codec-cfg.c

   1 /*
   2  * codecs.conf parser
   3  *
   4  * Copyright (C) 2001 Szabolcs Berecz <szabi@inf.elte.hu>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #include <errno.h>
  28 #include <ctype.h>
  29 #include <assert.h>
  30 #include <string.h>
  31 #include <stdint.h>
  32
  33 #include "config.h"
  34 #include "mp_msg.h"
  35 #include "libmpcodecs/img_format.h"
  36 #include "codec-cfg.h"
  37 #include "bstr.h"
  38 #include "stream/stream.h"
  39 #include "path.h"
  40
  41 static const char embedded_file[] =
  42 #include "codecs.conf.h"
  43     ;
  44 static const struct bstr builtin_codecs_conf = {
  45     .start = (char *)embedded_file, .len = sizeof(embedded_file) - 1
  46 };
  47
  48 #define mmioFOURCC( ch0, ch1, ch2, ch3 )                                \
  49                 ( (uint32_t)(uint8_t)(ch0) | ( (uint32_t)(uint8_t)(ch1) << 8 ) |        \
  50                 ( (uint32_t)(uint8_t)(ch2) << 16 ) | ( (uint32_t)(uint8_t)(ch3) << 24 ) )
  51
  52 #define PRINT_LINENUM mp_msg(MSGT_CODECCFG,MSGL_ERR," at line %d\n", line_num)
  53
  54 #define MAX_NR_TOKEN    16
  55
  56 #define RET_EOF         -1
  57 #define RET_EOL         -2
  58
  59 #define TYPE_VIDEO      0
  60 #define TYPE_AUDIO      1
  61
  62 static int codecs_conf_release;
  63 char * codecs_file = NULL;
  64
  65 static int add_to_fourcc(char *s, char *alias, unsigned int *fourcc,
  66                          unsigned int *map)
  67 {
  68     int i, j, freeslots;
  69     unsigned int tmp;
  70
  71     /* find first unused slot */
  72     for (i = 0; i < CODECS_MAX_FOURCC && fourcc[i] != 0xffffffff; i++)
  73         /* NOTHING */;
  74     freeslots = CODECS_MAX_FOURCC - i;
  75     if (!freeslots)
  76         goto err_out_too_many;
  77
  78     do {
  79         if (strlen(s) < 4)
  80             goto err_out_parse_error;
  81         tmp = mmioFOURCC(s[0], s[1], s[2], s[3]);
  82         for (j = 0; j < i; j++)
  83             if (tmp == fourcc[j])
  84                 goto err_out_duplicated;
  85         fourcc[i] = tmp;
  86         map[i] = alias ? mmioFOURCC(alias[0], alias[1], alias[2], alias[3]) : tmp;
  87         s += 4;
  88         i++;
  89     } while ((*(s++) == ',') && --freeslots);
  90
  91     if (!freeslots)
  92         goto err_out_too_many;
  93     if (*(--s) != '\0')
  94         goto err_out_parse_error;
  95     return 1;
  96 err_out_duplicated:
  97     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"duplicated FourCC");
  98     return 0;
  99 err_out_too_many:
 100     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"too many FourCCs/formats...");
 101     return 0;
 102 err_out_parse_error:
 103     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"parse error");
 104     return 0;
 105 }
 106
 107 static int add_to_format(char *s, char *alias,unsigned int *fourcc, unsigned int *fourccmap)
 108 {
 109     int i, j;
 110     char *endptr;
 111
 112     /* find first unused slot */
 113     for (i = 0; i < CODECS_MAX_FOURCC && fourcc[i] != 0xffffffff; i++)
 114         /* NOTHING */;
 115     if (i == CODECS_MAX_FOURCC) {
 116         mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"too many FourCCs/formats...");
 117         return 0;
 118     }
 119
 120     fourcc[i]=strtoul(s,&endptr,0);
 121     if (*endptr != '\0') {
 122         mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"parse error (format ID not a number?)");
 123         return 0;
 124     }
 125
 126     if(alias){
 127         fourccmap[i]=strtoul(alias,&endptr,0);
 128         if (*endptr != '\0') {
 129             mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"parse error (format ID alias not a number?)");
 130             return 0;
