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