* Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
* Copyright (c) 2003 Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
- * drawtext filter, based on the original FFmpeg vhook/drawtext.c
+ * drawtext filter, based on the original vhook/drawtext.c
* filter by Gustavo Sverzut Barbieri
*/
#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 *const var_names[] = {
+ "E",
+ "PHI",
+ "PI",
+ "main_w", "W", ///< width of the main video
+ "main_h", "H", ///< height of the main video
+ "text_w", "w", ///< width of the overlay text
+ "text_h", "h", ///< height of the overlay text
+ "x",
+ "y",
+ "n", ///< number of processed frames
+ "t", ///< timestamp expressed in seconds
+ 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,
+ VAR_PI,
+ VAR_MAIN_W, VAR_MW,
+ VAR_MAIN_H, VAR_MH,
+ VAR_TEXT_W, VAR_TW,
+ VAR_TEXT_H, VAR_TH,
+ VAR_X,
+ VAR_Y,
+ VAR_N,
+ VAR_T,
+ VAR_VARS_NB
+};
+
typedef struct {
const AVClass *class;
uint8_t *fontfile; ///< font to be used
uint8_t *text; ///< text to be drawn
- uint8_t *text_priv; ///< used to detect whether text changed
+ uint8_t *expanded_text; ///< used to contain the strftime()-expanded text
+ size_t expanded_text_size; ///< size in bytes of the expanded_text buffer
int ft_load_flags; ///< flags used for loading fonts, see FT_LOAD_*
FT_Vector *positions; ///< positions for each element in the text
+ size_t nb_positions; ///< number of elements of positions array
char *textfile; ///< file with text to be drawn
- unsigned int x; ///< x position to start drawing text
- unsigned int y; ///< y position to start drawing text
+ int x, y; ///< position to start drawing text
+ int w, h; ///< dimension of the text block
+ int shadowx, shadowy;
unsigned int fontsize; ///< font size to use
char *fontcolor_string; ///< font color as string
char *boxcolor_string; ///< box color as string
+ char *shadowcolor_string; ///< shadow color as string
uint8_t fontcolor[4]; ///< foreground color
uint8_t boxcolor[4]; ///< background color
+ uint8_t shadowcolor[4]; ///< shadow color
uint8_t fontcolor_rgba[4]; ///< foreground color in RGBA
uint8_t boxcolor_rgba[4]; ///< background color in RGBA
+ uint8_t shadowcolor_rgba[4]; ///< shadow color in RGBA
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
int pixel_step[4]; ///< distance in bytes between the component of each pixel
uint8_t rgba_map[4]; ///< map RGBA offsets to the positions in the packed RGBA format
uint8_t *box_line[4]; ///< line used for filling the box background
+ char *x_expr, *y_expr;
+ AVExpr *x_pexpr, *y_pexpr; ///< parsed expressions for x and y
+ double var_values[VAR_VARS_NB];
+ char *d_expr;
+ AVExpr *d_pexpr;
+ int draw; ///< set to zero to prevent drawing
+ AVLFG prng; ///< random
} DrawTextContext;
#define OFFSET(x) offsetof(DrawTextContext, x)
static const AVOption drawtext_options[]= {
-{"fontfile", "set font file", OFFSET(fontfile), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
-{"text", "set text", OFFSET(text), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
-{"textfile", "set text file", OFFSET(textfile), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
-{"fontcolor","set foreground color", OFFSET(fontcolor_string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
-{"boxcolor", "set box color", OFFSET(boxcolor_string), FF_OPT_TYPE_STRING, 0, CHAR_MIN, CHAR_MAX },
-{"box", "set box", OFFSET(draw_box), FF_OPT_TYPE_INT, 0, 0, 1 },
-{"fontsize", "set font size", OFFSET(fontsize), FF_OPT_TYPE_INT, 16, 1, 72 },
-{"x", "set x", OFFSET(x), FF_OPT_TYPE_INT, 0, 0, INT_MAX },