 131         }
 132     } else
 133         fourccmap[i]=fourcc[i];
 134
 135     for (j = 0; j < i; j++)
 136         if (fourcc[j] == fourcc[i]) {
 137             mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"duplicated format ID");
 138             return 0;
 139         }
 140
 141     return 1;
 142 }
 143
 144 static int add_to_inout(char *sfmt, char *sflags, unsigned int *outfmt,
 145                         unsigned char *outflags)
 146 {
 147
 148     static char *flagstr[] = {
 149         "flip",
 150         "noflip",
 151         "yuvhack",
 152         "query",
 153         "static",
 154         NULL
 155     };
 156
 157     int i, j, freeslots;
 158     unsigned char flags;
 159
 160     for (i = 0; i < CODECS_MAX_OUTFMT && outfmt[i] != 0xffffffff; i++)
 161         /* NOTHING */;
 162     freeslots = CODECS_MAX_OUTFMT - i;
 163     if (!freeslots)
 164         goto err_out_too_many;
 165
 166     flags = 0;
 167     if(sflags) {
 168         do {
 169             for (j = 0; flagstr[j] != NULL; j++)
 170                 if (!strncmp(sflags, flagstr[j],
 171                              strlen(flagstr[j])))
 172                     break;
 173             if (flagstr[j] == NULL)
 174                 goto err_out_parse_error;
 175             flags|=(1<<j);
 176             sflags+=strlen(flagstr[j]);
 177         } while (*(sflags++) == ',');
 178
 179         if (*(--sflags) != '\0')
 180             goto err_out_parse_error;
 181     }
 182
 183     do {
 184         for (j = 0; isalnum(sfmt[j]) || sfmt[j] == '_'; j++);
 185         unsigned int fmt = imgfmt_parse((struct bstr){sfmt, j}, true);
 186         if (!fmt)
 187             goto err_out_parse_error;
 188         outfmt[i] = fmt;
 189         outflags[i] = flags;
 190         ++i;
 191         sfmt += j;
 192     } while ((*(sfmt++) == ',') && --freeslots);
 193
 194     if (!freeslots)
 195         goto err_out_too_many;
 196
 197     if (*(--sfmt) != '\0')
 198         goto err_out_parse_error;
 199
 200     return 1;
 201 err_out_too_many:
 202     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"too many out...");
 203     return 0;
 204 err_out_parse_error:
 205     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"parse error");
 206     return 0;
 207 }
 208
 209 static int validate_codec(codecs_t *c, int type)
 210 {
 211     unsigned int i;
 212     char *tmp_name = c->name;
 213
 214     for (i = 0; i < strlen(tmp_name) && isalnum(tmp_name[i]); i++)
 215         /* NOTHING */;
 216
 217     if (i < strlen(tmp_name)) {
 218         mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"\ncodec(%s) name is not valid!\n", c->name);
 219         return 0;
 220     }
 221
 222     if (!c->info)
 223         c->info = strdup(c->name);
 224
 225     if (!c->drv) {
 226         mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"\ncodec(%s) does not have a driver!\n", c->name);
 227         return 0;
 228     }
 229
 230     return 1;
 231 }
 232
 233 static int add_comment(char *s, char **d)
 234 {
 235     int pos;
 236
 237     if (!*d)
 238         pos = 0;
 239     else {
 240         pos = strlen(*d);
 241         (*d)[pos++] = '\n';
 242     }
 243     if (!(*d = realloc(*d, pos + strlen(s) + 1))) {
 244         mp_tmsg(MSGT_CODECCFG,MSGL_FATAL,"Can't allocate memory for comment. ");
 245         return 0;
 246     }
 247     strcpy(*d + pos, s);
 248     return 1;
 249 }
 250
 251 static struct bstr filetext;
 252 static int line_num = 0;
 253 static char *line;
 254 static char *token[MAX_NR_TOKEN];
 255 static int read_nextline = 1;
 256
 257 static int get_token(int min, int max)
 258 {
 259     static int line_pos;
 260     int i;
 261     char c;
 262
