avprobe.c

   1 /*
   2  * avprobe : Simple Media Prober based on the Libav libraries
   3  * Copyright (c) 2007-2010 Stefano Sabatini
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include "libavformat/avformat.h"
  25 #include "libavcodec/avcodec.h"
  26 #include "libavutil/opt.h"
  27 #include "libavutil/pixdesc.h"
  28 #include "libavutil/dict.h"
  29 #include "libavutil/libm.h"
  30 #include "libavdevice/avdevice.h"
  31 #include "cmdutils.h"
  32
  33 const char program_name[] = "avprobe";
  34 const int program_birth_year = 2007;
  35
  36 static int do_show_format  = 0;
  37 static AVDictionary *fmt_entries_to_show = NULL;
  38 static int nb_fmt_entries_to_show;
  39 static int do_show_packets = 0;
  40 static int do_show_streams = 0;
  41
  42 static int show_value_unit              = 0;
  43 static int use_value_prefix             = 0;
  44 static int use_byte_value_binary_prefix = 0;
  45 static int use_value_sexagesimal_format = 0;
  46
  47 /* globals */
  48 static const OptionDef *options;
  49
  50 /* AVprobe context */
  51 static const char *input_filename;
  52 static AVInputFormat *iformat = NULL;
  53
  54 static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
  55 static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P"  };
  56
  57 static const char unit_second_str[]         = "s"    ;
  58 static const char unit_hertz_str[]          = "Hz"   ;
  59 static const char unit_byte_str[]           = "byte" ;
  60 static const char unit_bit_per_second_str[] = "bit/s";
  61
  62 static void exit_program(void)
  63 {
  64     av_dict_free(&fmt_entries_to_show);
  65 }
  66
  67 /*
  68  * The output is structured in array and objects that might contain items
  69  * Array could require the objects within to not be named.
  70  * Object could require the items within to be named.
  71  *
  72  * For flat representation the name of each section is saved on prefix so it
  73  * can be rendered in order to represent nested structures (e.g. array of
  74  * objects for the packets list).
  75  *
  76  * Within an array each element can need an unique identifier or an index.
  77  *
  78  * Nesting level is accounted separately.
  79  */
  80
  81 typedef enum {
  82     ARRAY,
  83     OBJECT
  84 } ProbeElementType;
  85
  86 typedef struct {
  87     const char *name;
  88     ProbeElementType type;
  89     int64_t index;
  90     int64_t nb_elems;
  91 } ProbeElement;
  92
  93 typedef struct {
  94     ProbeElement *prefix;
  95     int level;
  96     void (*print_header)(void);
  97     void (*print_footer)(void);
  98
  99     void (*print_array_header) (const char *name);
 100     void (*print_array_footer) (const char *name);
 101     void (*print_object_header)(const char *name);
 102     void (*print_object_footer)(const char *name);
 103
 104     void (*print_integer) (const char *key, int64_t value);
 105     void (*print_string)  (const char *key, const char *value);
 106 } OutputContext;
 107
 108 static AVIOContext *probe_out = NULL;
 109 static OutputContext octx;
 110 #define AVP_INDENT() avio_printf(probe_out, "%*c", octx.level * 2, ' ')
 111
 112 /*
 113  * Default format, INI
 114  *
 115  * - all key and values are utf8
 116  * - '.' is the subgroup separator
 117  * - newlines and the following characters are escaped
 118  * - '\' is the escape character
 119  * - '#' is the comment
 120  * - '=' is the key/value separators
 121  * - ':' is not used but usually parsed as key/value separator
 122  */
 123
 124 static void ini_print_header(void)
 125 {
 126     avio_printf(probe_out, "# avprobe output\n\n");
 127 }
 128 static void ini_print_footer(void)
 129 {
 130     avio_w8(probe_out, '\n');
 131 }
 132
 133 static void ini_escape_print(const char *s)
 134 {
 135     int i = 0;
 136     char c = 0;
 137
 138     while (c = s[i++]) {
 139         switch (c) {
 140         case '\r': avio_printf(probe_out, "%s", "\\r"); break;
 141         case '\n': avio_printf(probe_out, "%s", "\\n"); break;
 142         case '\f': avio_printf(probe_out, "%s", "\\f"); break;
 143         case '\b': avio_printf(probe_out, "%s", "\\b"); break;
