Statistics
| Branch: | Revision:

ffmpeg / libavfilter / avfilter.c @ 7b02c484

History | View | Annotate | Download (12.1 KB)

1 4dbbcdee Vitor Sessak
/*
2
 * Filter layer
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
22 e0752603 Vitor Sessak
#include <stdarg.h>
23 4dbbcdee Vitor Sessak
#include <stdlib.h>
24
#include <string.h>
25
#include <stdio.h>
26
27
#include "avfilter.h"
28 d72a138e Vitor Sessak
#include "allfilters.h"
29 4dbbcdee Vitor Sessak
30 6d8c67a7 Vitor Sessak
/** list of registered filters */
31
struct FilterList
32
{
33
    AVFilter *filter;
34
    struct FilterList *next;
35
} *filters = NULL;
36 4dbbcdee Vitor Sessak
37 6fb0648d Vitor Sessak
/** 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]
40
41 269b9847 Vitor Sessak
AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
42 4dbbcdee Vitor Sessak
{
43
    AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
44 cdf2a332 Vitor Sessak
    *ret = *ref;
45 efb36bfc Vitor Sessak
    ret->perms &= pmask;
46 4dbbcdee Vitor Sessak
    ret->pic->refcount ++;
47
    return ret;
48
}
49
50
void avfilter_unref_pic(AVFilterPicRef *ref)
51
{
52 269b9847 Vitor Sessak
    if(-- ref->pic->refcount == 0)
53 4dbbcdee Vitor Sessak
        ref->pic->free(ref->pic);
54
    av_free(ref);
55
}
56
57 24618441 Vitor Sessak
void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
58
                         AVFilterPad **pads, AVFilterLink ***links,
59
                         AVFilterPad *newpad)
60
{
61
    unsigned i;
62
63
    idx = FFMIN(idx, *count);
64
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));
70
    (*links)[idx] = NULL;
71
72
    (*count) ++;
73
    for(i = idx+1; i < *count; i ++)
74
        if(*links[i])
75
            (*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
76
}
77
78 4dbbcdee Vitor Sessak
int avfilter_link(AVFilterContext *src, unsigned srcpad,
79
                  AVFilterContext *dst, unsigned dstpad)
80
{
81
    AVFilterLink *link;
82
83 7d0e1392 Vitor Sessak
    if(src->output_count <= srcpad || dst->input_count <= dstpad ||
84
       src->outputs[srcpad]        || dst->inputs[dstpad])
85 4dbbcdee Vitor Sessak
        return -1;
86
87
    src->outputs[srcpad] =
88 c949d867 Vitor Sessak
    dst->inputs[dstpad]  = link = av_mallocz(sizeof(AVFilterLink));
89 4dbbcdee Vitor Sessak
90 1653c11f Vitor Sessak
    link->src     = src;
91
    link->dst     = dst;
92
    link->srcpad  = srcpad;
93
    link->dstpad  = dstpad;
94 01942f1d Vitor Sessak
    link->format  = -1;
95
96
    return 0;
97
}
98
99 52362e9d Vitor Sessak
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
100
                           unsigned in, unsigned out)
101
{
102 e3065c8b Vitor Sessak
    AVFilterFormats *formats;
103
104 52362e9d Vitor Sessak
    av_log(NULL, AV_LOG_INFO, "auto-inserting filter '%s'\n",
105
            filt->filter->name);
106
107
    link->dst->inputs[link->dstpad] = NULL;
108
    if(avfilter_link(filt, out, link->dst, link->dstpad)) {
109
        /* failed to link output filter to new filter */
110
        link->dst->inputs[link->dstpad] = link;
111
        return -1;
112
    }
113
114
    /* re-hookup the link to the new destination filter we inserted */
115
    link->dst = filt;
116
    link->dstpad = in;
117
    filt->inputs[in] = link;
118
119 07d0bba5 Vitor Sessak
    /* if any information on supported colorspaces already exists on the
120
     * link, we need to preserve that */
121 e3065c8b Vitor Sessak
    if((formats = link->out_formats))
122
        avfilter_formats_changeref(&link->out_formats,
123
                                   &filt->outputs[out]->out_formats);
