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
28 #include "allfilters.h"
30 /** list of registered filters */
34 struct FilterList *next;
37 /** helper macros to get the in/out pad on the dst/src filter */
38 #define link_dpad(link) link->dst-> input_pads[link->dstpad]
39 #define link_spad(link) link->src->output_pads[link->srcpad]
41 AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
43 AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
46 ret->pic->refcount ++;
50 void avfilter_unref_pic(AVFilterPicRef *ref)
52 if(-- ref->pic->refcount == 0)
53 ref->pic->free(ref->pic);
57 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
58 AVFilterPad **pads, AVFilterLink ***links,
63 idx = FFMIN(idx, *count);
65 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
66 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
67 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
68 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
69 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
73 for(i = idx+1; i < *count; i ++)
75 (*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
78 int avfilter_link(AVFilterContext *src, unsigned srcpad,
79 AVFilterContext *dst, unsigned dstpad)
83 if(src->output_count <= srcpad || dst->input_count <= dstpad ||
84 src->outputs[srcpad] || dst->inputs[dstpad])
87 src->outputs[srcpad] =
88 dst->inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
92 link->srcpad = srcpad;
93 link->dstpad = dstpad;
99 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
100 unsigned in, unsigned out)
102 av_log(NULL, AV_LOG_INFO, "auto-inserting filter '%s'\n",
105 link->dst->inputs[link->dstpad] = NULL;
106 if(avfilter_link(filt, out, link->dst, link->dstpad)) {
107 /* failed to link output filter to new filter */
108 link->dst->inputs[link->dstpad] = link;
112 /* re-hookup the link to the new destination filter we inserted */
115 filt->inputs[in] = link;
117 /* if any information on supported colorspaces already exists on the
118 * link, we need to preserve that */
119 if(link->out_formats) {
120 filt->outputs[out]->out_formats = link->out_formats;
121 link->out_formats = NULL;
127 int avfilter_config_link(AVFilterLink *link)
129 int (*config_link)(AVFilterLink *);
134 if(!(config_link = link_spad(link).config_props))
135 config_link = avfilter_default_config_output_link;
136 if(config_link(link))
139 if(!(config_link = link_dpad(link).config_props))
140 config_link = avfilter_default_config_input_link;
141 if(config_link(link))
147 AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
149 AVFilterPicRef *ret = NULL;
151 if(link_dpad(link).get_video_buffer)
152 ret = link_dpad(link).get_video_buffer(link, perms);
155 ret = avfilter_default_get_video_buffer(link, perms);
160 int avfilter_request_frame(AVFilterLink *link)
162 if(link_spad(link).request_frame)
163 return link_spad(link).request_frame(link);
164 else if(link->src->inputs[0])
165 return avfilter_request_frame(link->src->inputs[0]);
169 /* XXX: should we do the duplicating of the picture ref here, instead of
170 * forcing the source filter to do it? */
171 void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
173 void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
175 if(!(start_frame = link_dpad(link).start_frame))
176 start_frame = avfilter_default_start_frame;
178 /* prepare to copy the picture if it has insufficient permissions */
179 if((link_dpad(link).min_perms & picref->perms) != link_dpad(link).min_perms ||
180 link_dpad(link).rej_perms & picref->perms) {
181 av_log(link->dst, AV_LOG_INFO,
182 "frame copy needed (have perms %x, need %x, reject %x)\n",
184 link_dpad(link).min_perms, link_dpad(link).rej_perms);
186 link->cur_pic = avfilter_default_get_video_buffer(link, link_dpad(link).min_perms);
187 link->srcpic = picref;
190 link->cur_pic = picref;
192 start_frame(link, link->cur_pic);
195 void avfilter_end_frame(AVFilterLink *link)
197 void (*end_frame)(AVFilterLink *);
199 /* unreference the source picture if we're feeding the destination filter
200 * a copied version dues to permission issues */
202 avfilter_unref_pic(link->srcpic);