 144         case '\t': avio_printf(probe_out, "%s", "\\t"); break;
 145         case '\\':
 146         case '#' :
 147         case '=' :
 148         case ':' : avio_w8(probe_out, '\\');
 149         default:
 150             if ((unsigned char)c < 32)
 151                 avio_printf(probe_out, "\\x00%02x", c & 0xff);
 152             else
 153                 avio_w8(probe_out, c);
 154         break;
 155         }
 156     }
 157 }
 158
 159 static void ini_print_array_header(const char *name)
 160 {
 161     if (octx.prefix[octx.level -1].nb_elems)
 162         avio_printf(probe_out, "\n");
 163 }
 164
 165 static void ini_print_object_header(const char *name)
 166 {
 167     int i;
 168     ProbeElement *el = octx.prefix + octx.level -1;
 169
 170     if (el->nb_elems)
 171         avio_printf(probe_out, "\n");
 172
 173     avio_printf(probe_out, "[");
 174
 175     for (i = 1; i < octx.level; i++) {
 176         el = octx.prefix + i;
 177         avio_printf(probe_out, "%s.", el->name);
 178         if (el->index >= 0)
 179             avio_printf(probe_out, "%"PRId64".", el->index);
 180     }
 181
 182     avio_printf(probe_out, "%s", name);
 183     if (el && el->type == ARRAY)
 184         avio_printf(probe_out, ".%"PRId64"", el->nb_elems);
 185     avio_printf(probe_out, "]\n");
 186 }
 187
 188 static void ini_print_integer(const char *key, int64_t value)
 189 {
 190     ini_escape_print(key);
 191     avio_printf(probe_out, "=%"PRId64"\n", value);
 192 }
 193
 194
 195 static void ini_print_string(const char *key, const char *value)
 196 {
 197     ini_escape_print(key);
 198     avio_printf(probe_out, "=");
 199     ini_escape_print(value);
 200     avio_w8(probe_out, '\n');
 201 }
 202
 203 /*
 204  * Alternate format, JSON
 205  */
 206
 207 static void json_print_header(void)
 208 {
 209     avio_printf(probe_out, "{");
 210 }
 211 static void json_print_footer(void)
 212 {
 213     avio_printf(probe_out, "}\n");
 214 }
 215
 216 static void json_print_array_header(const char *name)
 217 {
 218     if (octx.prefix[octx.level -1].nb_elems)
 219         avio_printf(probe_out, ",\n");
 220     AVP_INDENT();
 221     avio_printf(probe_out, "\"%s\" : ", name);
 222     avio_printf(probe_out, "[\n");
 223 }
 224
 225 static void json_print_array_footer(const char *name)
 226 {
 227     avio_printf(probe_out, "\n");
 228     AVP_INDENT();
 229     avio_printf(probe_out, "]");
 230 }
 231
 232 static void json_print_object_header(const char *name)
 233 {
 234     if (octx.prefix[octx.level -1].nb_elems)
 235         avio_printf(probe_out, ",\n");
 236     AVP_INDENT();
 237     if (octx.prefix[octx.level -1].type == OBJECT)
 238         avio_printf(probe_out, "\"%s\" : ", name);
 239     avio_printf(probe_out, "{\n");
 240 }
 241
 242 static void json_print_object_footer(const char *name)
 243 {
 244     avio_printf(probe_out, "\n");
 245     AVP_INDENT();
 246     avio_printf(probe_out, "}");
 247 }
 248
 249 static void json_print_integer(const char *key, int64_t value)
 250 {
 251     if (octx.prefix[octx.level -1].nb_elems)
 252         avio_printf(probe_out, ",\n");
 253     AVP_INDENT();
 254     avio_printf(probe_out, "\"%s\" : %"PRId64"", key, value);
 255 }
 256
 257 static void json_escape_print(const char *s)
 258 {
 259     int i = 0;
 260     char c = 0;
 261
 262     while (c = s[i++]) {
 263         switch (c) {
 264         case '\r': avio_printf(probe_out, "%s", "\\r"); break;
 265         case '\n': avio_printf(probe_out, "%s", "\\n"); break;
 266         case '\f': avio_printf(probe_out, "%s", "\\f"); break;
 267         case '\b': avio_printf(probe_out, "%s", "\\b"); break;
 268         case '\t': avio_printf(probe_out, "%s", "\\t"); break;
 269         case '\\':
 270         case '"' : avio_w8(probe_out, '\\');
 271         default:
 272             if ((unsigned char)c < 32)
 273                 avio_printf(probe_out, "\\u00%02x", c & 0xff);
 274             else
 275                 avio_w8(probe_out, c);
 276         break;
 277         }
 278     }
 279 }
 280
 281 static void json_print_string(const char *key, const char *value)
