apps/codecs/libcook/main.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2009 Mohamed Tarek
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include <stdint.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #include <unistd.h>
  26 #include <string.h>
  27
  28 #include "../librm/rm.h"
  29 #include "cook.h"
  30
  31 //#define DUMP_RAW_FRAMES
  32
  33 #define DATA_HEADER_SIZE 18 /* size of DATA chunk header in a rm file */
  34 static unsigned char wav_header[44]={
  35     'R','I','F','F',//  0 - ChunkID
  36     0,0,0,0,        //  4 - ChunkSize (filesize-8)
  37     'W','A','V','E',//  8 - Format
  38     'f','m','t',' ',// 12 - SubChunkID
  39     16,0,0,0,       // 16 - SubChunk1ID  // 16 for PCM
  40     1,0,            // 20 - AudioFormat (1=Uncompressed)
  41     2,0,            // 22 - NumChannels
  42     0,0,0,0,        // 24 - SampleRate in Hz
  43     0,0,0,0,        // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8)
  44     4,0,            // 32 - BlockAlign (== NumChannels * BitsPerSample/8)
  45     16,0,           // 34 - BitsPerSample
  46     'd','a','t','a',// 36 - Subchunk2ID
  47     0,0,0,0         // 40 - Subchunk2Size
  48 };
  49
  50 int open_wav(char* filename) {
  51     int fd,res;
  52
  53     fd=open(filename,O_CREAT|O_WRONLY|O_TRUNC,S_IRUSR|S_IWUSR);
  54     if (fd >= 0) {
  55         res = write(fd,wav_header,sizeof(wav_header));
  56     }
  57
  58     return(fd);
  59 }
  60
  61 void close_wav(int fd, RMContext *rmctx, COOKContext *q) {
  62     int x,res;
  63     int filesize;
  64     int bytes_per_sample = 2;
  65     int samples_per_frame = q->samples_per_frame;
  66     int nb_channels = rmctx->nb_channels;
  67     int sample_rate = rmctx->sample_rate;
  68     int nb_frames = rmctx->audio_framesize/rmctx->block_align * rmctx->nb_packets - 2; // first 2 frames have no valid audio; skipped in output
  69
  70     filesize= samples_per_frame*bytes_per_sample*nb_frames +44;
  71     printf("Filesize = %d\n",filesize);
  72
  73     // ChunkSize
  74     x=filesize-8;
  75     wav_header[4]=(x&0xff);
  76     wav_header[5]=(x&0xff00)>>8;
  77     wav_header[6]=(x&0xff0000)>>16;
  78     wav_header[7]=(x&0xff000000)>>24;
  79
  80     // Number of channels
  81     wav_header[22]=nb_channels;
  82
  83     // Samplerate
  84     wav_header[24]=sample_rate&0xff;
  85     wav_header[25]=(sample_rate&0xff00)>>8;
  86     wav_header[26]=(sample_rate&0xff0000)>>16;
  87     wav_header[27]=(sample_rate&0xff000000)>>24;
  88
  89     // ByteRate
  90     x=sample_rate*bytes_per_sample*nb_channels;
  91     wav_header[28]=(x&0xff);
  92     wav_header[29]=(x&0xff00)>>8;
  93     wav_header[30]=(x&0xff0000)>>16;
  94     wav_header[31]=(x&0xff000000)>>24;
  95
  96     // BlockAlign
  97     wav_header[32]=rmctx->block_align;//2*rmctx->nb_channels;
  98
  99     // Bits per sample
 100     wav_header[34]=16;
 101
 102     // Subchunk2Size
 103     x=filesize-44;
 104     wav_header[40]=(x&0xff);
 105     wav_header[41]=(x&0xff00)>>8;
 106     wav_header[42]=(x&0xff0000)>>16;
 107     wav_header[43]=(x&0xff000000)>>24;
 108
 109     lseek(fd,0,SEEK_SET);
 110     res = write(fd,wav_header,sizeof(wav_header));
 111     close(fd);
 112 }
 113
 114 int main(int argc, char *argv[])
 115 {
 116     int fd, fd_dec;
 117     int res, datasize,i;
 118     int nb_frames = 0;
 119 #ifdef DUMP_RAW_FRAMES
 120     char filename[15];
 121     int fd_out;
 122 #endif
 123     int32_t outbuf[2048];
 124     uint16_t fs,sps,h;
 125     uint32_t packet_count;
 126     COOKContext q;
 127     RMContext rmctx;
 128     RMPacket pkt;
 129
 130     memset(&q,0,sizeof(COOKContext));
 131     memset(&rmctx,0,sizeof(RMContext));
 132     memset(&pkt,0,sizeof(RMPacket));
 133
 134     if (argc != 2) {
 135         DEBUGF("Incorrect number of arguments\n");
 136         return -1;
 137     }
 138
 139     fd = open(argv[1],O_RDONLY);
 140     if (fd < 0) {
 141         DEBUGF("Error opening file %s\n", argv[1]);
 142         return -1;
 143     }
 144
 145     /* copy the input rm file to a memory buffer */
 146     uint8_t * filebuf = (uint8_t *)calloc((int)filesize(fd),sizeof(uint8_t));
 147     res = read(fd,filebuf,filesize(fd));
 148
 149     fd_dec = open_wav("output.wav");
 150     if (fd_dec < 0) {
 151         DEBUGF("Error creating output file\n");
 152         return -1;
 153     }
 154     res = real_parse_header(fd, &rmctx);
 155     packet_count = rmctx.nb_packets;
 156     rmctx.audio_framesize = rmctx.block_align;
 157     rmctx.block_align = rmctx.sub_packet_size;
 158     fs = rmctx.audio_framesize;
 159     sps= rmctx.block_align;
 160     h = rmctx.sub_packet_h;
 161     cook_decode_init(&rmctx,&q);
 162
 163     /* change the buffer pointer to point at the first audio frame */
 164     advance_buffer(&filebuf, rmctx.data_offset+ DATA_HEADER_SIZE);
 165     while(packet_count)
 166     {
 167         rm_get_packet(&filebuf, &rmctx, &pkt);
 168         //DEBUGF("total frames = %d packet count = %d output counter = %d \n",rmctx.audio_pkt_cnt*(fs/sps), packet_count,rmctx.audio_pkt_cnt);
 169         for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++)
 170         {
 171             /* output raw audio frames that are sent to the decoder into separate files */
 172 #ifdef DUMP_RAW_FRAMES
 173               snprintf(filename,sizeof(filename),"dump%d.raw",++x);
 174               fd_out = open(filename,O_WRONLY|O_CREAT|O_APPEND);
 175               write(fd_out,pkt.frames[i],sps);
 176               close(fd_out);
 177 #endif
 178             nb_frames = cook_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i] , rmctx.block_align);
 179             rmctx.frame_number++;
 180             res = write(fd_dec,outbuf,datasize);
 181         }
 182         packet_count -= rmctx.audio_pkt_cnt;
 183         rmctx.audio_pkt_cnt = 0;
 184     }
 185     close_wav(fd_dec, &rmctx, &q);
 186     close(fd);
 187
 188
 189   return 0;
 190 }