summaryrefslogtreecommitdiffstats
path: root/cmdutils.c
blob: 2349b7052e49b361c29150328db400c6dd890198 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
/*
 * Various utilities for command line tools
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>

/* Include only the enabled headers since some compilers (namely, Sun
   Studio) will not omit unused inline functions and create undefined
   references to libraries that are not being built. */

#include "config.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libpostproc/postprocess.h"
#include "libavutil/avstring.h"
#include "libavutil/pixdesc.h"
#include "libavcodec/opt.h"
#include "cmdutils.h"
#include "version.h"
#if CONFIG_NETWORK
#include "libavformat/network.h"
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif

const char **opt_names;
static int opt_name_count;
AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
AVFormatContext *avformat_opts;
struct SwsContext *sws_opts;

const int this_year = 2010;

double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max)
{
    char *tail;
    const char *error;
    double d = strtod(numstr, &tail);
    if (*tail)
        error= "Expected number for %s but found: %s\n";
    else if (d < min || d > max)
        error= "The value for %s was %s which is not within %f - %f\n";
    else if(type == OPT_INT64 && (int64_t)d != d)
        error= "Expected int64 for %s but found %s\n";
    else
        return d;
    fprintf(stderr, error, context, numstr, min, max);
    exit(1);
}

int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration)
{
    int64_t us = parse_date(timestr, is_duration);
    if (us == INT64_MIN) {
        fprintf(stderr, "Invalid %s specification for %s: %s\n",
                is_duration ? "duration" : "date", context, timestr);
        exit(1);
    }
    return us;
}

void show_help_options(const OptionDef *options, const char *msg, int mask, int value)
{
    const OptionDef *po;
    int first;

    first = 1;
    for(po = options; po->name != NULL; po++) {
        char buf[64];
        if ((po->flags & mask) == value) {
            if (first) {
                printf("%s", msg);
                first = 0;
            }
            av_strlcpy(buf, po->name, sizeof(buf));
            if (po->flags & HAS_ARG) {
                av_strlcat(buf, " ", sizeof(buf));
                av_strlcat(buf, po->argname, sizeof(buf));
            }
            printf("-%-17s  %s\n", buf, po->help);
        }
    }
}

static const OptionDef* find_option(const OptionDef *po, const char *name){
    while (po->name != NULL) {
        if (!strcmp(name, po->name))
            break;
        po++;
    }
    return po;
}

void parse_options(int argc, char **argv, const OptionDef *options,
                   void (* parse_arg_function)(const char*))
{
    const char *opt, *arg;
    int optindex, handleoptions=1;
    const OptionDef *po;

    /* parse options */
    optindex = 1;
    while (optindex < argc) {
        opt = argv[optindex++];

        if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
            int bool_val = 1;
            if (opt[1] == '-' && opt[2] == '\0') {
                handleoptions = 0;
                continue;
            }
            opt++;
            po= find_option(options, opt);
            if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
                /* handle 'no' bool option */
                po = find_option(options, opt + 2);
                if (!(po->name && (po->flags & OPT_BOOL)))
                    goto unknown_opt;
                bool_val = 0;
            }
            if (!po->name)
                po= find_option(options, "default");
            if (!po->name) {
unknown_opt:
                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
                exit(1);
            }
            arg = NULL;
            if (po->flags & HAS_ARG) {
                arg = argv[optindex++];
                if (!arg) {
                    fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
                    exit(1);
                }
            }
            if (po->flags & OPT_STRING) {
                char *str;
                str = av_strdup(arg);
                *po->u.str_arg = str;
            } else if (po->flags & OPT_BOOL) {
                *po->u.int_arg = bool_val;
            } else if (po->flags & OPT_INT) {
                *po->u.int_arg = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
            } else if (po->flags & OPT_INT64) {
                *po->u.int64_arg = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
            } else if (po->flags & OPT_FLOAT) {
                *po->u.float_arg = parse_number_or_die(opt, arg, OPT_FLOAT, -1.0/0.0, 1.0/0.0);
            } else if (po->flags & OPT_FUNC2) {
                if (po->u.func2_arg(opt, arg) < 0) {
                    fprintf(stderr, "%s: failed to set value '%s' for option '%s'\n", argv[0], arg, opt);
                    exit(1);
                }
            } else {
                po->u.func_arg(arg);
            }
            if(po->flags & OPT_EXIT)
                exit(0);
        } else {
            if (parse_arg_function)
                parse_arg_function(opt);
        }
    }
}

