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1 4dbbcdee Vitor Sessak
/*
2 16790dc3 Vitor Sessak
 * filter layer
3 3fa77bde Stefano Sabatini
 * Copyright (c) 2007 Bobby Bingham
4 4dbbcdee Vitor Sessak
 *
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 96da1c51 Stefano Sabatini
/* #define DEBUG */
23
24 b4b66456 Stefano Sabatini
#include "libavutil/pixdesc.h"
25 867ae7aa Stefano Sabatini
#include "libavutil/rational.h"
26 b1779800 Stefano Sabatini
#include "libavcore/audioconvert.h"
27 81c1ecab Stefano Sabatini
#include "libavcore/imgutils.h"
28 4dbbcdee Vitor Sessak
#include "avfilter.h"
29 9f0e31d2 Stefano Sabatini
#include "internal.h"
30 4dbbcdee Vitor Sessak
31 540f1c7b Stefano Sabatini
unsigned avfilter_version(void) {
32
    return LIBAVFILTER_VERSION_INT;
33
}
34
35 41600690 Stefano Sabatini
const char *avfilter_configuration(void)
36 c1736936 Diego Biurrun
{
37
    return FFMPEG_CONFIGURATION;
38
}
39
40 41600690 Stefano Sabatini
const char *avfilter_license(void)
41 c1736936 Diego Biurrun
{
42
#define LICENSE_PREFIX "libavfilter license: "
43
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
44
}
45
46 7fce481a S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
47 4dbbcdee Vitor Sessak
{
48 ecc8dada S.N. Hemanth Meenakshisundaram
    AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
49 4f9ce3c4 Stefano Sabatini
    if (!ret)
50
        return NULL;
51 cdf2a332 Vitor Sessak
    *ret = *ref;
52 cc80caff S.N. Hemanth Meenakshisundaram
    if (ref->type == AVMEDIA_TYPE_VIDEO) {
53
        ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
54 4f9ce3c4 Stefano Sabatini
        if (!ret->video) {
55
            av_free(ret);
56
            return NULL;
57
        }
58 cc80caff S.N. Hemanth Meenakshisundaram
        *ret->video = *ref->video;
59 ad2c9501 S.N. Hemanth Meenakshisundaram
    } 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;
66 cc80caff S.N. Hemanth Meenakshisundaram
    }
67 efb36bfc Vitor Sessak
    ret->perms &= pmask;
68 7fce481a S.N. Hemanth Meenakshisundaram
    ret->buf->refcount ++;
69 4dbbcdee Vitor Sessak
    return ret;
70
}
71
72 7fce481a S.N. Hemanth Meenakshisundaram
void avfilter_unref_buffer(AVFilterBufferRef *ref)
73 4dbbcdee Vitor Sessak
{
74 6baf4afa Stefano Sabatini
    if (!ref)
75
        return;
76 ca857431 Stefano Sabatini
    if (!(--ref->buf->refcount))
77 7fce481a S.N. Hemanth Meenakshisundaram
        ref->buf->free(ref->buf);
78 cc80caff S.N. Hemanth Meenakshisundaram
    av_free(ref->video);
79 ad2c9501 S.N. Hemanth Meenakshisundaram
    av_free(ref->audio);
80 4dbbcdee Vitor Sessak
    av_free(ref);
81
}
82
83 24618441 Vitor Sessak
void 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
98 ca857431 Stefano Sabatini
    (*count)++;
99
    for (i = idx+1; i < *count; i++)
100
        if (*links[i])
101
            (*(unsigned *)((uint8_t *) *links[i] + padidx_off))++;
102 24618441 Vitor Sessak
}
103
104 4dbbcdee Vitor Sessak
int avfilter_link(AVFilterContext *src, unsigned srcpad,
105
                  AVFilterContext *dst, unsigned dstpad)
106
{
107
    AVFilterLink *link;
108
109 ca857431 Stefano Sabatini
    if (src->output_count <= srcpad || dst->input_count <= dstpad ||
110
        src->outputs[srcpad]        || dst->inputs[dstpad])
111 4dbbcdee Vitor Sessak
        return -1;
112
113 891aeeee Stefano Sabatini
    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
120 4dbbcdee Vitor Sessak
    src->outputs[srcpad] =
121 b3431ecd Vitor Sessak
    dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
122 4dbbcdee Vitor Sessak
123 1653c11f Vitor Sessak
    link->src     = src;
124
    link->dst     = dst;
125 acc0490f Stefano Sabatini
