/// <summary>
/// Convert WAV to AAC
/// </summary>
/// <param name="waveFileName"></param>
/// <param name="mp3FileName"></param>
/// <param name="bitRate"></param>
public void WaveToAAC(string waveFileName, string aacFileName, int bitRate = 44100)
{
using (MediaFoundationReader reader = new MediaFoundationReader(waveFileName))
{
NAudio.MediaFoundation.MediaType mt = new NAudio.MediaFoundation.MediaType();
mt.MajorType = NAudio.MediaFoundation.MediaTypes.MFMediaType_Audio;
mt.SubType = NAudio.MediaFoundation.AudioSubtypes.MFAudioFormat_AAC;
mt.BitsPerSample = 16;
mt.SampleRate = bitRate;
mt.ChannelCount = 2;
using (MediaFoundationEncoder mfe = new MediaFoundationEncoder(mt))
{
mfe.Encode(aacFileName, reader);
}
//MediaFoundationEncoder.EncodeToAac(reader, aacFileName, bitRate);
}
}
public override void ProcessItem(IJob job, IJobItem item)
{
var bitRate = job.Preset.BitRate;
var sampleRate = job.Preset.SampleRate;
var tempdir = Path.GetTempPath();
var tempfile = Path.Combine(tempdir, DateTime.Now.Ticks + "." + job.Preset.Extension);
var subType = this.GetAudioSubtypeForExtension(job.Preset.Extension);
var waveFormat = new WaveFormat(sampleRate, 2);
var mediaType = MediaFoundationEncoder.SelectMediaType(subType, waveFormat, bitRate);
if (mediaType != null)
{
using (var decoder = new MediaFoundationReader(item.LastFile))
{
using (var encoder = new MediaFoundationEncoder(mediaType))
{
encoder.Encode(tempfile, decoder);
}
}
}
item.TemporaryFiles.Add(tempfile);
}
// Token: 0x06000945 RID: 2373 RVA: 0x0001B0A0 File Offset: 0x000192A0
private long ConvertOneBuffer(IMFSinkWriter writer, int streamIndex, IWaveProvider inputProvider, long position, byte[] managedBuffer)
{
long num = 0L;
IMFMediaBuffer imfmediaBuffer = MediaFoundationApi.CreateMemoryBuffer(managedBuffer.Length);
int count;
imfmediaBuffer.GetMaxLength(out count);
IMFSample imfsample = MediaFoundationApi.CreateSample();
imfsample.AddBuffer(imfmediaBuffer);
IntPtr destination;
int num2;
imfmediaBuffer.Lock(out destination, out count, out num2);
int num3 = inputProvider.Read(managedBuffer, 0, count);
if (num3 > 0)
{
num = MediaFoundationEncoder.BytesToNsPosition(num3, inputProvider.WaveFormat);
Marshal.Copy(managedBuffer, 0, destination, num3);
imfmediaBuffer.SetCurrentLength(num3);
imfmediaBuffer.Unlock();
imfsample.SetSampleTime(position);
imfsample.SetSampleDuration(num);
writer.WriteSample(streamIndex, imfsample);
}
else
{
imfmediaBuffer.Unlock();
}
Marshal.ReleaseComObject(imfsample);
Marshal.ReleaseComObject(imfmediaBuffer);
return(num);
}
/// <summary>
/// Helper function to simplify encoding to MP3
/// By default, will only be available on Windows 8 and above
/// </summary>
/// <param name="inputProvider">Input provider, must be PCM</param>
/// <param name="outputFile">Output file path, should end with .mp3</param>
/// <param name="desiredBitRate">Desired bitrate. Use GetEncodeBitrates to find the possibilities for your input type</param>
public static void EncodeToMp3(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
var mediaType = SelectMediaType(AudioSubtypes.MFAudioFormat_MP3, inputProvider.WaveFormat, desiredBitRate);
using (var encoder = new MediaFoundationEncoder(mediaType))
{
encoder.Encode(outputFile, inputProvider);
}
}
/// <summary>
/// Queries the available bitrates for a given encoding output type, sample rate and number of channels
/// </summary>
/// <param name="audioSubtype">Audio subtype - a value from the AudioSubtypes class</param>
/// <param name="sampleRate">The sample rate of the PCM to encode</param>
/// <param name="channels">The number of channels of the PCM to encode</param>
/// <returns>An array of available bitrates in average bits per second</returns>
// Token: 0x0600093A RID: 2362 RVA: 0x0001AAE0 File Offset: 0x00018CE0
public static int[] GetEncodeBitrates(Guid audioSubtype, int sampleRate, int channels)
{
return((from br in (from mt in MediaFoundationEncoder.GetOutputMediaTypes(audioSubtype)
where mt.SampleRate == sampleRate && mt.ChannelCount == channels
select mt.AverageBytesPerSecond * 8).Distinct <int>()
orderby br
select br).ToArray <int>());
}
/// <summary>
/// Helper function to simplify encoding to MP3
/// By default, will only be available on Windows 8 and above
/// </summary>
/// <param name="inputProvider">Input provider, must be PCM</param>
/// <param name="outputFile">Output file path, should end with .mp3</param>
/// <param name="desiredBitRate">Desired bitrate. Use GetEncodeBitrates to find the possibilities for your input type</param>
