private static Tuple<int, string> WavToFlacHelper(WAVReader audioSource, string targetFlacPath)
{
int sampleRate;
AudioBuffer buffer = new AudioBuffer(audioSource, 0x10000);
FlakeWriterSettings settings = new FlakeWriterSettings();
settings.PCM = audioSource.PCM;
FlakeWriter audioDestination = new FlakeWriter(targetFlacPath, settings);
while (audioSource.Read(buffer, -1) != 0)
{
audioDestination.Write(buffer);
}
sampleRate = settings.PCM.SampleRate;
audioDestination.Close();
audioSource.Close();
return new Tuple<int, string>(sampleRate, targetFlacPath);
}
public FlakeWriter(Stream IO, FlakeWriterSettings settings)
{
m_settings = settings;
//if (Settings.PCM.BitsPerSample != 16)
// throw new Exception("Bits per sample must be 16.");
//if (Settings.PCM.ChannelCount != 2)
// throw new Exception("ChannelCount must be 2.");
channels = Settings.PCM.ChannelCount;
// flake_validate_params
//_path = path;
if (IO == null)
{
throw new ArgumentNullException("IO");
}
_IO = IO;
samplesBuffer = new int[Flake.MAX_BLOCKSIZE * (channels == 2 ? 4 : channels)];
residualBuffer = new int[Flake.MAX_BLOCKSIZE * (channels == 2 ? 10 : channels + 1)];
windowBuffer = new float[Flake.MAX_BLOCKSIZE * 2 * lpc.MAX_LPC_WINDOWS];
windowScale = new double[lpc.MAX_LPC_WINDOWS];
var _compressionLevel = Settings.EncoderModeIndex;
eparams.flake_set_defaults(_compressionLevel);
crc8 = new Crc8();
frame = new FlacFrame(channels * 2);
}
public FlakeWriter(string path, Stream IO, FlakeWriterSettings settings)
{
m_settings = settings.Clone() as FlakeWriterSettings;
m_settings.Validate();
//if (Settings.PCM.BitsPerSample != 16)
// throw new Exception("Bits per sample must be 16.");
//if (Settings.PCM.ChannelCount != 2)
// throw new Exception("ChannelCount must be 2.");
channels = Settings.PCM.ChannelCount;
// flake_validate_params
_path = path;
_IO = IO;
samplesBuffer = new int[Flake.MAX_BLOCKSIZE * (channels == 2 ? 4 : channels)];
residualBuffer = new int[Flake.MAX_BLOCKSIZE * (channels == 2 ? 10 : channels + 1)];
windowBuffer = new float[Flake.MAX_BLOCKSIZE * 2 * lpc.MAX_LPC_WINDOWS];
windowScale = new double[lpc.MAX_LPC_WINDOWS];
eparams.flake_set_defaults(m_settings);
crc8 = new Crc8();
frame = new FlacFrame(channels * 2);
}
public FlakeWriter(string path, FlakeWriterSettings settings)
: this(path, null, settings)
{
}
public int flake_set_defaults(FlakeWriterSettings settings)
{
// default to level 7 params
window_function = WindowFunction.Flattop | WindowFunction.Tukey;
order_method = OrderMethod.Akaike;
stereo_method = StereoMethod.Evaluate;
window_method = WindowMethod.Evaluate;
block_time_ms = 105;
prediction_type = PredictionType.Search;
estimation_depth = 1;
variable_block_size = 0;
lpc_min_precision_search = 1;
lpc_max_precision_search = 1;
do_seektable = true;
development_mode = -1;
// differences from level 7
switch (settings.EncoderModeIndex)
{
case 0:
block_time_ms = 53;
prediction_type = PredictionType.Fixed;
stereo_method = StereoMethod.Independent;
break;
case 1:
prediction_type = PredictionType.Levinson;
stereo_method = StereoMethod.Independent;
window_function = WindowFunction.Bartlett;
break;
case 2:
stereo_method = StereoMethod.Independent;
window_function = WindowFunction.Bartlett;
break;
case 3:
stereo_method = StereoMethod.Estimate;
window_function = WindowFunction.Bartlett;
break;
case 4:
stereo_method = StereoMethod.Estimate;
window_function = WindowFunction.Bartlett;
break;
case 5:
stereo_method = StereoMethod.Estimate;
window_method = WindowMethod.Estimate;
break;
case 6:
stereo_method = StereoMethod.Estimate;
break;
case 7:
break;
case 8:
estimation_depth = 2;
lpc_min_precision_search = 0;
break;
case 9:
window_function = WindowFunction.Bartlett;
break;
case 10:
//lpc_max_precision_search = 2;
break;
case 11:
estimation_depth = 5;
//lpc_max_precision_search = 2;
variable_block_size = 4;
break;
}
return 0;
}