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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)wav.c 1.4 01/10/27 Copyright 1998,1999 Heiko Eissfeldt */
/***
* CopyPolicy: GNU Public License 2 applies
* Copyright (C) by Heiko Eissfeldt
*
*
*/
#include "config.h"
#include <stdio.h>
#include <unixstd.h>
#include "byteorder.h"
#include "sndfile.h"
/***
* ---------------------------------------------------------------------
* definitions for RIFF-output (from windows MMSYSTEM)
* ---------------------------------------------------------------------
*/
typedef unsigned int FOURCC; /* a four character code */
typedef struct CHUNKHDR {
FOURCC ckid; /* chunk ID */
unsigned int dwSize; /* chunk size */
} CHUNKHDR;
/* flags for 'wFormatTag' field of WAVEFORMAT */
#define WAVE_FORMAT_PCM 1
/* specific waveform format structure for PCM data */
typedef struct pcmwaveformat_tag {
unsigned short wFormatTag; /* format type */
unsigned short nChannels; /* number of channels (i.e. mono, stereo, etc.) */
unsigned int nSamplesPerSec; /* sample rate */
unsigned int nAvgBytesPerSec;/* for buffer size estimate */
unsigned short nBlockAlign; /* block size of data */
unsigned short wBitsPerSample;
} PCMWAVEFORMAT;
typedef PCMWAVEFORMAT *PPCMWAVEFORMAT;
/* MMIO macros */
#define mmioFOURCC(ch0, ch1, ch2, ch3) \
((unsigned int)(unsigned char)(ch0) | ((unsigned int)(unsigned char)(ch1) << 8) | \
((unsigned int)(unsigned char)(ch2) << 16) | ((unsigned int)(unsigned char)(ch3) << 24))
#define FOURCC_RIFF mmioFOURCC ('R', 'I', 'F', 'F')
#define FOURCC_LIST mmioFOURCC ('L', 'I', 'S', 'T')
#define FOURCC_WAVE mmioFOURCC ('W', 'A', 'V', 'E')
#define FOURCC_FMT mmioFOURCC ('f', 'm', 't', ' ')
#define FOURCC_DATA mmioFOURCC ('d', 'a', 't', 'a')
/* simplified Header for standard WAV files */
typedef struct WAVEHDR {
CHUNKHDR chkRiff;
FOURCC fccWave;
CHUNKHDR chkFmt;
unsigned short wFormatTag; /* format type */
unsigned short nChannels; /* number of channels (i.e. mono, stereo, etc.) */
unsigned int nSamplesPerSec; /* sample rate */
unsigned int nAvgBytesPerSec;/* for buffer estimation */
unsigned short nBlockAlign; /* block size of data */
unsigned short wBitsPerSample;
CHUNKHDR chkData;
} WAVEHDR;
#define IS_STD_WAV_HEADER(waveHdr) ( \
waveHdr.chkRiff.ckid == FOURCC_RIFF && \
waveHdr.fccWave == FOURCC_WAVE && \
waveHdr.chkFmt.ckid == FOURCC_FMT && \
waveHdr.chkData.ckid == FOURCC_DATA && \
waveHdr.wFormatTag == WAVE_FORMAT_PCM)
static WAVEHDR waveHdr;
static int _InitSound(int audio, long channels, unsigned long rate,
long nBitsPerSample, unsigned long expected_bytes);
static int _InitSound(int audio, long channels, unsigned long rate,
long nBitsPerSample, unsigned long expected_bytes)
{
unsigned long nBlockAlign = channels * ((nBitsPerSample + 7) / 8);
unsigned long nAvgBytesPerSec = nBlockAlign * rate;
unsigned long temp = expected_bytes + sizeof(WAVEHDR) - sizeof(CHUNKHDR);
waveHdr.chkRiff.ckid = cpu_to_le32(FOURCC_RIFF);
waveHdr.fccWave = cpu_to_le32(FOURCC_WAVE);
waveHdr.chkFmt.ckid = cpu_to_le32(FOURCC_FMT);
waveHdr.chkFmt.dwSize = cpu_to_le32(sizeof (PCMWAVEFORMAT));
waveHdr.wFormatTag = cpu_to_le16(WAVE_FORMAT_PCM);
waveHdr.nChannels = cpu_to_le16(channels);
waveHdr.nSamplesPerSec = cpu_to_le32(rate);
waveHdr.nBlockAlign = cpu_to_le16(nBlockAlign);
waveHdr.nAvgBytesPerSec = cpu_to_le32(nAvgBytesPerSec);
waveHdr.wBitsPerSample = cpu_to_le16(nBitsPerSample);
waveHdr.chkData.ckid = cpu_to_le32(FOURCC_DATA);
waveHdr.chkRiff.dwSize = cpu_to_le32(temp);
waveHdr.chkData.dwSize = cpu_to_le32(expected_bytes);
return write (audio, &waveHdr, sizeof (waveHdr));
}
static int _ExitSound(int audio, unsigned long nBytesDone);
static int _ExitSound(int audio, unsigned long nBytesDone)
{
unsigned long temp = nBytesDone + sizeof(WAVEHDR) - sizeof(CHUNKHDR);
waveHdr.chkRiff.dwSize = cpu_to_le32(temp);
waveHdr.chkData.dwSize = cpu_to_le32(nBytesDone);
/* goto beginning */
if (lseek(audio, 0L, SEEK_SET) == -1) {
return 0;
}
return write (audio, &waveHdr, sizeof (waveHdr));
}
static unsigned long _GetHdrSize(void);
static unsigned long _GetHdrSize(void)
{
return sizeof( waveHdr );
}
static unsigned long InSizeToOutSize(unsigned long BytesToDo);
static unsigned long InSizeToOutSize(unsigned long BytesToDo)
{
return BytesToDo;
}
struct soundfile wavsound =
{
_InitSound, /* init header method */
_ExitSound, /* exit header method */
_GetHdrSize, /* report header size method */
/* get sound samples out */
(int (*)(int audio, unsigned char *buf, unsigned long BytesToDo)) write,
InSizeToOutSize, /* compressed? output file size */
0 /* needs big endian samples */
};
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