/// =======================================================================================================
public static byte[] CreateBlankWave(uint length_ms, WAVFormat fmt)
{
uint newdatasize = ConvertMsToNumberOfBytes(length_ms, new WAVFormat(fmt.NumberOfChannels, fmt.SampleRate, fmt.ByteDepth));
uint defaultheadersize = 44;
byte[] newdata = new byte[defaultheadersize + newdatasize];
int count = 0;
string text = "RIFF4567WAVEfmt 67890123456789012345data0123"; // number stubs are replaced below
foreach (char c in text)
{
newdata[count] = Convert.ToByte(c);
count++;
}
Serialise(ref newdata, 4, newdata.Length - 4, 4); // RIFF chunk size
Serialise(ref newdata, 16, 16, 4); // fmt chunk size - PCM i.e. no extra parameters
Serialise(ref newdata, 20, 1, 2); // audio format - no compression
Serialise(ref newdata, 22, (int)fmt.NumberOfChannels, 2); // number of channels
Serialise(ref newdata, 24, (int)fmt.SampleRate, 4); // sample rate
Serialise(ref newdata, 28, (int)(fmt.SampleRate * fmt.NumberOfChannels * fmt.ByteDepth), 4); // byte rate
Serialise(ref newdata, 32, (int)(fmt.NumberOfChannels * fmt.ByteDepth), 2); // bytes per sample
Serialise(ref newdata, 34, 24, 2); // bit depth
Serialise(ref newdata, 40, (int)newdatasize, 4); // data length
return(newdata);
}
public static API.Return WAV_GRAPH(string path, string start_ms, string end_ms, string timebase_ms)
{
int reduction = 10; // Note this is adequate for reporting and fourier transforms
path = API.DISK.AutoAddExt(path, ".wav");
List <CATMessage> cm = new List <CATMessage>();
if (File.Exists(path))
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
int startofdata = GetStartOfDataIndex(alldata);
uint start = 0;
uint end = fmt.Length;
uint timebasems = 1000;
try { start = string.IsNullOrWhiteSpace(start_ms) ? 0 : ConvertMsToNumberOfBytes(Convert.ToUInt32(start_ms), fmt); } catch (Exception e) { cm.Add(new CATMessage(CAT.ErrorMsg(e), CAT.Status.FAIL)); }
try { end = string.IsNullOrWhiteSpace(end_ms) ? fmt.Length : ConvertMsToNumberOfBytes((Convert.ToUInt32(end_ms)), fmt); } catch (Exception e) { cm.Add(new CATMessage(CAT.ErrorMsg(e), CAT.Status.FAIL)); }
try { timebasems = string.IsNullOrWhiteSpace(timebase_ms) ? 1000 : Convert.ToUInt32(Convert.ToDouble(timebase_ms)); } catch (Exception e) { cm.Add(new CATMessage(CAT.ErrorMsg(e), CAT.Status.FAIL)); }
cm.Add(new CATMessage("Start:" + ConvertNumberOfBytesToMs(start, fmt) + "ms End:" + ConvertNumberOfBytesToMs(end, fmt) + "ms Timebase:" + timebasems, CAT.Status.INFO));
byte[] newdata = new byte[end - start];
Array.Copy(alldata, startofdata + start, newdata, 0, end - start);
List <List <API.Xy> > timewaves = BytesToWave(newdata, fmt, reduction);
List <API.ChartData> allcharts = new List <API.ChartData> {
new API.ChartData(timewaves, new API.TimeData(timebasems), path)
};
return(new API.Return(allcharts, cm));
}
return(new Return(new CATMessage(path + " does not exist or has issues")));
}
/// =======================================================================================================
public static void WAV_MAKE(string length_ms,
string tone_path,
string tone_note,
string new_note,
string output_folder,
string decay_norm,
string number_of_channels,
string sample_rate,
string byte_depth)
{
WAVFormat fmt = new WAVFormat(number_of_channels, sample_rate, byte_depth);
uint length = Convert.ToUInt32(length_ms);
byte[] newdata = CreateBlankWave(length, fmt);
string[] alllines = File.ReadAllLines(tone_path);
double tone_frequency = GetFrequency(tone_note); // Relative base frequency
double new_frequency = GetFrequency(new_note);
double decay = string.IsNullOrWhiteSpace(decay_norm) ? 0.99999 : Convert.ToDouble(decay_norm);
foreach (string line in alllines)
{
string[] split = line.Split('\t');
AddFrequency(new_frequency * Convert.ToDouble(split[0]) / tone_frequency, ref newdata, fmt, Convert.ToDouble(split[1]), decay);
}
if (!Directory.Exists(output_folder))
