add --sector-align option
[flac.git] / src / flac / main.c
1 /* flac - Command-line FLAC encoder/decoder
2  * Copyright (C) 2000,2001  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 #include <ctype.h>
20 #include <stdarg.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #ifndef _MSC_VER
25 /* unlink is in stdio.h in VC++ */
26 #include <unistd.h> /* for unlink() */
27 #endif
28 #include "FLAC/all.h"
29 #include "analyze.h"
30 #include "decode.h"
31 #include "encode.h"
32 #include "file.h"
33
34 static int usage(const char *message, ...);
35 static int encode_file(const char *infilename, const char *forced_outfilename, FLAC__bool is_last_file);
36 static int decode_file(const char *infilename, const char *forced_outfilename);
37
38 FLAC__bool verify = false, verbose = true, lax = false, test_only = false, analyze = false;
39 FLAC__bool do_mid_side = true, loose_mid_side = false, do_exhaustive_model_search = false, do_qlp_coeff_prec_search = false;
40 FLAC__bool force_to_stdout = false, delete_input = false, sector_align = false;
41 const char *cmdline_forced_outfilename = 0;
42 analysis_options aopts = { false, false };
43 unsigned padding = 0;
44 unsigned max_lpc_order = 8;
45 unsigned qlp_coeff_precision = 0;
46 FLAC__uint64 skip = 0;
47 int format_is_wave = -1, format_is_big_endian = -1, format_is_unsigned_samples = false;
48 int format_channels = -1, format_bps = -1, format_sample_rate = -1;
49 int blocksize = -1, min_residual_partition_order = -1, max_residual_partition_order = -1, rice_parameter_search_dist = -1;
50 char requested_seek_points[50000]; /* @@@ bad MAGIC NUMBER */
51 int num_requested_seek_points = -1; /* -1 => no -S options were given, 0 => -S- was given */
52 FLAC__int32 align_reservoir_0[588], align_reservoir_1[588]; /* for carrying over samples from --sector-align */
53 FLAC__int32 *align_reservoir[2] = { align_reservoir_0, align_reservoir_1 };
54 unsigned align_reservoir_samples = 0; /* 0 .. 587 */
55
56 int main(int argc, char *argv[])
57 {
58         int i, retval = 0;
59         FLAC__bool mode_decode = false;
60
61         if(argc <= 1)
62                 return usage(0);
63
64         /* get the options */
65         for(i = 1; i < argc; i++) {
66                 if(argv[i][0] != '-' || argv[i][1] == 0)
67                         break;
68                 if(0 == strcmp(argv[i], "-d"))
69                         mode_decode = true;
70                 else if(0 == strcmp(argv[i], "-a")) {
71                         mode_decode = true;
72                         analyze = true;
73                 }
74                 else if(0 == strcmp(argv[i], "-t")) {
75                         mode_decode = true;
76                         test_only = true;
77                 }
78                 else if(0 == strcmp(argv[i], "-c"))
79                         force_to_stdout = true;
80                 else if(0 == strcmp(argv[i], "-s"))
81                         verbose = false;
82                 else if(0 == strcmp(argv[i], "-s-"))
83                         verbose = true;
84                 else if(0 == strcmp(argv[i], "-S")) {
85                         if(num_requested_seek_points < 0)
86                                 num_requested_seek_points = 0;
87                         num_requested_seek_points++;
88                         strcat(requested_seek_points, argv[++i]);
89                         strcat(requested_seek_points, "<");
90                 }
91                 else if(0 == strcmp(argv[i], "-S-")) {
92                         num_requested_seek_points = 0;
93                         requested_seek_points[0] = '\0';
94                 }
95                 else if(0 == strcmp(argv[i], "--delete-input-file"))
96                         delete_input = true;
97                 else if(0 == strcmp(argv[i], "--delete-input-file-"))
98                         delete_input = false;
99                 else if(0 == strcmp(argv[i], "--sector-align"))
100                         sector_align = true;
101                 else if(0 == strcmp(argv[i], "--sector-align-"))
102                         sector_align = false;
103                 else if(0 == strcmp(argv[i], "--skip"))
104                         skip = (FLAC__uint64)atoi(argv[++i]); /* @@@ takes a pretty damn big file to overflow atoi() here, but it could happen */
105                 else if(0 == strcmp(argv[i], "--lax"))
106                         lax = true;
107                 else if(0 == strcmp(argv[i], "--lax-"))
108                         lax = false;
109                 else if(0 == strcmp(argv[i], "-b"))
110                         blocksize = atoi(argv[++i]);
111                 else if(0 == strcmp(argv[i], "-e"))
