configure: simplify some OS-specific flag setting
[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 "libavutil/eval.h"
40 #include "libavcodec/opt.h"
41 #include "cmdutils.h"
42 #include "version.h"
43 #if CONFIG_NETWORK
44 #include "libavformat/network.h"
45 #endif
46 #if HAVE_SYS_RESOURCE_H
47 #include <sys/resource.h>
48 #endif
49
50 const char **opt_names;
51 static int opt_name_count;
52 AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
53 AVFormatContext *avformat_opts;
54 struct SwsContext *sws_opts;
55
56 const int this_year = 2010;
57
58 double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
59 {
60 char *tail;
61 const char *error;
62 double d = av_strtod(numstr, &tail);
63 if (*tail)
64 error= "Expected number for %s but found: %s\n";
65 else if (d < min || d > max)
66 error= "The value for %s was %s which is not within %f - %f\n";
67 else if(type == OPT_INT64 && (int64_t)d != d)
68 error= "Expected int64 for %s but found %s\n";
69 else
70 return d;
71 fprintf(stderr, error, context, numstr, min, max);
72 exit(1);
73 }
74
75 int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
76 {
77 int64_t us = parse_date(timestr, is_duration);
78 if (us == INT64_MIN) {
79 fprintf(stderr, "Invalid %s specification for %s: %s\n",
80 is_duration ? "duration" : "date", context, timestr);
81 exit(1);
82 }
83 return us;
84 }
85
86 void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
87 {
88 const OptionDef *po;
89 int first;
90
91 first = 1;
92 for(po = options; po->name != NULL; po++) {
93 char buf[64];
94 if ((po->flags & mask) == value) {
95 if (first) {
96 printf("%s", msg);
97 first = 0;
98 }
99 av_strlcpy(buf, po->name, sizeof(buf));
100 if (po->flags & HAS_ARG) {
101 av_strlcat(buf, " ", sizeof(buf));
102 av_strlcat(buf, po->argname, sizeof(buf));
103 }
104 printf("-%-17s %s\n", buf, po->help);
105 }
106 }
107 }
108
109 static const OptionDef* find_option(const OptionDef *po, const char *name){
110 while (po->name != NULL) {
111 if (!strcmp(name, po->name))
112 break;
113 po++;
114 }
115 return po;
116 }
117
118 void parse_options(int argc, char **argv, const OptionDef *options,
119 void (* parse_arg_function)(const char*))
120 {
121 const char *opt, *arg;
122 int optindex, handleoptions=1;
123 const OptionDef *po;
124
125 /* parse options */
126 optindex = 1;
127 while (optindex < argc) {
128 opt = argv[optindex++];
129
130 if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
131 int bool_val = 1;
132 if (opt[1] == '-' && opt[2] == '\0') {
133 handleoptions = 0;
134 continue;
135 }
136 opt++;
137 po= find_option(options, opt);
138 if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
139 /* handle 'no' bool option */
140 po = find_option(options, opt + 2);
141 if (!(po->name && (po->flags & OPT_BOOL)))
142 goto unknown_opt;
143 bool_val = 0;
144 }
145 if (!po->name)
146 po= find_option(options, "default");
147 if (!po->name) {
148 unknown_opt:
149 fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
150 exit(1);
151 }
152 arg = NULL;
153 if (po->flags & HAS_ARG) {
154 arg = argv[optindex++];
155 if (!arg) {
156 fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
157 exit(1);
158 }
159 }
160 if (po->flags & OPT_STRING) {
161 char *str;
162 str = av_strdup(arg);
163 *po->u.str_arg = str;
164 } else if (po->flags & OPT_BOOL) {
165 *po->u.int_arg = bool_val;
166 } else if (po->flags & OPT_INT) {
167 *po->u.int_arg = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
168 } else if (po->flags & OPT_INT64) {
169 *po->u.int64_arg = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
170 } else if (po->flags & OPT_FLOAT) {
171 *po->u.float_arg = parse_number_or_die(opt, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
172 } else if (po->flags & OPT_FUNC2) {
173 if (po->u.func2_arg(opt, arg) < 0) {