    link->srcpad  = &src->output_pads[srcpad];
126
    link->dstpad  = &dst->input_pads[dstpad];
127 bdab614b S.N. Hemanth Meenakshisundaram
    link->type    = src->output_pads[srcpad].type;
128 5d6e4c16 Stefano Sabatini
    assert(PIX_FMT_NONE == -1 && AV_SAMPLE_FMT_NONE == -1);
129 bdab614b S.N. Hemanth Meenakshisundaram
    link->format  = -1;
130 01942f1d Vitor Sessak
131
    return 0;
132
}
133
134 52362e9d Vitor Sessak
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
135 486adc55 Stefano Sabatini
                           unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
136 52362e9d Vitor Sessak
{
137 db9dfa3c Stefano Sabatini
    int ret;
138 acc0490f Stefano Sabatini
    unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
139
140 08f8b51f Stefano Sabatini
    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);
143 52362e9d Vitor Sessak
144 acc0490f Stefano Sabatini
    link->dst->inputs[dstpad_idx] = NULL;
145 486adc55 Stefano Sabatini
    if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
146 52362e9d Vitor Sessak
        /* failed to link output filter to new filter */
147 acc0490f Stefano Sabatini
        link->dst->inputs[dstpad_idx] = link;
148 db9dfa3c Stefano Sabatini
        return ret;
149 52362e9d Vitor Sessak
    }
150
151
    /* re-hookup the link to the new destination filter we inserted */
152
    link->dst = filt;
153 486adc55 Stefano Sabatini
    link->dstpad = &filt->input_pads[filt_srcpad_idx];
154
    filt->inputs[filt_srcpad_idx] = link;
155 52362e9d Vitor Sessak
156 bdab614b S.N. Hemanth Meenakshisundaram
    /* if any information on supported media formats already exists on the
157 07d0bba5 Vitor Sessak
     * link, we need to preserve that */
158 ca857431 Stefano Sabatini
    if (link->out_formats)
159 e3065c8b Vitor Sessak
        avfilter_formats_changeref(&link->out_formats,
160 486adc55 Stefano Sabatini
                                   &filt->outputs[filt_dstpad_idx]->out_formats);
161 07d0bba5 Vitor Sessak
162 52362e9d Vitor Sessak
    return 0;
163
}
164
165 69818105 Vitor Sessak
int avfilter_config_links(AVFilterContext *filter)
166 01942f1d Vitor Sessak
{
167
    int (*config_link)(AVFilterLink *);
168 69818105 Vitor Sessak
    unsigned i;
169 69f73a89 Stefano Sabatini
    int ret;
170 69818105 Vitor Sessak
171 ca857431 Stefano Sabatini
    for (i = 0; i < filter->input_count; i ++) {
172 e079d22e Vitor Sessak
        AVFilterLink *link = filter->inputs[i];
173 d21cbbff Vitor Sessak
174 ca857431 Stefano Sabatini
        if (!link) continue;
175 69818105 Vitor Sessak
176 ca857431 Stefano Sabatini
        switch (link->init_state) {
177 69818105 Vitor Sessak
        case AVLINK_INIT:
178
            continue;
179
        case AVLINK_STARTINIT:
180 7a9fd2a0 Vitor Sessak
            av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
181
            return 0;
182 69818105 Vitor Sessak
        case AVLINK_UNINIT:
183
            link->init_state = AVLINK_STARTINIT;
184
185 69f73a89 Stefano Sabatini
            if ((ret = avfilter_config_links(link->src)) < 0)
186
                return ret;
187 4dbbcdee Vitor Sessak
188 acc0490f Stefano Sabatini
            if (!(config_link = link->srcpad->config_props))
189 2fd46877 Vitor Sessak
                config_link  = avfilter_default_config_output_link;
190 69f73a89 Stefano Sabatini
            if ((ret = config_link(link)) < 0)
191
                return ret;
192 102fb0e3 Vitor Sessak
193 867ae7aa Stefano Sabatini
            if (link->time_base.num == 0 && link->time_base.den == 0)
194 cf5fe8ec Stefano Sabatini
                link->time_base = link->src && link->src->input_count ?