112                         do_exhaustive_model_search = true;
113                 else if(0 == strcmp(argv[i], "-e-"))
114                         do_exhaustive_model_search = false;
115                 else if(0 == strcmp(argv[i], "-l"))
116                         max_lpc_order = atoi(argv[++i]);
117                 else if(0 == strcmp(argv[i], "-m")) {
118                         do_mid_side = true;
119                         loose_mid_side = false;
120                 }
121                 else if(0 == strcmp(argv[i], "-m-"))
122                         do_mid_side = loose_mid_side = false;
123                 else if(0 == strcmp(argv[i], "-M"))
124                         loose_mid_side = do_mid_side = true;
125                 else if(0 == strcmp(argv[i], "-M-"))
126                         loose_mid_side = do_mid_side = false;
127                 else if(0 == strcmp(argv[i], "-o"))
128                         cmdline_forced_outfilename = argv[++i];
129                 else if(0 == strcmp(argv[i], "-p"))
130                         do_qlp_coeff_prec_search = true;
131                 else if(0 == strcmp(argv[i], "-p-"))
132                         do_qlp_coeff_prec_search = false;
133                 else if(0 == strcmp(argv[i], "-P"))
134                         padding = atoi(argv[++i]);
135                 else if(0 == strcmp(argv[i], "-q"))
136                         qlp_coeff_precision = atoi(argv[++i]);
137                 else if(0 == strcmp(argv[i], "-r")) {
138                         char *p = strchr(argv[++i], ',');
139                         if(0 == p) {
140                                 min_residual_partition_order = 0;
141                                 max_residual_partition_order = atoi(argv[i]);
142                         }
143                         else {
144                                 min_residual_partition_order = atoi(argv[i]);
145                                 max_residual_partition_order = atoi(++p);
146                         }
147                 }
148                 else if(0 == strcmp(argv[i], "-R"))
149                         rice_parameter_search_dist = atoi(argv[++i]);
150                 else if(0 == strcmp(argv[i], "-V"))
151                         verify = true;
152                 else if(0 == strcmp(argv[i], "-V-"))
153                         verify = false;
154                 else if(0 == strcmp(argv[i], "-fb"))
155                         format_is_big_endian = true;
156                 else if(0 == strcmp(argv[i], "-fl"))
157                         format_is_big_endian = false;
158                 else if(0 == strcmp(argv[i], "-fc"))
159                         format_channels = atoi(argv[++i]);
160                 else if(0 == strcmp(argv[i], "-fp"))
161                         format_bps = atoi(argv[++i]);
162                 else if(0 == strcmp(argv[i], "-fs"))
163                         format_sample_rate = atoi(argv[++i]);
164                 else if(0 == strcmp(argv[i], "-fu"))
165                         format_is_unsigned_samples = true;
166                 else if(0 == strcmp(argv[i], "-fr"))
167                         format_is_wave = false;
168                 else if(0 == strcmp(argv[i], "-fw"))
169                         format_is_wave = true;
170                 else if(0 == strcmp(argv[i], "--a-rgp"))
171                         aopts.do_residual_gnuplot = true;
172                 else if(0 == strcmp(argv[i], "--a-rgp-"))
173                         aopts.do_residual_gnuplot = false;
174                 else if(0 == strcmp(argv[i], "--a-rtext"))
175                         aopts.do_residual_text = true;
176                 else if(0 == strcmp(argv[i], "--a-rtext-"))
177                         aopts.do_residual_text = false;
178                 else if(0 == strcmp(argv[i], "-0")) {
179                         do_exhaustive_model_search = false;
180                         do_mid_side = false;
181                         loose_mid_side = false;
182                         qlp_coeff_precision = 0;
183                         min_residual_partition_order = max_residual_partition_order = 2;
184                         rice_parameter_search_dist = 0;
185                         max_lpc_order = 0;
186                 }
187                 else if(0 == strcmp(argv[i], "-1")) {
188                         do_exhaustive_model_search = false;
189                         do_mid_side = true;
190                         loose_mid_side = true;
191                         qlp_coeff_precision = 0;
192                         min_residual_partition_order = max_residual_partition_order = 2;
193                         rice_parameter_search_dist = 0;
