Avoid link_dpad() overuse in avfilter_start_frame()
[libav.git] / libavfilter / avfilter.c
CommitLineData
4dbbcdee 1/*
16790dc3 2 * filter layer
4dbbcdee
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3 * copyright (c) 2007 Bobby Bingham
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
4dbbcdee 22#include "avfilter.h"
d72a138e 23#include "allfilters.h"
4dbbcdee 24
6d8c67a7
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25/** list of registered filters */
26struct FilterList
27{
28 AVFilter *filter;
29 struct FilterList *next;
30} *filters = NULL;
4dbbcdee 31
6fb0648d
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32/** helper macros to get the in/out pad on the dst/src filter */
33#define link_dpad(link) link->dst-> input_pads[link->dstpad]
34#define link_spad(link) link->src->output_pads[link->srcpad]
35
269b9847 36AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
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37{
38 AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
cdf2a332 39 *ret = *ref;
efb36bfc 40 ret->perms &= pmask;
4dbbcdee
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41 ret->pic->refcount ++;
42 return ret;
43}
44
45void avfilter_unref_pic(AVFilterPicRef *ref)
46{
e079d22e 47 if(!(--ref->pic->refcount))
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48 ref->pic->free(ref->pic);
49 av_free(ref);
50}
51
24618441
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52void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
53 AVFilterPad **pads, AVFilterLink ***links,
54 AVFilterPad *newpad)
55{
56 unsigned i;
57
58 idx = FFMIN(idx, *count);
59
60 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
61 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
62 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
63 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
64 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
65 (*links)[idx] = NULL;
66
67 (*count) ++;
68 for(i = idx+1; i < *count; i ++)
69 if(*links[i])
70 (*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
71}
72
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73int avfilter_link(AVFilterContext *src, unsigned srcpad,
74 AVFilterContext *dst, unsigned dstpad)
75{
76 AVFilterLink *link;
77
7d0e1392
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78 if(src->output_count <= srcpad || dst->input_count <= dstpad ||
79 src->outputs[srcpad] || dst->inputs[dstpad])
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80 return -1;
81
82 src->outputs[srcpad] =
c949d867 83 dst->inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
4dbbcdee 84
1653c11f
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85 link->src = src;
86 link->dst = dst;
87 link->srcpad = srcpad;
88 link->dstpad = dstpad;
01942f1d
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89 link->format = -1;
90
91 return 0;
92}
93
52362e9d
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94int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
95 unsigned in, unsigned out)
96{
e3065c8b
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97 AVFilterFormats *formats;
98
2c5741b8 99 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s'\n",
52362e9d
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100 filt->filter->name);
101
102 link->dst->inputs[link->dstpad] = NULL;
103 if(avfilter_link(filt, out, link->dst, link->dstpad)) {
104 /* failed to link output filter to new filter */
105 link->dst->inputs[link->dstpad] = link;
106 return -1;
107 }
108
109 /* re-hookup the link to the new destination filter we inserted */
110 link->dst = filt;
111 link->dstpad = in;
112 filt->inputs[in] = link;
113
07d0bba5
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114 /* if any information on supported colorspaces already exists on the
115 * link, we need to preserve that */
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116 if((formats = link->out_formats))
117 avfilter_formats_changeref(&link->out_formats,
118 &filt->outputs[out]->out_formats);
07d0bba5 119
52362e9d
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120 return 0;
121}
122
69818105 123int avfilter_config_links(AVFilterContext *filter)
01942f1d 124{
01942f1d 125 int (*config_link)(AVFilterLink *);
69818105
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126 unsigned i;
127
128 for(i = 0; i < filter->input_count; i ++) {
e079d22e 129 AVFilterLink *link = filter->inputs[i];
d21cbbff 130
e079d22e 131 if(!link) continue;
69818105
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132
133 switch(link->init_state) {
134 case AVLINK_INIT:
135 continue;
136 case AVLINK_STARTINIT:
137 av_log(filter, AV_LOG_ERROR, "circular filter chain detected\n");
138 return -1;
139 case AVLINK_UNINIT:
140 link->init_state = AVLINK_STARTINIT;
141
142 if(avfilter_config_links(link->src))
143 return -1;
4dbbcdee 144
2fd46877
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145 if(!(config_link = link_spad(link).config_props))
146 config_link = avfilter_default_config_output_link;
147 if(config_link(link))
148 return -1;
102fb0e3 149
2fd46877
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150 if((config_link = link_dpad(link).config_props))
