public static void LoadAudio(AudioStream audioStream)
{
// abort if audio data already loaded
if (audioStream.IsAudioLoaded())
{
return;
}
AudioDataHelper.LoadAudioData(audioStream);
var channel = Bass.BASS_StreamCreateFile(audioStream.AudioData.DataPointer,
0,
audioStream.AudioData.Data.Length,
BASSFlag.BASS_SAMPLE_FLOAT | BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_STREAM_PRESCAN);
audioStream.AddChannel(channel);
if (audioStream.ChannelId == 0)
{
throw new Exception("Cannot load " + audioStream.Filename + ". Error code: " + Bass.BASS_ErrorGetCode());
}
// DebugHelper.WriteLine("Creating reverse FX stream " + audioStream.Description + "...");
audioStream.AddChannel(BassFx.BASS_FX_ReverseCreate(audioStream.ChannelId, 1, BASSFlag.BASS_STREAM_DECODE));
if (audioStream.ChannelId == 0)
{
throw new Exception("Cannot load " + audioStream.Filename + ". Error code: " + Bass.BASS_ErrorGetCode());
}
Bass.BASS_ChannelSetAttribute(audioStream.ChannelId, BASSAttribute.BASS_ATTRIB_REVERSE_DIR,
(float)BASSFXReverse.BASS_FX_RVS_FORWARD);
// DebugHelper.WriteLine("Creating tempo FX stream " + audioStream.Description + "...");
audioStream.AddChannel(BassFx.BASS_FX_TempoCreate(audioStream.ChannelId,
BASSFlag.BASS_FX_FREESOURCE | BASSFlag.BASS_STREAM_DECODE));
if (audioStream.ChannelId == 0)
{
throw new Exception("Cannot load " + audioStream.Filename + ". Error code: " + Bass.BASS_ErrorGetCode());
}
// DebugHelper.WriteLine("Calculating track length " + audioStream.Description + "...");
audioStream.Length = Bass.BASS_ChannelGetLength(audioStream.ChannelId);
audioStream.DefaultSampleRate = GetSampleRate(audioStream.ChannelId);
SetReplayGain(audioStream);
SetPosition(audioStream, 0);
}
internal AudioTrackBass(Stream data, bool quick = false, bool loop = false)
{
procs = new BASS_FILEPROCS(ac_Close, ac_Length, ac_Read, ac_Seek);
Preview = quick;
Looping = loop;
BASSFlag flags = Preview ? 0 : (BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_STREAM_PRESCAN);
if (data == null)
{
throw new AudioNotLoadedException();
}
else
{
//encapsulate incoming stream with async buffer if it isn't already.
DataStream = data as AsyncBufferStream;
if (DataStream == null)
{
DataStream = new AsyncBufferStream(data, quick ? 8 : -1);
}
audioStreamPrefilter = Bass.BASS_StreamCreateFileUser(BASSStreamSystem.STREAMFILE_NOBUFFER, flags, procs, IntPtr.Zero);
}
if (Preview)
{
audioStream = audioStreamForwards = audioStreamPrefilter;
}
else
{
audioStream = audioStreamForwards = BassFx.BASS_FX_TempoCreate(audioStreamPrefilter, loop ? BASSFlag.BASS_MUSIC_LOOP : BASSFlag.BASS_DEFAULT);
audioStreamBackwards = BassFx.BASS_FX_ReverseCreate(audioStreamPrefilter, 5f, BASSFlag.BASS_DEFAULT);
Bass.BASS_ChannelSetAttribute(audioStream, BASSAttribute.BASS_ATTRIB_TEMPO_OPTION_USE_QUICKALGO, Bass.TRUE);
Bass.BASS_ChannelSetAttribute(audioStream, BASSAttribute.BASS_ATTRIB_TEMPO_OPTION_OVERLAP_MS, 4);
Bass.BASS_ChannelSetAttribute(audioStream, BASSAttribute.BASS_ATTRIB_TEMPO_OPTION_SEQUENCE_MS, 30);
}
Length = (Bass.BASS_ChannelBytes2Seconds(audioStream, Bass.BASS_ChannelGetLength(audioStream)) * 1000);
Bass.BASS_ChannelGetAttribute(audioStream, BASSAttribute.BASS_ATTRIB_FREQ, ref initialAudioFrequency);
currentAudioFrequency = initialAudioFrequency;
AudioEngine.RegisterTrack(this);
}
/// <summary>
/// Loads the sample audio data.
/// </summary>
/// <param name="sample">The sample to load.</param>
/// <returns>The loaded sample</returns>
private Sample LoadSampleAudioData(Sample sample)
{
// abort if audio data already loaded
if (sample.Channel != int.MinValue)
{
return(sample);
}
Debug.Print("Loading sample Audio Data " + sample.Description);
sample.AudioData = File.ReadAllBytes(sample.Filename);
sample.AudioDataHandle = GCHandle.Alloc(sample.AudioData, GCHandleType.Pinned);
sample.Channel = Bass.BASS_StreamCreateFile(sample.AudioDataPointer, 0, sample.AudioData.Length, BASSFlag.BASS_SAMPLE_FLOAT | BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_STREAM_PRESCAN);
if (sample.Channel == 0)
{
var errorCode = Bass.BASS_ErrorGetCode();
throw new Exception("Cannot load sample " + sample.Filename + ". Error code: " + errorCode.ToString());
}
sample.Channel = BassFx.BASS_FX_ReverseCreate(sample.Channel, 1, BASSFlag.BASS_STREAM_DECODE);
if (sample.Channel == 0)
{
throw new Exception("Cannot load sample " + sample.Filename);
}
Bass.BASS_ChannelSetAttribute(sample.Channel, BASSAttribute.BASS_ATTRIB_REVERSE_DIR, (float)BASSFXReverse.BASS_FX_RVS_FORWARD);
sample.Channel = BassFx.BASS_FX_TempoCreate(sample.Channel, BASSFlag.BASS_FX_FREESOURCE | BASSFlag.BASS_STREAM_DECODE);
if (sample.Channel == 0)
{
throw new Exception("Cannot load sample " + sample.Filename);
}
sample.Length = Bass.BASS_ChannelGetLength(sample.Channel);
sample.DefaultSampleRate = BassHelper.GetSampleRate(sample.Channel);
return(sample);
}
