replace FFMPEG with LIBAV in FFMPEG_CONFIGURATION
[libav.git] / libavfilter / avfilter.c
CommitLineData
4dbbcdee 1/*
16790dc3 2 * filter layer
3fa77bde 3 * Copyright (c) 2007 Bobby Bingham
4dbbcdee
VS
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
96da1c51
SS
22/* #define DEBUG */
23
b4b66456 24#include "libavutil/pixdesc.h"
867ae7aa 25#include "libavutil/rational.h"
737eb597
RT
26#include "libavutil/audioconvert.h"
27#include "libavutil/imgutils.h"
4dbbcdee 28#include "avfilter.h"
9f0e31d2 29#include "internal.h"
4dbbcdee 30
540f1c7b
SS
31unsigned avfilter_version(void) {
32 return LIBAVFILTER_VERSION_INT;
33}
34
41600690 35const char *avfilter_configuration(void)
c1736936 36{
29ba0911 37 return LIBAV_CONFIGURATION;
c1736936
DB
38}
39
41600690 40const char *avfilter_license(void)
c1736936
DB
41{
42#define LICENSE_PREFIX "libavfilter license: "
43 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
44}
45
7fce481a 46AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
4dbbcdee 47{
ecc8dada 48 AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
4f9ce3c4
SS
49 if (!ret)
50 return NULL;
cdf2a332 51 *ret = *ref;
cc80caff
HM
52 if (ref->type == AVMEDIA_TYPE_VIDEO) {
53 ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
4f9ce3c4
SS
54 if (!ret->video) {
55 av_free(ret);
56 return NULL;
57 }
cc80caff 58 *ret->video = *ref->video;
ad2c9501
HM
59 } else if (ref->type == AVMEDIA_TYPE_AUDIO) {
60 ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
61 if (!ret->audio) {
62 av_free(ret);
63 return NULL;
64 }
65 *ret->audio = *ref->audio;
cc80caff 66 }
efb36bfc 67 ret->perms &= pmask;
7fce481a 68 ret->buf->refcount ++;
4dbbcdee
VS
69 return ret;
70}
71
7fce481a 72void avfilter_unref_buffer(AVFilterBufferRef *ref)
4dbbcdee 73{
6baf4afa
SS
74 if (!ref)
75 return;
ca857431 76 if (!(--ref->buf->refcount))
7fce481a 77 ref->buf->free(ref->buf);
cc80caff 78 av_free(ref->video);
ad2c9501 79 av_free(ref->audio);
4dbbcdee
VS
80 av_free(ref);
81}
82
24618441
VS
83void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
84 AVFilterPad **pads, AVFilterLink ***links,
85 AVFilterPad *newpad)
86{
87 unsigned i;
88
89 idx = FFMIN(idx, *count);
90
91 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
92 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
93 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
94 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
95 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
96 (*links)[idx] = NULL;
97
ca857431
SS
98 (*count)++;
99 for (i = idx+1; i < *count; i++)
100 if (*links[i])
101 (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
24618441
VS
102}
103
4dbbcdee
VS
104int avfilter_link(AVFilterContext *src, unsigned srcpad,
105 AVFilterContext *dst, unsigned dstpad)
106{
107 AVFilterLink *link;
108
ca857431
SS
109 if (src->output_count <= srcpad || dst->input_count <= dstpad ||
110 src->outputs[srcpad] || dst->inputs[dstpad])
4dbbcdee
VS
111 return -1;
112
891aeeee
SS
113 if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
114 av_log(src, AV_LOG_ERROR,
115 "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