 282 {
 283     if (octx.prefix[octx.level -1].nb_elems)
 284         avio_printf(probe_out, ",\n");
 285     AVP_INDENT();
 286     avio_w8(probe_out, '\"');
 287     json_escape_print(key);
 288     avio_printf(probe_out, "\" : \"");
 289     json_escape_print(value);
 290     avio_w8(probe_out, '\"');
 291 }
 292
 293 /*
 294  * old-style pseudo-INI
 295  */
 296 static void old_print_object_header(const char *name)
 297 {
 298     char *str, *p;
 299
 300     if (!strcmp(name, "tags"))
 301         return;
 302
 303     str = p = av_strdup(name);
 304     while (*p) {
 305         *p = toupper(*p);
 306         p++;
 307     }
 308
 309     avio_printf(probe_out, "[%s]\n", str);
 310     av_freep(&str);
 311 }
 312
 313 static void old_print_object_footer(const char *name)
 314 {
 315     char *str, *p;
 316
 317     if (!strcmp(name, "tags"))
 318         return;
 319
 320     str = p = av_strdup(name);
 321     while (*p) {
 322         *p = toupper(*p);
 323         p++;
 324     }
 325
 326     avio_printf(probe_out, "[/%s]\n", str);
 327     av_freep(&str);
 328 }
 329
 330 static void old_print_string(const char *key, const char *value)
 331 {
 332     if (!strcmp(octx.prefix[octx.level - 1].name, "tags"))
 333         avio_printf(probe_out, "TAG:");
 334     ini_print_string(key, value);
 335 }
 336
 337 /*
 338  * Simple Formatter for single entries.
 339  */
 340
 341 static void show_format_entry_integer(const char *key, int64_t value)
 342 {
 343     if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
 344         if (nb_fmt_entries_to_show > 1)
 345             avio_printf(probe_out, "%s=", key);
 346         avio_printf(probe_out, "%"PRId64"\n", value);
 347     }
 348 }
 349
 350 static void show_format_entry_string(const char *key, const char *value)
 351 {
 352     if (key && av_dict_get(fmt_entries_to_show, key, NULL, 0)) {
 353         if (nb_fmt_entries_to_show > 1)
 354             avio_printf(probe_out, "%s=", key);
 355         avio_printf(probe_out, "%s\n", value);
 356     }
 357 }
 358
 359 static void probe_group_enter(const char *name, int type)
 360 {
 361     int64_t count = -1;
 362
 363     octx.prefix =
 364         av_realloc(octx.prefix, sizeof(ProbeElement) * (octx.level + 1));
 365
 366     if (!octx.prefix || !name) {
 367         fprintf(stderr, "Out of memory\n");
 368         exit(1);
 369     }
 370
 371     if (octx.level) {
 372         ProbeElement *parent = octx.prefix + octx.level -1;
 373         if (parent->type == ARRAY)
 374             count = parent->nb_elems;
 375         parent->nb_elems++;
 376     }
 377
 378     octx.prefix[octx.level++] = (ProbeElement){name, type, count, 0};
 379 }
 380
 381 static void probe_group_leave(void)
 382 {
 383     --octx.level;
 384 }
 385
 386 static void probe_header(void)
 387 {
 388     if (octx.print_header)
 389         octx.print_header();
 390     probe_group_enter("root", OBJECT);
 391 }
 392
 393 static void probe_footer(void)
 394 {
 395     if (octx.print_footer)
 396         octx.print_footer();
 397     probe_group_leave();
 398 }
 399
 400
 401 static void probe_array_header(const char *name)
 402 {
 403     if (octx.print_array_header)
 404         octx.print_array_header(name);
 405
 406     probe_group_enter(name, ARRAY);
 407 }
 408
 409 static void probe_array_footer(const char *name)
 410 {
 411     probe_group_leave();
 412     if (octx.print_array_footer)
 413         octx.print_array_footer(name);
 414 }
 415
 416 static void probe_object_header(const char *name)
 417 {
 418     if (octx.print_object_header)
 419         octx.print_object_header(name);
 420
 421     probe_group_enter(name, OBJECT);
 422 }
 423
 424 static void probe_object_footer(const char *name)
 425 {
 426     probe_group_leave();
 427     if (octx.print_object_footer)
 428         octx.print_object_footer(name);
 429 }
 430
 431 static void probe_int(const char *key, int64_t value)
 432 {
 433     octx.print_integer(key, value);
 434     octx.prefix[octx.level -1].nb_elems++;
 435 }
 436
 437 static void probe_str(const char *key, const char *value)
 438 {
