public AudioOutputPreview GetAudioPreview(AudioTrack inputTrack, AudioEncodingViewModel audioVM)
{
HBAudioEncoder encoder = audioVM.HBAudioEncoder;
var outputPreviewTrack = new AudioOutputPreview
{
Name = inputTrack.NoTrackDisplay,
Encoder = encoder.DisplayName
};
if (encoder.IsPassthrough)
{
// For passthrough encodes, we need to make sure the input track is of the right type
if (!Encoders.AudioEncoderIsCompatible(inputTrack, encoder) && encoder.ShortName != "copy")
{
return(null);
}
HBContainer container = Encoders.GetContainer(this.Profile.ContainerName);
if (encoder.ShortName == "copy" && (inputTrack.Codec == AudioCodec.Dts || inputTrack.Codec == AudioCodec.DtsHD) && container.DefaultExtension == "mp4")
{
this.PassthroughWarningText = EncodingRes.DtsMp4Warning;
this.PassthroughWarningVisible = true;
return(outputPreviewTrack);
}
}
// Find out what the real mixdown, sample rate and bitrate will be.
HBMixdown mixdown;
int sampleRate, bitrate;
if (encoder.ShortName == "copy")
{
if (Encoders.AudioEncoderIsCompatible(inputTrack, encoder))
{
return(outputPreviewTrack);
}
if (this.Profile.AudioEncoderFallback == null)
{
encoder = Encoders.AudioEncoders.First(a => !a.IsPassthrough);
}
else
{
encoder = Encoders.GetAudioEncoder(this.Profile.AudioEncoderFallback);
}
mixdown = Encoders.GetDefaultMixdown(encoder, inputTrack.ChannelLayout);
sampleRate = 0;
bitrate = 0;
outputPreviewTrack.Encoder = encoder.DisplayName;
}
else
{
mixdown = audioVM.SelectedMixdown.Mixdown;
sampleRate = audioVM.SampleRate;
bitrate = audioVM.SelectedBitrate.Bitrate;
}
HBMixdown previewMixdown;
previewMixdown = Encoders.SanitizeMixdown(mixdown, encoder, inputTrack.ChannelLayout);
int previewSampleRate = sampleRate;
if (previewSampleRate == 0)
{
previewSampleRate = inputTrack.SampleRate;
}
int previewBitrate = bitrate;
if (previewBitrate == 0)
{
previewBitrate = Encoders.GetDefaultBitrate(encoder, previewSampleRate, previewMixdown);
}
else
{
previewBitrate = Encoders.SanitizeAudioBitrate(previewBitrate, encoder, previewSampleRate, previewMixdown);
}
outputPreviewTrack.Mixdown = previewMixdown.DisplayName;
outputPreviewTrack.SampleRate = DisplayConversions.DisplaySampleRate(previewSampleRate);
if (audioVM.EncodeRateType == AudioEncodeRateType.Bitrate)
{
if (previewBitrate >= 0)
{
outputPreviewTrack.Quality = previewBitrate + " kbps";
}
else
{
outputPreviewTrack.Quality = string.Empty;
}
}
else
{
outputPreviewTrack.Quality = "CQ " + audioVM.AudioQuality;
}
var modifiers = new List <string>();
if (audioVM.Gain != 0)
{
modifiers.Add(string.Format("{0}{1} dB", audioVM.Gain > 0 ? "+" : string.Empty, audioVM.Gain));
}
if (audioVM.Drc != 0)
{
modifiers.Add("DRC " + audioVM.Drc.ToString());
}
outputPreviewTrack.Modifiers = string.Join(", ", modifiers);
return(outputPreviewTrack);
}