Move default entry point implementations to their own file.
[libav.git] / libavfilter / avfilter.c
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1/*
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
e0752603 22#include <stdarg.h>
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23#include <stdlib.h>
24#include <string.h>
25#include <stdio.h>
26
27#include "avfilter.h"
d72a138e 28#include "allfilters.h"
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29
30/** list of registered filters, sorted by name */
31static int filter_count = 0;
32static AVFilter **filters = NULL;
33
efb36bfc 34AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
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35{
36 AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
37 memcpy(ret, ref, sizeof(AVFilterPicRef));
efb36bfc 38 ret->perms &= pmask;
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39 ret->pic->refcount ++;
40 return ret;
41}
42
43void avfilter_unref_pic(AVFilterPicRef *ref)
44{
45 if(-- ref->pic->refcount == 0)
46 ref->pic->free(ref->pic);
47 av_free(ref);
48}
49
50int avfilter_link(AVFilterContext *src, unsigned srcpad,
51 AVFilterContext *dst, unsigned dstpad)
52{
53 AVFilterLink *link;
e0752603 54 int *fmts[2], i, j;
4dbbcdee 55
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56 if(src->output_count <= srcpad || dst->input_count <= dstpad ||
57 src->outputs[srcpad] || dst->inputs[dstpad])
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58 return -1;
59
60 src->outputs[srcpad] =
61 dst->inputs[dstpad] = link = av_malloc(sizeof(AVFilterLink));
62
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63 link->src = src;
64 link->dst = dst;
65 link->srcpad = srcpad;
66 link->dstpad = dstpad;
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67 link->cur_pic = NULL;
68
e0752603 69 /* find a format both filters support - TODO: auto-insert conversion filter */
998a7aa3 70 link->format = -1;
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71 if(src->output_pads[srcpad].query_formats)
72 fmts[0] = src->output_pads[srcpad].query_formats(link);
102fb0e3 73 else
78b0c0bb 74 fmts[0] = avfilter_default_query_output_formats(link);
c5ef7d7b 75 fmts[1] = dst->input_pads[dstpad].query_formats(link);
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76 for(i = 0; fmts[0][i] != -1; i ++)
77 for(j = 0; fmts[1][j] != -1; j ++)
78 if(fmts[0][i] == fmts[1][j]) {
79 link->format = fmts[0][i];
80 goto format_done;
81 }
82
83format_done:
84 av_free(fmts[0]);
85 av_free(fmts[1]);
86 if(link->format == -1) {
87 /* failed to find a format. fail at creating the link */
88 av_free(link);
89 src->outputs[srcpad] = NULL;
90 dst->inputs[dstpad] = NULL;
91 return -1;
92 }
93
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94 if (src->output_pads[srcpad].config_props)
95 src->output_pads[srcpad].config_props(link);
102fb0e3 96 else
78b0c0bb 97 avfilter_default_config_output_link(link);
102fb0e3 98
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99 if (dst->input_pads[dstpad].config_props)
100 dst->input_pads[dstpad].config_props(link);
102fb0e3 101
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102 return 0;
103}
104
105AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
106{
107 AVFilterPicRef *ret = NULL;
108
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109 if(link->dst->input_pads[link->dstpad].get_video_buffer)
110 ret = link->dst->input_pads[link->dstpad].get_video_buffer(link, perms);
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111
112 if(!ret)
113 ret = avfilter_default_get_video_buffer(link, perms);
114
115 return ret;
116}
117
118void avfilter_request_frame(AVFilterLink *link)
119{
c5ef7d7b 120 const AVFilterPad *pad = &link->src->output_pads[link->srcpad];
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121
122 if(pad->request_frame)
123 pad->request_frame(link);
124 else if(link->src->inputs[0])
125 avfilter_request_frame(link->src->inputs[0]);
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126}
127
128/* XXX: should we do the duplicating of the picture ref here, instead of
129 * forcing the source filter to do it? */
130void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
131{
132 void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
133
c5ef7d7b 134 start_frame = link->dst->input_pads[link->dstpad].start_frame;
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135 if(!start_frame)
136 start_frame = avfilter_default_start_frame;
137
138 start_frame(link, picref);
139}
140
141void avfilter_end_frame(AVFilterLink *link)
142{
143 void (*end_frame)(AVFilterLink *);
144
c5ef7d7b 145 end_frame = link->dst->input_pads[link->dstpad].end_frame;
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146 if(!end_frame)
147 end_frame = avfilter_default_end_frame;
148
149 end_frame(link);
150}
151
152void avfilter_draw_slice(AVFilterLink *link, uint8_t *data[4], int y, int h)
153{
c5ef7d7b 154 if(!link->dst->input_pads[link->dstpad].draw_slice)