194                         max_lpc_order = 0;
195                 }
196                 else if(0 == strcmp(argv[i], "-2")) {
197                         do_exhaustive_model_search = false;
198                         do_mid_side = true;
199                         loose_mid_side = false;
200                         qlp_coeff_precision = 0;
201                         min_residual_partition_order = 0;
202                         max_residual_partition_order = 3;
203                         rice_parameter_search_dist = 0;
204                         max_lpc_order = 0;
205                 }
206                 else if(0 == strcmp(argv[i], "-3")) {
207                         do_exhaustive_model_search = false;
208                         do_mid_side = false;
209                         loose_mid_side = false;
210                         qlp_coeff_precision = 0;
211                         min_residual_partition_order = max_residual_partition_order = 3;
212                         rice_parameter_search_dist = 0;
213                         max_lpc_order = 6;
214                 }
215                 else if(0 == strcmp(argv[i], "-4")) {
216                         do_exhaustive_model_search = false;
217                         do_mid_side = true;
218                         loose_mid_side = true;
219                         qlp_coeff_precision = 0;
220                         min_residual_partition_order = max_residual_partition_order = 3;
221                         rice_parameter_search_dist = 0;
222                         max_lpc_order = 8;
223                 }
224                 else if(0 == strcmp(argv[i], "-5")) {
225                         do_exhaustive_model_search = false;
226                         do_mid_side = true;
227                         loose_mid_side = false;
228                         qlp_coeff_precision = 0;
229                         min_residual_partition_order = max_residual_partition_order = 3;
230                         rice_parameter_search_dist = 0;
231                         max_lpc_order = 8;
232                 }
233                 else if(0 == strcmp(argv[i], "-6")) {
234                         do_exhaustive_model_search = false;
235                         do_mid_side = true;
236                         loose_mid_side = false;
237                         qlp_coeff_precision = 0;
238                         min_residual_partition_order = 0;
239                         max_residual_partition_order = 4;
240                         rice_parameter_search_dist = 0;
241                         max_lpc_order = 8;
242                 }
243                 else if(0 == strcmp(argv[i], "-7")) {
244                         do_exhaustive_model_search = true;
245                         do_mid_side = true;
246                         loose_mid_side = false;
247                         qlp_coeff_precision = 0;
248                         min_residual_partition_order = 0;
249                         max_residual_partition_order = 6;
250                         rice_parameter_search_dist = 0;
251                         max_lpc_order = 8;
252                 }
253                 else if(0 == strcmp(argv[i], "-8")) {
254                         do_exhaustive_model_search = true;
255                         do_mid_side = true;
256                         loose_mid_side = false;
257                         qlp_coeff_precision = 0;
258                         min_residual_partition_order = 0;
259                         max_residual_partition_order = 6;
260                         rice_parameter_search_dist = 0;
261                         max_lpc_order = 12;
262                 }
263                 else if(0 == strcmp(argv[i], "-9")) {
264                         do_exhaustive_model_search = true;
265                         do_mid_side = true;
266                         loose_mid_side = false;
267                         do_qlp_coeff_prec_search = true;
268                         min_residual_partition_order = 0;
269                         max_residual_partition_order = 16;
270                         rice_parameter_search_dist = 0;
271                         max_lpc_order = 32;
272                 }
273                 else if(isdigit((int)(argv[i][1]))) {
274                         return usage("ERROR: compression level '%s' is still reserved\n", argv[i]);
275                 }
276                 else {
277                         return usage("ERROR: invalid option '%s'\n", argv[i]);
278                 }
279         }
280
281         /* tweak options; validate the values */
282         if(!mode_decode) {
283                 if(blocksize < 0) {
284                         if(max_lpc_order == 0)
