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/pixdesc.h"
23 #include "libavutil/rational.h"
24 #include "libavutil/audioconvert.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
32 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
34 snprintf(buf, buf_size, "%s%s%s%s%s%s",
35 perms & AV_PERM_READ ? "r" : "",
36 perms & AV_PERM_WRITE ? "w" : "",
37 perms & AV_PERM_PRESERVE ? "p" : "",
38 perms & AV_PERM_REUSE ? "u" : "",
39 perms & AV_PERM_REUSE2 ? "U" : "",
40 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
44 void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
46 av_unused char buf[16];
48 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
49 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
50 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
54 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
55 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
56 ref->video->w, ref->video->h,
57 !ref->video->interlaced ? 'P' : /* Progressive */
58 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
59 ref->video->key_frame,
60 av_get_picture_type_char(ref->video->pict_type));
63 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
64 ref->audio->channel_layout,
65 ref->audio->nb_samples,
66 ref->audio->sample_rate);
69 ff_tlog(ctx, "]%s", end ? "\n" : "");
72 unsigned avfilter_version(void) {
73 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
74 return LIBAVFILTER_VERSION_INT;
77 const char *avfilter_configuration(void)
79 return FFMPEG_CONFIGURATION;
82 const char *avfilter_license(void)
84 #define LICENSE_PREFIX "libavfilter license: "
85 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
88 void ff_command_queue_pop(AVFilterContext *filter)
90 AVFilterCommand *c= filter->command_queue;
92 av_freep(&c->command);
93 filter->command_queue= c->next;
97 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
98 AVFilterPad **pads, AVFilterLink ***links,
103 idx = FFMIN(idx, *count);
105 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
106 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
107 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
108 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
109 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
110 (*links)[idx] = NULL;
113 for (i = idx+1; i < *count; i++)
115 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
118 int avfilter_link(AVFilterContext *src, unsigned srcpad,
119 AVFilterContext *dst, unsigned dstpad)
123 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
124 src->outputs[srcpad] || dst->inputs[dstpad])
127 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
128 av_log(src, AV_LOG_ERROR,
129 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
130 src->name, srcpad, dst->name, dstpad);
131 return AVERROR(EINVAL);
134 src->outputs[srcpad] =
135 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
139 link->srcpad = &src->output_pads[srcpad];
140 link->dstpad = &dst->input_pads[dstpad];
141 link->type = src->output_pads[srcpad].type;
142 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
148 void avfilter_link_free(AVFilterLink **link)
154 ff_free_pool((*link)->pool);
159 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
160 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
163 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
165 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
166 "between the filter '%s' and the filter '%s'\n",
167 filt->name, link->src->name, link->dst->name);
169 link->dst->inputs[dstpad_idx] = NULL;
170 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
171 /* failed to link output filter to new filter */
172 link->dst->inputs[dstpad_idx] = link;
176 /* re-hookup the link to the new destination filter we inserted */
178 link->dstpad = &filt->input_pads[filt_srcpad_idx];
179 filt->inputs[filt_srcpad_idx] = link;
181 /* if any information on supported media formats already exists on the
182 * link, we need to preserve that */
183 if (link->out_formats)
184 ff_formats_changeref(&link->out_formats,
185 &filt->outputs[filt_dstpad_idx]->out_formats);
187 if (link->out_samplerates)
188 ff_formats_changeref(&link->out_samplerates,
189 &filt->outputs[filt_dstpad_idx]->out_samplerates);
190 if (link->out_channel_layouts)
191 ff_channel_layouts_changeref(&link->out_channel_layouts,
192 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
197 int avfilter_config_links(AVFilterContext *filter)
199 int (*config_link)(AVFilterLink *);
203 for (i = 0; i < filter->nb_inputs; i ++) {
204 AVFilterLink *link = filter->inputs[i];
205 AVFilterLink *inlink = link->src->nb_inputs ?
206 link->src->inputs[0] : NULL;
210 link->current_pts = AV_NOPTS_VALUE;
212 switch (link->init_state) {
215 case AVLINK_STARTINIT:
216 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
219 link->init_state = AVLINK_STARTINIT;
221 if ((ret = avfilter_config_links(link->src)) < 0)
224 if (!(config_link = link->srcpad->config_props)) {
225 if (link->src->nb_inputs != 1) {
226 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
227 "with more than one input "
228 "must set config_props() "
229 "callbacks on all outputs\n");
230 return AVERROR(EINVAL);
232 } else if ((ret = config_link(link)) < 0) {
233 av_log(link->src, AV_LOG_ERROR,
234 "Failed to configure output pad on %s\n",
239 switch (link->type) {
240 case AVMEDIA_TYPE_VIDEO:
241 if (!link->time_base.num && !link->time_base.den)
242 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
244 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
245 link->sample_aspect_ratio = inlink ?
