git.sesse.net Git - ffmpeg/blob - libavfilter/formats.c

   1 /*
   2  * Filter layer - format negotiation
   3  * Copyright (c) 2007 Bobby Bingham
   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 "libavutil/channel_layout.h"
  23 #include "libavutil/common.h"
  24 #include "libavutil/eval.h"
  25 #include "libavutil/pixdesc.h"
  26 #include "libavutil/parseutils.h"
  27 #include "avfilter.h"
  28 #include "internal.h"
  29 #include "formats.h"
  30
  31 /**
  32  * Add all refs from a to ret and destroy a.
  33  */
  34 #define MERGE_REF(ret, a, fmts, type, fail)                                \
  35 do {                                                                       \
  36     type ***tmp;                                                           \
  37     int i;                                                                 \
  38                                                                            \
  39     if (!(tmp = av_realloc(ret->refs,                                      \
  40                            sizeof(*tmp) * (ret->refcount + a->refcount)))) \
  41         goto fail;                                                         \
  42     ret->refs = tmp;                                                       \
  43                                                                            \
  44     for (i = 0; i < a->refcount; i ++) {                                   \
  45         ret->refs[ret->refcount] = a->refs[i];                             \
  46         *ret->refs[ret->refcount++] = ret;                                 \
  47     }                                                                      \
  48                                                                            \
  49     av_freep(&a->refs);                                                    \
  50     av_freep(&a->fmts);                                                    \
  51     av_freep(&a);                                                          \
  52 } while (0)
  53
  54 /**
  55  * Add all formats common for a and b to ret, copy the refs and destroy
  56  * a and b.
  57  */
  58 #define MERGE_FORMATS(ret, a, b, fmts, nb, type, fail)                          \
  59 do {                                                                            \
  60     int i, j, k = 0, count = FFMIN(a->nb, b->nb);                               \
  61                                                                                 \
  62     if (!(ret = av_mallocz(sizeof(*ret))))                                      \
  63         goto fail;                                                              \
  64                                                                                 \
  65     if (count) {                                                                \
  66         if (!(ret->fmts = av_malloc(sizeof(*ret->fmts) * count)))               \
  67             goto fail;                                                          \
  68         for (i = 0; i < a->nb; i++)                                             \
  69             for (j = 0; j < b->nb; j++)                                         \
  70                 if (a->fmts[i] == b->fmts[j]) {                                 \
  71                     if(k >= FFMIN(a->nb, b->nb)){                               \
  72                         av_log(NULL, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n"); \
  73                         av_free(ret->fmts);                                     \
  74                         av_free(ret);                                           \
  75                         return NULL;                                            \
  76                     }                                                           \
  77                     ret->fmts[k++] = a->fmts[i];                                \
  78                 }                                                               \
  79     }                                                                           \
  80     ret->nb = k;                                                                \
  81     /* check that there was at least one common format */                       \
  82     if (!ret->nb)                                                               \
  83         goto fail;                                                              \
  84                                                                                 \
  85     MERGE_REF(ret, a, fmts, type, fail);                                        \
  86     MERGE_REF(ret, b, fmts, type, fail);                                        \
  87 } while (0)
  88
  89 AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