int opt_default(const char *opt, const char *arg){
    int type;
    int ret= 0;
    const AVOption *o= NULL;
    int opt_types[]={AV_OPT_FLAG_VIDEO_PARAM, AV_OPT_FLAG_AUDIO_PARAM, 0, AV_OPT_FLAG_SUBTITLE_PARAM, 0};

    for(type=0; type<AVMEDIA_TYPE_NB && ret>= 0; type++){
        const AVOption *o2 = av_find_opt(avcodec_opts[0], opt, NULL, opt_types[type], opt_types[type]);
        if(o2)
            ret = av_set_string3(avcodec_opts[type], opt, arg, 1, &o);
    }
    if(!o)
        ret = av_set_string3(avformat_opts, opt, arg, 1, &o);
    if(!o && sws_opts)
        ret = av_set_string3(sws_opts, opt, arg, 1, &o);
    if(!o){
        if(opt[0] == 'a')
            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_AUDIO], opt+1, arg, 1, &o);
        else if(opt[0] == 'v')
            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_VIDEO], opt+1, arg, 1, &o);
        else if(opt[0] == 's')
            ret = av_set_string3(avcodec_opts[AVMEDIA_TYPE_SUBTITLE], opt+1, arg, 1, &o);
    }
    if (o && ret < 0) {
        fprintf(stderr, "Invalid value '%s' for option '%s'\n", arg, opt);
        exit(1);
    }
    if (!o) {
        fprintf(stderr, "Unrecognized option '%s'\n", opt);
        exit(1);
    }

//    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));

    //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
    opt_names= av_realloc(opt_names, sizeof(void*)*(opt_name_count+1));
    opt_names[opt_name_count++]= o->name;

    if(avcodec_opts[0]->debug || avformat_opts->debug)
        av_log_set_level(AV_LOG_DEBUG);
    return 0;
}

int opt_loglevel(const char *opt, const char *arg)
{
    const struct { const char *name; int level; } log_levels[] = {
        { "quiet"  , AV_LOG_QUIET   },
        { "panic"  , AV_LOG_PANIC   },
        { "fatal"  , AV_LOG_FATAL   },
        { "error"  , AV_LOG_ERROR   },
        { "warning", AV_LOG_WARNING },
        { "info"   , AV_LOG_INFO    },
        { "verbose", AV_LOG_VERBOSE },
        { "debug"  , AV_LOG_DEBUG   },
    };
    char *tail;
    int level;
    int i;

    for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++) {
        if (!strcmp(log_levels[i].name, arg)) {
            av_log_set_level(log_levels[i].level);
            return 0;
        }
    }

    level = strtol(arg, &tail, 10);
    if (*tail) {
        fprintf(stderr, "Invalid loglevel \"%s\". "
                        "Possible levels are numbers or:\n", arg);
        for (i = 0; i < FF_ARRAY_ELEMS(log_levels); i++)
            fprintf(stderr, "\"%s\"\n", log_levels[i].name);
        exit(1);
    }
    av_log_set_level(level);
    return 0;
}

int opt_timelimit(const char *opt, const char *arg)
{
#if HAVE_SETRLIMIT
    int lim = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
    struct rlimit rl = { lim, lim + 1 };
    if (setrlimit(RLIMIT_CPU, &rl))
        perror("setrlimit");
#else
    fprintf(stderr, "Warning: -%s not implemented on this OS\n", opt);
#endif
    return 0;
}

void set_context_opts(void *ctx, void *opts_ctx, int flags)
{
    int i;
    for(i=0; i<opt_name_count; i++){
        char buf[256];
        const AVOption *opt;
        const char *str= av_get_string(opts_ctx, opt_names[i], &opt, buf, sizeof(buf));
        /* if an option with name opt_names[i] is present in opts_ctx then str is non-NULL */
        if(str && ((opt->flags & flags) == flags))
            av_set_string3(ctx, opt_names[i], str, 1, NULL);
    }
}

void print_error(const char *filename, int err)
{
    char errbuf[128];
    const char *errbuf_ptr = errbuf;

    if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
        errbuf_ptr = strerror(AVUNERROR(err));
    fprintf(stderr, "%s: %s\n", filename, errbuf_ptr);
}