246 inlink->sample_aspect_ratio : (AVRational){1,1};
248 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
249 link->frame_rate = inlink->frame_rate;
256 } else if (!link->w || !link->h) {
257 av_log(link->src, AV_LOG_ERROR,
258 "Video source filters must set their output link's "
259 "width and height\n");
260 return AVERROR(EINVAL);
264 case AVMEDIA_TYPE_AUDIO:
266 if (!link->sample_rate)
267 link->sample_rate = inlink->sample_rate;
268 if (!link->time_base.num && !link->time_base.den)
269 link->time_base = inlink->time_base;
270 } else if (!link->sample_rate) {
271 av_log(link->src, AV_LOG_ERROR,
272 "Audio source filters must set their output link's "
274 return AVERROR(EINVAL);
277 if (!link->time_base.num && !link->time_base.den)
278 link->time_base = (AVRational) {1, link->sample_rate};
281 if ((config_link = link->dstpad->config_props))
282 if ((ret = config_link(link)) < 0) {
283 av_log(link->src, AV_LOG_ERROR,
284 "Failed to configure input pad on %s\n",
289 link->init_state = AVLINK_INIT;
296 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
298 if (link->type == AVMEDIA_TYPE_VIDEO) {
300 "link[%p s:%dx%d fmt:%s %s->%s]%s",
301 link, link->w, link->h,
302 av_pix_fmt_descriptors[link->format].name,
303 link->src ? link->src->filter->name : "",
304 link->dst ? link->dst->filter->name : "",
308 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
311 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
312 link, (int)link->sample_rate, buf,
313 av_get_sample_fmt_name(link->format),
314 link->src ? link->src->filter->name : "",
315 link->dst ? link->dst->filter->name : "",
320 int ff_request_frame(AVFilterLink *link)
322 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
324 if (link->srcpad->request_frame)
325 return link->srcpad->request_frame(link);
326 else if (link->src->inputs[0])
327 return ff_request_frame(link->src->inputs[0]);
331 int ff_poll_frame(AVFilterLink *link)
333 int i, min = INT_MAX;
335 if (link->srcpad->poll_frame)
336 return link->srcpad->poll_frame(link);
338 for (i = 0; i < link->src->nb_inputs; i++) {
340 if (!link->src->inputs[i])
342 val = ff_poll_frame(link->src->inputs[i]);
343 min = FFMIN(min, val);
349 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
351 if (pts == AV_NOPTS_VALUE)
353 link->current_pts = pts; /* TODO use duration */
354 if (link->graph && link->age_index >= 0)
355 ff_avfilter_graph_update_heap(link->graph, link);
358 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
360 if(!strcmp(cmd, "ping")){
361 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
363 }else if(filter->filter->process_command) {
364 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
366 return AVERROR(ENOSYS);
369 #define MAX_REGISTERED_AVFILTERS_NB 128
371 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
373 static int next_registered_avfilter_idx = 0;
375 AVFilter *avfilter_get_by_name(const char *name)
379 for (i = 0; registered_avfilters[i]; i++)
380 if (!strcmp(registered_avfilters[i]->name, name))
381 return registered_avfilters[i];
386 int avfilter_register(AVFilter *filter)
388 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
389 av_log(NULL, AV_LOG_ERROR,
390 "Maximum number of registered filters %d reached, "
391 "impossible to register filter with name '%s'\n",
392 MAX_REGISTERED_AVFILTERS_NB, filter->name);
393 return AVERROR(ENOMEM);
396 registered_avfilters[next_registered_avfilter_idx++] = filter;
400 AVFilter **av_filter_next(AVFilter **filter)
402 return filter ? ++filter : ®istered_avfilters[0];
405 void avfilter_uninit(void)
407 memset(registered_avfilters, 0, sizeof(registered_avfilters));
408 next_registered_avfilter_idx = 0;
411 static int pad_count(const AVFilterPad *pads)
415 for(count = 0; pads->name; count ++) pads ++;
419 static const char *default_filter_name(void *filter_ctx)
421 AVFilterContext *ctx = filter_ctx;
