Add log_level_offset to AVCodecContext.
[libav.git] / cmdutils.c
1 /*
2 * Various utilities for command line tools
3 * Copyright (c) 2000-2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <math.h>
26
27 /* Include only the enabled headers since some compilers (namely, Sun
28 Studio) will not omit unused inline functions and create undefined
29 references to libraries that are not being built. */
30
31 #include "config.h"
32 #include "libavformat/avformat.h"
33 #include "libavfilter/avfilter.h"
34 #include "libavdevice/avdevice.h"
35 #include "libswscale/swscale.h"
36 #include "libpostproc/postprocess.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/pixdesc.h"
39 #include "libavcodec/opt.h"
40 #include "cmdutils.h"
41 #include "version.h"
42 #if CONFIG_NETWORK
43 #include "libavformat/network.h"
44 #endif
45 #if HAVE_SYS_RESOURCE_H
46 #include <sys/resource.h>
47 #endif
48
49 const char **opt_names;
50 static int opt_name_count;
51 AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
52 AVFormatContext *avformat_opts;
53 struct SwsContext *sws_opts;
54
55 const int this_year = 2010;
56
57 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
58 {
59 char *tail;
60 const char *error;
61 double d = strtod(numstr, &tail);
62 if (*tail)
63 error= "Expected number for %s but found: %s\n";
64 else if (d < min || d > max)
65 error= "The value for %s was %s which is not within %f - %f\n";
66 else if(type == OPT_INT64 && (int64_t)d != d)
67 error= "Expected int64 for %s but found %s\n";
68 else
69 return d;
70 fprintf(stderr, error, context, numstr, min, max);
71 exit(1);
72 }
73
74 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
75 {
76 int64_t us = parse_date(timestr, is_duration);
77 if (us == INT64_MIN) {
78 fprintf(stderr, "Invalid %s specification for %s: %s\n",
79 is_duration ? "duration" : "date", context, timestr);
80 exit(1);
81 }
82 return us;
83 }
84
85 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
86 {
87 const OptionDef *po;
88 int first;
89
90 first = 1;
91 for(po = options; po->name != NULL; po++) {
92 char buf[64];
93 if ((po->flags & mask) == value) {
94 if (first) {
95 printf("%s", msg);
96 first = 0;
97 }
98 av_strlcpy(buf, po->name, sizeof(buf));
99 if (po->flags & HAS_ARG) {
100 av_strlcat(buf, " ", sizeof(buf));
101 av_strlcat(buf, po->argname, sizeof(buf));
102 }
103 printf("-%-17s %s\n", buf, po->help);
104 }
105 }
106 }
107
108 static const OptionDef* find_option(const OptionDef *po, const char *name){
109 while (po->name != NULL) {
110 if (!strcmp(name, po->name))
111 break;
112 po++;
113 }
114 return po;
115 }
116
117 void parse_options(int argc, char **argv, const OptionDef *options,
118 void (* parse_arg_function)(const char*))
119 {
120 const char *opt, *arg;
121 int optindex, handleoptions=1;
122 const OptionDef *po;
123
124 /* parse options */
125 optindex = 1;
126 while (optindex < argc) {
127 opt = argv[optindex++];
128
129 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
130 int bool_val = 1;
131 if (opt[1] == '-' && opt[2] == '\0') {
132 handleoptions = 0;
133 continue;
134 }
135 opt++;
136 po= find_option(options, opt);
137 if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
138 /* handle 'no' bool option */
139 po = find_option(options, opt + 2);
140 if (!(po->name && (po->flags & OPT_BOOL)))
141 goto unknown_opt;
142 bool_val = 0;
143 }
144 if (!po->name)
145 po= find_option(options, "default");
146 if (!po->name) {
147 unknown_opt:
148 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
149 exit(1);
150 }
151 arg = NULL;
152 if (po->flags & HAS_ARG) {
153 arg = argv[optindex++];
154 if (!arg) {
155 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
156 exit(1);
157 }
158 }
159 if (po->flags & OPT_STRING) {
160 char *str;
161 str = av_strdup(arg);
162 *po->u.str_arg = str;
163 } else if (po->flags & OPT_BOOL) {
164 *po->u.int_arg = bool_val;
165 } else if (po->flags & OPT_INT) {
