diff options
Diffstat (limited to 'libavfilter/vf_drawbox.c')
-rw-r--r-- | libavfilter/vf_drawbox.c | 333 |
1 files changed, 277 insertions, 56 deletions
diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c index ab14af2..115df88 100644 --- a/libavfilter/vf_drawbox.c +++ b/libavfilter/vf_drawbox.c @@ -1,32 +1,34 @@ /* * 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 Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * 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 drawing filter. Also a nice template for a filter that needs to - * write in the input frame. + * 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" @@ -34,35 +36,74 @@ #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", + 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, + VARS_NB +}; + typedef struct DrawBoxContext { const AVClass *class; - int x, y, w_opt, h_opt, w, h; + 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 (av_parse_color(rgba_color, s->color_str, -1, ctx) < 0) + 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); - 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]; + 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) { - enum AVPixelFormat pix_fmts[] = { + 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, @@ -76,20 +117,83 @@ static int query_formats(AVFilterContext *ctx) static int config_input(AVFilterLink *inlink) { - DrawBoxContext *s = inlink->dst->priv; + 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; - s->w = (s->w_opt > 0) ? s->w_opt : inlink->w; - s->h = (s->h_opt > 0) ? s->h_opt : inlink->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 */ + 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; + + 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; + + 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; + + 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; + + 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(inlink->dst, AV_LOG_VERBOSE, "x:%d y:%d w:%d h:%d color:0x%02X%02X%02X%02X\n", - s->w, s->y, s->w, s->h, + 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) @@ -105,14 +209,21 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) row[plane] = frame->data[plane] + frame->linesize[plane] * (y >> s->vsub); - for (x = FFMAX(xb, 0); x < (xb + s->w) && x < frame->width; x++) { - double alpha = (double)s->yuv_color[A] / 255; + 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 < 3) || (yb + s->h - y < 4) || - (x - xb < 3) || (xb + s->w - x < 4)) { - 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]; + 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]; + } } } } @@ -121,36 +232,38 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) } #define OFFSET(x) offsetof(DrawBoxContext, x) -#define FLAGS AV_OPT_FLAG_VIDEO_PARAM -static const AVOption options[] = { - { "x", "Horizontal position of the left box edge", OFFSET(x), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, - { "y", "Vertical position of the top box edge", OFFSET(y), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, - { "width", "Width of the box", OFFSET(w_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, - { "height", "Height of the box", OFFSET(h_opt), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, - { "color", "Color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS }, - { NULL }, -}; +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM -static const AVClass drawbox_class = { - .class_name = "drawbox", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, +#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 } }; -static const AVFilterPad avfilter_vf_drawbox_inputs[] = { +AVFILTER_DEFINE_CLASS(drawbox); + +static const AVFilterPad drawbox_inputs[] = { { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - .config_props = config_input, - .get_video_buffer = ff_null_get_video_buffer, - .filter_frame = filter_frame, - .needs_writable = 1, + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + .filter_frame = filter_frame, + .needs_writable = 1, }, { NULL } }; -static const AVFilterPad avfilter_vf_drawbox_outputs[] = { +static const AVFilterPad drawbox_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, @@ -159,13 +272,121 @@ static const AVFilterPad avfilter_vf_drawbox_outputs[] = { }; 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 = avfilter_vf_drawbox_inputs, - .outputs = avfilter_vf_drawbox_outputs, + .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 */ |