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/common.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/rational.h"
25 #include "libavutil/audioconvert.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
34 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
36 snprintf(buf, buf_size, "%s%s%s%s%s%s",
37 perms & AV_PERM_READ ? "r" : "",
38 perms & AV_PERM_WRITE ? "w" : "",
39 perms & AV_PERM_PRESERVE ? "p" : "",
40 perms & AV_PERM_REUSE ? "u" : "",
41 perms & AV_PERM_REUSE2 ? "U" : "",
42 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
46 void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
48 av_unused char buf[16];
50 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
51 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
52 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
56 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
57 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
58 ref->video->w, ref->video->h,
59 !ref->video->interlaced ? 'P' : /* Progressive */
60 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
61 ref->video->key_frame,
62 av_get_picture_type_char(ref->video->pict_type));
65 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
66 ref->audio->channel_layout,
67 ref->audio->nb_samples,
68 ref->audio->sample_rate);
71 ff_tlog(ctx, "]%s", end ? "\n" : "");
74 unsigned avfilter_version(void) {
75 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
76 return LIBAVFILTER_VERSION_INT;
79 const char *avfilter_configuration(void)
81 return FFMPEG_CONFIGURATION;
84 const char *avfilter_license(void)
86 #define LICENSE_PREFIX "libavfilter license: "
87 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
90 void ff_command_queue_pop(AVFilterContext *filter)
92 AVFilterCommand *c= filter->command_queue;
94 av_freep(&c->command);
95 filter->command_queue= c->next;
99 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
100 AVFilterPad **pads, AVFilterLink ***links,
105 idx = FFMIN(idx, *count);
107 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
108 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
109 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
110 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
111 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
112 (*links)[idx] = NULL;
115 for (i = idx+1; i < *count; i++)
117 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
120 int avfilter_link(AVFilterContext *src, unsigned srcpad,
121 AVFilterContext *dst, unsigned dstpad)
125 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
126 src->outputs[srcpad] || dst->inputs[dstpad])
129 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
130 av_log(src, AV_LOG_ERROR,
131 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
132 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
133 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
134 return AVERROR(EINVAL);
137 src->outputs[srcpad] =
138 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
142 link->srcpad = &src->output_pads[srcpad];
143 link->dstpad = &dst->input_pads[dstpad];
144 link->type = src->output_pads[srcpad].type;
145 av_assert0(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
151 void avfilter_link_free(AVFilterLink **link)
157 ff_free_pool((*link)->pool);
159 avfilter_unref_bufferp(&(*link)->partial_buf);
164 void avfilter_link_set_closed(AVFilterLink *link, int closed)
166 link->closed = closed;
169 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
170 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
173 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
175 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
176 "between the filter '%s' and the filter '%s'\n",
177 filt->name, link->src->name, link->dst->name);
179 link->dst->inputs[dstpad_idx] = NULL;
180 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
181 /* failed to link output filter to new filter */
182 link->dst->inputs[dstpad_idx] = link;
186 /* re-hookup the link to the new destination filter we inserted */
188 link->dstpad = &filt->input_pads[filt_srcpad_idx];
189 filt->inputs[filt_srcpad_idx] = link;
191 /* if any information on supported media formats already exists on the
192 * link, we need to preserve that */
193 if (link->out_formats)
194 ff_formats_changeref(&link->out_formats,
195 &filt->outputs[filt_dstpad_idx]->out_formats);
197 if (link->out_samplerates)
198 ff_formats_changeref(&link->out_samplerates,
199 &filt->outputs[filt_dstpad_idx]->out_samplerates);
200 if (link->out_channel_layouts)
201 ff_channel_layouts_changeref(&link->out_channel_layouts,
202 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
207 int avfilter_config_links(AVFilterContext *filter)
209 int (*config_link)(AVFilterLink *);
213 for (i = 0; i < filter->nb_inputs; i ++) {
214 AVFilterLink *link = filter->inputs[i];
215 AVFilterLink *inlink = link->src->nb_inputs ?
216 link->src->inputs[0] : NULL;
220 link->current_pts = AV_NOPTS_VALUE;
222 switch (link->init_state) {
225 case AVLINK_STARTINIT:
226 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
229 link->init_state = AVLINK_STARTINIT;
231 if ((ret = avfilter_config_links(link->src)) < 0)
234 if (!(config_link = link->srcpad->config_props)) {
235 if (link->src->nb_inputs != 1) {
236 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
237 "with more than one input "
238 "must set config_props() "
239 "callbacks on all outputs\n");
240 return AVERROR(EINVAL);
242 } else if ((ret = config_link(link)) < 0) {
243 av_log(link->src, AV_LOG_ERROR,
244 "Failed to configure output pad on %s\n",
249 switch (link->type) {
250 case AVMEDIA_TYPE_VIDEO:
251 if (!link->time_base.num && !link->time_base.den)
252 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
254 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
255 link->sample_aspect_ratio = inlink ?