116 src->name, srcpad, dst->name, dstpad);
117 return AVERROR(EINVAL);
118 }
119
4dbbcdee 120 src->outputs[srcpad] =
b3431ecd 121 dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
4dbbcdee 122
1653c11f
VS
123 link->src = src;
124 link->dst = dst;
acc0490f
SS
125 link->srcpad = &src->output_pads[srcpad];
126 link->dstpad = &dst->input_pads[dstpad];
bdab614b 127 link->type = src->output_pads[srcpad].type;
5d6e4c16 128 assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
bdab614b 129 link->format = -1;
01942f1d
VS
130
131 return 0;
132}
133
52362e9d 134int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
486adc55 135 unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
52362e9d 136{
db9dfa3c 137 int ret;
acc0490f
SS
138 unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
139
08f8b51f
SS
140 av_log(link->dst, AV_LOG_INFO, "auto-inserting filter '%s' "
141 "between the filter '%s' and the filter '%s'\n",
142 filt->name, link->src->name, link->dst->name);
52362e9d 143
acc0490f 144 link->dst->inputs[dstpad_idx] = NULL;
486adc55 145 if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
52362e9d 146 /* failed to link output filter to new filter */
acc0490f 147 link->dst->inputs[dstpad_idx] = link;
db9dfa3c 148 return ret;
52362e9d
VS
149 }
150
151 /* re-hookup the link to the new destination filter we inserted */
152 link->dst = filt;
486adc55
SS
153 link->dstpad = &filt->input_pads[filt_srcpad_idx];
154 filt->inputs[filt_srcpad_idx] = link;
52362e9d 155
bdab614b 156 /* if any information on supported media formats already exists on the
07d0bba5 157 * link, we need to preserve that */
ca857431 158 if (link->out_formats)
e3065c8b 159 avfilter_formats_changeref(&link->out_formats,
486adc55 160 &filt->outputs[filt_dstpad_idx]->out_formats);
07d0bba5 161
52362e9d
VS
162 return 0;
163}
164
69818105 165int avfilter_config_links(AVFilterContext *filter)
01942f1d 166{
01942f1d 167 int (*config_link)(AVFilterLink *);
69818105 168 unsigned i;
69f73a89 169 int ret;
69818105 170
ca857431 171 for (i = 0; i < filter->input_count; i ++) {
e079d22e 172 AVFilterLink *link = filter->inputs[i];
d21cbbff 173
ca857431 174 if (!link) continue;
69818105 175
ca857431 176 switch (link->init_state) {
69818105
VS
177 case AVLINK_INIT:
178 continue;
179 case AVLINK_STARTINIT:
7a9fd2a0
VS
180 av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
181 return 0;
69818105
VS
182 case AVLINK_UNINIT:
183 link->init_state = AVLINK_STARTINIT;
184
69f73a89
SS
185 if ((ret = avfilter_config_links(link->src)) < 0)
186 return ret;
4dbbcdee 187
acc0490f 188 if (!(config_link = link->srcpad->config_props))
2fd46877 189 config_link = avfilter_default_config_output_link;
69f73a89
SS
190 if ((ret = config_link(link)) < 0)
191 return ret;
102fb0e3 192
867ae7aa 193 if (link->time_base.num == 0 && link->time_base.den == 0)
cf5fe8ec
SS
194 link->time_base = link->src && link->src->input_count ?
195 link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
867ae7aa 196
910b5b82
MN
197 if (link->sample_aspect_ratio.num == 0 && link->sample_aspect_ratio.den == 0)
198 link->sample_aspect_ratio = link->src->input_count ?