166 *po->u.int_arg = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
167 } else if (po->flags & OPT_INT64) {
168 *po->u.int64_arg = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
169 } else if (po->flags & OPT_FLOAT) {
170 *po->u.float_arg = parse_number_or_die(opt, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
171 } else if (po->flags & OPT_FUNC2) {
172 if (po->u.func2_arg(opt, arg) < 0) {
173 fprintf(stderr, "%s: failed to set value '%s' for option '%s'\n", argv[0], arg, opt);
174 exit(1);
175 }
176 } else {
177 po->u.func_arg(arg);
178 }
179 if(po->flags & OPT_EXIT)
180 exit(0);
181 } else {
182 if (parse_arg_function)
183 parse_arg_function(opt);
184 }
185 }
186 }
187
188 int opt_default(const char *opt, const char *arg){
189 int type;
190 int ret= 0;
191 const AVOption *o= NULL;
192 int opt_types[]={AV_OPT_FLAG_VIDEO_PARAM, AV_OPT_FLAG_AUDIO_PARAM, 0, AV_OPT_FLAG_SUBTITLE_PARAM, 0};
193
194 for(type=0; type<AVMEDIA_TYPE_NB && ret>= 0; type++){
195 const AVOption *o2 = av_find_opt(avcodec_opts[0], opt, NULL, opt_types[type], opt_types[type]);
196 if(o2)
197 ret = av_set_string3(avcodec_opts[type], opt, arg, 1, &o);
198 }
199 if(!o)
200 ret = av_set_string3(avformat_opts, opt, arg, 1, &o);
201 if(!o && sws_opts)
202 ret = av_set_string3(sws_opts, opt, arg, 1, &o);
203 if(!o){
204 if(opt[0] == 'a')
205 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_AUDIO], opt+1, arg, 1, &o);
206 else if(opt[0] == 'v')
207 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_VIDEO], opt+1, arg, 1, &o);
208 else if(opt[0] == 's')
209 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_SUBTITLE], opt+1, arg, 1, &o);
210 }
211 if (o && ret < 0) {
212 fprintf(stderr, "Invalid value '%s' for option '%s'\n", arg, opt);
213 exit(1);
214 }
215 if (!o) {
216 fprintf(stderr, "Unrecognized option '%s'\n", opt);
217 exit(1);
218 }
219
220 // av_log(NULL, AV_LOG_ERROR, "%s:%s: %f 0x%0X\n", opt, arg, av_get_double(avcodec_opts, opt, NULL), (int)av_get_int(avcodec_opts, opt, NULL));
221
222 //FIXME we should always use avcodec_opts, ... for storing options so there will not be any need to keep track of what i set over this
223 opt_names= av_realloc(opt_names, sizeof(void*)*(opt_name_count+1));
224 opt_names[opt_name_count++]= o->name;
225
226 if(avcodec_opts[0]->debug || avformat_opts->debug)
227 av_log_set_level(AV_LOG_DEBUG);
228 return 0;
229 }
230
231 int opt_loglevel(const char *opt, const char *arg)
232 {
233 const struct { const char *name; int level; } log_levels[] = {
234 { "quiet" , AV_LOG_QUIET },
235 { "panic" , AV_LOG_PANIC },
236 { "fatal" , AV_LOG_FATAL },
237 { "error" , AV_LOG_ERROR },
238 { "warning", AV_LOG_WARNING },
239 { "info" , AV_LOG_INFO },
240 { "verbose", AV_LOG_VERBOSE },
241 { "debug" , AV_LOG_DEBUG },
242 };
243 char *tail;
244 int level;
245 int i;
246
247 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
248 if (!strcmp(log_levels[i].name, arg)) {
249 av_log_set_level(log_levels[i].level);
250 return 0;
251 }
252 }
253
254 level = strtol(arg, &tail, 10);
255 if (*tail) {
256 fprintf(stderr, "Invalid loglevel \"%s\". "
257 "Possible levels are numbers or:\n", arg);
258 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
259 fprintf(stderr, "\"%s\"\n", log_levels[i].name);
260 exit(1);
261 }
262 av_log_set_level(level);
263 return 0;
264 }
265
266 int opt_timelimit(const char *opt, const char *arg)
267 {
268 #if HAVE_SETRLIMIT
269 int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
270 struct rlimit rl = { lim, lim + 1 };
271 if (setrlimit(RLIMIT_CPU, &rl))
272 perror("setrlimit");
273 #else
274 fprintf(stderr, "Warning: -%s not implemented on this OS\n", opt);
275 #endif
276 return 0;
277 }
278
279 void set_context_opts(void *ctx, void *opts_ctx, int flags)
280 {
281 int i;
282 for(i=0; i<opt_name_count; i++){
283 char buf[256];
284 const AVOption *opt;
285 const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
286 /* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