256 inlink->sample_aspect_ratio : (AVRational){1,1};
258 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
259 link->frame_rate = inlink->frame_rate;
266 } else if (!link->w || !link->h) {
267 av_log(link->src, AV_LOG_ERROR,
268 "Video source filters must set their output link's "
269 "width and height\n");
270 return AVERROR(EINVAL);
274 case AVMEDIA_TYPE_AUDIO:
276 if (!link->sample_rate)
277 link->sample_rate = inlink->sample_rate;
278 if (!link->time_base.num && !link->time_base.den)
279 link->time_base = inlink->time_base;
280 if (!link->channel_layout)
281 link->channel_layout = inlink->channel_layout;
282 } else if (!link->sample_rate) {
283 av_log(link->src, AV_LOG_ERROR,
284 "Audio source filters must set their output link's "
286 return AVERROR(EINVAL);
289 if (!link->time_base.num && !link->time_base.den)
290 link->time_base = (AVRational) {1, link->sample_rate};
293 if ((config_link = link->dstpad->config_props))
294 if ((ret = config_link(link)) < 0) {
295 av_log(link->src, AV_LOG_ERROR,
296 "Failed to configure input pad on %s\n",
301 link->init_state = AVLINK_INIT;
308 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
310 if (link->type == AVMEDIA_TYPE_VIDEO) {
312 "link[%p s:%dx%d fmt:%s %s->%s]%s",
313 link, link->w, link->h,
314 av_pix_fmt_descriptors[link->format].name,
315 link->src ? link->src->filter->name : "",
316 link->dst ? link->dst->filter->name : "",
320 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
323 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
324 link, (int)link->sample_rate, buf,
325 av_get_sample_fmt_name(link->format),
326 link->src ? link->src->filter->name : "",
327 link->dst ? link->dst->filter->name : "",
332 int ff_request_frame(AVFilterLink *link)
335 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
339 if (link->srcpad->request_frame)
340 ret = link->srcpad->request_frame(link);
341 else if (link->src->inputs[0])
342 ret = ff_request_frame(link->src->inputs[0]);
343 if (ret == AVERROR_EOF && link->partial_buf) {
344 AVFilterBufferRef *pbuf = link->partial_buf;
345 link->partial_buf = NULL;
346 ff_filter_samples_framed(link, pbuf);
349 if (ret == AVERROR_EOF)
354 int ff_poll_frame(AVFilterLink *link)
356 int i, min = INT_MAX;
358 if (link->srcpad->poll_frame)
359 return link->srcpad->poll_frame(link);
361 for (i = 0; i < link->src->nb_inputs; i++) {
363 if (!link->src->inputs[i])
365 val = ff_poll_frame(link->src->inputs[i]);
366 min = FFMIN(min, val);
372 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
374 if (pts == AV_NOPTS_VALUE)
376 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
377 /* TODO use duration */
378 if (link->graph && link->age_index >= 0)
379 ff_avfilter_graph_update_heap(link->graph, link);
382 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
384 if(!strcmp(cmd, "ping")){
385 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
387 }else if(filter->filter->process_command) {
388 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
390 return AVERROR(ENOSYS);
393 #define MAX_REGISTERED_AVFILTERS_NB 128
395 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
397 static int next_registered_avfilter_idx = 0;
399 AVFilter *avfilter_get_by_name(const char *name)
403 for (i = 0; registered_avfilters[i]; i++)
404 if (!strcmp(registered_avfilters[i]->name, name))
405 return registered_avfilters[i];
410 int avfilter_register(AVFilter *filter)
412 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
413 av_log(NULL, AV_LOG_ERROR,
414 "Maximum number of registered filters %d reached, "
415 "impossible to register filter with name '%s'\n",
416 MAX_REGISTERED_AVFILTERS_NB, filter->name);
417 return AVERROR(ENOMEM);
420 registered_avfilters[next_registered_avfilter_idx++] = filter;
424 AVFilter **av_filter_next(AVFilter **filter)
426 return filter ? ++filter : ®istered_avfilters[0];
429 void avfilter_uninit(void)
431 memset(registered_avfilters, 0, sizeof(registered_avfilters));
432 next_registered_avfilter_idx = 0;
435 static int pad_count(const AVFilterPad *pads)
439 for(count = 0; pads->name; count ++) pads ++;
