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/imgutils.h"
28 #include "libavutil/avassert.h"
32 unsigned avfilter_version(void) {
33 return LIBAVFILTER_VERSION_INT;
36 const char *avfilter_configuration(void)
38 return FFMPEG_CONFIGURATION;
41 const char *avfilter_license(void)
43 #define LICENSE_PREFIX "libavfilter license: "
44 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
47 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
49 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
53 if (ref->type == AVMEDIA_TYPE_VIDEO) {
54 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
59 *ret->video = *ref->video;
60 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
61 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
66 *ret->audio = *ref->audio;
69 ret->buf->refcount ++;
73 static void store_in_pool(AVFilterBufferRef *ref)
76 AVFilterPool *pool= ref->buf->priv;
78 av_assert0(ref->buf->data[0]);
80 if(pool->count == POOL_SIZE){
81 AVFilterBufferRef *ref1= pool->pic[0];
82 av_freep(&ref1->video);
83 av_freep(&ref1->audio);
84 av_freep(&ref1->buf->data[0]);
87 memmove(&pool->pic[0], &pool->pic[1], sizeof(void*)*(POOL_SIZE-1));
89 pool->pic[POOL_SIZE-1] = NULL;
92 for(i=0; i<POOL_SIZE; i++){
101 void avfilter_unref_buffer(AVFilterBufferRef *ref)
105 if (!(--ref->buf->refcount)){
110 ref->buf->free(ref->buf);
112 av_freep(&ref->video);
113 av_freep(&ref->audio);
117 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
118 AVFilterPad **pads, AVFilterLink ***links,
123 idx = FFMIN(idx, *count);
125 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
126 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
127 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
128 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
129 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
130 (*links)[idx] = NULL;
133 for (i = idx+1; i < *count; i++)
135 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
138 int avfilter_link(AVFilterContext *src, unsigned srcpad,
139 AVFilterContext *dst, unsigned dstpad)
143 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
144 src->outputs[srcpad] || dst->inputs[dstpad])
147 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
148 av_log(src, AV_LOG_ERROR,
149 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
150 src->name, srcpad, dst->name, dstpad);
151 return AVERROR(EINVAL);
154 src->outputs[srcpad] =
155 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
159 link->srcpad = &src->output_pads[srcpad];
160 link->dstpad = &dst->input_pads[dstpad];
161 link->type = src->output_pads[srcpad].type;
162 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
168 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
169 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
172 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
174 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
175 "between the filter '%s' and the filter '%s'\n",
176 filt->name, link->src->name, link->dst->name);
178 link->dst->inputs[dstpad_idx] = NULL;
179 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
180 /* failed to link output filter to new filter */
181 link->dst->inputs[dstpad_idx] = link;
185 /* re-hookup the link to the new destination filter we inserted */
187 link->dstpad = &filt->input_pads[filt_srcpad_idx];
188 filt->inputs[filt_srcpad_idx] = link;
190 /* if any information on supported media formats already exists on the
191 * link, we need to preserve that */
192 if (link->out_formats)
193 avfilter_formats_changeref(&link->out_formats,
194 &filt->outputs[filt_dstpad_idx]->out_formats);
199 int avfilter_config_links(AVFilterContext *filter)
201 int (*config_link)(AVFilterLink *);
205 for (i = 0; i < filter->input_count; i ++) {
206 AVFilterLink *link = filter->inputs[i];
210 switch (link->init_state) {
213 case AVLINK_STARTINIT:
214 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
217 link->init_state = AVLINK_STARTINIT;
219 if ((ret = avfilter_config_links(link->src)) < 0)
222 if (!(config_link = link->srcpad->config_props))
223 config_link = avfilter_default_config_output_link;
224 if ((ret = config_link(link)) < 0)
227 if (link->time_base.num == 0 && link->time_base.den == 0)
228 link->time_base = link->src && link->src->input_count ?
229 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
231 if (link->sample_aspect_ratio.num == 0 && link->sample_aspect_ratio.den == 0)
232 link->sample_aspect_ratio = link->src->input_count ?
