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 "libavcodec/audioconvert.c"
25 #include "libavutil/pixdesc.h"
26 #include "libavcore/imgutils.h"
30 unsigned avfilter_version(void) {
31 return LIBAVFILTER_VERSION_INT;
34 const char *avfilter_configuration(void)
36 return FFMPEG_CONFIGURATION;
39 const char *avfilter_license(void)
41 #define LICENSE_PREFIX "libavfilter license: "
42 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
45 /** helper macros to get the in/out pad on the dst/src filter */
46 #define link_dpad(link) link->dst-> input_pads[link->dstpad]
47 #define link_spad(link) link->src->output_pads[link->srcpad]
49 AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
51 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
55 if (ref->type == AVMEDIA_TYPE_VIDEO) {
56 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
61 *ret->video = *ref->video;
62 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
63 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
68 *ret->audio = *ref->audio;
71 ret->buf->refcount ++;
75 void avfilter_unref_buffer(AVFilterBufferRef *ref)
77 if (!(--ref->buf->refcount))
78 ref->buf->free(ref->buf);
84 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
85 AVFilterPad **pads, AVFilterLink ***links,
90 idx = FFMIN(idx, *count);
92 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
93 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
94 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
95 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
96 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
100 for (i = idx+1; i < *count; i++)
102 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
105 int avfilter_link(AVFilterContext *src, unsigned srcpad,
106 AVFilterContext *dst, unsigned dstpad)
110 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
111 src->outputs[srcpad] || dst->inputs[dstpad])
114 src->outputs[srcpad] =
115 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
119 link->srcpad = srcpad;
120 link->dstpad = dstpad;
121 link->type = src->output_pads[srcpad].type;
122 assert(PIX_FMT_NONE == -1 && SAMPLE_FMT_NONE == -1);
128 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
129 unsigned in, unsigned out)
131 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
132 "between the filter '%s' and the filter '%s'\n",
133 filt->name, link->src->name, link->dst->name);
135 link->dst->inputs[link->dstpad] = NULL;
136 if (avfilter_link(filt, out, link->dst, link->dstpad)) {
137 /* failed to link output filter to new filter */
138 link->dst->inputs[link->dstpad] = link;
142 /* re-hookup the link to the new destination filter we inserted */
145 filt->inputs[in] = link;
147 /* if any information on supported media formats already exists on the
148 * link, we need to preserve that */
149 if (link->out_formats)
150 avfilter_formats_changeref(&link->out_formats,
151 &filt->outputs[out]->out_formats);
156 int avfilter_config_links(AVFilterContext *filter)
158 int (*config_link)(AVFilterLink *);
161 for (i = 0; i < filter->input_count; i ++) {
162 AVFilterLink *link = filter->inputs[i];
166 switch (link->init_state) {
169 case AVLINK_STARTINIT:
170 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
173 link->init_state = AVLINK_STARTINIT;
175 if (avfilter_config_links(link->src))
178 if (!(config_link = link_spad(link).config_props))
179 config_link = avfilter_default_config_output_link;
180 if (config_link(link))
183 if ((config_link = link_dpad(link).config_props))
184 if (config_link(link))
187 link->init_state = AVLINK_INIT;
194 void ff_dprintf_picref(void *ctx, AVFilterBufferRef *picref, int end)
197 "picref[%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
200 picref->linesize[0], picref->linesize[1], picref->linesize[2], picref->linesize[3],
201 picref->pts, picref->pos);
204 dprintf(ctx, " a:%d/%d s:%dx%d i:%c",
205 picref->video->pixel_aspect.num, picref->video->pixel_aspect.den,
206 picref->video->w, picref->video->h,
207 !picref->video->interlaced ? 'P' : /* Progressive */
208 picref->video->top_field_first ? 'T' : 'B'); /* Top / Bottom */
210 dprintf(ctx, "]%s", end ? "\n" : "");
213 void ff_dprintf_link(void *ctx, AVFilterLink *link, int end)