174 fprintf(stderr, "%s: failed to set value '%s' for option '%s'\n", argv[0], arg, opt);
175 exit(1);
176 }
177 } else {
178 po->u.func_arg(arg);
179 }
180 if(po->flags & OPT_EXIT)
181 exit(0);
182 } else {
183 if (parse_arg_function)
184 parse_arg_function(opt);
185 }
186 }
187 }
188
189 int opt_default(const char *opt, const char *arg){
190 int type;
191 int ret= 0;
192 const AVOption *o= NULL;
193 int opt_types[]={AV_OPT_FLAG_VIDEO_PARAM, AV_OPT_FLAG_AUDIO_PARAM, 0, AV_OPT_FLAG_SUBTITLE_PARAM, 0};
194
195 for(type=0; type<AVMEDIA_TYPE_NB && ret>= 0; type++){
196 const AVOption *o2 = av_find_opt(avcodec_opts[0], opt, NULL, opt_types[type], opt_types[type]);
197 if(o2)
198 ret = av_set_string3(avcodec_opts[type], opt, arg, 1, &o);
199 }
200 if(!o)
201 ret = av_set_string3(avformat_opts, opt, arg, 1, &o);
202 if(!o && sws_opts)
203 ret = av_set_string3(sws_opts, opt, arg, 1, &o);
204 if(!o){
205 if(opt[0] == 'a')
206 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_AUDIO], opt+1, arg, 1, &o);
207 else if(opt[0] == 'v')
208 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_VIDEO], opt+1, arg, 1, &o);
209 else if(opt[0] == 's')
210 ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_SUBTITLE], opt+1, arg, 1, &o);
211 }
212 if (o && ret < 0) {
213 fprintf(stderr, "Invalid value '%s' for option '%s'\n", arg, opt);
214 exit(1);
215 }
216 if (!o) {
217 fprintf(stderr, "Unrecognized option '%s'\n", opt);
218 exit(1);
219 }
220
221 // 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));
222
223 //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
224 opt_names= av_realloc(opt_names, sizeof(void*)*(opt_name_count+1));
225 opt_names[opt_name_count++]= o->name;
226
227 if(avcodec_opts[0]->debug || avformat_opts->debug)
228 av_log_set_level(AV_LOG_DEBUG);
229 return 0;
230 }
231
232 int opt_loglevel(const char *opt, const char *arg)
233 {
234 const struct { const char *name; int level; } log_levels[] = {
235 { "quiet" , AV_LOG_QUIET },
236 { "panic" , AV_LOG_PANIC },
237 { "fatal" , AV_LOG_FATAL },
238 { "error" , AV_LOG_ERROR },
239 { "warning", AV_LOG_WARNING },
240 { "info" , AV_LOG_INFO },
241 { "verbose", AV_LOG_VERBOSE },
242 { "debug" , AV_LOG_DEBUG },
243 };
244 char *tail;
245 int level;
246 int i;
247
248 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
249 if (!strcmp(log_levels[i].name, arg)) {
250 av_log_set_level(log_levels[i].level);
251 return 0;
252 }
253 }
254
255 level = strtol(arg, &tail, 10);
256 if (*tail) {
257 fprintf(stderr, "Invalid loglevel \"%s\". "
258 "Possible levels are numbers or:\n", arg);
259 for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
260 fprintf(stderr, "\"%s\"\n", log_levels[i].name);
261 exit(1);
262 }
263 av_log_set_level(level);
264 return 0;
265 }
266
267 int opt_timelimit(const char *opt, const char *arg)
268 {
269 #if HAVE_SETRLIMIT
270 int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
271 struct rlimit rl = { lim, lim + 1 };
272 if (setrlimit(RLIMIT_CPU, &rl))
273 perror("setrlimit");
274 #else
275 fprintf(stderr, "Warning: -%s not implemented on this OS\n", opt);
276 #endif
277 return 0;
278 }
279
280 void set_context_opts(void *ctx, void *opts_ctx, int flags)
281 {
282 int i;
283 for(i=0; i<opt_name_count; i++){
284 char buf[256];
285 const AVOption *opt;
286 const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
287 /* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
288 if(str && ((opt->flags & flags) == flags))
289 av_set_string3(ctx, opt_names[i], str, 1, NULL);
290 }
291 }
292
293 void print_error(const char *filename, int err)
294 {
295 char errbuf[128];
296 const char *errbuf_ptr = errbuf;
297
298 if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
299 errbuf_ptr = strerror(AVUNERROR(err));
300 fprintf(stderr, "%s: %s\n", filename, errbuf_ptr);
301 }
302
