.Math.Max(16384, sourceFormat.AverageBytesPerSecond);
this.sourceFormat = sourceFormat;
sourceBufferSize -= (sourceBufferSize % sourceFormat.BlockAlign);
MmException.Try(AcmInterop.acmDriverOpen(out driverHandle, driverId, 0), "acmDriverOpen");
MmException.Try(AcmInterop.acmStreamOpen(out streamHandle, driverHandle,
sourceFormat, sourceFormat, waveFilter, IntPtr.Zero, IntPtr.Zero, AcmStreamOpenFlags.NonRealTime), "acmStreamOpen");
streamHeader = new AcmStreamHeader(streamHandle, sourceBufferSize, SourceToDest(sourceBufferSize));
}
public static extern MmResult acmStreamOpen(
out IntPtr hAcmStream,
IntPtr hAcmDriver,
[In, MarshalAs(UnmanagedType.CustomMarshaler, MarshalType = "Nequeo.IO.Audio.Formats.WaveFormatCustomMarshaler")]
WaveFormatProvider sourceFormat,
[In, MarshalAs(UnmanagedType.CustomMarshaler, MarshalType = "Nequeo.IO.Audio.Formats.WaveFormatCustomMarshaler")]
WaveFormatProvider destFormat,
[In] WaveFilter waveFilter,
IntPtr callback,
IntPtr instance,
AcmStreamOpenFlags openFlags);
/// <summary>
/// Creates a Wave File Reader based on an input stream
/// </summary>
/// <param name="inputStream">The input stream containing a WAV file including header</param>
public WaveReader(Stream inputStream)
{
this.waveStream = inputStream;
var chunkReader = new WaveFileChunkReader();
chunkReader.ReadWaveHeader(inputStream);
this.waveFormat = chunkReader.WaveFormat;
this.dataPosition = chunkReader.DataChunkPosition;
this.dataChunkLength = chunkReader.DataChunkLength;
this.chunks = chunkReader.RiffChunks;
Position = 0;
}
/// <summary>
/// Initializes the Audio Client
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="streamFlags">Stream Flags</param>
/// <param name="bufferDuration">Buffer Duration</param>
/// <param name="periodicity">Periodicity</param>
/// <param name="waveFormat">Wave Format</param>
/// <param name="audioSessionGuid">Audio Session GUID (can be null)</param>
public void Initialize(AudioClientShareMode shareMode,
AudioClientStreamFlags streamFlags,
long bufferDuration,
long periodicity,
WaveFormatProvider waveFormat,
Guid audioSessionGuid)
{
int hresult = audioClientInterface.Initialize(shareMode, streamFlags, bufferDuration, periodicity, waveFormat, ref audioSessionGuid);
Marshal.ThrowExceptionForHR(hresult);
// may have changed the mix format so reset it
mixFormat = null;
}
/// <summary>
/// Creates a new ACM frame decompressor
/// </summary>
/// <param name="sourceFormat">The MP3 source format</param>
public AcmMp3FrameDecompressor(WaveFormatProvider sourceFormat)
{
this.pcmFormat = AcmStream.SuggestPcmFormat(sourceFormat);
try
{
conversionStream = new AcmStream(sourceFormat, pcmFormat);
}
catch (Exception)
{
disposed = true;
GC.SuppressFinalize(this);
throw;
}
}
/// <summary>
/// Creates a media type from a WaveFormat
/// </summary>
public static IMFMediaType CreateMediaTypeFromWaveFormat(WaveFormatProvider waveFormat)
{
var mediaType = CreateMediaType();
try
{
MediaFoundationInterop.MFInitMediaTypeFromWaveFormatEx(mediaType, waveFormat, Marshal.SizeOf(waveFormat));
}
catch (Exception)
{
Marshal.ReleaseComObject(mediaType);
throw;
}
return(mediaType);
}
/// <summary>
/// Converts from an ISampleProvider (IEEE float) to a 16 bit PCM IWaveProvider.
