| 1 | /* |
| 2 | * filter layer |
| 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/atomic.h" |
| 23 | #include "libavutil/avassert.h" |
| 24 | #include "libavutil/avstring.h" |
| 25 | #include "libavutil/channel_layout.h" |
| 26 | #include "libavutil/common.h" |
| 27 | #include "libavutil/eval.h" |
| 28 | #include "libavutil/imgutils.h" |
| 29 | #include "libavutil/internal.h" |
| 30 | #include "libavutil/opt.h" |
| 31 | #include "libavutil/pixdesc.h" |
| 32 | #include "libavutil/rational.h" |
| 33 | #include "libavutil/samplefmt.h" |
| 34 | |
| 35 | #include "audio.h" |
| 36 | #include "avfilter.h" |
| 37 | #include "formats.h" |
| 38 | #include "internal.h" |
| 39 | |
| 40 | static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame); |
| 41 | |
| 42 | void ff_tlog_ref(void *ctx, AVFrame *ref, int end) |
| 43 | { |
| 44 | av_unused char buf[16]; |
| 45 | ff_tlog(ctx, |
| 46 | "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64, |
| 47 | ref, ref->buf, ref->data[0], |
| 48 | ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3], |
| 49 | ref->pts, av_frame_get_pkt_pos(ref)); |
| 50 | |
| 51 | if (ref->width) { |
| 52 | ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c", |
| 53 | ref->sample_aspect_ratio.num, ref->sample_aspect_ratio.den, |
| 54 | ref->width, ref->height, |
| 55 | !ref->interlaced_frame ? 'P' : /* Progressive */ |
| 56 | ref->top_field_first ? 'T' : 'B', /* Top / Bottom */ |
| 57 | ref->key_frame, |
| 58 | av_get_picture_type_char(ref->pict_type)); |
| 59 | } |
| 60 | if (ref->nb_samples) { |
| 61 | ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d", |
| 62 | ref->channel_layout, |
| 63 | ref->nb_samples, |
| 64 | ref->sample_rate); |
| 65 | } |
| 66 | |
| 67 | ff_tlog(ctx, "]%s", end ? "\n" : ""); |
| 68 | } |
| 69 | |
| 70 | unsigned avfilter_version(void) |
| 71 | { |
| 72 | av_assert0(LIBAVFILTER_VERSION_MICRO >= 100); |
| 73 | return LIBAVFILTER_VERSION_INT; |
| 74 | } |
| 75 | |
| 76 | const char *avfilter_configuration(void) |
| 77 | { |
| 78 | return FFMPEG_CONFIGURATION; |
| 79 | } |
| 80 | |
| 81 | const char *avfilter_license(void) |
| 82 | { |
| 83 | #define LICENSE_PREFIX "libavfilter license: " |
| 84 | return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
| 85 | } |
| 86 | |
| 87 | void ff_command_queue_pop(AVFilterContext *filter) |
| 88 | { |
| 89 | AVFilterCommand *c= filter->command_queue; |
| 90 | av_freep(&c->arg); |
| 91 | av_freep(&c->command); |
| 92 | filter->command_queue= c->next; |
| 93 | av_free(c); |
| 94 | } |
| 95 | |
| 96 | int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, |
| 97 | AVFilterPad **pads, AVFilterLink ***links, |
| 98 | AVFilterPad *newpad) |
| 99 | { |
| 100 | AVFilterLink **newlinks; |
| 101 | AVFilterPad *newpads; |
| 102 | unsigned i; |
| 103 | |
| 104 | idx = FFMIN(idx, *count); |
| 105 | |
| 106 | newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad)); |
| 107 | newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*)); |
| 108 | if (newpads) |
| 109 | *pads = newpads; |
| 110 | if (newlinks) |
| 111 | *links = newlinks; |
| 112 | if (!newpads || !newlinks) |
| 113 | return AVERROR(ENOMEM); |
| 114 | |
| 115 | memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx)); |
| 116 | memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx)); |
| 117 | memcpy(*pads + idx, newpad, sizeof(AVFilterPad)); |
| 118 | (*links)[idx] = NULL; |
| 119 | |
| 120 | (*count)++; |
| 121 | for (i = idx + 1; i < *count; i++) |
| 122 | if ((*links)[i]) |
| 123 | (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++; |
| 124 | |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | int avfilter_link(AVFilterContext *src, unsigned srcpad, |
| 129 | AVFilterContext *dst, unsigned dstpad) |
| 130 | { |
| 131 | AVFilterLink *link; |
| 132 | |
| 133 | if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad || |
| 134 | src->outputs[srcpad] || dst->inputs[dstpad]) |
| 135 | return -1; |
| 136 | |
| 137 | if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) { |
| 138 | av_log(src, AV_LOG_ERROR, |
| 139 | "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n", |
| 140 | src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"), |
| 141 | dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?")); |
| 142 | return AVERROR(EINVAL); |
| 143 | } |
| 144 | |
| 145 | link = av_mallocz(sizeof(*link)); |
| 146 | if (!link) |
| 147 | return AVERROR(ENOMEM); |
| 148 | |
| 149 | src->outputs[srcpad] = dst->inputs[dstpad] = link; |
| 150 | |
| 151 | link->src = src; |
| 152 | link->dst = dst; |
| 153 | link->srcpad = &src->output_pads[srcpad]; |
| 154 | link->dstpad = &dst->input_pads[dstpad]; |
| 155 | link->type = src->output_pads[srcpad].type; |
| 156 | av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1); |