{
Directory.CreateDirectory(output_folder);
}
File.WriteAllBytes(DISK.AutoIncrementFilename(output_folder + @"\" + new_note + ".wav"), newdata);
}
/// =======================================================================================================
public static string WAV_MIN_MAX(string path)
{
if (File.Exists(path))
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
int startofdata = GetStartOfDataIndex(alldata);
double max = 0;
double min = 0;
for (int i = startofdata; i < alldata.Length - startofdata; i += (int)fmt.ByteDepth)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double norm = Normalise(sample, (int)fmt.ByteDepth);
if (norm > max)
{
max = norm;
}
if (norm < min)
{
min = norm;
}
}
return(max.ToString() + " - " + min.ToString());
}
return("File not found");
}
/// =======================================================================================================
public static void WAV_CUT_ALL(string path, string start_offset_ms, string cut_size_ms, string shift_length_ms)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
uint startoffset = ConvertMsToNumberOfBytes(Convert.ToUInt32(start_offset_ms), fmt);
uint cutsize = ConvertMsToNumberOfBytes(Convert.ToUInt32(cut_size_ms), fmt);
uint shiftlength = ConvertMsToNumberOfBytes(Convert.ToUInt32(shift_length_ms), fmt);
int datasize;
int headersize = GetStartOfDataIndex(alldata, out datasize);
long newfilesize = cutsize + headersize;
long newdatasize = cutsize;
while (datasize > shiftlength && datasize > cutsize) // ensure reduced alldata is larger than cutsize and shiftlength
{
// Build newdata, as cutsize from startoffset
GetStartOfDataIndex(alldata, out datasize);
byte[] newdata = new byte[newfilesize];
Array.Copy(alldata, 0, newdata, 0, headersize); // copy header
SetDataSize(ref newdata, headersize, (int)newdatasize);
SetRiffSize(ref newdata, (int)newfilesize - 8);
Array.Copy(alldata, headersize + startoffset, newdata, headersize, newdatasize); // copy wave data
// Reduce alldata by shift length
byte[] bufdata = new byte[alldata.Length - shiftlength];
Array.Copy(alldata, 0, bufdata, 0, headersize); // copy header
Array.Copy(alldata, headersize + shiftlength, bufdata, headersize, bufdata.Length - headersize); // copy wave data from shiftlength
alldata = bufdata;
SetDataSize(ref alldata, headersize, bufdata.Length - headersize);
SetRiffSize(ref newdata, bufdata.Length - 8);
path = DISK.AutoIncrementFilename(path);
File.WriteAllBytes(DISK.AutoIncrementFilename(path), newdata);
}
}
/// =======================================================================================================
public static void WAV_TRIM(string path, string front_ms, string back_ms, string over_write)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
bool overwrite = Convert.ToBoolean(over_write);
uint front_trim_length = ConvertMsToNumberOfBytes(Convert.ToUInt32(front_ms), fmt);
uint back_trim_length = ConvertMsToNumberOfBytes(Convert.ToUInt32(back_ms), fmt);
int datasize;
int headersize = GetStartOfDataIndex(alldata, out datasize);
while (front_trim_length % fmt.ByteDepth != 0)
{
front_trim_length++;
}
long newfilesize = alldata.Length - front_trim_length - back_trim_length;
long newdatasize = datasize - front_trim_length - back_trim_length;
byte[] newdata = new byte[newfilesize];
Array.Copy(alldata, 0, newdata, 0, headersize); // copy header
SetDataSize(ref newdata, headersize, (int)newdatasize);
SetRiffSize(ref newdata, (int)newfilesize - 8);
Array.Copy(alldata, headersize + front_trim_length, newdata, headersize, newdatasize);
if (overwrite)
{
File.WriteAllBytes(path, newdata);
}
else
{
File.WriteAllBytes(DISK.AutoIncrementFilename(path), newdata);
}
}
/// =======================================================================================================
public static void WAV_STRETCH(string path, string factor)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