 439     octx.print_string(key, value);
 440     octx.prefix[octx.level -1].nb_elems++;
 441 }
 442
 443 static void probe_dict(AVDictionary *dict, const char *name)
 444 {
 445     AVDictionaryEntry *entry = NULL;
 446     if (!dict)
 447         return;
 448     probe_object_header(name);
 449     while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
 450         probe_str(entry->key, entry->value);
 451     }
 452     probe_object_footer(name);
 453 }
 454
 455 static char *value_string(char *buf, int buf_size, double val, const char *unit)
 456 {
 457     if (unit == unit_second_str && use_value_sexagesimal_format) {
 458         double secs;
 459         int hours, mins;
 460         secs  = val;
 461         mins  = (int)secs / 60;
 462         secs  = secs - mins * 60;
 463         hours = mins / 60;
 464         mins %= 60;
 465         snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
 466     } else if (use_value_prefix) {
 467         const char *prefix_string;
 468         int index;
 469
 470         if (unit == unit_byte_str && use_byte_value_binary_prefix) {
 471             index = (int) log2(val) / 10;
 472             index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) - 1);
 473             val  /= pow(2, index * 10);
 474             prefix_string = binary_unit_prefixes[index];
 475         } else {
 476             index = (int) (log10(val)) / 3;
 477             index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) - 1);
 478             val  /= pow(10, index * 3);
 479             prefix_string = decimal_unit_prefixes[index];
 480         }
 481         snprintf(buf, buf_size, "%.*f%s%s",
 482                  index ? 3 : 0, val,
 483                  prefix_string,
 484                  show_value_unit ? unit : "");
 485     } else {
 486         snprintf(buf, buf_size, "%f%s", val, show_value_unit ? unit : "");
 487     }
 488
 489     return buf;
 490 }
 491
 492 static char *time_value_string(char *buf, int buf_size, int64_t val,
 493                                const AVRational *time_base)
 494 {
 495     if (val == AV_NOPTS_VALUE) {
 496         snprintf(buf, buf_size, "N/A");
 497     } else {
 498         value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
 499     }
 500
 501     return buf;
 502 }
 503
 504 static char *ts_value_string(char *buf, int buf_size, int64_t ts)
 505 {
 506     if (ts == AV_NOPTS_VALUE) {
 507         snprintf(buf, buf_size, "N/A");
 508     } else {
 509         snprintf(buf, buf_size, "%"PRId64, ts);
 510     }
 511
 512     return buf;
 513 }
 514
 515 static char *rational_string(char *buf, int buf_size, const char *sep,
 516                              const AVRational *rat)
 517 {
 518     snprintf(buf, buf_size, "%d%s%d", rat->num, sep, rat->den);
 519     return buf;
 520 }
 521
 522 static char *tag_string(char *buf, int buf_size, int tag)
 523 {
 524     snprintf(buf, buf_size, "0x%04x", tag);
 525     return buf;
 526 }
 527
 528
 529
 530 static const char *media_type_string(enum AVMediaType media_type)
 531 {
 532     switch (media_type) {
 533     case AVMEDIA_TYPE_VIDEO:      return "video";
 534     case AVMEDIA_TYPE_AUDIO:      return "audio";
 535     case AVMEDIA_TYPE_DATA:       return "data";
 536     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
 537     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
 538     default:                      return "unknown";
 539     }
 540 }
 541
 542 static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt)
 543 {
 544     char val_str[128];
 545     AVStream *st = fmt_ctx->streams[pkt->stream_index];
 546
 547     probe_object_header("packet");
 548     probe_str("codec_type", media_type_string(st->codec->codec_type));
 549     probe_int("stream_index", pkt->stream_index);
 550     probe_str("pts", ts_value_string(val_str, sizeof(val_str), pkt->pts));
 551     probe_str("pts_time", time_value_string(val_str, sizeof(val_str),
 552                                                pkt->pts, &st->time_base));
 553     probe_str("dts", ts_value_string(val_str, sizeof(val_str), pkt->dts));