206 if(!(end_frame = link_dpad(link).end_frame))
207 end_frame = avfilter_default_end_frame;
212 void avfilter_draw_slice(AVFilterLink *link, int y, int h)
214 uint8_t *src[4], *dst[4];
215 int i, j, hsub, vsub;
217 /* copy the slice if needed for permission reasons */
219 avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
221 src[0] = link->srcpic-> data[0] + y * link->srcpic-> linesize[0];
222 dst[0] = link->cur_pic->data[0] + y * link->cur_pic->linesize[0];
223 for(i = 1; i < 4; i ++) {
224 if(link->srcpic->data[i]) {
225 src[i] = link->srcpic-> data[i] + (y >> vsub) * link->srcpic-> linesize[i];
226 dst[i] = link->cur_pic->data[i] + (y >> vsub) * link->cur_pic->linesize[i];
228 src[i] = dst[i] = NULL;
230 for(j = 0; j < h; j ++) {
231 memcpy(dst[0], src[0], link->cur_pic->linesize[0]);
232 src[0] += link->srcpic ->linesize[0];
233 dst[0] += link->cur_pic->linesize[0];
235 for(i = 1; i < 4; i ++) {
236 if(!src[i]) continue;
238 for(j = 0; j < h >> vsub; j ++) {
239 memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
240 src[i] += link->srcpic ->linesize[i];
241 dst[i] += link->cur_pic->linesize[i];
246 if(!link_dpad(link).draw_slice)
249 link_dpad(link).draw_slice(link, y, h);
252 AVFilter *avfilter_get_by_name(char *name)
254 struct FilterList *filt;
256 for(filt = filters; filt; filt = filt->next)
257 if(!strcmp(filt->filter->name, name))
263 void avfilter_register(AVFilter *filter)
265 struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
267 newfilt->filter = filter;
268 newfilt->next = filters;
272 void avfilter_init(void)
274 avfilter_register(&avfilter_vf_crop);
275 avfilter_register(&avfilter_vf_fifo);
276 avfilter_register(&avfilter_vf_fps);
277 avfilter_register(&avfilter_vf_graph);
278 avfilter_register(&avfilter_vf_graphdesc);
279 avfilter_register(&avfilter_vf_graphfile);
280 avfilter_register(&avfilter_vf_negate);
281 avfilter_register(&avfilter_vf_overlay);
282 avfilter_register(&avfilter_vf_passthrough);
283 avfilter_register(&avfilter_vf_scale);
284 avfilter_register(&avfilter_vf_slicify);
285 avfilter_register(&avfilter_vf_split);
286 avfilter_register(&avfilter_vf_vflip);
289 void avfilter_uninit(void)
291 struct FilterList *tmp;
293 for(; filters; filters = tmp) {
299 static int pad_count(const AVFilterPad *pads)
301 AVFilterPad *p = (AVFilterPad *) pads;
304 for(count = 0; p->name; count ++) p ++;
308 static const char *filter_name(void *p)
310 AVFilterContext *filter = p;
311 return filter->filter->name;
314 AVFilterContext *avfilter_open(AVFilter *filter, char *inst_name)
316 AVFilterContext *ret;
321 ret = av_malloc(sizeof(AVFilterContext));
323 ret->av_class = av_mallocz(sizeof(AVClass));
324 ret->av_class->item_name = filter_name;
325 ret->filter = filter;
326 ret->name = inst_name ? av_strdup(inst_name) : NULL;
327 ret->priv = av_mallocz(filter->priv_size);
329 ret->input_count = pad_count(filter->inputs);
330 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
331 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
332 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
334 ret->output_count = pad_count(filter->outputs);
335 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
336 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
337 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
342 void avfilter_destroy(AVFilterContext *filter)
346 if(filter->filter->uninit)
347 filter->filter->uninit(filter);
349 for(i = 0; i < filter->input_count; i ++) {
350 if(filter->inputs[i])
351 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
352 av_freep(&filter->inputs[i]);
354 for(i = 0; i < filter->output_count; i ++) {
355 if(filter->outputs[i])
356 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
357 av_freep(&filter->outputs[i]);
360 av_freep(&filter->name);
361 av_freep(&filter->input_pads);
362 av_freep(&filter->output_pads);
363 av_freep(&filter->inputs);
364 av_freep(&filter->outputs);
365 av_freep(&filter->priv);
366 av_freep(&filter->av_class);
370 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
374 if(filter->filter->init)
375 if((ret = filter->filter->init(filter, args, opaque))) return ret;