public void Add(PCMBuffer buffer)
{
if (buffer.Channels != channels) throw new ArgumentException("Wrong number of channels");
int length = buffer.SampleLength;
int pos = 0;
if (last == null) AddSegment();
while (pos < length) {
for (int ch = 0; ch < channels; ch++) last.data[ch, samplesWritten] = buffer[ch, pos];
pos++;
samplesWritten++;
if (samplesWritten == segmentLength) {
AddSegment();
samplesWritten = 0;
}
}
}
public static PCMBuffer operator *(PCMBuffer pcm, double mult)
{
if (mult == 1.0) return pcm;
if (mult == 0.0) {
PCMBuffer zb = new PCMBuffer(pcm.sampleRate);
//double[] silence = new double[pcm.SampleLength];
foreach (double[] c in pcm.data) zb.data.Add(new double[pcm.SampleLength]);
return zb;
}
PCMBuffer b = new PCMBuffer(pcm.sampleRate);
foreach (double[] ch in pcm.data) {
List<double> nc = new List<double>();
for (int i = 0; i < ch.Length; i++) nc.Add(ch[i] * mult);
b.data.Add(nc.ToArray());
}
return pcm;
}
public PCMBuffer Delay(int samples)
{
double[] silence = new double[samples];
PCMBuffer b = new PCMBuffer(sampleRate);
b.data = new List<double[]>();
for (int c = 0; c < data.Count; c++) b.data.Add(silence.Concat(data[c]).ToArray());
b.pad();
return b;
}
public static PCMBuffer operator +(PCMBuffer left, PCMBuffer right)
{
int sampleRate = Math.Max(left.sampleRate, right.sampleRate);
if (sampleRate != -1 && left.sampleRate != right.sampleRate) throw new NotSupportedException("Sample rates unmatched");
int chdiff = Math.Abs(left.data.Count - right.data.Count);
if (chdiff == 0) {
List<List<double>> fdata = new List<List<double>>();
int length = 0;
int ch = left.data.Count;
for (int i = 0; i < ch; i++) {
fdata.Add(new List<double>());
if (left.data[i].Length > length) length = left.data[i].Length;
if (right.data[i].Length > length) length = right.data[i].Length;
}
for (int c = 0; c < ch; c++) {
double res = 0;
for (int i = 0; i < length; i++) {
if (left.data[c].Length > i) res += left.data[c][i];
if (right.data[c].Length > i) res += right.data[c][i];
fdata[c].Add(res);
}
}
PCMBuffer b = new PCMBuffer(sampleRate);
b.data = new List<double[]>();
foreach (List<double> cht in fdata) b.data.Add(cht.ToArray());
return b;
}
else if (left.data.Count < 3 && right.data.Count < 3) {
return (left.asStereo() + right.asStereo());
}
else {
throw new NotSupportedException("Addition of PCMBuffers of differing channel counts only supported for stereo+mono");
}
}
