1 /* metaflac - Command-line FLAC metadata editor
2 * Copyright (C) 2001 Josh Coalson
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.
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.
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.
20 * WATCHOUT - this is meant to be very lightweight an not even dependent
21 * on libFLAC, so there are a couple places where FLAC__* variables are
22 * duplicated here. Look for 'DUPLICATE:' in comments.
33 static const char *sync_string_ = "fLaC"; /* DUPLICATE:FLAC__STREAM_SYNC_STRING */
34 static const char *metadata_type_string_[] = { /* DUPLICATE:FLAC__MetaDataTypeString */
40 static int usage(const char *message, ...);
41 static bool list(FILE *f, bool verbose);
42 static uint32 unpack_uint32(byte *b, unsigned bytes);
43 static uint64 unpack_uint64(byte *b, unsigned bytes);
44 static void hexdump(const byte *buf, unsigned bytes);
46 int main(int argc, char *argv[])
49 bool verbose = false, list_mode = true;
55 for(i = 1; i < argc; i++) {
56 if(argv[i][0] != '-' || argv[i][1] == 0)
58 if(0 == strcmp(argv[i], "-l"))
60 else if(0 == strcmp(argv[i], "-v"))
62 else if(0 == strcmp(argv[i], "-v-"))
65 return usage("ERROR: invalid option '%s'\n", argv[i]);
68 if(i + (list_mode? 1:2) != argc)
69 return usage("ERROR: invalid arguments (more/less than %d filename%s?)\n", (list_mode? 1:2), (list_mode? "":"s"));
72 FILE *f = fopen(argv[i], "r");
75 fprintf(stderr, "ERROR opening %s\n", argv[i]);
88 int usage(const char *message, ...)
93 va_start(args, message);
95 (void) vfprintf(stderr, message, args);
100 printf("==============================================================================\n");
101 printf("metaflac - Command-line FLAC metadata editor version %s\n", FLAC__VERSION_STRING);
102 printf("Copyright (C) 2001 Josh Coalson\n");
104 printf("This program is free software; you can redistribute it and/or\n");
105 printf("modify it under the terms of the GNU General Public License\n");
106 printf("as published by the Free Software Foundation; either version 2\n");
107 printf("of the License, or (at your option) any later version.\n");
109 printf("This program is distributed in the hope that it will be useful,\n");
110 printf("but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
111 printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n");
112 printf("GNU General Public License for more details.\n");
114 printf("You should have received a copy of the GNU General Public License\n");
115 printf("along with this program; if not, write to the Free Software\n");
116 printf("Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n");
117 printf("==============================================================================\n");
119 printf(" metaflac [options] infile [outfile]\n");
121 printf("options:\n");
122 printf(" -l : list metadata blocks\n");
123 printf(" -v : verbose\n");
128 bool list(FILE *f, bool verbose)
131 FLAC__StreamMetaData metadata;
132 unsigned blocknum = 0, byte_offset = 0, i;
134 /* read the stream sync code */
135 if(fread(buf, 1, 4, f) < 4 || memcmp(buf, sync_string_, 4)) {
136 fprintf(stderr, "ERROR: not a FLAC file (no '%s' header)\n", sync_string_);
141 /* read the metadata blocks */
143 /* read the metadata block header */
144 if(fread(buf, 1, 4, f) < 4) {
145 fprintf(stderr, "ERROR: short count reading metadata block header\n");
148 metadata.is_last = (buf[0] & 0x80)? true:false;
149 metadata.type = (FLAC__MetaDataType)(buf[0] & 0x7f);
150 metadata.length = unpack_uint32(buf+1, 3);
153 printf("METADATA block #%u\n", blocknum);
154 printf("byte offset: %u\n", byte_offset);
155 printf("type: %u (%s)\n", (unsigned)metadata.type, metadata.type<=FLAC__METADATA_TYPE_APPLICATION? metadata_type_string_[metadata.type] : "UNKNOWN");
156 printf("is last: %s\n", metadata.is_last? "true":"false");
157 printf("length: %u\n", metadata.length);
159 if(metadata.length > sizeof(buf)) {
160 printf("SKIPPING large block\n\n");
164 /* read the metadata block data */
165 if(fread(buf, 1, metadata.length, f) < metadata.length) {
166 fprintf(stderr, "ERROR: short count reading metadata block data\n\n");
169 switch(metadata.type) {
170 case FLAC__METADATA_TYPE_STREAMINFO:
172 metadata.data.stream_info.min_blocksize = unpack_uint32(b, 2); b += 2;
