| 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 | }; |