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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 | ||
34 | typedef 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 | ||
52 | static 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 | ||
65 | AVFILTER_DEFINE_CLASS(tile); | |
66 | ||
67 | static 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 | ||
88 | static int query_formats(AVFilterContext *ctx) | |
89 | { | |
90 | ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int config_props(AVFilterLink *outlink) | |
95 | { | |
96 | AVFilterContext *ctx = outlink->src; | |
97 | TileContext *tile = ctx->priv; | |
98 | AVFilterLink *inlink = ctx->inputs[0]; | |
99 | const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin; | |
100 | const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin; | |
101 | ||
102 | if (inlink->w > (INT_MAX - total_margin_w) / tile->w) { | |
103 | av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n", | |
104 | tile->w, inlink->w); | |
105 | return AVERROR(EINVAL); | |
106 | } | |
107 | if (inlink->h > (INT_MAX - total_margin_h) / tile->h) { | |
108 | av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n", | |
109 | tile->h, inlink->h); | |
110 | return AVERROR(EINVAL); | |
111 | } | |
112 | outlink->w = tile->w * inlink->w + total_margin_w; | |
113 | outlink->h = tile->h * inlink->h + total_margin_h; | |
114 | outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; | |
115 | outlink->frame_rate = av_mul_q(inlink->frame_rate, | |
116 | av_make_q(1, tile->nb_frames)); | |
117 | ff_draw_init(&tile->draw, inlink->format, 0); | |
118 | ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color); | |
119 | ||
120 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y) | |
126 | { | |
127 | TileContext *tile = ctx->priv; | |
128 | AVFilterLink *inlink = ctx->inputs[0]; | |
129 | const unsigned tx = tile->current % tile->w; | |
130 | const unsigned ty = tile->current / tile->w; | |
131 | ||
132 | *x = tile->margin + (inlink->w + tile->padding) * tx; | |
133 | *y = tile->margin + (inlink->h + tile->padding) * ty; | |
134 | } | |
135 | ||
136 | static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf) | |
137 | { | |
138 | TileContext *tile = ctx->priv; | |
139 | AVFilterLink *inlink = ctx->inputs[0]; | |
140 | unsigned x0, y0; | |
141 | ||
142 | get_current_tile_pos(ctx, &x0, &y0); | |
143 | ff_fill_rectangle(&tile->draw, &tile->blank, | |
144 | out_buf->data, out_buf->linesize, | |
145 | x0, y0, inlink->w, inlink->h); | |
146 | tile->current++; | |
147 | } | |
148 | static int end_last_frame(AVFilterContext *ctx) | |
149 | { | |
150 | TileContext *tile = ctx->priv; | |
151 | AVFilterLink *outlink = ctx->outputs[0]; | |
152 | AVFrame *out_buf = tile->out_ref; | |
153 | int ret; | |
154 | ||
155 | while (tile->current < tile->nb_frames) | |
156 | draw_blank_frame(ctx, out_buf); | |
157 | ret = ff_filter_frame(outlink, out_buf); | |
158 | tile->current = 0; | |
159 | return ret; | |
160 | } | |
161 | ||
162 | /* Note: direct rendering is not possible since there is no guarantee that | |
163 | * buffers are fed to filter_frame in the order they were obtained from | |
164 | * get_buffer (think B-frames). */ | |
165 | ||
166 | static int filter_frame(AVFilterLink *inlink, AVFrame *picref) | |
167 | { | |
168 | AVFilterContext *ctx = inlink->dst; | |
169 | TileContext *tile = ctx->priv; | |
170 | AVFilterLink *outlink = ctx->outputs[0]; | |
171 | unsigned x0, y0; | |
172 | ||
173 | if (!tile->current) { | |
174 | tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
175 | if (!tile->out_ref) { | |
176 | av_frame_free(&picref); | |
177 | return AVERROR(ENOMEM); | |
178 | } | |
179 | av_frame_copy_props(tile->out_ref, picref); | |
180 | tile->out_ref->width = outlink->w; | |
181 | tile->out_ref->height = outlink->h; | |
182 | ||
183 | /* fill surface once for margin/padding */ | |
184 | if (tile->margin || tile->padding) | |
185 | ff_fill_rectangle(&tile->draw, &tile->blank, | |
186 | tile->out_ref->data, | |
187 | tile->out_ref->linesize, | |
188 | 0, 0, outlink->w, outlink->h); | |
189 | } | |
190 | ||
191 | get_current_tile_pos(ctx, &x0, &y0); | |
192 | ff_copy_rectangle2(&tile->draw, | |
193 | tile->out_ref->data, tile->out_ref->linesize, | |
194 | picref->data, picref->linesize, | |
195 | x0, y0, 0, 0, inlink->w, inlink->h); | |
196 | ||
197 | av_frame_free(&picref); | |
198 | if (++tile->current == tile->nb_frames) | |
199 | return end_last_frame(ctx); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static int request_frame(AVFilterLink *outlink) | |
205 | { | |
206 | AVFilterContext *ctx = outlink->src; | |
207 | TileContext *tile = ctx->priv; | |
208 | AVFilterLink *inlink = ctx->inputs[0]; | |
209 | int r; | |
210 | ||
211 | r = ff_request_frame(inlink); | |
212 | if (r == AVERROR_EOF && tile->current) | |
213 | r = end_last_frame(ctx); | |
214 | return r; | |
215 | } | |
216 | ||
217 | static const AVFilterPad tile_inputs[] = { | |
218 | { | |
219 | .name = "default", | |
220 | .type = AVMEDIA_TYPE_VIDEO, | |
221 | .filter_frame = filter_frame, | |
222 | }, | |
223 | { NULL } | |
224 | }; | |
225 | ||
226 | static const AVFilterPad tile_outputs[] = { | |
227 | { | |
228 | .name = "default", | |
229 | .type = AVMEDIA_TYPE_VIDEO, | |
230 | .config_props = config_props, | |
231 | .request_frame = request_frame, | |
232 | }, | |
233 | { NULL } | |
234 | }; | |
235 | ||
236 | AVFilter ff_vf_tile = { | |
237 | .name = "tile", | |
238 | .description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."), | |
239 | .init = init, | |
240 | .query_formats = query_formats, | |
241 | .priv_size = sizeof(TileContext), | |
242 | .inputs = tile_inputs, | |
243 | .outputs = tile_outputs, | |
244 | .priv_class = &tile_class, | |
245 | }; |