uses
System.SysUtils,
System.Classes,
- wav in 'wav.pas',
- WriteHeader in 'WriteHeader.pas',
spWav in 'spWav.pas';
-function cut(fpIn, fpOut: TFileStream; sp: SpParam): integer;
+function wavDataWrite(fpOut: TFileStream; const sp: SpParam): integer;
var
- Buffer: array of ShortInt;
- size: integer;
+ i: integer;
+ s, tempsamplePerCycle, deltaAdd, curLevel: Single;
+ curSampling, samplePerCycle: LongInt;
+ c: array [0..1] of ShortInt;
begin
- result := 0;
- size := (sp.endpos - sp.startpos + 1) * sp.channels * sp.samplePerSec *
- sp.bitsPerSample div 8;
- SetLength(Buffer, size);
- try
- fpIn.ReadBuffer(Pointer(Buffer)^, size);
- fpOut.WriteBuffer(Pointer(Buffer)^, size);
- Finalize(Buffer);
- except
- result := -1;
- end;
-end;
-
-function checkRange(var sp: SpParam): integer;
-begin
- result := 0;
- if sp.startpos * sp.bytesPerSec > sp.sizeOfData then
+ tempsamplePerCycle:=sp.samplePerSec*sp.cycleuSec div 1000000;
+ samplePerCycle:=Trunc(tempsamplePerCycle);
+ if samplePerCycle <= 0 then
begin
- Writeln('\8aJ\8en\88Ê\92u\82ª\83t\83@\83C\83\8b\83T\83C\83Y\82ð\92´\82¦\82Ä\82¢\82Ü\82·');
- result := -1;
- end
- else if (sp.endpos + 1) * sp.bytesPerSec > sp.sizeOfData then
+ Writeln('\8eü\94g\90\94\82ª\8d\82\82·\82¬');
+ result:=-1;
+ Exit;
+ end;
+ deltaAdd:=65535/samplePerCycle;
+ curLevel:=0;
+ curSampling:=0;
+ i:=0;
+ s:=sp.sizeOfData/SizeOf(@c);
+ while i < s do
begin
- Writeln('\8fI\97¹\88Ê\92u\82ª\83t\83@\83C\83\8b\83T\83C\83Y\82ð\92´\82¦\82Ä\82¢\82Ü\82·');
- Writeln('\8fI\97¹\82ð\83t\83@\83C\83\8b\82Ì\8dÅ\8cã\82É\92²\90®\82µ\82Ü\82µ\82½');
- sp.endpos := (sp.sizeOfData div sp.bytesPerSec) - 1;
+ inc(i);
+ c[0]:=ShortInt(Trunc(curLevel-32788));
+ c[1]:=c[0];
+ fpOut.WriteBuffer(c,SizeOf(@c));
+ curLevel:=curLevel+deltaAdd;
+ inc(curSampling);
+ if curSampling > samplePerCycle then
+ begin
+ curLevel:=0;
+ curSampling:=0;
+ end;
end;
end;
-function wavDataWrite(fpIn, fpOut: TFileStream; const sp: SpParam): integer;
-begin
- fpIn.Position := sp.posOfData;
- result := cut(fpIn, fpOut, sp);
-end;
-
-function wavWrite(inFile, outFile: PChar; var sp: SpParam): integer;
+function wavWrite(outFile: PChar; const wHdr: WrSWaveFileHeader;
+ var sp: SpParam): integer;
var
fpIn, fpOut: TFileStream;
begin
+ result := 0;
try
- fpIn := TFileStream.Create(inFile, fmOpenRead);
fpOut := TFileStream.Create(outFile, fmCreate);
- sp.sizeOfData := (sp.endpos - sp.startpos + 1) * sp.bytesPerSec;
- if waveHeaderWrite(fpOut, sp) > 44 then
