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"
33 char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
35 snprintf(buf, buf_size, "%s%s%s%s%s%s",
36 perms & AV_PERM_READ ? "r" : "",
37 perms & AV_PERM_WRITE ? "w" : "",
38 perms & AV_PERM_PRESERVE ? "p" : "",
39 perms & AV_PERM_REUSE ? "u" : "",
40 perms & AV_PERM_REUSE2 ? "U" : "",
41 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
45 void ff_tlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
47 av_unused char buf[16];
49 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
50 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
51 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
55 ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
56 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
57 ref->video->w, ref->video->h,
58 !ref->video->interlaced ? 'P' : /* Progressive */
59 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
60 ref->video->key_frame,
61 av_get_picture_type_char(ref->video->pict_type));
64 ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
65 ref->audio->channel_layout,
66 ref->audio->nb_samples,
67 ref->audio->sample_rate);
70 ff_tlog(ctx, "]%s", end ? "\n" : "");
73 unsigned avfilter_version(void) {
74 av_assert0(LIBAVFILTER_VERSION_MICRO >= 100);
75 return LIBAVFILTER_VERSION_INT;
78 const char *avfilter_configuration(void)
80 return FFMPEG_CONFIGURATION;
83 const char *avfilter_license(void)
85 #define LICENSE_PREFIX "libavfilter license: "
86 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
89 void ff_command_queue_pop(AVFilterContext *filter)
91 AVFilterCommand *c= filter->command_queue;
93 av_freep(&c->command);
94 filter->command_queue= c->next;
98 void ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
99 AVFilterPad **pads, AVFilterLink ***links,
104 idx = FFMIN(idx, *count);
106 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
107 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
108 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
109 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
110 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
111 (*links)[idx] = NULL;
114 for (i = idx+1; i < *count; i++)
116 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
119 int avfilter_link(AVFilterContext *src, unsigned srcpad,
120 AVFilterContext *dst, unsigned dstpad)
124 if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
125 src->outputs[srcpad] || dst->inputs[dstpad])
128 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
129 av_log(src, AV_LOG_ERROR,
130 "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
131 src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
132 dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
133 return AVERROR(EINVAL);
136 src->outputs[srcpad] =
137 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
141 link->srcpad = &src->output_pads[srcpad];
142 link->dstpad = &dst->input_pads[dstpad];
143 link->type = src->output_pads[srcpad].type;
144 av_assert0(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
150 void avfilter_link_free(AVFilterLink **link)
156 ff_free_pool((*link)->pool);
161 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
162 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
165 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
167 av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
168 "between the filter '%s' and the filter '%s'\n",
169 filt->name, link->src->name, link->dst->name);
171 link->dst->inputs[dstpad_idx] = NULL;
172 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
173 /* failed to link output filter to new filter */
174 link->dst->inputs[dstpad_idx] = link;
178 /* re-hookup the link to the new destination filter we inserted */
180 link->dstpad = &filt->input_pads[filt_srcpad_idx];
181 filt->inputs[filt_srcpad_idx] = link;
183 /* if any information on supported media formats already exists on the
184 * link, we need to preserve that */
185 if (link->out_formats)
186 ff_formats_changeref(&link->out_formats,
187 &filt->outputs[filt_dstpad_idx]->out_formats);
189 if (link->out_samplerates)
190 ff_formats_changeref(&link->out_samplerates,
191 &filt->outputs[filt_dstpad_idx]->out_samplerates);
192 if (link->out_channel_layouts)
193 ff_channel_layouts_changeref(&link->out_channel_layouts,
194 &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
199 int avfilter_config_links(AVFilterContext *filter)
201 int (*config_link)(AVFilterLink *);
205 for (i = 0; i < filter->nb_inputs; i ++) {
206 AVFilterLink *link = filter->inputs[i];
207 AVFilterLink *inlink = link->src->nb_inputs ?
208 link->src->inputs[0] : NULL;
212 link->current_pts = AV_NOPTS_VALUE;
214 switch (link->init_state) {
217 case AVLINK_STARTINIT:
218 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
221 link->init_state = AVLINK_STARTINIT;
223 if ((ret = avfilter_config_links(link->src)) < 0)
226 if (!(config_link = link->srcpad->config_props)) {
227 if (link->src->nb_inputs != 1) {
228 av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
229 "with more than one input "
230 "must set config_props() "
231 "callbacks on all outputs\n");
232 return AVERROR(EINVAL);
234 } else if ((ret = config_link(link)) < 0) {
235 av_log(link->src, AV_LOG_ERROR,
236 "Failed to configure output pad on %s\n",
241 switch (link->type) {
242 case AVMEDIA_TYPE_VIDEO:
243 if (!link->time_base.num && !link->time_base.den)
244 link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
246 if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
247 link->sample_aspect_ratio = inlink ?