#define PRINT_LIB_VERSION(outstream,libname,LIBNAME,indent)             \
    if (CONFIG_##LIBNAME) {                                             \
        unsigned int version = libname##_version();                     \
        fprintf(outstream, "%slib%-10s %2d.%2d.%2d / %2d.%2d.%2d\n",    \
                indent? "  " : "", #libname,                            \
                LIB##LIBNAME##_VERSION_MAJOR,                           \
                LIB##LIBNAME##_VERSION_MINOR,                           \
                LIB##LIBNAME##_VERSION_MICRO,                           \
                version >> 16, version >> 8 & 0xff, version & 0xff);    \
    }

static void print_all_lib_versions(FILE* outstream, int indent)
{
    PRINT_LIB_VERSION(outstream, avutil,   AVUTIL,   indent);
    PRINT_LIB_VERSION(outstream, avcodec,  AVCODEC,  indent);
    PRINT_LIB_VERSION(outstream, avformat, AVFORMAT, indent);
    PRINT_LIB_VERSION(outstream, avdevice, AVDEVICE, indent);
    PRINT_LIB_VERSION(outstream, avfilter, AVFILTER, indent);
    PRINT_LIB_VERSION(outstream, swscale,  SWSCALE,  indent);
    PRINT_LIB_VERSION(outstream, postproc, POSTPROC, indent);
}

static void maybe_print_config(const char *lib, const char *cfg)
{
    static int warned_cfg;

    if (strcmp(FFMPEG_CONFIGURATION, cfg)) {
        if (!warned_cfg) {
            fprintf(stderr, "  WARNING: library configuration mismatch\n");
            warned_cfg = 1;
        }
        fprintf(stderr, "  %-11s configuration: %s\n", lib, cfg);
    }
}

#define PRINT_LIB_CONFIG(lib, tag, cfg) do {    \
        if (CONFIG_##lib)                       \
            maybe_print_config(tag, cfg);       \
    } while (0)

void show_banner(void)
{
    fprintf(stderr, "%s version " FFMPEG_VERSION ", Copyright (c) %d-%d the FFmpeg developers\n",
            program_name, program_birth_year, this_year);
    fprintf(stderr, "  built on %s %s with %s %s\n",
            __DATE__, __TIME__, CC_TYPE, CC_VERSION);
    fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
    PRINT_LIB_CONFIG(AVUTIL,   "libavutil",   avutil_configuration());
    PRINT_LIB_CONFIG(AVCODEC,  "libavcodec",  avcodec_configuration());
    PRINT_LIB_CONFIG(AVFORMAT, "libavformat", avformat_configuration());
    PRINT_LIB_CONFIG(AVDEVICE, "libavdevice", avdevice_configuration());
    PRINT_LIB_CONFIG(AVFILTER, "libavfilter", avfilter_configuration());
    PRINT_LIB_CONFIG(SWSCALE,  "libswscale",  swscale_configuration());
    PRINT_LIB_CONFIG(POSTPROC, "libpostproc", postproc_configuration());
    print_all_lib_versions(stderr, 1);
}

void show_version(void) {
    printf("%s " FFMPEG_VERSION "\n", program_name);
    print_all_lib_versions(stdout, 0);
}