216 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
217 link, link->w, link->h,
218 av_pix_fmt_descriptors[link->format].name,
219 link->src ? link->src->filter->name : "",
220 link->dst ? link->dst->filter->name : "",
224 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
226 AVFilterBufferRef *ret = NULL;
228 FF_DPRINTF_START(NULL, get_video_buffer); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " perms:%d w:%d h:%d\n", perms, w, h);
230 if (link_dpad(link).get_video_buffer)
231 ret = link_dpad(link).get_video_buffer(link, perms, w, h);
234 ret = avfilter_default_get_video_buffer(link, perms, w, h);
237 ret->type = AVMEDIA_TYPE_VIDEO;
239 FF_DPRINTF_START(NULL, get_video_buffer); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " returning "); ff_dprintf_picref(NULL, ret, 1);
244 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
245 enum SampleFormat sample_fmt, int size,
246 int64_t channel_layout, int planar)
248 AVFilterBufferRef *ret = NULL;
250 if (link_dpad(link).get_audio_buffer)
251 ret = link_dpad(link).get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
254 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
257 ret->type = AVMEDIA_TYPE_AUDIO;
262 int avfilter_request_frame(AVFilterLink *link)
264 FF_DPRINTF_START(NULL, request_frame); ff_dprintf_link(NULL, link, 1);
266 if (link_spad(link).request_frame)
267 return link_spad(link).request_frame(link);
268 else if (link->src->inputs[0])
269 return avfilter_request_frame(link->src->inputs[0]);
273 int avfilter_poll_frame(AVFilterLink *link)
275 int i, min = INT_MAX;
277 if (link_spad(link).poll_frame)
278 return link_spad(link).poll_frame(link);
280 for (i = 0; i < link->src->input_count; i++) {
282 if (!link->src->inputs[i])
284 val = avfilter_poll_frame(link->src->inputs[i]);
285 min = FFMIN(min, val);
291 /* XXX: should we do the duplicating of the picture ref here, instead of
292 * forcing the source filter to do it? */
293 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
295 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
296 AVFilterPad *dst = &link_dpad(link);
298 FF_DPRINTF_START(NULL, start_frame); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " "); ff_dprintf_picref(NULL, picref, 1);
300 if (!(start_frame = dst->start_frame))
301 start_frame = avfilter_default_start_frame;
303 /* prepare to copy the picture if it has insufficient permissions */
304 if ((dst->min_perms & picref->perms) != dst->min_perms ||
305 dst->rej_perms & picref->perms) {
306 av_log(link->dst, AV_LOG_DEBUG,
307 "frame copy needed (have perms %x, need %x, reject %x)\n",
309 link_dpad(link).min_perms, link_dpad(link).rej_perms);
311 link->cur_buf = avfilter_default_get_video_buffer(link, dst->min_perms, link->w, link->h);
312 link->src_buf = picref;
313 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
316 link->cur_buf = picref;
318 start_frame(link, link->cur_buf);
321 void avfilter_end_frame(AVFilterLink *link)
323 void (*end_frame)(AVFilterLink *);
325 if (!(end_frame = link_dpad(link).end_frame))
326 end_frame = avfilter_default_end_frame;
330 /* unreference the source picture if we're feeding the destination filter
331 * a copied version dues to permission issues */
333 avfilter_unref_buffer(link->src_buf);
334 link->src_buf = NULL;
338 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
340 uint8_t *src[4], *dst[4];
342 void (*draw_slice)(AVFilterLink *, int, int, int);
344 FF_DPRINTF_START(NULL, draw_slice); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " y:%d h:%d dir:%d\n", y, h, slice_dir);
346 /* copy the slice if needed for permission reasons */
348 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
350 for (i = 0; i < 4; i++) {
351 if (link->src_buf->data[i]) {
352 src[i] = link->src_buf-> data[i] +
353 (y >> (i==0 ? 0 : vsub)) * link->src_buf-> linesize[i];
354 dst[i] = link->cur_buf->data[i] +
355 (y >> (i==0 ? 0 : vsub)) * link->cur_buf->linesize[i];
357 src[i] = dst[i] = NULL;
360 for (i = 0; i < 4; i++) {
362 av_get_image_linesize(link->format, link->cur_buf->video->w, i);
364 if (!src[i]) continue;
366 for (j = 0; j < h >> (i==0 ? 0 : vsub); j++) {
367 memcpy(dst[i], src[i], planew);
368 src[i] += link->src_buf->linesize[i];