124 07d0bba5 Vitor Sessak
125 52362e9d Vitor Sessak
    return 0;
126
}
127
128 69818105 Vitor Sessak
int avfilter_config_links(AVFilterContext *filter)
129 01942f1d Vitor Sessak
{
130
    int (*config_link)(AVFilterLink *);
131 69818105 Vitor Sessak
    unsigned i;
132
133
    for(i = 0; i < filter->input_count; i ++) {
134
        AVFilterLink *link;
135 d21cbbff Vitor Sessak
136 69818105 Vitor Sessak
        if(!(link = filter->inputs[i])) continue;
137
138
        switch(link->init_state) {
139
        case AVLINK_INIT:
140
            continue;
141
        case AVLINK_STARTINIT:
142
            av_log(filter, AV_LOG_ERROR, "circular filter chain detected\n");
143
            return -1;
144
        case AVLINK_UNINIT:
145
            link->init_state = AVLINK_STARTINIT;
146
147
            if(avfilter_config_links(link->src))
148
                return -1;
149 4dbbcdee Vitor Sessak
150 2fd46877 Vitor Sessak
            if(!(config_link = link_spad(link).config_props))
151
                config_link  = avfilter_default_config_output_link;
152
            if(config_link(link))
153
                return -1;
154 102fb0e3 Vitor Sessak
155 2fd46877 Vitor Sessak
            if((config_link = link_dpad(link).config_props))
156
            if(config_link(link))
157
                return -1;
158 102fb0e3 Vitor Sessak
159 69818105 Vitor Sessak
            link->init_state = AVLINK_INIT;
160
        }
161
    }
162
163 4dbbcdee Vitor Sessak
    return 0;
164
}
165
166
AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
167
{
168
    AVFilterPicRef *ret = NULL;
169
170 6fb0648d Vitor Sessak
    if(link_dpad(link).get_video_buffer)
171
        ret = link_dpad(link).get_video_buffer(link, perms);
172 4dbbcdee Vitor Sessak
173
    if(!ret)
174
        ret = avfilter_default_get_video_buffer(link, perms);
175
176
    return ret;
177
}
178
179 3306f8bd Vitor Sessak
int avfilter_request_frame(AVFilterLink *link)
180 4dbbcdee Vitor Sessak
{
181 6fb0648d Vitor Sessak
    if(link_spad(link).request_frame)
182
        return link_spad(link).request_frame(link);
183 9586ba3a Vitor Sessak
    else if(link->src->inputs[0])
184 3306f8bd Vitor Sessak
        return avfilter_request_frame(link->src->inputs[0]);
185
    else return -1;
186 4dbbcdee Vitor Sessak
}
187
188 7b02c484 Vitor Sessak
int avfilter_poll_frame(AVFilterLink *link)
189
{
190
    int i, min=INT_MAX;
191
192
    if(link_spad(link).poll_frame)
193
        return link_spad(link).poll_frame(link);
194
    else
195
        for (i=0; i<link->src->input_count; i++) {
196
            if(!link->src->inputs[i])
197
                return -1;
198
            min = FFMIN(min, avfilter_poll_frame(link->src->inputs[i]));
199
        }
200
201
    return min;
202
}
203
204 4dbbcdee Vitor Sessak
/* XXX: should we do the duplicating of the picture ref here, instead of
205
 * forcing the source filter to do it? */
206
void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
207
{
208
    void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
209
210 e675dccd Vitor Sessak
    if(!(start_frame = link_dpad(link).start_frame))
211 4dbbcdee Vitor Sessak
        start_frame = avfilter_default_start_frame;
212
213 c949d867 Vitor Sessak
    /* prepare to copy the picture if it has insufficient permissions */
214 269b9847 Vitor Sessak
    if((link_dpad(link).min_perms & picref->perms) != link_dpad(link).min_perms ||
215
        link_dpad(link).rej_perms & picref->perms) {
216 c949d867 Vitor Sessak
        av_log(link->dst, AV_LOG_INFO,
217
                "frame copy needed (have perms %x, need %x, reject %x)\n",
218 269b9847 Vitor Sessak
                picref->perms,