 263     if (max >= MAX_NR_TOKEN) {
 264         mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"get_token(): max >= MAX_MR_TOKEN!");
 265         goto out_eof;
 266     }
 267
 268     memset(token, 0x00, sizeof(*token) * max);
 269
 270     if (read_nextline) {
 271         if (!filetext.len)
 272             goto out_eof;
 273         struct bstr nextline = bstr_getline(filetext, &filetext);
 274         line = nextline.start;
 275         line[nextline.len - 1] = 0;
 276         line_pos = 0;
 277         ++line_num;
 278         read_nextline = 0;
 279     }
 280     for (i = 0; i < max; i++) {
 281         while (isspace(line[line_pos]))
 282             ++line_pos;
 283         if (line[line_pos] == '\0' || line[line_pos] == '#' ||
 284             line[line_pos] == ';') {
 285             read_nextline = 1;
 286             if (i >= min)
 287                 goto out_ok;
 288             goto out_eol;
 289         }
 290         token[i] = line + line_pos;
 291         c = line[line_pos];
 292         if (c == '"' || c == '\'') {
 293             token[i]++;
 294             while (line[++line_pos] != c && line[line_pos])
 295                 /* NOTHING */;
 296         } else {
 297             for (/* NOTHING */; !isspace(line[line_pos]) &&
 298                                   line[line_pos]; line_pos++)
 299                 /* NOTHING */;
 300         }
 301         if (!line[line_pos]) {
 302             read_nextline = 1;
 303             if (i >= min - 1)
 304                 goto out_ok;
 305             goto out_eol;
 306         }
 307         line[line_pos] = '\0';
 308         line_pos++;
 309     }
 310 out_ok:
 311     return i;
 312 out_eof:
 313     read_nextline = 1;
 314     return RET_EOF;
 315 out_eol:
 316     return RET_EOL;
 317 }
 318
 319 static codecs_t *video_codecs=NULL;
 320 static codecs_t *audio_codecs=NULL;
 321 static int nr_vcodecs = 0;
 322 static int nr_acodecs = 0;
 323
 324 int parse_codec_cfg(const char *cfgfile)
 325 {
 326     codecs_t *codec = NULL; // current codec
 327     codecs_t **codecsp = NULL;// points to audio_codecs or to video_codecs
 328     char *endptr;   // strtoul()...
 329     int *nr_codecsp;
 330     int codec_type;     /* TYPE_VIDEO/TYPE_AUDIO */
 331     int tmp, i;
 332     int codec_cfg_min;
 333
 334     for (struct bstr s = builtin_codecs_conf; ; bstr_getline(s, &s)) {
 335         if (!s.len)
 336             abort();
 337         if (bstr_eatstart0(&s, "release ")) {
 338             codec_cfg_min = atoi(s.start);
 339             break;
 340         }
 341     }
 342
 343     // in case we call it a second time
 344     codecs_uninit_free();
 345
 346     nr_vcodecs = 0;
 347     nr_acodecs = 0;
 348
 349     if (cfgfile) {
 350         // Avoid printing errors from open_stream when trying optional files
 351         if (!mp_path_exists(cfgfile)) {
 352             mp_tmsg(MSGT_CODECCFG, MSGL_V,
 353                     "No optional codecs config file: %s\n", cfgfile);
 354             return 0;
 355         }
 356         mp_msg(MSGT_CODECCFG, MSGL_V, "Reading codec config file: %s\n",
 357                 cfgfile);
 358         struct stream *s = open_stream(cfgfile, NULL, NULL);
 359         if (!s)
 360             return 0;
 361         filetext = stream_read_complete(s, NULL, 10000000, 1);
 362         free_stream(s);
 363         if (!filetext.start)
 364             return 0;
 365     } else
 366         // Parsing modifies the data
 367         filetext = bstrdup(NULL, builtin_codecs_conf);
 368     void *tmpmem = filetext.start;
 369
 370     read_nextline = 1;
 371
 372     /*
 373      * this only catches release lines at the start of
 374      * codecs.conf, before audiocodecs and videocodecs.