- raise EWriteError.Create('\83w\83b\83_\82ð\8f\91\82«\8d\9e\82ß\82Ü\82¹\82ñ');
- if wavDataWrite(fpIn, fpOut, sp) = -1 then
- raise EWriteError.Create('\83G\83\89\81[\94\90¶');
+ fpOut.WriteBuffer(wHdr, SizeOf(WrSWaveFileHeader));
+ if wavDataWrite(fpOut, sp) = -1 then
+ raise EWriteError.Create('');
except
on EFOpenError do
- Writeln(inFile, '\82ð\83I\81[\83v\83\93\82Å\82«\82Ü\82¹\82ñ');
- on EFOpenError do
- fpIn.Free;
- else
-
begin
- fpIn.Free;
- fpOut.Free;
+ Writeln(outFile, '\82ð\83I\81[\83v\83\93\82Å\82«\82Ü\82¹\82ñ');
+ result := -1;
+ end;
+ on EWriteError do
+ begin
+ Writeln('\83w\83b\83_\82ð\8f\91\82«\8d\9e\82ß\82Ü\82¹\82ñ');
+ result := -1;
end;
- result := -1;
- Exit;
end;
- result := 0;
+ fpOut.Free;
+end;
+
+procedure usage;
+begin
+ Writeln('\82Ì\82±\82¬\82è\94g');
+ Writeln('\97á\81Feffect.wav 100 2000');
+end;
+
+procedure setupHeader(var wHdr: WrSWaveFileHeader; var sp: SpParam);
+var
+ bytes: Byte;
+begin
+ wHdr.hdrRiff := STR_RIFF;
+ wHdr.sizeOfFile := sp.sizeOfData + SizeOf(WrSWaveFileHeader) - 8;
+ wHdr.hdrWave := STR_WAVE;
+ wHdr.hdrFmt := STR_fmt;
+ wHdr.sizeOfFmt := SizeOf(tWaveFormatPcm);
+ wHdr.stWaveFormat.formatTag := 1;
+ wHdr.stWaveFormat.channels := sp.channels;
+ wHdr.stWaveFormat.sampleParSec := sp.samplePerSec;
+ bytes := sp.bitsPerSample div 8;
+ wHdr.stWaveFormat.bytesPerSec := bytes * sp.channels * sp.samplePerSec;
+ wHdr.stWaveFormat.blockAlign := bytes * sp.channels;
+ wHdr.stWaveFormat.bitsPerSample := sp.bitsPerSample;
+ wHdr.hdrData := STR_data;
+ wHdr.sizeOfData := sp.sizeOfData;
end;
var
sp: SpParam;
+ totalLength: integer;
+ hdrHeader: WrSWaveFileHeader;
begin
try
{ TODO -oUser -cConsole \83\81\83C\83\93 : \82±\82±\82É\83R\81[\83h\82ð\8bL\8fq\82µ\82Ä\82\82¾\82³\82¢ }
- sp.startpos := StrToInt(ParamStr(3));
- sp.endpos := StrToInt(ParamStr(4));
- if sp.startpos > sp.endpos then
+ if ParamCount <> 3 then
begin
- Writeln('\8aJ\8en\95b\82Í\8fI\97¹\95b\82ð\92´\82¦\82Ä\82Í\82È\82è\82Ü\82¹\82ñ');
+ usage;
Exit;
end;
- if wavHdrRead(PChar(ParamStr(1)), sp) = -1 then
- Exit;
- if wavWrite(PChar(ParamStr(1)), PChar(ParamStr(2)), sp) = -1 then
+ totalLength := StrToInt(ParamStr(2));
+ sp.cycleuSec := StrToInt(ParamStr(3));
+ sp.channels := WAV_STEREO;
+ sp.samplePerSec := 44100;
+ sp.bitsPerSample := 16;
+ sp.sizeOfData := sp.bitsPerSample * sp.channels * sp.samplePerSec *
+ totalLength div 8;
+ setupHeader(hdrHeader, sp);
+ if wavWrite(PChar(ParamStr(1)), hdrHeader, sp) = -1 then
Exit;
Writeln('\8a®\97¹');
except