 554     probe_str("dts_time", time_value_string(val_str, sizeof(val_str),
 555                                                pkt->dts, &st->time_base));
 556     probe_str("duration", ts_value_string(val_str, sizeof(val_str),
 557                                              pkt->duration));
 558     probe_str("duration_time", time_value_string(val_str, sizeof(val_str),
 559                                                     pkt->duration,
 560                                                     &st->time_base));
 561     probe_str("size", value_string(val_str, sizeof(val_str),
 562                                       pkt->size, unit_byte_str));
 563     probe_int("pos", pkt->pos);
 564     probe_str("flags", pkt->flags & AV_PKT_FLAG_KEY ? "K" : "_");
 565     probe_object_footer("packet");
 566 }
 567
 568 static void show_packets(AVFormatContext *fmt_ctx)
 569 {
 570     AVPacket pkt;
 571
 572     av_init_packet(&pkt);
 573     probe_array_header("packets");
 574     while (!av_read_frame(fmt_ctx, &pkt))
 575         show_packet(fmt_ctx, &pkt);
 576     probe_array_footer("packets");
 577 }
 578
 579 static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
 580 {
 581     AVStream *stream = fmt_ctx->streams[stream_idx];
 582     AVCodecContext *dec_ctx;
 583     const AVCodec *dec;
 584     const char *profile;
 585     char val_str[128];
 586     AVRational display_aspect_ratio, *sar = NULL;
 587     const AVPixFmtDescriptor *desc;
 588
 589     probe_object_header("stream");
 590
 591     probe_int("index", stream->index);
 592
 593     if ((dec_ctx = stream->codec)) {
 594         if ((dec = dec_ctx->codec)) {
 595             probe_str("codec_name", dec->name);
 596             probe_str("codec_long_name", dec->long_name);
 597         } else {
 598             probe_str("codec_name", "unknown");
 599         }
 600
 601         probe_str("codec_type", media_type_string(dec_ctx->codec_type));
 602         probe_str("codec_time_base",
 603                   rational_string(val_str, sizeof(val_str),
 604                                   "/", &dec_ctx->time_base));
 605
 606         /* print AVI/FourCC tag */
 607         av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
 608         probe_str("codec_tag_string", val_str);
 609         probe_str("codec_tag", tag_string(val_str, sizeof(val_str),
 610                                           dec_ctx->codec_tag));
 611
 612         /* print profile, if there is one */
 613         if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile)))
 614             probe_str("profile", profile);
 615
 616         switch (dec_ctx->codec_type) {
 617         case AVMEDIA_TYPE_VIDEO:
 618             probe_int("width", dec_ctx->width);
 619             probe_int("height", dec_ctx->height);
 620             probe_int("has_b_frames", dec_ctx->has_b_frames);
 621             if (dec_ctx->sample_aspect_ratio.num)
 622                 sar = &dec_ctx->sample_aspect_ratio;
 623             else if (stream->sample_aspect_ratio.num)
 624                 sar = &stream->sample_aspect_ratio;
 625
 626             if (sar) {
 627                 probe_str("sample_aspect_ratio",
 628                           rational_string(val_str, sizeof(val_str), ":", sar));
 629                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
 630                           dec_ctx->width  * sar->num, dec_ctx->height * sar->den,
 631                           1024*1024);
 632                 probe_str("display_aspect_ratio",
 633                           rational_string(val_str, sizeof(val_str), ":",
 634                           &display_aspect_ratio));
 635             }
 636             desc = av_pix_fmt_desc_get(dec_ctx->pix_fmt);
 637             probe_str("pix_fmt", desc ? desc->name : "unknown");
 638             probe_int("level", dec_ctx->level);
 639             break;
 640
 641         case AVMEDIA_TYPE_AUDIO:
 642             probe_str("sample_rate",
 643                       value_string(val_str, sizeof(val_str),
 644                                    dec_ctx->sample_rate,
 645                                    unit_hertz_str));