195
                    link->src->inputs[0]->time_base : AV_TIME_BASE_Q;
196 867ae7aa Stefano Sabatini
197 acc0490f Stefano Sabatini
            if ((config_link = link->dstpad->config_props))
198 69f73a89 Stefano Sabatini
                if ((ret = config_link(link)) < 0)
199
                    return ret;
200 102fb0e3 Vitor Sessak
201 69818105 Vitor Sessak
            link->init_state = AVLINK_INIT;
202
        }
203
    }
204
205 4dbbcdee Vitor Sessak
    return 0;
206
}
207
208 eb7ccf8f Diego Elio Pettenò
static char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
209 eedca998 Stefano Sabatini
{
210 0ccabeea Michael Niedermayer
    snprintf(buf, buf_size, "%s%s%s%s%s%s",
211 eedca998 Stefano Sabatini
             perms & AV_PERM_READ      ? "r" : "",
212
             perms & AV_PERM_WRITE     ? "w" : "",
213
             perms & AV_PERM_PRESERVE  ? "p" : "",
214 906eaab4 Stefano Sabatini
             perms & AV_PERM_REUSE     ? "u" : "",
215 0ccabeea Michael Niedermayer
             perms & AV_PERM_REUSE2    ? "U" : "",
216
             perms & AV_PERM_NEG_LINESIZES ? "n" : "");
217 eedca998 Stefano Sabatini
    return buf;
218
}
219
220 dfd2a005 Luca Barbato
static void ff_dlog_ref(void *ctx, AVFilterBufferRef *ref, int end)
221 96da1c51 Stefano Sabatini
{
222 eedca998 Stefano Sabatini
    av_unused char buf[16];
223 dfd2a005 Luca Barbato
    av_dlog(ctx,
224 eedca998 Stefano Sabatini
            "ref[%p buf:%p refcount:%d perms:%s data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
225
            ref, ref->buf, ref->buf->refcount, ff_get_ref_perms_string(buf, sizeof(buf), ref->perms), ref->data[0],
226 b5fbb31e Stefano Sabatini
            ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
227
            ref->pts, ref->pos);
228 382ecd35 Stefano Sabatini
229 b5fbb31e Stefano Sabatini
    if (ref->video) {
230 dfd2a005 Luca Barbato
        av_dlog(ctx, " a:%d/%d s:%dx%d i:%c",
231 b5fbb31e Stefano Sabatini
                ref->video->pixel_aspect.num, ref->video->pixel_aspect.den,
232
                ref->video->w, ref->video->h,
233
                !ref->video->interlaced     ? 'P' :         /* Progressive  */
234
                ref->video->top_field_first ? 'T' : 'B');   /* Top / Bottom */
235 382ecd35 Stefano Sabatini
    }
236 014df3a2 Stefano Sabatini
    if (ref->audio) {
237 dfd2a005 Luca Barbato
        av_dlog(ctx, " cl:%"PRId64"d sn:%d s:%d sr:%d p:%d",
238 014df3a2 Stefano Sabatini
                ref->audio->channel_layout,
239 a242ac36 Stefano Sabatini
                ref->audio->nb_samples,
240 014df3a2 Stefano Sabatini
                ref->audio->size,
241
                ref->audio->sample_rate,
242
                ref->audio->planar);
243
    }
244
245 dfd2a005 Luca Barbato
    av_dlog(ctx, "]%s", end ? "\n" : "");
246 96da1c51 Stefano Sabatini
}
247
248 dfd2a005 Luca Barbato
static void ff_dlog_link(void *ctx, AVFilterLink *link, int end)
249 96da1c51 Stefano Sabatini
{
250 7986e34d Stefano Sabatini
    if (link->type == AVMEDIA_TYPE_VIDEO) {
251 dfd2a005 Luca Barbato
        av_dlog(ctx,
252 1d5b1885 Stefano Sabatini
                "link[%p s:%dx%d fmt:%-16s %-16s->%-16s]%s",
253
                link, link->w, link->h,
254
                av_pix_fmt_descriptors[link->format].name,
255
                link->src ? link->src->filter->name : "",
256
                link->dst ? link->dst->filter->name : "",
257
                end ? "\n" : "");
258 7986e34d Stefano Sabatini
    } else {
259
        char buf[128];
260
        av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
261
262 dfd2a005 Luca Barbato
        av_dlog(ctx,