422 return ctx->name ? ctx->name : ctx->filter->name;
425 static const AVClass avfilter_class = {
426 .class_name = "AVFilter",
427 .item_name = default_filter_name,
428 .version = LIBAVUTIL_VERSION_INT,
429 .category = AV_CLASS_CATEGORY_FILTER,
432 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
434 AVFilterContext *ret;
438 return AVERROR(EINVAL);
440 ret = av_mallocz(sizeof(AVFilterContext));
442 return AVERROR(ENOMEM);
444 ret->av_class = &avfilter_class;
445 ret->filter = filter;
446 ret->name = inst_name ? av_strdup(inst_name) : NULL;
447 if (filter->priv_size) {
448 ret->priv = av_mallocz(filter->priv_size);
453 ret->nb_inputs = pad_count(filter->inputs);
454 if (ret->nb_inputs ) {
455 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
456 if (!ret->input_pads)
458 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
459 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
464 ret->nb_outputs = pad_count(filter->outputs);
465 if (ret->nb_outputs) {
466 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
467 if (!ret->output_pads)
469 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
470 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
475 ret->output_count = ret->nb_outputs;
476 ret->input_count = ret->nb_inputs;
483 av_freep(&ret->inputs);
484 av_freep(&ret->input_pads);
486 av_freep(&ret->outputs);
487 av_freep(&ret->output_pads);
489 av_freep(&ret->priv);
491 return AVERROR(ENOMEM);
494 void avfilter_free(AVFilterContext *filter)
502 if (filter->filter->uninit)
503 filter->filter->uninit(filter);
505 for (i = 0; i < filter->nb_inputs; i++) {
506 if ((link = filter->inputs[i])) {
508 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
509 ff_formats_unref(&link->in_formats);
510 ff_formats_unref(&link->out_formats);
511 ff_formats_unref(&link->in_samplerates);
512 ff_formats_unref(&link->out_samplerates);
513 ff_channel_layouts_unref(&link->in_channel_layouts);
514 ff_channel_layouts_unref(&link->out_channel_layouts);
516 avfilter_link_free(&link);
518 for (i = 0; i < filter->nb_outputs; i++) {
519 if ((link = filter->outputs[i])) {
521 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
522 ff_formats_unref(&link->in_formats);
523 ff_formats_unref(&link->out_formats);
524 ff_formats_unref(&link->in_samplerates);
525 ff_formats_unref(&link->out_samplerates);
526 ff_channel_layouts_unref(&link->in_channel_layouts);
527 ff_channel_layouts_unref(&link->out_channel_layouts);
529 avfilter_link_free(&link);
532 av_freep(&filter->name);
533 av_freep(&filter->input_pads);
534 av_freep(&filter->output_pads);
535 av_freep(&filter->inputs);
536 av_freep(&filter->outputs);
537 av_freep(&filter->priv);
538 while(filter->command_queue){
539 ff_command_queue_pop(filter);
544 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
548 if (filter->filter->init)
549 ret = filter->filter->init(filter, args, opaque);
553 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
555 return pads[pad_idx].name;
558 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
560 return pads[pad_idx].type;
563 #if FF_API_DEFAULT_CONFIG_OUTPUT_LINK
564 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
565 AVFilterPad **pads, AVFilterLink ***links,
568 ff_insert_pad(idx, count, padidx_off, pads, links, newpad);
570 void avfilter_insert_inpad(AVFilterContext *f, unsigned index,
573 ff_insert_pad(index, &f->nb_inputs, offsetof(AVFilterLink, dstpad),
574 &f->input_pads, &f->inputs, p);
576 f->input_count = f->nb_inputs;
579 void avfilter_insert_outpad(AVFilterContext *f, unsigned index,
582 ff_insert_pad(index, &f->nb_outputs, offsetof(AVFilterLink, srcpad),
583 &f->output_pads, &f->outputs, p);
585 f->output_count = f->nb_outputs;
588 int avfilter_poll_frame(AVFilterLink *link)
590 return ff_poll_frame(link);
592 int avfilter_request_frame(AVFilterLink *link)
594 return ff_request_frame(link);