2 * Copyright (c) 2012 Nicolas George
4 * This file is part of FFmpeg.
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.
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.
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
26 #include "libavutil/imgutils.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
30 #include "drawutils.h"
35 typedef struct TileContext {
41 unsigned init_padding;
47 AVFrame *prev_out_ref;
48 uint8_t rgba_color[4];
51 #define OFFSET(x) offsetof(TileContext, x)
52 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
54 static const AVOption tile_options[] = {
55 { "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
56 {.str = "6x5"}, 0, 0, FLAGS },
57 { "nb_frames", "set maximum number of frame to render", OFFSET(nb_frames),
58 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
59 { "margin", "set outer border margin in pixels", OFFSET(margin),
60 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
61 { "padding", "set inner border thickness in pixels", OFFSET(padding),
62 AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
63 { "color", "set the color of the unused area", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
64 { "overlap", "set how many frames to overlap for each render", OFFSET(overlap),
65 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
66 { "init_padding", " set how many frames to initially pad", OFFSET(init_padding),
67 AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
71 AVFILTER_DEFINE_CLASS(tile);
73 static av_cold int init(AVFilterContext *ctx)
75 TileContext *tile = ctx->priv;
77 if (tile->w > UINT_MAX / tile->h) {
78 av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
80 return AVERROR(EINVAL);
84 if ((tile->w - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding) ||
85 (tile->h - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding)) {
86 av_log(ctx, AV_LOG_ERROR, "Combination of Tile size %ux%u, padding %d and margin %d overflows.\n",
87 tile->w, tile->h, tile->padding, tile->margin);
88 return AVERROR(EINVAL);
92 if (tile->nb_frames == 0) {
93 tile->nb_frames = tile->w * tile->h;
94 } else if (tile->nb_frames > tile->w * tile->h) {
95 av_log(ctx, AV_LOG_ERROR, "nb_frames must be less than or equal to %dx%d=%d\n",
96 tile->w, tile->h, tile->w * tile->h);
97 return AVERROR(EINVAL);
100 if (tile->overlap >= tile->nb_frames) {
101 av_log(ctx, AV_LOG_WARNING, "overlap must be less than %d\n", tile->nb_frames);
102 tile->overlap = tile->nb_frames - 1;
105 if (tile->init_padding >= tile->nb_frames) {
106 av_log(ctx, AV_LOG_WARNING, "init_padding must be less than %d\n", tile->nb_frames);
108 tile->current = tile->init_padding;
114 static int query_formats(AVFilterContext *ctx)
116 return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
119 static int config_props(AVFilterLink *outlink)
121 AVFilterContext *ctx = outlink->src;
122 TileContext *tile = ctx->priv;
123 AVFilterLink *inlink = ctx->inputs[0];
124 const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin;
125 const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin;
127 if (inlink->w > (INT_MAX - total_margin_w) / tile->w) {
128 av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n",
130 return AVERROR(EINVAL);
132 if (inlink->h > (INT_MAX - total_margin_h) / tile->h) {
133 av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n",
135 return AVERROR(EINVAL);
137 outlink->w = tile->w * inlink->w + total_margin_w;
138 outlink->h = tile->h * inlink->h + total_margin_h;
139 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
140 outlink->frame_rate = av_mul_q(inlink->frame_rate,
141 av_make_q(1, tile->nb_frames - tile->overlap));
142 ff_draw_init(&tile->draw, inlink->format, 0);