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155 return;
156
c5ef7d7b 157 link->dst->input_pads[link->dstpad].draw_slice(link, data, y, h);
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158}
159
160static int filter_cmp(const void *aa, const void *bb)
161{
162 const AVFilter *a = *(const AVFilter **)aa, *b = *(const AVFilter **)bb;
163 return strcmp(a->name, b->name);
164}
165
166AVFilter *avfilter_get_by_name(char *name)
167{
168 AVFilter key = { .name = name, };
169 AVFilter *key2 = &key;
170 AVFilter **ret;
171
172 ret = bsearch(&key2, filters, filter_count, sizeof(AVFilter **), filter_cmp);
173 if(ret)
174 return *ret;
175 return NULL;
176}
177
178/* FIXME: insert in order, rather than insert at end + resort */
179void avfilter_register(AVFilter *filter)
180{
181 filters = av_realloc(filters, sizeof(AVFilter*) * (filter_count+1));
182 filters[filter_count] = filter;
183 qsort(filters, ++filter_count, sizeof(AVFilter **), filter_cmp);
184}
185
186void avfilter_init(void)
187{
d72a138e 188 avfilter_register(&vsrc_dummy);
eaf7eb66 189 avfilter_register(&vsrc_ppm);
d72a138e 190 avfilter_register(&vf_crop);
d4169dd3 191 avfilter_register(&vf_graph);
d72a138e 192 avfilter_register(&vf_passthrough);
72e3037a 193 avfilter_register(&vf_rgb2bgr);
ce356b09 194 avfilter_register(&vf_slicify);
d72a138e 195 avfilter_register(&vo_sdl);
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196}
197
198void avfilter_uninit(void)
199{
200 av_freep(&filters);
201 filter_count = 0;
202}
203
204static int pad_count(const AVFilterPad *pads)
205{
206 AVFilterPad *p = (AVFilterPad *) pads;
207 int count;
208
209 for(count = 0; p->name; count ++) p ++;
210 return count;
211}
212
213static const char *filter_name(void *p)
214{
215 AVFilterContext *filter = p;
216 return filter->filter->name;
217}
218
6ae82d1e 219AVFilterContext *avfilter_create(AVFilter *filter, char *inst_name)
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220{
221 AVFilterContext *ret = av_malloc(sizeof(AVFilterContext));
222
223 ret->av_class = av_mallocz(sizeof(AVClass));
224 ret->av_class->item_name = filter_name;
225 ret->filter = filter;
2350e69c 226 ret->name = inst_name ? av_strdup(inst_name) : NULL;
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227 ret->priv = av_mallocz(filter->priv_size);
228
7d0e1392 229 ret->input_count = pad_count(filter->inputs);
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230 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
231 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
7d0e1392 232 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
c5ef7d7b 233
7d0e1392 234 ret->output_count = pad_count(filter->outputs);
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235 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
236 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
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237 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
238
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239 return ret;
240}
241
242void avfilter_destroy(AVFilterContext *filter)
243{
244 int i;
245
246 if(filter->filter->uninit)
247 filter->filter->uninit(filter);
248
c5ef7d7b 249 for(i = 0; i < filter->input_count; i ++) {
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250 if(filter->inputs[i])
251 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
252 av_free(filter->inputs[i]);
253 }
c5ef7d7b 254 for(i = 0; i < filter->output_count; i ++) {
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255 if(filter->outputs[i])
256 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
257 av_free(filter->outputs[i]);
258 }
259
2350e69c 260 av_free(filter->name);
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261 av_free(filter->input_pads);
262 av_free(filter->output_pads);
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263 av_free(filter->inputs);
264 av_free(filter->outputs);
265 av_free(filter->priv);
266 av_free(filter->av_class);
267 av_free(filter);
268}
269
6ae82d1e 270AVFilterContext *avfilter_create_by_name(char *name, char *inst_name)
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271{
272 AVFilter *filt;
273
274 if(!(filt = avfilter_get_by_name(name))) return NULL;
6ae82d1e 275 return avfilter_create(filt, inst_name);
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276}
277
a360f71e 278int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
4dbbcdee 279{
c6b0aa68 280 int ret;
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281
282 if(filter->filter->init)
a360f71e 283 if((ret = filter->filter->init(filter, args, opaque))) return ret;
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284 return 0;
285}
286
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287int *avfilter_make_format_list(int len, ...)
288{
289 int *ret, i;
290 va_list vl;
291
292 ret = av_malloc(sizeof(int) * (len + 1));
293 va_start(vl, len);
294 for(i = 0; i < len; i ++)
295 ret[i] = va_arg(vl, int);
296 va_end(vl);
297 ret[len] = -1;
298
299 return ret;
300}
301