151 if(config_link(link))
152 return -1;
102fb0e3 153
69818105
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154 link->init_state = AVLINK_INIT;
155 }
156 }
157
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158 return 0;
159}
160
161AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
162{
163 AVFilterPicRef *ret = NULL;
164
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165 if(link_dpad(link).get_video_buffer)
166 ret = link_dpad(link).get_video_buffer(link, perms);
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167
168 if(!ret)
169 ret = avfilter_default_get_video_buffer(link, perms);
170
171 return ret;
172}
173
3306f8bd 174int avfilter_request_frame(AVFilterLink *link)
4dbbcdee 175{
6fb0648d
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176 if(link_spad(link).request_frame)
177 return link_spad(link).request_frame(link);
9586ba3a 178 else if(link->src->inputs[0])
3306f8bd
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179 return avfilter_request_frame(link->src->inputs[0]);
180 else return -1;
4dbbcdee
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181}
182
7b02c484
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183int avfilter_poll_frame(AVFilterLink *link)
184{
185 int i, min=INT_MAX;
186
187 if(link_spad(link).poll_frame)
188 return link_spad(link).poll_frame(link);
189 else
190 for (i=0; i<link->src->input_count; i++) {
191 if(!link->src->inputs[i])
192 return -1;
193 min = FFMIN(min, avfilter_poll_frame(link->src->inputs[i]));
194 }
195
196 return min;
197}
198
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199/* XXX: should we do the duplicating of the picture ref here, instead of
200 * forcing the source filter to do it? */
201void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
202{
203 void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
ac8a116e 204 AVFilterPad *dst = &link_dpad(link);
4dbbcdee 205
ac8a116e 206 if(!(start_frame = dst->start_frame))
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207 start_frame = avfilter_default_start_frame;
208
c949d867 209 /* prepare to copy the picture if it has insufficient permissions */
ac8a116e
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210 if((dst->min_perms & picref->perms) != dst->min_perms ||
211 dst->rej_perms & picref->perms) {
35db407e 212 /*
c949d867
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213 av_log(link->dst, AV_LOG_INFO,
214 "frame copy needed (have perms %x, need %x, reject %x)\n",
269b9847 215 picref->perms,
c949d867 216 link_dpad(link).min_perms, link_dpad(link).rej_perms);
35db407e 217 */
c949d867 218
ac8a116e 219 link->cur_pic = avfilter_default_get_video_buffer(link, dst->min_perms);
c949d867 220 link->srcpic = picref;
be36bc09 221 link->cur_pic->pts = link->srcpic->pts;
c949d867
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222 }
223 else
224 link->cur_pic = picref;
225
226 start_frame(link, link->cur_pic);
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227}
228
229void avfilter_end_frame(AVFilterLink *link)
230{
231 void (*end_frame)(AVFilterLink *);
232
35db407e
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233 if(!(end_frame = link_dpad(link).end_frame))
234 end_frame = avfilter_default_end_frame;
235
236 end_frame(link);
237
c949d867
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238 /* unreference the source picture if we're feeding the destination filter
239 * a copied version dues to permission issues */
240 if(link->srcpic) {
241 avfilter_unref_pic(link->srcpic);
242 link->srcpic = NULL;
243 }
244
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245}
246
ef35d13a 247void avfilter_draw_slice(AVFilterLink *link, int y, int h)
4dbbcdee 248{
c949d867
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249 uint8_t *src[4], *dst[4];
250 int i, j, hsub, vsub;
251
252 /* copy the slice if needed for permission reasons */
253 if(link->srcpic) {
254 avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
255
256 src[0] = link->srcpic-> data[0] + y * link->srcpic-> linesize[0];
257 dst[0] = link->cur_pic->data[0] + y * link->cur_pic->linesize[0];
258 for(i = 1; i < 4; i ++) {
259 if(link->srcpic->data[i]) {
260 src[i] = link->srcpic-> data[i] + (y >> vsub) * link->srcpic-> linesize[i];
261 dst[i] = link->cur_pic->data[i] + (y >> vsub) * link->cur_pic->linesize[i];
262 } else
263 src[i] = dst[i] = NULL;
264 }
19dc7104
VS
265
266 for(i = 0; i < 4; i ++) {
c949d867
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267 if(!src[i]) continue;
268
19dc7104 269 for(j = 0; j < h >> (i==0 ? 0 : vsub); j ++) {
c949d867
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270 memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
271 src[i] += link->srcpic ->linesize[i];
272 dst[i] += link->cur_pic->linesize[i];
273 }
274 }
275 }
276
6fb0648d 277 if(!link_dpad(link).draw_slice)
7d0e1392
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278 return;
279
6fb0648d 280 link_dpad(link).draw_slice(link, y, h);
4dbbcdee
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281}
282
05decb00 283AVFilter *avfilter_get_by_name(const char *name)