| 157 | link->format = -1; |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | void avfilter_link_free(AVFilterLink **link) |
| 163 | { |
| 164 | if (!*link) |
| 165 | return; |
| 166 | |
| 167 | av_frame_free(&(*link)->partial_buf); |
| 168 | |
| 169 | av_freep(link); |
| 170 | } |
| 171 | |
| 172 | int avfilter_link_get_channels(AVFilterLink *link) |
| 173 | { |
| 174 | return link->channels; |
| 175 | } |
| 176 | |
| 177 | void avfilter_link_set_closed(AVFilterLink *link, int closed) |
| 178 | { |
| 179 | link->closed = closed; |
| 180 | } |
| 181 | |
| 182 | int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, |
| 183 | unsigned filt_srcpad_idx, unsigned filt_dstpad_idx) |
| 184 | { |
| 185 | int ret; |
| 186 | unsigned dstpad_idx = link->dstpad - link->dst->input_pads; |
| 187 | |
| 188 | av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' " |
| 189 | "between the filter '%s' and the filter '%s'\n", |
| 190 | filt->name, link->src->name, link->dst->name); |
| 191 | |
| 192 | link->dst->inputs[dstpad_idx] = NULL; |
| 193 | if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) { |
| 194 | /* failed to link output filter to new filter */ |
| 195 | link->dst->inputs[dstpad_idx] = link; |
| 196 | return ret; |
| 197 | } |
| 198 | |
| 199 | /* re-hookup the link to the new destination filter we inserted */ |
| 200 | link->dst = filt; |
| 201 | link->dstpad = &filt->input_pads[filt_srcpad_idx]; |
| 202 | filt->inputs[filt_srcpad_idx] = link; |
| 203 | |
| 204 | /* if any information on supported media formats already exists on the |
| 205 | * link, we need to preserve that */ |
| 206 | if (link->out_formats) |
| 207 | ff_formats_changeref(&link->out_formats, |
| 208 | &filt->outputs[filt_dstpad_idx]->out_formats); |
| 209 | if (link->out_samplerates) |
| 210 | ff_formats_changeref(&link->out_samplerates, |
| 211 | &filt->outputs[filt_dstpad_idx]->out_samplerates); |
| 212 | if (link->out_channel_layouts) |
| 213 | ff_channel_layouts_changeref(&link->out_channel_layouts, |
| 214 | &filt->outputs[filt_dstpad_idx]->out_channel_layouts); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | int avfilter_config_links(AVFilterContext *filter) |
| 220 | { |
| 221 | int (*config_link)(AVFilterLink *); |
| 222 | unsigned i; |
| 223 | int ret; |
| 224 | |
| 225 | for (i = 0; i < filter->nb_inputs; i ++) { |
| 226 | AVFilterLink *link = filter->inputs[i]; |
| 227 | AVFilterLink *inlink; |
| 228 | |
| 229 | if (!link) continue; |
| 230 | |
| 231 | inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL; |
| 232 | link->current_pts = AV_NOPTS_VALUE; |
| 233 | |
| 234 | switch (link->init_state) { |
| 235 | case AVLINK_INIT: |
| 236 | continue; |
| 237 | case AVLINK_STARTINIT: |
| 238 | av_log(filter, AV_LOG_INFO, "circular filter chain detected\n"); |
| 239 | return 0; |
| 240 | case AVLINK_UNINIT: |
| 241 | link->init_state = AVLINK_STARTINIT; |
| 242 | |
| 243 | if ((ret = avfilter_config_links(link->src)) < 0) |
| 244 | return ret; |
| 245 | |
| 246 | if (!(config_link = link->srcpad->config_props)) { |
| 247 | if (link->src->nb_inputs != 1) { |
| 248 | av_log(link->src, AV_LOG_ERROR, "Source filters and filters " |
| 249 | "with more than one input " |
| 250 | "must set config_props() " |
| 251 | "callbacks on all outputs\n"); |
| 252 | return AVERROR(EINVAL); |
| 253 | } |
| 254 | } else if ((ret = config_link(link)) < 0) { |
| 255 | av_log(link->src, AV_LOG_ERROR, |
| 256 | "Failed to configure output pad on %s\n", |
| 257 | link->src->name); |
| 258 | return ret; |
| 259 | } |
| 260 | |
| 261 | switch (link->type) { |
| 262 | case AVMEDIA_TYPE_VIDEO: |
| 263 | if (!link->time_base.num && !link->time_base.den) |
| 264 | link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q; |
| 265 | |
| 266 | if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den) |
| 267 | link->sample_aspect_ratio = inlink ? |
| 268 | inlink->sample_aspect_ratio : (AVRational){1,1}; |
| 269 | |
| 270 | if (inlink && !link->frame_rate.num && !link->frame_rate.den) |
| 271 | link->frame_rate = inlink->frame_rate; |
| 272 | |
| 273 | if (inlink) { |
| 274 | if (!link->w) |
| 275 | link->w = inlink->w; |
| 276 | if (!link->h) |
| 277 | link->h = inlink->h; |
| 278 | } else if (!link->w || !link->h) { |
| 279 | av_log(link->src, AV_LOG_ERROR, |
| 280 | "Video source filters must set their output link's " |
| 281 | "width and height\n"); |
| 282 | return AVERROR(EINVAL); |
| 283 | } |
| 284 | break; |
| 285 | |
| 286 | case AVMEDIA_TYPE_AUDIO: |
| 287 | if (inlink) { |
| 288 | if (!link->time_base.num && !link->time_base.den) |
| 289 | link->time_base = inlink->time_base; |
| 290 | } |
| 291 | |
| 292 | if (!link->time_base.num && !link->time_base.den) |
| 293 | link->time_base = (AVRational) {1, link->sample_rate}; |
| 294 | } |
| 295 | |