233 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
235 if (link->sample_rate == 0 && link->src && link->src->input_count)
236 link->sample_rate = link->src->inputs[0]->sample_rate;
238 if (link->channel_layout == 0 && link->src && link->src->input_count)
239 link->channel_layout = link->src->inputs[0]->channel_layout;
241 if ((config_link = link->dstpad->config_props))
242 if ((ret = config_link(link)) < 0)
245 link->init_state = AVLINK_INIT;
252 static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
254 snprintf(buf, buf_size, "%s%s%s%s%s%s",
255 perms & AV_PERM_READ ? "r" : "",
256 perms & AV_PERM_WRITE ? "w" : "",
257 perms & AV_PERM_PRESERVE ? "p" : "",
258 perms & AV_PERM_REUSE ? "u" : "",
259 perms & AV_PERM_REUSE2 ? "U" : "",
260 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
264 static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
266 av_unused char buf[16];
268 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
269 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
270 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
274 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
275 ref->video->sample_aspect_ratio.num, ref->video->sample_aspect_ratio.den,
276 ref->video->w, ref->video->h,
277 !ref->video->interlaced ? 'P' : /* Progressive */
278 ref->video->top_field_first ? 'T' : 'B', /* Top / Bottom */
279 ref->video->key_frame,
280 av_get_picture_type_char(ref->video->pict_type));
283 av_dlog(ctx, " cl:%"PRId64"d sn:%d s:%d sr:%d p:%d",
284 ref->audio->channel_layout,
285 ref->audio->nb_samples,
287 ref->audio->sample_rate,
291 av_dlog(ctx, "]%s", end ? "\n" : "");
294 static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
296 if (link->type == AVMEDIA_TYPE_VIDEO) {
298 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
299 link, link->w, link->h,
300 av_pix_fmt_descriptors[link->format].name,
301 link->src ? link->src->filter->name : "",
302 link->dst ? link->dst->filter->name : "",
306 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
309 "link[%p r:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",
310 link, link->sample_rate, buf,
311 av_get_sample_fmt_name(link->format),
312 link->src ? link->src->filter->name : "",
313 link->dst ? link->dst->filter->name : "",
318 #define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
320 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
322 AVFilterBufferRef *ret = NULL;
324 av_unused char buf[16];
325 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
326 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
328 if (link->dstpad->get_video_buffer)
329 ret = link->dstpad->get_video_buffer(link, perms, w, h);
332 ret = avfilter_default_get_video_buffer(link, perms, w, h);
335 ret->type = AVMEDIA_TYPE_VIDEO;
337 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
343 avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
344 int w, int h, enum PixelFormat format)
346 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
347 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
353 picref->buf->free = ff_avfilter_default_free_buffer;
354 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
357 pic->w = picref->video->w = w;
358 pic->h = picref->video->h = h;
360 /* make sure the buffer gets read permission or it's useless for output */
361 picref->perms = perms | AV_PERM_READ;
364 picref->type = AVMEDIA_TYPE_VIDEO;
365 pic->format = picref->format = format;
367 memcpy(pic->data, data, sizeof(pic->data));
368 memcpy(pic->linesize, linesize, sizeof(pic->linesize));
369 memcpy(picref->data, pic->data, sizeof(picref->data));
370 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
375 if (picref && picref->video)
376 av_free(picref->video);
382 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
383 enum AVSampleFormat sample_fmt, int size,
384 int64_t channel_layout, int planar)
386 AVFilterBufferRef *ret = NULL;
388 if (link->dstpad->get_audio_buffer)
389 ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
392 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
395 ret->type = AVMEDIA_TYPE_AUDIO;
400 int avfilter_request_frame(AVFilterLink *link)
402 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
404 if (link->srcpad->request_frame)
405 return link->srcpad->request_frame(link);
406 else if (link->src->inputs[0])
407 return avfilter_request_frame(link->src->inputs[0]);
411 int avfilter_poll_frame(AVFilterLink *link)
413 int i, min = INT_MAX;
415 if (link->srcpad->poll_frame)
416 return link->srcpad->poll_frame(link);
418 for (i = 0; i < link->src->input_count; i++) {
420 if (!link->src->inputs[i])
422 val = avfilter_poll_frame(link->src->inputs[i]);
423 min = FFMIN(min, val);
429 /* XXX: should we do the duplicating of the picture ref here, instead of
430 * forcing the source filter to do it? */
431 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
433 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
434 AVFilterPad *dst = link->dstpad;
435 int perms = picref->perms;
437 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
439 if (!(start_frame = dst->start_frame))
440 start_frame = avfilter_default_start_frame;
442 if (picref->linesize[0] < 0)
443 perms |= AV_PERM_NEG_LINESIZES;
444 /* prepare to copy the picture if it has insufficient permissions */
445 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
446 av_log(link->dst, AV_LOG_DEBUG,
447 "frame copy needed (have perms %x, need %x, reject %x)\n",
449 link->dstpad->min_perms, link->dstpad->rej_perms);
451 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
452 link->src_buf = picref;
453 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
456 link->cur_buf = picref;
458 start_frame(link, link->cur_buf);
