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
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/rational.h"
26 #include "libavutil/audioconvert.h"
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
34 unsigned avfilter_version(void) {
35 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
36 return LIBAVFILTER_VERSION_INT;
39 const char *avfilter_configuration(void)
41 return FFMPEG_CONFIGURATION;
44 const char *avfilter_license(void)
46 #define LICENSE_PREFIX "libavfilter license: "
47 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
50 void ff_command_queue_pop(AVFilterContext *filter)
52 AVFilterCommand *c= filter->command_queue;
54 av_freep(&c->command);
55 filter->command_queue= c->next;
59 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
60 AVFilterPad **pads, AVFilterLink ***links,
65 idx = FFMIN(idx, *count);
67 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
68 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
69 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
70 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
71 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
75 for (i = idx+1; i < *count; i++)
77 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
80 int avfilter_link(AVFilterContext *src, unsigned srcpad,
81 AVFilterContext *dst, unsigned dstpad)
85 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
86 src->outputs[srcpad] || dst->inputs[dstpad])
89 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
90 av_log(src, AV_LOG_ERROR,
91 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
92 src->name, srcpad, dst->name, dstpad);
93 return AVERROR(EINVAL);
96 src->outputs[srcpad] =
97 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
101 link->srcpad = &src->output_pads[srcpad];
102 link->dstpad = &dst->input_pads[dstpad];
103 link->type = src->output_pads[srcpad].type;
104 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
110 void avfilter_link_free(AVFilterLink **link)
116 ff_free_pool((*link)->pool);
121 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
122 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
125 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
127 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
128 "between the filter '%s' and the filter '%s'\n",
129 filt->name, link->src->name, link->dst->name);
131 link->dst->inputs[dstpad_idx] = NULL;
132 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
133 /* failed to link output filter to new filter */
134 link->dst->inputs[dstpad_idx] = link;
138 /* re-hookup the link to the new destination filter we inserted */
140 link->dstpad = &filt->input_pads[filt_srcpad_idx];
141 filt->inputs[filt_srcpad_idx] = link;
143 /* if any information on supported media formats already exists on the
144 * link, we need to preserve that */
145 if (link->out_formats)
146 avfilter_formats_changeref(&link->out_formats,
147 &filt->outputs[filt_dstpad_idx]->out_formats);
148 if (link->out_channel_layouts)
149 ff_channel_layouts_changeref(&link->out_channel_layouts,
150 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
151 if (link->out_samplerates)
152 avfilter_formats_changeref(&link->out_samplerates,
153 &filt->outputs[filt_dstpad_idx]->out_samplerates);
158 int avfilter_config_links(AVFilterContext *filter)
160 int (*config_link)(AVFilterLink *);
164 for (i = 0; i < filter->input_count; i ++) {
165 AVFilterLink *link = filter->inputs[i];
166 AVFilterLink *inlink = link->src->input_count ?
167 link->src->inputs[0] : NULL;
171 link->current_pts = AV_NOPTS_VALUE;
173 switch (link->init_state) {
176 case AVLINK_STARTINIT:
177 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
180 link->init_state = AVLINK_STARTINIT;
182 if ((ret = avfilter_config_links(link->src)) < 0)
185 if (!(config_link = link->srcpad->config_props)) {
186 if (link->src->input_count != 1) {
187 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
188 "with more than one input "
189 "must set config_props() "
190 "callbacks on all outputs\n");
191 return AVERROR(EINVAL);
193 } else if ((ret = config_link(link)) < 0)
196 switch (link->type) {
197 case AVMEDIA_TYPE_VIDEO:
198 if (!link->time_base.num && !link->time_base.den)
199 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
201 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
202 link->sample_aspect_ratio = inlink ?