| 296 | if ((config_link = link->dstpad->config_props)) |
| 297 | if ((ret = config_link(link)) < 0) { |
| 298 | av_log(link->dst, AV_LOG_ERROR, |
| 299 | "Failed to configure input pad on %s\n", |
| 300 | link->dst->name); |
| 301 | return ret; |
| 302 | } |
| 303 | |
| 304 | link->init_state = AVLINK_INIT; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | void ff_tlog_link(void *ctx, AVFilterLink *link, int end) |
| 312 | { |
| 313 | if (link->type == AVMEDIA_TYPE_VIDEO) { |
| 314 | ff_tlog(ctx, |
| 315 | "link[%p s:%dx%d fmt:%s %s->%s]%s", |
| 316 | link, link->w, link->h, |
| 317 | av_get_pix_fmt_name(link->format), |
| 318 | link->src ? link->src->filter->name : "", |
| 319 | link->dst ? link->dst->filter->name : "", |
| 320 | end ? "\n" : ""); |
| 321 | } else { |
| 322 | char buf[128]; |
| 323 | av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout); |
| 324 | |
| 325 | ff_tlog(ctx, |
| 326 | "link[%p r:%d cl:%s fmt:%s %s->%s]%s", |
| 327 | link, (int)link->sample_rate, buf, |
| 328 | av_get_sample_fmt_name(link->format), |
| 329 | link->src ? link->src->filter->name : "", |
| 330 | link->dst ? link->dst->filter->name : "", |
| 331 | end ? "\n" : ""); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | int ff_request_frame(AVFilterLink *link) |
| 336 | { |
| 337 | int ret = -1; |
| 338 | FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1); |
| 339 | |
| 340 | if (link->closed) |
| 341 | return AVERROR_EOF; |
| 342 | av_assert0(!link->frame_requested); |
| 343 | link->frame_requested = 1; |
| 344 | while (link->frame_requested) { |
| 345 | if (link->srcpad->request_frame) |
| 346 | ret = link->srcpad->request_frame(link); |
| 347 | else if (link->src->inputs[0]) |
| 348 | ret = ff_request_frame(link->src->inputs[0]); |
| 349 | if (ret == AVERROR_EOF && link->partial_buf) { |
| 350 | AVFrame *pbuf = link->partial_buf; |
| 351 | link->partial_buf = NULL; |
| 352 | ret = ff_filter_frame_framed(link, pbuf); |
| 353 | } |
| 354 | if (ret < 0) { |
| 355 | link->frame_requested = 0; |
| 356 | if (ret == AVERROR_EOF) |
| 357 | link->closed = 1; |
| 358 | } else { |
| 359 | av_assert0(!link->frame_requested || |
| 360 | link->flags & FF_LINK_FLAG_REQUEST_LOOP); |
| 361 | } |
| 362 | } |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | int ff_poll_frame(AVFilterLink *link) |
| 367 | { |
| 368 | int i, min = INT_MAX; |
| 369 | |
| 370 | if (link->srcpad->poll_frame) |
| 371 | return link->srcpad->poll_frame(link); |
| 372 | |
| 373 | for (i = 0; i < link->src->nb_inputs; i++) { |
| 374 | int val; |
| 375 | if (!link->src->inputs[i]) |
| 376 | return -1; |
| 377 | val = ff_poll_frame(link->src->inputs[i]); |
| 378 | min = FFMIN(min, val); |
| 379 | } |
| 380 | |
| 381 | return min; |
| 382 | } |
| 383 | |
| 384 | static const char *const var_names[] = { "t", "n", "pos", NULL }; |
| 385 | enum { VAR_T, VAR_N, VAR_POS, VAR_VARS_NB }; |
| 386 | |
| 387 | static int set_enable_expr(AVFilterContext *ctx, const char *expr) |
| 388 | { |
| 389 | int ret; |
| 390 | char *expr_dup; |
| 391 | AVExpr *old = ctx->enable; |
| 392 | |
| 393 | if (!(ctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE)) { |
| 394 | av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported " |
| 395 | "with filter '%s'\n", ctx->filter->name); |
| 396 | return AVERROR_PATCHWELCOME; |
| 397 | } |
| 398 | |
| 399 | expr_dup = av_strdup(expr); |
| 400 | if (!expr_dup) |
| 401 | return AVERROR(ENOMEM); |
| 402 | |
| 403 | if (!ctx->var_values) { |
| 404 | ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values)); |
| 405 | if (!ctx->var_values) { |
| 406 | av_free(expr_dup); |
| 407 | return AVERROR(ENOMEM); |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names, |
| 412 | NULL, NULL, NULL, NULL, 0, ctx->priv); |
| 413 | if (ret < 0) { |
| 414 | av_log(ctx->priv, AV_LOG_ERROR, |
| 415 | "Error when evaluating the expression '%s' for enable\n", |
| 416 | expr_dup); |
| 417 | av_free(expr_dup); |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | av_expr_free(old); |
| 422 | av_free(ctx->enable_str); |
| 423 | ctx->enable_str = expr_dup; |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | void ff_update_link_current_pts(AVFilterLink *link, int64_t pts) |
| 428 | { |
| 429 | if (pts == AV_NOPTS_VALUE) |
| 430 | return; |
| 431 | link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q); |
| 432 | /* TODO use duration */ |
| 433 | if (link->graph && link->age_index >= 0) |
| 434 | ff_avfilter_graph_update_heap(link->graph, link); |
| 435 | } |
| 436 | |
| 437 | int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags) |
| 438 | { |
| 439 | if(!strcmp(cmd, "ping")){ |
| 440 | char local_res[256] = {0}; |
| 441 | |
| 442 | if (!res) { |
| 443 | res = local_res; |
| 444 | res_len = sizeof(local_res); |
| 445 | } |
