release/src/router/flac/src/flac/iffscan.c

   1 /* iffscan - Simple AIFF/RIFF chunk scanner
   2  * Copyright (C) 2007  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #if HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #if defined _MSC_VER || defined __MINGW32__
  27 #include <sys/types.h> /* for off_t */
  28 #if _MSC_VER <= 1600 /* @@@ [2G limit] */
  29 #define fseeko fseek
  30 #define ftello ftell
  31 #endif
  32 #endif
  33 #include "foreign_metadata.h"
  34
  35 static FLAC__uint32 unpack32be_(const FLAC__byte *b)
  36 {
  37         return ((FLAC__uint32)b[0]<<24) + ((FLAC__uint32)b[1]<<16) + ((FLAC__uint32)b[2]<<8) + (FLAC__uint32)b[3];
  38 }
  39
  40 static FLAC__uint32 unpack32le_(const FLAC__byte *b)
  41 {
  42         return (FLAC__uint32)b[0] + ((FLAC__uint32)b[1]<<8) + ((FLAC__uint32)b[2]<<16) + ((FLAC__uint32)b[3]<<24);
  43 }
  44
  45 static FLAC__uint32 unpack32_(const FLAC__byte *b, foreign_block_type_t type)
  46 {
  47         if(type == FOREIGN_BLOCK_TYPE__AIFF)
  48                 return unpack32be_(b);
  49         else
  50                 return unpack32le_(b);
  51 }
  52
  53 int main(int argc, char *argv[])
  54 {
  55         FILE *f;
  56         char buf[12];
  57         foreign_metadata_t *fm;
  58         const char *fn, *error;
  59         size_t i;
  60         FLAC__uint32 size;
  61
  62         if(argc != 2) {
  63                 fprintf(stderr, "usage: %s { file.wav | file.aif }\n", argv[0]);
  64                 return 1;
  65         }
  66         fn = argv[1];
  67         if(0 == (f = fopen(fn, "rb")) || fread(buf, 1, 4, f) != 4) {
  68                 fprintf(stderr, "ERROR opening %s for reading\n", fn);
  69                 return 1;
  70         }
  71         fclose(f);
  72         if(0 == (fm = flac__foreign_metadata_new(memcmp(buf, "RIFF", 4)? FOREIGN_BLOCK_TYPE__AIFF : FOREIGN_BLOCK_TYPE__RIFF))) {
  73                 fprintf(stderr, "ERROR: out of memory\n");
  74                 return 1;
  75         }
  76         if(fm->type == FOREIGN_BLOCK_TYPE__AIFF) {
  77                 if(!flac__foreign_metadata_read_from_aiff(fm, fn, &error)) {
  78                         fprintf(stderr, "ERROR reading chunks from %s: %s\n", fn, error);
  79                         return 1;
  80                 }
  81         }
  82         else {
  83                 if(!flac__foreign_metadata_read_from_wave(fm, fn, &error)) {
  84                         fprintf(stderr, "ERROR reading chunks from %s: %s\n", fn, error);
  85                         return 1;
  86                 }
  87         }
  88         if(0 == (f = fopen(fn, "rb"))) {
  89                 fprintf(stderr, "ERROR opening %s for reading\n", fn);
  90                 return 1;
  91         }
  92         for(i = 0; i < fm->num_blocks; i++) {
  93                 if(fseeko(f, fm->blocks[i].offset, SEEK_SET) < 0) {
  94                         fprintf(stderr, "ERROR seeking in %s\n", fn);
  95                         return 1;
  96                 }
  97                 if(fread(buf, 1, 12, f) != 12) {
  98                         fprintf(stderr, "ERROR reading %s\n", fn);
  99                         return 1;
 100                 }
 101                 size = unpack32_((const FLAC__byte*)buf+4, fm->type);
 102                 printf("block:[%c%c%c%c] size=%08x=(%10u)", buf[0], buf[1], buf[2], buf[3], size, size);
 103                 if(i == 0)
 104                         printf(" type:[%c%c%c%c]", buf[8], buf[9], buf[10], buf[11]);
 105                 else if(fm->type == FOREIGN_BLOCK_TYPE__AIFF && i == fm->audio_block)
 106                         printf(" offset size=%08x=(%10u)", fm->ssnd_offset_size, fm->ssnd_offset_size);
 107                 printf("\n");
 108         }
 109         fclose(f);
 110         flac__foreign_metadata_delete(fm);
 111         return 0;
 112 }