  90 {
  91     AVFilterFormats *ret = NULL;
  92
  93     if (a == b)
  94         return a;
  95
  96     MERGE_FORMATS(ret, a, b, formats, format_count, AVFilterFormats, fail);
  97
  98     return ret;
  99 fail:
 100     if (ret) {
 101         av_freep(&ret->refs);
 102         av_freep(&ret->formats);
 103     }
 104     av_freep(&ret);
 105     return NULL;
 106 }
 107
 108 AVFilterFormats *ff_merge_samplerates(AVFilterFormats *a,
 109                                       AVFilterFormats *b)
 110 {
 111     AVFilterFormats *ret = NULL;
 112
 113     if (a == b) return a;
 114
 115     if (a->format_count && b->format_count) {
 116         MERGE_FORMATS(ret, a, b, formats, format_count, AVFilterFormats, fail);
 117     } else if (a->format_count) {
 118         MERGE_REF(a, b, formats, AVFilterFormats, fail);
 119         ret = a;
 120     } else {
 121         MERGE_REF(b, a, formats, AVFilterFormats, fail);
 122         ret = b;
 123     }
 124
 125     return ret;
 126 fail:
 127     if (ret) {
 128         av_freep(&ret->refs);
 129         av_freep(&ret->formats);
 130     }
 131     av_freep(&ret);
 132     return NULL;
 133 }
 134
 135 AVFilterChannelLayouts *ff_merge_channel_layouts(AVFilterChannelLayouts *a,
 136                                                  AVFilterChannelLayouts *b)
 137 {
 138     AVFilterChannelLayouts *ret = NULL;
 139
 140     if (a == b) return a;
 141
 142     if (a->nb_channel_layouts && b->nb_channel_layouts) {
 143         MERGE_FORMATS(ret, a, b, channel_layouts, nb_channel_layouts,
 144                       AVFilterChannelLayouts, fail);
 145     } else if (a->nb_channel_layouts) {
 146         MERGE_REF(a, b, channel_layouts, AVFilterChannelLayouts, fail);
 147         ret = a;
 148     } else {
 149         MERGE_REF(b, a, channel_layouts, AVFilterChannelLayouts, fail);
 150         ret = b;
 151     }
 152
 153     return ret;
 154 fail:
 155     if (ret) {
 156         av_freep(&ret->refs);
 157         av_freep(&ret->channel_layouts);
 158     }
 159     av_freep(&ret);
 160     return NULL;
 161 }
 162
 163 int ff_fmt_is_in(int fmt, const int *fmts)
 164 {
 165     const int *p;
 166
 167     for (p = fmts; *p != -1; p++) {
 168         if (fmt == *p)
 169             return 1;
 170     }
 171     return 0;
 172 }
 173
 174 #define COPY_INT_LIST(list_copy, list, type) {                          \
 175     int count = 0;                                                      \
 176     if (list)                                                           \
 177         for (count = 0; list[count] != -1; count++)                     \
 178             ;                                                           \
 179     list_copy = av_calloc(count+1, sizeof(type));                       \
 180     if (list_copy) {                                                    \
 181         memcpy(list_copy, list, sizeof(type) * count);                  \
 182         list_copy[count] = -1;                                          \
 183     }                                                                   \
 184 }
 185
 186 int *ff_copy_int_list(const int * const list)
 187 {
 188     int *ret = NULL;
 189     COPY_INT_LIST(ret, list, int);
 190     return ret;
 191 }
 192
 193 int64_t *ff_copy_int64_list(const int64_t * const list)
 194 {
 195     int64_t *ret = NULL;
 196     COPY_INT_LIST(ret, list, int64_t);
 197     return ret;
 198 }
 199
 200 #define MAKE_FORMAT_LIST(type, field, count_field)                      \
 201     type *formats;                                                      \
 202     int count = 0;                                                      \
 203     if (fmts)                                                           \
 204         for (count = 0; fmts[count] != -1; count++)                     \
 205             ;                                                           \
 206     formats = av_mallocz(sizeof(*formats));                             \
 207     if (!formats) return NULL;                                          \
 208     formats->count_field = count;                                       \
 209     if (count) {                                                        \
 210         formats->field = av_malloc(sizeof(*formats->field)*count);      \
 211         if (!formats->field) {                                          \
 212             av_free(formats);                                           \
 213             return NULL;                                                \
 214         }                                                               \
 215     }
 216
 217 AVFilterFormats *ff_make_format_list(const int *fmts)
 218 {