public static void EncodeToMp3(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
var mediaType = SelectMediaType(AudioSubtypes.MFAudioFormat_MP3, inputProvider.WaveFormat, desiredBitRate);
using (var encoder = new MediaFoundationEncoder(mediaType))
{
encoder.Encode(outputFile, inputProvider);
}
}
/// <summary>
/// Helper function to simplify encoding to MP3
/// By default, will only be available on Windows 8 and above
/// </summary>
/// <param name="inputProvider">Input provider, must be PCM</param>
/// <param name="outputFile">Output file path, should end with .mp3</param>
/// <param name="desiredBitRate">Desired bitrate. Use GetEncodeBitrates to find the possibilities for your input type</param>
public static void EncodeToMp3(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
var mediaType = SelectMediaType(AudioSubtypes.MFAudioFormat_MP3, inputProvider.WaveFormat, desiredBitRate);
if (mediaType == null) throw new InvalidOperationException("No suitable MP3 encoders available");
using (var encoder = new MediaFoundationEncoder(mediaType))
{
encoder.Encode(outputFile, inputProvider);
}
}
/// <summary>
/// Helper function to simplify encoding to AAC
/// By default, will only be available on Windows 7 and above
/// </summary>
/// <param name="inputProvider">Input provider, must be PCM</param>
/// <param name="outputFile">Output file path, should end with .mp4 (or .aac on Windows 8)</param>
/// <param name="desiredBitRate">Desired bitrate. Use GetEncodeBitrates to find the possibilities for your input type</param>
public static void EncodeToAac(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
// Information on configuring an AAC media type can be found here:
// http://msdn.microsoft.com/en-gb/library/windows/desktop/dd742785%28v=vs.85%29.aspx
var mediaType = SelectMediaType(AudioSubtypes.MFAudioFormat_AAC, inputProvider.WaveFormat, desiredBitRate);
using (var encoder = new MediaFoundationEncoder(mediaType))
{
// should AAC container have ADTS, or is that just for ADTS?
// http://www.hydrogenaudio.org/forums/index.php?showtopic=97442
encoder.Encode(outputFile, inputProvider);
}
}
/// <summary>
/// Tries to find the encoding media type with the closest bitrate to that specified
/// </summary>
/// <param name="audioSubtype">Audio subtype, a value from AudioSubtypes</param>
/// <param name="inputFormat">Your encoder input format (used to check sample rate and channel count)</param>
/// <param name="desiredBitRate">Your desired bitrate</param>
/// <returns>The closest media type, or null if none available</returns>
// Token: 0x0600093F RID: 2367 RVA: 0x0001AE7C File Offset: 0x0001907C
public static MediaType SelectMediaType(Guid audioSubtype, WaveFormat inputFormat, int desiredBitRate)
{
return((from mt in MediaFoundationEncoder.GetOutputMediaTypes(audioSubtype)
where mt.SampleRate == inputFormat.SampleRate && mt.ChannelCount == inputFormat.Channels
select new
{
MediaType = mt,
Delta = Math.Abs(desiredBitRate - mt.AverageBytesPerSecond * 8)
} into mt
orderby mt.Delta
select mt.MediaType).FirstOrDefault <MediaType>());
}
public static void EncodeToWma(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
MediaType mediaType = MediaFoundationEncoder.SelectMediaType(AudioSubtypes.MFAudioFormat_WMAudioV8, inputProvider.WaveFormat, desiredBitRate);
if (mediaType == null)
{
throw new InvalidOperationException("No suitable WMA encoders available");
}
using (MediaFoundationEncoder mediaFoundationEncoder = new MediaFoundationEncoder(mediaType))
{
mediaFoundationEncoder.Encode(outputFile, inputProvider);
}
}
/// <summary>
/// Helper function to simplify encoding to AAC
/// By default, will only be available on Windows 7 and above
/// </summary>
/// <param name="inputProvider">Input provider, must be PCM</param>
/// <param name="outputFile">Output file path, should end with .mp4 (or .aac on Windows 8)</param>
/// <param name="desiredBitRate">Desired bitrate. Use GetEncodeBitrates to find the possibilities for your input type</param>
public static void EncodeToAac(IWaveProvider inputProvider, string outputFile, int desiredBitRate = 192000)
{
// Information on configuring an AAC media type can be found here:
// http://msdn.microsoft.com/en-gb/library/windows/desktop/dd742785%28v=vs.85%29.aspx
var mediaType = SelectMediaType(AudioSubtypes.MFAudioFormat_AAC, inputProvider.WaveFormat, desiredBitRate);
using (var encoder = new MediaFoundationEncoder(mediaType))
{
// should AAC container have ADTS, or is that just for ADTS?