double sampletofactor = Convert.ToDouble(factor);
int startofdata = GetStartOfDataIndex(alldata);
uint newdatasize = (uint)((double)alldata.Length * sampletofactor);
long newfilesize = newdatasize + startofdata;
byte[] newdata = new byte[newdatasize];
Array.Copy(alldata, 0, newdata, 0, startofdata); // copy header
SetDataSize(ref newdata, startofdata, (int)newdatasize);
SetRiffSize(ref newdata, (int)newfilesize - 8);
for (int i = 0; i < newdatasize; i += (int)fmt.ByteDepth)
{
double newid = i / sampletofactor;
int ni = (int)Math.Round(newid);
int newi = ni / ((int)fmt.ByteDepth * 2);
newi = newi * ((int)fmt.ByteDepth * 2);
if (startofdata + newi < alldata.Length - 100)
{
int sample = Deserialise(alldata, startofdata + newi, (int)fmt.ByteDepth);
Serialise(ref newdata, i + startofdata, (int)sample, (int)fmt.ByteDepth);
}
}
File.WriteAllBytes(DISK.AutoIncrementFilename(path), newdata);
}
/// =======================================================================================================
public static void GetDoubleArrayFromBytes(byte[] alldata, out double[] left, out double[] right)
{
WAVFormat fmt = ReadFormat(alldata);
long sample_rate = fmt.NumberOfChannels * fmt.SampleRate;
int startofdata = GetStartOfDataIndex(alldata);
int arraylength = (alldata.Length - startofdata) / (int)(fmt.NumberOfChannels * fmt.ByteDepth);
left = new double[arraylength];
right = new double[arraylength];
int sample_count = 0;
for (int i = startofdata; i < alldata.Length - startofdata; i += (int)fmt.NumberOfChannels * (int)fmt.ByteDepth)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double norm_sample = Normalise(sample, (int)fmt.ByteDepth);
left[sample_count] = norm_sample;
if (fmt.NumberOfChannels == 2)
{
sample = Deserialise(alldata, i + (int)fmt.ByteDepth, (int)fmt.ByteDepth);
norm_sample = Normalise(sample, (int)fmt.ByteDepth);
right[sample_count] = norm_sample;
}
sample_count++;
}
}
/// =======================================================================================================
public static uint ConvertNumberOfBytesToMs(uint numberbytes, WAVFormat fmt)
{
// Many ulong casts required to ensure that there is no integer overflow
ulong temp = (ulong)((ulong)numberbytes * 1000 / ((ulong)fmt.NumberOfChannels * (ulong)fmt.SampleRate * (ulong)fmt.ByteDepth));
return((uint)temp);
}
// FEATURES
/// =======================================================================================================
public static void WAV_CUT(string path, string start_offset_ms, string cut_size_ms, string over_write)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
bool overwrite = Convert.ToBoolean(over_write);
uint startoffset = ConvertMsToNumberOfBytes(Convert.ToUInt32(start_offset_ms), fmt);
uint cutsize = ConvertMsToNumberOfBytes(Convert.ToUInt32(cut_size_ms), fmt);
int startofdata = GetStartOfDataIndex(alldata);
int newfilesize = (int)cutsize + startofdata;
int newdatasize = (int)cutsize;
byte[] newdata = new byte[newfilesize];
Array.Copy(alldata, 0, newdata, 0, startofdata); // copy header
SetDataSize(ref newdata, startofdata, newdatasize);
SetRiffSize(ref newdata, newfilesize - 8);
Array.Copy(alldata, startofdata + startoffset, newdata, startofdata, newdatasize);
if (overwrite)
{
File.WriteAllBytes(path, newdata);
}
else
{
File.WriteAllBytes(DISK.AutoIncrementFilename(path), newdata);
}
}
// TODO unused:
/// =======================================================================================================
public static List <API.Xy> GetWave(byte[] snippet, SterioChannel channel, WAVFormat fmt)
{
long sample_rate = fmt.NumberOfChannels * fmt.SampleRate;
List <API.Xy> wave = new List <API.Xy>();
int sample_count = 0;
int sample = 0;
double norm_sample = 0;
for (int i = 0; i < snippet.Length - (int)fmt.ByteDepth; i += (int)fmt.ByteDepth)
{
if (fmt.NumberOfChannels == 2)
{
if (sample_count % 2 == 0 && channel == SterioChannel.Left)
{