 219     MAKE_FORMAT_LIST(AVFilterFormats, formats, format_count);
 220     while (count--)
 221         formats->formats[count] = fmts[count];
 222
 223     return formats;
 224 }
 225
 226 AVFilterChannelLayouts *avfilter_make_format64_list(const int64_t *fmts)
 227 {
 228     MAKE_FORMAT_LIST(AVFilterChannelLayouts,
 229                      channel_layouts, nb_channel_layouts);
 230     if (count)
 231         memcpy(formats->channel_layouts, fmts,
 232                sizeof(*formats->channel_layouts) * count);
 233
 234     return formats;
 235 }
 236
 237 #define ADD_FORMAT(f, fmt, type, list, nb)                  \
 238 do {                                                        \
 239     type *fmts;                                             \
 240                                                             \
 241     if (!(*f) && !(*f = av_mallocz(sizeof(**f))))           \
 242         return AVERROR(ENOMEM);                             \
 243                                                             \
 244     fmts = av_realloc((*f)->list,                           \
 245                       sizeof(*(*f)->list) * ((*f)->nb + 1));\
 246     if (!fmts)                                              \
 247         return AVERROR(ENOMEM);                             \
 248                                                             \
 249     (*f)->list = fmts;                                      \
 250     (*f)->list[(*f)->nb++] = fmt;                           \
 251     return 0;                                               \
 252 } while (0)
 253
 254 int ff_add_format(AVFilterFormats **avff, int64_t fmt)
 255 {
 256     ADD_FORMAT(avff, fmt, int, formats, format_count);
 257 }
 258
 259 int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
 260 {
 261     ADD_FORMAT(l, channel_layout, uint64_t, channel_layouts, nb_channel_layouts);
 262 }
 263
 264 AVFilterFormats *ff_all_formats(enum AVMediaType type)
 265 {
 266     AVFilterFormats *ret = NULL;
 267     int fmt;
 268     int num_formats = type == AVMEDIA_TYPE_VIDEO ? AV_PIX_FMT_NB    :
 269                       type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
 270
 271     for (fmt = 0; fmt < num_formats; fmt++) {
 272         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
 273         if ((type != AVMEDIA_TYPE_VIDEO) ||
 274             (type == AVMEDIA_TYPE_VIDEO && !(desc->flags & PIX_FMT_HWACCEL)))
 275             ff_add_format(&ret, fmt);
 276     }
 277
 278     return ret;
 279 }
 280
 281 const int64_t avfilter_all_channel_layouts[] = {
 282 #include "all_channel_layouts.inc"
 283     -1
 284 };
 285
 286 // AVFilterFormats *avfilter_make_all_channel_layouts(void)
 287 // {
 288 //     return avfilter_make_format64_list(avfilter_all_channel_layouts);
 289 // }
 290
 291 AVFilterFormats *ff_planar_sample_fmts(void)
 292 {
 293     AVFilterFormats *ret = NULL;
 294     int fmt;
 295
 296     for (fmt = 0; fmt < AV_SAMPLE_FMT_NB; fmt++)
 297         if (av_sample_fmt_is_planar(fmt))
 298             ff_add_format(&ret, fmt);
 299
 300     return ret;
 301 }
 302
 303 AVFilterFormats *ff_all_samplerates(void)
 304 {
 305     AVFilterFormats *ret = av_mallocz(sizeof(*ret));
 306     return ret;
 307 }
 308
 309 AVFilterChannelLayouts *ff_all_channel_layouts(void)
 310 {
 311     AVFilterChannelLayouts *ret = av_mallocz(sizeof(*ret));
 312     return ret;
 313 }
 314
 315 #define FORMATS_REF(f, ref)                                          \
 316 do {                                                                 \
 317     *ref = f;                                                        \
 318     f->refs = av_realloc(f->refs, sizeof(*f->refs) * ++f->refcount); \
 319     f->refs[f->refcount-1] = ref;                                    \
 320 } while (0)
 321
 322 void ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
 323 {
 324     FORMATS_REF(f, ref);
 325 }
 326
 327 void ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
 328 {
 329     FORMATS_REF(f, ref);
 330 }
 331
 332 #define FIND_REF_INDEX(ref, idx)            \
 333 do {                                        \
 334     int i;                                  \
 335     for (i = 0; i < (*ref)->refcount; i ++) \
 336         if((*ref)->refs[i] == ref) {        \
 337             idx = i;                        \
 338             break;                          \
 339         }                                   \
 340 } while (0)
 341
 342 #define FORMATS_UNREF(ref, list)                                   \
 343 do {                                                               \
 344     int idx = -1;                                                  \
 345                                                                    \