203 inlink->sample_aspect_ratio : (AVRational){1,1};
210 } else if (!link->w || !link->h) {
211 av_log(link->src, AV_LOG_ERROR,
212 "Video source filters must set their output link's "
213 "width and height\n");
214 return AVERROR(EINVAL);
218 case AVMEDIA_TYPE_AUDIO:
220 if (!link->sample_rate)
221 link->sample_rate = inlink->sample_rate;
222 if (!link->time_base.num && !link->time_base.den)
223 link->time_base = inlink->time_base;
224 } else if (!link->sample_rate) {
225 av_log(link->src, AV_LOG_ERROR,
226 "Audio source filters must set their output link's "
228 return AVERROR(EINVAL);
231 if (!link->time_base.num && !link->time_base.den)
232 link->time_base = (AVRational) {1, link->sample_rate};
235 if ((config_link = link->dstpad->config_props))
236 if ((ret = config_link(link)) < 0)
239 link->init_state = AVLINK_INIT;
246 void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
248 if (link->type == AVMEDIA_TYPE_VIDEO) {
250 "link[%p s:%dx%d fmt:%s %s->%s]%s",
251 link, link->w, link->h,
252 av_pix_fmt_descriptors[link->format].name,
253 link->src ? link->src->filter->name : "",
254 link->dst ? link->dst->filter->name : "",
258 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
261 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
262 link, (int)link->sample_rate, buf,
263 av_get_sample_fmt_name(link->format),
264 link->src ? link->src->filter->name : "",
265 link->dst ? link->dst->filter->name : "",
270 int avfilter_request_frame(AVFilterLink *link)
272 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
274 if (link->srcpad->request_frame)
275 return link->srcpad->request_frame(link);
276 else if (link->src->inputs[0])
277 return avfilter_request_frame(link->src->inputs[0]);
281 int avfilter_poll_frame(AVFilterLink *link)
283 int i, min = INT_MAX;
285 if (link->srcpad->poll_frame)
286 return link->srcpad->poll_frame(link);
288 for (i = 0; i < link->src->input_count; i++) {
290 if (!link->src->inputs[i])
292 val = avfilter_poll_frame(link->src->inputs[i]);
293 min = FFMIN(min, val);
299 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
301 if (pts == AV_NOPTS_VALUE)
303 link->current_pts = pts; /* TODO use duration */
304 if (link->graph && link->age_index >= 0)
305 ff_avfilter_graph_update_heap(link->graph, link);
308 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
310 if(!strcmp(cmd, "ping")){
311 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
313 }else if(filter->filter->process_command) {
314 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
316 return AVERROR(ENOSYS);
319 #define MAX_REGISTERED_AVFILTERS_NB 128
321 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
323 static int next_registered_avfilter_idx = 0;
325 AVFilter *avfilter_get_by_name(const char *name)
329 for (i = 0; registered_avfilters[i]; i++)
330 if (!strcmp(registered_avfilters[i]->name, name))
331 return registered_avfilters[i];
336 int avfilter_register(AVFilter *filter)
338 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
339 av_log(NULL, AV_LOG_ERROR,
340 "Maximum number of registered filters %d reached, "
341 "impossible to register filter with name '%s'\n",
342 MAX_REGISTERED_AVFILTERS_NB, filter->name);
343 return AVERROR(ENOMEM);
346 registered_avfilters[next_registered_avfilter_idx++] = filter;
350 AVFilter **av_filter_next(AVFilter **filter)
352 return filter ? ++filter : ®istered_avfilters[0];
355 void avfilter_uninit(void)
357 memset(registered_avfilters, 0, sizeof(registered_avfilters));
358 next_registered_avfilter_idx = 0;
361 static int pad_count(const AVFilterPad *pads)
365 for(count = 0; pads->name; count ++) pads ++;
369 static const char *filter_name(void *p)
371 AVFilterContext *filter = p;
372 return filter->filter->name;
375 static const AVClass avfilter_class = {
376 .class_name = "AVFilter",
377 .item_name = filter_name,
378 .version = LIBAVUTIL_VERSION_INT,
381 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
383 AVFilterContext *ret;
387 return AVERROR(EINVAL);
389 ret = av_mallocz(sizeof(AVFilterContext));
391 return AVERROR(ENOMEM);
393 ret->av_class = &avfilter_class;
394 ret->filter = filter;
395 ret->name = inst_name ? av_strdup(inst_name) : NULL;
396 if (filter->priv_size) {
397 ret->priv = av_mallocz(filter->priv_size);
402 ret->input_count = pad_count(filter->inputs);
403 if (ret->input_count) {
404 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
405 if (!ret->input_pads)
407 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
408 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
413 ret->output_count = pad_count(filter->outputs);
414 if (ret->output_count) {
415 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
416 if (!ret->output_pads)
418 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
419 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
428 av_freep(&ret->inputs);
429 av_freep(&ret->input_pads);
430 ret->input_count = 0;
431 av_freep(&ret->outputs);
432 av_freep(&ret->output_pads);
433 ret->output_count = 0;
434 av_freep(&ret->priv);
436 return AVERROR(ENOMEM);
439 void avfilter_free(AVFilterContext *filter)
447 if (filter->filter->uninit)
448 filter->filter->uninit(filter);
450 for (i = 0; i < filter->input_count; i++) {
451 if ((link = filter->inputs[i])) {
453 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
454 avfilter_formats_unref(&link->in_formats);
455 avfilter_formats_unref(&link->out_formats);
456 avfilter_formats_unref(&link->in_samplerates);
457 avfilter_formats_unref(&link->out_samplerates);
458 ff_channel_layouts_unref(&link->in_channel_layouts);
459 ff_channel_layouts_unref(&link->out_channel_layouts);
461 avfilter_link_free(&link);
463 for (i = 0; i < filter->output_count; i++) {
464 if ((link = filter->outputs[i])) {
466 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
467 avfilter_formats_unref(&link->in_formats);
468 avfilter_formats_unref(&link->out_formats);
469 avfilter_formats_unref(&link->in_samplerates);
470 avfilter_formats_unref(&link->out_samplerates);
471 ff_channel_layouts_unref(&link->in_channel_layouts);
472 ff_channel_layouts_unref(&link->out_channel_layouts);
474 avfilter_link_free(&link);
477 av_freep(&filter->name);
478 av_freep(&filter->input_pads);
479 av_freep(&filter->output_pads);
480 av_freep(&filter->inputs);
481 av_freep(&filter->outputs);
482 av_freep(&filter->priv);
483 while(filter->command_queue){
484 ff_command_queue_pop(filter);
489 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
493 if (filter->filter->init)
494 ret = filter->filter->init(filter, args, opaque);