public void Setup(WWFlacRWCS.Metadata metaW, byte[] picture)
{
mDsfW = new WWDsfRW.WWDsfWriter();
mDsfW.EncodeInit(metaW);
if (picture != null)
{
mDsfW.EncodeSetPicture(picture);
}
// サンプルデータ置き場。
mSampleData = new SampleData1ch[metaW.channels];
for (int ch = 0; ch < metaW.channels; ++ch)
{
mSampleData[ch] = new SampleData1ch((metaW.totalSamples + 7) / 8);
}
// ノイズシェイピングフィルターmLoopFiltersを作る。
mLoopFilter.Design(FILTER_ORDER, metaW.channels);
if (FILTER_ORDER == 5)
{
mLoopFilter.SetDelayValues(
new double[] {
1.43681852625616E-06,
-9.4526383335642E-05,
-0.00124416475447812,
-0.00212062453327017,
0.0391562027012161,
}
);
}
}
private long FlacWriteConvertTo24bitPcm(double [] y, WWFlacRWCS.Metadata metaW, LargeArray <byte> pcmW, long posY)
{
var yPcm = ConvertToIntegerPcm(y, metaW.BytesPerSample);
pcmW.CopyFrom(yPcm, 0, posY, yPcm.Length);
posY += yPcm.Length;
return(posY);
}
public void Setup(WWFlacRWCS.Metadata metaW, byte[] picture)
{
mFlacW = new WWFlacRWCS.FlacRW();
mFlacW.EncodeInit(metaW);
if (picture != null)
{
mFlacW.EncodeSetPicture(picture);
}
}
// FLACからPCMのバイト列を取得し、最大値1のdouble型のサンプル値の配列を作る。
private double[] InputSamples(WWFlacRWCS.FlacRW flacR, WWFlacRWCS.Metadata meta,
int ch, long posSamples, int nSamples)
{
// 1ch分のnサンプルのPCMデータ。
int nBytes = nSamples * meta.BytesPerSample;
var pcm = new byte[nBytes];
nSamples = flacR.GetPcmOfChannel(ch, posSamples, ref pcm, nSamples);
if (nSamples <= 0)
{
return(new double[0]);
}
double[] result = new double[nSamples];
switch (meta.bitsPerSample)
{
case 16:
for (int i = 0; i < nSamples; ++i)
{
short v = (short)(pcm[i * 2] + (pcm[i * 2 + 1] << 8));
result[i] = v / 32768.0;
}
break;
case 20:
case 24:
for (int i = 0; i < nSamples; ++i)
{
int v = (int)((pcm[i * 3] << 8) + (pcm[i * 3 + 1] << 16) + (pcm[i * 3 + 2] << 24));
result[i] = v / 2147483648.0;
}
break;
default:
throw new NotSupportedException();
}
return(result);
}
public int EncodeInit(WWFlacRWCS.Metadata meta)
{
mMeta = meta;
mDsdData = new List<byte[]>();
return 0;
}
public void EncodeEnd()
{
mDsdData = null;
mPictureData = null;
mMeta = null;
}
public RunWorkerCompletedResult BackgroundDoWorkImpl(DoWorkEventArgs e, string rootPath, bool background)
{
mContentList.Clear();
var result = new RunWorkerCompletedResult();
result.fileCount = 0;
result.path = rootPath;
if (background)
{
mBw.ReportProgress(0, new ReportProgressArgs(string.Format(Properties.Resources.LogCountingFiles, rootPath)));
}
var flacList = WWUtil.DirectoryUtil.CollectFilesOnFolder(rootPath, ".FLAC");
if (background)
{
mBw.ReportProgress(0, new ReportProgressArgs(string.Format(Properties.Resources.LogReportCount, flacList.Length)));
}
if (mBw.CancellationPending)
{
Console.WriteLine("D: BackgroundContentListBuilder::BackgroundDoWorkImpl() canceled 1");
e.Cancel = true;
return(result);
}
int finished = 0;
mStopWatch.Start();
// Parallel.Forにした時はforの中に持っていく必要あり。
if (background)
{
System.Threading.Thread.CurrentThread.Priority = System.Threading.ThreadPriority.Lowest;
}
try {
for (int i = 0; i < flacList.Length; ++i)
{
if (mBw.CancellationPending)
{
Console.WriteLine("D: BackgroundContentListBuilder::BackgroundDoWorkImpl() canceled 2");
e.Cancel = true;
return(result);
}
string path = flacList[i];
var flacrw = new WWFlacRWCS.FlacRW();
int ercd = flacrw.DecodeHeader(path);
lock (mBw) {
if (0 <= ercd)
{
++result.fileCount;
var m = new WWFlacRWCS.Metadata();
flacrw.GetDecodedMetadata(out m);
var pic = new byte[0];
if (0 < m.pictureBytes)
{
pic = new byte[m.pictureBytes];
flacrw.GetDecodedPicture(out pic, m.pictureBytes);
}