 346     if (!*ref)                                                     \
 347         return;                                                    \
 348                                                                    \
 349     FIND_REF_INDEX(ref, idx);                                      \
 350                                                                    \
 351     if (idx >= 0)                                                  \
 352         memmove((*ref)->refs + idx, (*ref)->refs + idx + 1,        \
 353             sizeof(*(*ref)->refs) * ((*ref)->refcount - idx - 1)); \
 354                                                                    \
 355     if(!--(*ref)->refcount) {                                      \
 356         av_free((*ref)->list);                                     \
 357         av_free((*ref)->refs);                                     \
 358         av_free(*ref);                                             \
 359     }                                                              \
 360     *ref = NULL;                                                   \
 361 } while (0)
 362
 363 void ff_formats_unref(AVFilterFormats **ref)
 364 {
 365     FORMATS_UNREF(ref, formats);
 366 }
 367
 368 void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
 369 {
 370     FORMATS_UNREF(ref, channel_layouts);
 371 }
 372
 373 #define FORMATS_CHANGEREF(oldref, newref)       \
 374 do {                                            \
 375     int idx = -1;                               \
 376                                                 \
 377     FIND_REF_INDEX(oldref, idx);                \
 378                                                 \
 379     if (idx >= 0) {                             \
 380         (*oldref)->refs[idx] = newref;          \
 381         *newref = *oldref;                      \
 382         *oldref = NULL;                         \
 383     }                                           \
 384 } while (0)
 385
 386 void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref,
 387                                   AVFilterChannelLayouts **newref)
 388 {
 389     FORMATS_CHANGEREF(oldref, newref);
 390 }
 391
 392 void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
 393 {
 394     FORMATS_CHANGEREF(oldref, newref);
 395 }
 396
 397 #define SET_COMMON_FORMATS(ctx, fmts, in_fmts, out_fmts, ref, list) \
 398 {                                                                   \
 399     int count = 0, i;                                               \
 400                                                                     \
 401     for (i = 0; i < ctx->nb_inputs; i++) {                          \
 402         if (ctx->inputs[i] && !ctx->inputs[i]->out_fmts) {          \
 403             ref(fmts, &ctx->inputs[i]->out_fmts);                   \
 404             count++;                                                \
 405         }                                                           \
 406     }                                                               \
 407     for (i = 0; i < ctx->nb_outputs; i++) {                         \
 408         if (ctx->outputs[i] && !ctx->outputs[i]->in_fmts) {         \
 409             ref(fmts, &ctx->outputs[i]->in_fmts);                   \
 410             count++;                                                \
 411         }                                                           \
 412     }                                                               \
 413                                                                     \
 414     if (!count) {                                                   \
 415         av_freep(&fmts->list);                                      \
 416         av_freep(&fmts->refs);                                      \
 417         av_freep(&fmts);                                            \
 418     }                                                               \
 419 }
 420
 421 void ff_set_common_channel_layouts(AVFilterContext *ctx,
 422                                    AVFilterChannelLayouts *layouts)
 423 {
 424     SET_COMMON_FORMATS(ctx, layouts, in_channel_layouts, out_channel_layouts,
 425                        ff_channel_layouts_ref, channel_layouts);
 426 }
 427
 428 void ff_set_common_samplerates(AVFilterContext *ctx,
 429                                AVFilterFormats *samplerates)
 430 {
 431     SET_COMMON_FORMATS(ctx, samplerates, in_samplerates, out_samplerates,
 432                        ff_formats_ref, formats);
 433 }
 434
 435 /**
 436  * A helper for query_formats() which sets all links to the same list of
 437  * formats. If there are no links hooked to this filter, the list of formats is
 438  * freed.
