#include <time.h>
#include "libavutil/colorspace.h"
+#include "libavutil/common.h"
#include "libavutil/file.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/mathematics.h"
+#include "libavutil/random_seed.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/tree.h"
+#include "libavutil/lfg.h"
#include "avfilter.h"
#include "drawutils.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
#undef time
#include FT_FREETYPE_H
#include FT_GLYPH_H
-static const char *var_names[] = {
+static const char *const var_names[] = {
"E",
"PHI",
"PI",
NULL
};
+static const char *const fun2_names[] = {
+ "rand"
+};
+
+static double drand(void *opaque, double min, double max)
+{
+ return min + (max-min) / UINT_MAX * av_lfg_get(opaque);
+}
+
+typedef double (*eval_func2)(void *, double a, double b);
+
+static const eval_func2 fun2[] = {
+ drand,
+ NULL
+};
+
enum var_name {
VAR_E,
VAR_PHI,
short int draw_box; ///< draw box around text - true or false
int use_kerning; ///< font kerning is used - true/false
int tabsize; ///< tab size
+ int fix_bounds; ///< do we let it go out of frame bounds - t/f
FT_Library library; ///< freetype font library handle
FT_Face face; ///< freetype font face handle
char *d_expr;
AVExpr *d_pexpr;
int draw; ///< set to zero to prevent drawing
+ AVLFG prng; ///< random
} DrawTextContext;
#define OFFSET(x) offsetof(DrawTextContext, x)
{"fontcolor","set foreground color", OFFSET(fontcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
{"boxcolor", "set box color", OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
{"shadowcolor", "set shadow color", OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
-{"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
-{"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.dbl=16}, 1, 72 },
+{"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
+{"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.i64=16}, 1, 72 },
{"x", "set x", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX },
{"y", "set y", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX },
-{"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX },
-{"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.dbl=0}, INT_MIN, INT_MAX },
-{"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.dbl=4}, 0, INT_MAX },
+{"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX },
+{"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX },
+{"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX },
{"draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX },
+{"fix_bounds", "if true, check and fix text coords to avoid clipping",
+ OFFSET(fix_bounds), AV_OPT_TYPE_INT, {.i64=1}, 0, 1 },
/* FT_LOAD_* flags */
-{"ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, {.dbl=FT_LOAD_DEFAULT|FT_LOAD_RENDER}, 0, INT_MAX, 0, "ft_load_flags" },
-{"default", "set default", 0, AV_OPT_TYPE_CONST, {FT_LOAD_DEFAULT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_scale", "set no_scale", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_SCALE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_hinting", "set no_hinting", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_HINTING}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"render", "set render", 0, AV_OPT_TYPE_CONST, {FT_LOAD_RENDER}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_bitmap", "set no_bitmap", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"vertical_layout", "set vertical_layout", 0, AV_OPT_TYPE_CONST, {FT_LOAD_VERTICAL_LAYOUT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"force_autohint", "set force_autohint", 0, AV_OPT_TYPE_CONST, {FT_LOAD_FORCE_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"crop_bitmap", "set crop_bitmap", 0, AV_OPT_TYPE_CONST, {FT_LOAD_CROP_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"pedantic", "set pedantic", 0, AV_OPT_TYPE_CONST, {FT_LOAD_PEDANTIC}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_global_advance_width", "set ignore_global_advance_width", 0, AV_OPT_TYPE_CONST, {FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_recurse", "set no_recurse", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_RECURSE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_transform", "set ignore_transform", 0, AV_OPT_TYPE_CONST, {FT_LOAD_IGNORE_TRANSFORM}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"monochrome", "set monochrome", 0, AV_OPT_TYPE_CONST, {FT_LOAD_MONOCHROME}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"linear_design", "set linear_design", 0, AV_OPT_TYPE_CONST, {FT_LOAD_LINEAR_DESIGN}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_autohint", "set no_autohint", 0, AV_OPT_TYPE_CONST, {FT_LOAD_NO_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, {.i64=FT_LOAD_DEFAULT|FT_LOAD_RENDER}, 0, INT_MAX, 0, "ft_load_flags" },
+{"default", "set default", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_DEFAULT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_scale", "set no_scale", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_NO_SCALE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_hinting", "set no_hinting", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_NO_HINTING}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"render", "set render", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_RENDER}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_bitmap", "set no_bitmap", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_NO_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"vertical_layout", "set vertical_layout", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_VERTICAL_LAYOUT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"force_autohint", "set force_autohint", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_FORCE_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"crop_bitmap", "set crop_bitmap", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_CROP_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"pedantic", "set pedantic", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_PEDANTIC}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ignore_global_advance_width", "set ignore_global_advance_width", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_recurse", "set no_recurse", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_NO_RECURSE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ignore_transform", "set ignore_transform", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_IGNORE_TRANSFORM}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"monochrome", "set monochrome", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_MONOCHROME}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"linear_design", "set linear_design", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_LINEAR_DESIGN}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_autohint", "set no_autohint", 0, AV_OPT_TYPE_CONST, {.i64 = FT_LOAD_NO_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
