3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/avassert.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/channel_layout.h"
25 #include "libavutil/common.h"
26 #include "libavutil/imgutils.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/rational.h"
29 #include "libavutil/samplefmt.h"
37 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
39 snprintf(buf, buf_size, "%s%s%s%s%s%s",
40 perms & AV_PERM_READ ? "r" : "",
41 perms & AV_PERM_WRITE ? "w" : "",
42 perms & AV_PERM_PRESERVE ? "p" : "",
43 perms & AV_PERM_REUSE ? "u" : "",
44 perms & AV_PERM_REUSE2 ? "U" : "",
45 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
49 void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
51 av_unused char buf[16];
53 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
54 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
55 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
59 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
60 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
61 ref->video->w, ref->video->h,
62 !ref->video->interlaced ? 'P' : /* Progressive */
63 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
64 ref->video->key_frame,
65 av_get_picture_type_char(ref->video->pict_type));
68 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
69 ref->audio->channel_layout,
70 ref->audio->nb_samples,
71 ref->audio->sample_rate);
74 ff_tlog(ctx, "]%s", end ? "\n" : "");
77 unsigned avfilter_version(void) {
78 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
79 return LIBAVFILTER_VERSION_INT;
82 const char *avfilter_configuration(void)
84 return FFMPEG_CONFIGURATION;
87 const char *avfilter_license(void)
89 #define LICENSE_PREFIX "libavfilter license: "
90 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
93 void ff_command_queue_pop(AVFilterContext *filter)
95 AVFilterCommand *c= filter->command_queue;
97 av_freep(&c->command);
98 filter->command_queue= c->next;
102 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
103 AVFilterPad **pads, AVFilterLink ***links,
108 idx = FFMIN(idx, *count);
110 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
111 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
112 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
113 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
114 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
115 (*links)[idx] = NULL;
118 for (i = idx+1; i < *count; i++)
120 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
123 int avfilter_link(AVFilterContext *src, unsigned srcpad,
124 AVFilterContext *dst, unsigned dstpad)
128 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
129 src->outputs[srcpad] || dst->inputs[dstpad])
132 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
133 av_log(src, AV_LOG_ERROR,
134 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
135 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
136 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
137 return AVERROR(EINVAL);
140 src->outputs[srcpad] =
141 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
145 link->srcpad = &src->output_pads[srcpad];
146 link->dstpad = &dst->input_pads[dstpad];
147 link->type = src->output_pads[srcpad].type;
148 av_assert0(AV_PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
154 void avfilter_link_free(AVFilterLink **link)
160 ff_free_pool((*link)->pool);
162 avfilter_unref_bufferp(&(*link)->partial_buf);
167 int avfilter_link_get_channels(AVFilterLink *link)
169 return link->channels;
172 void avfilter_link_set_closed(AVFilterLink *link, int closed)
174 link->closed = closed;
177 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
178 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
181 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
183 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
184 "between the filter '%s' and the filter '%s'\n",
185 filt->name, link->src->name, link->dst->name);
187 link->dst->inputs[dstpad_idx] = NULL;
188 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
189 /* failed to link output filter to new filter */
190 link->dst->inputs[dstpad_idx] = link;
194 /* re-hookup the link to the new destination filter we inserted */
196 link->dstpad = &filt->input_pads[filt_srcpad_idx];
197 filt->inputs[filt_srcpad_idx] = link;
199 /* if any information on supported media formats already exists on the
200 * link, we need to preserve that */
201 if (link->out_formats)
202 ff_formats_changeref(&link->out_formats,
203 &filt->outputs[filt_dstpad_idx]->out_formats);
205 if (link->out_samplerates)
206 ff_formats_changeref(&link->out_samplerates,
207 &filt->outputs[filt_dstpad_idx]->out_samplerates);
208 if (link->out_channel_layouts)
209 ff_channel_layouts_changeref(&link->out_channel_layouts,
210 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
215 int avfilter_config_links(AVFilterContext *filter)
217 int (*config_link)(AVFilterLink *);
221 for (i = 0; i < filter->nb_inputs; i ++) {
222 AVFilterLink *link = filter->inputs[i];
223 AVFilterLink *inlink = link->src->nb_inputs ?
224 link->src->inputs[0] : NULL;
228 link->current_pts = AV_NOPTS_VALUE;
230 switch (link->init_state) {
233 case AVLINK_STARTINIT:
234 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
237 link->init_state = AVLINK_STARTINIT;
239 if ((ret = avfilter_config_links(link->src)) < 0)
242 if (!(config_link = link->srcpad->config_props)) {
243 if (link->src->nb_inputs != 1) {
244 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
245 "with more than one input "
246 "must set config_props() "
247 "callbacks on all outputs\n");
248 return AVERROR(EINVAL);
250 } else if ((ret = config_link(link)) < 0) {
251 av_log(link->src, AV_LOG_ERROR,
252 "Failed to configure output pad on %s\n",
257 switch (link->type) {
258 case AVMEDIA_TYPE_VIDEO:
259 if (!link->time_base.num && !link->time_base.den)
260 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
262 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
263 link->sample_aspect_ratio = inlink ?