-{"y", "set y", OFFSET(y), FF_OPT_TYPE_INT, 0, 0, INT_MAX },
-{"tabsize", "set tab size", OFFSET(tabsize), FF_OPT_TYPE_INT, 4, 0, INT_MAX },
+{"fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+{"text", "set text", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+{"textfile", "set text file", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+{"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, {.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, {.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), FF_OPT_TYPE_FLAGS, FT_LOAD_DEFAULT|FT_LOAD_RENDER, 0, INT_MAX, 0, "ft_load_flags" },
-{"default", "set default", 0, FF_OPT_TYPE_CONST, FT_LOAD_DEFAULT, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_scale", "set no_scale", 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_SCALE, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_hinting", "set no_hinting", 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_HINTING, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"render", "set render", 0, FF_OPT_TYPE_CONST, FT_LOAD_RENDER, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_bitmap", "set no_bitmap", 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_BITMAP, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"vertical_layout", "set vertical_layout", 0, FF_OPT_TYPE_CONST, FT_LOAD_VERTICAL_LAYOUT, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"force_autohint", "set force_autohint", 0, FF_OPT_TYPE_CONST, FT_LOAD_FORCE_AUTOHINT, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"crop_bitmap", "set crop_bitmap", 0, FF_OPT_TYPE_CONST, FT_LOAD_CROP_BITMAP, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"pedantic", "set pedantic", 0, FF_OPT_TYPE_CONST, FT_LOAD_PEDANTIC, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_global_advance_width", "set ignore_global_advance_width", 0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_recurse", "set no_recurse", 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_RECURSE, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_transform", "set ignore_transform", 0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_TRANSFORM, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"monochrome", "set monochrome", 0, FF_OPT_TYPE_CONST, FT_LOAD_MONOCHROME, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"linear_design", "set linear_design", 0, FF_OPT_TYPE_CONST, FT_LOAD_LINEAR_DESIGN, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_autohint", "set no_autohint", 0, FF_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;
Glyph *glyph;
dtext->class = &drawtext_class;
- av_opt_set_defaults2(dtext, 0, 0);
+ av_opt_set_defaults(dtext);
dtext->fontcolor_string = av_strdup("black");
dtext->boxcolor_string = av_strdup("white");
+ dtext->shadowcolor_string = av_strdup("black");
if ((err = (av_set_options_string(dtext, args, "=", ":"))) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
return err;
}
+ if ((err = av_parse_color(dtext->shadowcolor_rgba, dtext->shadowcolor_string, -1, ctx))) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Invalid shadow color '%s'\n", dtext->shadowcolor_string);
+ return err;
+ }
+
if ((err = FT_Init_FreeType(&(dtext->library)))) {
av_log(ctx, AV_LOG_ERROR,
"Could not load FreeType: %s\n", FT_ERRMSG(err));
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;
}
av_freep(&dtext->fontfile);
av_freep(&dtext->text);
+ av_freep(&dtext->expanded_text);
av_freep(&dtext->fontcolor_string);
av_freep(&dtext->boxcolor_string);
av_freep(&dtext->positions);
