562 lines
21 KiB
C
562 lines
21 KiB
C
/*
|
|
* 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 "config_components.h"
|
|
|
|
#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 "libavutil/detection_bbox.h"
|
|
#include "avfilter.h"
|
|
#include "drawutils.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",
|
|
"fill",
|
|
NULL
|
|
};
|
|
|
|
enum { Y, U, V, A };
|
|
enum { R, G, B };
|
|
|
|
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
|
|
};
|
|
|
|
struct DrawBoxContext;
|
|
|
|
typedef int (*PixelBelongsToRegion)(struct DrawBoxContext *s, int x, int y);
|
|
|
|
typedef struct DrawBoxContext {
|
|
const AVClass *class;
|
|
int x, y, w, h;
|
|
int thickness;
|
|
char *color_str;
|
|
uint8_t rgba_map[4];
|
|
uint8_t rgba_color[4];
|
|
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
|
|
char *box_source_string; ///< string for box data source
|
|
int have_alpha;
|
|
int replace;
|
|
int step;
|
|
enum AVFrameSideDataType box_source;
|
|
|
|
void (*draw_region)(AVFrame *frame, struct DrawBoxContext *ctx, int left, int top, int right, int down,
|
|
PixelBelongsToRegion pixel_belongs_to_region);
|
|
} DrawBoxContext;
|
|
|
|
static const int NUM_EXPR_EVALS = 5;
|
|
|
|
#define ASSIGN_THREE_CHANNELS \
|
|
row[0] = frame->data[0] + y * frame->linesize[0]; \
|
|
row[1] = frame->data[1] + (y >> ctx->vsub) * frame->linesize[1]; \
|
|
row[2] = frame->data[2] + (y >> ctx->vsub) * frame->linesize[2];
|
|
|
|
#define ASSIGN_FOUR_CHANNELS \
|
|
ASSIGN_THREE_CHANNELS \
|
|
row[3] = frame->data[3] + y * frame->linesize[3];
|
|
|
|
static void draw_region(AVFrame *frame, DrawBoxContext *ctx, int left, int top, int right, int down,
|
|
PixelBelongsToRegion pixel_belongs_to_region)
|
|
{
|
|
unsigned char *row[4];
|
|
int x, y;
|
|
if (ctx->have_alpha && ctx->replace) {
|
|
for (y = top; y < down; y++) {
|
|
ASSIGN_FOUR_CHANNELS
|
|
if (ctx->invert_color) {
|
|
for (x = left; x < right; x++)
|
|
if (pixel_belongs_to_region(ctx, x, y))
|
|
row[0][x] = 0xff - row[0][x];
|
|
} else {
|
|
for (x = left; x < right; x++) {
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x ] = ctx->yuv_color[Y];
|
|
row[1][x >> ctx->hsub] = ctx->yuv_color[U];
|
|
row[2][x >> ctx->hsub] = ctx->yuv_color[V];
|
|
row[3][x ] = ctx->yuv_color[A];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (y = top; y < down; y++) {
|
|
ASSIGN_THREE_CHANNELS
|
|
if (ctx->invert_color) {
|
|
for (x = left; x < right; x++)
|
|
if (pixel_belongs_to_region(ctx, x, y))
|
|
row[0][x] = 0xff - row[0][x];
|
|
} else {
|
|
for (x = left; x < right; x++) {
|
|
double alpha = (double)ctx->yuv_color[A] / 255;
|
|
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x ] = (1 - alpha) * row[0][x ] + alpha * ctx->yuv_color[Y];
|
|
row[1][x >> ctx->hsub] = (1 - alpha) * row[1][x >> ctx->hsub] + alpha * ctx->yuv_color[U];
|
|
row[2][x >> ctx->hsub] = (1 - alpha) * row[2][x >> ctx->hsub] + alpha * ctx->yuv_color[V];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define ASSIGN_THREE_CHANNELS_PACKED \
|
|
row[0] = frame->data[0] + y * frame->linesize[0] + ctx->rgba_map[0]; \
|
|
row[1] = frame->data[0] + y * frame->linesize[0] + ctx->rgba_map[1]; \
|
|
row[2] = frame->data[0] + y * frame->linesize[0] + ctx->rgba_map[2];
|
|
|
|
#define ASSIGN_FOUR_CHANNELS_PACKED \
|
|
ASSIGN_THREE_CHANNELS_PACKED \
|
|
row[3] = frame->data[0] + y * frame->linesize[0] + ctx->rgba_map[3];
|
|
|
|
static void draw_region_rgb_packed(AVFrame *frame, DrawBoxContext *ctx, int left, int top, int right, int down,
|
|
PixelBelongsToRegion pixel_belongs_to_region)
|
|
{
|
|
const int C = ctx->step;
|
|
uint8_t *row[4];
|
|
|
|
if (ctx->have_alpha && ctx->replace) {
|
|
for (int y = top; y < down; y++) {
|
|
ASSIGN_FOUR_CHANNELS_PACKED
|
|
if (ctx->invert_color) {
|
|
for (int x = left; x < right; x++)
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x*C] = 0xff - row[0][x*C];
|
|
row[1][x*C] = 0xff - row[1][x*C];
|
|
row[2][x*C] = 0xff - row[2][x*C];
|
|
}
|
|
} else {
|
|
for (int x = left; x < right; x++) {
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x*C] = ctx->rgba_color[R];
