#pragma warning restore CS0067
public AudioExtrasSource()
{
_audioEncoder = new AudioEncoder();
_audioOpts = new AudioSourceOptions {
AudioSource = AudioSourcesEnum.None
};
}
#pragma warning restore CS0067
public AudioExtrasSource()
{
_audioEncoder = new AudioEncoder();
_audioFormatManager = new MediaFormatManager <AudioFormat>(_audioEncoder.SupportedFormats);
_audioOpts = new AudioSourceOptions {
AudioSource = AudioSourcesEnum.None
};
}
/// <summary>
/// Instantiates an audio source that can generate output samples from a variety of different
/// non-live sources.
/// </summary>
/// <param name="audioOptions">Optional. The options that determine the type of audio to stream to the remote party.
/// Example type of audio sources are music, silence, white noise etc.</param>
public AudioExtrasSource(
AudioEncoder audioEncoder,
AudioSourceOptions audioOptions = null)
{
_audioEncoder = audioEncoder;
_audioOpts = audioOptions ?? new AudioSourceOptions {
AudioSource = AudioSourcesEnum.None
};
}
/// <summary>
/// Creates an audio only RTP session that can supply an audio stream to the caller.
/// </summary>
/// <param name="audioOptions">The options that determine the type of audio to stream to the remote party. Example
/// type of audio sources are music, silence, white noise etc.</param>
/// <param name="audioCodecs">The audio codecs to support.</param>
/// <param name="bindAddress">Optional. If specified this address will be used as the bind address for any RTP
/// and control sockets created. Generally this address does not need to be set. The default behaviour
/// is to bind to [::] or 0.0.0.0,d depending on system support, which minimises network routing
/// causing connection issues.</param>
public RtpAudioSession(AudioSourceOptions audioOptions, List <SDPMediaFormatsEnum> audioCodecs,
IPAddress bindAddress = null) :
base(false, false, false, bindAddress)
{
if (audioCodecs == null || audioCodecs.Count() == 0)
{
_audioCodecs = new List <SDPMediaFormatsEnum>
{
SDPMediaFormatsEnum.PCMU, SDPMediaFormatsEnum.PCMA, SDPMediaFormatsEnum.G722
};
}
else if (audioCodecs.Any(x =>
!(x == SDPMediaFormatsEnum.PCMU || x == SDPMediaFormatsEnum.PCMA || x == SDPMediaFormatsEnum.G722)))
{
throw new ApplicationException("Only PCMA, PCMU and G722 audio codecs are supported.");
}
_audioOpts = audioOptions;
_audioCodecs = audioCodecs ?? _audioCodecs;
var audioCapabilities = new List <SDPMediaFormat>();
foreach (var codec in _audioCodecs)
{
audioCapabilities.Add(new SDPMediaFormat(codec));
}
// RTP event support.
SDPMediaFormat rtpEventFormat = new SDPMediaFormat(DTMF_EVENT_PAYLOAD_ID);
rtpEventFormat.SetFormatAttribute($"{SDP.TELEPHONE_EVENT_ATTRIBUTE}/{RTP_TIMESTAMP_RATE}");
rtpEventFormat.SetFormatParameterAttribute("0-16");
audioCapabilities.Add(rtpEventFormat);
// Add a local audio track to the RTP session.
MediaStreamTrack audioTrack = new MediaStreamTrack(SDPMediaTypesEnum.audio, false, audioCapabilities);
base.addTrack(audioTrack);
}
/// <summary>
/// Sets the source for the session. Overrides any existing source.
/// </summary>
/// <param name="sourceOptions">The new audio source.</param>
public void SetSource(AudioSourceOptions sourceOptions)
{
// If required start the audio source.
if (sourceOptions != null)
{
_audioStreamTimer?.Dispose();
_audioStreamReader?.Close();
StopSendFromAudioStream();
if (sourceOptions.AudioSource == AudioSourcesEnum.None)
{
// Do nothing, all other sources have already been stopped.
}
else if (sourceOptions.AudioSource == AudioSourcesEnum.Silence)
{
_audioStreamTimer = new Timer(SendSilenceSample, null, 0, AUDIO_SAMPLE_PERIOD_MILLISECONDS);
}
else if (sourceOptions.AudioSource == AudioSourcesEnum.PinkNoise ||
sourceOptions.AudioSource == AudioSourcesEnum.WhiteNoise ||
sourceOptions.AudioSource == AudioSourcesEnum.SineWave)
{
int sourceSampleRate = _sourceAudioSampleRate == AudioSamplingRatesEnum.Rate8KHz ? 8000 : 16000;
_signalGenerator = new SignalGenerator(sourceSampleRate, 1);
switch (sourceOptions.AudioSource)
{
case AudioSourcesEnum.PinkNoise:
_signalGenerator.Type = SignalGeneratorType.Pink;
break;
case AudioSourcesEnum.SineWave:
_signalGenerator.Type = SignalGeneratorType.Sin;
break;
case AudioSourcesEnum.WhiteNoise:
default:
_signalGenerator.Type = SignalGeneratorType.White;
break;
}
_audioStreamTimer = new Timer(SendSignalGeneratorSample, null, 0, AUDIO_SAMPLE_PERIOD_MILLISECONDS);
}
else if (sourceOptions.AudioSource == AudioSourcesEnum.Music)
{
if (string.IsNullOrWhiteSpace(sourceOptions.MusicFile) || !File.Exists(sourceOptions.MusicFile))
{
if (!string.IsNullOrWhiteSpace(sourceOptions.MusicFile))
{
Log.LogWarning($"Music file not set or not found, using default music resource.");
}
EmbeddedFileProvider efp = new EmbeddedFileProvider(Assembly.GetExecutingAssembly());
var audioStreamFileInfo = efp.GetFileInfo(MUSIC_RESOURCE_PATH);
_audioStreamReader = new StreamReader(audioStreamFileInfo.CreateReadStream());
}
else
{
_audioStreamReader = new StreamReader(sourceOptions.MusicFile);
}
_audioStreamTimer = new Timer(SendMusicSample, null, 0, AUDIO_SAMPLE_PERIOD_MILLISECONDS);
}
_audioOpts = sourceOptions;
}
}
