| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include "libavutil/avassert.h" | ||
| 20 | #include "libavutil/eval.h" | ||
| 21 | #include "libavutil/opt.h" | ||
| 22 | #include "avfilter.h" | ||
| 23 | #include "filters.h" | ||
| 24 | #include "video.h" | ||
| 25 | |||
| 26 | enum { | ||
| 27 | X, Y, W, H, | ||
| 28 | NB_PARAMS, | ||
| 29 | }; | ||
| 30 | static const char addroi_param_names[] = { | ||
| 31 | 'x', 'y', 'w', 'h', | ||
| 32 | }; | ||
| 33 | |||
| 34 | enum { | ||
| 35 | VAR_IW, | ||
| 36 | VAR_IH, | ||
| 37 | NB_VARS, | ||
| 38 | }; | ||
| 39 | static const char *const addroi_var_names[] = { | ||
| 40 | "iw", | ||
| 41 | "ih", | ||
| 42 | }; | ||
| 43 | |||
| 44 | typedef struct AddROIContext { | ||
| 45 | const AVClass *class; | ||
| 46 | |||
| 47 | char *region_str[NB_PARAMS]; | ||
| 48 | AVExpr *region_expr[NB_PARAMS]; | ||
| 49 | |||
| 50 | int region[NB_PARAMS]; | ||
| 51 | AVRational qoffset; | ||
| 52 | |||
| 53 | int clear; | ||
| 54 | } AddROIContext; | ||
| 55 | |||
| 56 | ✗ | static int addroi_config_input(AVFilterLink *inlink) | |
| 57 | { | ||
| 58 | ✗ | AVFilterContext *avctx = inlink->dst; | |
| 59 | ✗ | AddROIContext *ctx = avctx->priv; | |
| 60 | int i; | ||
| 61 | double vars[NB_VARS]; | ||
| 62 | double val; | ||
| 63 | |||
| 64 | ✗ | vars[VAR_IW] = inlink->w; | |
| 65 | ✗ | vars[VAR_IH] = inlink->h; | |
| 66 | |||
| 67 | ✗ | for (i = 0; i < NB_PARAMS; i++) { | |
| 68 | int max_value; | ||
| 69 | ✗ | switch (i) { | |
| 70 | ✗ | case X: max_value = inlink->w; break; | |
| 71 | ✗ | case Y: max_value = inlink->h; break; | |
| 72 | ✗ | case W: max_value = inlink->w - ctx->region[X]; break; | |
| 73 | ✗ | case H: max_value = inlink->h - ctx->region[Y]; break; | |
| 74 | } | ||
| 75 | |||
| 76 | ✗ | val = av_expr_eval(ctx->region_expr[i], vars, NULL); | |
| 77 | ✗ | if (val < 0.0) { | |
| 78 | ✗ | av_log(avctx, AV_LOG_WARNING, "Calculated value %g for %c is " | |
| 79 | "less than zero - using zero instead.\n", val, | ||
| 80 | ✗ | addroi_param_names[i]); | |
| 81 | ✗ | val = 0.0; | |
| 82 | ✗ | } else if (val > max_value) { | |
| 83 | ✗ | av_log(avctx, AV_LOG_WARNING, "Calculated value %g for %c is " | |
| 84 | "greater than maximum allowed value %d - " | ||
| 85 | ✗ | "using %d instead.\n", val, addroi_param_names[i], | |
| 86 | max_value, max_value); | ||
| 87 | ✗ | val = max_value; | |
| 88 | } | ||
| 89 | ✗ | ctx->region[i] = val; | |
| 90 | } | ||
| 91 | |||
| 92 | ✗ | return 0; | |
| 93 | } | ||
| 94 | |||
| 95 | ✗ | static int addroi_filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
| 96 | { | ||
| 97 | ✗ | AVFilterContext *avctx = inlink->dst; | |
| 98 | ✗ | AVFilterLink *outlink = avctx->outputs[0]; | |
| 99 | ✗ | AddROIContext *ctx = avctx->priv; | |
| 100 | AVRegionOfInterest *roi; | ||
| 101 | AVFrameSideData *sd; | ||
| 102 | int err; | ||
| 103 | |||
| 104 | ✗ | if (ctx->clear) { | |
| 105 | ✗ | av_frame_remove_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST); | |
| 106 | ✗ | sd = NULL; | |