264 inlink->sample_aspect_ratio : (AVRational){1,1};
266 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
267 link->frame_rate = inlink->frame_rate;
274 } else if (!link->w || !link->h) {
275 av_log(link->src, AV_LOG_ERROR,
276 "Video source filters must set their output link's "
277 "width and height\n");
278 return AVERROR(EINVAL);
282 case AVMEDIA_TYPE_AUDIO:
284 if (!link->time_base.num && !link->time_base.den)
285 link->time_base = inlink->time_base;
288 if (!link->time_base.num && !link->time_base.den)
289 link->time_base = (AVRational) {1, link->sample_rate};
292 if ((config_link = link->dstpad->config_props))
293 if ((ret = config_link(link)) < 0) {
294 av_log(link->src, AV_LOG_ERROR,
295 "Failed to configure input pad on %s\n",
300 link->init_state = AVLINK_INIT;
307 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
309 if (link->type == AVMEDIA_TYPE_VIDEO) {
311 "link[%p s:%dx%d fmt:%s %s->%s]%s",
312 link, link->w, link->h,
313 av_get_pix_fmt_name(link->format),
314 link->src ? link->src->filter->name : "",
315 link->dst ? link->dst->filter->name : "",
319 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
322 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
323 link, (int)link->sample_rate, buf,
324 av_get_sample_fmt_name(link->format),
325 link->src ? link->src->filter->name : "",
326 link->dst ? link->dst->filter->name : "",
331 int ff_request_frame(AVFilterLink *link)
334 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
338 if (link->srcpad->request_frame)
339 ret = link->srcpad->request_frame(link);
340 else if (link->src->inputs[0])
341 ret = ff_request_frame(link->src->inputs[0]);
342 if (ret == AVERROR_EOF && link->partial_buf) {
343 AVFilterBufferRef *pbuf = link->partial_buf;
344 link->partial_buf = NULL;
345 ff_filter_samples_framed(link, pbuf);
348 if (ret == AVERROR_EOF)
353 int ff_poll_frame(AVFilterLink *link)
355 int i, min = INT_MAX;
357 if (link->srcpad->poll_frame)
358 return link->srcpad->poll_frame(link);
360 for (i = 0; i < link->src->nb_inputs; i++) {
362 if (!link->src->inputs[i])
364 val = ff_poll_frame(link->src->inputs[i]);
365 min = FFMIN(min, val);
371 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
373 if (pts == AV_NOPTS_VALUE)
375 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
376 /* TODO use duration */
377 if (link->graph && link->age_index >= 0)
378 ff_avfilter_graph_update_heap(link->graph, link);
381 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
383 if(!strcmp(cmd, "ping")){
384 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
386 }else if(filter->filter->process_command) {
387 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
389 return AVERROR(ENOSYS);
392 #define MAX_REGISTERED_AVFILTERS_NB 128
394 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
396 static int next_registered_avfilter_idx = 0;
398 AVFilter *avfilter_get_by_name(const char *name)
402 for (i = 0; registered_avfilters[i]; i++)
403 if (!strcmp(registered_avfilters[i]->name, name))
404 return registered_avfilters[i];
409 int avfilter_register(AVFilter *filter)
413 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
414 av_log(NULL, AV_LOG_ERROR,
415 "Maximum number of registered filters %d reached, "
416 "impossible to register filter with name '%s'\n",
417 MAX_REGISTERED_AVFILTERS_NB, filter->name);
418 return AVERROR(ENOMEM);
421 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
422 const AVFilterPad *input = &filter->inputs[i];
423 av_assert0( !input->filter_frame
424 || (!input->start_frame && !input->end_frame && !input->draw_slice));
427 registered_avfilters[next_registered_avfilter_idx++] = filter;
431 AVFilter **av_filter_next(AVFilter **filter)
433 return filter ? ++filter : ®istered_avfilters[0];
436 void avfilter_uninit(void)
438 memset(registered_avfilters, 0, sizeof(registered_avfilters));
439 next_registered_avfilter_idx = 0;
442 static int pad_count(const AVFilterPad *pads)
449 for(count = 0; pads->name; count ++) pads ++;
453 static const char *default_filter_name(void *filter_ctx)
455 AVFilterContext *ctx = filter_ctx;
456 return ctx->name ? ctx->name : ctx->filter->name;
459 static void *filter_child_next(void *obj, void *prev)
461 AVFilterContext *ctx = obj;