sample = Deserialise(snippet, i, (int)fmt.ByteDepth);
norm_sample = Normalise(sample, (int)fmt.ByteDepth);
wave.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
else
{
sample = Deserialise(snippet, i, (int)fmt.ByteDepth);
norm_sample = Normalise(sample, (int)fmt.ByteDepth);
wave.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
}
else
{
sample = Deserialise(snippet, i, (int)fmt.ByteDepth);
norm_sample = Normalise(sample, (int)fmt.ByteDepth);
wave.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
sample_count++;
}
return(wave);
}
// FEATURES
/// =======================================================================================================
public static Return READ_FMT(string path)
{
byte[] header = new byte[1024];
FileStream fs = new FileStream(path, FileMode.Open);
fs.Read(header, 0, header.Length);
fs.Close();
WAVFormat fmt = ReadFormat(header);
return(new Return("NumberofChannels:" + fmt.NumberOfChannels, "SampleRate:" + fmt.SampleRate, "ByteDepth:" + fmt.ByteDepth, "Length:" + ConvertNumberOfBytesToMs(fmt.Length, fmt) + "ms"));
}
/// =======================================================================================================
public static void WAV_VOL(string path, string vol_0_to_1)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
int startofdata = GetStartOfDataIndex(alldata);
for (int i = startofdata; i < alldata.Length - startofdata; i += (int)fmt.ByteDepth)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double temp = (double)sample * Convert.ToDouble(vol_0_to_1);
Serialise(ref alldata, i, (int)temp, (int)fmt.ByteDepth);
}
File.WriteAllBytes(DISK.AutoIncrementFilename(path), alldata);
}
// FEATURES
/// =======================================================================================================
public static void WAV_LP_FILTER(string path, string cut_off_hz, string start_ms, string end_ms)
{
byte[] alldata = File.ReadAllBytes(path);
double cutoff = Convert.ToDouble(cut_off_hz);
int startofdata = GetStartOfDataIndex(alldata);
WAVFormat fmt = ReadFormat(alldata);
uint total = (uint)(alldata.Length - startofdata) / (fmt.NumberOfChannels * fmt.ByteDepth);
uint start = 0;
try { start = ConvertMsToNumberOfBytes(Convert.ToUInt32(start_ms), fmt) / (fmt.NumberOfChannels * fmt.ByteDepth); } catch { }
uint end = total;
try { end = ConvertMsToNumberOfBytes(Convert.ToUInt32(end_ms), fmt) / (fmt.NumberOfChannels * fmt.ByteDepth); } catch { }
double[] left;
double[] right;
GetDoubleArrayFromBytes(alldata, out left, out right);
double[] leftsection = new double[end - start];
double[] rightsection = new double[end - start];
Array.Copy(left, start, leftsection, 0, leftsection.Length);
Array.Copy(right, start, rightsection, 0, rightsection.Length);
LPFilter.Butterworth(ref leftsection, fmt.SampleRate, cutoff);
LPFilter.Butterworth(ref rightsection, fmt.SampleRate, cutoff);
Array.Copy(leftsection, 0, left, start, leftsection.Length);
Array.Copy(rightsection, 0, right, start, rightsection.Length);
double[,] allsamples = new double[fmt.NumberOfChannels, left.Length];
for (int i = 0; i < fmt.NumberOfChannels; i++)
{
for (int j = 0; j < left.Length; j++)
{
if (i == 0)
{
allsamples[i, j] = left[j];
}
else
{
allsamples[i, j] = right[j];
}
}
}
byte[] data = GetBytesFromDoubleArray(allsamples, fmt);
Array.Copy(data, 0, alldata, startofdata, data.Length);
File.WriteAllBytes(DISK.AutoIncrementFilename(path), alldata);
}
/// =======================================================================================================
public static byte[] GetBytesFromDoubleArray(double[,] input_data, WAVFormat fmt)
{
byte[] data = new byte[input_data.GetLength(1) * fmt.ByteDepth * fmt.NumberOfChannels];
int count = 0;
for (int i = 0; i < input_data.GetLength(1); i++)
{
for (int j = 0; j < fmt.NumberOfChannels; j++)
{
Serialise(ref data, count, Denormalise(input_data[j, i], (int)fmt.ByteDepth), (int)fmt.ByteDepth);