+ av_freep(&dtext->shadowcolor_string);
av_tree_enumerate(dtext->glyphs, NULL, NULL, glyph_enu_free);
av_tree_destroy(dtext->glyphs);
dtext->glyphs = 0;
}
+static inline int is_newline(uint32_t c)
+{
+ return c == '\n' || c == '\r' || c == '\f' || c == '\v';
+}
+
+static int dtext_prepare_text(AVFilterContext *ctx)
+{
+ DrawTextContext *dtext = ctx->priv;
+ uint32_t code = 0, prev_code = 0;
+ int x = 0, y = 0, i = 0, ret;
+ int text_height, baseline;
+ char *text = dtext->text;
+ uint8_t *p;
+ int str_w = 0, len;
+ int y_min = 32000, y_max = -32000;
+ FT_Vector delta;
+ Glyph *glyph = NULL, *prev_glyph = NULL;
+ Glyph dummy = { 0 };
+ int width = ctx->inputs[0]->w;
+ int height = ctx->inputs[0]->h;
+
+#if HAVE_LOCALTIME_R
+ time_t now = time(0);
+ struct tm ltime;
+ uint8_t *buf = dtext->expanded_text;
+ int buf_size = dtext->expanded_text_size;
+
+ if (!buf)
+ buf_size = 2*strlen(dtext->text)+1;
+
+ localtime_r(&now, <ime);
+
+ while ((buf = av_realloc(buf, buf_size))) {
+ *buf = 1;
+ if (strftime(buf, buf_size, dtext->text, <ime) != 0 || *buf == 0)
+ break;
+ buf_size *= 2;
+ }
+
+ if (!buf)
+ return AVERROR(ENOMEM);
+ text = dtext->expanded_text = buf;
+ dtext->expanded_text_size = buf_size;
+#endif
+
+ if ((len = strlen(text)) > dtext->nb_positions) {
+ FT_Vector *p = av_realloc(dtext->positions,
+ len * sizeof(*dtext->positions));
+ if (!p) {
+ av_freep(dtext->positions);
+ dtext->nb_positions = 0;
+ return AVERROR(ENOMEM);
+ } else {
+ dtext->positions = p;
+ dtext->nb_positions = len;
+ }
+ }
+
+ /* load and cache glyphs */
+ for (i = 0, p = text; *p; i++) {
+ GET_UTF8(code, *p++, continue;);
+
+ /* get glyph */
+ dummy.code = code;
+ glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
+ if (!glyph) {
+ ret = load_glyph(ctx, &glyph, code);
+ if (ret)
+ return ret;
+ }
+
+ y_min = FFMIN(glyph->bbox.yMin, y_min);
+ y_max = FFMAX(glyph->bbox.yMax, y_max);
+ }
+ text_height = y_max - y_min;
+ baseline = y_max;
+
+ /* compute and save position for each glyph */
+ glyph = NULL;
+ for (i = 0, p = text; *p; i++) {
+ GET_UTF8(code, *p++, continue;);
+
+ /* skip the \n in the sequence \r\n */
+ if (prev_code == '\r' && code == '\n')
+ continue;
+
+ prev_code = code;
+ if (is_newline(code)) {
+ str_w = FFMAX(str_w, x - dtext->x);
+ y += text_height;
+ x = 0;
+ continue;
+ }
+
+ /* get glyph */
+ prev_glyph = glyph;
+ dummy.code = code;
+ glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
+
+ /* kerning */
+ if (dtext->use_kerning && prev_glyph && glyph->code) {
+ FT_Get_Kerning(dtext->face, prev_glyph->code, glyph->code,
+ ft_kerning_default, &delta);
+ x += delta.x >> 6;
+ }
+
+ if (x + glyph->bbox.xMax >= width) {
+ str_w = FFMAX(str_w, x);
+ y += text_height;
+ x = 0;
+ }
+
+ /* save position */
+ dtext->positions[i].x = x + glyph->bitmap_left;
+ dtext->positions[i].y = y - glyph->bitmap_top + baseline;
+ if (code == '\t') x = (x / dtext->tabsize + 1)*dtext->tabsize;
+ else x += glyph->advance;
+ }
+
+ str_w = FFMIN(width - 1, FFMAX(str_w, x));
+ 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;
+}
+
+
static int config_input(AVFilterLink *inlink)
{
- DrawTextContext *dtext = inlink->dst->priv;
+ AVFilterContext *ctx = inlink->dst;
+ DrawTextContext *dtext = ctx->priv;
const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];
int ret;
dtext->hsub = pix_desc->log2_chroma_w;
dtext->vsub = pix_desc->log2_chroma_h;
+ dtext->var_values[VAR_E ] = M_E;
+ dtext->var_values[VAR_PHI] = M_PHI;
+ dtext->var_values[VAR_PI ] = M_PI;
+
+ dtext->var_values[VAR_MAIN_W] =
