wavehdr.h

/*
 * Copyright (C) 2019 by Hayati Ayguen <h_ayguen@web.de>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __WAVEHDR_H
#define __WAVEHDR_H
 
#include <stdint.h>
#include <stdio.h>
#include <time.h>
 
#pragma pack(push)
#pragma pack(1)
 
typedef struct
{
    char        ID[4];
    uint32_t    size;
} chunk_hdr;
 
typedef struct
{
    uint16_t    wYear;          /* 1601 through 30827 */
    uint16_t    wMonth;         /* 1..12 */
    uint16_t    wDayOfWeek;     /* 0 .. 6: 0 == Sunday, .., 6 == Saturday */
    uint16_t    wDay;           /* 1 .. 31 */
    uint16_t    wHour;          /* 0 .. 23 */
    uint16_t    wMinute;        /* 0 .. 59 */
    uint16_t    wSecond;        /* 0 .. 59 */
    uint16_t    wMilliseconds;  /* 0 .. 999 */
} Wind_SystemTime;
 
 
typedef struct
{
    /* RIFF header */
    chunk_hdr   hdr;        /* ID == "RIFF" string, size == full filesize - 8 bytes (maybe with some byte missing...) */
    char        waveID[4];  /* "WAVE" string */
} riff_chunk;
 
typedef struct
{
    /* FMT header */
    chunk_hdr   hdr;        /* ID == "fmt " */
    int16_t     wFormatTag;
    int16_t     nChannels;
    int32_t     nSamplesPerSec;
    int32_t     nAvgBytesPerSec;
    int16_t     nBlockAlign;
    int16_t     nBitsPerSample;
} fmt_chunk;
 
typedef struct
{
    /* auxi header - used by SpectraVue / rfspace / HDSDR / ELAD FDM .. */
    chunk_hdr   hdr;        /* ="auxi" (chunk rfspace) */
    Wind_SystemTime StartTime;
    Wind_SystemTime StopTime;
    uint32_t    centerFreq;     /* receiver center frequency */
    uint32_t    ADsamplerate;   /* A/D sample frequency before downsampling */
    uint32_t    IFFrequency;    /* IF freq if an external down converter is used */
    uint32_t    Bandwidth;      /* displayable BW if you want to limit the display to less than Nyquist band */
    int32_t     IQOffset;       /* DC offset of the I and Q channels in 1/1000's of a count */
    int32_t     Unused2;
    int32_t     Unused3;
    int32_t     Unused4;
    int32_t     Unused5;
} auxi_chunk;
 
typedef struct
{
    /* DATA header */
    chunk_hdr   hdr;        /* ="data" */
} data_chunk;
 
typedef struct
{
    riff_chunk r;
    fmt_chunk  f;
    auxi_chunk a;
    data_chunk d;
} waveFileHeader;
 
#pragma pack(pop)
 
#endif /* __WAVEHDR_H */
 
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