public static int ReadWavFile(string path, out AudioData ad)
{
ad = new AudioData();
using (var br = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read))) {
var reader = new WavRWLib2.WavReader();
if (!reader.ReadHeaderAndSamples(br, 0, -1))
{
MessageBox.Show(
string.Format("Error: Failed to read WAV file: {0}", path));
return(-1);
}
ad.meta = new WWFlacRWCS.Metadata();
ad.meta.albumStr = reader.AlbumName;
ad.meta.artistStr = reader.ArtistName;
ad.meta.titleStr = reader.Title;
ad.meta.pictureBytes = reader.PictureBytes;
ad.picture = reader.PictureData;
ad.meta.totalSamples = reader.NumFrames;
ad.meta.channels = reader.NumChannels;
ad.meta.sampleRate = reader.SampleRate;
var interleaved = reader.GetSampleLargeArray();
int bytesPerSample = reader.BitsPerSample / 8;
ad.pcm = new List <AudioDataPerChannel>();
for (int ch = 0; ch < reader.NumChannels; ++ch)
{
var pcmOneChannel = new WWUtil.LargeArray <byte>(reader.NumFrames * bytesPerSample);
for (long i = 0; i < reader.NumFrames; ++i)
{
for (int b = 0; b < reader.BitsPerSample / 8; ++b)
{
pcmOneChannel.Set(bytesPerSample * i + b,
interleaved.At(bytesPerSample * (reader.NumChannels * i + ch) + b));
}
}
#if true
var adp = new AudioDataPerChannel();
adp.mData = pcmOneChannel;
adp.mOffsBytes = 0;
adp.mBitsPerSample = reader.BitsPerSample;
adp.mValueRepresentationType = reader.SampleValueRepresentationType;
#else
var pcm32 = PcmDataLib.PcmDataUtil.ConvertTo32bitInt(reader.BitsPerSample, reader.NumFrames,
reader.SampleValueRepresentationType, pcmOneChannel);
var adp = new AudioDataPerChannel();
adp.mData = pcm32;
adp.mOffsBytes = 0;
adp.mBitsPerSample = 32;
adp.mValueRepresentationType = PcmDataLib.PcmData.ValueRepresentationType.SInt;
#endif
adp.mTotalSamples = ad.meta.totalSamples;
ad.pcm.Add(adp);
}
ad.meta.bitsPerSample = reader.BitsPerSample;
ad.preferredSaveFormat = WWAFUtil.FileFormatType.FLAC;
if (24 < ad.meta.bitsPerSample)
{
ad.preferredSaveFormat = WWAFUtil.FileFormatType.WAVE;
}
return(0);
}
}
public static int WriteWavFile(ref AudioData ad, string path)
{
int rv = 0;
int audioFormat = ValueRepresentationToAudioFormat(ad.writeValueRepresentation);
using (var bw = new BinaryWriter(File.Open(path, FileMode.Create, FileAccess.Write, FileShare.Write))) {
bool bRf64 = (2000 * 1000 * 1000 < ad.meta.PcmBytes);
if (bRf64)
{
// RF64形式で保存する。
WavRWLib2.WavWriter.WriteRF64Header(bw, ad.meta.channels, ad.meta.bitsPerSample, audioFormat, ad.meta.sampleRate, ad.meta.totalSamples);
int padBytes = ((ad.meta.PcmBytes & 1) == 1) ? 1 : 0;
int bytesPerSample = ad.meta.bitsPerSample / 8;
var buff = new byte[bytesPerSample];
for (long i = 0; i < ad.meta.totalSamples; ++i)
{
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
var from = ad.pcm[ch].mData;
for (int b = 0; b < bytesPerSample; ++b)
{
buff[b] = from.At(i * bytesPerSample + b);
}
bw.Write(buff);
}
}
if (1 == padBytes)
{
// チャンクの終わりが偶数になるようにパッドを入れる。
byte zero = 0;
bw.Write(zero);
}
}
else
{
var sampleArray = new byte[ad.meta.PcmBytes];
int bytesPerSample = ad.meta.bitsPerSample / 8;
int toPos = 0;
for (int i = 0; i < ad.meta.totalSamples; ++i)
{
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
var from = ad.pcm[ch].mData;
for (int b = 0; b < bytesPerSample; ++b)
{
sampleArray[toPos++] = from.At(i * bytesPerSample + b);
}
}
}
WavRWLib2.WavWriter.Write(bw, ad.meta.channels, ad.meta.bitsPerSample, audioFormat,
ad.meta.sampleRate, ad.meta.totalSamples, sampleArray);
}
}
return(rv);
}
public static int ReadDsfFile(string path, out AudioData ad)
{
ad = new AudioData();
using (var br = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read))) {