443 static const char *default_filter_name(void *filter_ctx)
445 AVFilterContext *ctx = filter_ctx;
446 return ctx->name ? ctx->name : ctx->filter->name;
449 static void *filter_child_next(void *obj, void *prev)
451 AVFilterContext *ctx = obj;
452 if (!prev && ctx->filter && ctx->filter->priv_class)
457 static const AVClass *filter_child_class_next(const AVClass *prev)
459 AVFilter **filter_ptr = NULL;
461 /* find the filter that corresponds to prev */
462 while (prev && *(filter_ptr = av_filter_next(filter_ptr)))
463 if ((*filter_ptr)->priv_class == prev)
466 /* could not find filter corresponding to prev */
467 if (prev && !(*filter_ptr))
470 /* find next filter with specific options */
471 while (*(filter_ptr = av_filter_next(filter_ptr)))
472 if ((*filter_ptr)->priv_class)
473 return (*filter_ptr)->priv_class;
477 static const AVClass avfilter_class = {
478 .class_name = "AVFilter",
479 .item_name = default_filter_name,
480 .version = LIBAVUTIL_VERSION_INT,
481 .category = AV_CLASS_CATEGORY_FILTER,
482 .child_next = filter_child_next,
483 .child_class_next = filter_child_class_next,
486 const AVClass *avfilter_get_class(void)
488 return &avfilter_class;
491 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
493 AVFilterContext *ret;
497 return AVERROR(EINVAL);
499 ret = av_mallocz(sizeof(AVFilterContext));
501 return AVERROR(ENOMEM);
503 ret->av_class = &avfilter_class;
504 ret->filter = filter;
505 ret->name = inst_name ? av_strdup(inst_name) : NULL;
506 if (filter->priv_size) {
507 ret->priv = av_mallocz(filter->priv_size);
512 ret->nb_inputs = pad_count(filter->inputs);
513 if (ret->nb_inputs ) {
514 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
515 if (!ret->input_pads)
517 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
518 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
523 ret->nb_outputs = pad_count(filter->outputs);
524 if (ret->nb_outputs) {
525 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
526 if (!ret->output_pads)
528 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
529 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
534 ret->output_count = ret->nb_outputs;
535 ret->input_count = ret->nb_inputs;
542 av_freep(&ret->inputs);
543 av_freep(&ret->input_pads);
545 av_freep(&ret->outputs);
546 av_freep(&ret->output_pads);
548 av_freep(&ret->priv);
550 return AVERROR(ENOMEM);
553 void avfilter_free(AVFilterContext *filter)
561 if (filter->filter->uninit)
562 filter->filter->uninit(filter);
564 for (i = 0; i < filter->nb_inputs; i++) {
565 if ((link = filter->inputs[i])) {
567 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
568 ff_formats_unref(&link->in_formats);
569 ff_formats_unref(&link->out_formats);
570 ff_formats_unref(&link->in_samplerates);
571 ff_formats_unref(&link->out_samplerates);
572 ff_channel_layouts_unref(&link->in_channel_layouts);
573 ff_channel_layouts_unref(&link->out_channel_layouts);
575 avfilter_link_free(&link);
577 for (i = 0; i < filter->nb_outputs; i++) {
578 if ((link = filter->outputs[i])) {
580 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
581 ff_formats_unref(&link->in_formats);
582 ff_formats_unref(&link->out_formats);
583 ff_formats_unref(&link->in_samplerates);
584 ff_formats_unref(&link->out_samplerates);
585 ff_channel_layouts_unref(&link->in_channel_layouts);
586 ff_channel_layouts_unref(&link->out_channel_layouts);
588 avfilter_link_free(&link);
591 av_freep(&filter->name);
592 av_freep(&filter->input_pads);
593 av_freep(&filter->output_pads);
594 av_freep(&filter->inputs);
595 av_freep(&filter->outputs);
596 av_freep(&filter->priv);
597 while(filter->command_queue){
598 ff_command_queue_pop(filter);
603 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
607 if (filter->filter->init_opaque)
608 ret = filter->filter->init_opaque(filter, args, opaque);
609 else if (filter->filter->init)
610 ret = filter->filter->init(filter, args);
614 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
616 return pads[pad_idx].name;
619 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
621 return pads[pad_idx].type;