Создание WAV файла [D3, D4, Win95/98]
Konstantin_ © (2002-06-16 18:28:00)
Привет всем!
Кто подскажет,как создать пустой файл .WAV
Проблема в том,что компонента MedyaPlayer работает только с
созданным файлом,а не позволяет его создать.
sevylor (2002-06-19 01:30:00) [1]
type TWaveHeader = record
Marker1: Array[0..3] of Char;
BytesFollowing: LongInt;
Marker2: Array[0..3] of Char;
Marker3: Array[0..3] of Char;
Fixed1: LongInt;
FormatTag: Word;
Channels: Word;
SampleRate: LongInt;
BytesPerSecond: LongInt;
BytesPerSample: Word;
BitsPerSample: Word;
Marker4: Array[0..3] of Char;
DataBytes: LongInt;
end;
procedure CreateWavFile(const
aSampleRate,aDuration,aBits,aChannels:integer;
const aName:String);
implementation
procedure CreateWavFile(const
aSampleRate,aDuration,aBits,aChannels:integer;
const aName:String);
var WaveHeader:TwaveHeader;
f:file of byte;
DataBytes:integer;
begin
// for Duration=0 (in ms) DataBytes=0
DataBytes := aChannels;
DataBytes := DataBytes * aSampleRate;
DataBytes := DataBytes * aBits;
DataBytes := DataBytes div 8;
DataBytes := DataBytes * aDuration;
DataBytes := DataBytes div 1000;
WaveHeader.Marker1 := "RIFF";
WaveHeader.BytesFollowing := DataBytes + 36;
WaveHeader.Marker2 := "WAVE";
WaveHeader.Marker3 := "fmt ";
WaveHeader.Fixed1 := 16;
WaveHeader.FormatTag := 1;
WaveHeader.SampleRate := aSampleRate;
WaveHeader.Channels := aChannels;
WaveHeader.BytesPerSecond := aChannels;
WaveHeader.BytesPerSecond := WaveHeader.BytesPerSecond *
aSampleRate;
WaveHeader.BytesPerSecond := WaveHeader.BytesPerSecond *
aBits;
WaveHeader.BytesPerSecond := WaveHeader.BytesPerSecond div 8;
WaveHeader.BytesPerSample := aChannels * aBits div 8;
WaveHeader.BitsPerSample := aBits;
WaveHeader.Marker4 := "data";
WaveHeader.DataBytes := DataBytes;
AssignFile(f,aName);
Rewrite(f);
BlockWrite(f,WaveHeader,SizeOf(WaveHeader));
CloseFile(f);
end;
end.
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