173 metadata.data.stream_info.max_blocksize = unpack_uint32(b, 2); b += 2;
174 metadata.data.stream_info.min_framesize = unpack_uint32(b, 3); b += 3;
175 metadata.data.stream_info.max_framesize = unpack_uint32(b, 3); b += 3;
176 metadata.data.stream_info.sample_rate = (unpack_uint32(b, 2) << 4) | ((unsigned)(b[2] & 0xf0) >> 4);
177 metadata.data.stream_info.channels = (unsigned)((b[2] & 0x0e) >> 1) + 1;
178 metadata.data.stream_info.bits_per_sample = ((((unsigned)(b[2] & 0x01)) << 1) | (((unsigned)(b[3] & 0xf0)) >> 4)) + 1;
179 metadata.data.stream_info.total_samples = (((uint64)(b[3] & 0x0f)) << 32) | unpack_uint64(b+4, 4);
180 memcpy(metadata.data.stream_info.md5sum, b+8, 16);
182 case FLAC__METADATA_TYPE_PADDING:
187 case FLAC__METADATA_TYPE_APPLICATION:
188 memcpy(buf, metadata.data.application.id, 4);
189 metadata.data.application.data = buf+4;
192 printf("SKIPPING block of unknown type\n\n");
197 switch(metadata.type) {
198 case FLAC__METADATA_TYPE_STREAMINFO:
199 printf("minumum blocksize: %u samples\n", metadata.data.stream_info.min_blocksize);
200 printf("maxumum blocksize: %u samples\n", metadata.data.stream_info.max_blocksize);
201 printf("minimum framesize: %u bytes\n", metadata.data.stream_info.min_framesize);
202 printf("maximum framesize: %u bytes\n", metadata.data.stream_info.max_framesize);
203 printf("sample_rate: %u Hz\n", metadata.data.stream_info.sample_rate);
204 printf("channels: %u\n", metadata.data.stream_info.channels);
205 printf("bits-per-sample: %u\n", metadata.data.stream_info.bits_per_sample);
206 printf("total samples: %llu\n", metadata.data.stream_info.total_samples);
207 printf("MD5 signature: ");
208 for(i = 0; i < 16; i++)
209 printf("%02x", metadata.data.stream_info.md5sum[i]);
212 case FLAC__METADATA_TYPE_PADDING:
214 printf("pad contents:\n");
215 hexdump(buf, metadata.length);
218 case FLAC__METADATA_TYPE_APPLICATION:
219 printf("Application ID: ");
220 for(i = 0; i < 4; i++)
221 printf("%02x", metadata.data.application.id[i]);
224 printf("data contents:\n");
225 hexdump(metadata.data.application.data, metadata.length);
232 if(!metadata.is_last)
236 byte_offset += (4 + metadata.length);
237 } while (!metadata.is_last);
242 static uint32 unpack_uint32(byte *b, unsigned bytes)
247 for(i = 0; i < bytes; i++)
248 ret = (ret << 8) | (uint32)(*b++);
253 static uint64 unpack_uint64(byte *b, unsigned bytes)
258 for(i = 0; i < bytes; i++)
259 ret = (ret << 8) | (uint64)(*b++);
264 void hexdump(const byte *buf, unsigned bytes)
266 unsigned i, left = bytes;
269 for(i = 0; i < bytes; i += 16) {
271 "%02X %02X %02X %02X %02X %02X %02X %02X "
272 "%02X %02X %02X %02X %02X %02X %02X %02X "
273 "%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c\n",
275 left > 0? (unsigned char)b[ 0] : 0,
276 left > 1? (unsigned char)b[ 1] : 0,
277 left > 2? (unsigned char)b[ 2] : 0,
278 left > 3? (unsigned char)b[ 3] : 0,
279 left > 4? (unsigned char)b[ 4] : 0,
280 left > 5? (unsigned char)b[ 5] : 0,
281 left > 6? (unsigned char)b[ 6] : 0,
282 left > 7? (unsigned char)b[ 7] : 0,
283 left > 8? (unsigned char)b[ 8] : 0,
284 left > 9? (unsigned char)b[ 9] : 0,
285 left > 10? (unsigned char)b[10] : 0,
286 left > 11? (unsigned char)b[11] : 0,
287 left > 12? (unsigned char)b[12] : 0,
288 left > 13? (unsigned char)b[13] : 0,
289 left > 14? (unsigned char)b[14] : 0,
290 left > 15? (unsigned char)b[15] : 0,
291 (left > 0) ? (isprint(b[ 0]) ? b[ 0] : '.') : ' ',
292 (left > 1) ? (isprint(b[ 1]) ? b[ 1] : '.') : ' ',
293 (left > 2) ? (isprint(b[ 2]) ? b[ 2] : '.') : ' ',
294 (left > 3) ? (isprint(b[ 3]) ? b[ 3] : '.') : ' ',
295 (left > 4) ? (isprint(b[ 4]) ? b[ 4] : '.') : ' ',
296 (left > 5) ? (isprint(b[ 5]) ? b[ 5] : '.') : ' ',
297 (left > 6) ? (isprint(b[ 6]) ? b[ 6] : '.') : ' ',
298 (left > 7) ? (isprint(b[ 7]) ? b[ 7] : '.') : ' ',
299 (left > 8) ? (isprint(b[ 8]) ? b[ 8] : '.') : ' ',
300 (left > 9) ? (isprint(b[ 9]) ? b[ 9] : '.') : ' ',
301 (left > 10) ? (isprint(b[10]) ? b[10] : '.') : ' ',
302 (left > 11) ? (isprint(b[11]) ? b[11] : '.') : ' ',
303 (left > 12) ? (isprint(b[12]) ? b[12] : '.') : ' ',
304 (left > 13) ? (isprint(b[13]) ? b[13] : '.') : ' ',
305 (left > 14) ? (isprint(b[14]) ? b[14] : '.') : ' ',
306 (left > 15) ? (isprint(b[15]) ? b[15] : '.') : ' '