count += (int)fmt.ByteDepth;
}
}
return(data);
}
// Utilities
/// =======================================================================================================
public static List <Section> GetActivatedSections(byte[] alldata, double activation_amplitude_norm, uint activation_duration_ms, uint activation_negative_offset_ms)
{
WAVFormat fmt = ReadFormat(alldata);
uint duration = WAV.ConvertMsToNumberOfBytes(activation_duration_ms, fmt);
int startofdata = GetStartOfDataIndex(alldata);
int newfilesize = alldata.Length;
List <Section> sections = new List <Section>();
int activator = 0;
bool activated = false;
double sectionstart = 0.0;
double sectionpeak = 0.0;
for (int i = startofdata; i < newfilesize - startofdata; i += (int)fmt.ByteDepth)
{
int sample = WAV.Deserialise(alldata, i, (int)fmt.ByteDepth);
double norm_sample = WAV.Normalise(sample, (int)fmt.ByteDepth);
if (Math.Abs(norm_sample) > activation_amplitude_norm)
{
activated = true;
if (activator == 0)
{
sectionstart = WAV.ConvertNumberOfBytesToMs((uint)i, fmt);
if (sectionstart > activation_negative_offset_ms)
{
sectionstart = sectionstart - activation_negative_offset_ms;
}
}
sectionpeak = norm_sample > sectionpeak ? norm_sample : sectionpeak;
activator = (int)duration;
}
else
{
if (activated && activator == 0)
{
uint sectionend = WAV.ConvertNumberOfBytesToMs((uint)i, fmt);
sections.Add(new Section(sectionstart, sectionend, sectionpeak));
sectionpeak = 0.0;
activated = false;
}
}
activator = activator - (int)fmt.ByteDepth <= 0 ? 0 : activator - (int)fmt.ByteDepth;
}
if (activated)
{
sections.Add(new Section(sectionstart, WAV.ConvertNumberOfBytesToMs((uint)(newfilesize - startofdata), fmt), sectionpeak));
}
return(sections);
}
/// =======================================================================================================
public static void WAV_SNIP(string path, string from_start_offset_ms, string from_end_offset_ms, string over_write)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
bool overwrite = Convert.ToBoolean(over_write);
uint start = Convert.ToUInt32(from_start_offset_ms);
uint end = Convert.ToUInt32(from_end_offset_ms);
if (overwrite)
{
File.WriteAllBytes(path, WavSnip(alldata, start, end));
}
else
{
File.WriteAllBytes(DISK.AutoIncrementFilename(path), WavSnip(alldata, start, end));
}
}
/// =======================================================================================================
public static List <List <API.Xy> > GetWaves(byte[] alldata)
{
WAVFormat fmt = ReadFormat(alldata);
long sample_rate = fmt.NumberOfChannels * fmt.SampleRate;
int startofdata = GetStartOfDataIndex(alldata);
List <API.Xy> left = new List <API.Xy>();
List <API.Xy> right = new List <API.Xy>();
int sample_count = 0;
for (int i = startofdata; i < alldata.Length - startofdata; i += (int)fmt.ByteDepth)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double norm_sample = Normalise(sample, (int)fmt.ByteDepth);
if (fmt.NumberOfChannels == 2)
{
if (sample_count % 2 == 0)
{
left.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
else
{
right.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
}
else
{
left.Add(new API.Xy((double)sample_count / (double)sample_rate, norm_sample));
}
sample_count++;
}
if (fmt.NumberOfChannels == 2)
{
return(new List <List <API.Xy> >()
{
left, right
});
}
else
{
return(new List <List <API.Xy> >()
{
left
});
}
}
// FEATURES
/// =======================================================================================================
public static API.Return WAV_FFT(string path, string max_frequency)
{
byte[] alldata = File.ReadAllBytes(path);
int max = string.IsNullOrWhiteSpace(max_frequency) ? 1000 : Convert.ToInt32(max_frequency);
WAVFormat fmt = ReadFormat(alldata);
List <List <API.Xy> > waves = GetWaves(alldata);
List <List <API.Xy> > frequency = null;
if (fmt.NumberOfChannels == 2)
{
frequency = GetWAVFFT(waves[0], waves[1], max);
}
else