+ dtext->var_values[VAR_MW] = ctx->inputs[0]->w;
+ dtext->var_values[VAR_MAIN_H] =
+ dtext->var_values[VAR_MH] = ctx->inputs[0]->h;
+
+ dtext->var_values[VAR_X] = 0;
+ dtext->var_values[VAR_Y] = 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, fun2_names, fun2, 0, ctx)) < 0 ||
+ (ret = av_expr_parse(&dtext->y_pexpr, dtext->y_expr, var_names,
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
+ (ret = av_expr_parse(&dtext->d_pexpr, dtext->d_expr, var_names,
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0)
+ return AVERROR(EINVAL);
+
if ((ret =
ff_fill_line_with_color(dtext->box_line, dtext->pixel_step,
inlink->w, dtext->boxcolor,
dtext->fontcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
dtext->fontcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
dtext->fontcolor[3] = rgba[3];
+ rgba = dtext->shadowcolor_rgba;
+ dtext->shadowcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
+ dtext->shadowcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
+ dtext->shadowcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
+ dtext->shadowcolor[3] = rgba[3];
}
- return 0;
+ dtext->draw = 1;
+
+ return dtext_prepare_text(ctx);
}
#define GET_BITMAP_VAL(r, c) \
#define SET_PIXEL_YUV(picref, yuva_color, val, x, y, hsub, vsub) { \
luma_pos = ((x) ) + ((y) ) * picref->linesize[0]; \
- chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[1]; \
- chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \
alpha = yuva_color[3] * (val) * 129; \
picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255*255*129 - alpha) * picref->data[0][luma_pos] ) >> 23; \
- picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255*255*129 - alpha) * picref->data[1][chroma_pos1]) >> 23; \
- picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255*255*129 - alpha) * picref->data[2][chroma_pos2]) >> 23; \
+ if (((x) & ((1<<(hsub)) - 1)) == 0 && ((y) & ((1<<(vsub)) - 1)) == 0) {\
+ chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[1]; \
+ chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \
+ picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255*255*129 - alpha) * picref->data[1][chroma_pos1]) >> 23; \
+ picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255*255*129 - alpha) * picref->data[2][chroma_pos2]) >> 23; \
+ }\
}
static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x,
{
int r, c, alpha;
unsigned int luma_pos, chroma_pos1, chroma_pos2;
- uint8_t src_val, dst_pixel[4];
+ uint8_t src_val;
for (r = 0; r < bitmap->rows && r+y < height; r++) {
for (c = 0; c < bitmap->width && c+x < width; c++) {
- /* get pixel in the picref (destination) */
- dst_pixel[0] = picref->data[0][ c+x + (y+r) * picref->linesize[0]];
- dst_pixel[1] = picref->data[1][((c+x) >> hsub) + ((y+r) >> vsub) * picref->linesize[1]];
- dst_pixel[2] = picref->data[2][((c+x) >> hsub) + ((y+r) >> vsub) * picref->linesize[2]];
-
/* get intensity value in the glyph bitmap (source) */
src_val = GET_BITMAP_VAL(r, c);
if (!src_val)
{
int r, c, alpha;
uint8_t *p;
- uint8_t src_val, dst_pixel[4];
+ uint8_t src_val;
for (r = 0; r < bitmap->rows && r+y < height; r++) {
for (c = 0; c < bitmap->width && c+x < width; c++) {
- /* get pixel in the picref (destination) */
- dst_pixel[0] = picref->data[0][(c+x + rgba_map[0]) * pixel_step +
- (y+r) * picref->linesize[0]];
- dst_pixel[1] = picref->data[0][(c+x + rgba_map[1]) * pixel_step +
- (y+r) * picref->linesize[0]];
- dst_pixel[2] = picref->data[0][(c+x + rgba_map[2]) * pixel_step +
- (y+r) * picref->linesize[0]];
-
/* get intensity value in the glyph bitmap (source) */