303 #define PRINT_LIB_VERSION(outstream,libname,LIBNAME,indent) \
304 if (CONFIG_##LIBNAME) { \
305 unsigned int version = libname##_version(); \
306 fprintf(outstream, "%slib%-10s %2d.%2d.%2d / %2d.%2d.%2d\n", \
307 indent? " " : "", #libname, \
308 LIB##LIBNAME##_VERSION_MAJOR, \
309 LIB##LIBNAME##_VERSION_MINOR, \
310 LIB##LIBNAME##_VERSION_MICRO, \
311 version >> 16, version >> 8 & 0xff, version & 0xff); \
312 }
313
314 static void print_all_lib_versions(FILE* outstream, int indent)
315 {
316 PRINT_LIB_VERSION(outstream, avutil, AVUTIL, indent);
317 PRINT_LIB_VERSION(outstream, avcodec, AVCODEC, indent);
318 PRINT_LIB_VERSION(outstream, avformat, AVFORMAT, indent);
319 PRINT_LIB_VERSION(outstream, avdevice, AVDEVICE, indent);
320 PRINT_LIB_VERSION(outstream, avfilter, AVFILTER, indent);
321 PRINT_LIB_VERSION(outstream, swscale, SWSCALE, indent);
322 PRINT_LIB_VERSION(outstream, postproc, POSTPROC, indent);
323 }
324
325 static void maybe_print_config(const char *lib, const char *cfg)
326 {
327 static int warned_cfg;
328
329 if (strcmp(FFMPEG_CONFIGURATION, cfg)) {
330 if (!warned_cfg) {
331 fprintf(stderr, " WARNING: library configuration mismatch\n");
332 warned_cfg = 1;
333 }
334 fprintf(stderr, " %-11s configuration: %s\n", lib, cfg);
335 }
336 }
337
338 #define PRINT_LIB_CONFIG(lib, tag, cfg) do { \
339 if (CONFIG_##lib) \
340 maybe_print_config(tag, cfg); \
341 } while (0)
342
343 void show_banner(void)
344 {
345 fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-%d the FFmpeg developers\n",
346 program_name, program_birth_year, this_year);
347 fprintf(stderr, " built on %s %s with %s %s\n",
348 __DATE__, __TIME__, CC_TYPE, CC_VERSION);
349 fprintf(stderr, " configuration: " FFMPEG_CONFIGURATION "\n");
350 PRINT_LIB_CONFIG(AVUTIL, "libavutil", avutil_configuration());
351 PRINT_LIB_CONFIG(AVCODEC, "libavcodec", avcodec_configuration());
352 PRINT_LIB_CONFIG(AVFORMAT, "libavformat", avformat_configuration());
353 PRINT_LIB_CONFIG(AVDEVICE, "libavdevice", avdevice_configuration());
354 PRINT_LIB_CONFIG(AVFILTER, "libavfilter", avfilter_configuration());
355 PRINT_LIB_CONFIG(SWSCALE, "libswscale", swscale_configuration());
356 PRINT_LIB_CONFIG(POSTPROC, "libpostproc", postproc_configuration());
357 print_all_lib_versions(stderr, 1);
358 }
359
360 void show_version(void) {
361 printf("%s " FFMPEG_VERSION "\n", program_name);
362 print_all_lib_versions(stdout, 0);
363 }
364
365 void show_license(void)
366 {
367 printf(
368 #if CONFIG_NONFREE
369 "This version of %s has nonfree parts compiled in.\n"
370 "Therefore it is not legally redistributable.\n",
371 program_name
372 #elif CONFIG_GPLV3
373 "%s is free software; you can redistribute it and/or modify\n"
374 "it under the terms of the GNU General Public License as published by\n"
375 "the Free Software Foundation; either version 3 of the License, or\n"
376 "(at your option) any later version.\n"
377 "\n"
378 "%s is distributed in the hope that it will be useful,\n"
379 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
380 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
381 "GNU General Public License for more details.\n"
382 "\n"
383 "You should have received a copy of the GNU General Public License\n"
384 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
385 program_name, program_name, program_name
386 #elif CONFIG_GPL
387 "%s is free software; you can redistribute it and/or modify\n"
388 "it under the terms of the GNU General Public License as published by\n"
389 "the Free Software Foundation; either version 2 of the License, or\n"
390 "(at your option) any later version.\n"
391 "\n"
392 "%s is distributed in the hope that it will be useful,\n"
393 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
394 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