263 7986e34d Stefano Sabatini
                "link[%p r:%"PRId64" cl:%s fmt:%-16s %-16s->%-16s]%s",
264
                link, link->sample_rate, buf,
265
                av_get_sample_fmt_name(link->format),
266
                link->src ? link->src->filter->name : "",
267
                link->dst ? link->dst->filter->name : "",
268
                end ? "\n" : "");
269
    }
270 96da1c51 Stefano Sabatini
}
271
272 dfd2a005 Luca Barbato
#define FF_DPRINTF_START(ctx, func) av_dlog(NULL, "%-16s: ", #func)
273 eb7ccf8f Diego Elio Pettenò
274 ecc8dada S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
275 4dbbcdee Vitor Sessak
{
276 ecc8dada S.N. Hemanth Meenakshisundaram
    AVFilterBufferRef *ret = NULL;
277 4dbbcdee Vitor Sessak
278 eedca998 Stefano Sabatini
    av_unused char buf[16];
279 dfd2a005 Luca Barbato
    FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
280
    av_dlog(NULL, " perms:%s w:%d h:%d\n", ff_get_ref_perms_string(buf, sizeof(buf), perms), w, h);
281 96da1c51 Stefano Sabatini
282 acc0490f Stefano Sabatini
    if (link->dstpad->get_video_buffer)
283
        ret = link->dstpad->get_video_buffer(link, perms, w, h);
284 0eb4ff9e Stefano Sabatini
285 ca857431 Stefano Sabatini
    if (!ret)
286 0eb4ff9e Stefano Sabatini
        ret = avfilter_default_get_video_buffer(link, perms, w, h);
287 4dbbcdee Vitor Sessak
288 382ac60e S.N. Hemanth Meenakshisundaram
    if (ret)
289
        ret->type = AVMEDIA_TYPE_VIDEO;
290
291 dfd2a005 Luca Barbato
    FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " returning "); ff_dlog_ref(NULL, ret, 1);
292 96da1c51 Stefano Sabatini
293 4dbbcdee Vitor Sessak
    return ret;
294
}
295
296 d38c340f Stefano Sabatini
AVFilterBufferRef *
297
avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
298
                                          int w, int h, enum PixelFormat format)
299
{
300
    AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
301
    AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
302
303
    if (!pic || !picref)
304
        goto fail;
305
306
    picref->buf = pic;
307
    picref->buf->free = ff_avfilter_default_free_buffer;
308
    if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
309
        goto fail;
310
311 36dc00de Michael Niedermayer
    pic->w = picref->video->w = w;
312
    pic->h = picref->video->h = h;
313 d38c340f Stefano Sabatini
314
    /* make sure the buffer gets read permission or it's useless for output */
315
    picref->perms = perms | AV_PERM_READ;
316
317
    pic->refcount = 1;
318
    picref->type = AVMEDIA_TYPE_VIDEO;
319 36dc00de Michael Niedermayer
    pic->format = picref->format = format;
320 d38c340f Stefano Sabatini
321
    memcpy(pic->data,        data,          sizeof(pic->data));
322
    memcpy(pic->linesize,    linesize,      sizeof(pic->linesize));
323
    memcpy(picref->data,     pic->data,     sizeof(picref->data));
324
    memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
325
326
    return picref;
327
328
fail:
329
    if (picref && picref->video)
330
        av_free(picref->video);
331
    av_free(picref);
332
    av_free(pic);
333
    return NULL;
334
}
335
336 ad2c9501 S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_get_audio_buffer(AVFilterLink *link, int perms,
337 5d6e4c16 Stefano Sabatini
                                             enum AVSampleFormat sample_fmt, int size,
338 ad2c9501 S.N. Hemanth Meenakshisundaram
                                             int64_t channel_layout, int planar)
339
{
340
    AVFilterBufferRef *ret = NULL;
341
342 acc0490f Stefano Sabatini
    if (link->dstpad->get_audio_buffer)