| 107 | } else { | ||
| 108 | ✗ | sd = av_frame_get_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST); | |
| 109 | } | ||
| 110 | ✗ | if (sd) { | |
| 111 | const AVRegionOfInterest *old_roi; | ||
| 112 | uint32_t old_roi_size; | ||
| 113 | AVBufferRef *roi_ref; | ||
| 114 | int nb_roi, i; | ||
| 115 | |||
| 116 | ✗ | old_roi = (const AVRegionOfInterest*)sd->data; | |
| 117 | ✗ | old_roi_size = old_roi->self_size; | |
| 118 | ✗ | av_assert0(old_roi_size && sd->size % old_roi_size == 0); | |
| 119 | ✗ | nb_roi = sd->size / old_roi_size + 1; | |
| 120 | |||
| 121 | ✗ | roi_ref = av_buffer_alloc(sizeof(*roi) * nb_roi); | |
| 122 | ✗ | if (!roi_ref) { | |
| 123 | ✗ | err = AVERROR(ENOMEM); | |
| 124 | ✗ | goto fail; | |
| 125 | } | ||
| 126 | ✗ | roi = (AVRegionOfInterest*)roi_ref->data; | |
| 127 | |||
| 128 | ✗ | for (i = 0; i < nb_roi - 1; i++) { | |
| 129 | ✗ | old_roi = (const AVRegionOfInterest*) | |
| 130 | ✗ | (sd->data + old_roi_size * i); | |
| 131 | |||
| 132 | ✗ | roi[i] = (AVRegionOfInterest) { | |
| 133 | .self_size = sizeof(*roi), | ||
| 134 | ✗ | .top = old_roi->top, | |
| 135 | ✗ | .bottom = old_roi->bottom, | |
| 136 | ✗ | .left = old_roi->left, | |
| 137 | ✗ | .right = old_roi->right, | |
| 138 | ✗ | .qoffset = old_roi->qoffset, | |
| 139 | }; | ||
| 140 | } | ||
| 141 | |||
| 142 | ✗ | roi[nb_roi - 1] = (AVRegionOfInterest) { | |
| 143 | .self_size = sizeof(*roi), | ||
| 144 | ✗ | .top = ctx->region[Y], | |
| 145 | ✗ | .bottom = ctx->region[Y] + ctx->region[H], | |
| 146 | ✗ | .left = ctx->region[X], | |
| 147 | ✗ | .right = ctx->region[X] + ctx->region[W], | |
| 148 | ✗ | .qoffset = ctx->qoffset, | |
| 149 | }; | ||
| 150 | |||
| 151 | ✗ | av_frame_remove_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST); | |
| 152 | |||
| 153 | ✗ | sd = av_frame_new_side_data_from_buf(frame, | |
| 154 | AV_FRAME_DATA_REGIONS_OF_INTEREST, | ||
| 155 | roi_ref); | ||
| 156 | ✗ | if (!sd) { | |
| 157 | ✗ | av_buffer_unref(&roi_ref); | |
| 158 | ✗ | err = AVERROR(ENOMEM); | |
| 159 | ✗ | goto fail; | |
| 160 | } | ||
| 161 | |||
| 162 | } else { | ||
| 163 | ✗ | sd = av_frame_new_side_data(frame, AV_FRAME_DATA_REGIONS_OF_INTEREST, | |
| 164 | sizeof(AVRegionOfInterest)); | ||
| 165 | ✗ | if (!sd) { | |
| 166 | ✗ | err = AVERROR(ENOMEM); | |
| 167 | ✗ | goto fail; | |
| 168 | } | ||
| 169 | ✗ | roi = (AVRegionOfInterest*)sd->data; | |
| 170 | ✗ | *roi = (AVRegionOfInterest) { | |
| 171 | .self_size = sizeof(*roi), | ||
| 172 | ✗ | .top = ctx->region[Y], | |
| 173 | ✗ | .bottom = ctx->region[Y] + ctx->region[H], | |
| 174 | ✗ | .left = ctx->region[X], | |
| 175 | ✗ | .right = ctx->region[X] + ctx->region[W], | |
| 176 | ✗ | .qoffset = ctx->qoffset, | |
| 177 | }; | ||
| 178 | } | ||
| 179 | |||
| 180 | ✗ | return ff_filter_frame(outlink, frame); | |
| 181 | |||
| 182 | ✗ | fail: | |
| 183 | ✗ | av_frame_free(&frame); | |
| 184 | ✗ | return err; | |
| 185 | } | ||
| 186 | |||
| 187 | ✗ | static av_cold int addroi_init(AVFilterContext *avctx) | |
| 188 | { | ||