var reader = new WWDsfRW.WWDsfReader();
PcmDataLib.PcmData header;
var readResult = reader.ReadHeader(br, out header);
if (readResult != WWDsfRW.WWDsfReader.ResultType.Success)
{
MessageBox.Show(string.Format("Error: Failed to read DSF file: {0} {1}", path, readResult));
return(-1);
}
// DoP DSDデータとしての形式が出てくる。
ad.meta = new WWFlacRWCS.Metadata();
ad.meta.albumStr = reader.AlbumName;
ad.meta.artistStr = reader.ArtistName;
ad.meta.titleStr = reader.TitleName;
ad.meta.pictureBytes = reader.PictureBytes;
ad.picture = reader.PictureData;
ad.meta.totalSamples = reader.OutputFrames; // PCMのフレーム数が出る。
ad.meta.channels = reader.NumChannels;
ad.meta.sampleRate = reader.SampleRate; // DSDレートが出る。
}
using (var br = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read))) {
var reader = new WWDsfRW.WWDsfReader();
PcmDataLib.PcmData pcm;
reader.ReadStreamBegin(br, out pcm);
var sampleData = new WWUtil.LargeArray <byte> [ad.meta.channels];
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
// 24bit == 3bytes per channelのDoPから
// 16bitを抽出するので、１サンプルあたり２バイト。
sampleData[ch] = new WWUtil.LargeArray <byte>(ad.meta.totalSamples * 2);
}
const int FRAGMENT_SAMPLES = 1048576;
// 1チャンネル、1サンプルあたり２バイト入っている。
for (long sample = 0; sample < ad.meta.totalSamples; sample += FRAGMENT_SAMPLES)
{
// DoPのフレームが出てくる。リトルエンディアン、３バイトのうち下位２バイトがDSDデータ。
int fragmentSamples = FRAGMENT_SAMPLES;
if (ad.meta.totalSamples < sample + FRAGMENT_SAMPLES)
{
fragmentSamples = (int)(ad.meta.totalSamples - sample);
}
var buff = reader.ReadStreamReadOne(br, fragmentSamples);
// ここで全チャンネルがインターリーブされた、１サンプル３バイトのデータが出てくる。
// 3バイト目はマーカーバイト。
for (int i = 0; i < fragmentSamples; ++i)
{
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
// DoPデータはデータがビッグエンディアン詰めされている。
// ここでバイトオーダーを入れ替えて、1バイトごとに読めば順にデータが出てくるようにする。
// 1バイト内のビットの並びはMSBから古い順にデータが詰まっている。
sampleData[ch].Set((sample + i) * 2 + 0, buff[(ad.meta.channels * i + ch) * 3 + 1]);
sampleData[ch].Set((sample + i) * 2 + 1, buff[(ad.meta.channels * i + ch) * 3 + 0]);
}
}
}
// DSDデータとして書き込む。
ad.meta.totalSamples *= 16;
ad.meta.bitsPerSample = 1;
ad.preferredSaveFormat = WWAFUtil.FileFormatType.DSF;
ad.pcm = new List <AudioDataPerChannel>();
// AudioDataPerChannelには本当のサンプル数、量子化ビット数をセットする。
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
var adp = new AudioDataPerChannel();
adp.mData = sampleData[ch];
adp.mOffsBytes = 0;
adp.mBitsPerSample = 1;
adp.mValueRepresentationType = PcmDataLib.PcmData.ValueRepresentationType.SInt;
adp.mTotalSamples = ad.meta.totalSamples;
adp.mDataFormat = AudioDataPerChannel.DataFormat.Sdm1bit;
ad.pcm.Add(adp);
}
}
return(0);
}
public static int ReadFlacFile(string path, out AudioData ad)
{
ad = new AudioData();
var flac = new WWFlacRWCS.FlacRW();
int rv = flac.DecodeAll(path);
if (rv < 0)
{
MessageBox.Show(
string.Format("Error: Failed to read FLAC file: {0}", path));
return(rv);
}
rv = flac.GetDecodedMetadata(out ad.meta);
if (rv < 0)
{
return(rv);
}
rv = flac.GetDecodedPicture(out ad.picture, ad.meta.pictureBytes);
if (rv < 0)
{
return(rv);
}
// ad.pcmにPCMデータを入れる。
int bpf = ad.meta.BytesPerFrame;
int bps = ad.meta.BytesPerSample;
int fragmentSamples = 4096;
int fragmentBytes = fragmentSamples * bps;
var fragment = new byte[fragmentBytes];
ad.pcm = new List <AudioDataPerChannel>();
for (int ch = 0; ch < ad.meta.channels; ++ch)
{
// ■■■ 1チャンネル分のpcmを取り出す。■■■
long oneChannelPcmBytes = ad.meta.totalSamples * bps;
var pcm = new WWUtil.LargeArray <byte>(oneChannelPcmBytes);
for (long posS = 0; posS < ad.meta.totalSamples;)
{
// copySamples : コピーするサンプル数を決定する。
int copySamples = fragmentSamples;
if (ad.meta.totalSamples < posS + fragmentSamples)