219 c949d867 Vitor Sessak
                link_dpad(link).min_perms, link_dpad(link).rej_perms);
220
221
        link->cur_pic = avfilter_default_get_video_buffer(link, link_dpad(link).min_perms);
222
        link->srcpic = picref;
223
    }
224
    else
225
        link->cur_pic = picref;
226
227
    start_frame(link, link->cur_pic);
228 4dbbcdee Vitor Sessak
}
229
230
void avfilter_end_frame(AVFilterLink *link)
231
{
232
    void (*end_frame)(AVFilterLink *);
233
234 c949d867 Vitor Sessak
    /* unreference the source picture if we're feeding the destination filter
235
     * a copied version dues to permission issues */
236
    if(link->srcpic) {
237
        avfilter_unref_pic(link->srcpic);
238
        link->srcpic = NULL;
239
    }
240
241 e675dccd Vitor Sessak
    if(!(end_frame = link_dpad(link).end_frame))
242 4dbbcdee Vitor Sessak
        end_frame = avfilter_default_end_frame;
243
244
    end_frame(link);
245
}
246
247 ef35d13a Vitor Sessak
void avfilter_draw_slice(AVFilterLink *link, int y, int h)
248 4dbbcdee Vitor Sessak
{
249 c949d867 Vitor Sessak
    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
        }
265
        for(j = 0; j < h; j ++) {
266
            memcpy(dst[0], src[0], link->cur_pic->linesize[0]);
267
            src[0] += link->srcpic ->linesize[0];
268
            dst[0] += link->cur_pic->linesize[0];
269
        }
270
        for(i = 1; i < 4; i ++) {
271
            if(!src[i]) continue;
272
273
            for(j = 0; j < h >> vsub; j ++) {
274
                memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
275
                src[i] += link->srcpic ->linesize[i];
276
                dst[i] += link->cur_pic->linesize[i];
277
            }
278
        }
279
    }
280
281 6fb0648d Vitor Sessak
    if(!link_dpad(link).draw_slice)
282 7d0e1392 Vitor Sessak
        return;
283
284 6fb0648d Vitor Sessak
    link_dpad(link).draw_slice(link, y, h);
285 4dbbcdee Vitor Sessak
}
286
287
AVFilter *avfilter_get_by_name(char *name)
288
{
289 6d8c67a7 Vitor Sessak
    struct FilterList *filt;
290
291
    for(filt = filters; filt; filt = filt->next)
292
        if(!strcmp(filt->filter->name, name))
293
            return filt->filter;
294 4dbbcdee Vitor Sessak
295
    return NULL;
296
}
297
298
void avfilter_register(AVFilter *filter)
299
{
300 6d8c67a7 Vitor Sessak
    struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
301
302
    newfilt->filter = filter;
303
    newfilt->next   = filters;
304
    filters         = newfilt;
305 4dbbcdee Vitor Sessak
}
306
307
void avfilter_init(void)
308
{
309 7bce27a3 Vitor Sessak
    avfilter_register(&avfilter_vf_crop);
310
    avfilter_register(&avfilter_vf_fifo);
311 e946c25a Vitor Sessak
    avfilter_register(&avfilter_vf_format);
312 7bce27a3 Vitor Sessak
    avfilter_register(&avfilter_vf_fps);
313
    avfilter_register(&avfilter_vf_graph);
314
    avfilter_register(&avfilter_vf_graphdesc);
315
    avfilter_register(&avfilter_vf_graphfile);
316 c35a0473 Vitor Sessak
    avfilter_register(&avfilter_vf_hflip);
317 f9033975 Vitor Sessak
    avfilter_register(&avfilter_vf_negate);
318 cc0bb5a1 Vitor Sessak
    avfilter_register(&avfilter_vf_noformat);
319 7bce27a3 Vitor Sessak
    avfilter_register(&avfilter_vf_overlay);
320 0970ec6a Vitor Sessak
    avfilter_register(&avfilter_vf_rotate);
321 2a553ef5 Vitor Sessak
    avfilter_register(&avfilter_vf_scale);
322 0970ec6a Vitor Sessak
    avfilter_register(&avfilter_vf_setpts);
323 7bce27a3 Vitor Sessak
    avfilter_register(&avfilter_vf_slicify);
324
    avfilter_register(&avfilter_vf_split);
325 be696990 Vitor Sessak
    avfilter_register(&avfilter_vf_transpose);
