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" a:%d/%d s:%dx%d]%s",
200 picref->linesize[0], picref->linesize[1], picref->linesize[2], picref->linesize[3],
201 picref->pts, picref->pos,
202 picref->video->pixel_aspect.num, picref->video->pixel_aspect.den, picref->video->w, picref->video->h,
206 void ff_dprintf_link(void *ctx, AVFilterLink *link, int end)
209 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
210 link, link->w, link->h,
211 av_pix_fmt_descriptors[link->format].name,
212 link->src ? link->src->filter->name : "",
213 link->dst ? link->dst->filter->name : "",
217 AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
219 AVFilterBufferRef *ret = NULL;
221 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);
223 if (link_dpad(link).get_video_buffer)
224 ret = link_dpad(link).get_video_buffer(link, perms, w, h);
227 ret = avfilter_default_get_video_buffer(link, perms, w, h);
230 ret->type = AVMEDIA_TYPE_VIDEO;
232 FF_DPRINTF_START(NULL, get_video_buffer); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " returning "); ff_dprintf_picref(NULL, ret, 1);
237 AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
238 enum SampleFormat sample_fmt, int size,
239 int64_t channel_layout, int planar)
241 AVFilterBufferRef *ret = NULL;
243 if (link_dpad(link).get_audio_buffer)
244 ret = link_dpad(link).get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
247 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
250 ret->type = AVMEDIA_TYPE_AUDIO;
255 int avfilter_request_frame(AVFilterLink *link)
257 FF_DPRINTF_START(NULL, request_frame); ff_dprintf_link(NULL, link, 1);
259 if (link_spad(link).request_frame)
260 return link_spad(link).request_frame(link);
261 else if (link->src->inputs[0])
262 return avfilter_request_frame(link->src->inputs[0]);
266 int avfilter_poll_frame(AVFilterLink *link)
268 int i, min = INT_MAX;
270 if (link_spad(link).poll_frame)
271 return link_spad(link).poll_frame(link);
273 for (i = 0; i < link->src->input_count; i++) {
275 if (!link->src->inputs[i])
277 val = avfilter_poll_frame(link->src->inputs[i]);
278 min = FFMIN(min, val);
284 /* XXX: should we do the duplicating of the picture ref here, instead of
285 * forcing the source filter to do it? */
286 void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
288 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
289 AVFilterPad *dst = &link_dpad(link);
291 FF_DPRINTF_START(NULL, start_frame); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " "); ff_dprintf_picref(NULL, picref, 1);
293 if (!(start_frame = dst->start_frame))
294 start_frame = avfilter_default_start_frame;
296 /* prepare to copy the picture if it has insufficient permissions */
297 if ((dst->min_perms & picref->perms) != dst->min_perms ||
298 dst->rej_perms & picref->perms) {
299 av_log(link->dst, AV_LOG_DEBUG,
300 "frame copy needed (have perms %x, need %x, reject %x)\n",
302 link_dpad(link).min_perms, link_dpad(link).rej_perms);
304 link->cur_buf = avfilter_default_get_video_buffer(link, dst->min_perms, link->w, link->h);
305 link->src_buf = picref;
306 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
309 link->cur_buf = picref;
311 start_frame(link, link->cur_buf);
314 void avfilter_end_frame(AVFilterLink *link)
316 void (*end_frame)(AVFilterLink *);
318 if (!(end_frame = link_dpad(link).end_frame))
319 end_frame = avfilter_default_end_frame;
323 /* unreference the source picture if we're feeding the destination filter
324 * a copied version dues to permission issues */
326 avfilter_unref_buffer(link->src_buf);
327 link->src_buf = NULL;
331 void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
333 uint8_t *src[4], *dst[4];
335 void (*draw_slice)(AVFilterLink *, int, int, int);
337 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);
339 /* copy the slice if needed for permission reasons */
341 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
343 for (i = 0; i < 4; i++) {
344 if (link->src_buf->data[i]) {
345 src[i] = link->src_buf-> data[i] +
346 (y >> (i==0 ? 0 : vsub)) * link->src_buf-> linesize[i];
347 dst[i] = link->cur_buf->data[i] +
348 (y >> (i==0 ? 0 : vsub)) * link->cur_buf->linesize[i];
350 src[i] = dst[i] = NULL;
353 for (i = 0; i < 4; i++) {
355 av_get_image_linesize(link->format, link->cur_buf->video->w, i);
357 if (!src[i]) continue;
359 for (j = 0; j < h >> (i==0 ? 0 : vsub); j++) {