void show_license(void)
{
    printf(
#if CONFIG_NONFREE
    "This version of %s has nonfree parts compiled in.\n"
    "Therefore it is not legally redistributable.\n",
    program_name
#elif CONFIG_GPLV3
    "%s is free software; you can redistribute it and/or modify\n"
    "it under the terms of the GNU General Public License as published by\n"
    "the Free Software Foundation; either version 3 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "%s is distributed in the hope that it will be useful,\n"
    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
    "GNU General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU General Public License\n"
    "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
    program_name, program_name, program_name
#elif CONFIG_GPL
    "%s is free software; you can redistribute it and/or modify\n"
    "it under the terms of the GNU General Public License as published by\n"
    "the Free Software Foundation; either version 2 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "%s is distributed in the hope that it will be useful,\n"
    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
    "GNU General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU General Public License\n"
    "along with %s; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
    program_name, program_name, program_name
#elif CONFIG_LGPLV3
    "%s is free software; you can redistribute it and/or modify\n"
    "it under the terms of the GNU Lesser General Public License as published by\n"
    "the Free Software Foundation; either version 3 of the License, or\n"
    "(at your option) any later version.\n"
    "\n"
    "%s is distributed in the hope that it will be useful,\n"
    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
    "GNU Lesser General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU Lesser General Public License\n"
    "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
    program_name, program_name, program_name
#else
    "%s is free software; you can redistribute it and/or\n"
    "modify it under the terms of the GNU Lesser General Public\n"
    "License as published by the Free Software Foundation; either\n"
    "version 2.1 of the License, or (at your option) any later version.\n"
    "\n"
    "%s is distributed in the hope that it will be useful,\n"
    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
    "Lesser General Public License for more details.\n"
    "\n"
    "You should have received a copy of the GNU Lesser General Public\n"
    "License along with %s; if not, write to the Free Software\n"
    "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
    program_name, program_name, program_name
#endif
    );
}

void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts)
{
    int i;
    char fmt_str[128];
    for (i=-1; i < nb_fmts; i++) {
        get_fmt_string (fmt_str, sizeof(fmt_str), i);
        fprintf(stdout, "%s\n", fmt_str);
    }
}

void show_formats(void)
{
    AVInputFormat *ifmt=NULL;
    AVOutputFormat *ofmt=NULL;
    const char *last_name;

    printf(
        "File formats:\n"
        " D. = Demuxing supported\n"
        " .E = Muxing supported\n"
        " --\n");
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        const char *name=NULL;
        const char *long_name=NULL;

        while((ofmt= av_oformat_next(ofmt))) {
            if((name == NULL || strcmp(ofmt->name, name)<0) &&
                strcmp(ofmt->name, last_name)>0){
                name= ofmt->name;
                long_name= ofmt->long_name;
                encode=1;
            }
        }
        while((ifmt= av_iformat_next(ifmt))) {
            if((name == NULL || strcmp(ifmt->name, name)<0) &&
                strcmp(ifmt->name, last_name)>0){
                name= ifmt->name;
                long_name= ifmt->long_name;
                encode=0;
            }
            if(name && strcmp(ifmt->name, name)==0)
                decode=1;
        }
        if(name==NULL)
            break;
        last_name= name;

        printf(
            " %s%s %-15s %s\n",
            decode ? "D":" ",
            encode ? "E":" ",
            name,
            long_name ? long_name:" ");
    }
}

void show_codecs(void)
{
    AVCodec *p=NULL, *p2;
    const char *last_name;
    printf(
        "Codecs:\n"
        " D..... = Decoding supported\n"
        " .E.... = Encoding supported\n"
        " ..V... = Video codec\n"
        " ..A... = Audio codec\n"
        " ..S... = Subtitle codec\n"
        " ...S.. = Supports draw_horiz_band\n"
        " ....D. = Supports direct rendering method 1\n"
        " .....T = Supports weird frame truncation\n"
        " ------\n");
    last_name= "000";
    for(;;){
        int decode=0;
        int encode=0;
        int cap=0;
        const char *type_str;

        p2=NULL;
        while((p= av_codec_next(p))) {
            if((p2==NULL || strcmp(p->name, p2->name)<0) &&
                strcmp(p->name, last_name)>0){
                p2= p;
                decode= encode= cap=0;
            }
            if(p2 && strcmp(p->name, p2->name)==0){
                if(p->decode) decode=1;
                if(p->encode) encode=1;
                cap |= p->capabilities;
            }
        }
        if(p2==NULL)
            break;
        last_name= p2->name;