4dbbcdee 284{
6d8c67a7
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285 struct FilterList *filt;
286
287 for(filt = filters; filt; filt = filt->next)
288 if(!strcmp(filt->filter->name, name))
289 return filt->filter;
4dbbcdee 290
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291 return NULL;
292}
293
4dbbcdee
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294void avfilter_register(AVFilter *filter)
295{
6d8c67a7
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296 struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
297
298 newfilt->filter = filter;
299 newfilt->next = filters;
300 filters = newfilt;
4dbbcdee
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301}
302
303void avfilter_init(void)
304{
7bce27a3
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305 avfilter_register(&avfilter_vf_crop);
306 avfilter_register(&avfilter_vf_fifo);
e946c25a 307 avfilter_register(&avfilter_vf_format);
7bce27a3
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308 avfilter_register(&avfilter_vf_fps);
309 avfilter_register(&avfilter_vf_graph);
310 avfilter_register(&avfilter_vf_graphdesc);
311 avfilter_register(&avfilter_vf_graphfile);
c35a0473 312 avfilter_register(&avfilter_vf_hflip);
f9033975 313 avfilter_register(&avfilter_vf_negate);
cc0bb5a1 314 avfilter_register(&avfilter_vf_noformat);
7bce27a3 315 avfilter_register(&avfilter_vf_overlay);
0970ec6a 316 avfilter_register(&avfilter_vf_rotate);
2a553ef5 317 avfilter_register(&avfilter_vf_scale);
0970ec6a 318 avfilter_register(&avfilter_vf_setpts);
7bce27a3
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319 avfilter_register(&avfilter_vf_slicify);
320 avfilter_register(&avfilter_vf_split);
be696990 321 avfilter_register(&avfilter_vf_transpose);
7bce27a3 322 avfilter_register(&avfilter_vf_vflip);
b62966c0
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323#ifdef CONFIG_AVFILTER_LAVF
324 avfilter_register(&avfilter_vsrc_movie);
325#endif //CONFIG_AVFILTER_LAVF
4dbbcdee
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326}
327
328void avfilter_uninit(void)
329{
6d8c67a7
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330 struct FilterList *tmp;
331
332 for(; filters; filters = tmp) {
333 tmp = filters->next;
334 av_free(filters);
335 }
4dbbcdee
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336}
337
338static int pad_count(const AVFilterPad *pads)
339{
4dbbcdee
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340 int count;
341
05decb00 342 for(count = 0; pads->name; count ++) pads ++;
4dbbcdee
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343 return count;
344}
345
346static const char *filter_name(void *p)
347{
348 AVFilterContext *filter = p;
349 return filter->filter->name;
350}
351
05decb00 352AVFilterContext *avfilter_open(AVFilter *filter, const char *inst_name)
4dbbcdee 353{
8f618f4c
VS
354 AVFilterContext *ret;
355
356 if (!filter)
357 return 0;
358
359 ret = av_malloc(sizeof(AVFilterContext));
4dbbcdee
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360
361 ret->av_class = av_mallocz(sizeof(AVClass));
362 ret->av_class->item_name = filter_name;
363 ret->filter = filter;
2350e69c 364 ret->name = inst_name ? av_strdup(inst_name) : NULL;
4dbbcdee
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365 ret->priv = av_mallocz(filter->priv_size);
366
7d0e1392 367 ret->input_count = pad_count(filter->inputs);
c5ef7d7b
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368 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
369 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
7d0e1392 370 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
c5ef7d7b 371
7d0e1392 372 ret->output_count = pad_count(filter->outputs);
c5ef7d7b
VS
373 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
374 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
7d0e1392
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375 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
376
4dbbcdee
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377 return ret;
378}
379
380void avfilter_destroy(AVFilterContext *filter)
381{
382 int i;
383
384 if(filter->filter->uninit)
385 filter->filter->uninit(filter);
386
c5ef7d7b 387 for(i = 0; i < filter->input_count; i ++) {
4dbbcdee
VS
388 if(filter->inputs[i])
389 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
f4cb4462 390 av_freep(&filter->inputs[i]);
4dbbcdee 391 }
c5ef7d7b 392 for(i = 0; i < filter->output_count; i ++) {
4dbbcdee
VS
393 if(filter->outputs[i])
394 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
f4cb4462 395 av_freep(&filter->outputs[i]);
4dbbcdee
VS
396 }
397
f4cb4462
VS
398 av_freep(&filter->name);
399 av_freep(&filter->input_pads);
400 av_freep(&filter->output_pads);
401 av_freep(&filter->inputs);
402 av_freep(&filter->outputs);
403 av_freep(&filter->priv);
404 av_freep(&filter->av_class);
4dbbcdee
VS
405 av_free(filter);
406}
407
a360f71e 408int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
4dbbcdee 409{
e079d22e 410 int ret=0;
4dbbcdee
VS
411
412 if(filter->filter->init)
e079d22e
VS
413 ret = filter->filter->init(filter, args, opaque);
414 return ret;
4dbbcdee
VS
415}
416