248 inlink->sample_aspect_ratio : (AVRational){1,1};
250 if (inlink && !link->frame_rate.num && !link->frame_rate.den)
251 link->frame_rate = inlink->frame_rate;
258 } else if (!link->w || !link->h) {
259 av_log(link->src, AV_LOG_ERROR,
260 "Video source filters must set their output link's "
261 "width and height\n");
262 return AVERROR(EINVAL);
266 case AVMEDIA_TYPE_AUDIO:
268 if (!link->sample_rate)
269 link->sample_rate = inlink->sample_rate;
270 if (!link->time_base.num && !link->time_base.den)
271 link->time_base = inlink->time_base;
272 } else if (!link->sample_rate) {
273 av_log(link->src, AV_LOG_ERROR,
274 "Audio source filters must set their output link's "
276 return AVERROR(EINVAL);
279 if (!link->time_base.num && !link->time_base.den)
280 link->time_base = (AVRational) {1, link->sample_rate};
283 if ((config_link = link->dstpad->config_props))
284 if ((ret = config_link(link)) < 0) {
285 av_log(link->src, AV_LOG_ERROR,
286 "Failed to configure input pad on %s\n",
291 link->init_state = AVLINK_INIT;
298 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
300 if (link->type == AVMEDIA_TYPE_VIDEO) {
302 "link[%p s:%dx%d fmt:%s %s->%s]%s",
303 link, link->w, link->h,
304 av_pix_fmt_descriptors[link->format].name,
305 link->src ? link->src->filter->name : "",
306 link->dst ? link->dst->filter->name : "",
310 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
313 "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
314 link, (int)link->sample_rate, buf,
315 av_get_sample_fmt_name(link->format),
316 link->src ? link->src->filter->name : "",
317 link->dst ? link->dst->filter->name : "",
322 int ff_request_frame(AVFilterLink *link)
325 FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
327 if (link->srcpad->request_frame)
328 ret = link->srcpad->request_frame(link);
329 else if (link->src->inputs[0])
330 ret = ff_request_frame(link->src->inputs[0]);
331 if (ret == AVERROR_EOF && link->partial_buf) {
332 AVFilterBufferRef *pbuf = link->partial_buf;
333 link->partial_buf = NULL;
334 ff_filter_samples_framed(link, pbuf);
340 int ff_poll_frame(AVFilterLink *link)
342 int i, min = INT_MAX;
344 if (link->srcpad->poll_frame)
345 return link->srcpad->poll_frame(link);
347 for (i = 0; i < link->src->nb_inputs; i++) {
349 if (!link->src->inputs[i])
351 val = ff_poll_frame(link->src->inputs[i]);
352 min = FFMIN(min, val);
358 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
360 if (pts == AV_NOPTS_VALUE)
362 link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
363 /* TODO use duration */
364 if (link->graph && link->age_index >= 0)
365 ff_avfilter_graph_update_heap(link->graph, link);
368 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
370 if(!strcmp(cmd, "ping")){
371 av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
373 }else if(filter->filter->process_command) {
374 return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
376 return AVERROR(ENOSYS);
379 #define MAX_REGISTERED_AVFILTERS_NB 128
381 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
383 static int next_registered_avfilter_idx = 0;
385 AVFilter *avfilter_get_by_name(const char *name)
389 for (i = 0; registered_avfilters[i]; i++)
390 if (!strcmp(registered_avfilters[i]->name, name))
391 return registered_avfilters[i];
396 int avfilter_register(AVFilter *filter)
398 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB) {
399 av_log(NULL, AV_LOG_ERROR,
400 "Maximum number of registered filters %d reached, "
401 "impossible to register filter with name '%s'\n",
402 MAX_REGISTERED_AVFILTERS_NB, filter->name);
403 return AVERROR(ENOMEM);
406 registered_avfilters[next_registered_avfilter_idx++] = filter;