        switch(p2->type) {
        case AVMEDIA_TYPE_VIDEO:
            type_str = "V";
            break;
        case AVMEDIA_TYPE_AUDIO:
            type_str = "A";
            break;
        case AVMEDIA_TYPE_SUBTITLE:
            type_str = "S";
            break;
        default:
            type_str = "?";
            break;
        }
        printf(
            " %s%s%s%s%s%s %-15s %s",
            decode ? "D": (/*p2->decoder ? "d":*/" "),
            encode ? "E":" ",
            type_str,
            cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S":" ",
            cap & CODEC_CAP_DR1 ? "D":" ",
            cap & CODEC_CAP_TRUNCATED ? "T":" ",
            p2->name,
            p2->long_name ? p2->long_name : "");
       /* if(p2->decoder && decode==0)
            printf(" use %s for decoding", p2->decoder->name);*/
        printf("\n");
    }
    printf("\n");
    printf(
"Note, the names of encoders and decoders do not always match, so there are\n"
"several cases where the above table shows encoder only or decoder only entries\n"
"even though both encoding and decoding are supported. For example, the h263\n"
"decoder corresponds to the h263 and h263p encoders, for file formats it is even\n"
"worse.\n");
}

void show_bsfs(void)
{
    AVBitStreamFilter *bsf=NULL;

    printf("Bitstream filters:\n");
    while((bsf = av_bitstream_filter_next(bsf)))
        printf("%s\n", bsf->name);
    printf("\n");
}

void show_protocols(void)
{
    URLProtocol *up=NULL;

    printf("Supported file protocols:\n");
    while((up = av_protocol_next(up)))
        printf("%s\n", up->name);
}

void show_filters(void)
{
    AVFilter av_unused(**filter) = NULL;

    printf("Filters:\n");
#if CONFIG_AVFILTER
    while ((filter = av_filter_next(filter)) && *filter)
        printf("%-16s %s\n", (*filter)->name, (*filter)->description);
#endif
}

void show_pix_fmts(void)
{
    enum PixelFormat pix_fmt;

    printf(
        "Pixel formats:\n"
        "I.... = Supported Input  format for conversion\n"
        ".O... = Supported Output format for conversion\n"
        "..H.. = Hardware accelerated format\n"
        "...P. = Paletted format\n"
        "....B = Bitstream format\n"
        "FLAGS NAME            NB_COMPONENTS BITS_PER_PIXEL\n"
        "-----\n");

#if !CONFIG_SWSCALE
#   define sws_isSupportedInput(x)  0
#   define sws_isSupportedOutput(x) 0
#endif

    for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++) {
        const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
        printf("%c%c%c%c%c %-16s       %d            %2d\n",
               sws_isSupportedInput (pix_fmt)      ? 'I' : '.',
               sws_isSupportedOutput(pix_fmt)      ? 'O' : '.',
               pix_desc->flags & PIX_FMT_HWACCEL   ? 'H' : '.',
               pix_desc->flags & PIX_FMT_PAL       ? 'P' : '.',
               pix_desc->flags & PIX_FMT_BITSTREAM ? 'B' : '.',
               pix_desc->name,
               pix_desc->nb_components,
               av_get_bits_per_pixel(pix_desc));
    }
}

int read_yesno(void)
{
    int c = getchar();
    int yesno = (toupper(c) == 'Y');

    while (c != '\n' && c != EOF)
        c = getchar();

    return yesno;
}

int read_file(const char *filename, char **bufptr, size_t *size)
{
    FILE *f = fopen(filename, "rb");

    if (!f) {
        fprintf(stderr, "Cannot read file '%s': %s\n", filename, strerror(errno));
        return AVERROR(errno);
    }
    fseek(f, 0, SEEK_END);
    *size = ftell(f);
    fseek(f, 0, SEEK_SET);
    *bufptr = av_malloc(*size + 1);
    if (!*bufptr) {
        fprintf(stderr, "Could not allocate file buffer\n");
        fclose(f);
        return AVERROR(ENOMEM);
    }
    fread(*bufptr, 1, *size, f);
    (*bufptr)[*size++] = '\0';

    fclose(f);
    return 0;
}
OpenPOWER on IntegriCloud