public static ISound ReadFromData(byte[] data, SoundType soundType)
{
switch (soundType)
{
case SoundType.Wav:
return(WavSound.GetWavSound(data));
case SoundType.Mp3:
return(null);
default:
return(null);
}
}
public static ISound ReadFromFile(string path)
{
if (!File.Exists(path))
{
throw new FileNotFoundException($@"{path}: No such file or Directory");
}
var fileExtension = Path.GetExtension(path);
if (!AcceptedFormats.Contains(fileExtension)) // TODO: Check through other way using Linux Style :)
{
throw new Exception($@"{path}: Format not accepted"); // TODO: Define new type of exception
}
var bytes = File.ReadAllBytes(path);
switch (fileExtension)
{
case ".wav":
return(WavSound.GetWavSound(bytes));
case ".mp3":
var sound2 = new Mp3Sound();
// TODO: ID3v2
//ID3v1
if (Encoding.UTF8.GetString(bytes.Slice(0, 3)) != "ID3")
{
var headerBits = bytes.Slice(0, 4).ToBitsArray();
/*var frameSync = headerBits.Take(11).ToList();
* if (frameSync.Sum() != frameSync.Count)
* throw new Exception("Invalid MP3 file");*/
var mpegVersion = headerBits.Skip(11).Take(2).ToList();
if (mpegVersion[0] == 0)
{
sound2.MpegVersion = mpegVersion[1] == 0 ? MpegVersion.Mpeg25 : MpegVersion.Reserved;
}
else
{
sound2.MpegVersion = mpegVersion[1] == 0 ? MpegVersion.Mpeg2 : MpegVersion.Mpeg1;
}
var layerType = headerBits.Skip(13).Take(2).ToList();
if (layerType[0] == 0)
{
sound2.LayerType = layerType[1] == 0 ? LayerType.Reserved : LayerType.Layer3;
}
else
{
sound2.LayerType = layerType[1] == 0 ? LayerType.Layer2 : LayerType.Layer1;
}
var protectionBit = headerBits.Skip(15).Take(1).ToList()[0];
sound2.Protection = protectionBit == 0;
var bitRateBits = headerBits.Skip(16).Take(4).ToList();
switch (bitRateBits)
{
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 0, 0, 0
}):
sound2.BitRateIndex = 0;
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 0, 0, 1
}):
if ((sound2.MpegVersion == MpegVersion.Mpeg2 || sound2.MpegVersion == MpegVersion.Mpeg25) &&
(sound2.LayerType == LayerType.Layer2 || sound2.LayerType == LayerType.Layer3))
{
sound2.BitRateIndex = 8;
}
else
{
sound2.BitRateIndex = 32;
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 0, 1, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 64 : 48;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 48 : 16;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 40 : 16;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 0, 1, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 96 : 56;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 56 : 24;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 48 : 24;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 1, 0, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 128 : 64;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 64 : 32;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 56 : 32;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 1, 0, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 160 : 80;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 80 : 40;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 64 : 40;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 1, 1, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 192 : 96;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 96 : 48;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 80 : 48;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
0, 1, 1, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 224 : 112;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 112 : 56;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 96 : 56;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 0, 0, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 256 : 128;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 128 : 64;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 112 : 64;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 0, 0, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 288 : 144;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 160 : 80;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 128 : 80;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 0, 1, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 320 : 160;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 192 : 96;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 160 : 96;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 0, 1, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 352 : 176;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 224 : 112;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 192 : 112;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 1, 0, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 384 : 192;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 256 : 128;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 224 : 128;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 1, 0, 1
