Add FourCC MJPG for CODEC_ID_JPEGLS.
[libav.git] / libavfilter / defaults.c
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1/*
2 * Filter layer - default implementations
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
245976da 22#include "libavcodec/imgconvert.h"
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23#include "avfilter.h"
24
25/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */
1250fcc8 26static void avfilter_default_free_video_buffer(AVFilterPic *pic)
bf4ce7a3 27{
790a03d7 28 av_free(pic->data[0]);
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29 av_free(pic);
30}
31
32/* TODO: set the buffer's priv member to a context structure for the whole
33 * filter chain. This will allow for a buffer pool instead of the constant
34 * alloc & free cycle currently implemented. */
0eb4ff9e 35AVFilterPicRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
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36{
37 AVFilterPic *pic = av_mallocz(sizeof(AVFilterPic));
38 AVFilterPicRef *ref = av_mallocz(sizeof(AVFilterPicRef));
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39 int i, tempsize;
40 char *buf;
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41
42 ref->pic = pic;
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43 ref->w = pic->w = w;
44 ref->h = pic->h = h;
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45
46 /* make sure the buffer gets read permission or it's useless for output */
47 ref->perms = perms | AV_PERM_READ;
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48
49 pic->refcount = 1;
50 pic->format = link->format;
51 pic->free = avfilter_default_free_video_buffer;
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52 ff_fill_linesize((AVPicture *)pic, pic->format, ref->w);
53
54 for (i=0; i<4;i++)
ef516f73 55 pic->linesize[i] = FFALIGN(pic->linesize[i], 16);
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56
57 tempsize = ff_fill_pointer((AVPicture *)pic, NULL, pic->format, ref->h);
58 buf = av_malloc(tempsize);
59 ff_fill_pointer((AVPicture *)pic, buf, pic->format, ref->h);
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60
61 memcpy(ref->data, pic->data, sizeof(pic->data));
62 memcpy(ref->linesize, pic->linesize, sizeof(pic->linesize));
63
64 return ref;
65}
66
67void avfilter_default_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
68{
69 AVFilterLink *out = NULL;
70
71 if(link->dst->output_count)
72 out = link->dst->outputs[0];
73
bf4ce7a3 74 if(out) {
b5eab66e 75 out->outpic = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);
bf4ce7a3 76 out->outpic->pts = picref->pts;
5bb5c1dc 77 out->outpic->pos = picref->pos;
3b2142af 78 out->outpic->pixel_aspect = picref->pixel_aspect;
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79 out->outpic->interlaced = picref->interlaced;
80 out->outpic->top_field_first = picref->top_field_first;
23274667 81 avfilter_start_frame(out, avfilter_ref_pic(out->outpic, ~0));
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82 }
83}
84
a13a5437 85void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
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86{
87 AVFilterLink *out = NULL;
88
89 if(link->dst->output_count)
90 out = link->dst->outputs[0];
91
92 if(out)
a13a5437 93 avfilter_draw_slice(out, y, h, slice_dir);
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94}
95
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96void avfilter_default_end_frame(AVFilterLink *link)
97{
98 AVFilterLink *out = NULL;
99
100 if(link->dst->output_count)
101 out = link->dst->outputs[0];
102
103 avfilter_unref_pic(link->cur_pic);
104 link->cur_pic = NULL;
105
106 if(out) {
552c0208 107 if(out->outpic) {
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108 avfilter_unref_pic(out->outpic);
109 out->outpic = NULL;
552c0208 110 }
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111 avfilter_end_frame(out);
112 }
113}
114
115/**
116 * default config_link() implementation for output video links to simplify
117 * the implementation of one input one output video filters */
118int avfilter_default_config_output_link(AVFilterLink *link)
119{
120 if(link->src->input_count && link->src->inputs[0]) {
121 link->w = link->src->inputs[0]->w;
122 link->h = link->src->inputs[0]->h;
123 } else {
124 /* XXX: any non-simple filter which would cause this branch to be taken
125 * really should implement its own config_props() for this link. */
d0e4eba5 126 return -1;
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127 }
128
129 return 0;
130}
131
132/**
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133 * A helper for query_formats() which sets all links to the same list of
134 * formats. If there are no links hooked to this filter, the list of formats is
135 * freed.
136 *
137 * FIXME: this will need changed for filters with a mix of pad types
138 * (video + audio, etc)
139 */
140void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
bf4ce7a3 141{
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142 int count = 0, i;
143
144 for(i = 0; i < ctx->input_count; i ++) {
145 if(ctx->inputs[i]) {
146 avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats);
147 count ++;
148 }
149 }
150 for(i = 0; i < ctx->output_count; i ++) {
151 if(ctx->outputs[i]) {
152 avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats);
153 count ++;
154 }
155 }
156
157 if(!count) {
158 av_free(formats->formats);
159 av_free(formats->refs);
160 av_free(formats);
161 }
162}
163
164int avfilter_default_query_formats(AVFilterContext *ctx)
165{
166 avfilter_set_common_formats(ctx, avfilter_all_colorspaces());
167 return 0;
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168}
169
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170void avfilter_null_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
171{
172 avfilter_start_frame(link->dst->outputs[0], picref);
173}
174
175void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
176{
177 avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
178}
179
180void avfilter_null_end_frame(AVFilterLink *link)
181{
182 avfilter_end_frame(link->dst->outputs[0]);
183}
184
185AVFilterPicRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
186{
187 return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
188}
189