// http://www.hydrogenaudio.org/forums/index.php?showtopic=97442
encoder.Encode(outputFile, inputProvider);
}
}
public void Encode(string outputFile, IWaveProvider inputProvider)
{
if (inputProvider.WaveFormat.Encoding != WaveFormatEncoding.Pcm && inputProvider.WaveFormat.Encoding != WaveFormatEncoding.IeeeFloat)
{
throw new ArgumentException("Encode input format must be PCM or IEEE float");
}
MediaType mediaType = new MediaType(inputProvider.WaveFormat);
IMFSinkWriter imfsinkWriter = MediaFoundationEncoder.CreateSinkWriter(outputFile);
try
{
int num;
imfsinkWriter.AddStream(this.outputMediaType.MediaFoundationObject, out num);
imfsinkWriter.SetInputMediaType(num, mediaType.MediaFoundationObject, null);
this.PerformEncode(imfsinkWriter, num, inputProvider);
}
finally
{
Marshal.ReleaseComObject(imfsinkWriter);
Marshal.ReleaseComObject(mediaType.MediaFoundationObject);
}
}
private void Encode()
{
using (var reader = new MediaFoundationReader(_fileLocation))
{
var SelectedOutputFormat = new Encoder()
{
Name = "MP3",
Guid = AudioSubtypes.MFAudioFormat_MP3,
Extension = ".mp3"
};
var list = MediaFoundationEncoder.GetOutputMediaTypes(SelectedOutputFormat.Guid)
.Select(mf => new MediaTypeUtils(mf))
.ToList();
string outputUrl = SelectSaveFile();
if (outputUrl == null) return;
using (var encoder = new MediaFoundationEncoder(list[0].MediaType))
{
encoder.Encode(outputUrl, reader);
}
}
}
private void Encode()
{
if (String.IsNullOrEmpty(InputFile)||!File.Exists(InputFile))
{
MessageBox.Show("Please select a valid input file to convert");
return;
}
if (SelectedMediaType == null || SelectedMediaType.MediaType == null)
{
MessageBox.Show("Please select a valid output format");
return;
}
using (var reader = new MediaFoundationReader(InputFile))
{
string outputUrl = SelectSaveFile(SelectedOutputFormat.Name, SelectedOutputFormat.Extension);
if (outputUrl == null) return;
using (var encoder = new MediaFoundationEncoder(SelectedMediaType.MediaType))
{
encoder.Encode(outputUrl, reader);
}
}
}
/// <summary>
/// Transcodes the source audio to the target format and quality.
