private void UpdateMatrix(int index)
{
double dhandle;
this.FPinHandles[index].GetValue(0, out dhandle);
ChannelInfo info = this.manager.GetChannel(Convert.ToInt32(dhandle));
if (info != null)
{
int mixerhandle = 0;
if (info.BassHandle.HasValue)
{
mixerhandle = BassMix.BASS_Mixer_ChannelGetMixer(info.BassHandle.Value);
}
if (mixerhandle != 0)
{
BASS_CHANNELINFO MIXER = Bass.BASS_ChannelGetInfo(mixerhandle);
BASS_CHANNELINFO CHANNEL = Bass.BASS_ChannelGetInfo(info.BassHandle.Value);
float[,] matrix = new float[MIXER.chans, CHANNEL.chans];
BassMix.BASS_Mixer_ChannelGetMatrix(info.BassHandle.Value, matrix);
int idx = 0;
for (int i = 0; i < MIXER.chans; i++)
{
for (int j = 0; j < CHANNEL.chans; j++)
{
double level;
this.FPinLevels[index].GetValue(idx, out level);
matrix[i, j] = (float)level;
idx++;
if (idx == this.FPinLevels[index].SliceCount)
{
idx = 0;
}
}
}
BassMix.BASS_Mixer_ChannelSetMatrix(info.BassHandle.Value, matrix);
}
}
}
private void buttonPlaySource_Click(object sender, System.EventArgs e)
{
Bass.BASS_StreamFree(_streamA);
Bass.BASS_StreamFree(_streamB);
Bass.BASS_StreamFree(_mixerStream);
// mixer setup
// now we need some channels to plug them in...create two decoding sources
_streamA = Bass.BASS_StreamCreateFile(_fileName, 0, 0, BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_SAMPLE_FLOAT);
_streamB = Bass.BASS_StreamCreateFile(_fileNameOutput, 0, 0, BASSFlag.BASS_STREAM_DECODE | BASSFlag.BASS_SAMPLE_FLOAT);
BASS_CHANNELINFO i = new BASS_CHANNELINFO();
Bass.BASS_ChannelGetInfo(_streamA, i);
// this will be the final mixer output stream being played
_mixerStream = BassMix.BASS_Mixer_StreamCreate(i.freq, 4, BASSFlag.BASS_DEFAULT);
// finally we plug them into the mixer (and upmix it to 4 channels - we assume the source to be stereo)
bool okA = BassMix.BASS_Mixer_StreamAddChannel(_mixerStream, _streamA, BASSFlag.BASS_MIXER_MATRIX | BASSFlag.BASS_STREAM_AUTOFREE);
bool okB = BassMix.BASS_Mixer_StreamAddChannel(_mixerStream, _streamB, BASSFlag.BASS_STREAM_AUTOFREE);
// a matrix for A!
float[,] matrixA = new float[4, 2] { // stereo to quad matrix
{ 1, 0 }, // left front out = left in
{ 0, 1 }, // right front out = right in
{ 1, 0 }, // left rear out = left in
{ 0, 1 } // right rear out = right in
};
// apply the matrix to stream A only
BassMix.BASS_Mixer_ChannelSetMatrix(_streamA, matrixA);
// just so show how to get it back...
float[,] matrixGet = new float[4, 2];
BassMix.BASS_Mixer_ChannelGetMatrix(_streamA, matrixGet);
// mute streamB at the beginning
this.trackBarCrossFader.Value = -100;
Bass.BASS_ChannelSetAttribute(_streamB, BASSAttribute.BASS_ATTRIB_VOL, 0f);
// and play it...
if (Bass.BASS_ChannelPlay(_mixerStream, false))
{
this.label1.Text = "Playing! Use the crossfader...";
}
}