285                                 blocksize = 1152;
286                         else
287                                 blocksize = 4608;
288                 }
289                 if(max_residual_partition_order < 0) {
290                         if(blocksize <= 1152)
291                                 max_residual_partition_order = 2;
292                         else if(blocksize <= 2304)
293                                 max_residual_partition_order = 3;
294                         else if(blocksize <= 4608)
295                                 max_residual_partition_order = 3;
296                         else
297                                 max_residual_partition_order = 4;
298                         min_residual_partition_order = max_residual_partition_order;
299                 }
300                 if(rice_parameter_search_dist < 0) {
301                         rice_parameter_search_dist = 0;
302                 }
303         }
304         else {
305                 if(test_only) {
306                         if(skip > 0)
307                                 return usage("ERROR: --skip is not allowed in test mode\n");
308                 }
309         }
310
311         FLAC__ASSERT(blocksize >= 0 || mode_decode);
312
313         if(format_channels >= 0) {
314                 if(format_channels == 0 || (unsigned)format_channels > FLAC__MAX_CHANNELS)
315                         return usage("ERROR: invalid number of channels '%u', must be > 0 and <= %u\n", format_channels, FLAC__MAX_CHANNELS);
316         }
317         if(format_bps >= 0) {
318                 if(format_bps != 8 && format_bps != 16 && format_bps != 24)
319                         return usage("ERROR: invalid bits per sample '%u' (must be 8/16/24)\n", format_bps);
320         }
321         if(format_sample_rate >= 0) {
322                 if(format_sample_rate == 0 || (unsigned)format_sample_rate > FLAC__MAX_SAMPLE_RATE)
323                         return usage("ERROR: invalid sample rate '%u', must be > 0 and <= %u\n", format_sample_rate, FLAC__MAX_SAMPLE_RATE);
324         }
325         if(!mode_decode && ((unsigned)blocksize < FLAC__MIN_BLOCK_SIZE || (unsigned)blocksize > FLAC__MAX_BLOCK_SIZE)) {
326                 return usage("ERROR: invalid blocksize '%u', must be >= %u and <= %u\n", (unsigned)blocksize, FLAC__MIN_BLOCK_SIZE, FLAC__MAX_BLOCK_SIZE);
327         }
328         if(qlp_coeff_precision > 0 && qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION) {
329                 return usage("ERROR: invalid value for -q '%u', must be 0 or >= %u\n", qlp_coeff_precision, FLAC__MIN_QLP_COEFF_PRECISION);
330         }
331
332         if(sector_align) {
333                 if(mode_decode)
334                         return usage("ERROR: --sector-align only allowed for encoding\n");
335                 else if(skip > 0)
336                         return usage("ERROR: --sector-align not allowed with --skip\n");
337                 else if(format_channels >= 0 && format_channels != 2)
338                         return usage("ERROR: --sector-align can only be done with stereo input\n");
339                 else if(format_sample_rate >= 0 && format_sample_rate != 2)
340                         return usage("ERROR: --sector-align can only be done with sample rate of 44100\n");
341         }
342
343         if(verbose) {
344                 fprintf(stderr, "\n");
345                 fprintf(stderr, "flac %s, Copyright (C) 2000,2001 Josh Coalson\n", FLAC__VERSION_STRING);
346                 fprintf(stderr, "flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are\n");
347                 fprintf(stderr, "welcome to redistribute it under certain conditions.  Type `flac' for details.\n\n");
348
349                 if(!mode_decode) {
350                         fprintf(stderr, "options:%s%s%s -P %u -b %u%s -l %u%s%s -q %u -r %u,%u -R %u%s\n",
351                                 delete_input?" --delete-input-file":"", sector_align?" --sector-align":"", lax?" --lax":"",
352                                 padding, (unsigned)blocksize, loose_mid_side?" -M":do_mid_side?" -m":"", max_lpc_order,
353                                 do_exhaustive_model_search?" -e":"", do_qlp_coeff_prec_search?" -p":"",
354                                 qlp_coeff_precision,
355                                 (unsigned)min_residual_partition_order, (unsigned)max_residual_partition_order, (unsigned)rice_parameter_search_dist,
356                                 verify? " -V":""
357                         );
358                 }
359         }
360
361         if(mode_decode) {
362                 FLAC__bool first = true;
363                 int save_format;
364