410 AVFilter **av_filter_next(AVFilter **filter)
412 return filter ? ++filter : ®istered_avfilters[0];
415 void avfilter_uninit(void)
417 memset(registered_avfilters, 0, sizeof(registered_avfilters));
418 next_registered_avfilter_idx = 0;
421 static int pad_count(const AVFilterPad *pads)
425 for(count = 0; pads->name; count ++) pads ++;
429 static const char *default_filter_name(void *filter_ctx)
431 AVFilterContext *ctx = filter_ctx;
432 return ctx->name ? ctx->name : ctx->filter->name;
435 static const AVClass avfilter_class = {
436 .class_name = "AVFilter",
437 .item_name = default_filter_name,
438 .version = LIBAVUTIL_VERSION_INT,
439 .category = AV_CLASS_CATEGORY_FILTER,
442 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
444 AVFilterContext *ret;
448 return AVERROR(EINVAL);
450 ret = av_mallocz(sizeof(AVFilterContext));
452 return AVERROR(ENOMEM);
454 ret->av_class = &avfilter_class;
455 ret->filter = filter;
456 ret->name = inst_name ? av_strdup(inst_name) : NULL;
457 if (filter->priv_size) {
458 ret->priv = av_mallocz(filter->priv_size);
463 ret->nb_inputs = pad_count(filter->inputs);
464 if (ret->nb_inputs ) {
465 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
466 if (!ret->input_pads)
468 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
469 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
474 ret->nb_outputs = pad_count(filter->outputs);
475 if (ret->nb_outputs) {
476 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
477 if (!ret->output_pads)
479 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
480 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
485 ret->output_count = ret->nb_outputs;
486 ret->input_count = ret->nb_inputs;
493 av_freep(&ret->inputs);
494 av_freep(&ret->input_pads);
496 av_freep(&ret->outputs);
497 av_freep(&ret->output_pads);
499 av_freep(&ret->priv);
501 return AVERROR(ENOMEM);
504 void avfilter_free(AVFilterContext *filter)
512 if (filter->filter->uninit)
513 filter->filter->uninit(filter);
515 for (i = 0; i < filter->nb_inputs; i++) {
516 if ((link = filter->inputs[i])) {
518 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
519 ff_formats_unref(&link->in_formats);
520 ff_formats_unref(&link->out_formats);
521 ff_formats_unref(&link->in_samplerates);
522 ff_formats_unref(&link->out_samplerates);
523 ff_channel_layouts_unref(&link->in_channel_layouts);
524 ff_channel_layouts_unref(&link->out_channel_layouts);
526 avfilter_link_free(&link);
528 for (i = 0; i < filter->nb_outputs; i++) {
529 if ((link = filter->outputs[i])) {
531 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
532 ff_formats_unref(&link->in_formats);
533 ff_formats_unref(&link->out_formats);
534 ff_formats_unref(&link->in_samplerates);
535 ff_formats_unref(&link->out_samplerates);
536 ff_channel_layouts_unref(&link->in_channel_layouts);
537 ff_channel_layouts_unref(&link->out_channel_layouts);
539 avfilter_link_free(&link);
542 av_freep(&filter->name);
543 av_freep(&filter->input_pads);
544 av_freep(&filter->output_pads);
545 av_freep(&filter->inputs);
546 av_freep(&filter->outputs);
547 av_freep(&filter->priv);
548 while(filter->command_queue){
549 ff_command_queue_pop(filter);
554 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
558 if (filter->filter->init_opaque)
559 ret = filter->filter->init_opaque(filter, args, opaque);
560 else if (filter->filter->init)
561 ret = filter->filter->init(filter, args);
565 const char *avfilter_pad_get_name(AVFilterPad *pads, int pad_idx)
567 return pads[pad_idx].name;
570 enum AVMediaType avfilter_pad_get_type(AVFilterPad *pads, int pad_idx)
572 return pads[pad_idx].type;