/// <summary>
/// WAVファイルのヘッダ部分を読み込む。
/// </summary>
/// <returns>読めたらtrue</returns>
private bool ReadWavFileHeader(string path)
{
bool result = false;
var pd = new PcmData();
var wavR = new WavReader();
using (BinaryReader br = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read))) {
if (wavR.ReadHeader(br))
{
// WAVヘッダ読み込み成功。PcmDataを作って再生リストに足す。
pd.SetFormat(wavR.NumChannels, wavR.BitsPerSample, wavR.ValidBitsPerSample,
(int)wavR.SampleRate, wavR.SampleValueRepresentationType, wavR.NumFrames);
if (wavR.SampleDataType == WavReader.DataType.DoP)
{
pd.SampleDataType = PcmData.DataType.DoP;
}
if ("RIFFINFO_INAM".Equals(wavR.Title) &&
"RIFFINFO_IART".Equals(wavR.ArtistName))
{
// Issue 79 workaround
}
else
{
if (wavR.Title != null)
{
pd.DisplayName = wavR.Title;
}
if (wavR.AlbumName != null)
{
pd.AlbumTitle = wavR.AlbumName;
}
if (wavR.ArtistName != null)
{
pd.ArtistName = wavR.ArtistName;
}
if (wavR.ComposerName != null)
{
pd.ComposerName = wavR.ComposerName;
}
}
pd.SetPicture(wavR.PictureBytes, wavR.PictureData);
result = CheckAddPcmData(path, pd, true);
}
else
{
LoadErrorMessageAdd(string.Format(CultureInfo.InvariantCulture, Properties.Resources.ReadFileFailed + ": {1} : {2}{3}",
"WAV", path, wavR.ErrorReason, Environment.NewLine));
}
}
return(result);
}
public string ReadHeader(BinaryReader br, out PcmData pcmData)
{
pcmData = new PcmData();
ResultType result = ReadFormChunkHeader(br);
if (result != ResultType.Success)
{
mSB.Append(string.Format("Error: Form Chunkチャンクの読み込み失敗。{0}\r\n", result));
return(mSB.ToString());
}
if (mIsAIFC)
{
// AIFCの場合、FVERチャンクが来る(required)
result = ReadFverChunk(br);
if (ResultType.Success != result)
{
mSB.Append(string.Format("Error: AIFC FVERチャンクのエラー。{0}\r\n", result));
return(mSB.ToString());
}
}
result = ReadCommonChunk(br);
if (ResultType.Success != result)
{
mSB.Append(string.Format("Error: COMMチャンクのエラー。{0}\r\n", result));
return(mSB.ToString());
}
result = ReadSoundDataChunk(br);
if (ResultType.Success != result)
{
mSB.Append(string.Format("Error: SSNDチャンクのエラー。{0}\r\n", result));
return(mSB.ToString());
}
if (16 != BitsPerSample &&
24 != BitsPerSample)
{
mSB.Append(string.Format("Info: 量子化ビット数がエキゾチックです。{0} bit\r\n", BitsPerSample));
return(mSB.ToString());
}
pcmData.SetFormat(
NumChannels,
BitsPerSample,
BitsPerSample,
SampleRate,
PcmData.ValueRepresentationType.SInt,
NumFrames);
result = ReadID3Chunk(br);
switch (result)
{
case ResultType.NotFoundID3Header:
// ID3ヘッダーが無い。
break;
case ResultType.Success:
// ID3読み込み成功
pcmData.DisplayName = TitleName;
pcmData.AlbumTitle = AlbumName;
pcmData.ArtistName = ArtistName;
pcmData.ComposerName = Composer;
if (0 < PictureBytes)
{
pcmData.SetPicture(PictureBytes, PictureData);
}
mSB.Append(string.Format(" TitleName={0}\r\n", TitleName));
mSB.Append(string.Format(" AlbumName={0}\r\n", AlbumName));
mSB.Append(string.Format(" ArtistName={0}\r\n", ArtistName));
mSB.Append(string.Format(" Composer={0}\r\n", Composer));
mSB.Append(string.Format(" ID3チャンク読み込み終了。\r\n"));
break;
default:
mSB.Append(string.Format("Error: ID3チャンクのエラー。{0}\r\n", result));
return(mSB.ToString());
}
mSB.Append("正常終了。\r\n");
return(mSB.ToString());
}