/// </summary>
/// <param name="formatType">Format to convert this audio to.</param>
/// <param name="quality">Quality of the processed output audio. For streaming formats, it can be one of the following: Low (96 kbps), Medium (128 kbps), Best (192 kbps). For WAV formats, it can be one of the following: Low (11kHz ADPCM), Medium (22kHz ADPCM), Best (44kHz PCM)</param>
/// <param name="targetFileName">Name of the file containing the processed source audio. Must be null for Wav and Adpcm. Must not be null for streaming compressed formats.</param>
public void ConvertFormat(ConversionFormat formatType, ConversionQuality quality, string targetFileName)
{
if (disposed)
throw new ObjectDisposedException("AudioContent");
switch (formatType)
{
case ConversionFormat.Adpcm:
#if WINDOWS
ConvertWav(new AdpcmWaveFormat(QualityToSampleRate(quality), format.ChannelCount));
break;
#else
throw new NotSupportedException("Adpcm encoding supported on Windows only");
#endif
case ConversionFormat.Pcm:
#if WINDOWS
ConvertWav(new WaveFormat(QualityToSampleRate(quality), format.ChannelCount));
break;
#elif LINUX
// TODO Do the conversion for Linux platform
throw new NotSupportedException("Pcm has not been implemented on this platform");
#else //MONOMAC
targetFileName = Guid.NewGuid().ToString() + ".wav";
if (!ConvertAudio.Convert(fileName, targetFileName, AudioFormatType.LinearPCM, MonoMac.AudioToolbox.AudioFileType.WAVE, quality)) {
throw new InvalidDataException("Failed to convert to PCM");
}
Read(targetFileName);
if (File.Exists(targetFileName))
File.Delete(targetFileName);
break;
#endif
case ConversionFormat.WindowsMedia:
#if WINDOWS
reader.Position = 0;
MediaFoundationEncoder.EncodeToWma(reader, targetFileName, QualityToBitRate(quality));
break;
#else
throw new NotSupportedException("WindowsMedia encoding supported on Windows only");
#endif
case ConversionFormat.Xma:
throw new NotSupportedException("XMA is not a supported encoding format. It is specific to the Xbox 360.");
case ConversionFormat.ImaAdpcm:
#if WINDOWS
ConvertWav(new ImaAdpcmWaveFormat(QualityToSampleRate(quality), format.ChannelCount, 4));
break;
#else
throw new NotImplementedException("ImaAdpcm has not been implemented on this platform");
#endif
case ConversionFormat.Aac:
#if WINDOWS
reader.Position = 0;
var mediaType = SelectMediaType (AudioSubtypes.MFAudioFormat_AAC, reader.WaveFormat, QualityToBitRate (quality));
if (mediaType == null) {
throw new InvalidDataException ("Cound not find a suitable mediaType to convert to.");
}
using (var encoder = new MediaFoundationEncoder (mediaType)) {
encoder.Encode (targetFileName, reader);
}
break;
#elif LINUX
// TODO: Code for Linux convertion
throw new NotImplementedException("Aac has not been implemented on this platform");
#else //MONOMAC
if (!ConvertAudio.Convert(fileName, targetFileName, AudioFormatType.MPEG4AAC, MonoMac.AudioToolbox.AudioFileType.MPEG4, quality)) {
throw new InvalidDataException("Failed to convert to AAC");
}
break;
#endif
case ConversionFormat.Vorbis:
throw new NotImplementedException("Vorbis is not yet implemented as an encoding format.");
}
}
/// <summary>
/// Creates an MP3-file from the downloaded video file
/// </summary>
/// <param name="bytesPerSecond">Audio bitrate in bytes per second</param>
/// <param name="input"></param>
/// <param name="output"></param>
private void PerformConversion(int bytesPerSecond, string input, string output)
{
var allMediaTypes = new Dictionary<Guid, List<MediaType>>();
var list = MediaFoundationEncoder.GetOutputMediaTypes(AudioSubtypes.MFAudioFormat_MP3).ToList();
allMediaTypes[AudioSubtypes.MFAudioFormat_MP3] = list;
// Keep audio properties from the original video file
var supportedMediaTypes = allMediaTypes[AudioSubtypes.MFAudioFormat_MP3]
.Where(m => m != null)
.Where(m => m.SampleRate == inputWaveFormat.SampleRate)
.Where(m => m.ChannelCount == inputWaveFormat.Channels)
.ToList();
var mediaType = supportedMediaTypes.FirstOrDefault(m => m.AverageBytesPerSecond == bytesPerSecond) ??
supportedMediaTypes.FirstOrDefault();
if (mediaType != null)
{
using (var reader = new MediaFoundationReader(input))
{
using (var encoder = new MediaFoundationEncoder(mediaType))
{
encoder.Encode(output, reader);
}
}
}
// Cleanup before throwing cancellation
if (tokenSource.IsCancellationRequested)
{
File.Delete(output);
File.Delete(input);
tokenSource.Token.ThrowIfCancellationRequested();
}
UpdateWorkStatus(WorkStatus.Finished);
}