 375      */
 376     while ((tmp = get_token(1, 1)) == RET_EOL)
 377         /* NOTHING */;
 378     if (tmp == RET_EOF)
 379         goto out;
 380     if (!strcmp(token[0], "release")) {
 381         if (get_token(1, 2) < 0)
 382             goto err_out_parse_error;
 383         tmp = atoi(token[0]);
 384         if (tmp < codec_cfg_min)
 385             goto err_out_release_num;
 386         codecs_conf_release = tmp;
 387         while ((tmp = get_token(1, 1)) == RET_EOL)
 388             /* NOTHING */;
 389         if (tmp == RET_EOF)
 390             goto out;
 391     } else
 392         goto err_out_release_num;
 393
 394     /*
 395      * check if the next block starts with 'audiocodec' or
 396      * with 'videocodec'
 397      */
 398     if (!strcmp(token[0], "audiocodec") || !strcmp(token[0], "videocodec"))
 399         goto loop_enter;
 400     goto err_out_parse_error;
 401
 402     while ((tmp = get_token(1, 1)) != RET_EOF) {
 403         if (tmp == RET_EOL)
 404             continue;
 405         if (!strcmp(token[0], "audiocodec") ||
 406             !strcmp(token[0], "videocodec")) {
 407             if (!validate_codec(codec, codec_type))
 408                 goto err_out_not_valid;
 409         loop_enter:
 410             if (*token[0] == 'v') {
 411                 codec_type = TYPE_VIDEO;
 412                 nr_codecsp = &nr_vcodecs;
 413                 codecsp = &video_codecs;
 414             } else {
 415                 assert(*token[0] == 'a');
 416                 codec_type = TYPE_AUDIO;
 417                 nr_codecsp = &nr_acodecs;
 418                 codecsp = &audio_codecs;
 419             }
 420             if (!(*codecsp = realloc(*codecsp,
 421                                      sizeof(codecs_t) * (*nr_codecsp + 2)))) {
 422                 mp_tmsg(MSGT_CODECCFG,MSGL_FATAL,"Can't realloc '*codecsp': %s\n", strerror(errno));
 423                 goto err_out;
 424             }
 425             codec=*codecsp + *nr_codecsp;
 426             ++*nr_codecsp;
 427             memset(codec,0,sizeof(codecs_t));
 428             memset(codec->fourcc, 0xff, sizeof(codec->fourcc));
 429             memset(codec->outfmt, 0xff, sizeof(codec->outfmt));
 430             memset(codec->infmt, 0xff, sizeof(codec->infmt));
 431
 432             if (get_token(1, 1) < 0)
 433                 goto err_out_parse_error;
 434             for (i = 0; i < *nr_codecsp - 1; i++) {
 435                 if(( (*codecsp)[i].name!=NULL) &&
 436                    (!strcmp(token[0], (*codecsp)[i].name)) ) {
 437                     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Codec name '%s' isn't unique.", token[0]);
 438                     goto err_out_print_linenum;
 439                 }
 440             }
 441             if (!(codec->name = strdup(token[0]))) {
 442                 mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Can't strdup -> 'name': %s\n", strerror(errno));
 443                 goto err_out;
 444             }
 445         } else if (!strcmp(token[0], "info")) {
 446             if (codec->info || get_token(1, 1) < 0)
 447                 goto err_out_parse_error;
 448             if (!(codec->info = strdup(token[0]))) {
 449                 mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Can't strdup -> 'info': %s\n", strerror(errno));
 450                 goto err_out;
 451             }
 452         } else if (!strcmp(token[0], "comment")) {
 453             if (get_token(1, 1) < 0)
 454                 goto err_out_parse_error;
 455             add_comment(token[0], &codec->comment);
 456         } else if (!strcmp(token[0], "fourcc")) {
 457             if (get_token(1, 2) < 0)
 458                 goto err_out_parse_error;
 459             if (!add_to_fourcc(token[0], token[1],
 460                                codec->fourcc,
 461                                codec->fourccmap))
 462                 goto err_out_print_linenum;
 463         } else if (!strcmp(token[0], "format")) {
 464             if (get_token(1, 2) < 0)
 465                 goto err_out_parse_error;
 466             if (!add_to_format(token[0], token[1],
 467                                codec->fourcc,codec->fourccmap))
 468                 goto err_out_print_linenum;
 469         } else if (!strcmp(token[0], "driver")) {
