wavfmt.h

00001 #ifndef WAVFMT_H
00002 #define WAVFMT_H
00003 
00004 #ifdef __cplusplus
00005 extern "C" {
00006 #endif
00007 
00008 
00009 typedef struct {
00010     char               chunkID[4];
00011     long               chunkSize;
00012 } ChunkHeader;
00013 
00014 
00015 #define RiffID "RIFF"  /* chunk ID for RIFF Chunk */
00016 #define RIFF_FORMAT  "WAVE" 
00017 
00018 typedef struct {
00019     char               chunkID[4]; //'RIFF'
00020     long               chunkSize;
00021     char               RiffFmt[4];   //'WAVE' 
00022 } RiffChunk;
00023 
00024 
00025 
00026 #define WAVE_FORMAT_PCM             0X01
00027 #define WAVE_CHANNEL_MONO         1
00028 #define WAVE_CHANNEL_STEREO      2
00029 
00030 
00031 
00032 #define OFFSET_FMT_CHK   sizeof(RiffChunk)
00033 #define FormatID "fmt "    /* chunkID for Format Chunk. NOTE: There is a space at the end of this ID. */
00034 
00035 typedef struct {
00036     char               chunkID[4];
00037     long               chunkSize;
00038     short              wFormatTag;
00039     unsigned short wChannels;
00040     unsigned long  dwSamplesPerSec;
00041     unsigned long  dwAvgBytesPerSec;
00042     unsigned short wBlockAlign;
00043     unsigned short wBitsPerSample;
00044     /* Note: there may be additional fields here, depending upon wFormatTag. */
00045     
00046 } FormatChunk;
00047 
00048 
00049 #define OFFSET_DATA_CHK   (OFFSET_FMT_CHK + sizeof(FormatChunk))
00050 #define DataID "data"  /* chunk ID for data Chunk */
00051 
00052 typedef struct {
00053     char               chunkID[4];
00054     long               chunkSize;
00055 
00056     unsigned char  waveformData[];
00057 } DataChunk;
00058 
00059 
00060 #define ListID "list"  /* chunk ID for list Chunk */
00061 
00062 typedef struct {
00063     char               chunkID[4];      /* 'list' */
00064     long               chunkSize;   /* includes the Type ID below */
00065     char               typeID[];     /* 'adtl' */
00066 } ListHeader;
00067 
00068 
00069 #define WAVE_HEADER_SIZE (OFFSET_DATA_CHK + sizeof(DataChunk))
00070 
00071 
00072 int wavfmt_remove_header(FILE *pFile);
00073 int wavfmt_add_riff_chunk(FILE *pFile, long size);
00074 int wavfmt_add_fmt_chunk(FILE *pFile, unsigned short wChannels, unsigned long  dwSamplesPerSec, unsigned long  dwAvgBytesPerSec, unsigned short wBitsPerSample);
00075 int wavfmt_add_data_chunk_header(FILE *pFile, long size);
00076 
00077 
00078 #ifdef __cplusplus
00079 }
00080 #endif
00081 
00082 
00083 #endif