360 memcpy(dst[i], src[i], planew);
361 src[i] += link->src_buf->linesize[i];
362 dst[i] += link->cur_buf->linesize[i];
367 if (!(draw_slice = link_dpad(link).draw_slice))
368 draw_slice = avfilter_default_draw_slice;
369 draw_slice(link, y, h, slice_dir);
372 void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
374 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
375 AVFilterPad *dst = &link_dpad(link);
377 if (!(filter_samples = dst->filter_samples))
378 filter_samples = avfilter_default_filter_samples;
380 /* prepare to copy the samples if the buffer has insufficient permissions */
381 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
382 dst->rej_perms & samplesref->perms) {
384 av_log(link->dst, AV_LOG_DEBUG,
385 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
386 samplesref->perms, link_dpad(link).min_perms, link_dpad(link).rej_perms);
388 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
390 samplesref->audio->size,
391 samplesref->audio->channel_layout,
392 samplesref->audio->planar);
393 link->cur_buf->pts = samplesref->pts;
394 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
396 /* Copy actual data into new samples buffer */
397 memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
399 avfilter_unref_buffer(samplesref);
401 link->cur_buf = samplesref;
403 filter_samples(link, link->cur_buf);
406 #define MAX_REGISTERED_AVFILTERS_NB 64
408 static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
410 static int next_registered_avfilter_idx = 0;
412 AVFilter *avfilter_get_by_name(const char *name)
416 for (i = 0; registered_avfilters[i]; i++)
417 if (!strcmp(registered_avfilters[i]->name, name))
418 return registered_avfilters[i];
423 int avfilter_register(AVFilter *filter)
425 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
428 registered_avfilters[next_registered_avfilter_idx++] = filter;
432 AVFilter **av_filter_next(AVFilter **filter)
434 return filter ? ++filter : ®istered_avfilters[0];
437 void avfilter_uninit(void)
439 memset(registered_avfilters, 0, sizeof(registered_avfilters));
440 next_registered_avfilter_idx = 0;
443 static int pad_count(const AVFilterPad *pads)
447 for(count = 0; pads->name; count ++) pads ++;
451 static const char *filter_name(void *p)
453 AVFilterContext *filter = p;
454 return filter->filter->name;
457 static const AVClass avfilter_class = {
461 LIBAVUTIL_VERSION_INT,
464 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
466 AVFilterContext *ret;
470 return AVERROR(EINVAL);
472 ret = av_mallocz(sizeof(AVFilterContext));
474 ret->av_class = &avfilter_class;
475 ret->filter = filter;
476 ret->name = inst_name ? av_strdup(inst_name) : NULL;
477 ret->priv = av_mallocz(filter->priv_size);
479 ret->input_count = pad_count(filter->inputs);
480 if (ret->input_count) {
481 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
482 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
483 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
486 ret->output_count = pad_count(filter->outputs);
487 if (ret->output_count) {
488 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
489 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
490 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
497 void avfilter_destroy(AVFilterContext *filter)
501 if (filter->filter->uninit)
502 filter->filter->uninit(filter);
504 for (i = 0; i < filter->input_count; i++) {
505 if (filter->inputs[i]) {
506 if (filter->inputs[i]->src)
507 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
508 avfilter_formats_unref(&filter->inputs[i]->in_formats);
509 avfilter_formats_unref(&filter->inputs[i]->out_formats);
511 av_freep(&filter->inputs[i]);
513 for (i = 0; i < filter->output_count; i++) {
514 if (filter->outputs[i]) {
515 if (filter->outputs[i]->dst)
516 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
517 avfilter_formats_unref(&filter->outputs[i]->in_formats);
518 avfilter_formats_unref(&filter->outputs[i]->out_formats);
520 av_freep(&filter->outputs[i]);
523 av_freep(&filter->name);
524 av_freep(&filter->input_pads);
525 av_freep(&filter->output_pads);
526 av_freep(&filter->inputs);
527 av_freep(&filter->outputs);
528 av_freep(&filter->priv);
532 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
536 if (filter->filter->init)
537 ret = filter->filter->init(filter, args, opaque);