| 446 | av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name); |
| 447 | if (res == local_res) |
| 448 | av_log(filter, AV_LOG_INFO, "%s", res); |
| 449 | return 0; |
| 450 | }else if(!strcmp(cmd, "enable")) { |
| 451 | return set_enable_expr(filter, arg); |
| 452 | }else if(filter->filter->process_command) { |
| 453 | return filter->filter->process_command(filter, cmd, arg, res, res_len, flags); |
| 454 | } |
| 455 | return AVERROR(ENOSYS); |
| 456 | } |
| 457 | |
| 458 | static AVFilter *first_filter; |
| 459 | static AVFilter **last_filter = &first_filter; |
| 460 | |
| 461 | #if !FF_API_NOCONST_GET_NAME |
| 462 | const |
| 463 | #endif |
| 464 | AVFilter *avfilter_get_by_name(const char *name) |
| 465 | { |
| 466 | const AVFilter *f = NULL; |
| 467 | |
| 468 | if (!name) |
| 469 | return NULL; |
| 470 | |
| 471 | while ((f = avfilter_next(f))) |
| 472 | if (!strcmp(f->name, name)) |
| 473 | return (AVFilter *)f; |
| 474 | |
| 475 | return NULL; |
| 476 | } |
| 477 | |
| 478 | int avfilter_register(AVFilter *filter) |
| 479 | { |
| 480 | AVFilter **f = last_filter; |
| 481 | int i; |
| 482 | |
| 483 | /* the filter must select generic or internal exclusively */ |
| 484 | av_assert0((filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE) != AVFILTER_FLAG_SUPPORT_TIMELINE); |
| 485 | |
| 486 | for(i=0; filter->inputs && filter->inputs[i].name; i++) { |
| 487 | const AVFilterPad *input = &filter->inputs[i]; |
| 488 | av_assert0( !input->filter_frame |
| 489 | || (!input->start_frame && !input->end_frame)); |
| 490 | } |
| 491 | |
| 492 | filter->next = NULL; |
| 493 | |
| 494 | while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter)) |
| 495 | f = &(*f)->next; |
| 496 | last_filter = &filter->next; |
| 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | const AVFilter *avfilter_next(const AVFilter *prev) |
| 502 | { |
| 503 | return prev ? prev->next : first_filter; |
| 504 | } |
| 505 | |
| 506 | #if FF_API_OLD_FILTER_REGISTER |
| 507 | AVFilter **av_filter_next(AVFilter **filter) |
| 508 | { |
| 509 | return filter ? &(*filter)->next : &first_filter; |
| 510 | } |
| 511 | |
| 512 | void avfilter_uninit(void) |
| 513 | { |
| 514 | } |
| 515 | #endif |
| 516 | |
| 517 | int avfilter_pad_count(const AVFilterPad *pads) |
| 518 | { |
| 519 | int count; |
| 520 | |
| 521 | if (!pads) |
| 522 | return 0; |
| 523 | |
| 524 | for (count = 0; pads->name; count++) |
| 525 | pads++; |
| 526 | return count; |
| 527 | } |
| 528 | |
| 529 | static const char *default_filter_name(void *filter_ctx) |
| 530 | { |
| 531 | AVFilterContext *ctx = filter_ctx; |
| 532 | return ctx->name ? ctx->name : ctx->filter->name; |
| 533 | } |
| 534 | |
| 535 | static void *filter_child_next(void *obj, void *prev) |
| 536 | { |
| 537 | AVFilterContext *ctx = obj; |
| 538 | if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv) |
| 539 | return ctx->priv; |
| 540 | return NULL; |
| 541 | } |
| 542 | |
| 543 | static const AVClass *filter_child_class_next(const AVClass *prev) |
| 544 | { |
| 545 | const AVFilter *f = NULL; |
| 546 | |
| 547 | /* find the filter that corresponds to prev */ |
| 548 | while (prev && (f = avfilter_next(f))) |
| 549 | if (f->priv_class == prev) |
| 550 | break; |
| 551 | |
| 552 | /* could not find filter corresponding to prev */ |
| 553 | if (prev && !f) |
| 554 | return NULL; |
| 555 | |
| 556 | /* find next filter with specific options */ |
| 557 | while ((f = avfilter_next(f))) |
| 558 | if (f->priv_class) |
| 559 | return f->priv_class; |
| 560 | |
| 561 | return NULL; |
| 562 | } |
| 563 | |
| 564 | #define OFFSET(x) offsetof(AVFilterContext, x) |
| 565 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM |
| 566 | static const AVOption avfilter_options[] = { |
| 567 | { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS, |
| 568 | { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" }, |
| 569 | { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" }, |
| 570 | { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS }, |
| 571 | { NULL }, |
| 572 | }; |
| 573 | |
| 574 | static const AVClass avfilter_class = { |
| 575 | .class_name = "AVFilter", |
| 576 | .item_name = default_filter_name, |
| 577 | .version = LIBAVUTIL_VERSION_INT, |
| 578 | .category = AV_CLASS_CATEGORY_FILTER, |
| 579 | .child_next = filter_child_next, |
| 580 | .child_class_next = filter_child_class_next, |
| 581 | .option = avfilter_options, |
| 582 | }; |
| 583 | |
| 584 | static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, |
| 585 | int *ret, int nb_jobs) |
| 586 | { |
| 587 | int i; |
| 588 | |
| 589 | for (i = 0; i < nb_jobs; i++) { |
| 590 | int r = func(ctx, arg, i, nb_jobs); |
| 591 | if (ret) |
| 592 | ret[i] = r; |
| 593 | } |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name) |
| 598 | { |