|
|
row[1][x*C] = ctx->rgba_color[G];
|
|
row[2][x*C] = ctx->rgba_color[B];
|
|
row[3][x*C] = ctx->rgba_color[A];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (int y = top; y < down; y++) {
|
|
ASSIGN_THREE_CHANNELS_PACKED
|
|
if (ctx->invert_color) {
|
|
for (int x = left; x < right; x++)
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x*C] = 0xff - row[0][x*C];
|
|
row[1][x*C] = 0xff - row[1][x*C];
|
|
row[2][x*C] = 0xff - row[2][x*C];
|
|
}
|
|
} else {
|
|
for (int x = left; x < right; x++) {
|
|
float alpha = (float)ctx->rgba_color[A] / 255.f;
|
|
|
|
if (pixel_belongs_to_region(ctx, x, y)) {
|
|
row[0][x*C] = (1.f - alpha) * row[0][x*C] + alpha * ctx->rgba_color[R];
|
|
row[1][x*C] = (1.f - alpha) * row[1][x*C] + alpha * ctx->rgba_color[G];
|
|
row[2][x*C] = (1.f - alpha) * row[2][x*C] + alpha * ctx->rgba_color[B];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static enum AVFrameSideDataType box_source_string_parse(const char *box_source_string)
|
|
{
|
|
av_assert0(box_source_string);
|
|
if (!strcmp(box_source_string, "side_data_detection_bboxes")) {
|
|
return AV_FRAME_DATA_DETECTION_BBOXES;
|
|
} else {
|
|
// will support side_data_regions_of_interest next
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
DrawBoxContext *s = ctx->priv;
|
|
|
|
if (s->box_source_string) {
|
|
s->box_source = box_source_string_parse(s->box_source_string);
|
|
if ((int)s->box_source < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error box source: %s\n",s->box_source_string);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
|
|
if (!strcmp(s->color_str, "invert"))
|
|
s->invert_color = 1;
|
|
else if (av_parse_color(s->rgba_color, s->color_str, -1, ctx) < 0)
|
|
return AVERROR(EINVAL);
|
|
|
|
if (!s->invert_color) {
|
|
s->yuv_color[Y] = RGB_TO_Y_CCIR(s->rgba_color[0], s->rgba_color[1], s->rgba_color[2]);
|
|
s->yuv_color[U] = RGB_TO_U_CCIR(s->rgba_color[0], s->rgba_color[1], s->rgba_color[2], 0);
|
|
s->yuv_color[V] = RGB_TO_V_CCIR(s->rgba_color[0], s->rgba_color[1], s->rgba_color[2], 0);
|
|
s->yuv_color[A] = s->rgba_color[3];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
|
|
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
|
|
AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
|
|
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
|
|
AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
|
|
AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
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;
|
|
|
|
ff_fill_rgba_map(s->rgba_map, inlink->format);
|
|
|
|
if (!(desc->flags & AV_PIX_FMT_FLAG_RGB))
|
|
s->draw_region = draw_region;
|
|
else
|
|
s->draw_region = draw_region_rgb_packed;
|
|
|
|
s->step = av_get_padded_bits_per_pixel(desc) >> 3;
|
|
s->hsub = desc->log2_chroma_w;
|
|
s->vsub = desc->log2_chroma_h;
|
|
s->have_alpha = desc->flags & AV_PIX_FMT_FLAG_ALPHA;
|
|
|
|
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 av_pure av_always_inline int pixel_belongs_to_box(DrawBoxContext *s, int x, int y)
|
|
{
|
|
return (y - s->y < s->thickness) || (s->y + s->h - 1 - y < s->thickness) ||
|
|
(x - s->x < s->thickness) || (s->x + s->w - 1 - x < s->thickness);
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
|
|
{
|
|
DrawBoxContext *s = inlink->dst->priv;
|
|
const AVDetectionBBoxHeader *header = NULL;
|
|
const AVDetectionBBox *bbox;
|
|
AVFrameSideData *sd;
|
|
int loop = 1;
|
|
|
|
if (s->box_source == AV_FRAME_DATA_DETECTION_BBOXES) {
|
|
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DETECTION_BBOXES);
|
|
if (sd) {
|
|
header = (AVDetectionBBoxHeader *)sd->data;
|
|
loop = header->nb_bboxes;
|
|
} else {
|
|
av_log(s, AV_LOG_WARNING, "No detection bboxes.\n");
|
|
return ff_filter_frame(inlink->dst->outputs[0], frame);
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < loop; i++) {
|
|
if (header) {
|
|
bbox = av_get_detection_bbox(header, i);
|
|
s->y = bbox->y;
|
|
s->x = bbox->x;
|
|
s->h = bbox->h;
|
|
s->w = bbox->w;
|
|
}
|
|
|
|
s->draw_region(frame, s, FFMAX(s->x, 0), FFMAX(s->y, 0), FFMIN(s->x + s->w, frame->width),