343
        ret = link->dstpad->get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
344 ad2c9501 S.N. Hemanth Meenakshisundaram
345
    if (!ret)
346
        ret = avfilter_default_get_audio_buffer(link, perms, sample_fmt, size, channel_layout, planar);
347
348
    if (ret)
349
        ret->type = AVMEDIA_TYPE_AUDIO;
350
351
    return ret;
352
}
353
354 3306f8bd Vitor Sessak
int avfilter_request_frame(AVFilterLink *link)
355 4dbbcdee Vitor Sessak
{
356 dfd2a005 Luca Barbato
    FF_DPRINTF_START(NULL, request_frame); ff_dlog_link(NULL, link, 1);
357 96da1c51 Stefano Sabatini
358 acc0490f Stefano Sabatini
    if (link->srcpad->request_frame)
359
        return link->srcpad->request_frame(link);
360 ca857431 Stefano Sabatini
    else if (link->src->inputs[0])
361 3306f8bd Vitor Sessak
        return avfilter_request_frame(link->src->inputs[0]);
362
    else return -1;
363 4dbbcdee Vitor Sessak
}
364
365 7b02c484 Vitor Sessak
int avfilter_poll_frame(AVFilterLink *link)
366
{
367 ca857431 Stefano Sabatini
    int i, min = INT_MAX;
368 7b02c484 Vitor Sessak
369 acc0490f Stefano Sabatini
    if (link->srcpad->poll_frame)
370
        return link->srcpad->poll_frame(link);
371 c245ddf2 Vitor Sessak
372 ca857431 Stefano Sabatini
    for (i = 0; i < link->src->input_count; i++) {
373 9dd08b4e Vitor Sessak
        int val;
374 ca857431 Stefano Sabatini
        if (!link->src->inputs[i])
375 c245ddf2 Vitor Sessak
            return -1;
376 9dd08b4e Vitor Sessak
        val = avfilter_poll_frame(link->src->inputs[i]);
377
        min = FFMIN(min, val);
378 c245ddf2 Vitor Sessak
    }
379 7b02c484 Vitor Sessak
380
    return min;
381
}
382
383 4dbbcdee Vitor Sessak
/* XXX: should we do the duplicating of the picture ref here, instead of
384
 * forcing the source filter to do it? */
385 ecc8dada S.N. Hemanth Meenakshisundaram
void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
386 4dbbcdee Vitor Sessak
{
387 ecc8dada S.N. Hemanth Meenakshisundaram
    void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
388 acc0490f Stefano Sabatini
    AVFilterPad *dst = link->dstpad;
389 0ccabeea Michael Niedermayer
    int perms = picref->perms;
390 4dbbcdee Vitor Sessak
391 dfd2a005 Luca Barbato
    FF_DPRINTF_START(NULL, start_frame); ff_dlog_link(NULL, link, 0); av_dlog(NULL, " "); ff_dlog_ref(NULL, picref, 1);
392 96da1c51 Stefano Sabatini
393 ca857431 Stefano Sabatini
    if (!(start_frame = dst->start_frame))
394 4dbbcdee Vitor Sessak
        start_frame = avfilter_default_start_frame;
395
396 0ccabeea Michael Niedermayer
    if (picref->linesize[0] < 0)
397
        perms |= AV_PERM_NEG_LINESIZES;
398 c949d867 Vitor Sessak
    /* prepare to copy the picture if it has insufficient permissions */
399 0ccabeea Michael Niedermayer
    if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
400 dc46661a Stefano Sabatini
        av_log(link->dst, AV_LOG_DEBUG,
401 c949d867 Vitor Sessak
                "frame copy needed (have perms %x, need %x, reject %x)\n",
402 269b9847 Vitor Sessak
                picref->perms,
403 acc0490f Stefano Sabatini
                link->dstpad->min_perms, link->dstpad->rej_perms);
404 c949d867 Vitor Sessak
405 5a9dd3de Stefano Sabatini
        link->cur_buf = avfilter_get_video_buffer(link, dst->min_perms, link->w, link->h);
406 5d4890d7 S.N. Hemanth Meenakshisundaram
        link->src_buf = picref;
407
        avfilter_copy_buffer_ref_props(link->cur_buf, link->src_buf);
408 c949d867 Vitor Sessak
    }
409
    else
410 5d4890d7 S.N. Hemanth Meenakshisundaram
        link->cur_buf = picref;
411 c949d867 Vitor Sessak
412 5d4890d7 S.N. Hemanth Meenakshisundaram
