/// <summary>
/// Removes and audio stream from a mixer.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="mixerChannel">The mixer channel.</param>
public static void RemoveFromMixer(AudioStream audioStream, int mixerChannel)
{
if (audioStream == null || !audioStream.IsAudioLoaded())
throw new Exception("Audio file null or not audio not loaded");
if (mixerChannel == int.MinValue) throw new Exception("Mixer channel not initialized");
//lock (Lock)
{
DebugHelper.WriteLine($"RemoveFromMixer {audioStream.Description} {audioStream.Channel}...");
BassMix.BASS_Mixer_ChannelPause(audioStream.Channel);
Bass.BASS_ChannelLock(mixerChannel, true);
foreach (var channel in audioStream.Channels)
{
BassMix.BASS_Mixer_ChannelRemove(channel);
}
Bass.BASS_ChannelLock(mixerChannel, false);
DebugHelper.WriteLine("done");
}
}
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.Channel == 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.Channel, 1, BASSFlag.BASS_STREAM_DECODE));
if (audioStream.Channel == 0)
throw new Exception("Cannot load " + audioStream.Filename + ". Error code: " + Bass.BASS_ErrorGetCode());
Bass.BASS_ChannelSetAttribute(audioStream.Channel, 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.Channel,
BASSFlag.BASS_FX_FREESOURCE | BASSFlag.BASS_STREAM_DECODE));
if (audioStream.Channel == 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.Channel);
audioStream.DefaultSampleRate = GetSampleRate(audioStream.Channel);
SetReplayGain(audioStream);
SetPosition(audioStream, 0);
}
/// <summary>
/// Sets the length of an audio stream.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
public static void SetLength(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded())
throw new Exception("Audio file null or not audio not loaded");
audioStream.Length = Bass.BASS_ChannelGetLength(audioStream.Channel);
}
/// <summary>
/// Adds an audio stream to a mixer
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="mixerChannel">The mixer channel.</param>
public static void AddToMixer(AudioStream audioStream, int mixerChannel)
{
if (audioStream == null || !audioStream.IsAudioLoaded())
throw new Exception("Audio file null or not audio not loaded");
if (mixerChannel == int.MinValue) throw new Exception("Mixer channel not initialized");
DebugHelper.WriteLine($"AddToMixer {audioStream.Description} {mixerChannel} {audioStream.Channel}...");
AddChannelToMixer(audioStream.Channel, mixerChannel);
DebugHelper.WriteLine("done");
}
/// <summary>
/// Does an audio stream power down effect asynchronously
/// </summary>
/// <param name="audioStream">The audio stream.</param>
private static void PowerDownAsync(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
var freq = audioStream.DefaultSampleRate;
var interval = (int)(BpmHelper.GetDefaultLoopLength(audioStream.Bpm) * 1000) / 128;
// set the volume slide
Bass.BASS_ChannelSlideAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_VOL, 0F, interval * 8);
var percentValue = 0.70;
while (freq > 100)
{
percentValue = percentValue / 1.2;
interval = (int)(interval * 0.9D);
freq = (int)(audioStream.DefaultSampleRate * percentValue);
if (freq <= 100 || audioStream.Channel == int.MinValue) continue;
Bass.BASS_ChannelSlideAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_FREQ, freq, interval);
Thread.Sleep(interval);
}
Pause(audioStream);
if (!audioStream.IsAudioLoaded()) return;
Bass.BASS_ChannelSetAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_FREQ,
audioStream.DefaultSampleRate);
SetVolume(audioStream, 100M);
}
/// <summary>
/// Sets the replay gain for a channel.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
private static void SetReplayGain(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded())
throw new Exception("Audio file null or not audio not loaded");
if (!audioStream.IsGainChannelInitialized() && audioStream.Gain == 0) return;
var volume = DecibelToPercent(audioStream.Gain);
DebugHelper.WriteLine("SetReplayGain for " + audioStream + " to " + volume);
if (!audioStream.IsGainChannelInitialized())
{
audioStream.GainChannel = Bass.BASS_ChannelSetFX(audioStream.Channel, BASSFXType.BASS_FX_BFX_VOLUME, int.MaxValue);
}
var volumeParameters = new BASS_BFX_VOLUME(volume, BASSFXChan.BASS_BFX_CHANALL);
Bass.BASS_FXSetParameters(audioStream.GainChannel, volumeParameters);
}
/// <summary>
/// Does an audio stream power down effect asynchronously
/// </summary>
/// <param name="audioStream">The audio stream.</param>
private static void SmoothPauseAsync(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
var volume = ((float)GetVolume(audioStream)) / 100F;
SetVolumeSlide(audioStream, volume, 0F, 0.15D);
Thread.Sleep(150);
if (!audioStream.IsAudioLoaded()) return;