287 if(str && ((opt->flags & flags) == flags))
288 av_set_string3(ctx, opt_names[i], str, 1, NULL);
289 }
290 }
291
292 void print_error(const char *filename, int err)
293 {
294 char errbuf[128];
295 const char *errbuf_ptr = errbuf;
296
297 if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
298 errbuf_ptr = strerror(AVUNERROR(err));
299 fprintf(stderr, "%s: %s\n", filename, errbuf_ptr);
300 }
301
302 #define PRINT_LIB_VERSION(outstream,libname,LIBNAME,indent) \
303 if (CONFIG_##LIBNAME) { \
304 unsigned int version = libname##_version(); \
305 fprintf(outstream, "%slib%-10s %2d.%2d.%2d / %2d.%2d.%2d\n", \
306 indent? " " : "", #libname, \
307 LIB##LIBNAME##_VERSION_MAJOR, \
308 LIB##LIBNAME##_VERSION_MINOR, \
309 LIB##LIBNAME##_VERSION_MICRO, \
310 version >> 16, version >> 8 & 0xff, version & 0xff); \
311 }
312
313 static void print_all_lib_versions(FILE* outstream, int indent)
314 {
315 PRINT_LIB_VERSION(outstream, avutil, AVUTIL, indent);
316 PRINT_LIB_VERSION(outstream, avcodec, AVCODEC, indent);
317 PRINT_LIB_VERSION(outstream, avformat, AVFORMAT, indent);
318 PRINT_LIB_VERSION(outstream, avdevice, AVDEVICE, indent);
319 PRINT_LIB_VERSION(outstream, avfilter, AVFILTER, indent);
320 PRINT_LIB_VERSION(outstream, swscale, SWSCALE, indent);
321 PRINT_LIB_VERSION(outstream, postproc, POSTPROC, indent);
322 }
323
324 static void maybe_print_config(const char *lib, const char *cfg)
325 {
326 static int warned_cfg;
327
328 if (strcmp(FFMPEG_CONFIGURATION, cfg)) {
329 if (!warned_cfg) {
330 fprintf(stderr, " WARNING: library configuration mismatch\n");
331 warned_cfg = 1;
332 }
333 fprintf(stderr, " %-11s configuration: %s\n", lib, cfg);
334 }
335 }
336
337 #define PRINT_LIB_CONFIG(lib, tag, cfg) do { \
338 if (CONFIG_##lib) \
339 maybe_print_config(tag, cfg); \
340 } while (0)
341
342 void show_banner(void)
343 {
344 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-%d the FFmpeg developers\n",
345 program_name, program_birth_year, this_year);
346 fprintf(stderr, " built on %s %s with %s %s\n",
347 __DATE__, __TIME__, CC_TYPE, CC_VERSION);
348 fprintf(stderr, " configuration: " FFMPEG_CONFIGURATION "\n");
349 PRINT_LIB_CONFIG(AVUTIL, "libavutil", avutil_configuration());
350 PRINT_LIB_CONFIG(AVCODEC, "libavcodec", avcodec_configuration());
351 PRINT_LIB_CONFIG(AVFORMAT, "libavformat", avformat_configuration());
352 PRINT_LIB_CONFIG(AVDEVICE, "libavdevice", avdevice_configuration());
353 PRINT_LIB_CONFIG(AVFILTER, "libavfilter", avfilter_configuration());
354 PRINT_LIB_CONFIG(SWSCALE, "libswscale", swscale_configuration());
355 PRINT_LIB_CONFIG(POSTPROC, "libpostproc", postproc_configuration());
356 print_all_lib_versions(stderr, 1);
357 }
358
359 void show_version(void) {
360 printf("%s " FFMPEG_VERSION "\n", program_name);
361 print_all_lib_versions(stdout, 0);
362 }
363
364 void show_license(void)
365 {
366 printf(
367 #if CONFIG_NONFREE
368 "This version of %s has nonfree parts compiled in.\n"
369 "Therefore it is not legally redistributable.\n",
370 program_name
371 #elif CONFIG_GPLV3
372 "%s is free software; you can redistribute it and/or modify\n"
373 "it under the terms of the GNU General Public License as published by\n"
374 "the Free Software Foundation; either version 3 of the License, or\n"
375 "(at your option) any later version.\n"
376 "\n"
377 "%s is distributed in the hope that it will be useful,\n"
378 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
379 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
380 "GNU General Public License for more details.\n"
381 "\n"
382 "You should have received a copy of the GNU General Public License\n"
383 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
384 program_name, program_name, program_name
385 #elif CONFIG_GPL
386 "%s is free software; you can redistribute it and/or modify\n"
387 "it under the terms of the GNU General Public License as published by\n"
388 "the Free Software Foundation; either version 2 of the License, or\n"