src_val = GET_BITMAP_VAL(r, c);
if (!src_val)
}
}
-static inline int is_newline(uint32_t c)
-{
- return (c == '\n' || c == '\r' || c == '\f' || c == '\v');
-}
-
-static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,
- int width, int height)
+static int draw_glyphs(DrawTextContext *dtext, AVFilterBufferRef *picref,
+ int width, int height, const uint8_t rgbcolor[4], const uint8_t yuvcolor[4], int x, int y)
{
- DrawTextContext *dtext = ctx->priv;
- uint32_t code = 0, prev_code = 0;
- int x = 0, y = 0, i = 0;
- int text_height, baseline;
+ char *text = HAVE_LOCALTIME_R ? dtext->expanded_text : dtext->text;
+ uint32_t code = 0;
+ int i;
uint8_t *p;
- int str_w = 0;
- int y_min = 32000, y_max = -32000;
- FT_Vector delta;
- Glyph *glyph = NULL, *prev_glyph = NULL;
- Glyph dummy = { 0 };
-
- if (dtext->text != dtext->text_priv) {
-#if HAVE_LOCALTIME_R
- time_t now = time(0);
- struct tm ltime;
- uint8_t *buf = NULL;
- int buflen = 2*strlen(dtext->text) + 1, len;
-
- localtime_r(&now, <ime);
-
- while ((buf = av_realloc(buf, buflen))) {
- *buf = 1;
- if ((len = strftime(buf, buflen, dtext->text, <ime)) != 0 || *buf == 0)
- break;
- buflen *= 2;
- }
- if (!buf)
- return AVERROR(ENOMEM);
- av_freep(&dtext->text);
- dtext->text = dtext->text_priv = buf;
-#else
- dtext->text_priv = dtext->text;
-#endif
- if (!(dtext->positions = av_realloc(dtext->positions,
- strlen(dtext->text)*sizeof(*dtext->positions))))
- return AVERROR(ENOMEM);
- }
-
- x = dtext->x;
- y = dtext->y;
-
- /* load and cache glyphs */
- for (i = 0, p = dtext->text; *p; i++) {
- GET_UTF8(code, *p++, continue;);
-
- /* get glyph */
- dummy.code = code;
- glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
- if (!glyph)
- load_glyph(ctx, &glyph, code);
-
- y_min = FFMIN(glyph->bbox.yMin, y_min);
- y_max = FFMAX(glyph->bbox.yMax, y_max);
- }
- text_height = y_max - y_min;
- baseline = y_max;
-
- /* compute and save position for each glyph */
- glyph = NULL;
- for (i = 0, p = dtext->text; *p; i++) {
- GET_UTF8(code, *p++, continue;);
-
- /* skip the \n in the sequence \r\n */
- if (prev_code == '\r' && code == '\n')
- continue;
-
- prev_code = code;
- if (is_newline(code)) {
- str_w = FFMAX(str_w, x - dtext->x);
- y += text_height;
- x = dtext->x;
- continue;
- }
-
- /* get glyph */
- prev_glyph = glyph;
- dummy.code = code;
- glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
-
- /* kerning */
- if (dtext->use_kerning && prev_glyph && glyph->code) {
- FT_Get_Kerning(dtext->face, prev_glyph->code, glyph->code,
- ft_kerning_default, &delta);
- x += delta.x >> 6;
- }
-
- if (x + glyph->bbox.xMax >= width) {
- str_w = FFMAX(str_w, x - dtext->x);
- y += text_height;
- x = dtext->x;
- }
-
- /* save position */
- dtext->positions[i].x = x + glyph->bitmap_left;
- dtext->positions[i].y = y - glyph->bitmap_top + baseline;
- if (code == '\t') x = (x / dtext->tabsize + 1)*dtext->tabsize;
- else x += glyph->advance;
- }
+ Glyph *glyph = NULL;
- str_w = FFMIN(width - dtext->x - 1, FFMAX(str_w, x - dtext->x));
- y = FFMIN(y + text_height, height - 1);
-
- /* draw box */
- if (dtext->draw_box)
- drawbox(picref, dtext->x, dtext->y, str_w, y-dtext->y,
- dtext->box_line, dtext->pixel_step, dtext->boxcolor,
- dtext->hsub, dtext->vsub, dtext->is_packed_rgb, dtext->rgba_map);
-
- /* draw glyphs */
- for (i = 0, p = dtext->text; *p; i++) {
+ for (i = 0, p = text; *p; i++) {
Glyph dummy = { 0 };
GET_UTF8(code, *p++, continue;);
/* skip new line chars, just go to new line */
- if (is_newline(code) || code == ' ' || code == '\t')