365                 if(i == argc) {
366                         retval = decode_file("-", 0);
367                 }
368                 else {
369                         if(i + 1 != argc)
370                                 cmdline_forced_outfilename = 0;
371                         for(retval = 0; i < argc && retval == 0; i++) {
372                                 if(0 == strcmp(argv[i], "-") && !first)
373                                         continue;
374                                 save_format = format_is_wave;
375                                 retval = decode_file(argv[i], 0);
376                                 format_is_wave = save_format;
377                                 first = false;
378                         }
379                 }
380         }
381         else { /* encode */
382                 FLAC__bool first = true;
383                 int save_format;
384
385                 if(i == argc) {
386                         retval = encode_file("-", 0, true);
387                 }
388                 else {
389                         if(i + 1 != argc)
390                                 cmdline_forced_outfilename = 0;
391                         for(retval = 0; i < argc && retval == 0; i++) {
392                                 if(0 == strcmp(argv[i], "-") && !first)
393                                         continue;
394                                 save_format = format_is_wave;
395                                 retval = encode_file(argv[i], 0, i == (argc-1));
396                                 format_is_wave = save_format;
397                                 first = false;
398                         }
399                 }
400         }
401
402         return retval;
403 }
404
405 int usage(const char *message, ...)
406 {
407         va_list args;
408
409         if(message) {
410                 va_start(args, message);
411
412                 (void) vfprintf(stderr, message, args);
413
414                 va_end(args);
415
416         }
417         fprintf(stderr, "===============================================================================\n");
418         fprintf(stderr, "flac - Command-line FLAC encoder/decoder version %s\n", FLAC__VERSION_STRING);
419         fprintf(stderr, "Copyright (C) 2000,2001  Josh Coalson\n");
420         fprintf(stderr, "\n");
421         fprintf(stderr, "This program is free software; you can redistribute it and/or\n");
422         fprintf(stderr, "modify it under the terms of the GNU General Public License\n");
423         fprintf(stderr, "as published by the Free Software Foundation; either version 2\n");
424         fprintf(stderr, "of the License, or (at your option) any later version.\n");
425         fprintf(stderr, "\n");
426         fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
427         fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
428         fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n");
429         fprintf(stderr, "GNU General Public License for more details.\n");
430         fprintf(stderr, "\n");
431         fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
432         fprintf(stderr, "along with this program; if not, write to the Free Software\n");
433         fprintf(stderr, "Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.\n");
434         fprintf(stderr, "===============================================================================\n");
435         fprintf(stderr, "Usage:\n");
436         fprintf(stderr, "  flac [options] [infile [...]]\n");
437         fprintf(stderr, "\n");
438         fprintf(stderr, "For encoding:\n");
439         fprintf(stderr, "  the input file(s) may be a PCM RIFF WAVE file or raw samples\n");
440         fprintf(stderr, "  the output file(s) will be in FLAC format\n");
441         fprintf(stderr, "For decoding, the reverse is true\n");
442         fprintf(stderr, "\n");
443         fprintf(stderr, "A single 'infile' may be - for stdin.  No 'infile' implies stdin.  Use of\n");
444         fprintf(stderr, "stdin implies -c (write to stdout).  Normally you should use:\n");
445         fprintf(stderr, "   flac [options] -o outfilename  or  flac -d [options] -o outfilename\n");
446         fprintf(stderr, "instead of:\n");
447         fprintf(stderr, "   flac [options] > outfilename   or  flac -d [options] > outfilename\n");
448         fprintf(stderr, "since the former allows flac to seek backwards to write the STREAMINFO or\n");
449         fprintf(stderr, "RIFF WAVE header contents when necessary.\n");
450         fprintf(stderr, "\n");
451         fprintf(stderr, "If the unencoded filename ends with '.wav' or -fw is used, it's assumed to be\n");