389 "(at your option) any later version.\n"
390 "\n"
391 "%s is distributed in the hope that it will be useful,\n"
392 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
393 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
394 "GNU General Public License for more details.\n"
395 "\n"
396 "You should have received a copy of the GNU General Public License\n"
397 "along with %s; if not, write to the Free Software\n"
398 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
399 program_name, program_name, program_name
400 #elif CONFIG_LGPLV3
401 "%s is free software; you can redistribute it and/or modify\n"
402 "it under the terms of the GNU Lesser General Public License as published by\n"
403 "the Free Software Foundation; either version 3 of the License, or\n"
404 "(at your option) any later version.\n"
405 "\n"
406 "%s is distributed in the hope that it will be useful,\n"
407 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
408 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
409 "GNU Lesser General Public License for more details.\n"
410 "\n"
411 "You should have received a copy of the GNU Lesser General Public License\n"
412 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
413 program_name, program_name, program_name
414 #else
415 "%s is free software; you can redistribute it and/or\n"
416 "modify it under the terms of the GNU Lesser General Public\n"
417 "License as published by the Free Software Foundation; either\n"
418 "version 2.1 of the License, or (at your option) any later version.\n"
419 "\n"
420 "%s is distributed in the hope that it will be useful,\n"
421 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
422 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
423 "Lesser General Public License for more details.\n"
424 "\n"
425 "You should have received a copy of the GNU Lesser General Public\n"
426 "License along with %s; if not, write to the Free Software\n"
427 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
428 program_name, program_name, program_name
429 #endif
430 );
431 }
432
433 void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts)
434 {
435 int i;
436 char fmt_str[128];
437 for (i=-1; i < nb_fmts; i++) {
438 get_fmt_string (fmt_str, sizeof(fmt_str), i);
439 fprintf(stdout, "%s\n", fmt_str);
440 }
441 }
442
443 void show_formats(void)
444 {
445 AVInputFormat *ifmt=NULL;
446 AVOutputFormat *ofmt=NULL;
447 const char *last_name;
448
449 printf(
450 "File formats:\n"
451 " D. = Demuxing supported\n"
452 " .E = Muxing supported\n"
453 " --\n");
454 last_name= "000";
455 for(;;){
456 int decode=0;
457 int encode=0;
458 const char *name=NULL;
459 const char *long_name=NULL;
460
461 while((ofmt= av_oformat_next(ofmt))) {
462 if((name == NULL || strcmp(ofmt->name, name)<0) &&
463 strcmp(ofmt->name, last_name)>0){
464 name= ofmt->name;
465 long_name= ofmt->long_name;
466 encode=1;
467 }
468 }
469 while((ifmt= av_iformat_next(ifmt))) {
470 if((name == NULL || strcmp(ifmt->name, name)<0) &&
471 strcmp(ifmt->name, last_name)>0){
472 name= ifmt->name;
473 long_name= ifmt->long_name;
474 encode=0;
475 }
476 if(name && strcmp(ifmt->name, name)==0)
477 decode=1;
478 }
479 if(name==NULL)
480 break;
481 last_name= name;
482
483 printf(
484 " %s%s %-15s %s\n",
485 decode ? "D":" ",
486 encode ? "E":" ",
487 name,
488 long_name ? long_name:" ");
489 }
490 }
491
492 void show_codecs(void)
493 {
494 AVCodec *p=NULL, *p2;
495 const char *last_name;
496 printf(
497 "Codecs:\n"
498 " D..... = Decoding supported\n"
499 " .E.... = Encoding supported\n"
500 " ..V... = Video codec\n"
501 " ..A... = Audio codec\n"
502 " ..S... = Subtitle codec\n"
503 " ...S.. = Supports draw_horiz_band\n"
504 " ....D. = Supports direct rendering method 1\n"
505 " .....T = Supports weird frame truncation\n"
506 " ------\n");
507 last_name= "000";
508 for(;;){
509 int decode=0;
510 int encode=0;
511 int cap=0;
512 const char *type_str;
