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2ba45a60 DM |
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 | } |