+ if (code == '\n' || code == '\r' || code == '\t')
continue;
dummy.code = code;
- glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
+ glyph = av_tree_find(dtext->glyphs, &dummy, (void *)glyph_cmp, NULL);
if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO &&
glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY)
if (dtext->is_packed_rgb) {
draw_glyph_rgb(picref, &glyph->bitmap,
- dtext->positions[i].x, dtext->positions[i].y, width, height,
- dtext->pixel_step[0], dtext->fontcolor_rgba, dtext->rgba_map);
+ dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
+ dtext->pixel_step[0], rgbcolor, dtext->rgba_map);
} else {
draw_glyph_yuv(picref, &glyph->bitmap,
- dtext->positions[i].x, dtext->positions[i].y, width, height,
- dtext->fontcolor, dtext->hsub, dtext->vsub);
+ dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
+ yuvcolor, dtext->hsub, dtext->vsub);
}
}
return 0;
}
-static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
+static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,
+ int width, int height)
+{
+ DrawTextContext *dtext = ctx->priv;
+ int ret;
+
+ /* draw box */
+ if (dtext->draw_box)
+ drawbox(picref, dtext->x, dtext->y, dtext->w, dtext->h,
+ dtext->box_line, dtext->pixel_step, dtext->boxcolor,
+ dtext->hsub, dtext->vsub, dtext->is_packed_rgb,
+ dtext->rgba_map);
+
+ if (dtext->shadowx || dtext->shadowy) {
+ if ((ret = draw_glyphs(dtext, picref, width, height,
+ dtext->shadowcolor_rgba,
+ dtext->shadowcolor,
+ dtext->x + dtext->shadowx,
+ dtext->y + dtext->shadowy)) < 0)
+ return ret;
+ }
+
+ if ((ret = draw_glyphs(dtext, picref, width, height,
+ dtext->fontcolor_rgba,
+ dtext->fontcolor,
+ dtext->x,
+ dtext->y)) < 0)
+ return ret;
+
+ return 0;
+}
+
+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)
+{
+ int ret = 0;
+
+ if (isnan(d)) {
+ ret = AVERROR(EINVAL);
+ } else if (d > INT_MAX || d < INT_MIN) {
+ *n = d > INT_MAX ? INT_MAX : INT_MIN;
+ ret = AVERROR(EINVAL);
+ } else
+ *n = round(d);
+
+ return ret;
+}
+
+static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
+{
+ AVFilterContext *ctx = inlink->dst;
+ DrawTextContext *dtext = ctx->priv;
+ AVFilterBufferRef *buf_out;
+ int ret = 0;
+
+ if ((ret = dtext_prepare_text(ctx)) < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Can't draw text\n");
+ 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, &dtext->prng);
+ dtext->var_values[VAR_Y] =
+ 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, &dtext->prng);
+
+ 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->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);
+
+ av_dlog(ctx, "n:%d t:%f x:%d y:%d x+w:%d y+h:%d\n",
+ (int)dtext->var_values[VAR_N], dtext->var_values[VAR_T],
+ dtext->x, dtext->y, dtext->x+dtext->w, dtext->y+dtext->h);
+
+ buf_out = avfilter_ref_buffer(inpicref, ~0);
+ if (!buf_out)
+ return AVERROR(ENOMEM);
-static void end_frame(AVFilterLink *inlink)
+ return ff_start_frame(inlink->dst->outputs[0], buf_out);
+}
+
+static int end_frame(AVFilterLink *inlink)
{
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFilterBufferRef *picref = inlink->cur_buf;
+ DrawTextContext *dtext = inlink->dst->priv;
+ int ret;
- draw_text(inlink->dst, picref, picref->video->w, picref->video->h);
+ if (dtext->draw)
+ draw_text(inlink->dst, picref, picref->video->w, picref->video->h);
- avfilter_draw_slice(outlink, 0, picref->video->h, 1);
- avfilter_end_frame(outlink);
+ dtext->var_values[VAR_N] += 1.0;
+
+ 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 = avfilter_null_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