452         fprintf(stderr, "RIFF WAVE.  Otherwise, flac will check for the presence of a RIFF header.  If\n");
453         fprintf(stderr, "any infile is raw you must specify the format options {-fb|fl} -fc -fp and -fs,\n");
454         fprintf(stderr, "which will apply to all raw files.  You can force a .wav file to be treated as\n");
455         fprintf(stderr, "a raw file using -fr.\n");
456         fprintf(stderr, "\n");
457         fprintf(stderr, "generic options:\n");
458         fprintf(stderr, "  -d : decode (default behavior is encode)\n");
459         fprintf(stderr, "  -t : test (same as -d except no decoded file is written)\n");
460         fprintf(stderr, "  -a : analyze (same as -d except an analysis file is written)\n");
461         fprintf(stderr, "  -c : write output to stdout\n");
462         fprintf(stderr, "  -s : silent (do not write runtime encode/decode statistics)\n");
463         fprintf(stderr, "  -o filename : force the output file name (usually flac just changes the\n");
464         fprintf(stderr, "                extension)\n");
465         fprintf(stderr, "  --delete-input-file : deletes the input file after a successful encode/decode\n");
466         fprintf(stderr, "  --skip samples : can be used both for encoding and decoding\n");
467         fprintf(stderr, "analyze options:\n");
468         fprintf(stderr, "  --a-rtext : include residual signal in text output\n");
469         fprintf(stderr, "  --a-rgp : generate gnuplot files of residual distribution of each subframe\n");
470         fprintf(stderr, "encoding options:\n");
471         fprintf(stderr, "  --lax : allow encoder to generate non-Subset files\n");
472         fprintf(stderr, "  --sector-align : align encoding of multiple files on sector boundaries\n");
473         fprintf(stderr, "  -S { # | X | #x } : include a point or points in a SEEKTABLE\n");
474         fprintf(stderr, "       #  : a specific sample number for a seek point\n");
475         fprintf(stderr, "       X  : a placeholder point (always goes at the end of the SEEKTABLE)\n");
476         fprintf(stderr, "       #x : # evenly spaced seekpoints, the first being at sample 0\n");
477         fprintf(stderr, "     You may use many -S options; the resulting SEEKTABLE will be the unique-\n");
478         fprintf(stderr, "           ified union of all such values.\n");
479         fprintf(stderr, "     With no -S options, flac defaults to '-S 100x'.  Use -S- for no SEEKTABLE.\n");
480         fprintf(stderr, "     Note: -S #x will not work if the encoder can't determine the input size\n");
481         fprintf(stderr, "           before starting.\n");
482         fprintf(stderr, "     Note: if you use -S # and # is >= samples in the input, there will be\n");
483         fprintf(stderr, "           either no seek point entered (if the input size is determinable\n");
484         fprintf(stderr, "           before encoding starts) or a placeholder point (if input size is not\n");
485         fprintf(stderr, "           determinable)\n");
486         fprintf(stderr, "  -P # : write a PADDING block of # bytes (goes after SEEKTABLE)\n");
487         fprintf(stderr, "         (0 => no PADDING block, default is -P 0)\n");
488         fprintf(stderr, "  -b # : specify blocksize in samples; default is 1152 for -l 0, else 4608;\n");
489         fprintf(stderr, "         must be 192/576/1152/2304/4608/256/512/1024/2048/4096/8192/16384/32768\n");
490         fprintf(stderr, "         (unless --lax is used)\n");
491         fprintf(stderr, "  -m   : try mid-side coding for each frame (stereo input only)\n");
492         fprintf(stderr, "  -M   : loose mid-side coding for all frames (stereo input only)\n");
493         fprintf(stderr, "  -0 .. -9 : fastest compression .. highest compression, default is -5\n");
494         fprintf(stderr, "             these are synonyms for other options:\n");
495         fprintf(stderr, "  -0   : synonymous with -l 0 -b 1152 -r 2,2\n");
496         fprintf(stderr, "  -1   : synonymous with -l 0 -b 1152 -M -r 2,2\n");
497         fprintf(stderr, "  -2   : synonymous with -l 0 -b 1152 -m -r 3\n");
498         fprintf(stderr, "  -3   : synonymous with -l 6 -b 4608 -r 3,3\n");
499         fprintf(stderr, "  -4   : synonymous with -l 8 -b 4608 -M -r 3,3\n");
500         fprintf(stderr, "  -5   : synonymous with -l 8 -b 4608 -m -r 3,3\n");
501         fprintf(stderr, "  -6   : synonymous with -l 8 -b 4608 -m -r 4\n");
502         fprintf(stderr, "  -7   : synonymous with -l 8 -b 4608 -m -e -r 6\n");
503         fprintf(stderr, "  -8   : synonymous with -l 12 -b 4608 -m -e -r 6\n");
504         fprintf(stderr, "  -9   : synonymous with -l 32 -b 4608 -m -e -r 16 -p (very slow!)\n");