395 "GNU General Public License for more details.\n"
396 "\n"
397 "You should have received a copy of the GNU General Public License\n"
398 "along with %s; if not, write to the Free Software\n"
399 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
400 program_name, program_name, program_name
401 #elif CONFIG_LGPLV3
402 "%s is free software; you can redistribute it and/or modify\n"
403 "it under the terms of the GNU Lesser General Public License as published by\n"
404 "the Free Software Foundation; either version 3 of the License, or\n"
405 "(at your option) any later version.\n"
406 "\n"
407 "%s is distributed in the hope that it will be useful,\n"
408 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
409 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
410 "GNU Lesser General Public License for more details.\n"
411 "\n"
412 "You should have received a copy of the GNU Lesser General Public License\n"
413 "along with %s. If not, see <http://www.gnu.org/licenses/>.\n",
414 program_name, program_name, program_name
415 #else
416 "%s is free software; you can redistribute it and/or\n"
417 "modify it under the terms of the GNU Lesser General Public\n"
418 "License as published by the Free Software Foundation; either\n"
419 "version 2.1 of the License, or (at your option) any later version.\n"
420 "\n"
421 "%s is distributed in the hope that it will be useful,\n"
422 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
423 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
424 "Lesser General Public License for more details.\n"
425 "\n"
426 "You should have received a copy of the GNU Lesser General Public\n"
427 "License along with %s; if not, write to the Free Software\n"
428 "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
429 program_name, program_name, program_name
430 #endif
431 );
432 }
433
434 void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts)
435 {
436 int i;
437 char fmt_str[128];
438 for (i=-1; i < nb_fmts; i++) {
439 get_fmt_string (fmt_str, sizeof(fmt_str), i);
440 fprintf(stdout, "%s\n", fmt_str);
441 }
442 }
443
444 void show_formats(void)
445 {
446 AVInputFormat *ifmt=NULL;
447 AVOutputFormat *ofmt=NULL;
448 const char *last_name;
449
450 printf(
451 "File formats:\n"
452 " D. = Demuxing supported\n"
453 " .E = Muxing supported\n"
454 " --\n");
455 last_name= "000";
456 for(;;){
457 int decode=0;
458 int encode=0;
459 const char *name=NULL;
460 const char *long_name=NULL;
461
462 while((ofmt= av_oformat_next(ofmt))) {
463 if((name == NULL || strcmp(ofmt->name, name)<0) &&
464 strcmp(ofmt->name, last_name)>0){
465 name= ofmt->name;
466 long_name= ofmt->long_name;
467 encode=1;
468 }
469 }
470 while((ifmt= av_iformat_next(ifmt))) {
471 if((name == NULL || strcmp(ifmt->name, name)<0) &&
472 strcmp(ifmt->name, last_name)>0){
473 name= ifmt->name;
474 long_name= ifmt->long_name;
475 encode=0;
476 }
477 if(name && strcmp(ifmt->name, name)==0)
478 decode=1;
479 }
480 if(name==NULL)
481 break;
482 last_name= name;
483
484 printf(
485 " %s%s %-15s %s\n",
486 decode ? "D":" ",
487 encode ? "E":" ",
488 name,
489 long_name ? long_name:" ");
490 }
491 }
492
493 void show_codecs(void)
494 {
495 AVCodec *p=NULL, *p2;
496 const char *last_name;
497 printf(
498 "Codecs:\n"
499 " D..... = Decoding supported\n"
500 " .E.... = Encoding supported\n"
501 " ..V... = Video codec\n"
502 " ..A... = Audio codec\n"
503 " ..S... = Subtitle codec\n"
504 " ...S.. = Supports draw_horiz_band\n"
505 " ....D. = Supports direct rendering method 1\n"
506 " .....T = Supports weird frame truncation\n"
507 " ------\n");
508 last_name= "000";
509 for(;;){
510 int decode=0;
511 int encode=0;
512 int cap=0;
513 const char *type_str;
514
515 p2=NULL;
516 while((p= av_codec_next(p))) {
517 if((p2==NULL || strcmp(p->name, p2->name)<0) &&
