| /* |
| * Copyright (c) 2008 Affine Systems, Inc (Michael Sullivan, Bobby Impollonia) |
| * Copyright (c) 2013 Andrey Utkin <andrey.krieger.utkin gmail com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Box and grid drawing filters. Also a nice template for a filter |
| * that needs to write in the input frame. |
| */ |
| |
| #include "libavutil/colorspace.h" |
| #include "libavutil/common.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/eval.h" |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/parseutils.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| static const char *const var_names[] = { |
| "dar", |
| "hsub", "vsub", |
| "in_h", "ih", ///< height of the input video |
| "in_w", "iw", ///< width of the input video |
| "sar", |
| "x", |
| "y", |
| "h", ///< height of the rendered box |
| "w", ///< width of the rendered box |
| "t", |
| "max", |
| NULL |
| }; |
| |
| enum { Y, U, V, A }; |
| |
| enum var_name { |
| VAR_DAR, |
| VAR_HSUB, VAR_VSUB, |
| VAR_IN_H, VAR_IH, |
| VAR_IN_W, VAR_IW, |
| VAR_SAR, |
| VAR_X, |
| VAR_Y, |
| VAR_H, |
| VAR_W, |
| VAR_T, |
| VAR_MAX, |
| VARS_NB |
| }; |
| |
| typedef struct DrawBoxContext { |
| const AVClass *class; |
| int x, y, w, h; |
| int thickness; |
| char *color_str; |
| unsigned char yuv_color[4]; |
| int invert_color; ///< invert luma color |
| int vsub, hsub; ///< chroma subsampling |
| char *x_expr, *y_expr; ///< expression for x and y |
| char *w_expr, *h_expr; ///< expression for width and height |
| char *t_expr; ///< expression for thickness |
| } DrawBoxContext; |
| |
| static const int NUM_EXPR_EVALS = 5; |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| DrawBoxContext *s = ctx->priv; |
| uint8_t rgba_color[4]; |
| |
| if (!strcmp(s->color_str, "invert")) |
| s->invert_color = 1; |
| else if (av_parse_color(rgba_color, s->color_str, -1, ctx) < 0) |
| return AVERROR(EINVAL); |
| |
| if (!s->invert_color) { |
| s->yuv_color[Y] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]); |
| s->yuv_color[U] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); |
| s->yuv_color[V] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0); |
| s->yuv_color[A] = rgba_color[3]; |
| } |
| |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
| AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
| AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P, |
| AV_PIX_FMT_NONE |
| }; |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| DrawBoxContext *s = ctx->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| double var_values[VARS_NB], res; |
| char *expr; |
| int ret; |
| int i; |
| |
| s->hsub = desc->log2_chroma_w; |
| s->vsub = desc->log2_chroma_h; |
| |
| var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h; |
| var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w; |
| var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1; |
| var_values[VAR_DAR] = (double)inlink->w / inlink->h * var_values[VAR_SAR]; |
| var_values[VAR_HSUB] = s->hsub; |
| var_values[VAR_VSUB] = s->vsub; |
| var_values[VAR_X] = NAN; |
| var_values[VAR_Y] = NAN; |
| var_values[VAR_H] = NAN; |
| var_values[VAR_W] = NAN; |
| var_values[VAR_T] = NAN; |
| |
| for (i = 0; i <= NUM_EXPR_EVALS; i++) { |
| /* evaluate expressions, fail on last iteration */ |
| var_values[VAR_MAX] = inlink->w; |
| if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr), |
| var_names, var_values, |
| NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS) |
| goto fail; |
| s->x = var_values[VAR_X] = res; |
| |
| var_values[VAR_MAX] = inlink->h; |
| if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr), |
| var_names, var_values, |
| NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS) |
| goto fail; |
| s->y = var_values[VAR_Y] = res; |
| |
| var_values[VAR_MAX] = inlink->w - s->x; |
| if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr), |
| var_names, var_values, |
| NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS) |
| goto fail; |
| s->w = var_values[VAR_W] = res; |
| |
| var_values[VAR_MAX] = inlink->h - s->y; |
| if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr), |
| var_names, var_values, |
| NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS) |
| goto fail; |
| s->h = var_values[VAR_H] = res; |
| |
| var_values[VAR_MAX] = INT_MAX; |
| if ((ret = av_expr_parse_and_eval(&res, (expr = s->t_expr), |
| var_names, var_values, |
| NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0 && i == NUM_EXPR_EVALS) |
| goto fail; |
| s->thickness = var_values[VAR_T] = res; |
| } |
| |
| /* if w or h are zero, use the input w/h */ |
| s->w = (s->w > 0) ? s->w : inlink->w; |
| s->h = (s->h > 0) ? s->h : inlink->h; |
| |
| /* sanity check width and height */ |
| if (s->w < 0 || s->h < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Size values less than 0 are not acceptable.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| av_log(ctx, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n", |
| s->x, s->y, s->w, s->h, |
| s->yuv_color[Y], s->yuv_color[U], s->yuv_color[V], s->yuv_color[A]); |
| |
| return 0; |
| |
| fail: |
| av_log(ctx, AV_LOG_ERROR, |
| "Error when evaluating the expression '%s'.\n", |
| expr); |
| return ret; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| { |
| DrawBoxContext *s = inlink->dst->priv; |
| int plane, x, y, xb = s->x, yb = s->y; |
| unsigned char *row[4]; |
| |
| for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) { |
| row[0] = frame->data[0] + y * frame->linesize[0]; |
| |
| for (plane = 1; plane < 3; plane++) |
| row[plane] = frame->data[plane] + |
| frame->linesize[plane] * (y >> s->vsub); |
| |
| if (s->invert_color) { |
