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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 Mohamed Tarek
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include "rm.h"
#include "cook.h"
//#define DUMP_RAW_FRAMES
#ifndef DEBUGF
# if 0
# define DEBUGF(message,args ...) printf
# else
# define DEBUGF(...)
# endif
#endif
#define DATA_HEADER_SIZE 18 /* size of DATA chunk header in a rm file */
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(char* filename) {
int fd,res;
fd=open(filename,O_CREAT|O_WRONLY|O_TRUNC,S_IRUSR|S_IWUSR);
if (fd >= 0) {
res = write(fd,wav_header,sizeof(wav_header));
}
return(fd);
}
void close_wav(int fd, RMContext *rmctx) {
int x,res;
int filesize;
int bytes_per_sample = 2;
int samples_per_frame = rmctx->samples_pf_pc;
int nb_channels = rmctx->nb_channels;
int sample_rate = rmctx->sample_rate;
int nb_frames = rmctx->audio_framesize/rmctx->block_align * rmctx->nb_packets - 2; // first 2 frames have no valid audio; skipped in output
filesize= samples_per_frame*bytes_per_sample*nb_frames +44;
printf("Filesize = %d\n",filesize);
// 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]=nb_channels;
// Samplerate
wav_header[24]=sample_rate&0xff;
wav_header[25]=(sample_rate&0xff00)>>8;
wav_header[26]=(sample_rate&0xff0000)>>16;
wav_header[27]=(sample_rate&0xff000000)>>24;
// ByteRate
x=sample_rate*bytes_per_sample*nb_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]=rmctx->block_align;//2*rmctx->nb_channels;
// Bits per sample
wav_header[34]=16;
// 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;
lseek(fd,0,SEEK_SET);
res = write(fd,wav_header,sizeof(wav_header));
close(fd);
}
int main(int argc, char *argv[])
{
int fd, fd_dec;
int res, datasize,i;
int nb_frames = 0;
#ifdef DUMP_RAW_FRAMES
char filename[15];
int fd_out;
#endif
int16_t outbuf[2048];
uint16_t fs,sps,h;
uint32_t packet_count;
COOKContext q;
RMContext rmctx;
RMPacket pkt;
memset(&q,0,sizeof(COOKContext));
memset(&rmctx,0,sizeof(RMContext));
memset(&pkt,0,sizeof(RMPacket));
if (argc != 2) {
DEBUGF("Incorrect number of arguments\n");
return -1;
}
fd = open(argv[1],O_RDONLY);
if (fd < 0) {
DEBUGF("Error opening file %s\n", argv[1]);
return -1;
}
/* copy the input rm file to a memory buffer */
uint8_t * filebuf = (uint8_t *)calloc((int)filesize(fd),sizeof(uint8_t));
read(fd,filebuf,filesize(fd));
fd_dec = open_wav("output.wav");
if (fd_dec < 0) {
DEBUGF("Error creating output file\n");
return -1;
}
res = real_parse_header(fd, &rmctx);
packet_count = rmctx.nb_packets;
rmctx.audio_framesize = rmctx.block_align;
rmctx.block_align = rmctx.sub_packet_size;
fs = rmctx.audio_framesize;
sps= rmctx.block_align;
h = rmctx.sub_packet_h;
cook_decode_init(&rmctx,&q);
DEBUGF("nb_frames = %d\n",nb_frames);
/* change the buffer pointer to point at the first audio frame */
advance_buffer(&filebuf, rmctx.data_offset+ DATA_HEADER_SIZE);
while(packet_count)
{
rm_get_packet_membuf(&filebuf, &rmctx, &pkt);
DEBUGF("total frames = %d packet count = %d output counter = %d \n",rmctx.audio_pkt_cnt*(fs/sps), packet_count,rmctx.audio_pkt_cnt);
for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++)
{
/* output raw audio frames that are sent to the decoder into separate files */
#ifdef DUMP_RAW_FRAMES
snprintf(filename,sizeof(filename),"dump%d.raw",++x);
fd_out = open(filename,O_WRONLY|O_CREAT|O_APPEND);
write(fd_out,pkt.frames[i],sps);
close(fd_out);
#endif
nb_frames = cook_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i] , rmctx.block_align);
rmctx.frame_number++;
write(fd_dec,outbuf,datasize);
}
packet_count -= rmctx.audio_pkt_cnt;
rmctx.audio_pkt_cnt = 0;
}
close_wav(fd_dec,&rmctx);
close(fd);
return 0;
}
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