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/*
demac - A Monkey's Audio decoder
$Id$
Copyright (C) Dave Chapman 2007
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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
*/
#include <stdio.h>
#include <inttypes.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include "parser.h"
#ifndef __WIN32__
#define O_BINARY 0
#endif
static unsigned char wav_header[44]={
'R','I','F','F',// 0 - ChunkID
0,0,0,0, // 4 - ChunkSize (filesize-8)
'W','A','V','E',// 8 - Format
'f','m','t',' ',// 12 - SubChunkID
16,0,0,0, // 16 - SubChunk1ID // 16 for PCM
1,0, // 20 - AudioFormat (1=Uncompressed)
2,0, // 22 - NumChannels
0,0,0,0, // 24 - SampleRate in Hz
0,0,0,0, // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8)
4,0, // 32 - BlockAlign (== NumChannels * BitsPerSample/8)
16,0, // 34 - BitsPerSample
'd','a','t','a',// 36 - Subchunk2ID
0,0,0,0 // 40 - Subchunk2Size
};
int open_wav(struct ape_ctx_t* ape_ctx, char* filename)
{
int fd;
int x;
int filesize;
int bytespersample;
fd=open(filename, O_CREAT|O_WRONLY|O_TRUNC|O_BINARY, 0644);
if (fd < 0)
return fd;
bytespersample=ape_ctx->bps/8;
filesize=ape_ctx->totalsamples*bytespersample*ape_ctx->channels+44;
// ChunkSize
x=filesize-8;
wav_header[4]=(x&0xff);
wav_header[5]=(x&0xff00)>>8;
wav_header[6]=(x&0xff0000)>>16;
wav_header[7]=(x&0xff000000)>>24;
// Number of channels
wav_header[22]=ape_ctx->channels;
// Samplerate
wav_header[24]=ape_ctx->samplerate&0xff;
wav_header[25]=(ape_ctx->samplerate&0xff00)>>8;
wav_header[26]=(ape_ctx->samplerate&0xff0000)>>16;
wav_header[27]=(ape_ctx->samplerate&0xff000000)>>24;
// ByteRate
x=ape_ctx->samplerate*(ape_ctx->bps/8)*ape_ctx->channels;
wav_header[28]=(x&0xff);
wav_header[29]=(x&0xff00)>>8;
wav_header[30]=(x&0xff0000)>>16;
wav_header[31]=(x&0xff000000)>>24;
// BlockAlign
wav_header[32]=(ape_ctx->bps/8)*ape_ctx->channels;
// Bits per sample
wav_header[34]=ape_ctx->bps;
// Subchunk2Size
x=filesize-44;
wav_header[40]=(x&0xff);
wav_header[41]=(x&0xff00)>>8;
wav_header[42]=(x&0xff0000)>>16;
wav_header[43]=(x&0xff000000)>>24;
write(fd,wav_header,sizeof(wav_header));
return fd;
}
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