505         fprintf(stderr, "  -e   : do exhaustive model search (expensive!)\n");
506         fprintf(stderr, "  -l # : specify max LPC order; 0 => use only fixed predictors\n");
507         fprintf(stderr, "  -p   : do exhaustive search of LP coefficient quantization (expensive!);\n");
508         fprintf(stderr, "         overrides -q, does nothing if using -l 0\n");
509         fprintf(stderr, "  -q # : specify precision in bits of quantized linear-predictor coefficients;\n");
510         fprintf(stderr, "         0 => let encoder decide (min is %u, default is -q 0)\n", FLAC__MIN_QLP_COEFF_PRECISION);
511         fprintf(stderr, "  -r [#,]# : [min,]max residual partition order (# is 0..16; min defaults to 0;\n");
512         fprintf(stderr, "         default is -r 0; above 4 doesn't usually help much)\n");
513         fprintf(stderr, "  -R # : Rice parameter search distance (# is 0..32; above 2 doesn't help much)\n");
514         fprintf(stderr, "  -V   : verify a correct encoding by decoding the output in parallel and\n");
515         fprintf(stderr, "         comparing to the original\n");
516         fprintf(stderr, "  -S-, -m-, -M-, -e-, -p-, -V-, --delete-input-file-, --lax-, --sector-align-\n");
517         fprintf(stderr, "  can all be used to turn off a particular option\n");
518         fprintf(stderr, "format options:\n");
519         fprintf(stderr, "  -fb | -fl : big-endian | little-endian byte order\n");
520         fprintf(stderr, "  -fc channels\n");
521         fprintf(stderr, "  -fp bits_per_sample\n");
522         fprintf(stderr, "  -fs sample_rate : in Hz\n");
523         fprintf(stderr, "  -fu : unsigned samples (default is signed)\n");
524         fprintf(stderr, "  -fr : force to raw format (even if filename ends in .wav)\n");
525         fprintf(stderr, "  -fw : force to RIFF WAVE\n");
526
527         return message? 1 : 0;
528 }
529
530 int encode_file(const char *infilename, const char *forced_outfilename, FLAC__bool is_last_file)
531 {
532         FILE *encode_infile;
533         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
534         char *p;
535         FLAC__byte lookahead[12];
536         unsigned lookahead_length = 0;
537         int retval;
538         long infilesize;
539
540         if(0 == strcmp(infilename, "-")) {
541                 infilesize = -1;
542                 encode_infile = stdin;
543         }
544         else {
545                 infilesize = flac__file_get_filesize(infilename);
546                 if(0 == (encode_infile = fopen(infilename, "rb"))) {
547                         fprintf(stderr, "ERROR: can't open input file %s\n", infilename);
548                         return 1;
549                 }
550         }
551
552         if(sector_align && !format_is_wave && infilesize < 0) {
553                 fprintf(stderr, "ERROR: can't --sector-align when the input size is unknown\n");
554                 return 1;
555         }
556
557         if(format_is_wave < 0) {
558                 /* first set format based on name */
559                 if(0 == strcasecmp(infilename+(strlen(infilename)-4), ".wav"))
560                         format_is_wave = true;
561                 else
562                         format_is_wave = false;
563
564                 /* attempt to guess the file type based on the first 12 bytes */
565                 if((lookahead_length = fread(lookahead, 1, 12, encode_infile)) < 12) {
566                         if(format_is_wave)
567                                 fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
568                         format_is_wave = false;
569                 }
570                 else {
571                         if(strncmp(lookahead, "RIFF", 4) || strncmp(lookahead+8, "WAVE", 4)) {
572                                 if(format_is_wave)
573                                         fprintf(stderr, "WARNING: %s is not a WAVE file, treating as a raw file\n", infilename);
574                                 format_is_wave = false;
575                         }
576                         else
577                                 format_is_wave = true;
578                 }
579         }
580
581         if(!format_is_wave) {
582                 if(format_is_big_endian < 0 || format_channels < 0 || format_bps < 0 || format_sample_rate < 0)
583                         return usage("ERROR: for encoding a raw file you must specify { -fb or -fl }, -fc, -fp, and -fs\n");
584         }
585
586         if(encode_infile == stdin || force_to_stdout)
587                 strcpy(outfilename, "-");
588         else {
589                 strcpy(outfilename, infilename);
590                 if(0 == (p = strrchr(outfilename, '.')))