BassMix.BASS_Mixer_ChannelPause(audioStream.Channel);
SetVolume(audioStream, volume);
}
/// <summary>
/// Sets the duration and start/end volumes for an audio stream volume slide.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="startVolume">The start volume.</param>
/// <param name="endVolume">The end volume.</param>
/// <param name="sampleDuration">Sample length duration.</param>
public static void SetVolumeSlide(AudioStream audioStream, float startVolume, float endVolume,
long sampleDuration)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
var seconds = audioStream.SamplesToSeconds(sampleDuration);
SetVolumeSlide(audioStream, startVolume, endVolume, seconds);
}
/// <summary>
/// Gets the current audioStream position.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <returns>The current audio stream position</returns>
public static long GetPosition(AudioStream audioStream)
{
if (audioStream == null) return 0;
return !audioStream.IsAudioLoaded() ? 0 : Bass.BASS_ChannelGetPosition(audioStream.Channel);
}
/// <summary>
/// Pause an audio stream
/// </summary>
/// <param name="audioStream">The audio stream.</param>
public static void Pause(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
BassMix.BASS_Mixer_ChannelPause(audioStream.Channel);
}
/// <summary>
/// Sets the audio stream position
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="samplePosition">The audio stream position.</param>
public static void SetPosition(AudioStream audioStream, long samplePosition)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
if (samplePosition < 0 || samplePosition > audioStream.Length) return;
var secondPosition = TimeFormatHelper.GetFormattedSeconds(audioStream.SamplesToSeconds(samplePosition));
DebugHelper.WriteLine($"SetPosition {audioStream.Description} {secondPosition} {samplePosition}");
Bass.BASS_ChannelSetPosition(audioStream.Channel, samplePosition);
DebugHelper.WriteLine($"SetPosition END {audioStream.Description} {secondPosition} {samplePosition}");
}
/// <summary>
/// Resets the audio stream pitch.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
public static void ResetPitch(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
Bass.BASS_ChannelSetAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_TEMPO_PITCH, 0F);
}
/// <summary>
/// Sets the audio stream pitch, based on a percent pitch value (0 - 200, 100 being 'normal' pitch)
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="pitch">The pitch.</param>
public static void SetPitch(AudioStream audioStream, double pitch)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
DebugHelper.WriteLine("SetPitch");
float sampleRate = audioStream.DefaultSampleRate;
Bass.BASS_ChannelSetAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_TEMPO_FREQ, sampleRate);
}
/// <summary>
/// Unloads the audio of an audio stream
/// </summary>
/// <param name="audioStream">The audio stream.</param>
public static void UnloadAudio(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded())
throw new Exception("Audio file null or not audio not loaded");
DebugHelper.WriteLine($"UnloadAudio {audioStream.Description}...");
foreach (var channel in audioStream.Channels)
{
Bass.BASS_StreamFree(channel);
}
audioStream.Channels.Clear();
AudioDataHelper.UnloadAudioData(audioStream);
DebugHelper.WriteLine("done");
}
/// <summary>
/// Plays an audio stream
/// </summary>
/// <param name="audioStream">The audio stream.</param>
public static void Play(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
//lock (Lock)
//{
DebugHelper.WriteLine("Play Audio Stream (" + audioStream.Description + ")");
BassMix.BASS_Mixer_ChannelPlay(audioStream.Channel);
// }
}
/// <summary>
/// Gets the audio stream volume.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <returns>The tracks volume</returns>
public static decimal GetVolume(AudioStream audioStream)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return 0;
return GetVolume(audioStream.Channel);
}
/// <summary>
/// Sets the duration and start/end volumes for an audio stream volume slide.
/// </summary>
/// <param name="audioStream">The audio stream.</param>
/// <param name="startVolume">The start volume as a percentage (0 - 1).</param>
/// <param name="endVolume">The end volume as a percentage (0 - 1).</param>
/// <param name="seconds">The seconds.</param>
public static void SetVolumeSlide(AudioStream audioStream, float startVolume, float endVolume, double seconds)
{
if (audioStream == null || !audioStream.IsAudioLoaded()) return;
// set start volume
SetVolume(audioStream, startVolume);
var miliseconds = (int)(seconds * 1000);
// set the volume slide
Bass.BASS_ChannelSlideAttribute(audioStream.Channel, BASSAttribute.BASS_ATTRIB_VOL, endVolume, miliseconds);
}