326 7bce27a3 Vitor Sessak
    avfilter_register(&avfilter_vf_vflip);
327 b62966c0 Vitor Sessak
#ifdef CONFIG_AVFILTER_LAVF
328
    avfilter_register(&avfilter_vsrc_movie);
329
#endif //CONFIG_AVFILTER_LAVF
330 4dbbcdee Vitor Sessak
}
331
332
void avfilter_uninit(void)
333
{
334 6d8c67a7 Vitor Sessak
    struct FilterList *tmp;
335
336
    for(; filters; filters = tmp) {
337
        tmp = filters->next;
338
        av_free(filters);
339
    }
340 4dbbcdee Vitor Sessak
}
341
342
static int pad_count(const AVFilterPad *pads)
343
{
344
    AVFilterPad *p = (AVFilterPad *) pads;
345
    int count;
346
347
    for(count = 0; p->name; count ++) p ++;
348
    return count;
349
}
350
351
static const char *filter_name(void *p)
352
{
353
    AVFilterContext *filter = p;
354
    return filter->filter->name;
355
}
356
357 44b73497 Vitor Sessak
AVFilterContext *avfilter_open(AVFilter *filter, char *inst_name)
358 4dbbcdee Vitor Sessak
{
359 8f618f4c Vitor Sessak
    AVFilterContext *ret;
360
361
    if (!filter)
362
        return 0;
363
364
    ret = av_malloc(sizeof(AVFilterContext));
365 4dbbcdee Vitor Sessak
366
    ret->av_class = av_mallocz(sizeof(AVClass));
367
    ret->av_class->item_name = filter_name;
368
    ret->filter   = filter;
369 2350e69c Vitor Sessak
    ret->name     = inst_name ? av_strdup(inst_name) : NULL;
370 4dbbcdee Vitor Sessak
    ret->priv     = av_mallocz(filter->priv_size);
371
372 7d0e1392 Vitor Sessak
    ret->input_count  = pad_count(filter->inputs);
373 c5ef7d7b Vitor Sessak
    ret->input_pads   = av_malloc(sizeof(AVFilterPad) * ret->input_count);
374
    memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
375 7d0e1392 Vitor Sessak
    ret->inputs       = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
376 c5ef7d7b Vitor Sessak
377 7d0e1392 Vitor Sessak
    ret->output_count = pad_count(filter->outputs);
378 c5ef7d7b Vitor Sessak
    ret->output_pads  = av_malloc(sizeof(AVFilterPad) * ret->output_count);
379
    memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
380 7d0e1392 Vitor Sessak
    ret->outputs      = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
381
382 4dbbcdee Vitor Sessak
    return ret;
383
}
384
385
void avfilter_destroy(AVFilterContext *filter)
386
{
387
    int i;
388
389
    if(filter->filter->uninit)
390
        filter->filter->uninit(filter);
391
392 c5ef7d7b Vitor Sessak
    for(i = 0; i < filter->input_count; i ++) {
393 4dbbcdee Vitor Sessak
        if(filter->inputs[i])
394
            filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
395 f4cb4462 Vitor Sessak
        av_freep(&filter->inputs[i]);
396 4dbbcdee Vitor Sessak
    }
397 c5ef7d7b Vitor Sessak
    for(i = 0; i < filter->output_count; i ++) {
398 4dbbcdee Vitor Sessak
        if(filter->outputs[i])
399
            filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
400 f4cb4462 Vitor Sessak
        av_freep(&filter->outputs[i]);
401 4dbbcdee Vitor Sessak
    }
402
403 f4cb4462 Vitor Sessak
    av_freep(&filter->name);
404
    av_freep(&filter->input_pads);
405
    av_freep(&filter->output_pads);
406
    av_freep(&filter->inputs);
407
    av_freep(&filter->outputs);
408
    av_freep(&filter->priv);
409
    av_freep(&filter->av_class);
410 4dbbcdee Vitor Sessak
    av_free(filter);
411
}
412
413 a360f71e Vitor Sessak
int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
414 4dbbcdee Vitor Sessak
{
415 c6b0aa68 Vitor Sessak
    int ret;
416 4dbbcdee Vitor Sessak
417
    if(filter->filter->init)
418 a360f71e Vitor Sessak
        if((ret = filter->filter->init(filter, args, opaque))) return ret;
419 4dbbcdee Vitor Sessak
    return 0;
420
}