199 link->src->inputs[0]->sample_aspect_ratio : (AVRational){1,1};
200
70c275f8
SS
201 if (link->sample_rate == 0 && link->src && link->src->input_count)
202 link->sample_rate = link->src->inputs[0]->sample_rate;
203
204 if (link->channel_layout == 0 && link->src && link->src->input_count)
205 link->channel_layout = link->src->inputs[0]->channel_layout;
206
acc0490f 207 if ((config_link = link->dstpad->config_props))
69f73a89
SS
208 if ((ret = config_link(link)) < 0)
209 return ret;
102fb0e3 210
69818105
VS
211 link->init_state = AVLINK_INIT;
212 }
213 }
214
4dbbcdee
VS
215 return 0;
216}
217
eb7ccf8f 218static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
eedca998 219{
0ccabeea 220 snprintf(buf, buf_size, "%s%s%s%s%s%s",
eedca998
SS
221 perms & AV_PERM_READ ? "r" : "",
222 perms & AV_PERM_WRITE ? "w" : "",
223 perms & AV_PERM_PRESERVE ? "p" : "",
906eaab4 224 perms & AV_PERM_REUSE ? "u" : "",
0ccabeea
MN
225 perms & AV_PERM_REUSE2 ? "U" : "",
226 perms & AV_PERM_NEG_LINESIZES ? "n" : "");
eedca998
SS
227 return buf;
228}
229
dfd2a005 230static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
96da1c51 231{
eedca998 232 av_unused char buf[16];
dfd2a005 233 av_dlog(ctx,
eedca998
SS
234 "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
235 ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
b5fbb31e
SS
236 ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
237 ref->pts, ref->pos);
382ecd35 238
b5fbb31e 239 if (ref->video) {
dfd2a005 240 av_dlog(ctx, " a:%d/%d s:%dx%d i:%c",
b5fbb31e
SS
241 ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
242 ref->video->w, ref->video->h,
243 !ref->video->interlaced ? 'P' : /* Progressive */
244 ref->video->top_field_first ? 'T' : 'B'); /* Top / Bottom */
382ecd35 245 }
014df3a2 246 if (ref->audio) {
dfd2a005 247 av_dlog(ctx, " cl:%"PRId64"d sn:%d s:%d sr:%d p:%d",
014df3a2 248 ref->audio->channel_layout,
a242ac36 249 ref->audio->nb_samples,
014df3a2
SS
250 ref->audio->size,
251 ref->audio->sample_rate,
252 ref->audio->planar);
253 }
254
dfd2a005 255 av_dlog(ctx, "]%s", end ? "\n" : "");
96da1c51
SS
256}
257
dfd2a005 258static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
96da1c51 259{
7986e34d 260 if (link->type == AVMEDIA_TYPE_VIDEO) {
dfd2a005 261 av_dlog(ctx,
1d5b1885
SS
262 "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
263 link, link->w, link->h,
264 av_pix_fmt_descriptors[link->format].name,
265 link->src ? link->src->filter->name : "",
266 link->dst ? link->dst->filter->name : "",
267 end ? "\n" : "");
7986e34d
SS
268 } else {
269 char buf[128];
270 av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
271
dfd2a005 272 av_dlog(ctx,
7986e34d
SS
273 "link[%p r:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",
274 link, link->sample_rate, buf,
275 av_get_sample_fmt_name(link->format),
276 link->src ? link->src->filter->name : "",
277 link->dst ? link->dst->filter->name : "",
278 end ? "\n" : "");
279 }
96da1c51
SS
280}
281
dfd2a005 282#define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
eb7ccf8f 283
ecc8dada 284AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
4dbbcdee 285{
ecc8dada 286 AVFilterBufferRef *ret = NULL;
4dbbcdee 287
eedca998 288 av_unused char buf[16];
dfd2a005
LB
289 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
290 av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
96da1c51 291
acc0490f
SS
292 if (link->dstpad->get_video_buffer)
293 ret = link->dstpad->get_video_buffer(link, perms, w, h);
0eb4ff9e 294
ca857431 295 if (!ret)
0eb4ff9e 296 ret = avfilter_default_get_video_buffer(link, perms, w, h);
4dbbcdee 297
382ac60e
HM
298 if (ret)
299 ret->type = AVMEDIA_TYPE_VIDEO;
300
dfd2a005 301 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
96da1c51 302
4dbbcdee
VS
303 return ret;
304}
305
d38c340f
SS
306AVFilterBufferRef *
307avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
308 int w, int h, enum PixelFormat format)
309{
310 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
311 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
312
313 if (!pic || !picref)
314 goto fail;
315
316 picref->buf = pic;
317 picref->buf->free = ff_avfilter_default_free_buffer;