/// Number of channels and sample rate remain unchanged.
/// </summary>
/// <param name="sourceProvider">The input source provider</param>
public SampleToWaveProvider24(ISampleProvider sourceProvider)
{
if (sourceProvider.WaveFormat.Encoding != WaveFormatEncoding.IeeeFloat)
{
throw new ArgumentException("Input source provider must be IEEE float", "sourceProvider");
}
if (sourceProvider.WaveFormat.BitsPerSample != 32)
{
throw new ArgumentException("Input source provider must be 32 bit", "sourceProvider");
}
waveFormat = new WaveFormatProvider(sourceProvider.WaveFormat.SampleRate, 24, sourceProvider.WaveFormat.Channels);
this.sourceProvider = sourceProvider;
volume = 1.0f;
}
/// <summary>
/// Suggests an appropriate PCM format that the compressed format can be converted
/// to in one step
/// </summary>
/// <param name="compressedFormat">The compressed format</param>
/// <returns>The PCM format</returns>
public static WaveFormatProvider SuggestPcmFormat(WaveFormatProvider compressedFormat)
{
// create a PCM format
WaveFormatProvider suggestedFormat = new WaveFormatProvider(compressedFormat.SampleRate, 16, compressedFormat.Channels);
MmException.Try(AcmInterop.acmFormatSuggest(IntPtr.Zero, compressedFormat, suggestedFormat, Marshal.SizeOf(suggestedFormat), AcmFormatSuggestFlags.FormatTag), "acmFormatSuggest");
/*IntPtr suggestedFormatPointer = WaveFormat.MarshalToPtr(suggestedFormat);
* IntPtr compressedFormatPointer = WaveFormat.MarshalToPtr(compressedFormat);
* MmResult result = AcmInterop.acmFormatSuggest2(IntPtr.Zero, compressedFormatPointer, suggestedFormatPointer, Marshal.SizeOf(suggestedFormat), AcmFormatSuggestFlags.FormatTag);
* suggestedFormat = WaveFormat.MarshalFromPtr(suggestedFormatPointer);
* Marshal.FreeHGlobal(suggestedFormatPointer);
* Marshal.FreeHGlobal(compressedFormatPointer);
* MmException.Try(result, "acmFormatSuggest");*/
return(suggestedFormat);
}
/// <summary>
/// Creates a new ACM stream to convert one format to another. Note that
/// not all conversions can be done in one step
/// </summary>
/// <param name="sourceFormat">The source audio format</param>
/// <param name="destFormat">The destination audio format</param>
public AcmStream(WaveFormatProvider sourceFormat, WaveFormatProvider destFormat)
{
try
{
streamHandle = IntPtr.Zero;
this.sourceFormat = sourceFormat;
int sourceBufferSize = System.Math.Max(65536, sourceFormat.AverageBytesPerSecond);
sourceBufferSize -= (sourceBufferSize % sourceFormat.BlockAlign);
MmException.Try(AcmInterop.acmStreamOpen(out streamHandle, IntPtr.Zero, sourceFormat, destFormat, null, IntPtr.Zero, IntPtr.Zero, AcmStreamOpenFlags.NonRealTime), "acmStreamOpen");
int destBufferSize = SourceToDest(sourceBufferSize);
streamHeader = new AcmStreamHeader(streamHandle, sourceBufferSize, destBufferSize);
driverHandle = IntPtr.Zero;
}
catch
{
// suppress the finalise and clean up resources
Dispose();
throw;
}
}
/// <summary>
/// Determines if the specified output format is supported in shared mode
/// </summary>
/// <param name="shareMode">Share Mode</param>