| for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) |
| if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) || |
| (x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness)) |
| row[0][x] = 0xff - row[0][x]; |
| } else { |
| for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) { |
| double alpha = (double)s->yuv_color[A] / 255; |
| |
| if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) || |
| (x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness)) { |
| row[0][x ] = (1 - alpha) * row[0][x ] + alpha * s->yuv_color[Y]; |
| row[1][x >> s->hsub] = (1 - alpha) * row[1][x >> s->hsub] + alpha * s->yuv_color[U]; |
| row[2][x >> s->hsub] = (1 - alpha) * row[2][x >> s->hsub] + alpha * s->yuv_color[V]; |
| } |
| } |
| } |
| } |
| |
| return ff_filter_frame(inlink->dst->outputs[0], frame); |
| } |
| |
| #define OFFSET(x) offsetof(DrawBoxContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| |
| #if CONFIG_DRAWBOX_FILTER |
| |
| static const AVOption drawbox_options[] = { |
| { "x", "set horizontal position of the left box edge", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "y", "set vertical position of the top box edge", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "width", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "w", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "height", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "h", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "color", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "c", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "thickness", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "t", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(drawbox); |
| |
| static const AVFilterPad drawbox_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_input, |
| .filter_frame = filter_frame, |
| .needs_writable = 1, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad drawbox_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_drawbox = { |
| .name = "drawbox", |
| .description = NULL_IF_CONFIG_SMALL("Draw a colored box on the input video."), |
| .priv_size = sizeof(DrawBoxContext), |
| .priv_class = &drawbox_class, |
| .init = init, |
| .query_formats = query_formats, |
| .inputs = drawbox_inputs, |
| .outputs = drawbox_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |
| #endif /* CONFIG_DRAWBOX_FILTER */ |
| |
| #if CONFIG_DRAWGRID_FILTER |
| static av_pure av_always_inline int pixel_belongs_to_grid(DrawBoxContext *drawgrid, int x, int y) |
| { |
| // x is horizontal (width) coord, |
| // y is vertical (height) coord |
| int x_modulo; |
| int y_modulo; |
| |
| // Abstract from the offset |
| x -= drawgrid->x; |
| y -= drawgrid->y; |
| |
| x_modulo = x % drawgrid->w; |
| y_modulo = y % drawgrid->h; |
| |
| // If x or y got negative, fix values to preserve logics |
| if (x_modulo < 0) |
| x_modulo += drawgrid->w; |
| if (y_modulo < 0) |
| y_modulo += drawgrid->h; |
| |
| return x_modulo < drawgrid->thickness // Belongs to vertical line |
| || y_modulo < drawgrid->thickness; // Belongs to horizontal line |
| } |
| |
| static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| { |
| DrawBoxContext *drawgrid = inlink->dst->priv; |
| int plane, x, y; |
| uint8_t *row[4]; |
| |
| for (y = 0; y < frame->height; y++) { |
| row[0] = frame->data[0] + y * frame->linesize[0]; |
| |
| for (plane = 1; plane < 3; plane++) |
| row[plane] = frame->data[plane] + |
| frame->linesize[plane] * (y >> drawgrid->vsub); |
| |
| if (drawgrid->invert_color) { |
| for (x = 0; x < frame->width; x++) |
| if (pixel_belongs_to_grid(drawgrid, x, y)) |
| row[0][x] = 0xff - row[0][x]; |
| } else { |
| for (x = 0; x < frame->width; x++) { |
| double alpha = (double)drawgrid->yuv_color[A] / 255; |
| |
| if (pixel_belongs_to_grid(drawgrid, x, y)) { |
| row[0][x ] = (1 - alpha) * row[0][x ] + alpha * drawgrid->yuv_color[Y]; |
| row[1][x >> drawgrid->hsub] = (1 - alpha) * row[1][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[U]; |
| row[2][x >> drawgrid->hsub] = (1 - alpha) * row[2][x >> drawgrid->hsub] + alpha * drawgrid->yuv_color[V]; |
| } |
| } |
| } |
| } |
| |
| return ff_filter_frame(inlink->dst->outputs[0], frame); |
| } |
| |
| static const AVOption drawgrid_options[] = { |
| { "x", "set horizontal offset", OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "y", "set vertical offset", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "width", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "w", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "height", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "h", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "color", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "c", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "thickness", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { "t", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX, FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(drawgrid); |
| |
| static const AVFilterPad drawgrid_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_input, |
| .filter_frame = drawgrid_filter_frame, |
| .needs_writable = 1, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad drawgrid_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_drawgrid = { |
| .name = "drawgrid", |
| .description = NULL_IF_CONFIG_SMALL("Draw a colored grid on the input video."), |
| .priv_size = sizeof(DrawBoxContext), |
| .priv_class = &drawgrid_class, |
| .init = init, |
| .query_formats = query_formats, |
| .inputs = drawgrid_inputs, |
| .outputs = drawgrid_outputs, |
| .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| }; |
| |
| #endif /* CONFIG_DRAWGRID_FILTER */ |