318 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
319 goto fail;
320
36dc00de
MN
321 pic->w = picref->video->w = w;
322 pic->h = picref->video->h = h;
d38c340f
SS
323
324 /* make sure the buffer gets read permission or it's useless for output */
325 picref->perms = perms | AV_PERM_READ;
326
327 pic->refcount = 1;
328 picref->type = AVMEDIA_TYPE_VIDEO;
36dc00de 329 pic->format = picref->format = format;
d38c340f
SS
330
331 memcpy(pic->data, data, sizeof(pic->data));
332 memcpy(pic->linesize, linesize, sizeof(pic->linesize));
333 memcpy(picref->data, pic->data, sizeof(picref->data));
334 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
335
336 return picref;
337
338fail:
339 if (picref && picref->video)
340 av_free(picref->video);
341 av_free(picref);
342 av_free(pic);
343 return NULL;
344}
345
ad2c9501 346AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
5d6e4c16 347 enum AVSampleFormat sample_fmt, int size,
ad2c9501
HM
348 int64_t channel_layout, int planar)
349{
350 AVFilterBufferRef *ret = NULL;
351
acc0490f
SS
352 if (link->dstpad->get_audio_buffer)
353 ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
ad2c9501
HM
354
355 if (!ret)
356 ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
357
358 if (ret)
359 ret->type = AVMEDIA_TYPE_AUDIO;
360
361 return ret;
362}
363
3306f8bd 364int avfilter_request_frame(AVFilterLink *link)
4dbbcdee 365{
dfd2a005 366 FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
96da1c51 367
acc0490f
SS
368 if (link->srcpad->request_frame)
369 return link->srcpad->request_frame(link);
ca857431 370 else if (link->src->inputs[0])
3306f8bd
VS
371 return avfilter_request_frame(link->src->inputs[0]);
372 else return -1;
4dbbcdee
VS
373}
374
7b02c484
VS
375int avfilter_poll_frame(AVFilterLink *link)
376{
ca857431 377 int i, min = INT_MAX;
7b02c484 378
acc0490f
SS
379 if (link->srcpad->poll_frame)
380 return link->srcpad->poll_frame(link);
c245ddf2 381
ca857431 382 for (i = 0; i < link->src->input_count; i++) {
9dd08b4e 383 int val;
ca857431 384 if (!link->src->inputs[i])
c245ddf2 385 return -1;
9dd08b4e
VS
386 val = avfilter_poll_frame(link->src->inputs[i]);
387 min = FFMIN(min, val);
c245ddf2 388 }
7b02c484
VS
389
390 return min;
391}
392
4dbbcdee
VS
393/* XXX: should we do the duplicating of the picture ref here, instead of
394 * forcing the source filter to do it? */
ecc8dada 395void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
4dbbcdee 396{
ecc8dada 397 void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
acc0490f 398 AVFilterPad *dst = link->dstpad;
0ccabeea 399 int perms = picref->perms;
4dbbcdee 400
dfd2a005 401 FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
96da1c51 402
ca857431 403 if (!(start_frame = dst->start_frame))
4dbbcdee
VS
404 start_frame = avfilter_default_start_frame;
405
0ccabeea
MN
406 if (picref->linesize[0] < 0)
407 perms |= AV_PERM_NEG_LINESIZES;
c949d867 408 /* prepare to copy the picture if it has insufficient permissions */
0ccabeea 409 if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
dc46661a 410 av_log(link->dst, AV_LOG_DEBUG,
c949d867 411 "frame copy needed (have perms %x, need %x, reject %x)\n",
269b9847 412 picref->perms,
acc0490f 413 link->dstpad->min_perms, link->dstpad->rej_perms);
c949d867 414
5a9dd3de 415 link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
5d4890d7
HM
416 link->src_buf = picref;
417 avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
c949d867
VS
418 }
419 else
5d4890d7 420 link->cur_buf = picref;
c949d867 421
5d4890d7 422 start_frame(link, link->cur_buf);
4dbbcdee
VS
423}
424
425void avfilter_end_frame(AVFilterLink *link)
426{
427 void (*end_frame)(AVFilterLink *);
428
acc0490f 429 if (!(end_frame = link->dstpad->end_frame))
35db407e
VS
430 end_frame = avfilter_default_end_frame;
431
432 end_frame(link);
433
c949d867
VS
434 /* unreference the source picture if we're feeding the destination filter
435 * a copied version dues to permission issues */
ca857431 436 if (link->src_buf) {
5d4890d7
HM
437 avfilter_unref_buffer(link->src_buf);
438 link->src_buf = NULL;
c949d867 439 }
4dbbcdee
VS
440}
441