{
frequency = GetWAVFFT(waves[0], null, max);
}
return(new API.Return(new API.ChartData(frequency, new API.FrequencyData(1), path)));
}
/// =======================================================================================================
public static void AddFrequency(double frequency, ref byte[] newdata, WAVFormat fmt, double vol, double decay)
{
double x = 0.0;
double newvol = 1000 * vol / frequency;
int startofdata = GetStartOfDataIndex(newdata);
double scroller = frequency * 2.0 * Math.PI / fmt.SampleRate;
double bitdepth = Math.Pow(2, (8 * fmt.ByteDepth));
int increment = (int)(fmt.NumberOfChannels * fmt.ByteDepth);
for (int i = startofdata; i < newdata.Length; i += increment)
{
int y = Deserialise(newdata, i, (int)fmt.ByteDepth);
y += (int)(newvol * bitdepth * Math.Sin(x));
Serialise(ref newdata, i, y, (int)fmt.ByteDepth);
x += scroller;
newvol = newvol * decay;
}
}
// FEATURES
/// =======================================================================================================
public static void WAV_FADE(string file_path, string front_ms, string back_ms, string over_write)
{
byte[] alldata = File.ReadAllBytes(file_path);
WAVFormat fmt = ReadFormat(alldata);
uint front_fade_length = ConvertMsToNumberOfBytes(Convert.ToUInt32(front_ms), fmt);
uint back_fade_length = ConvertMsToNumberOfBytes(Convert.ToUInt32(back_ms), fmt);
bool overwrite = string.IsNullOrWhiteSpace(over_write) ? false : Convert.ToBoolean(over_write);
int datasize;
int headersize = GetStartOfDataIndex(alldata, out datasize);
long endoffile = headersize + datasize;
double plusser = front_fade_length == 0 ? 1.0 : 0.0;
uint stepsize = fmt.ByteDepth;
for (int i = headersize; i < endoffile - stepsize; i += (int)stepsize)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
if (i < front_fade_length)
{
double temp = plusser * (double)sample;
plusser = plusser + ((double)stepsize / front_fade_length);
sample = (int)temp;
Serialise(ref alldata, i, sample, (int)fmt.ByteDepth);
}
else if (i > endoffile - back_fade_length)
{
double temp = plusser * (double)sample;
plusser = plusser - ((double)stepsize / back_fade_length);
sample = (int)temp;
Serialise(ref alldata, i, sample, (int)fmt.ByteDepth);
}
else if (i > front_fade_length)
{
plusser = 1.0;
}
}
if (overwrite)
{
File.WriteAllBytes(file_path, alldata);
}
else
{
File.WriteAllBytes(DISK.AutoIncrementFilename(file_path), alldata);
}
}
/// =======================================================================================================
public static void WAV_VOL_STERIO(string path, string vol_left_0_to_1, string vol_right_0_to_1)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
int startofdata = GetStartOfDataIndex(alldata);
bool alternator = true;
double volleft = Convert.ToDouble(vol_left_0_to_1);
double volright = Convert.ToDouble(vol_right_0_to_1);
for (int i = startofdata; i < alldata.Length - startofdata; i += (int)fmt.ByteDepth)
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double vol = alternator ? volleft : volright;
alternator = !alternator;
double temp = (double)sample * vol;
Serialise(ref alldata, i, (int)temp, (int)fmt.ByteDepth);
}
File.WriteAllBytes(DISK.AutoIncrementFilename(path), alldata);
}
// FEATURES
/// =======================================================================================================
public static void WAV_DFT(string path, string max_frequency, string activation_amplitude_norm)
{
byte[] alldata = File.ReadAllBytes(path);
int max = string.IsNullOrWhiteSpace(max_frequency) ? 1000 : Convert.ToInt32(max_frequency);
double amplitude = Convert.ToDouble(activation_amplitude_norm);
WAVFormat fmt = ReadFormat(alldata);
List <List <API.Xy> > waves = GetWaves(alldata);
List <List <API.Xy> > frequency = null;
if (fmt.NumberOfChannels == 2)
{
frequency = GetWAVDFT(waves[0], waves[1], max);
}
else
{
frequency = GetWAVDFT(waves[0], null, max);
}