/// <param name="desiredFormat">Desired Format</param>
/// <param name="closestMatchFormat">Output The closest match format.</param>
/// <returns>True if the format is supported</returns>
public bool IsFormatSupported(AudioClientShareMode shareMode, WaveFormatProvider desiredFormat, out WaveFormatExtensible closestMatchFormat)
{
int hresult = audioClientInterface.IsFormatSupported(shareMode, desiredFormat, out closestMatchFormat);
// S_OK is 0, S_FALSE = 1
if (hresult == 0)
{
// directly supported
return(true);
}
if (hresult == 1)
{
return(false);
}
if (hresult == (int)AudioClientErrors.UnsupportedFormat)
{
return(false);
}
Marshal.ThrowExceptionForHR(hresult);
// shouldn't get here
throw new NotSupportedException("Unknown hresult " + hresult);
}
public void ReadWaveHeader(System.IO.Stream stream)
{
this.dataChunkPosition = -1;
this.waveFormat = null;
this.riffChunks = new List <RiffChunk>();
this.dataChunkLength = 0;
var br = new BinaryReader(stream);
ReadRiffHeader(br);
this.riffSize = br.ReadUInt32(); // read the file size (minus 8 bytes)
int riffType = br.ReadInt32();
if (riffType != ChunkIdentifier.ChunkIdentifierToInt32("WAVE"))
{
throw new FormatException("Not a WAVE file - no WAVE header");
}
if (isRf64)
{
ReadDs64Chunk(br);
}
int dataChunkId = ChunkIdentifier.ChunkIdentifierToInt32("data");
int formatChunkId = ChunkIdentifier.ChunkIdentifierToInt32("fmt ");
// sometimes a file has more data than is specified after the RIFF header
long stopPosition = System.Math.Min(riffSize + 8, stream.Length);
// this -8 is so we can be sure that there are at least 8 bytes for a chunk id and length
while (stream.Position <= stopPosition - 8)
{
Int32 chunkIdentifier = br.ReadInt32();
var chunkLength = br.ReadUInt32();
if (chunkIdentifier == dataChunkId)
{
dataChunkPosition = stream.Position;
if (!isRf64) // we already know the dataChunkLength if this is an RF64 file
{
dataChunkLength = chunkLength;
}
stream.Position += chunkLength;
}
else if (chunkIdentifier == formatChunkId)
{
if (chunkLength > Int32.MaxValue)
{
throw new InvalidDataException(string.Format("Format chunk length must be between 0 and {0}.", Int32.MaxValue));
}
waveFormat = WaveFormatProvider.FromFormatChunk(br, (int)chunkLength);
}
else
{
// check for invalid chunk length
if (chunkLength > stream.Length - stream.Position)
{
if (strictMode)
{
}
// an exception will be thrown further down if we haven't got a format and data chunk yet,
// otherwise we will tolerate this file despite it having corrupt data at the end
break;
}
if (storeAllChunks)
{
if (chunkLength > Int32.MaxValue)
{
throw new InvalidDataException(string.Format("RiffChunk chunk length must be between 0 and {0}.", Int32.MaxValue));
}
riffChunks.Add(GetRiffChunk(stream, chunkIdentifier, (int)chunkLength));
}
stream.Position += chunkLength;
}
}
if (waveFormat == null)
{
throw new FormatException("Invalid WAV file - No fmt chunk found");
}
if (dataChunkPosition == -1)
{
throw new FormatException("Invalid WAV file - No data chunk found");
}
}
/// <summary>
/// Ensures valid AIFF header and then finds data offset.