a13a5437 442void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
4dbbcdee 443{
c949d867 444 uint8_t *src[4], *dst[4];
2bb96256 445 int i, j, vsub;
a13a5437 446 void (*draw_slice)(AVFilterLink *, int, int, int);
c949d867 447
dfd2a005 448 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);
96da1c51 449
c949d867 450 /* copy the slice if needed for permission reasons */
ca857431 451 if (link->src_buf) {
b4b66456 452 vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
c949d867 453
ca857431
SS
454 for (i = 0; i < 4; i++) {
455 if (link->src_buf->data[i]) {
5d4890d7 456 src[i] = link->src_buf-> data[i] +
fee0deb6 457 (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
5d4890d7 458 dst[i] = link->cur_buf->data[i] +
fee0deb6 459 (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
c949d867
VS
460 } else
461 src[i] = dst[i] = NULL;
462 }
19dc7104 463
ca857431 464 for (i = 0; i < 4; i++) {
805d0232 465 int planew =
e16f217c 466 av_image_get_linesize(link->format, link->cur_buf->video->w, i);
805d0232 467
ca857431 468 if (!src[i]) continue;
c949d867 469
fee0deb6 470 for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
805d0232 471 memcpy(dst[i], src[i], planew);
ca857431 472 src[i] += link->src_buf->linesize[i];
5d4890d7 473 dst[i] += link->cur_buf->linesize[i];
c949d867
VS
474 }
475 }
476 }
477
acc0490f 478 if (!(draw_slice = link->dstpad->draw_slice))
b9609848 479 draw_slice = avfilter_default_draw_slice;
a13a5437 480 draw_slice(link, y, h, slice_dir);
4dbbcdee
VS
481}
482
ad2c9501
HM
483void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
484{
485 void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
acc0490f 486 AVFilterPad *dst = link->dstpad;
ad2c9501 487
5fce60c3
SS
488 FF_DPRINTF_START(NULL, filter_samples); ff_dlog_link(NULL, link, 1);
489
ad2c9501
HM
490 if (!(filter_samples = dst->filter_samples))
491 filter_samples = avfilter_default_filter_samples;
492
493 /* prepare to copy the samples if the buffer has insufficient permissions */
494 if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
495 dst->rej_perms & samplesref->perms) {
496
497 av_log(link->dst, AV_LOG_DEBUG,
498 "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
acc0490f 499 samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
ad2c9501
HM
500
501 link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
502 samplesref->format,
503 samplesref->audio->size,
504 samplesref->audio->channel_layout,
505 samplesref->audio->planar);
506 link->cur_buf->pts = samplesref->pts;
507 link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
508
509 /* Copy actual data into new samples buffer */
510 memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
511
512 avfilter_unref_buffer(samplesref);
513 } else
514 link->cur_buf = samplesref;
515
516 filter_samples(link, link->cur_buf);
517}
518
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519#define MAX_REGISTERED_AVFILTERS_NB 64
520
521static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
522
523static int next_registered_avfilter_idx = 0;
3555d2e8 524
05decb00 525AVFilter *avfilter_get_by_name(const char *name)
4dbbcdee 526{
86a60fa1 527 int i;
6d8c67a7 528
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529 for (i = 0; registered_avfilters[i]; i++)
530 if (!strcmp(registered_avfilters[i]->name, name))
531 return registered_avfilters[i];
4dbbcdee 532
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533 return NULL;
534}
535
86a60fa1 536int avfilter_register(AVFilter *filter)
4dbbcdee 537{
86a60fa1
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538 if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
539 return -1;
6d8c67a7 540
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541 registered_avfilters[next_registered_avfilter_idx++] = filter;
542 return 0;
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543}
544
1433c4ab
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545AVFilter **av_filter_next(AVFilter **filter)
546{
547 return filter ? ++filter : &registered_avfilters[0];
548}
549
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550void avfilter_uninit(void)
551{