{NULL},
};
return ret;
}
-static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+static av_cold int init(AVFilterContext *ctx, const char *args)
{
int err;
DrawTextContext *dtext = ctx->priv;
PIX_FMT_NONE
};
- avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static inline int is_newline(uint32_t c)
{
- return (c == '\n' || c == '\r' || c == '\f' || c == '\v');
+ return c == '\n' || c == '\r' || c == '\f' || c == '\v';
}
static int dtext_prepare_text(AVFilterContext *ctx)
/* get glyph */
dummy.code = code;
glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
- if (!glyph)
+ if (!glyph) {
ret = load_glyph(ctx, &glyph, code);
- if (ret) return ret;
+ if (ret)
+ return ret;
+ }
y_min = FFMIN(glyph->bbox.yMin, y_min);
y_max = FFMAX(glyph->bbox.yMax, y_max);
y = FFMIN(y + text_height, height - 1);
dtext->w = str_w;
+ dtext->var_values[VAR_TEXT_W] = dtext->var_values[VAR_TW] = dtext->w;
dtext->h = y;
+ dtext->var_values[VAR_TEXT_H] = dtext->var_values[VAR_TH] = dtext->h;
return 0;
}
dtext->var_values[VAR_N] = 0;
dtext->var_values[VAR_T] = NAN;
+ av_lfg_init(&dtext->prng, av_get_random_seed());
if ((ret = av_expr_parse(&dtext->x_pexpr, dtext->x_expr, var_names,
- NULL, NULL, NULL, NULL, 0, ctx)) < 0 ||
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
(ret = av_expr_parse(&dtext->y_pexpr, dtext->y_expr, var_names,
- NULL, NULL, NULL, NULL, 0, ctx)) < 0 ||
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
(ret = av_expr_parse(&dtext->d_pexpr, dtext->d_expr, var_names,
- NULL, NULL, NULL, NULL, 0, ctx)) < 0)
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0)
return AVERROR(EINVAL);
if ((ret =
return 0;
}
-static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
+static int null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
+{
+ return 0;
+}
static inline int normalize_double(int *n, double d)
{
return ret;
}
-static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
+static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
{
AVFilterContext *ctx = inlink->dst;
DrawTextContext *dtext = ctx->priv;
- int fail = 0;
+ AVFilterBufferRef *buf_out;
+ int ret = 0;
- if (dtext_prepare_text(ctx) < 0) {
+ if ((ret = dtext_prepare_text(ctx)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Can't draw text\n");
- fail = 1;
+ return ret;
}
dtext->var_values[VAR_T] = inpicref->pts == AV_NOPTS_VALUE ?
NAN : inpicref->pts * av_q2d(inlink->time_base);
dtext->var_values[VAR_X] =
- av_expr_eval(dtext->x_pexpr, dtext->var_values, NULL);
+ av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng);
dtext->var_values[VAR_Y] =
- av_expr_eval(dtext->y_pexpr, dtext->var_values, NULL);
+ av_expr_eval(dtext->y_pexpr, dtext->var_values, &dtext->prng);
dtext->var_values[VAR_X] =
- av_expr_eval(dtext->x_pexpr, dtext->var_values, NULL);
+ av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng);
- dtext->draw = fail ? 0 :
- av_expr_eval(dtext->d_pexpr, dtext->var_values, NULL);
+ dtext->draw = av_expr_eval(dtext->d_pexpr, dtext->var_values, &dtext->prng);
normalize_double(&dtext->x, dtext->var_values[VAR_X]);
normalize_double(&dtext->y, dtext->var_values[VAR_Y]);
- if (dtext->x < 0) dtext->x = 0;
- if (dtext->y < 0) dtext->y = 0;
- if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w)
- dtext->x = inlink->w - dtext->w;
- if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h)
- dtext->y = inlink->h - dtext->h;
+ if (dtext->fix_bounds) {
+ if (dtext->x < 0) dtext->x = 0;
+ if (dtext->y < 0) dtext->y = 0;
+ if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w)
+ dtext->x = inlink->w - dtext->w;
+ if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h)
+ dtext->y = inlink->h - dtext->h;
+ }
dtext->x &= ~((1 << dtext->hsub) - 1);
dtext->y &= ~((1 << dtext->vsub) - 1);
(int)dtext->var_values[VAR_N], dtext->var_values[VAR_T],
dtext->x, dtext->y, dtext->x+dtext->w, dtext->y+dtext->h);
- avfilter_start_frame(inlink->dst->outputs[0], inpicref);
+ buf_out = avfilter_ref_buffer(inpicref, ~0);
+ if (!buf_out)
+ return AVERROR(ENOMEM);
+
+ return ff_start_frame(inlink->dst->outputs[0], buf_out);
}
-static void end_frame(AVFilterLink *inlink)
+static int end_frame(AVFilterLink *inlink)
{
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFilterBufferRef *picref = inlink->cur_buf;
DrawTextContext *dtext = inlink->dst->priv;
+ int ret;
if (dtext->draw)
draw_text(inlink->dst, picref, picref->video->w, picref->video->h);
dtext->var_values[VAR_N] += 1.0;
- avfilter_draw_slice(outlink, 0, picref->video->h, 1);
- avfilter_end_frame(outlink);
+ if ((ret = ff_draw_slice(outlink, 0, picref->video->h, 1)) < 0 ||
+ (ret = ff_end_frame(outlink)) < 0)
+ return ret;
+ return 0;
}
AVFilter avfilter_vf_drawtext = {
.uninit = uninit,
.query_formats = query_formats,
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .get_video_buffer = avfilter_null_get_video_buffer,
- .start_frame = start_frame,
- .draw_slice = null_draw_slice,
- .end_frame = end_frame,
- .config_props = config_input,
- .min_perms = AV_PERM_WRITE |
- AV_PERM_READ,
- .rej_perms = AV_PERM_PRESERVE },
- { .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO, },
- { .name = NULL}},
+ .inputs = (const AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = ff_null_get_video_buffer,
+ .start_frame = start_frame,
+ .draw_slice = null_draw_slice,
+ .end_frame = end_frame,
+ .config_props = config_input,
+ .min_perms = AV_PERM_WRITE |
+ AV_PERM_READ,
+ .rej_perms = AV_PERM_PRESERVE },
+ { .name = NULL}},
+ .outputs = (const AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO, },
+ { .name = NULL}},
};
projects / ffmpeg / blobdiff