461 void avfilter_end_frame(AVFilterLink *link)
463 void (*end_frame)(AVFilterLink *);
465 if (!(end_frame = link->dstpad->end_frame))
466 end_frame = avfilter_default_end_frame;
470 /* unreference the source picture if we're feeding the destination filter
471 * a copied version dues to permission issues */
473 avfilter_unref_buffer(link->src_buf);
474 link->src_buf = NULL;
478 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
480 uint8_t *src[4], *dst[4];
482 void (*draw_slice)(AVFilterLink *, int, int, int);
484 FF_DPRINTF_START(NULL, draw_slice); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
486 /* copy the slice if needed for permission reasons */
488 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
490 for (i = 0; i < 4; i++) {
491 if (link->src_buf->data[i]) {
492 src[i] = link->src_buf-> data[i] +
493 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
494 dst[i] = link->cur_buf->data[i] +
495 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
497 src[i] = dst[i] = NULL;
500 for (i = 0; i < 4; i++) {
502 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
504 if (!src[i]) continue;
506 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
507 memcpy(dst[i], src[i], planew);
508 src[i] += link->src_buf->linesize[i];
509 dst[i] += link->cur_buf->linesize[i];
514 if (!(draw_slice = link->dstpad->draw_slice))
515 draw_slice = avfilter_default_draw_slice;
516 draw_slice(link, y, h, slice_dir);
519 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
521 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
522 AVFilterPad *dst = link->dstpad;
524 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
526 if (!(filter_samples = dst->filter_samples))
527 filter_samples = avfilter_default_filter_samples;
529 /* prepare to copy the samples if the buffer has insufficient permissions */
530 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
531 dst->rej_perms & samplesref->perms) {
533 av_log(link->dst, AV_LOG_DEBUG,
534 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
535 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
537 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
539 samplesref->audio->size,
540 samplesref->audio->channel_layout,
541 samplesref->audio->planar);
542 link->cur_buf->pts = samplesref->pts;
543 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
545 /* Copy actual data into new samples buffer */
546 memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
548 avfilter_unref_buffer(samplesref);
550 link->cur_buf = samplesref;
552 filter_samples(link, link->cur_buf);
555 #define MAX_REGISTERED_AVFILTERS_NB 64
557 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
559 static int next_registered_avfilter_idx = 0;
561 AVFilter *avfilter_get_by_name(const char *name)
565 for (i = 0; registered_avfilters[i]; i++)
566 if (!strcmp(registered_avfilters[i]->name, name))
567 return registered_avfilters[i];
572 int avfilter_register(AVFilter *filter)
574 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
577 registered_avfilters[next_registered_avfilter_idx++] = filter;
581 AVFilter **av_filter_next(AVFilter **filter)
583 return filter ? ++filter : ®istered_avfilters[0];
586 void avfilter_uninit(void)
588 memset(registered_avfilters, 0, sizeof(registered_avfilters));
589 next_registered_avfilter_idx = 0;
592 static int pad_count(const AVFilterPad *pads)
596 for(count = 0; pads->name; count ++) pads ++;
600 static const char *filter_name(void *p)
602 AVFilterContext *filter = p;
603 return filter->filter->name;
606 static const AVClass avfilter_class = {
610 LIBAVUTIL_VERSION_INT,
613 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
615 AVFilterContext *ret;
619 return AVERROR(EINVAL);
621 ret = av_mallocz(sizeof(AVFilterContext));
623 return AVERROR(ENOMEM);
625 ret->av_class = &avfilter_class;
626 ret->filter = filter;
627 ret->name = inst_name ? av_strdup(inst_name) : NULL;
628 if (filter->priv_size) {
629 ret->priv = av_mallocz(filter->priv_size);
634 ret->input_count = pad_count(filter->inputs);
635 if (ret->input_count) {
636 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
637 if (!ret->input_pads)
639 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
640 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
645 ret->output_count = pad_count(filter->outputs);
646 if (ret->output_count) {
647 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
648 if (!ret->output_pads)
650 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
651 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
660 av_freep(&ret->inputs);
661 av_freep(&ret->input_pads);
662 ret->input_count = 0;
663 av_freep(&ret->outputs);
664 av_freep(&ret->output_pads);
665 ret->output_count = 0;
666 av_freep(&ret->priv);
668 return AVERROR(ENOMEM);
671 void avfilter_free(AVFilterContext *filter)
676 if (filter->filter->uninit)
677 filter->filter->uninit(filter);
679 for (i = 0; i < filter->input_count; i++) {
680 if ((link = filter->inputs[i])) {
682 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
683 avfilter_formats_unref(&link->in_formats);
684 avfilter_formats_unref(&link->out_formats);
688 for (i = 0; i < filter->output_count; i++) {
689 if ((link = filter->outputs[i])) {
691 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
692 avfilter_formats_unref(&link->in_formats);
693 avfilter_formats_unref(&link->out_formats);
698 av_freep(&filter->name);
699 av_freep(&filter->input_pads);
700 av_freep(&filter->output_pads);
701 av_freep(&filter->inputs);
702 av_freep(&filter->outputs);
703 av_freep(&filter->priv);
707 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
711 if (filter->filter->init)
712 ret = filter->filter->init(filter, args, opaque);