    start_frame(link, link->cur_buf);
413 4dbbcdee Vitor Sessak
}
414
415
void avfilter_end_frame(AVFilterLink *link)
416
{
417
    void (*end_frame)(AVFilterLink *);
418
419 acc0490f Stefano Sabatini
    if (!(end_frame = link->dstpad->end_frame))
420 35db407e Vitor Sessak
        end_frame = avfilter_default_end_frame;
421
422
    end_frame(link);
423
424 c949d867 Vitor Sessak
    /* unreference the source picture if we're feeding the destination filter
425
     * a copied version dues to permission issues */
426 ca857431 Stefano Sabatini
    if (link->src_buf) {
427 5d4890d7 S.N. Hemanth Meenakshisundaram
        avfilter_unref_buffer(link->src_buf);
428
        link->src_buf = NULL;
429 c949d867 Vitor Sessak
    }
430 4dbbcdee Vitor Sessak
}
431
432 a13a5437 Stefano Sabatini
void avfilter_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
433 4dbbcdee Vitor Sessak
{
434 c949d867 Vitor Sessak
    uint8_t *src[4], *dst[4];
435 2bb96256 Bobby Bingham
    int i, j, vsub;
436 a13a5437 Stefano Sabatini
    void (*draw_slice)(AVFilterLink *, int, int, int);
437 c949d867 Vitor Sessak
438 dfd2a005 Luca Barbato
    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);
439 96da1c51 Stefano Sabatini
440 c949d867 Vitor Sessak
    /* copy the slice if needed for permission reasons */
441 ca857431 Stefano Sabatini
    if (link->src_buf) {
442 b4b66456 Stefano Sabatini
        vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
443 c949d867 Vitor Sessak
444 ca857431 Stefano Sabatini
        for (i = 0; i < 4; i++) {
445
            if (link->src_buf->data[i]) {
446 5d4890d7 S.N. Hemanth Meenakshisundaram
                src[i] = link->src_buf-> data[i] +
447 fee0deb6 Stefano Sabatini
                    (y >> (i==1 || i==2 ? vsub : 0)) * link->src_buf-> linesize[i];
448 5d4890d7 S.N. Hemanth Meenakshisundaram
                dst[i] = link->cur_buf->data[i] +
449 fee0deb6 Stefano Sabatini
                    (y >> (i==1 || i==2 ? vsub : 0)) * link->cur_buf->linesize[i];
450 c949d867 Vitor Sessak
            } else
451
                src[i] = dst[i] = NULL;
452
        }
453 19dc7104 Vitor Sessak
454 ca857431 Stefano Sabatini
        for (i = 0; i < 4; i++) {
455 805d0232 Vitor Sessak
            int planew =
456 e16f217c Stefano Sabatini
                av_image_get_linesize(link->format, link->cur_buf->video->w, i);
457 805d0232 Vitor Sessak
458 ca857431 Stefano Sabatini
            if (!src[i]) continue;
459 c949d867 Vitor Sessak
460 fee0deb6 Stefano Sabatini
            for (j = 0; j < h >> (i==1 || i==2 ? vsub : 0); j++) {
461 805d0232 Vitor Sessak
                memcpy(dst[i], src[i], planew);
462 ca857431 Stefano Sabatini
                src[i] += link->src_buf->linesize[i];
463 5d4890d7 S.N. Hemanth Meenakshisundaram
                dst[i] += link->cur_buf->linesize[i];
464 c949d867 Vitor Sessak
            }
465
        }
466
    }
467
468 acc0490f Stefano Sabatini
    if (!(draw_slice = link->dstpad->draw_slice))
469 b9609848 Stefano Sabatini
        draw_slice = avfilter_default_draw_slice;
470 a13a5437 Stefano Sabatini
    draw_slice(link, y, h, slice_dir);
471 4dbbcdee Vitor Sessak
}
472
473 ad2c9501 S.N. Hemanth Meenakshisundaram
void avfilter_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
474
{
475
    void (*filter_samples)(AVFilterLink *, AVFilterBufferRef *);
476 acc0490f Stefano Sabatini
    AVFilterPad *dst = link->dstpad;
477 ad2c9501 S.N. Hemanth Meenakshisundaram
478
    if (!(filter_samples = dst->filter_samples))
479
        filter_samples = avfilter_default_filter_samples;
480
481
