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path: root/libavfilter/vf_tile.c (plain)
blob: 9af00bd8f517d0e4b04f7a522585e263e76a7f11
1/*
2 * Copyright (c) 2012 Nicolas George
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * tile video filter
24 */
25
26#include "libavutil/opt.h"
27#include "libavutil/pixdesc.h"
28#include "avfilter.h"
29#include "drawutils.h"
30#include "formats.h"
31#include "video.h"
32#include "internal.h"
33
34typedef struct {
35 const AVClass *class;
36 unsigned w, h;
37 unsigned margin;
38 unsigned padding;
39 unsigned current;
40 unsigned nb_frames;
41 FFDrawContext draw;
42 FFDrawColor blank;
43 AVFrame *out_ref;
44 uint8_t rgba_color[4];
45} TileContext;
46
47#define REASONABLE_SIZE 1024
48
49#define OFFSET(x) offsetof(TileContext, x)
50#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
51
52static const AVOption tile_options[] = {
53 { "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
54 {.str = "6x5"}, 0, 0, FLAGS },
55 { "nb_frames", "set maximum number of frame to render", OFFSET(nb_frames),
56 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
57 { "margin", "set outer border margin in pixels", OFFSET(margin),
58 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
59 { "padding", "set inner border thickness in pixels", OFFSET(padding),
60 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
61 { "color", "set the color of the unused area", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
62 { NULL }
63};
64
65AVFILTER_DEFINE_CLASS(tile);
66
67static av_cold int init(AVFilterContext *ctx)
68{
69 TileContext *tile = ctx->priv;
70
71 if (tile->w > REASONABLE_SIZE || tile->h > REASONABLE_SIZE) {
72 av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
73 tile->w, tile->h);
74 return AVERROR(EINVAL);
75 }
76
77 if (tile->nb_frames == 0) {
78 tile->nb_frames = tile->w * tile->h;
79 } else if (tile->nb_frames > tile->w * tile->h) {
80 av_log(ctx, AV_LOG_ERROR, "nb_frames must be less than or equal to %dx%d=%d\n",
81 tile->w, tile->h, tile->w * tile->h);
82 return AVERROR(EINVAL);
83 }
84
85 return 0;
86}
87
88static int query_formats(AVFilterContext *ctx)
89{
90 return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
91}
92
93static int config_props(AVFilterLink *outlink)
94{
95 AVFilterContext *ctx = outlink->src;
96 TileContext *tile = ctx->priv;
97 AVFilterLink *inlink = ctx->inputs[0];
98 const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin;
99 const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin;
100
101 if (inlink->w > (INT_MAX - total_margin_w) / tile->w) {
102 av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n",
103 tile->w, inlink->w);
104 return AVERROR(EINVAL);
105 }
106 if (inlink->h > (INT_MAX - total_margin_h) / tile->h) {
107 av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n",
108 tile->h, inlink->h);
109 return AVERROR(EINVAL);
110 }
111 outlink->w = tile->w * inlink->w + total_margin_w;
112 outlink->h = tile->h * inlink->h + total_margin_h;
113 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
114 outlink->frame_rate = av_mul_q(inlink->frame_rate,
115 av_make_q(1, tile->nb_frames));
116 ff_draw_init(&tile->draw, inlink->format, 0);
117 ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
118
119 return 0;
120}
121
122static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y)
123{
124 TileContext *tile = ctx->priv;
125 AVFilterLink *inlink = ctx->inputs[0];
126 const unsigned tx = tile->current % tile->w;
127 const unsigned ty = tile->current / tile->w;
128
129 *x = tile->margin + (inlink->w + tile->padding) * tx;
130 *y = tile->margin + (inlink->h + tile->padding) * ty;
131}
132
133static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
134{
135 TileContext *tile = ctx->priv;
136 AVFilterLink *inlink = ctx->inputs[0];
137 unsigned x0, y0;
138
139 get_current_tile_pos(ctx, &x0, &y0);
140 ff_fill_rectangle(&tile->draw, &tile->blank,
141 out_buf->data, out_buf->linesize,
142 x0, y0, inlink->w, inlink->h);
143 tile->current++;
144}
145static int end_last_frame(AVFilterContext *ctx)
146{
147 TileContext *tile = ctx->priv;
148 AVFilterLink *outlink = ctx->outputs[0];
149 AVFrame *out_buf = tile->out_ref;
150 int ret;
151
152 while (tile->current < tile->nb_frames)
153 draw_blank_frame(ctx, out_buf);
154 ret = ff_filter_frame(outlink, out_buf);
155 tile->current = 0;
156 return ret;
157}
158
159/* Note: direct rendering is not possible since there is no guarantee that
160 * buffers are fed to filter_frame in the order they were obtained from
161 * get_buffer (think B-frames). */
162
163static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
164{
165 AVFilterContext *ctx = inlink->dst;
166 TileContext *tile = ctx->priv;
167 AVFilterLink *outlink = ctx->outputs[0];
168 unsigned x0, y0;
169
170 if (!tile->current) {
171 tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
172 if (!tile->out_ref) {
173 av_frame_free(&picref);
174 return AVERROR(ENOMEM);
175 }
176 av_frame_copy_props(tile->out_ref, picref);
177 tile->out_ref->width = outlink->w;
178 tile->out_ref->height = outlink->h;
179
180 /* fill surface once for margin/padding */
181 if (tile->margin || tile->padding)
182 ff_fill_rectangle(&tile->draw, &tile->blank,
183 tile->out_ref->data,
184 tile->out_ref->linesize,
185 0, 0, outlink->w, outlink->h);
186 }
187
188 get_current_tile_pos(ctx, &x0, &y0);
189 ff_copy_rectangle2(&tile->draw,
190 tile->out_ref->data, tile->out_ref->linesize,
191 picref->data, picref->linesize,
192 x0, y0, 0, 0, inlink->w, inlink->h);
193
194 av_frame_free(&picref);
195 if (++tile->current == tile->nb_frames)
196 return end_last_frame(ctx);
197
198 return 0;
199}
200
201static int request_frame(AVFilterLink *outlink)
202{
203 AVFilterContext *ctx = outlink->src;
204 TileContext *tile = ctx->priv;
205 AVFilterLink *inlink = ctx->inputs[0];
206 int r;
207
208 r = ff_request_frame(inlink);
209 if (r == AVERROR_EOF && tile->current)
210 r = end_last_frame(ctx);
211 return r;
212}
213
214static const AVFilterPad tile_inputs[] = {
215 {
216 .name = "default",
217 .type = AVMEDIA_TYPE_VIDEO,
218 .filter_frame = filter_frame,
219 },
220 { NULL }
221};
222
223static const AVFilterPad tile_outputs[] = {
224 {
225 .name = "default",
226 .type = AVMEDIA_TYPE_VIDEO,
227 .config_props = config_props,
228 .request_frame = request_frame,
229 },
230 { NULL }
231};
232
233AVFilter ff_vf_tile = {
234 .name = "tile",
235 .description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."),
236 .init = init,
237 .query_formats = query_formats,
238 .priv_size = sizeof(TileContext),
239 .inputs = tile_inputs,
240 .outputs = tile_outputs,
241 .priv_class = &tile_class,
242};
243
generated by cgit at 2024-05-17 03:27:09 (GMT)