462 if (!prev && ctx->filter && ctx->filter->priv_class)
467 static const AVClass *filter_child_class_next(const AVClass *prev)
469 AVFilter **filter_ptr = NULL;
471 /* find the filter that corresponds to prev */
472 while (prev && *(filter_ptr = av_filter_next(filter_ptr)))
473 if ((*filter_ptr)->priv_class == prev)
476 /* could not find filter corresponding to prev */
477 if (prev && !(*filter_ptr))
480 /* find next filter with specific options */
481 while (*(filter_ptr = av_filter_next(filter_ptr)))
482 if ((*filter_ptr)->priv_class)
483 return (*filter_ptr)->priv_class;
487 static const AVClass avfilter_class = {
488 .class_name = "AVFilter",
489 .item_name = default_filter_name,
490 .version = LIBAVUTIL_VERSION_INT,
491 .category = AV_CLASS_CATEGORY_FILTER,
492 .child_next = filter_child_next,
493 .child_class_next = filter_child_class_next,
496 const AVClass *avfilter_get_class(void)
498 return &avfilter_class;
501 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
503 AVFilterContext *ret;
507 return AVERROR(EINVAL);
509 ret = av_mallocz(sizeof(AVFilterContext));
511 return AVERROR(ENOMEM);
513 ret->av_class = &avfilter_class;
514 ret->filter = filter;
515 ret->name = inst_name ? av_strdup(inst_name) : NULL;
516 if (filter->priv_size) {
517 ret->priv = av_mallocz(filter->priv_size);
522 ret->nb_inputs = pad_count(filter->inputs);
523 if (ret->nb_inputs ) {
524 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
525 if (!ret->input_pads)
527 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
528 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
533 ret->nb_outputs = pad_count(filter->outputs);
534 if (ret->nb_outputs) {
535 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
536 if (!ret->output_pads)
538 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
539 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
544 ret->output_count = ret->nb_outputs;
545 ret->input_count = ret->nb_inputs;
552 av_freep(&ret->inputs);
553 av_freep(&ret->input_pads);
555 av_freep(&ret->outputs);
556 av_freep(&ret->output_pads);
558 av_freep(&ret->priv);
560 return AVERROR(ENOMEM);
563 void avfilter_free(AVFilterContext *filter)
571 if (filter->filter->uninit)
572 filter->filter->uninit(filter);
574 for (i = 0; i < filter->nb_inputs; i++) {
575 if ((link = filter->inputs[i])) {
577 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
578 ff_formats_unref(&link->in_formats);
579 ff_formats_unref(&link->out_formats);
580 ff_formats_unref(&link->in_samplerates);
581 ff_formats_unref(&link->out_samplerates);
582 ff_channel_layouts_unref(&link->in_channel_layouts);
583 ff_channel_layouts_unref(&link->out_channel_layouts);
585 avfilter_link_free(&link);
587 for (i = 0; i < filter->nb_outputs; i++) {
588 if ((link = filter->outputs[i])) {
590 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
591 ff_formats_unref(&link->in_formats);
592 ff_formats_unref(&link->out_formats);
593 ff_formats_unref(&link->in_samplerates);
594 ff_formats_unref(&link->out_samplerates);
595 ff_channel_layouts_unref(&link->in_channel_layouts);
596 ff_channel_layouts_unref(&link->out_channel_layouts);
598 avfilter_link_free(&link);
601 av_freep(&filter->name);
602 av_freep(&filter->input_pads);
603 av_freep(&filter->output_pads);
604 av_freep(&filter->inputs);
605 av_freep(&filter->outputs);
606 av_freep(&filter->priv);
607 while(filter->command_queue){
608 ff_command_queue_pop(filter);
613 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
617 if (filter->filter->init_opaque)
618 ret = filter->filter->init_opaque(filter, args, opaque);
619 else if (filter->filter->init)
620 ret = filter->filter->init(filter, args);
624 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
626 return pads[pad_idx].name;
629 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
631 return pads[pad_idx].type;
634 int ff_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
637 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
639 switch (link->type) {
640 case AVMEDIA_TYPE_VIDEO:
641 if((ret = ff_start_frame(link, frame)) < 0)
643 if((ret = ff_draw_slice(link, 0, frame->video->h, 1)) < 0)
645 if((ret = ff_end_frame(link)) < 0)
648 case AVMEDIA_TYPE_AUDIO:
649 return ff_filter_samples(link, frame);
650 default: return AVERROR(EINVAL);