public void Configure(IAudioFrameHeader frameHeader)
{
AacFrameHeader aacFrameHeader = (AacFrameHeader)frameHeader;
this.CodecPrivateData = AacConfigurator.BuildCodecPrivateData(aacFrameHeader);
this.Name = frameHeader.Name;
this.Channels = (int)aacFrameHeader.ChannelConfig;
this.SamplingFrequency = frameHeader.SamplingFrequency;
this.SetConfigured();
}
private static string BuildCodecPrivateData(AacFrameHeader aacFrameHeader)
{
Func <AacFrameHeader, string> privateDataFactory = AacDecoderSettings.Parameters.CodecPrivateDataFactory;
if (null != privateDataFactory)
{
return(privateDataFactory(aacFrameHeader));
}
AacDecoderParameters.WaveFormatEx configurationFormat = AacDecoderSettings.Parameters.ConfigurationFormat;
SM.Media.Mmreg.WaveFormatEx waveFormatEx;
switch (configurationFormat)
{
case AacDecoderParameters.WaveFormatEx.RawAac:
if (!AacDecoderSettings.Parameters.UseRawAac)
{
throw new NotSupportedException("AacDecoderSettings.Parameters.UseRawAac must be enabled when using AacDecoderParameters.WaveFormatEx.RawAac");
}
RawAacWaveInfo rawAacWaveInfo1 = new RawAacWaveInfo();
rawAacWaveInfo1.nChannels = aacFrameHeader.ChannelConfig;
rawAacWaveInfo1.nSamplesPerSec = (uint)aacFrameHeader.SamplingFrequency;
RawAacWaveInfo rawAacWaveInfo2 = rawAacWaveInfo1;
TimeSpan duration = aacFrameHeader.Duration;
double num1;
if (duration.TotalSeconds > 0.0)
{
double num2 = (double)aacFrameHeader.FrameLength;
duration = aacFrameHeader.Duration;
double totalSeconds = duration.TotalSeconds;
num1 = num2 / totalSeconds;
}
else
{
num1 = 0.0;
}
int num3 = (int)(uint)num1;
rawAacWaveInfo2.nAvgBytesPerSec = (uint)num3;
rawAacWaveInfo1.pbAudioSpecificConfig = aacFrameHeader.AudioSpecificConfig;
waveFormatEx = (SM.Media.Mmreg.WaveFormatEx)rawAacWaveInfo1;
break;
case AacDecoderParameters.WaveFormatEx.HeAac:
HeAacWaveInfo heAacWaveInfo = new HeAacWaveInfo();
heAacWaveInfo.wPayloadType = AacDecoderSettings.Parameters.UseRawAac ? (ushort)0 : (ushort)1;
heAacWaveInfo.nChannels = aacFrameHeader.ChannelConfig;
heAacWaveInfo.nSamplesPerSec = (uint)aacFrameHeader.SamplingFrequency;
heAacWaveInfo.pbAudioSpecificConfig = aacFrameHeader.AudioSpecificConfig;
waveFormatEx = (SM.Media.Mmreg.WaveFormatEx)heAacWaveInfo;
break;
default:
throw new NotSupportedException("Unknown WaveFormatEx type: " + (object)configurationFormat);
}
return(WaveFormatExExtensions.ToCodecPrivateData(waveFormatEx));
}
public static byte[] DefaultAudioSpecificConfigFactory(AacFrameHeader aacFrameHeader)
{
int num = aacFrameHeader.Profile + 1;
if (1 == num && AacAudioSpecificConfig.RemapObjectType1.HasValue)
{
num = AacAudioSpecificConfig.RemapObjectType1.Value;
Debug.WriteLine("AacConfigurator.AudioSpecificConfig: Changing AAC object type from 1 to {0}.", (object)num);
}
return(new byte[2]
{
(byte)(num << 3 | aacFrameHeader.FrequencyIndex >> 1 & 7),
(byte)(aacFrameHeader.FrequencyIndex << 7 | (int)aacFrameHeader.ChannelConfig << 3)
});
}
public static byte[] DefaultAudioSpecificConfigFactory(AacFrameHeader aacFrameHeader)
{
var objectType = aacFrameHeader.Profile + 1;
if (1 == objectType && RemapObjectType1.HasValue)
{
objectType = RemapObjectType1.Value;
Debug.WriteLine("AacConfigurator.AudioSpecificConfig: Changing AAC object type from 1 to {0}.", objectType);
}
return new[]
{
(byte) ((objectType << 3) | ((aacFrameHeader.FrequencyIndex >> 1) & 0x07)),
(byte) ((aacFrameHeader.FrequencyIndex << 7) | (aacFrameHeader.ChannelConfig << 3))
};
}
static string BuildCodecPrivateData(AacFrameHeader aacFrameHeader)
{
var factory = AacDecoderSettings.Parameters.CodecPrivateDataFactory;
if (null != factory)
return factory(aacFrameHeader);
WaveFormatEx w;
var waveFormatEx = AacDecoderSettings.Parameters.ConfigurationFormat;
switch (waveFormatEx)
{
case AacDecoderParameters.WaveFormatEx.RawAac:
if (!AacDecoderSettings.Parameters.UseRawAac)
throw new NotSupportedException("AacDecoderSettings.Parameters.UseRawAac must be enabled when using AacDecoderParameters.WaveFormatEx.RawAac");
w = new RawAacWaveInfo
{
nChannels = aacFrameHeader.ChannelConfig,
nSamplesPerSec = (uint)aacFrameHeader.SamplingFrequency,
nAvgBytesPerSec = (uint)(aacFrameHeader.Duration.TotalSeconds <= 0 ? 0 : aacFrameHeader.FrameLength / aacFrameHeader.Duration.TotalSeconds),
pbAudioSpecificConfig = aacFrameHeader.AudioSpecificConfig
};
break;
case AacDecoderParameters.WaveFormatEx.HeAac:
w = new HeAacWaveInfo
{
wPayloadType = (ushort)(AacDecoderSettings.Parameters.UseRawAac ? HeAacWaveInfo.PayloadType.Raw : HeAacWaveInfo.PayloadType.ADTS),
nChannels = aacFrameHeader.ChannelConfig,
nSamplesPerSec = (uint)aacFrameHeader.SamplingFrequency,
pbAudioSpecificConfig = aacFrameHeader.AudioSpecificConfig
};
break;
default:
throw new NotSupportedException("Unknown WaveFormatEx type: " + waveFormatEx);
}
return w.ToCodecPrivateData();
}