 646             probe_int("channels", dec_ctx->channels);
 647             probe_int("bits_per_sample",
 648                       av_get_bits_per_sample(dec_ctx->codec_id));
 649             break;
 650         }
 651     } else {
 652         probe_str("codec_type", "unknown");
 653     }
 654
 655     if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
 656         probe_int("id", stream->id);
 657     probe_str("avg_frame_rate",
 658               rational_string(val_str, sizeof(val_str), "/",
 659               &stream->avg_frame_rate));
 660     if (dec_ctx->bit_rate)
 661         probe_str("bit_rate",
 662                   value_string(val_str, sizeof(val_str),
 663                                dec_ctx->bit_rate, unit_bit_per_second_str));
 664     probe_str("time_base",
 665               rational_string(val_str, sizeof(val_str), "/",
 666               &stream->time_base));
 667     probe_str("start_time",
 668               time_value_string(val_str, sizeof(val_str),
 669                                 stream->start_time, &stream->time_base));
 670     probe_str("duration",
 671               time_value_string(val_str, sizeof(val_str),
 672                                 stream->duration, &stream->time_base));
 673     if (stream->nb_frames)
 674         probe_int("nb_frames", stream->nb_frames);
 675
 676     probe_dict(stream->metadata, "tags");
 677
 678     probe_object_footer("stream");
 679 }
 680
 681 static void show_format(AVFormatContext *fmt_ctx)
 682 {
 683     char val_str[128];
 684     int64_t size = fmt_ctx->pb ? avio_size(fmt_ctx->pb) : -1;
 685
 686     probe_object_header("format");
 687     probe_str("filename",         fmt_ctx->filename);
 688     probe_int("nb_streams",       fmt_ctx->nb_streams);
 689     probe_str("format_name",      fmt_ctx->iformat->name);
 690     probe_str("format_long_name", fmt_ctx->iformat->long_name);
 691     probe_str("start_time",
 692                        time_value_string(val_str, sizeof(val_str),
 693                                          fmt_ctx->start_time, &AV_TIME_BASE_Q));
 694     probe_str("duration",
 695                        time_value_string(val_str, sizeof(val_str),
 696                                          fmt_ctx->duration, &AV_TIME_BASE_Q));
 697     probe_str("size",
 698                        size >= 0 ? value_string(val_str, sizeof(val_str),
 699                                                 size, unit_byte_str)
 700                                   : "unknown");
 701     probe_str("bit_rate",
 702                        value_string(val_str, sizeof(val_str),
 703                                     fmt_ctx->bit_rate, unit_bit_per_second_str));
 704
 705     probe_dict(fmt_ctx->metadata, "tags");
 706
 707     probe_object_footer("format");
 708 }
 709
 710 static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
 711 {
 712     int err, i;
 713     AVFormatContext *fmt_ctx = NULL;
 714     AVDictionaryEntry *t;
 715
 716     if ((err = avformat_open_input(&fmt_ctx, filename,
 717                                    iformat, &format_opts)) < 0) {
 718         print_error(filename, err);
 719         return err;
 720     }
 721     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
 722         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
 723         return AVERROR_OPTION_NOT_FOUND;
 724     }
 725
 726
 727     /* fill the streams in the format context */
 728     if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
 729         print_error(filename, err);
 730         return err;
 731     }
 732
 733     av_dump_format(fmt_ctx, 0, filename, 0);
 734
 735     /* bind a decoder to each input stream */
 736     for (i = 0; i < fmt_ctx->nb_streams; i++) {
 737         AVStream *stream = fmt_ctx->streams[i];
 738         AVCodec *codec;
 739
 740         if (stream->codec->codec_id == AV_CODEC_ID_PROBE) {
 741             fprintf(stderr, "Failed to probe codec for input stream %d\n",
 742                     stream->index);
 743         } else if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
 744             fprintf(stderr,
