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 void avfilter_link_set_closed(AVFilterLink *link, int closed)
169 link->closed = closed;
172 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
173 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
176 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
178 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
179 "between the filter '%s' and the filter '%s'\n",
180 filt->name, link->src->name, link->dst->name);
182 link->dst->inputs[dstpad_idx] = NULL;
183 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
184 /* failed to link output filter to new filter */
185 link->dst->inputs[dstpad_idx] = link;
189 /* re-hookup the link to the new destination filter we inserted */
191 link->dstpad = &filt->input_pads[filt_srcpad_idx];
192 filt->inputs[filt_srcpad_idx] = link;
194 /* if any information on supported media formats already exists on the
195 * link, we need to preserve that */
196 if (link->out_formats)
197 ff_formats_changeref(&link->out_formats,
198 &filt->outputs[filt_dstpad_idx]->out_formats);
200 if (link->out_samplerates)
201 ff_formats_changeref(&link->out_samplerates,
202 &filt->outputs[filt_dstpad_idx]->out_samplerates);
203 if (link->out_channel_layouts)
204 ff_channel_layouts_changeref(&link->out_channel_layouts,
205 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
210 int avfilter_config_links(AVFilterContext *filter)
212 int (*config_link)(AVFilterLink *);
216 for (i = 0; i < filter->nb_inputs; i ++) {
217 AVFilterLink *link = filter->inputs[i];
218 AVFilterLink *inlink = link->src->nb_inputs ?
219 link->src->inputs[0] : NULL;
223 link->current_pts = AV_NOPTS_VALUE;
225 switch (link->init_state) {
228 case AVLINK_STARTINIT:
229 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
232 link->init_state = AVLINK_STARTINIT;
234 if ((ret = avfilter_config_links(link->src)) < 0)
237 if (!(config_link = link->srcpad->config_props)) {
238 if (link->src->nb_inputs != 1) {
239 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
240 "with more than one input "
241 "must set config_props() "
242 "callbacks on all outputs\n");
243 return AVERROR(EINVAL);
245 } else if ((ret = config_link(link)) < 0) {
246 av_log(link->src, AV_LOG_ERROR,
247 "Failed to configure output pad on %s\n",
252 switch (link->type) {
253 case AVMEDIA_TYPE_VIDEO:
254 if (!link->time_base.num && !link->time_base.den)
255 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
257 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
258 link->sample_aspect_ratio = inlink ?
259 inlink->sample_aspect_ratio : (AVRational){1,1};
261 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
262 link->frame_rate = inlink->frame_rate;
269 } else if (!link->w || !link->h) {
270 av_log(link->src, AV_LOG_ERROR,
271 "Video source filters must set their output link's "
272 "width and height\n");
273 return AVERROR(EINVAL);
277 case AVMEDIA_TYPE_AUDIO:
279 if (!link->sample_rate)
280 link->sample_rate = inlink->sample_rate;
281 if (!link->time_base.num && !link->time_base.den)
282 link->time_base = inlink->time_base;
283 if (!link->channel_layout)
284 link->channel_layout = inlink->channel_layout;
285 } else if (!link->sample_rate) {
286 av_log(link->src, AV_LOG_ERROR,
287 "Audio source filters must set their output link's "
289 return AVERROR(EINVAL);
292 if (!link->time_base.num && !link->time_base.den)
293 link->time_base = (AVRational) {1, link->sample_rate};
296 if ((config_link = link->dstpad->config_props))
297 if ((ret = config_link(link)) < 0) {
298 av_log(link->src, AV_LOG_ERROR,
299 "Failed to configure input pad on %s\n",
304 link->init_state = AVLINK_INIT;
311 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
313 if (link->type == AVMEDIA_TYPE_VIDEO) {
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 : "",
323 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
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 : "",
335 int ff_request_frame(AVFilterLink *link)
338 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
342 if (link->srcpad->request_frame)
343 ret = link->srcpad->request_frame(link);
344 else if (link->src->inputs[0])
345 ret = ff_request_frame(link->src->inputs[0]);
346 if (ret == AVERROR_EOF && link->partial_buf) {
347 AVFilterBufferRef *pbuf = link->partial_buf;
348 link->partial_buf = NULL;
349 ff_filter_samples_framed(link, pbuf);
352 if (ret == AVERROR_EOF)
357 int ff_poll_frame(AVFilterLink *link)
359 int i, min = INT_MAX;
361 if (link->srcpad->poll_frame)
362 return link->srcpad->poll_frame(link);
364 for (i = 0; i < link->src->nb_inputs; i++) {
366 if (!link->src->inputs[i])
368 val = ff_poll_frame(link->src->inputs[i]);
369 min = FFMIN(min, val);
375 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
377 if (pts == AV_NOPTS_VALUE)
379 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
380 /* TODO use duration */
381 if (link->graph && link->age_index >= 0)
382 ff_avfilter_graph_update_heap(link->graph, link);
385 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
387 if(!strcmp(cmd, "ping")){
388 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
390 }else if(filter->filter->process_command) {
391 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
393 return AVERROR(ENOSYS);
396 #define MAX_REGISTERED_AVFILTERS_NB 128
398 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
400 static int next_registered_avfilter_idx = 0;
402 AVFilter *avfilter_get_by_name(const char *name)
406 for (i = 0; registered_avfilters[i]; i++)