| 189 | ✗ | AddROIContext *ctx = avctx->priv; | |
| 190 | int i, err; | ||
| 191 | |||
| 192 | ✗ | for (i = 0; i < NB_PARAMS; i++) { | |
| 193 | ✗ | err = av_expr_parse(&ctx->region_expr[i], ctx->region_str[i], | |
| 194 | addroi_var_names, NULL, NULL, NULL, NULL, | ||
| 195 | 0, avctx); | ||
| 196 | ✗ | if (err < 0) { | |
| 197 | ✗ | av_log(ctx, AV_LOG_ERROR, | |
| 198 | "Error parsing %c expression '%s'.\n", | ||
| 199 | ✗ | addroi_param_names[i], ctx->region_str[i]); | |
| 200 | ✗ | return err; | |
| 201 | } | ||
| 202 | } | ||
| 203 | |||
| 204 | ✗ | return 0; | |
| 205 | } | ||
| 206 | |||
| 207 | ✗ | static av_cold void addroi_uninit(AVFilterContext *avctx) | |
| 208 | { | ||
| 209 | ✗ | AddROIContext *ctx = avctx->priv; | |
| 210 | int i; | ||
| 211 | |||
| 212 | ✗ | for (i = 0; i < NB_PARAMS; i++) { | |
| 213 | ✗ | av_expr_free(ctx->region_expr[i]); | |
| 214 | ✗ | ctx->region_expr[i] = NULL; | |
| 215 | } | ||
| 216 | ✗ | } | |
| 217 | |||
| 218 | #define OFFSET(x) offsetof(AddROIContext, x) | ||
| 219 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | ||
| 220 | static const AVOption addroi_options[] = { | ||
| 221 | { "x", "Region distance from left edge of frame.", | ||
| 222 | OFFSET(region_str[X]), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, | ||
| 223 | { "y", "Region distance from top edge of frame.", | ||
| 224 | OFFSET(region_str[Y]), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, | ||
| 225 | { "w", "Region width.", | ||
| 226 | OFFSET(region_str[W]), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, | ||
| 227 | { "h", "Region height.", | ||
| 228 | OFFSET(region_str[H]), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, | ||
| 229 | |||
| 230 | { "qoffset", "Quantisation offset to apply in the region.", | ||
| 231 | OFFSET(qoffset), AV_OPT_TYPE_RATIONAL, { .dbl = -0.1 }, -1, +1, FLAGS }, | ||
| 232 | |||
| 233 | { "clear", "Remove any existing regions of interest before adding the new one.", | ||
| 234 | OFFSET(clear), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, | ||
| 235 | |||
| 236 | { NULL } | ||
| 237 | }; | ||
| 238 | |||
| 239 | AVFILTER_DEFINE_CLASS(addroi); | ||
| 240 | |||
| 241 | static const AVFilterPad addroi_inputs[] = { | ||
| 242 | { | ||
| 243 | .name = "default", | ||
| 244 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 245 | .config_props = addroi_config_input, | ||
| 246 | .filter_frame = addroi_filter_frame, | ||
| 247 | }, | ||
| 248 | }; | ||
| 249 | |||
| 250 | const AVFilter ff_vf_addroi = { | ||
| 251 | .name = "addroi", | ||
| 252 | .description = NULL_IF_CONFIG_SMALL("Add region of interest to frame."), | ||
| 253 | .init = addroi_init, | ||
| 254 | .uninit = addroi_uninit, | ||
| 255 | |||
| 256 | .priv_size = sizeof(AddROIContext), | ||
| 257 | .priv_class = &addroi_class, | ||
| 258 | |||
| 259 | .flags = AVFILTER_FLAG_METADATA_ONLY, | ||
| 260 | |||
| 261 | FILTER_INPUTS(addroi_inputs), | ||
| 262 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 263 | }; | ||
| 264 |