|
|
FFMIN(s->y + s->h, frame->height), pixel_belongs_to_box);
|
|
}
|
|
|
|
return ff_filter_frame(inlink->dst->outputs[0], frame);
|
|
}
|
|
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
|
|
{
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
DrawBoxContext *s = ctx->priv;
|
|
int old_x = s->x;
|
|
int old_y = s->y;
|
|
int old_w = s->w;
|
|
int old_h = s->h;
|
|
int old_t = s->thickness;
|
|
int old_r = s->replace;
|
|
int ret;
|
|
|
|
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = init(ctx);
|
|
if (ret < 0)
|
|
goto end;
|
|
ret = config_input(inlink);
|
|
end:
|
|
if (ret < 0) {
|
|
s->x = old_x;
|
|
s->y = old_y;
|
|
s->w = old_w;
|
|
s->h = old_h;
|
|
s->thickness = old_t;
|
|
s->replace = old_r;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(DrawBoxContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_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" }, 0, 0, FLAGS },
|
|
{ "y", "set vertical position of the top box edge", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "width", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "w", "set width of the box", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "height", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "h", "set height of the box", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "color", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
|
|
{ "c", "set color of the box", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
|
|
{ "thickness", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, 0, 0, FLAGS },
|
|
{ "t", "set the box thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, { .str="3" }, 0, 0, FLAGS },
|
|
{ "replace", "replace color & alpha", OFFSET(replace), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, FLAGS },
|
|
{ "box_source", "use datas from bounding box in side data", OFFSET(box_source_string), AV_OPT_TYPE_STRING, { .str=NULL }, 0, 1, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(drawbox);
|
|
|
|
static const AVFilterPad drawbox_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
|
|
.config_props = config_input,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
const 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,
|
|
FILTER_INPUTS(drawbox_inputs),
|
|
FILTER_OUTPUTS(ff_video_default_filterpad),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.process_command = process_command,
|
|
.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;
|
|
|
|
drawgrid->draw_region(frame, drawgrid, 0, 0, frame->width, frame->height, pixel_belongs_to_grid);
|
|
|
|
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" }, 0, 0, FLAGS },
|
|
{ "y", "set vertical offset", OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "width", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "w", "set width of grid cell", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "height", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "h", "set height of grid cell", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str="0" }, 0, 0, FLAGS },
|
|
{ "color", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
|
|
{ "c", "set color of the grid", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, 0, 0, FLAGS },
|
|
{ "thickness", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, 0, 0, FLAGS },
|
|
{ "t", "set grid line thickness", OFFSET(t_expr), AV_OPT_TYPE_STRING, {.str="1"}, 0, 0, FLAGS },
|
|
{ "replace", "replace color & alpha", OFFSET(replace), AV_OPT_TYPE_BOOL, { .i64=0 }, 0, 1, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(drawgrid);
|
|
|
|
static const AVFilterPad drawgrid_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
|
|
.config_props = config_input,
|
|
.filter_frame = drawgrid_filter_frame,
|
|
},
|
|
};
|
|
|
|
const 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,
|
|
FILTER_INPUTS(drawgrid_inputs),
|
|
FILTER_OUTPUTS(ff_video_default_filterpad),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
|
.process_command = process_command,
|
|
};
|
|
|
|
#endif /* CONFIG_DRAWGRID_FILTER */
|