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-rw-r--r--libavfilter/vf_drawbox.c347
1 files changed, 288 insertions, 59 deletions
diff --git a/libavfilter/vf_drawbox.c b/libavfilter/vf_drawbox.c
index ab14af2e12..35a08e8f2e 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"
@@ -34,62 +36,172 @@
#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_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,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_NONE
};
-
- ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
- return 0;
+ 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)
{
- 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 */
+ 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;
- 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,
+ /* 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)
@@ -105,14 +217,21 @@ 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 +240,38 @@ 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
+
+#if CONFIG_DRAWBOX_FILTER
-static const AVClass drawbox_class = {
- .class_name = "drawbox",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
+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 +280,121 @@ 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 */
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