//private async Task MixAudioTracks()
//{
// var audioTrackShortList = new List<short[]>();
// foreach (var audioTrack in audioTracks)
// {
// var audioTrackShort = new short[(int)Math.Ceiling((double)audioTrack.Length / 2)];
// Buffer.BlockCopy(audioTrack, 0, audioTrackShort, 0, audioTrack.Length);
// audioTrackShortList.Add(audioTrackShort);
// }
// var output = new short[audioTrackShortList.Max(x => x.Length)];
// for (int i = 0; i < output.Length; i++)
// {
// float mixed = MixTracks(audioTrackShortList, i);
// // reduce the volume a bit:
// // mixed *= (float)0.8;
// // hard clipping
// if (mixed > 1.0f) mixed = 1.0f;
// if (mixed < -1.0f) mixed = -1.0f;
// short outputSample = (short)(mixed * 32768.0f);
// output[i] = outputSample;
// }
// await PlayAudioTrack(output);
//}
//private float MixTracks(List<short[]> audioTrackShortList, int i)
//{
// float mixed = 0;
// foreach (var audioTrack in audioTrackShortList)
// {
// if (i < audioTrack.Length)
// {
// mixed += (audioTrack[i] / 32768.0f);
// }
// }
// return mixed;
//}
async Task PlaybackButton_Click()
{
if (memoryStream.Length > 0)
{
var audioArray = memoryStream.ToArray();
await _audioPlayback.PlayAudioTrack(audioArray);
}
}
public async Task MixAudioTracks(List <byte[]> audioTracks)
{
var audioTrackShortList = new List <short[]>();
foreach (var audioTrack in audioTracks)
{
var audioTrackShort = new short[(int)Math.Ceiling((double)audioTrack.Length / 2)];
Buffer.BlockCopy(audioTrack, 0, audioTrackShort, 0, audioTrack.Length);
audioTrackShortList.Add(audioTrackShort);
}
var output = new short[audioTrackShortList.Max(x => x.Length)];
for (int i = 0; i < output.Length; i++)
{
float mixed = MixTracks(audioTrackShortList, i);
// reduce the volume a bit:
// mixed *= (float)0.8;
// hard clipping
if (mixed > 1.0f)
{
mixed = 1.0f;
}
if (mixed < -1.0f)
{
mixed = -1.0f;
}
short outputSample = (short)(mixed * 32768.0f);
output[i] = outputSample;
}
await _audioPlayback.PlayAudioTrack(output);
}