| 599 | AVFilterContext *ret; |
| 600 | |
| 601 | if (!filter) |
| 602 | return NULL; |
| 603 | |
| 604 | ret = av_mallocz(sizeof(AVFilterContext)); |
| 605 | if (!ret) |
| 606 | return NULL; |
| 607 | |
| 608 | ret->av_class = &avfilter_class; |
| 609 | ret->filter = filter; |
| 610 | ret->name = inst_name ? av_strdup(inst_name) : NULL; |
| 611 | if (filter->priv_size) { |
| 612 | ret->priv = av_mallocz(filter->priv_size); |
| 613 | if (!ret->priv) |
| 614 | goto err; |
| 615 | } |
| 616 | |
| 617 | av_opt_set_defaults(ret); |
| 618 | if (filter->priv_class) { |
| 619 | *(const AVClass**)ret->priv = filter->priv_class; |
| 620 | av_opt_set_defaults(ret->priv); |
| 621 | } |
| 622 | |
| 623 | ret->internal = av_mallocz(sizeof(*ret->internal)); |
| 624 | if (!ret->internal) |
| 625 | goto err; |
| 626 | ret->internal->execute = default_execute; |
| 627 | |
| 628 | ret->nb_inputs = avfilter_pad_count(filter->inputs); |
| 629 | if (ret->nb_inputs ) { |
| 630 | ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad)); |
| 631 | if (!ret->input_pads) |
| 632 | goto err; |
| 633 | memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs); |
| 634 | ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*)); |
| 635 | if (!ret->inputs) |
| 636 | goto err; |
| 637 | } |
| 638 | |
| 639 | ret->nb_outputs = avfilter_pad_count(filter->outputs); |
| 640 | if (ret->nb_outputs) { |
| 641 | ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad)); |
| 642 | if (!ret->output_pads) |
| 643 | goto err; |
| 644 | memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs); |
| 645 | ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*)); |
| 646 | if (!ret->outputs) |
| 647 | goto err; |
| 648 | } |
| 649 | #if FF_API_FOO_COUNT |
| 650 | FF_DISABLE_DEPRECATION_WARNINGS |
| 651 | ret->output_count = ret->nb_outputs; |
| 652 | ret->input_count = ret->nb_inputs; |
| 653 | FF_ENABLE_DEPRECATION_WARNINGS |
| 654 | #endif |
| 655 | |
| 656 | return ret; |
| 657 | |
| 658 | err: |
| 659 | av_freep(&ret->inputs); |
| 660 | av_freep(&ret->input_pads); |
| 661 | ret->nb_inputs = 0; |
| 662 | av_freep(&ret->outputs); |
| 663 | av_freep(&ret->output_pads); |
| 664 | ret->nb_outputs = 0; |
| 665 | av_freep(&ret->priv); |
| 666 | av_freep(&ret->internal); |
| 667 | av_free(ret); |
| 668 | return NULL; |
| 669 | } |
| 670 | |
| 671 | #if FF_API_AVFILTER_OPEN |
| 672 | int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name) |
| 673 | { |
| 674 | *filter_ctx = ff_filter_alloc(filter, inst_name); |
| 675 | return *filter_ctx ? 0 : AVERROR(ENOMEM); |
| 676 | } |
| 677 | #endif |
| 678 | |
| 679 | static void free_link(AVFilterLink *link) |
| 680 | { |
| 681 | if (!link) |
| 682 | return; |
| 683 | |
| 684 | if (link->src) |
| 685 | link->src->outputs[link->srcpad - link->src->output_pads] = NULL; |
| 686 | if (link->dst) |
| 687 | link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL; |
| 688 | |
| 689 | ff_formats_unref(&link->in_formats); |
| 690 | ff_formats_unref(&link->out_formats); |
| 691 | ff_formats_unref(&link->in_samplerates); |
| 692 | ff_formats_unref(&link->out_samplerates); |
| 693 | ff_channel_layouts_unref(&link->in_channel_layouts); |
| 694 | ff_channel_layouts_unref(&link->out_channel_layouts); |
| 695 | avfilter_link_free(&link); |
| 696 | } |
| 697 | |
| 698 | void avfilter_free(AVFilterContext *filter) |
| 699 | { |
| 700 | int i; |
| 701 | |
| 702 | if (!filter) |
| 703 | return; |
| 704 | |
| 705 | if (filter->graph) |
| 706 | ff_filter_graph_remove_filter(filter->graph, filter); |
| 707 | |
| 708 | if (filter->filter->uninit) |
| 709 | filter->filter->uninit(filter); |
| 710 | |
| 711 | for (i = 0; i < filter->nb_inputs; i++) { |
| 712 | free_link(filter->inputs[i]); |
| 713 | } |
| 714 | for (i = 0; i < filter->nb_outputs; i++) { |
| 715 | free_link(filter->outputs[i]); |
| 716 | } |
| 717 | |
| 718 | if (filter->filter->priv_class) |
| 719 | av_opt_free(filter->priv); |
| 720 | |
| 721 | av_freep(&filter->name); |
| 722 | av_freep(&filter->input_pads); |
| 723 | av_freep(&filter->output_pads); |
| 724 | av_freep(&filter->inputs); |
| 725 | av_freep(&filter->outputs); |
| 726 | av_freep(&filter->priv); |
| 727 | while(filter->command_queue){ |
| 728 | ff_command_queue_pop(filter); |
| 729 | } |
| 730 | av_opt_free(filter); |
| 731 | av_expr_free(filter->enable); |
| 732 | filter->enable = NULL; |
| 733 | av_freep(&filter->var_values); |
| 734 | av_freep(&filter->internal); |
| 735 | av_free(filter); |
| 736 | } |
| 737 | |
| 738 | static int process_options(AVFilterContext *ctx, AVDictionary **options, |
| 739 | const char *args) |
| 740 | { |
| 741 | const AVOption *o = NULL; |
| 742 | int ret, count = 0; |
| 743 | char *av_uninit(parsed_key), *av_uninit(value); |
| 744 | const char *key; |
| 745 | int offset= -1; |