 745                     "Unsupported codec with id %d for input stream %d\n",
 746                     stream->codec->codec_id, stream->index);
 747         } else if (avcodec_open2(stream->codec, codec, NULL) < 0) {
 748             fprintf(stderr, "Error while opening codec for input stream %d\n",
 749                     stream->index);
 750         }
 751     }
 752
 753     *fmt_ctx_ptr = fmt_ctx;
 754     return 0;
 755 }
 756
 757 static void close_input_file(AVFormatContext **ctx_ptr)
 758 {
 759     int i;
 760     AVFormatContext *fmt_ctx = *ctx_ptr;
 761
 762     /* close decoder for each stream */
 763     for (i = 0; i < fmt_ctx->nb_streams; i++) {
 764         AVStream *stream = fmt_ctx->streams[i];
 765
 766         avcodec_close(stream->codec);
 767     }
 768     avformat_close_input(ctx_ptr);
 769 }
 770
 771 static int probe_file(const char *filename)
 772 {
 773     AVFormatContext *fmt_ctx;
 774     int ret, i;
 775
 776     if ((ret = open_input_file(&fmt_ctx, filename)))
 777         return ret;
 778
 779     if (do_show_format)
 780         show_format(fmt_ctx);
 781
 782     if (do_show_streams) {
 783         probe_array_header("streams");
 784         for (i = 0; i < fmt_ctx->nb_streams; i++)
 785             show_stream(fmt_ctx, i);
 786         probe_array_footer("streams");
 787     }
 788
 789     if (do_show_packets)
 790         show_packets(fmt_ctx);
 791
 792     close_input_file(&fmt_ctx);
 793     return 0;
 794 }
 795
 796 static void show_usage(void)
 797 {
 798     printf("Simple multimedia streams analyzer\n");
 799     printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
 800     printf("\n");
 801 }
 802
 803 static int opt_format(void *optctx, const char *opt, const char *arg)
 804 {
 805     iformat = av_find_input_format(arg);
 806     if (!iformat) {
 807         fprintf(stderr, "Unknown input format: %s\n", arg);
 808         return AVERROR(EINVAL);
 809     }
 810     return 0;
 811 }
 812
 813 static int opt_output_format(void *optctx, const char *opt, const char *arg)
 814 {
 815
 816     if (!strcmp(arg, "json")) {
 817         octx.print_header        = json_print_header;
 818         octx.print_footer        = json_print_footer;
 819         octx.print_array_header  = json_print_array_header;
 820         octx.print_array_footer  = json_print_array_footer;
 821         octx.print_object_header = json_print_object_header;
 822         octx.print_object_footer = json_print_object_footer;
 823
 824         octx.print_integer = json_print_integer;
 825         octx.print_string  = json_print_string;
 826     } else if (!strcmp(arg, "ini")) {
 827         octx.print_header        = ini_print_header;
 828         octx.print_footer        = ini_print_footer;
 829         octx.print_array_header  = ini_print_array_header;
 830         octx.print_object_header = ini_print_object_header;
 831
 832         octx.print_integer = ini_print_integer;
 833         octx.print_string  = ini_print_string;
 834     } else if (!strcmp(arg, "old")) {
 835         octx.print_header        = NULL;
 836         octx.print_object_header = old_print_object_header;
 837         octx.print_object_footer = old_print_object_footer;
 838
 839         octx.print_string        = old_print_string;
 840     } else {
 841         av_log(NULL, AV_LOG_ERROR, "Unsupported formatter %s\n", arg);
 842         return AVERROR(EINVAL);
 843     }
 844     return 0;
 845 }
 846
 847 static int opt_show_format_entry(void *optctx, const char *opt, const char *arg)
 848 {
 849     do_show_format = 1;
 850     nb_fmt_entries_to_show++;
 851     octx.print_header        = NULL;
 852     octx.print_footer        = NULL;
 853     octx.print_array_header  = NULL;
 854     octx.print_array_footer  = NULL;
 855     octx.print_object_header = NULL;
 856     octx.print_object_footer = NULL;
 857
 858     octx.print_integer = show_format_entry_integer;
 859     octx.print_string  = show_format_entry_string;
 860     av_dict_set(&fmt_entries_to_show, arg, "", 0);
 861     return 0;
 862 }
 863
 864 static void opt_input_file(void *optctx, const char *arg)
 865 {