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 416 : 224;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 320 : 144;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 256 : 144;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case var _ when bitRateBits.IsEqualTo(new List <int> {
1, 1, 1, 0
}):
switch (sound2.LayerType)
{
case LayerType.Layer1:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 448 : 256;
break;
case LayerType.Layer2:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 384 : 160;
break;
case LayerType.Layer3:
sound2.BitRateIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 320 : 160;
break;
case LayerType.Reserved:
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
default:
sound2.BitRateIndex = -1;
break;
}
var frequencyIndexBits = headerBits.Skip(20).Take(2).ToList();
switch (frequencyIndexBits)
{
case var _ when frequencyIndexBits.IsEqualTo(new List <int> {
0, 0
}):
sound2.RateFrequencyIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 44100 :
sound2.MpegVersion == MpegVersion.Mpeg2 ? 22050 : 11025;
break;
case var _ when frequencyIndexBits.IsEqualTo(new List <int> {
0, 1
}):
sound2.RateFrequencyIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 48000 :
sound2.MpegVersion == MpegVersion.Mpeg2 ? 24000 : 12000;
break;
case var _ when frequencyIndexBits.IsEqualTo(new List <int> {
1, 0
}):
sound2.RateFrequencyIndex = sound2.MpegVersion == MpegVersion.Mpeg1 ? 32000 :
sound2.MpegVersion == MpegVersion.Mpeg2 ? 16000 : 8000;
break;
case var _ when frequencyIndexBits.IsEqualTo(new List <int> {
1, 1
}):
sound2.RateFrequencyIndex = -1;
break;
}
var paddingBit = headerBits.Skip(22).Take(1).ToList();
sound2.Padded = paddingBit[0] == 1;
var privateBit = headerBits.Skip(23).Take(1).ToList();
sound2.PrivateBit = privateBit[0] == 1;
var channelModeBits = headerBits.Skip(24).Take(2).ToList();
if (channelModeBits[0] == 0)
{
sound2.ChannelMode = channelModeBits[1] == 0 ? ChannelMode.Stereo : ChannelMode.JointStereo;
}
else
{
sound2.ChannelMode = channelModeBits[1] == 0 ? ChannelMode.DualChannel : ChannelMode.SingleChannel;
}
var modeExtenstionBits = headerBits.Skip(26).Take(2).ToList();
var copyrightBits = headerBits.Skip(28).Take(1).ToList();
sound2.Copyright = copyrightBits[0] == 1;
var originalBits = headerBits.Skip(29).Take(1).ToList();
sound2.Original = originalBits[0] == 1;
var emphasisBits = headerBits.Skip(30).ToList();
if (emphasisBits[0] == 0)
{
sound2.EmphasisType = emphasisBits[1] == 0 ? EmphasisType.None : EmphasisType._50_15ms;
}
else
{
sound2.EmphasisType = emphasisBits[1] == 0 ? EmphasisType.Reserved : EmphasisType.Ccitj17;
}
}
else //ID3v2
{
var majorVersion = BitConverter.ToInt32(bytes.Slice(3, 1, 4), 0);
var minorVersion = BitConverter.ToInt32(bytes.Slice(4, 1, 4), 0);
var flagsBits = bytes[5].ToBitsArray();
var unsynchronisationFlag = flagsBits[0] == 1;
var extendedHeaderFlag = flagsBits[1] == 1;
var experimentalIndicatorFlag = flagsBits[2] == 1;
var footerPresentFlag = flagsBits[3] == 1;
if (!flagsBits.Skip(4).ToList().IsEqualTo(new List <int> {
0, 0, 0, 0
}))
{
throw new Exception("MP3 Error");
}
var size = bytes[9] + bytes[8] << 7 + bytes[6] << 14 + bytes[5] << 21;
var currentByte = 10;
if (extendedHeaderFlag)
{
var extendedHeaderSize = bytes[currentByte + 3] + bytes[currentByte + 2] <<
7 + bytes[currentByte + 1] << 14 + bytes[currentByte] << 21;
currentByte += extendedHeaderSize; //5; // skip flags size
// TODO: parse extended header - optional
// https://mutagen-specs.readthedocs.io/en/latest/id3/id3v2.4.0-structure.html
}
// TODO: Frames
// TODO: Parse padding - optional
// TODO: Parse footer - optional
}
// TODO: Data from mp3
var tagBytes = bytes.Reverse().Take(128).Reverse().ToArray();
var tagString = Encoding.UTF8.GetString(tagBytes.Slice(0, 3));
if (tagString.ToUpper() != "TAG")
{
return(sound2);
}
var tag = new Tag
{
Title = Encoding.UTF8.GetString(tagBytes.Slice(3, 30)).Trim('\0'),
Artist = Encoding.UTF8.GetString(tagBytes.Slice(33, 30)).Trim('\0'),
Album = Encoding.UTF8.GetString(tagBytes.Slice(63, 30)).Trim('\0'),
Year = Encoding.UTF8.GetString(tagBytes.Slice(93, 4)).Trim('\0'),
CommentV1 = Encoding.UTF8.GetString(tagBytes.Slice(97, 30)).Trim('\0'),