    /* prepare to copy the samples if the buffer has insufficient permissions */
482
    if ((dst->min_perms & samplesref->perms) != dst->min_perms ||
483
        dst->rej_perms & samplesref->perms) {
484
485
        av_log(link->dst, AV_LOG_DEBUG,
486
               "Copying audio data in avfilter (have perms %x, need %x, reject %x)\n",
487 acc0490f Stefano Sabatini
               samplesref->perms, link->dstpad->min_perms, link->dstpad->rej_perms);
488 ad2c9501 S.N. Hemanth Meenakshisundaram
489
        link->cur_buf = avfilter_default_get_audio_buffer(link, dst->min_perms,
490
                                                          samplesref->format,
491
                                                          samplesref->audio->size,
492
                                                          samplesref->audio->channel_layout,
493
                                                          samplesref->audio->planar);
494
        link->cur_buf->pts                = samplesref->pts;
495
        link->cur_buf->audio->sample_rate = samplesref->audio->sample_rate;
496
497
        /* Copy actual data into new samples buffer */
498
        memcpy(link->cur_buf->data[0], samplesref->data[0], samplesref->audio->size);
499
500
        avfilter_unref_buffer(samplesref);
501
    } else
502
        link->cur_buf = samplesref;
503
504
    filter_samples(link, link->cur_buf);
505
}
506
507 86a60fa1 Stefano Sabatini
#define MAX_REGISTERED_AVFILTERS_NB 64
508
509
static AVFilter *registered_avfilters[MAX_REGISTERED_AVFILTERS_NB + 1];
510
511
static int next_registered_avfilter_idx = 0;
512 3555d2e8 Stefano Sabatini
513 05decb00 Vitor Sessak
AVFilter *avfilter_get_by_name(const char *name)
514 4dbbcdee Vitor Sessak
{
515 86a60fa1 Stefano Sabatini
    int i;
516 6d8c67a7 Vitor Sessak
517 86a60fa1 Stefano Sabatini
    for (i = 0; registered_avfilters[i]; i++)
518
        if (!strcmp(registered_avfilters[i]->name, name))
519
            return registered_avfilters[i];
520 4dbbcdee Vitor Sessak
521
    return NULL;
522
}
523
524 86a60fa1 Stefano Sabatini
int avfilter_register(AVFilter *filter)
525 4dbbcdee Vitor Sessak
{
526 86a60fa1 Stefano Sabatini
    if (next_registered_avfilter_idx == MAX_REGISTERED_AVFILTERS_NB)
527
        return -1;
528 6d8c67a7 Vitor Sessak
529 86a60fa1 Stefano Sabatini
    registered_avfilters[next_registered_avfilter_idx++] = filter;
530
    return 0;
531 4dbbcdee Vitor Sessak
}
532
533 1433c4ab Stefano Sabatini
AVFilter **av_filter_next(AVFilter **filter)
534
{
535
    return filter ? ++filter : &registered_avfilters[0];
536
}
537
538 4dbbcdee Vitor Sessak
void avfilter_uninit(void)
539
{
540 86a60fa1 Stefano Sabatini
    memset(registered_avfilters, 0, sizeof(registered_avfilters));
541
    next_registered_avfilter_idx = 0;
542 4dbbcdee Vitor Sessak
}
543
544
static int pad_count(const AVFilterPad *pads)
545
{
546
    int count;
547
548 05decb00 Vitor Sessak
    for(count = 0; pads->name; count ++) pads ++;
549 4dbbcdee Vitor Sessak
    return count;
550
}
551
552
static const char *filter_name(void *p)
553
{
554
    AVFilterContext *filter = p;
555
    return filter->filter->name;
556
}
557
558 b049ad50 Måns Rullgård
static const AVClass avfilter_class = {
559
    "AVFilter",
560 2308b6c1 Michael Niedermayer
    filter_name,
561
    NULL,
562
    LIBAVUTIL_VERSION_INT,
563 b049ad50 Måns Rullgård
};
564
565 84c03869 Stefano Sabatini
int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
566 4dbbcdee Vitor Sessak
{
567 8f618f4c Vitor Sessak
    AVFilterContext *ret;
568 84c03869 Stefano Sabatini
    *filter_ctx = NULL;
569 8f618f4c Vitor Sessak
570
    if (!filter)