| 746 | |
| 747 | if (!args) |
| 748 | return 0; |
| 749 | |
| 750 | while (*args) { |
| 751 | const char *shorthand = NULL; |
| 752 | |
| 753 | o = av_opt_next(ctx->priv, o); |
| 754 | if (o) { |
| 755 | if (o->type == AV_OPT_TYPE_CONST || o->offset == offset) |
| 756 | continue; |
| 757 | offset = o->offset; |
| 758 | shorthand = o->name; |
| 759 | } |
| 760 | |
| 761 | ret = av_opt_get_key_value(&args, "=", ":", |
| 762 | shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0, |
| 763 | &parsed_key, &value); |
| 764 | if (ret < 0) { |
| 765 | if (ret == AVERROR(EINVAL)) |
| 766 | av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args); |
| 767 | else |
| 768 | av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args, |
| 769 | av_err2str(ret)); |
| 770 | return ret; |
| 771 | } |
| 772 | if (*args) |
| 773 | args++; |
| 774 | if (parsed_key) { |
| 775 | key = parsed_key; |
| 776 | while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */ |
| 777 | } else { |
| 778 | key = shorthand; |
| 779 | } |
| 780 | |
| 781 | av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value); |
| 782 | |
| 783 | if (av_opt_find(ctx, key, NULL, 0, 0)) { |
| 784 | ret = av_opt_set(ctx, key, value, 0); |
| 785 | if (ret < 0) { |
| 786 | av_free(value); |
| 787 | av_free(parsed_key); |
| 788 | return ret; |
| 789 | } |
| 790 | } else { |
| 791 | av_dict_set(options, key, value, 0); |
| 792 | if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) { |
| 793 | if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) { |
| 794 | if (ret == AVERROR_OPTION_NOT_FOUND) |
| 795 | av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key); |
| 796 | av_free(value); |
| 797 | av_free(parsed_key); |
| 798 | return ret; |
| 799 | } |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | av_free(value); |
| 804 | av_free(parsed_key); |
| 805 | count++; |
| 806 | } |
| 807 | |
| 808 | if (ctx->enable_str) { |
| 809 | ret = set_enable_expr(ctx, ctx->enable_str); |
| 810 | if (ret < 0) |
| 811 | return ret; |
| 812 | } |
| 813 | return count; |
| 814 | } |
| 815 | |
| 816 | #if FF_API_AVFILTER_INIT_FILTER |
| 817 | int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque) |
| 818 | { |
| 819 | return avfilter_init_str(filter, args); |
| 820 | } |
| 821 | #endif |
| 822 | |
| 823 | int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options) |
| 824 | { |
| 825 | int ret = 0; |
| 826 | |
| 827 | ret = av_opt_set_dict(ctx, options); |
| 828 | if (ret < 0) { |
| 829 | av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n"); |
| 830 | return ret; |
| 831 | } |
| 832 | |
| 833 | if (ctx->filter->flags & AVFILTER_FLAG_SLICE_THREADS && |
| 834 | ctx->thread_type & ctx->graph->thread_type & AVFILTER_THREAD_SLICE && |
| 835 | ctx->graph->internal->thread_execute) { |
| 836 | ctx->thread_type = AVFILTER_THREAD_SLICE; |
| 837 | ctx->internal->execute = ctx->graph->internal->thread_execute; |
| 838 | } else { |
| 839 | ctx->thread_type = 0; |
| 840 | } |
| 841 | |
| 842 | if (ctx->filter->priv_class) { |
| 843 | ret = av_opt_set_dict(ctx->priv, options); |
| 844 | if (ret < 0) { |
| 845 | av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n"); |
| 846 | return ret; |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | if (ctx->filter->init_opaque) |
| 851 | ret = ctx->filter->init_opaque(ctx, NULL); |
| 852 | else if (ctx->filter->init) |
| 853 | ret = ctx->filter->init(ctx); |
| 854 | else if (ctx->filter->init_dict) |
| 855 | ret = ctx->filter->init_dict(ctx, options); |
| 856 | |
| 857 | return ret; |
| 858 | } |
| 859 | |
| 860 | int avfilter_init_str(AVFilterContext *filter, const char *args) |
| 861 | { |
| 862 | AVDictionary *options = NULL; |
| 863 | AVDictionaryEntry *e; |
| 864 | int ret = 0; |
| 865 | |
| 866 | if (args && *args) { |
| 867 | if (!filter->filter->priv_class) { |
| 868 | av_log(filter, AV_LOG_ERROR, "This filter does not take any " |
| 869 | "options, but options were provided: %s.\n", args); |
| 870 | return AVERROR(EINVAL); |
| 871 | } |
| 872 | |
| 873 | #if FF_API_OLD_FILTER_OPTS |
| 874 | if ( !strcmp(filter->filter->name, "format") || |
| 875 | !strcmp(filter->filter->name, "noformat") || |
| 876 | !strcmp(filter->filter->name, "frei0r") || |
| 877 | !strcmp(filter->filter->name, "frei0r_src") || |
| 878 | !strcmp(filter->filter->name, "ocv") || |
| 879 | !strcmp(filter->filter->name, "pan") || |
| 880 | !strcmp(filter->filter->name, "pp") || |
| 881 | !strcmp(filter->filter->name, "aevalsrc")) { |
| 882 | /* a hack for compatibility with the old syntax |
| 883 | * replace colons with |s */ |
| 884 | char *copy = av_strdup(args); |
| 885 | char *p = copy; |
| 886 | int nb_leading = 0; // number of leading colons to skip |
| 887 | int deprecated = 0; |
| 888 | |
| 889 | if (!copy) { |
| 890 | ret = AVERROR(ENOMEM); |