513
514 p2=NULL;
515 while((p= av_codec_next(p))) {
516 if((p2==NULL || strcmp(p->name, p2->name)<0) &&
517 strcmp(p->name, last_name)>0){
518 p2= p;
519 decode= encode= cap=0;
520 }
521 if(p2 && strcmp(p->name, p2->name)==0){
522 if(p->decode) decode=1;
523 if(p->encode) encode=1;
524 cap |= p->capabilities;
525 }
526 }
527 if(p2==NULL)
528 break;
529 last_name= p2->name;
530
531 switch(p2->type) {
532 case AVMEDIA_TYPE_VIDEO:
533 type_str = "V";
534 break;
535 case AVMEDIA_TYPE_AUDIO:
536 type_str = "A";
537 break;
538 case AVMEDIA_TYPE_SUBTITLE:
539 type_str = "S";
540 break;
541 default:
542 type_str = "?";
543 break;
544 }
545 printf(
546 " %s%s%s%s%s%s %-15s %s",
547 decode ? "D": (/*p2->decoder ? "d":*/" "),
548 encode ? "E":" ",
549 type_str,
550 cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S":" ",
551 cap & CODEC_CAP_DR1 ? "D":" ",
552 cap & CODEC_CAP_TRUNCATED ? "T":" ",
553 p2->name,
554 p2->long_name ? p2->long_name : "");
555 /* if(p2->decoder && decode==0)
556 printf(" use %s for decoding", p2->decoder->name);*/
557 printf("\n");
558 }
559 printf("\n");
560 printf(
561 "Note, the names of encoders and decoders do not always match, so there are\n"
562 "several cases where the above table shows encoder only or decoder only entries\n"
563 "even though both encoding and decoding are supported. For example, the h263\n"
564 "decoder corresponds to the h263 and h263p encoders, for file formats it is even\n"
565 "worse.\n");
566 }
567
568 void show_bsfs(void)
569 {
570 AVBitStreamFilter *bsf=NULL;
571
572 printf("Bitstream filters:\n");
573 while((bsf = av_bitstream_filter_next(bsf)))
574 printf("%s\n", bsf->name);
575 printf("\n");
576 }
577
578 void show_protocols(void)
579 {
580 URLProtocol *up=NULL;
581
582 printf("Supported file protocols:\n");
583 while((up = av_protocol_next(up)))
584 printf("%s\n", up->name);
585 }
586
587 void show_filters(void)
588 {
589 AVFilter av_unused(**filter) = NULL;
590
591 printf("Filters:\n");
592 #if CONFIG_AVFILTER
593 while ((filter = av_filter_next(filter)) && *filter)
594 printf("%-16s %s\n", (*filter)->name, (*filter)->description);
595 #endif
596 }
597
598 void show_pix_fmts(void)
599 {
600 enum PixelFormat pix_fmt;
601
602 printf(
603 "Pixel formats:\n"
604 "I.... = Supported Input format for conversion\n"
605 ".O... = Supported Output format for conversion\n"
606 "..H.. = Hardware accelerated format\n"
607 "...P. = Paletted format\n"
608 "....B = Bitstream format\n"
609 "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
610 "-----\n");
611
612 #if !CONFIG_SWSCALE
613 # define sws_isSupportedInput(x) 0
614 # define sws_isSupportedOutput(x) 0
615 #endif
616
617 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++) {
618 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
619 printf("%c%c%c%c%c %-16s %d %2d\n",
620 sws_isSupportedInput (pix_fmt) ? 'I' : '.',
621 sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
622 pix_desc->flags & PIX_FMT_HWACCEL ? 'H' : '.',
623 pix_desc->flags & PIX_FMT_PAL ? 'P' : '.',
624 pix_desc->flags & PIX_FMT_BITSTREAM ? 'B' : '.',
625 pix_desc->name,
626 pix_desc->nb_components,
627 av_get_bits_per_pixel(pix_desc));
628 }
629 }
630
631 int read_yesno(void)
632 {
633 int c = getchar();
634 int yesno = (toupper(c) == 'Y');
635
636 while (c != '\n' && c != EOF)
637 c = getchar();
638
639 return yesno;
640 }
641
642 int read_file(const char *filename, char **bufptr, size_t *size)
643 {
644 FILE *f = fopen(filename, "r");
645
646 if (!f) {
647 fprintf(stderr, "Cannot read file '%s': %s\n", filename, strerror(errno));
648 return AVERROR(errno);
649 }
650 fseek(f, 0, SEEK_END);
651 *size = ftell(f);
652 fseek(f, 0, SEEK_SET);
653 *bufptr = av_malloc(*size + 1);
654 if (!*bufptr) {
655 fprintf(stderr, "Could not allocate file buffer\n");
656 fclose(f);
657 return AVERROR(ENOMEM);
658 }
659 fread(*bufptr, 1, *size, f);
660 (*bufptr)[*size++] = '\0';
661
662 fclose(f);
663 return 0;
664 }