518 strcmp(p->name, last_name)>0){
519 p2= p;
520 decode= encode= cap=0;
521 }
522 if(p2 && strcmp(p->name, p2->name)==0){
523 if(p->decode) decode=1;
524 if(p->encode) encode=1;
525 cap |= p->capabilities;
526 }
527 }
528 if(p2==NULL)
529 break;
530 last_name= p2->name;
531
532 switch(p2->type) {
533 case AVMEDIA_TYPE_VIDEO:
534 type_str = "V";
535 break;
536 case AVMEDIA_TYPE_AUDIO:
537 type_str = "A";
538 break;
539 case AVMEDIA_TYPE_SUBTITLE:
540 type_str = "S";
541 break;
542 default:
543 type_str = "?";
544 break;
545 }
546 printf(
547 " %s%s%s%s%s%s %-15s %s",
548 decode ? "D": (/*p2->decoder ? "d":*/" "),
549 encode ? "E":" ",
550 type_str,
551 cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S":" ",
552 cap & CODEC_CAP_DR1 ? "D":" ",
553 cap & CODEC_CAP_TRUNCATED ? "T":" ",
554 p2->name,
555 p2->long_name ? p2->long_name : "");
556 /* if(p2->decoder && decode==0)
557 printf(" use %s for decoding", p2->decoder->name);*/
558 printf("\n");
559 }
560 printf("\n");
561 printf(
562 "Note, the names of encoders and decoders do not always match, so there are\n"
563 "several cases where the above table shows encoder only or decoder only entries\n"
564 "even though both encoding and decoding are supported. For example, the h263\n"
565 "decoder corresponds to the h263 and h263p encoders, for file formats it is even\n"
566 "worse.\n");
567 }
568
569 void show_bsfs(void)
570 {
571 AVBitStreamFilter *bsf=NULL;
572
573 printf("Bitstream filters:\n");
574 while((bsf = av_bitstream_filter_next(bsf)))
575 printf("%s\n", bsf->name);
576 printf("\n");
577 }
578
579 void show_protocols(void)
580 {
581 URLProtocol *up=NULL;
582
583 printf("Supported file protocols:\n");
584 while((up = av_protocol_next(up)))
585 printf("%s\n", up->name);
586 }
587
588 void show_filters(void)
589 {
590 AVFilter av_unused(**filter) = NULL;
591
592 printf("Filters:\n");
593 #if CONFIG_AVFILTER
594 while ((filter = av_filter_next(filter)) && *filter)
595 printf("%-16s %s\n", (*filter)->name, (*filter)->description);
596 #endif
597 }
598
599 void show_pix_fmts(void)
600 {
601 enum PixelFormat pix_fmt;
602
603 printf(
604 "Pixel formats:\n"
605 "I.... = Supported Input format for conversion\n"
606 ".O... = Supported Output format for conversion\n"
607 "..H.. = Hardware accelerated format\n"
608 "...P. = Paletted format\n"
609 "....B = Bitstream format\n"
610 "FLAGS NAME NB_COMPONENTS BITS_PER_PIXEL\n"
611 "-----\n");
612
613 #if !CONFIG_SWSCALE
614 # define sws_isSupportedInput(x) 0
615 # define sws_isSupportedOutput(x) 0
616 #endif
617
618 for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++) {
619 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
620 printf("%c%c%c%c%c %-16s %d %2d\n",
621 sws_isSupportedInput (pix_fmt) ? 'I' : '.',
622 sws_isSupportedOutput(pix_fmt) ? 'O' : '.',
623 pix_desc->flags & PIX_FMT_HWACCEL ? 'H' : '.',
624 pix_desc->flags & PIX_FMT_PAL ? 'P' : '.',
625 pix_desc->flags & PIX_FMT_BITSTREAM ? 'B' : '.',
626 pix_desc->name,
627 pix_desc->nb_components,
628 av_get_bits_per_pixel(pix_desc));
629 }
630 }
631
632 int read_yesno(void)
633 {
634 int c = getchar();
635 int yesno = (toupper(c) == 'Y');
636
637 while (c != '\n' && c != EOF)
638 c = getchar();
639
640 return yesno;
641 }
642
643 int read_file(const char *filename, char **bufptr, size_t *size)
644 {
645 FILE *f = fopen(filename, "rb");
646
647 if (!f) {
648 fprintf(stderr, "Cannot read file '%s': %s\n", filename, strerror(errno));
649 return AVERROR(errno);
650 }
651 fseek(f, 0, SEEK_END);
652 *size = ftell(f);
653 fseek(f, 0, SEEK_SET);
654 *bufptr = av_malloc(*size + 1);
655 if (!*bufptr) {
656 fprintf(stderr, "Could not allocate file buffer\n");
657 fclose(f);
658 return AVERROR(ENOMEM);
659 }
660 fread(*bufptr, 1, *size, f);
661 (*bufptr)[*size++] = '\0';
662
663 fclose(f);
664 return 0;
665 }