/// </summary>
/// <param name="stream">The stream, positioned at the start of audio data</param>
/// <param name="format">The format found</param>
/// <param name="dataChunkPosition">The position of the data chunk</param>
/// <param name="dataChunkLength">The length of the data chunk</param>
/// <param name="chunks">Additional chunks found</param>
public static void ReadAiffHeader(System.IO.Stream stream, out WaveFormatProvider format, out long dataChunkPosition, out int dataChunkLength, List <AiffChunk> chunks)
{
dataChunkPosition = -1;
format = null;
BinaryReader br = new BinaryReader(stream);
if (ReadChunkName(br) != "FORM")
{
throw new FormatException("Not an AIFF file - no FORM header.");
}
uint fileSize = ConvertInt(br.ReadBytes(4));
string formType = ReadChunkName(br);
if (formType != "AIFC" && formType != "AIFF")
{
throw new FormatException("Not an AIFF file - no AIFF/AIFC header.");
}
dataChunkLength = 0;
while (br.BaseStream.Position < br.BaseStream.Length)
{
AiffChunk nextChunk = ReadChunkHeader(br);
if (nextChunk.ChunkName == "COMM")
{
short numChannels = ConvertShort(br.ReadBytes(2));
uint numSampleFrames = ConvertInt(br.ReadBytes(4));
short sampleSize = ConvertShort(br.ReadBytes(2));
double sampleRate = IEEE.ConvertFromIeeeExtended(br.ReadBytes(10));
format = new WaveFormatProvider((int)sampleRate, (int)sampleSize, (int)numChannels);
if (nextChunk.ChunkLength > 18 && formType == "AIFC")
{
// In an AIFC file, the compression format is tacked on to the COMM chunk
string compress = new string(br.ReadChars(4)).ToLower();
if (compress != "none")
{
throw new FormatException("Compressed AIFC is not supported.");
}
br.ReadBytes((int)nextChunk.ChunkLength - 22);
}
else
{
br.ReadBytes((int)nextChunk.ChunkLength - 18);
}
}
else if (nextChunk.ChunkName == "SSND")
{
uint offset = ConvertInt(br.ReadBytes(4));
uint blockSize = ConvertInt(br.ReadBytes(4));
dataChunkPosition = nextChunk.ChunkStart + 16 + offset;
dataChunkLength = (int)nextChunk.ChunkLength - 8;
br.ReadBytes((int)nextChunk.ChunkLength - 8);
}
else
{
if (chunks != null)
{
chunks.Add(nextChunk);
}
br.ReadBytes((int)nextChunk.ChunkLength);
}
if (nextChunk.ChunkName == "\0\0\0\0")
{
break;
}
}
if (format == null)
{
throw new FormatException("Invalid AIFF file - No COMM chunk found.");
}
if (dataChunkPosition == -1)
{
throw new FormatException("Invalid AIFF file - No SSND chunk found.");
}
}
/// <summary>
/// Creates and wraps a new IMFMediaType object based on a WaveFormat
/// </summary>
/// <param name="waveFormat">WaveFormat</param>
public MediaType(WaveFormatProvider waveFormat)
{
mediaType = MediaFoundationApi.CreateMediaTypeFromWaveFormat(waveFormat);
}
internal static extern void MFInitMediaTypeFromWaveFormatEx([In] IMFMediaType pMFType, [In] WaveFormatProvider pWaveFormat, [In] int cbBufSize);
/// <summary>
/// Opens MP3 from a stream rather than a file
/// Will not dispose of this stream itself
/// </summary>
/// <param name="inputStream">The incoming stream containing MP3 data</param>
/// <param name="frameDecompressorBuilder">Factory method to build a frame decompressor</param>
public Mp3Reader(Stream inputStream, FrameDecompressorBuilder frameDecompressorBuilder)
{
// Calculated as a double to minimize rounding errors
mp3Stream = inputStream;
id3v2Tag = Id3v2Tag.ReadTag(mp3Stream);
dataStartPosition = mp3Stream.Position;
var firstFrame = Mp3Frame.LoadFromStream(mp3Stream);
double bitRate = firstFrame.BitRate;
xingHeader = XingHeader.LoadXingHeader(firstFrame);
// If the header exists, we can skip over it when decoding the rest of the file
if (xingHeader != null)
{