369 dst[i] += link->cur_buf->linesize[i];
374 if (!(draw_slice = link_dpad(link).draw_slice))
375 draw_slice = avfilter_default_draw_slice;
376 draw_slice(link, y, h, slice_dir);
379 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
381 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
382 AVFilterPad *dst = &link_dpad(link);
384 if (!(filter_samples = dst->filter_samples))
385 filter_samples = avfilter_default_filter_samples;
387 /* prepare to copy the samples if the buffer has insufficient permissions */
388 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
389 dst->rej_perms & samplesref->perms) {
391 av_log(link->dst, AV_LOG_DEBUG,
392 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
393 samplesref->perms, link_dpad(link).min_perms, link_dpad(link).rej_perms);
395 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
397 samplesref->audio->size,
398 samplesref->audio->channel_layout,
399 samplesref->audio->planar);
400 link->cur_buf->pts = samplesref->pts;
401 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
403 /* Copy actual data into new samples buffer */
404 memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
406 avfilter_unref_buffer(samplesref);
408 link->cur_buf = samplesref;
410 filter_samples(link, link->cur_buf);
413 #define MAX_REGISTERED_AVFILTERS_NB 64
415 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
417 static int next_registered_avfilter_idx = 0;
419 AVFilter *avfilter_get_by_name(const char *name)
423 for (i = 0; registered_avfilters[i]; i++)
424 if (!strcmp(registered_avfilters[i]->name, name))
425 return registered_avfilters[i];
430 int avfilter_register(AVFilter *filter)
432 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
435 registered_avfilters[next_registered_avfilter_idx++] = filter;
439 AVFilter **av_filter_next(AVFilter **filter)
441 return filter ? ++filter : ®istered_avfilters[0];
444 void avfilter_uninit(void)
446 memset(registered_avfilters, 0, sizeof(registered_avfilters));
447 next_registered_avfilter_idx = 0;
450 static int pad_count(const AVFilterPad *pads)
454 for(count = 0; pads->name; count ++) pads ++;
458 static const char *filter_name(void *p)
460 AVFilterContext *filter = p;
461 return filter->filter->name;
464 static const AVClass avfilter_class = {
468 LIBAVUTIL_VERSION_INT,
471 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
473 AVFilterContext *ret;
477 return AVERROR(EINVAL);
479 ret = av_mallocz(sizeof(AVFilterContext));
481 ret->av_class = &avfilter_class;
482 ret->filter = filter;
483 ret->name = inst_name ? av_strdup(inst_name) : NULL;
484 ret->priv = av_mallocz(filter->priv_size);
486 ret->input_count = pad_count(filter->inputs);
487 if (ret->input_count) {
488 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
489 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
490 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
493 ret->output_count = pad_count(filter->outputs);
494 if (ret->output_count) {
495 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
496 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
497 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
504 void avfilter_destroy(AVFilterContext *filter)
508 if (filter->filter->uninit)
509 filter->filter->uninit(filter);
511 for (i = 0; i < filter->input_count; i++) {
512 if (filter->inputs[i]) {
513 if (filter->inputs[i]->src)
514 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
515 avfilter_formats_unref(&filter->inputs[i]->in_formats);
516 avfilter_formats_unref(&filter->inputs[i]->out_formats);
518 av_freep(&filter->inputs[i]);
520 for (i = 0; i < filter->output_count; i++) {
521 if (filter->outputs[i]) {
522 if (filter->outputs[i]->dst)
523 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
524 avfilter_formats_unref(&filter->outputs[i]->in_formats);
525 avfilter_formats_unref(&filter->outputs[i]->out_formats);
527 av_freep(&filter->outputs[i]);
530 av_freep(&filter->name);
531 av_freep(&filter->input_pads);
532 av_freep(&filter->output_pads);
533 av_freep(&filter->inputs);
534 av_freep(&filter->outputs);
535 av_freep(&filter->priv);
539 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
543 if (filter->filter->init)
544 ret = filter->filter->init(filter, args, opaque);