MythTV: wavfile.h Source File

00001 /*
00002         wavfile.h
00003 
00004         (c) 2004 Paul Volkaerts
00005         
00006 */
00007 
00008 
00009 #ifndef WAVFILE_H_
00010 #define WAVFILE_H_
00011 
00012 
00013 
00014 struct wavstruct
00015 {
00016     char ChunkId[4];
00017     long ChunkSize;
00018     char Format[4];
00019 
00020     char subChunk1Id[4];
00021     long subChunk1Size;
00022     short AudioFormat;
00023     short NumChannels;
00024     long  SampleRate;
00025     long ByteRate;
00026     short BlockAlign;
00027     short BitsPerSample;
00028     
00029     char subChunk2Id[4];
00030     long subChunk2Size;
00031 };
00032 
00033 class wavfile
00034 {
00035   public:
00036     wavfile();
00037     ~wavfile();
00038     bool load(const char *Filename);
00039     void load(short *data, int samples, int bitsPerSample=16, int AudioFormat=1, int nChan=1, int SampleRate=8000);
00040     void print();
00041     bool saveToFile(const char *Filename);
00042     short *getData() { return (short *)audio; };
00043     int samples()    { if (loaded) return (w.subChunk2Size / (w.BitsPerSample/8)); else return 0; }
00044 
00045   private:
00046     void transcodeTo8K();
00047 
00048     bool loaded;
00049     wavstruct w;
00050     char *audio;
00051 };
00052 
00053 
00054 #endif