571 84c03869 Stefano Sabatini
        return AVERROR(EINVAL);
572 8f618f4c Vitor Sessak
573 689a5f49 Stefano Sabatini
    ret = av_mallocz(sizeof(AVFilterContext));
574 4dbbcdee Vitor Sessak
575 b049ad50 Måns Rullgård
    ret->av_class = &avfilter_class;
576 4dbbcdee Vitor Sessak
    ret->filter   = filter;
577 2350e69c Vitor Sessak
    ret->name     = inst_name ? av_strdup(inst_name) : NULL;
578 4dbbcdee Vitor Sessak
    ret->priv     = av_mallocz(filter->priv_size);
579
580 7d0e1392 Vitor Sessak
    ret->input_count  = pad_count(filter->inputs);
581 689a5f49 Stefano Sabatini
    if (ret->input_count) {
582 90993b38 Stefano Sabatini
        ret->input_pads   = av_malloc(sizeof(AVFilterPad) * ret->input_count);
583
        memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->input_count);
584
        ret->inputs       = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
585 689a5f49 Stefano Sabatini
    }
586 c5ef7d7b Vitor Sessak
587 7d0e1392 Vitor Sessak
    ret->output_count = pad_count(filter->outputs);
588 689a5f49 Stefano Sabatini
    if (ret->output_count) {
589 90993b38 Stefano Sabatini
        ret->output_pads  = av_malloc(sizeof(AVFilterPad) * ret->output_count);
590
        memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->output_count);
591
        ret->outputs      = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
592 689a5f49 Stefano Sabatini
    }
593 7d0e1392 Vitor Sessak
594 84c03869 Stefano Sabatini
    *filter_ctx = ret;
595
    return 0;
596 4dbbcdee Vitor Sessak
}
597
598 24de0edb Stefano Sabatini
void avfilter_free(AVFilterContext *filter)
599 4dbbcdee Vitor Sessak
{
600
    int i;
601 b1a05b82 Stefano Sabatini
    AVFilterLink *link;
602 4dbbcdee Vitor Sessak
603 ca857431 Stefano Sabatini
    if (filter->filter->uninit)
604 4dbbcdee Vitor Sessak
        filter->filter->uninit(filter);
605
606 ca857431 Stefano Sabatini
    for (i = 0; i < filter->input_count; i++) {
607 b1a05b82 Stefano Sabatini
        if ((link = filter->inputs[i])) {
608
            if (link->src)
609 acc0490f Stefano Sabatini
                link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
610 b1a05b82 Stefano Sabatini
            avfilter_formats_unref(&link->in_formats);
611
            avfilter_formats_unref(&link->out_formats);
612 f3b90d25 Måns Rullgård
        }
613 b1a05b82 Stefano Sabatini
        av_freep(&link);
614 4dbbcdee Vitor Sessak
    }
615 ca857431 Stefano Sabatini
    for (i = 0; i < filter->output_count; i++) {
616 b1a05b82 Stefano Sabatini
        if ((link = filter->outputs[i])) {
617
            if (link->dst)
618 acc0490f Stefano Sabatini
                link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
619 b1a05b82 Stefano Sabatini
            avfilter_formats_unref(&link->in_formats);
620
            avfilter_formats_unref(&link->out_formats);
621 f3b90d25 Måns Rullgård
        }
622 b1a05b82 Stefano Sabatini
        av_freep(&link);
623 4dbbcdee Vitor Sessak
    }
624
625 f4cb4462 Vitor Sessak
    av_freep(&filter->name);
626
    av_freep(&filter->input_pads);
627
    av_freep(&filter->output_pads);
628
    av_freep(&filter->inputs);
629
    av_freep(&filter->outputs);
630
    av_freep(&filter->priv);
631 4dbbcdee Vitor Sessak
    av_free(filter);
632
}
633
634 a360f71e Vitor Sessak
int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
635 4dbbcdee Vitor Sessak
{
636 e079d22e Vitor Sessak
    int ret=0;
637 4dbbcdee Vitor Sessak
638 ca857431 Stefano Sabatini
    if (filter->filter->init)
639 e079d22e Vitor Sessak
        ret = filter->filter->init(filter, args, opaque);
640
    return ret;
641 4dbbcdee Vitor Sessak
}