API.Graph.Milliseconds(new API.ChartData(frequency, new API.FrequencyData(1), path), "DFT"); // TODO
}
/// =======================================================================================================
public static List <List <API.Xy> > BytesToWave(byte[] alldata, WAVFormat fmt, int reduction_factor = 10)
{
double sample_rate = fmt.NumberOfChannels * fmt.SampleRate / reduction_factor;
List <API.Xy> left = new List <API.Xy>();
List <API.Xy> right = new List <API.Xy>();
int sample_count = 0;
for (int i = 0; i < alldata.Length - (2 * fmt.ByteDepth * reduction_factor); i += ((int)fmt.ByteDepth * reduction_factor))
{
int sample = Deserialise(alldata, i, (int)fmt.ByteDepth);
double norm_sample = Normalise(sample, (int)fmt.ByteDepth);
if (fmt.NumberOfChannels == 2)
{
if (sample_count % 2 == 0)
{
left.Add(new API.Xy(sample_count / sample_rate, norm_sample));
}
else
{
right.Add(new API.Xy(sample_count / sample_rate, norm_sample));
}
}
else
{
left.Add(new API.Xy(sample_count / sample_rate, norm_sample));
}
sample_count++;
}
if (fmt.NumberOfChannels == 2)
{
return(new List <List <API.Xy> >()
{
left, right
});
}
else
{
return(new List <List <API.Xy> >()
{
left
});
}
}
/// =======================================================================================================
public static void WAV_STERIO_SWAP(string path)
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = ReadFormat(alldata);
if (fmt.NumberOfChannels == 2)
{
int startofdata = GetStartOfDataIndex(alldata);
for (int i = startofdata; i < alldata.Length - startofdata - fmt.ByteDepth; i += (int)fmt.ByteDepth * 2)
{
int sampleleft = Deserialise(alldata, i, (int)fmt.ByteDepth);
int sampleright = Deserialise(alldata, i + (int)fmt.ByteDepth, (int)fmt.ByteDepth);
int newleft = sampleright;
int newright = sampleleft;
Serialise(ref alldata, i, (int)newleft, (int)fmt.ByteDepth);
Serialise(ref alldata, i + (int)fmt.ByteDepth, (int)newright, (int)fmt.ByteDepth);
}
File.WriteAllBytes(DISK.AutoIncrementFilename(path), alldata);
}
}
/// =======================================================================================================
public static byte[] GetBytesFromWaves(List <List <API.Xy> > waves, WAVFormat fmt)
{
byte[] data = new byte[waves[0].Count * fmt.ByteDepth * fmt.NumberOfChannels];
int count = 0;
foreach (API.Xy sample in waves[0])
{
Serialise(ref data, count, Denormalise(sample.Y, (int)fmt.ByteDepth), (int)fmt.ByteDepth);
count += (int)fmt.ByteDepth * (int)fmt.NumberOfChannels;
}
if (fmt.NumberOfChannels == 2)
{
count = (int)fmt.ByteDepth;
foreach (API.Xy sample in waves[1])
{
Serialise(ref data, count, Denormalise(sample.Y, (int)fmt.ByteDepth), (int)fmt.ByteDepth);
count += (int)fmt.ByteDepth * (int)fmt.NumberOfChannels;
}
}
return(data);
}
/// =======================================================================================================
public static byte[] WavSnip(byte[] alldata, uint from_start_offset_ms, uint from_end_offset_ms)
{
WAVFormat fmt = ReadFormat(alldata);
uint startoffset = ConvertMsToNumberOfBytes(from_start_offset_ms, fmt);
while (startoffset % fmt.ByteDepth != 0)
{
startoffset++;
}
uint cutsize = ConvertMsToNumberOfBytes((from_end_offset_ms - from_start_offset_ms), fmt);
int startofdata = GetStartOfDataIndex(alldata);
long newfilesize = cutsize + startofdata;
long newdatasize = cutsize;
byte[] newdata = new byte[newfilesize];
Array.Copy(alldata, 0, newdata, 0, startofdata); // copy header
SetDataSize(ref newdata, startofdata, (int)newdatasize);
SetRiffSize(ref newdata, (int)newfilesize - 8);
Array.Copy(alldata, startofdata + startoffset, newdata, startofdata, newdatasize);
return(newdata);
}
// FEATURES
/// =======================================================================================================
public static void WAV_MAKE_ALL(string length_ms,
string tone_path,
string tone_note,
string output_folder,
string decay_norm,
string number_of_channels,