 470             if (get_token(1, 1) < 0)
 471                 goto err_out_parse_error;
 472             if (!(codec->drv = strdup(token[0]))) {
 473                 mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Can't strdup -> 'driver': %s\n", strerror(errno));
 474                 goto err_out;
 475             }
 476         } else if (!strcmp(token[0], "dll")) {
 477             if (get_token(1, 1) < 0)
 478                 goto err_out_parse_error;
 479             if (!(codec->dll = strdup(token[0]))) {
 480                 mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Can't strdup -> 'dll': %s", strerror(errno));
 481                 goto err_out;
 482             }
 483         } else if (!strcmp(token[0], "guid")) {
 484             if (get_token(11, 11) < 0)
 485                 goto err_out_parse_error;
 486             codec->guid.f1=strtoul(token[0],&endptr,0);
 487             if ((*endptr != ',' || *(endptr + 1) != '\0') &&
 488                 *endptr != '\0')
 489                 goto err_out_parse_error;
 490             codec->guid.f2=strtoul(token[1],&endptr,0);
 491             if ((*endptr != ',' || *(endptr + 1) != '\0') &&
 492                 *endptr != '\0')
 493                 goto err_out_parse_error;
 494             codec->guid.f3=strtoul(token[2],&endptr,0);
 495             if ((*endptr != ',' || *(endptr + 1) != '\0') &&
 496                 *endptr != '\0')
 497                 goto err_out_parse_error;
 498             for (i = 0; i < 8; i++) {
 499                 codec->guid.f4[i]=strtoul(token[i + 3],&endptr,0);
 500                 if ((*endptr != ',' || *(endptr + 1) != '\0') &&
 501                     *endptr != '\0')
 502                     goto err_out_parse_error;
 503             }
 504         } else if (!strcmp(token[0], "out")) {
 505             if (get_token(1, 2) < 0)
 506                 goto err_out_parse_error;
 507             if (!add_to_inout(token[0], token[1], codec->outfmt,
 508                               codec->outflags))
 509                 goto err_out_print_linenum;
 510         } else if (!strcmp(token[0], "in")) {
 511             if (get_token(1, 2) < 0)
 512                 goto err_out_parse_error;
 513             if (!add_to_inout(token[0], token[1], codec->infmt,
 514                               codec->inflags))
 515                 goto err_out_print_linenum;
 516         } else if (!strcmp(token[0], "flags")) {
 517             if (get_token(1, 1) < 0)
 518                 goto err_out_parse_error;
 519             if (!strcmp(token[0], "seekable"))
 520                 codec->flags |= CODECS_FLAG_SEEKABLE;
 521             else if (!strcmp(token[0], "align16"))
 522                 codec->flags |= CODECS_FLAG_ALIGN16;
 523             else
 524                 goto err_out_parse_error;
 525         } else if (!strcmp(token[0], "status")) {
 526             if (get_token(1, 1) < 0)
 527                 goto err_out_parse_error;
 528             if (!strcasecmp(token[0], "working"))
 529                 codec->status = CODECS_STATUS_WORKING;
 530             else if (!strcasecmp(token[0], "crashing"))
 531                 codec->status = CODECS_STATUS_NOT_WORKING;
 532             else if (!strcasecmp(token[0], "untested"))
 533                 codec->status = CODECS_STATUS_UNTESTED;
 534             else if (!strcasecmp(token[0], "buggy"))
 535                 codec->status = CODECS_STATUS_PROBLEMS;
 536             else
 537                 goto err_out_parse_error;
 538         } else if (!strcmp(token[0], "anyinput")) {
 539             codec->anyinput = true;
 540         } else
 541             goto err_out_parse_error;
 542     }
 543     if (!validate_codec(codec, codec_type))
 544         goto err_out_not_valid;
 545     mp_tmsg(MSGT_CODECCFG, MSGL_V, "%d audio & %d video codecs\n", nr_acodecs,
 546             nr_vcodecs);
 547     if(video_codecs) video_codecs[nr_vcodecs].name = NULL;
 548     if(audio_codecs) audio_codecs[nr_acodecs].name = NULL;
 549 out:
 550     talloc_free(tmpmem);
 551     line=NULL;
 552     return 1;
 553
 554 err_out_parse_error:
 555     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"parse error");
 556 err_out_print_linenum:
 557     PRINT_LINENUM;
 558 err_out:
 559     codecs_uninit_free();
 560
 561     talloc_free(tmpmem);
 562     line=NULL;