407 if (!strcmp(registered_avfilters[i]->name, name))
408 return registered_avfilters[i];
413 int avfilter_register(AVFilter *filter)
417 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
418 av_log(NULL, AV_LOG_ERROR,
419 "Maximum number of registered filters %d reached, "
420 "impossible to register filter with name '%s'\n",
421 MAX_REGISTERED_AVFILTERS_NB, filter->name);
422 return AVERROR(ENOMEM);
425 for(i=0; filter->inputs && filter->inputs[i].name; i++) {
426 const AVFilterPad *input = &filter->inputs[i];
427 av_assert0( !input->filter_frame
428 || (!input->start_frame && !input->end_frame && !input->draw_slice));
431 registered_avfilters[next_registered_avfilter_idx++] = filter;
435 AVFilter **av_filter_next(AVFilter **filter)
437 return filter ? ++filter : ®istered_avfilters[0];
440 void avfilter_uninit(void)
442 memset(registered_avfilters, 0, sizeof(registered_avfilters));
443 next_registered_avfilter_idx = 0;
446 static int pad_count(const AVFilterPad *pads)
453 for(count = 0; pads->name; count ++) pads ++;
457 static const char *default_filter_name(void *filter_ctx)
459 AVFilterContext *ctx = filter_ctx;
460 return ctx->name ? ctx->name : ctx->filter->name;
463 static void *filter_child_next(void *obj, void *prev)
465 AVFilterContext *ctx = obj;
466 if (!prev && ctx->filter && ctx->filter->priv_class)
471 static const AVClass *filter_child_class_next(const AVClass *prev)
473 AVFilter **filter_ptr = NULL;
475 /* find the filter that corresponds to prev */
476 while (prev && *(filter_ptr = av_filter_next(filter_ptr)))
477 if ((*filter_ptr)->priv_class == prev)
480 /* could not find filter corresponding to prev */
481 if (prev && !(*filter_ptr))
484 /* find next filter with specific options */
485 while (*(filter_ptr = av_filter_next(filter_ptr)))
486 if ((*filter_ptr)->priv_class)
487 return (*filter_ptr)->priv_class;
491 static const AVClass avfilter_class = {
492 .class_name = "AVFilter",
493 .item_name = default_filter_name,
494 .version = LIBAVUTIL_VERSION_INT,
495 .category = AV_CLASS_CATEGORY_FILTER,
496 .child_next = filter_child_next,
497 .child_class_next = filter_child_class_next,
500 const AVClass *avfilter_get_class(void)
502 return &avfilter_class;
505 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
507 AVFilterContext *ret;
511 return AVERROR(EINVAL);
513 ret = av_mallocz(sizeof(AVFilterContext));
515 return AVERROR(ENOMEM);
517 ret->av_class = &avfilter_class;
518 ret->filter = filter;
519 ret->name = inst_name ? av_strdup(inst_name) : NULL;
520 if (filter->priv_size) {
521 ret->priv = av_mallocz(filter->priv_size);
526 ret->nb_inputs = pad_count(filter->inputs);
527 if (ret->nb_inputs ) {
528 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
529 if (!ret->input_pads)
531 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
532 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
537 ret->nb_outputs = pad_count(filter->outputs);
538 if (ret->nb_outputs) {
539 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
540 if (!ret->output_pads)
542 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
543 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
548 ret->output_count = ret->nb_outputs;
549 ret->input_count = ret->nb_inputs;
556 av_freep(&ret->inputs);
557 av_freep(&ret->input_pads);
559 av_freep(&ret->outputs);
560 av_freep(&ret->output_pads);
562 av_freep(&ret->priv);
564 return AVERROR(ENOMEM);
567 void avfilter_free(AVFilterContext *filter)
575 if (filter->filter->uninit)
576 filter->filter->uninit(filter);
578 for (i = 0; i < filter->nb_inputs; i++) {
579 if ((link = filter->inputs[i])) {
581 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
582 ff_formats_unref(&link->in_formats);
583 ff_formats_unref(&link->out_formats);
584 ff_formats_unref(&link->in_samplerates);
585 ff_formats_unref(&link->out_samplerates);
586 ff_channel_layouts_unref(&link->in_channel_layouts);
587 ff_channel_layouts_unref(&link->out_channel_layouts);
589 avfilter_link_free(&link);
591 for (i = 0; i < filter->nb_outputs; i++) {
592 if ((link = filter->outputs[i])) {
594 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
595 ff_formats_unref(&link->in_formats);
596 ff_formats_unref(&link->out_formats);
597 ff_formats_unref(&link->in_samplerates);
598 ff_formats_unref(&link->out_samplerates);
599 ff_channel_layouts_unref(&link->in_channel_layouts);
600 ff_channel_layouts_unref(&link->out_channel_layouts);
602 avfilter_link_free(&link);
605 av_freep(&filter->name);
606 av_freep(&filter->input_pads);
607 av_freep(&filter->output_pads);
608 av_freep(&filter->inputs);
609 av_freep(&filter->outputs);
610 av_freep(&filter->priv);
611 while(filter->command_queue){
612 ff_command_queue_pop(filter);
617 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
621 if (filter->filter->init_opaque)
622 ret = filter->filter->init_opaque(filter, args, opaque);
623 else if (filter->filter->init)
624 ret = filter->filter->init(filter, args);
628 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
630 return pads[pad_idx].name;
633 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
635 return pads[pad_idx].type;
638 int ff_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
641 FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
643 switch (link->type) {
644 case AVMEDIA_TYPE_VIDEO:
645 if((ret = ff_start_frame(link, frame)) < 0)
647 if((ret = ff_draw_slice(link, 0, frame->video->h, 1)) < 0)
649 if((ret = ff_end_frame(link)) < 0)
652 case AVMEDIA_TYPE_AUDIO:
653 return ff_filter_samples(link, frame);
654 default: return AVERROR(EINVAL);