| 891 | goto fail; |
| 892 | } |
| 893 | |
| 894 | if (!strcmp(filter->filter->name, "frei0r") || |
| 895 | !strcmp(filter->filter->name, "ocv")) |
| 896 | nb_leading = 1; |
| 897 | else if (!strcmp(filter->filter->name, "frei0r_src")) |
| 898 | nb_leading = 3; |
| 899 | |
| 900 | while (nb_leading--) { |
| 901 | p = strchr(p, ':'); |
| 902 | if (!p) { |
| 903 | p = copy + strlen(copy); |
| 904 | break; |
| 905 | } |
| 906 | p++; |
| 907 | } |
| 908 | |
| 909 | deprecated = strchr(p, ':') != NULL; |
| 910 | |
| 911 | if (!strcmp(filter->filter->name, "aevalsrc")) { |
| 912 | deprecated = 0; |
| 913 | while ((p = strchr(p, ':')) && p[1] != ':') { |
| 914 | const char *epos = strchr(p + 1, '='); |
| 915 | const char *spos = strchr(p + 1, ':'); |
| 916 | const int next_token_is_opt = epos && (!spos || epos < spos); |
| 917 | if (next_token_is_opt) { |
| 918 | p++; |
| 919 | break; |
| 920 | } |
| 921 | /* next token does not contain a '=', assume a channel expression */ |
| 922 | deprecated = 1; |
| 923 | *p++ = '|'; |
| 924 | } |
| 925 | if (p && *p == ':') { // double sep '::' found |
| 926 | deprecated = 1; |
| 927 | memmove(p, p + 1, strlen(p)); |
| 928 | } |
| 929 | } else |
| 930 | while ((p = strchr(p, ':'))) |
| 931 | *p++ = '|'; |
| 932 | |
| 933 | if (deprecated) |
| 934 | av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use " |
| 935 | "'|' to separate the list items.\n"); |
| 936 | |
| 937 | av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy); |
| 938 | ret = process_options(filter, &options, copy); |
| 939 | av_freep(©); |
| 940 | |
| 941 | if (ret < 0) |
| 942 | goto fail; |
| 943 | #endif |
| 944 | } else { |
| 945 | #if CONFIG_MP_FILTER |
| 946 | if (!strcmp(filter->filter->name, "mp")) { |
| 947 | char *escaped; |
| 948 | |
| 949 | if (!strncmp(args, "filter=", 7)) |
| 950 | args += 7; |
| 951 | ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0); |
| 952 | if (ret < 0) { |
| 953 | av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args); |
| 954 | goto fail; |
| 955 | } |
| 956 | ret = process_options(filter, &options, escaped); |
| 957 | av_free(escaped); |
| 958 | } else |
| 959 | #endif |
| 960 | ret = process_options(filter, &options, args); |
| 961 | if (ret < 0) |
| 962 | goto fail; |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | ret = avfilter_init_dict(filter, &options); |
| 967 | if (ret < 0) |
| 968 | goto fail; |
| 969 | |
| 970 | if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) { |
| 971 | av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key); |
| 972 | ret = AVERROR_OPTION_NOT_FOUND; |
| 973 | goto fail; |
| 974 | } |
| 975 | |
| 976 | fail: |
| 977 | av_dict_free(&options); |
| 978 | |
| 979 | return ret; |
| 980 | } |
| 981 | |
| 982 | const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx) |
| 983 | { |
| 984 | return pads[pad_idx].name; |
| 985 | } |
| 986 | |
| 987 | enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx) |
| 988 | { |
| 989 | return pads[pad_idx].type; |
| 990 | } |
| 991 | |
| 992 | static int default_filter_frame(AVFilterLink *link, AVFrame *frame) |
| 993 | { |
| 994 | return ff_filter_frame(link->dst->outputs[0], frame); |
| 995 | } |
| 996 | |
| 997 | static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame) |
| 998 | { |
| 999 | int (*filter_frame)(AVFilterLink *, AVFrame *); |
| 1000 | AVFilterContext *dstctx = link->dst; |
| 1001 | AVFilterPad *dst = link->dstpad; |
| 1002 | AVFrame *out = NULL; |
| 1003 | int ret; |
| 1004 | AVFilterCommand *cmd= link->dst->command_queue; |
| 1005 | int64_t pts; |
| 1006 | |
| 1007 | if (link->closed) { |
| 1008 | av_frame_free(&frame); |
| 1009 | return AVERROR_EOF; |
| 1010 | } |
| 1011 | |
| 1012 | if (!(filter_frame = dst->filter_frame)) |
| 1013 | filter_frame = default_filter_frame; |
| 1014 | |
| 1015 | /* copy the frame if needed */ |
| 1016 | if (dst->needs_writable && !av_frame_is_writable(frame)) { |
| 1017 | av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n"); |
| 1018 | |
| 1019 | /* Maybe use ff_copy_buffer_ref instead? */ |
| 1020 | switch (link->type) { |
| 1021 | case AVMEDIA_TYPE_VIDEO: |
| 1022 | out = ff_get_video_buffer(link, link->w, link->h); |
| 1023 | break; |
| 1024 | case AVMEDIA_TYPE_AUDIO: |
| 1025 | out = ff_get_audio_buffer(link, frame->nb_samples); |
| 1026 | break; |
| 1027 | default: |
| 1028 | ret = AVERROR(EINVAL); |
| 1029 | goto fail; |
| 1030 | } |
| 1031 | if (!out) { |
| 1032 | ret = AVERROR(ENOMEM); |
| 1033 | goto fail; |
| 1034 | } |
| 1035 | |
| 1036 | ret = av_frame_copy_props(out, frame); |
| 1037 | if (ret < 0) |
| 1038 | goto fail; |
| 1039 | |
| 1040 | switch (link->type) { |
| 1041 | case AVMEDIA_TYPE_VIDEO: |
| 1042 | av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize, |