 563     line_num = 0;
 564     return 0;
 565 err_out_not_valid:
 566     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"Codec is not defined correctly.");
 567     goto err_out_print_linenum;
 568 err_out_release_num:
 569     mp_tmsg(MSGT_CODECCFG,MSGL_ERR,"This codecs.conf is too old and incompatible with this MPlayer release!");
 570     goto err_out_print_linenum;
 571 }
 572
 573 static void codecs_free(codecs_t* codecs,int count) {
 574     int i;
 575     for ( i = 0; i < count; i++)
 576         if ( codecs[i].name ) {
 577             free(codecs[i].name);
 578             free(codecs[i].info);
 579             free(codecs[i].comment);
 580             free(codecs[i].dll);
 581             free(codecs[i].drv);
 582         }
 583     free(codecs);
 584 }
 585
 586 void codecs_uninit_free(void) {
 587     if (video_codecs)
 588     codecs_free(video_codecs,nr_vcodecs);
 589     video_codecs=NULL;
 590     if (audio_codecs)
 591     codecs_free(audio_codecs,nr_acodecs);
 592     audio_codecs=NULL;
 593 }
 594
 595 codecs_t *find_audio_codec(unsigned int fourcc, unsigned int *fourccmap,
 596                            codecs_t *start, int force)
 597 {
 598     return find_codec(fourcc, fourccmap, start, 1, force);
 599 }
 600
 601 codecs_t *find_video_codec(unsigned int fourcc, unsigned int *fourccmap,
 602                            codecs_t *start, int force)
 603 {
 604     return find_codec(fourcc, fourccmap, start, 0, force);
 605 }
 606
 607 struct codecs *find_codec(unsigned int fourcc, unsigned int *fourccmap,
 608                           codecs_t *start, int audioflag, int force)
 609 {
 610     struct codecs *c, *end;
 611
 612     if (audioflag) {
 613         c = audio_codecs;
 614         end = c + nr_acodecs;
 615     } else {
 616         c = video_codecs;
 617         end = c + nr_vcodecs;
 618     }
 619     if (start)
 620         c = start + 1; // actually starts from the next one after the given one
 621     for (; c < end; c++) {
 622         for (int j = 0; j < CODECS_MAX_FOURCC; j++) {
 623             if (c->fourcc[j] == -1)
 624                 break;
 625             if (c->fourcc[j] == fourcc) {
 626                 if (fourccmap)
 627                     *fourccmap = c->fourccmap[j];
 628                 return c;
 629             }
 630         }
 631         if (c->anyinput || force)
 632             return c;
 633     }
 634     return NULL;
 635 }
 636
 637 void stringset_init(stringset_t *set) {
 638     *set = calloc(1, sizeof(char *));
 639 }
 640
 641 void stringset_free(stringset_t *set) {
 642     int count = 0;
 643     while ((*set)[count]) free((*set)[count++]);
 644     free(*set);
 645     *set = NULL;
 646 }
 647
 648 void stringset_add(stringset_t *set, const char *str) {
 649     int count = 0;
 650     while ((*set)[count]) count++;
 651     count++;
 652     *set = realloc(*set, sizeof(char *) * (count + 1));
 653     (*set)[count - 1] = strdup(str);
 654     (*set)[count] = NULL;
 655 }
 656
 657 int stringset_test(stringset_t *set, const char *str) {
 658     stringset_t s;
 659     for (s = *set; *s; s++)
 660         if (strcmp(*s, str) == 0)
 661             return 1;
 662     return 0;
 663 }
 664
 665 void list_codecs(int audioflag){
 666     int i;
 667     codecs_t *c;
 668
 669     if (audioflag) {
 670         i = nr_acodecs;
 671         c = audio_codecs;
 672         mp_msg(MSGT_CODECCFG,MSGL_INFO,"ac:     afm:      status:   info:  [lib/dll]\n");
 673     } else {
 674         i = nr_vcodecs;
 675         c = video_codecs;
 676         mp_msg(MSGT_CODECCFG,MSGL_INFO,"vc:     vfm:      status:   info:  [lib/dll]\n");
 677     }
 678     if(!i) return;
 679     for (/* NOTHING */; i--; c++) {
 680         char* s="unknown ";
 681         switch(c->status){
 682         case CODECS_STATUS_WORKING:     s="working ";break;
 683         case CODECS_STATUS_PROBLEMS:    s="problems";break;
 684         case CODECS_STATUS_NOT_WORKING: s="crashing";break;
 685         case CODECS_STATUS_UNTESTED:    s="untested";break;
 686         }
 687         if(c->dll)
 688             mp_msg(MSGT_CODECCFG,MSGL_INFO,"%-11s %-9s %s  %s  [%s]\n",c->name,c->drv,s,c->info,c->dll);
 689         else
 690             mp_msg(MSGT_CODECCFG,MSGL_INFO,"%-11s %-9s %s  %s\n",c->name,c->drv,s,c->info);
 691         }
 692 }