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552 memset(registered_avfilters, 0, sizeof(registered_avfilters));
553 next_registered_avfilter_idx = 0;
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554}
555
556static int pad_count(const AVFilterPad *pads)
557{
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558 int count;
559
05decb00 560 for(count = 0; pads->name; count ++) pads ++;
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561 return count;
562}
563
564static const char *filter_name(void *p)
565{
566 AVFilterContext *filter = p;
567 return filter->filter->name;
568}
569
b049ad50
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570static const AVClass avfilter_class = {
571 "AVFilter",
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572 filter_name,
573 NULL,
574 LIBAVUTIL_VERSION_INT,
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575};
576
84c03869 577int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
4dbbcdee 578{
8f618f4c 579 AVFilterContext *ret;
84c03869 580 *filter_ctx = NULL;
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581
582 if (!filter)
84c03869 583 return AVERROR(EINVAL);
8f618f4c 584
689a5f49 585 ret = av_mallocz(sizeof(AVFilterContext));
4dbbcdee 586
b049ad50 587 ret->av_class = &avfilter_class;
4dbbcdee 588 ret->filter = filter;
2350e69c 589 ret->name = inst_name ? av_strdup(inst_name) : NULL;
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590 ret->priv = av_mallocz(filter->priv_size);
591
7d0e1392 592 ret->input_count = pad_count(filter->inputs);
689a5f49 593 if (ret->input_count) {
90993b38
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594 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
595 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
596 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
689a5f49 597 }
c5ef7d7b 598
7d0e1392 599 ret->output_count = pad_count(filter->outputs);
689a5f49 600 if (ret->output_count) {
90993b38
SS
601 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
602 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
603 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
689a5f49 604 }
7d0e1392 605
84c03869
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606 *filter_ctx = ret;
607 return 0;
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608}
609
24de0edb 610void avfilter_free(AVFilterContext *filter)
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611{
612 int i;
b1a05b82 613 AVFilterLink *link;
4dbbcdee 614
ca857431 615 if (filter->filter->uninit)
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616 filter->filter->uninit(filter);
617
ca857431 618 for (i = 0; i < filter->input_count; i++) {
b1a05b82
SS
619 if ((link = filter->inputs[i])) {
620 if (link->src)
acc0490f 621 link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
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622 avfilter_formats_unref(&link->in_formats);
623 avfilter_formats_unref(&link->out_formats);
f3b90d25 624 }
b1a05b82 625 av_freep(&link);
4dbbcdee 626 }
ca857431 627 for (i = 0; i < filter->output_count; i++) {
b1a05b82
SS
628 if ((link = filter->outputs[i])) {
629 if (link->dst)
acc0490f 630 link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
b1a05b82
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631 avfilter_formats_unref(&link->in_formats);
632 avfilter_formats_unref(&link->out_formats);
f3b90d25 633 }
b1a05b82 634 av_freep(&link);
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635 }
636
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637 av_freep(&filter->name);
638 av_freep(&filter->input_pads);
639 av_freep(&filter->output_pads);
640 av_freep(&filter->inputs);
641 av_freep(&filter->outputs);
642 av_freep(&filter->priv);
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643 av_free(filter);
644}
645
a360f71e 646int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
4dbbcdee 647{
e079d22e 648 int ret=0;
4dbbcdee 649
ca857431 650 if (filter->filter->init)
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651 ret = filter->filter->init(filter, args, opaque);
652 return ret;
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653}
654