forked from sin365/AxibugEmuOnline
83 lines
3.4 KiB
C#
83 lines
3.4 KiB
C#
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using System.IO;
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namespace MAME.Core
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{
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public class WavWrite
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{
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public static FileStream mWaveFile = null;
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private static BinaryWriter mWriter = null;
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private static int mSampleCount = 0;
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public static void CreateSoundFile(string filename)
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{
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mWaveFile = new FileStream(filename, FileMode.Create);
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mWriter = new BinaryWriter(mWaveFile);
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/**************************************************************************
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Hereiswherethefilewillbecreated.A
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wavefileisaRIFFfile,whichhaschunks
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ofdatathatdescribewhatthefilecontains.
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AwaveRIFFfileisputtogetherlikethis:
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The12byteRIFFchunkisconstructedlikethis:
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Bytes0-3: 'R''I''F''F'
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Bytes4-7: Lengthoffile,minusthefirst8bytesoftheRIFFdescription.
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(4bytesfor"WAVE"+24bytesforformatchunklength+
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8bytesfordatachunkdescription+actualsampledatasize.)
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Bytes8-11:'W''A''V''E'
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The24byteFORMATchunkisconstructedlikethis:
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Bytes0-3:'f''m''t'''
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Bytes4-7:Theformatchunklength.Thisisalways16.
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Bytes8-9:Filepadding.Always1.
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Bytes10-11:Numberofchannels.Either1formono, or2forstereo.
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Bytes12-15:Samplerate.
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Bytes16-19:Numberofbytespersecond.
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Bytes20-21:Bytespersample.1for8bitmono,2for8bitstereoor
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16bitmono,4for16bitstereo.
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Bytes22-23:Numberofbitspersample.
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TheDATAchunkisconstructedlikethis:
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Bytes0-3:'d''a''t''a'
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Bytes4-7:Lengthofdata,inbytes.
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Bytes8-:Actualsampledata.
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***************************************************************************/
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char[] ChunkRiff = { 'R', 'I', 'F', 'F' };
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char[] ChunkType = { 'W', 'A', 'V', 'E' };
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char[] ChunkFmt = { 'f', 'm', 't', ' ' };
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char[] ChunkData = { 'd', 'a', 't', 'a' };
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short shPad = 1; //Filepadding
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int nFormatChunkLength = 0x10; //Formatchunklength.
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int nLength = 0; //Filelength,minusfirst8bytesofRIFFdescription.Thiswillbefilledinlater.
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mSampleCount = 0;
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//RIFF
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mWriter.Write(ChunkRiff);
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mWriter.Write(nLength);
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//WAVE
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mWriter.Write(ChunkType);
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mWriter.Write(ChunkFmt);
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mWriter.Write(nFormatChunkLength);
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mWriter.Write(shPad);
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mWriter.Write((short)2);
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mWriter.Write(48000);
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mWriter.Write(192000);
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mWriter.Write((short)4);
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mWriter.Write((short)16);
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//data
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mWriter.Write(ChunkData);
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mWriter.Write((int)0);
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}
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public static void CloseSoundFile()
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{
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mWriter.Seek(4, SeekOrigin.Begin);
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mWriter.Write((int)(mSampleCount + 36));
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mWriter.Seek(40, SeekOrigin.Begin);
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mWriter.Write(mSampleCount);
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mWriter.Close();
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mWaveFile.Close();
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mWriter = null;
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mWaveFile = null;
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}
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public static void wav_add_data_16(byte[] bb1, int length)
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{
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mWriter.Write(bb1, 0, length);
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mSampleCount += length;
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mWriter.Flush();
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}
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}
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}
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