| 1043 | frame->format, frame->width, frame->height); |
| 1044 | break; |
| 1045 | case AVMEDIA_TYPE_AUDIO: |
| 1046 | av_samples_copy(out->extended_data, frame->extended_data, |
| 1047 | 0, 0, frame->nb_samples, |
| 1048 | av_get_channel_layout_nb_channels(frame->channel_layout), |
| 1049 | frame->format); |
| 1050 | break; |
| 1051 | default: |
| 1052 | ret = AVERROR(EINVAL); |
| 1053 | goto fail; |
| 1054 | } |
| 1055 | |
| 1056 | av_frame_free(&frame); |
| 1057 | } else |
| 1058 | out = frame; |
| 1059 | |
| 1060 | while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){ |
| 1061 | av_log(link->dst, AV_LOG_DEBUG, |
| 1062 | "Processing command time:%f command:%s arg:%s\n", |
| 1063 | cmd->time, cmd->command, cmd->arg); |
| 1064 | avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags); |
| 1065 | ff_command_queue_pop(link->dst); |
| 1066 | cmd= link->dst->command_queue; |
| 1067 | } |
| 1068 | |
| 1069 | pts = out->pts; |
| 1070 | if (dstctx->enable_str) { |
| 1071 | int64_t pos = av_frame_get_pkt_pos(out); |
| 1072 | dstctx->var_values[VAR_N] = link->frame_count; |
| 1073 | dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base); |
| 1074 | dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos; |
| 1075 | |
| 1076 | dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5; |
| 1077 | if (dstctx->is_disabled && |
| 1078 | (dstctx->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC)) |
| 1079 | filter_frame = default_filter_frame; |
| 1080 | } |
| 1081 | ret = filter_frame(link, out); |
| 1082 | link->frame_count++; |
| 1083 | link->frame_requested = 0; |
| 1084 | ff_update_link_current_pts(link, pts); |
| 1085 | return ret; |
| 1086 | |
| 1087 | fail: |
| 1088 | av_frame_free(&out); |
| 1089 | av_frame_free(&frame); |
| 1090 | return ret; |
| 1091 | } |
| 1092 | |
| 1093 | static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame) |
| 1094 | { |
| 1095 | int insamples = frame->nb_samples, inpos = 0, nb_samples; |
| 1096 | AVFrame *pbuf = link->partial_buf; |
| 1097 | int nb_channels = av_frame_get_channels(frame); |
| 1098 | int ret = 0; |
| 1099 | |
| 1100 | link->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
| 1101 | /* Handle framing (min_samples, max_samples) */ |
| 1102 | while (insamples) { |
| 1103 | if (!pbuf) { |
| 1104 | AVRational samples_tb = { 1, link->sample_rate }; |
| 1105 | pbuf = ff_get_audio_buffer(link, link->partial_buf_size); |
| 1106 | if (!pbuf) { |
| 1107 | av_log(link->dst, AV_LOG_WARNING, |
| 1108 | "Samples dropped due to memory allocation failure.\n"); |
| 1109 | return 0; |
| 1110 | } |
| 1111 | av_frame_copy_props(pbuf, frame); |
| 1112 | pbuf->pts = frame->pts; |
| 1113 | if (pbuf->pts != AV_NOPTS_VALUE) |
| 1114 | pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base); |
| 1115 | pbuf->nb_samples = 0; |
| 1116 | } |
| 1117 | nb_samples = FFMIN(insamples, |
| 1118 | link->partial_buf_size - pbuf->nb_samples); |
| 1119 | av_samples_copy(pbuf->extended_data, frame->extended_data, |
| 1120 | pbuf->nb_samples, inpos, |
| 1121 | nb_samples, nb_channels, link->format); |
| 1122 | inpos += nb_samples; |
| 1123 | insamples -= nb_samples; |
| 1124 | pbuf->nb_samples += nb_samples; |
| 1125 | if (pbuf->nb_samples >= link->min_samples) { |
| 1126 | ret = ff_filter_frame_framed(link, pbuf); |
| 1127 | pbuf = NULL; |
| 1128 | } |
| 1129 | } |
| 1130 | av_frame_free(&frame); |
| 1131 | link->partial_buf = pbuf; |
| 1132 | return ret; |
| 1133 | } |
| 1134 | |
| 1135 | int ff_filter_frame(AVFilterLink *link, AVFrame *frame) |
| 1136 | { |
| 1137 | FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1); |
| 1138 | |
| 1139 | /* Consistency checks */ |
| 1140 | if (link->type == AVMEDIA_TYPE_VIDEO) { |
| 1141 | if (strcmp(link->dst->filter->name, "scale")) { |
| 1142 | av_assert1(frame->format == link->format); |
| 1143 | av_assert1(frame->width == link->w); |
| 1144 | av_assert1(frame->height == link->h); |
| 1145 | } |
| 1146 | } else { |
| 1147 | av_assert1(frame->format == link->format); |
| 1148 | av_assert1(av_frame_get_channels(frame) == link->channels); |
| 1149 | av_assert1(frame->channel_layout == link->channel_layout); |
| 1150 | av_assert1(frame->sample_rate == link->sample_rate); |
| 1151 | } |
| 1152 | |
| 1153 | /* Go directly to actual filtering if possible */ |
| 1154 | if (link->type == AVMEDIA_TYPE_AUDIO && |
| 1155 | link->min_samples && |
| 1156 | (link->partial_buf || |
| 1157 | frame->nb_samples < link->min_samples || |
| 1158 | frame->nb_samples > link->max_samples)) { |
| 1159 | return ff_filter_frame_needs_framing(link, frame); |
| 1160 | } else { |
| 1161 | return ff_filter_frame_framed(link, frame); |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | const AVClass *avfilter_get_class(void) |
| 1166 | { |
| 1167 | return &avfilter_class; |
| 1168 | } |