143 ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
148 static void get_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y, unsigned current)
150 TileContext *tile = ctx->priv;
151 AVFilterLink *inlink = ctx->inputs[0];
152 const unsigned tx = current % tile->w;
153 const unsigned ty = current / tile->w;
155 *x = tile->margin + (inlink->w + tile->padding) * tx;
156 *y = tile->margin + (inlink->h + tile->padding) * ty;
159 static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
161 TileContext *tile = ctx->priv;
162 AVFilterLink *inlink = ctx->inputs[0];
165 get_tile_pos(ctx, &x0, &y0, tile->current);
166 ff_fill_rectangle(&tile->draw, &tile->blank,
167 out_buf->data, out_buf->linesize,
168 x0, y0, inlink->w, inlink->h);
172 static int end_last_frame(AVFilterContext *ctx)
174 TileContext *tile = ctx->priv;
175 AVFilterLink *outlink = ctx->outputs[0];
176 AVFrame *out_buf = tile->out_ref;
179 while (tile->current < tile->nb_frames)
180 draw_blank_frame(ctx, out_buf);
181 tile->current = tile->overlap;
183 av_frame_free(&tile->prev_out_ref);
184 tile->prev_out_ref = av_frame_clone(out_buf);
186 ret = ff_filter_frame(outlink, out_buf);
187 tile->out_ref = NULL;
191 /* Note: direct rendering is not possible since there is no guarantee that
192 * buffers are fed to filter_frame in the order they were obtained from
193 * get_buffer (think B-frames). */
195 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
197 AVFilterContext *ctx = inlink->dst;
198 TileContext *tile = ctx->priv;
199 AVFilterLink *outlink = ctx->outputs[0];
202 if (!tile->out_ref) {
203 tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
204 if (!tile->out_ref) {
205 av_frame_free(&picref);
206 return AVERROR(ENOMEM);
208 av_frame_copy_props(tile->out_ref, picref);
209 tile->out_ref->width = outlink->w;
210 tile->out_ref->height = outlink->h;
212 /* fill surface once for margin/padding */
213 if (tile->margin || tile->padding || tile->init_padding)
214 ff_fill_rectangle(&tile->draw, &tile->blank,
216 tile->out_ref->linesize,
217 0, 0, outlink->w, outlink->h);
218 tile->init_padding = 0;
221 if (tile->prev_out_ref) {
224 for (i = tile->nb_frames - tile->overlap; i < tile->nb_frames; i++) {
225 get_tile_pos(ctx, &x1, &y1, i);
226 get_tile_pos(ctx, &x0, &y0, i - (tile->nb_frames - tile->overlap));
227 ff_copy_rectangle2(&tile->draw,
228 tile->out_ref->data, tile->out_ref->linesize,
229 tile->prev_out_ref->data, tile->prev_out_ref->linesize,
230 x0, y0, x1, y1, inlink->w, inlink->h);
235 get_tile_pos(ctx, &x0, &y0, tile->current);
236 ff_copy_rectangle2(&tile->draw,
237 tile->out_ref->data, tile->out_ref->linesize,
238 picref->data, picref->linesize,
239 x0, y0, 0, 0, inlink->w, inlink->h);
241 av_frame_free(&picref);
242 if (++tile->current == tile->nb_frames)
243 return end_last_frame(ctx);
248 static int request_frame(AVFilterLink *outlink)
250 AVFilterContext *ctx = outlink->src;
251 TileContext *tile = ctx->priv;
252 AVFilterLink *inlink = ctx->inputs[0];
255 r = ff_request_frame(inlink);
256 if (r == AVERROR_EOF && tile->current && tile->out_ref)
257 r = end_last_frame(ctx);
261 static av_cold void uninit(AVFilterContext *ctx)
263 TileContext *tile = ctx->priv;
265 av_frame_free(&tile->prev_out_ref);
268 static const AVFilterPad tile_inputs[] = {
271 .type = AVMEDIA_TYPE_VIDEO,
272 .filter_frame = filter_frame,
277 static const AVFilterPad tile_outputs[] = {
280 .type = AVMEDIA_TYPE_VIDEO,
281 .config_props = config_props,
282 .request_frame = request_frame,
287 AVFilter ff_vf_tile = {
289 .description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."),
292 .query_formats = query_formats,
293 .priv_size = sizeof(TileContext),
294 .inputs = tile_inputs,
295 .outputs = tile_outputs,
296 .priv_class = &tile_class,