591                         strcat(outfilename, ".flac");
592                 else {
593                         if(0 == strcmp(p, ".flac"))
594                                 strcpy(p, "_new.flac");
595                         else
596                                 strcpy(p, ".flac");
597                 }
598         }
599         if(0 == forced_outfilename)
600                 forced_outfilename = outfilename;
601         if(0 != cmdline_forced_outfilename)
602                 forced_outfilename = cmdline_forced_outfilename;
603
604         if(format_is_wave)
605                 retval = flac__encode_wav(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, align_reservoir, &align_reservoir_samples, sector_align, is_last_file, verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points);
606         else
607                 retval = flac__encode_raw(encode_infile, infilesize, infilename, forced_outfilename, lookahead, lookahead_length, is_last_file, verbose, skip, verify, lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, min_residual_partition_order, max_residual_partition_order, rice_parameter_search_dist, max_lpc_order, (unsigned)blocksize, qlp_coeff_precision, padding, requested_seek_points, num_requested_seek_points, format_is_big_endian, format_is_unsigned_samples, format_channels, format_bps, format_sample_rate);
608
609         if(retval == 0 && strcmp(infilename, "-")) {
610                 if(strcmp(forced_outfilename, "-"))
611                         flac__file_copy_metadata(infilename, forced_outfilename);
612                 if(delete_input)
613                         unlink(infilename);
614         }
615
616         return 0;
617 }
618
619 int decode_file(const char *infilename, const char *forced_outfilename)
620 {
621         static const char *suffixes[] = { ".wav", ".raw", ".ana" };
622         char outfilename[4096]; /* @@@ bad MAGIC NUMBER */
623         char *p;
624         int retval;
625
626         if(!test_only && !analyze) {
627                 if(format_is_wave < 0) {
628                         format_is_wave = true;
629                 }
630                 if(!format_is_wave) {
631                         if(format_is_big_endian < 0)
632                                 return usage("ERROR: for decoding to a raw file you must specify -fb or -fl\n");
633                 }
634         }
635
636         if(0 == strcmp(infilename, "-") || force_to_stdout)
637                 strcpy(outfilename, "-");
638         else {
639                 const char *suffix = suffixes[analyze? 2 : format_is_wave? 0 : 1];
640                 strcpy(outfilename, infilename);
641                 if(0 == (p = strrchr(outfilename, '.')))
642                         strcat(outfilename, suffix);
643                 else {
644                         if(0 == strcmp(p, suffix)) {
645                                 strcpy(p, "_new");
646                                 strcat(p, suffix);
647                         }
648                         else
649                                 strcpy(p, suffix);
650                 }
651         }
652         if(0 == forced_outfilename)
653                 forced_outfilename = outfilename;
654         if(0 != cmdline_forced_outfilename)
655                 forced_outfilename = cmdline_forced_outfilename;
656
657         if(format_is_wave)
658                 retval = flac__decode_wav(infilename, test_only? 0 : forced_outfilename, analyze, aopts, verbose, skip);
659         else
660                 retval = flac__decode_raw(infilename, test_only? 0 : forced_outfilename, analyze, aopts, verbose, skip, format_is_big_endian, format_is_unsigned_samples);
661
662         if(retval == 0 && strcmp(infilename, "-")) {
663                 if(strcmp(forced_outfilename, "-"))
664                         flac__file_copy_metadata(infilename, forced_outfilename);
665                 if(delete_input)
666                         unlink(infilename);
667         }
668
669         return 0;
670 }