mContentList.Add(path, m.titleStr, 1, m.albumStr, m.artistStr, pic,
m.channels, m.bitsPerSample, m.sampleRate, m.PcmBytes / (m.channels * m.bitsPerSample / 8));
}
else
{
Console.WriteLine("FLAC decode failed {0} {1}", WWFlacRWCS.FlacRW.ErrorCodeToStr(ercd), path);
}
flacrw.DecodeEnd();
++finished;
if (1000 < mStopWatch.ElapsedMilliseconds)
{
if (background)
{
var text = string.Format(Properties.Resources.LogCreatingMusicList,
100 * finished / flacList.Length);
mBw.ReportProgress((int)(1000000L * finished / flacList.Length),
new ReportProgressArgs(text));
}
mStopWatch.Restart();
}
}
}
} catch (System.IO.IOException ex) {
//Console.WriteLine(ex);
} catch (System.Exception ex) {
Console.WriteLine(ex);
}
mStopWatch.Stop();
return(result);
}
public void EncodeEnd()
{
mSdmData = null;
mPictureData = null;
mMeta = null;
}
public int EncodeInit(WWFlacRWCS.Metadata meta)
{
mMeta = meta;
mSdmData = new List <WWUtil.LargeArray <byte> >();
return(0);
}
public int EncodeInit(WWFlacRWCS.Metadata meta)
{
mMeta = meta;
mDsdData = new List <byte[]>();
return(0);
}
public BWCompletedParam DoWork(BWStartParams param, ProgressReportDelegate ReportProgress)
{
int rv = 0;
var flacR = new WWFlacRWCS.FlacRW();
do
{
// FLACファイルからメタデータ、画像、音声を取り出す。
WWFlacRWCS.Metadata metaR;
rv = flacR.DecodeAll(param.inputFile);
if (rv < 0)
{
// do-whileを抜けたところでflacR.DecodeEndする。
break;
}
flacR.GetDecodedMetadata(out metaR);
byte[] picture = null;
if (0 < metaR.pictureBytes)
{
rv = flacR.GetDecodedPicture(out picture, metaR.pictureBytes);
if (rv < 0)
{
// do-whileを抜けたところでflacR.DecodeEndする。
break;
}
}
// flacRはまだ使用するのでここではDecodeEndしない。
long lcm = WWMath.Functions.LCM(metaR.sampleRate, param.targetSampleRate);
int upsampleScale = (int)(lcm / metaR.sampleRate);
int downsampleScale = (int)(lcm / param.targetSampleRate);
// IIRフィルターを設計。
// ストップバンド最小周波数fs。
double fs = metaR.sampleRate / 2 * STOPBAND_FREQ_RATIO;
if (param.targetSampleRate / 2 * STOPBAND_FREQ_RATIO < fs)
{
fs = param.targetSampleRate / 2 * STOPBAND_FREQ_RATIO;
}
// カットオフ周波数fc。
double fc = CUTOFF_STOPBAND_RATIO * fs;
mIIRFilterDesign = new IIRFilterDesign();
mIIRFilterDesign.Design(fc, fs, lcm, param.method);
ReportProgress(CONVERT_START_PERCENT, new BWProgressParam(State.FilterDesigned,
string.Format("Read FLAC completed.\nSource sample rate = {0}kHz.\nTarget sample rate = {1}kHz. ratio={2}/{3}\n",
metaR.sampleRate / 1000.0, param.targetSampleRate / 1000.0,
lcm / metaR.sampleRate, lcm / param.targetSampleRate)));
double RESAMPLE_RATIO = param.targetSampleRate / metaR.sampleRate;
mSw.Restart();
// 書き込み準備。
WWFlacRWCS.Metadata metaW = new WWFlacRWCS.Metadata(metaR);
metaW.sampleRate = param.targetSampleRate;
metaW.pictureBytes = metaR.pictureBytes;
metaW.bitsPerSample = 24;
metaW.totalSamples = metaR.totalSamples * upsampleScale / downsampleScale;
if (param.isTargetPcm)
{
mFlacWrite = new FlacWrite();
mFlacWrite.Setup(metaW, picture);
}
else
{
mDsfWrite = new DsfWrite();
mDsfWrite.Setup(metaW, picture);
}
var stat = new SampleValueStatistics();
long totalSamplesOfAllChannels = metaR.totalSamples * metaR.channels;
long processedSamples = 0;
// Mathematica用の設定。
WWComplex.imaginaryUnit = "I";
// 変換する
for (int ch = 0; ch < metaR.channels; ++ch)
{
//Parallel.For(0, metaR.channels, (int ch) => {
var pcmW = new WWUtil.LargeArray <byte>(metaW.totalSamples * metaW.BytesPerSample);
#if USE_ZOH_UPSAMPLE
// 零次ホールドのハイ落ち補償フィルター。
# if USE_CPP
var zohCompensation = new WWFilterCpp();
zohCompensation.BuildZohCompensation();
# else
var zohCompensation = new WWIIRFilterDesign.ZohNosdacCompensation(33);
# endif