CommentV2 = Encoding.UTF8.GetString(tagBytes.Slice(97, 28)).Trim('\0'),
AlbumTrack = Encoding.UTF8.GetString(tagBytes.Slice(125, 2)).Trim('\0'),
Genre = BitConverter.ToInt32(tagBytes.Slice(127, 1, 4), 0)
};
sound2.Tag = tag;
return(sound2);
default:
return(null);
}
}
public static WavSound GetWavSound(byte[] bytes)
{
var sound = new WavSound {
RawBinary = bytes.ToList()
};
var currentIndex = 0;
sound.ChunkId = Encoding.UTF8.GetString(bytes.Slice(currentIndex, 4));
currentIndex += 4;
bool bigEndian;
switch (sound.ChunkId)
{
case SoundConstants.RIFF:
bigEndian = false;
break;
case SoundConstants.RIFX:
bigEndian = true;
break;
default:
throw new Exception($"Unknown format: {sound.ChunkId}");
}
sound.ChunkSize = bytes.Slice(currentIndex, 4).GetUInt(bigEndian) + 8;
currentIndex += 4;
sound.Format = Encoding.UTF8.GetString(bytes.Slice(currentIndex, 4));
currentIndex += 4;
if (sound.Format != "WAVE")
{
throw new Exception("This is not a WAV File");
}
var fmtChunkReceived = false;
while (currentIndex < bytes.Length)
{
var chunkId = Encoding.UTF8.GetString(bytes.Slice(currentIndex, 4));
currentIndex += 4;
switch (chunkId)
{
case SoundConstants.FMT_ID:
fmtChunkReceived = true;
sound.SubChunk1Id = chunkId;
sound.SubChunk1Size = bytes.Slice(currentIndex, 4).GetUInt(bigEndian);
currentIndex += 4;
var bytesRead = 0;
if (sound.SubChunk1Size < 16)
{
throw new Exception("Wrong WAV file format");
}
sound.AudioFormat = bytes.Slice(currentIndex, 2, 4).GetUShort(bigEndian);
currentIndex += 2;
sound.NumChannels = bytes.Slice(currentIndex, 2, 4).GetUShort(bigEndian);
currentIndex += 2;
sound.SampleRate = bytes.Slice(currentIndex, 4).GetUInt(bigEndian);
currentIndex += 4;
sound.ByteRate = bytes.Slice(currentIndex, 4).GetUInt(bigEndian);
currentIndex += 4;
sound.BlockAlign = bytes.Slice(currentIndex, 2, 4).GetUShort(bigEndian);
currentIndex += 2;
sound.BitDepth = bytes.Slice(currentIndex, 2, 4).GetUShort(bigEndian);
currentIndex += 2;
bytesRead += 16;
if (sound.AudioFormat == SoundConstants.WAVE_FORMAT_EXTENSIBLE && sound.SubChunk1Size >= 18)
{
sound.ExtraChunkSize = bytes.Slice(currentIndex, 2, 4).GetUShort(bigEndian);
bytesRead += 2;
currentIndex += 2;
if (sound.ExtraChunkSize >= 22)
{
sound.ExtraData = bytes.Slice(currentIndex, 22, 4);
currentIndex += 22;
bytesRead += 22;
var rawGuid = sound.ExtraData.Slice(6, 16, 4);
var tail = bigEndian
? new byte[] { 0x0, 0x0, 0x0, 0x10, 0x80, 0x0, 0x0, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
: new byte[] { 0x0, 0x0, 0x10, 0x0, 0x80, 0x0, 0x0, 0xAA, 0x0, 0x38, 0x9B, 0x71 };
if (rawGuid.EndsWith(tail))
{
sound.AudioFormat = rawGuid.Skip(rawGuid.Length - 4).ToArray().GetUShort(bigEndian);
}
}
else
{
throw new Exception("Wave error");
}
}
if (!SoundConstants.KNOWN_WAVE_FORMATS.Contains(sound.AudioFormat))
{
throw new Exception("Unknown wave format");
}
if (sound.SubChunk1Size > bytesRead)
{
currentIndex += (int)(sound.SubChunk1Size - bytesRead);
}
if (!new List <ushort> {
8, 16, 32, 64, 96, 128
}.Contains(sound.BitDepth))
{
throw new Exception($"Unsupported bit depth: {sound.BitDepth}-Bit");
}
break;
case SoundConstants.FACT_ID:
if (currentIndex + 4 < bytes.Length)
{
currentIndex += 4 + bytes.Slice(currentIndex, 4, 4).GetUShort(bigEndian);
}
break;
case SoundConstants.DATA_ID:
if (!fmtChunkReceived)
{
throw new Exception("No ftm chunk before data");
}
sound.SubChunk2Id = chunkId;
sound.SubChunk2Size = bytes.Slice(currentIndex, 4, 4).GetUInt(bigEndian);
currentIndex += 4;
var bytesPerSample = (ushort)(sound.BitDepth / 8);
var type = sound.BitDepth == 8 ?
"u1" :
(bigEndian ? ">" : "<") +
(sound.AudioFormat == SoundConstants.WAVE_FORMAT_PCM ? "i" : "f") +
bytesPerSample;
sound.Data = bytes.Skip(currentIndex).Take((int)sound.SubChunk2Size).ToArray().FromBuffer(type);
currentIndex += (int)sound.SubChunk2Size;
// if (sound.NumChannels > 1)
break;
case SoundConstants.LIST_ID:
if (currentIndex + 4 < bytes.Length)
{
currentIndex += 4 + bytes.Slice(currentIndex, 4, 4).GetUShort(bigEndian);
}
break;
case var _ when new List <string> {
SoundConstants.JUNK_ID, SoundConstants.FAKE_ID
}.Contains(sound.SubChunk1Id):
if (currentIndex + 4 < bytes.Length)
{
currentIndex += 4 + bytes.Slice(currentIndex, 4, 4).GetUShort(bigEndian);
}
break;
default:
// warning
if (currentIndex + 4 < bytes.Length)
{
currentIndex += 4 + bytes.Slice(currentIndex, 4, 4).GetUShort(bigEndian);
}
break;
}
}
sound.Duration = sound.ChunkSize * 1.0 / (sound.SampleRate * sound.NumChannels * sound.BitDepth / 8.0);
return(sound);
}