 439  */
 440 void ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
 441 {
 442     SET_COMMON_FORMATS(ctx, formats, in_formats, out_formats,
 443                        ff_formats_ref, formats);
 444 }
 445
 446 int ff_default_query_formats(AVFilterContext *ctx)
 447 {
 448     enum AVMediaType type = ctx->inputs  && ctx->inputs [0] ? ctx->inputs [0]->type :
 449                             ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type :
 450                             AVMEDIA_TYPE_VIDEO;
 451
 452     ff_set_common_formats(ctx, ff_all_formats(type));
 453     if (type == AVMEDIA_TYPE_AUDIO) {
 454         ff_set_common_channel_layouts(ctx, ff_all_channel_layouts());
 455         ff_set_common_samplerates(ctx, ff_all_samplerates());
 456     }
 457
 458     return 0;
 459 }
 460
 461 /* internal functions for parsing audio format arguments */
 462
 463 int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx)
 464 {
 465     char *tail;
 466     int pix_fmt = av_get_pix_fmt(arg);
 467     if (pix_fmt == AV_PIX_FMT_NONE) {
 468         pix_fmt = strtol(arg, &tail, 0);
 469         if (*tail || (unsigned)pix_fmt >= AV_PIX_FMT_NB) {
 470             av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg);
 471             return AVERROR(EINVAL);
 472         }
 473     }
 474     *ret = pix_fmt;
 475     return 0;
 476 }
 477
 478 int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx)
 479 {
 480     char *tail;
 481     int sfmt = av_get_sample_fmt(arg);
 482     if (sfmt == AV_SAMPLE_FMT_NONE) {
 483         sfmt = strtol(arg, &tail, 0);
 484         if (*tail || (unsigned)sfmt >= AV_SAMPLE_FMT_NB) {
 485             av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
 486             return AVERROR(EINVAL);
 487         }
 488     }
 489     *ret = sfmt;
 490     return 0;
 491 }
 492
 493 int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx)
 494 {
 495     AVRational r;
 496     if(av_parse_ratio(&r, arg, INT_MAX, 0, log_ctx) < 0 ||r.num<=0  ||r.den<=0) {
 497         av_log(log_ctx, AV_LOG_ERROR, "Invalid time base '%s'\n", arg);
 498         return AVERROR(EINVAL);
 499     }
 500     *ret = r;
 501     return 0;
 502 }
 503
 504 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
 505 {
 506     char *tail;
 507     double srate = av_strtod(arg, &tail);
 508     if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) {
 509         av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg);
 510         return AVERROR(EINVAL);
 511     }
 512     *ret = srate;
 513     return 0;
 514 }
 515
 516 int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx)
 517 {
 518     char *tail;
 519     int64_t chlayout = av_get_channel_layout(arg);
 520     if (chlayout == 0) {
 521         chlayout = strtol(arg, &tail, 10);
 522         if (*tail || chlayout == 0) {
 523             av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
 524             return AVERROR(EINVAL);
 525         }
 526     }
 527     *ret = chlayout;
 528     return 0;
 529 }
 530
 531 #ifdef TEST
 532
 533 #undef printf
 534
 535 int main(void)
 536 {
 537     const int64_t *cl;
 538     char buf[512];
 539
 540     for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
 541         av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
 542         printf("%s\n", buf);
 543     }
 544
 545     return 0;
 546 }
 547
 548 #endif
 549