{
copySamples = (int)(ad.meta.totalSamples - posS);
}
copySamples = flac.GetPcmOfChannel(ch, posS, ref fragment, copySamples);
if (copySamples < 0)
{
return(copySamples);
}
// fragmentに入っているPCMデータのサイズはcopySamples * bpsバイト。
pcm.CopyFrom(fragment, 0, posS * bps, copySamples * bps);
posS += copySamples;
}
var pcm24 = PcmDataLib.PcmDataUtil.ConvertTo24bit(ad.meta.bitsPerSample,
ad.meta.totalSamples, PcmDataLib.PcmData.ValueRepresentationType.SInt, pcm);
var adp = new AudioDataPerChannel();
adp.mDataFormat = AudioDataPerChannel.DataFormat.Pcm;
adp.mData = pcm24;
adp.mOffsBytes = 0;
adp.mBitsPerSample = 24;
adp.mValueRepresentationType = PcmDataLib.PcmData.ValueRepresentationType.SInt;
adp.mTotalSamples = ad.meta.totalSamples;
ad.pcm.Add(adp);
}
// converted to 24bit
ad.meta.bitsPerSample = 24;
ad.preferredSaveFormat = WWAFUtil.FileFormatType.FLAC;
flac.DecodeEnd();
return(0);
}
private int SetupResultPcm(AudioData from, List <FilterBase> filters, out AudioData to,
WWAFUtil.FileFormatType toFileFormat, WWAFUtil.AFSampleFormat toSampleFormat)
{
to = new AudioData();
to.preferredSaveFormat = toFileFormat;
var fmt = FilterSetup(from, 0, filters);
if (null == fmt)
{
return(-1);
}
to.meta = new WWFlacRWCS.Metadata(from.meta);
to.meta.sampleRate = fmt.SampleRate;
to.meta.totalSamples = fmt.NumSamples;
to.meta.channels = fmt.NumChannels;
to.writeValueRepresentation = PcmDataLib.PcmData.ValueRepresentationType.SInt;
switch (toSampleFormat)
{
case WWAFUtil.AFSampleFormat.Auto:
// auto selection.
switch (toFileFormat)
{
case WWAFUtil.FileFormatType.FLAC:
to.meta.bitsPerSample = 24;
break;
case WWAFUtil.FileFormatType.WAVE:
to.meta.bitsPerSample = 32;
break;
case WWAFUtil.FileFormatType.DSF:
to.meta.bitsPerSample = 1;
break;
}
break;
case WWAFUtil.AFSampleFormat.PcmInt16:
to.meta.bitsPerSample = 16;
break;
case WWAFUtil.AFSampleFormat.PcmInt24:
to.meta.bitsPerSample = 24;
break;
case WWAFUtil.AFSampleFormat.PcmInt32:
to.meta.bitsPerSample = 32;
break;
case WWAFUtil.AFSampleFormat.PcmFloat32:
to.meta.bitsPerSample = 32;
to.writeValueRepresentation = PcmDataLib.PcmData.ValueRepresentationType.SFloat;
break;
case WWAFUtil.AFSampleFormat.PcmInt64:
to.meta.bitsPerSample = 64;
break;
case WWAFUtil.AFSampleFormat.PcmFloat64:
to.meta.bitsPerSample = 64;
to.writeValueRepresentation = PcmDataLib.PcmData.ValueRepresentationType.SFloat;
break;
}
if (from.picture != null)
{
to.picture = new byte[from.picture.Length];
System.Array.Copy(from.picture, to.picture, to.picture.Length);
}
// allocate "to" pcm data
to.pcm = new List <AudioDataPerChannel>();
for (int ch = 0; ch < to.meta.channels; ++ch)
{
WWUtil.LargeArray <byte> data;
// set silent sample values to output buffer
switch (toFileFormat)
{
case WWAFUtil.FileFormatType.DSF:
data = new WWUtil.LargeArray <byte>((to.meta.totalSamples + 7) / 8);
for (long i = 0; i < data.LongLength; ++i)
{
data.Set(i, 0x69);
}
break;
case WWAFUtil.FileFormatType.FLAC:
if (655350 < to.meta.sampleRate)
{
return((int)WWFlacRWCS.FlacErrorCode.InvalidSampleRate);
}
data = new WWUtil.LargeArray <byte>(to.meta.totalSamples * (to.meta.bitsPerSample / 8));
break;
case WWAFUtil.FileFormatType.WAVE:
data = new WWUtil.LargeArray <byte>(to.meta.totalSamples * (to.meta.bitsPerSample / 8));
break;
default:
System.Diagnostics.Debug.Assert(false);
data = null;
break;
}
var adp = new AudioDataPerChannel();
adp.mDataFormat = AudioDataPerChannel.DataFormat.Pcm;
adp.mData = data;
adp.mBitsPerSample = to.meta.bitsPerSample;
adp.mValueRepresentationType = to.writeValueRepresentation;
adp.mTotalSamples = to.meta.totalSamples;
to.pcm.Add(adp);
}
return(0);
}