 866     if (input_filename) {
 867         fprintf(stderr,
 868                 "Argument '%s' provided as input filename, but '%s' was already specified.\n",
 869                 arg, input_filename);
 870         exit(1);
 871     }
 872     if (!strcmp(arg, "-"))
 873         arg = "pipe:";
 874     input_filename = arg;
 875 }
 876
 877 void show_help_default(const char *opt, const char *arg)
 878 {
 879     av_log_set_callback(log_callback_help);
 880     show_usage();
 881     show_help_options(options, "Main options:", 0, 0, 0);
 882     printf("\n");
 883     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
 884 }
 885
 886 static int opt_pretty(void *optctx, const char *opt, const char *arg)
 887 {
 888     show_value_unit              = 1;
 889     use_value_prefix             = 1;
 890     use_byte_value_binary_prefix = 1;
 891     use_value_sexagesimal_format = 1;
 892     return 0;
 893 }
 894
 895 static const OptionDef real_options[] = {
 896 #include "cmdutils_common_opts.h"
 897     { "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" },
 898     { "of", HAS_ARG, {.func_arg = opt_output_format}, "output the document either as ini or json", "output_format" },
 899     { "unit", OPT_BOOL, {&show_value_unit},
 900       "show unit of the displayed values" },
 901     { "prefix", OPT_BOOL, {&use_value_prefix},
 902       "use SI prefixes for the displayed values" },
 903     { "byte_binary_prefix", OPT_BOOL, {&use_byte_value_binary_prefix},
 904       "use binary prefixes for byte units" },
 905     { "sexagesimal", OPT_BOOL,  {&use_value_sexagesimal_format},
 906       "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
 907     { "pretty", 0, {.func_arg = opt_pretty},
 908       "prettify the format of displayed values, make it more human readable" },
 909     { "show_format",  OPT_BOOL, {&do_show_format} , "show format/container info" },
 910     { "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
 911       "show a particular entry from the format/container info", "entry" },
 912     { "show_packets", OPT_BOOL, {&do_show_packets}, "show packets info" },
 913     { "show_streams", OPT_BOOL, {&do_show_streams}, "show streams info" },
 914     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default},
 915       "generic catch all option", "" },
 916     { NULL, },
 917 };
 918
 919 static int probe_buf_write(void *opaque, uint8_t *buf, int buf_size)
 920 {
 921     printf("%.*s", buf_size, buf);
 922     return 0;
 923 }
 924
 925 #define AVP_BUFFSIZE 4096
 926
 927 int main(int argc, char **argv)
 928 {
 929     int ret;
 930     uint8_t *buffer = av_malloc(AVP_BUFFSIZE);
 931
 932     if (!buffer)
 933         exit(1);
 934
 935     atexit(exit_program);
 936
 937     options = real_options;
 938     parse_loglevel(argc, argv, options);
 939     av_register_all();
 940     avformat_network_init();
 941     init_opts();
 942 #if CONFIG_AVDEVICE
 943     avdevice_register_all();
 944 #endif
 945
 946     show_banner();
 947
 948     octx.print_header = ini_print_header;
 949     octx.print_footer = ini_print_footer;
 950
 951     octx.print_array_header = ini_print_array_header;
 952     octx.print_object_header = ini_print_object_header;
 953
 954     octx.print_integer = ini_print_integer;
 955     octx.print_string = ini_print_string;
 956
 957     parse_options(NULL, argc, argv, options, opt_input_file);
 958
 959     if (!input_filename) {
 960         show_usage();
 961         fprintf(stderr, "You have to specify one input file.\n");
 962         fprintf(stderr,
 963                 "Use -h to get full help or, even better, run 'man %s'.\n",
 964                 program_name);
 965         exit(1);
 966     }
 967
 968     probe_out = avio_alloc_context(buffer, AVP_BUFFSIZE, 1, NULL, NULL,
 969                                  probe_buf_write, NULL);
 970     if (!probe_out)
 971         exit(1);
 972
 973     probe_header();
 974     ret = probe_file(input_filename);
 975     probe_footer();
 976     avio_flush(probe_out);
 977     avio_close(probe_out);
 978
 979     avformat_network_deinit();
 980
 981     return ret;
 982 }