dataStartPosition = mp3Stream.Position;
}
// workaround for a longstanding issue with some files failing to load
// because they report a spurious sample rate change
var secondFrame = Mp3Frame.LoadFromStream(mp3Stream);
if (secondFrame != null &&
(secondFrame.SampleRate != firstFrame.SampleRate ||
secondFrame.ChannelMode != firstFrame.ChannelMode))
{
// assume that the first frame was some kind of VBR/LAME header that we failed to recognise properly
dataStartPosition = secondFrame.FileOffset;
// forget about the first frame, the second one is the first one we really care about
firstFrame = secondFrame;
}
this.mp3DataLength = mp3Stream.Length - dataStartPosition;
// try for an ID3v1 tag as well
mp3Stream.Position = mp3Stream.Length - 128;
byte[] tag = new byte[128];
mp3Stream.Read(tag, 0, 128);
if (tag[0] == 'T' && tag[1] == 'A' && tag[2] == 'G')
{
id3v1Tag = tag;
this.mp3DataLength -= 128;
}
mp3Stream.Position = dataStartPosition;
// create a temporary MP3 format before we know the real bitrate
this.Mp3WaveFormat = new Mp3WaveFormat(firstFrame.SampleRate, firstFrame.ChannelMode == ChannelMode.Mono ? 1 : 2, firstFrame.FrameLength, (int)bitRate);
CreateTableOfContents();
this.tocIndex = 0;
// [Bit rate in Kilobits/sec] = [Length in kbits] / [time in seconds]
// = [Length in bits ] / [time in milliseconds]
// Note: in audio, 1 kilobit = 1000 bits.
bitRate = (mp3DataLength * 8.0 / TotalSeconds());
mp3Stream.Position = dataStartPosition;
// now we know the real bitrate we can create an accurate
this.Mp3WaveFormat = new Mp3WaveFormat(firstFrame.SampleRate, firstFrame.ChannelMode == ChannelMode.Mono ? 1 : 2, firstFrame.FrameLength, (int)bitRate);
decompressor = frameDecompressorBuilder(Mp3WaveFormat);
this.waveFormat = decompressor.OutputFormat;
this.bytesPerSample = (decompressor.OutputFormat.BitsPerSample) / 8 * decompressor.OutputFormat.Channels;
// no MP3 frames have more than 1152 samples in them
// some MP3s I seem to get double
this.decompressBuffer = new byte[1152 * bytesPerSample * 2];
}
/// <summary>
/// Stream wave provider.
/// </summary>
/// <param name="stream">The stream containing the data.</param>
public StreamWaveReader(System.IO.Stream stream)
{
_stream = stream;
_waveFormat = new WaveFormatProvider(44100, 16, 2);
}
/// <summary>
/// Initialises a new instance of SampleProviderConverterBase
/// </summary>
/// <param name="source">Source Wave provider</param>
public SampleProviderConverterBase(IWaveProvider source)
{
this.source = source;
this.waveFormat = WaveFormatProvider.CreateIeeeFloatWaveFormat(source.WaveFormat.SampleRate, source.WaveFormat.Channels);
}
/// <summary>
/// Creates an ACM MP3 Frame decompressor. This is the default with NAudio
/// </summary>
/// <param name="mp3Format">A WaveFormat object based </param>
/// <returns></returns>
public static IMp3FrameDecompressor CreateAcmFrameDecompressor(WaveFormatProvider mp3Format)
{
// new DmoMp3FrameDecompressor(this.Mp3WaveFormat);
return(new AcmMp3FrameDecompressor(mp3Format));
}
/// <summary>
/// Marshal managed to native
/// </summary>
public IntPtr MarshalManagedToNative(object ManagedObj)
{
return(WaveFormatProvider.MarshalToPtr((WaveFormatProvider)ManagedObj));
}
/// <summary>
/// Marshal Native to Managed
/// </summary>
public object MarshalNativeToManaged(IntPtr pNativeData)
{
return(WaveFormatProvider.MarshalFromPtr(pNativeData));
}
/// <summary>
/// Stream wave provider.
/// </summary>
/// <param name="stream">The stream containing the data.</param>
public StreamWaveProvider(Stream stream)
{
_stream = stream;
_waveFormat = new WaveFormatProvider(44100, 16, 2);
}