string sample_rate,
string byte_depth)
{
WAVFormat fmt = new WAVFormat(number_of_channels, sample_rate, byte_depth);
uint length = Convert.ToUInt32(length_ms);
string[] alltonelines = File.ReadAllLines(tone_path);
double tone_frequency = GetFrequency(tone_note); // Relative base frequency
double decay = string.IsNullOrWhiteSpace(decay_norm) ? 0.99999 : Convert.ToDouble(decay_norm);
for (int i = 1; i < 7; i++) // Above the 7th octave, the sound becomes too high pitched for music
{
foreach (KeyValuePair <string, double> note in Notes)
{
string new_note = note.Key + i;
string filename = DISK.AutoAddBaseDirectory(output_folder + "\\" + new_note + ".wav");
if (!File.Exists(filename))
{
byte[] newdata = CreateBlankWave(length, fmt);
double new_frequency = GetFrequency(new_note);
foreach (string line in alltonelines)
{
string[] split = line.Split('\t');
AddFrequency(new_frequency * Convert.ToDouble(split[0]) / tone_frequency, ref newdata, fmt, Convert.ToDouble(split[1]), decay);
}
if (!Directory.Exists(output_folder))
{
Directory.CreateDirectory(output_folder);
}
File.WriteAllBytes(filename, newdata);
}
}
}
}
// FEATURES
/// =======================================================================================================
public static void WAV_SHIFT_RIGHT(string path, string offset_ms) // This adds presence by offsetting right from left
{
byte[] alldata = File.ReadAllBytes(path);
WAVFormat fmt = new WAVFormat(1, 96000, 3); // Use the highest quality possible
uint offset = ConvertMsToNumberOfBytes(Convert.ToUInt32(offset_ms), fmt);
while (offset % fmt.ByteDepth != 0)
{
offset++;
}
int startofdata = GetStartOfDataIndex(alldata);
int datasize = (int)GetRiffSize(alldata) - startofdata;
byte[] newdata = CreateBlankWave(ConvertNumberOfBytesToMs((uint)datasize, fmt), fmt);
int newdatapos = 44;
for (int alldatapos = startofdata; alldatapos < alldata.Length - (int)fmt.ByteDepth - (2 * offset); alldatapos += (int)(fmt.NumberOfChannels * fmt.ByteDepth))
{
Serialise(ref newdata, newdatapos, Deserialise(alldata, alldatapos, (int)fmt.ByteDepth), (int)fmt.ByteDepth);
Serialise(ref newdata, newdatapos + (int)fmt.ByteDepth, Deserialise(alldata, alldatapos + (int)fmt.ByteDepth + (int)offset, (int)fmt.ByteDepth), (int)fmt.ByteDepth);
newdatapos += (int)(fmt.NumberOfChannels * fmt.ByteDepth);
}
File.WriteAllBytes(DISK.AutoIncrementFilename(path), newdata);
}
/// =======================================================================================================
public static void WAV_TONE(string path, string output_path, string activation_amplitude_norm)
{
byte[] alldata = File.ReadAllBytes(path);
double amplitude = Convert.ToDouble(activation_amplitude_norm) - 0.5;
WAVFormat fmt = ReadFormat(alldata);
List <List <Xy> > waves = GetWaves(alldata);
List <List <Xy> > fft = null;
if (fmt.NumberOfChannels == 2)
{
fft = GetWAVFFT(waves[0], waves[1], 3000);
}
else
{
fft = GetWAVFFT(waves[0], null, 3000);
}
string output_text = "";
foreach (Section section in WAV.GetActivatedFrequencies(fft, amplitude))
{
output_text += section.X1 + "\t" + (section.Peak + 0.5) + "\n";
}
File.WriteAllText(DISK.AutoIncrementFilename(output_path), output_text);
}
/// <summary>
/// Returns a WAVFormat struct containing audio format information
/// (# channels, sample rate, and bits per sample) for a WAV file.
/// </summary>
/// <param name="pFilename">The name of the file about which to retrieve format information</param>
/// <returns>A WAVFormat struct object containing the audio format information for the open file</returns>
public static WAVFormat GetAudioFormat(String pFilename)
{
WAVFormat format = new WAVFormat();
WAVFile audioFile = new WAVFile();
if (audioFile.Open(pFilename, WAVFileMode.READ) == "")
{
format.BitsPerSample = audioFile.mBitsPerSample;
format.NumChannels = audioFile.mNumChannels;
format.SampleRateHz = audioFile.mSampleRateHz;
audioFile.Close();
}
return (format);
}