520274219a
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13562 a1c6a512-1295-4272-9138-f99709370657
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
|
|
|
|
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"
|
|
|
|
|
|
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=creat(filename,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;
|
|
}
|