* Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
* Copyright (c) 2003 Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
*
- * 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
*/
#include <sys/time.h>
#include <time.h>
+#include "libavcodec/timecode.h"
+#include "libavutil/avstring.h"
#include "libavutil/colorspace.h"
#include "libavutil/file.h"
+#include "libavutil/eval.h"
#include "libavutil/opt.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 FT_FREETYPE_H
#include FT_GLYPH_H
+static const char * const var_names[] = {
+ "main_w", "w", "W", ///< width of the input video
+ "main_h", "h", "H", ///< height of the input video
+ "tw", "text_w", ///< width of the rendered text
+ "th", "text_h", ///< height of the rendered text
+ "max_glyph_w", ///< max glyph width
+ "max_glyph_h", ///< max glyph height
+ "max_glyph_a", "ascent", ///< max glyph ascent
+ "max_glyph_d", "descent", ///< min glyph descent
+ "line_h", "lh", ///< line height, same as max_glyph_h
+ "sar",
+ "dar",
+ "hsub",
+ "vsub",
+ "x",
+ "y",
+ "n", ///< number of frame
+ "t", ///< timestamp expressed in seconds
+ NULL
+};
+
+static const char *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_MAIN_W, VAR_w, VAR_W,
+ VAR_MAIN_H, VAR_h, VAR_H,
+ VAR_TW, VAR_TEXT_W,
+ VAR_TH, VAR_TEXT_H,
+ VAR_MAX_GLYPH_W,
+ VAR_MAX_GLYPH_H,
+ VAR_MAX_GLYPH_A, VAR_ASCENT,
+ VAR_MAX_GLYPH_D, VAR_DESCENT,
+ VAR_LINE_H, VAR_LH,
+ VAR_SAR,
+ VAR_DAR,
+ VAR_HSUB,
+ VAR_VSUB,
+ VAR_X,
+ VAR_Y,
+ VAR_N,
+ VAR_T,
+ VAR_VARS_NB
+};
+
typedef struct {
const AVClass *class;
+ int reinit; ///< tells if the filter is being reinited
uint8_t *fontfile; ///< font to be used
uint8_t *text; ///< text to be drawn
uint8_t *expanded_text; ///< used to contain the strftime()-expanded text
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
- int x, y; ///< position to start drawing text
- int w, h; ///< dimension of the text block
+ int x; ///< x position to start drawing text
+ int y; ///< y position to start drawing text
+ int max_glyph_w; ///< max glyph width
+ int max_glyph_h; ///< max glyph heigth
int shadowx, shadowy;
unsigned int fontsize; ///< font size to use
char *fontcolor_string; ///< font color as string
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; ///< expression for x position
+ char *y_expr; ///< expression for y position
+ AVExpr *x_pexpr, *y_pexpr; ///< parsed expressions for x and y
+ int64_t basetime; ///< base pts time in the real world for display
+ double var_values[VAR_VARS_NB];
+ char *d_expr;
+ AVExpr *d_pexpr;
+ int draw; ///< set to zero to prevent drawing
+ AVLFG prng; ///< random
+ struct ff_timecode tc;
+ int frame_id;
} DrawTextContext;
#define OFFSET(x) offsetof(DrawTextContext, x)
{"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 },
+{"fontcolor", "set foreground color", OFFSET(fontcolor_string), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX },
+{"boxcolor", "set box color", OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, {.str="white"}, CHAR_MIN, CHAR_MAX },
+{"shadowcolor", "set shadow color", OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, {.str="black"}, 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 },
-{"x", "set x", OFFSET(x), AV_OPT_TYPE_INT, {.dbl=0}, 0, INT_MAX },
-{"y", "set y", OFFSET(y), AV_OPT_TYPE_INT, {.dbl=0}, 0, INT_MAX },
+{"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.dbl=16}, 1, INT_MAX },
+{"x", "set x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX },
+{"y", "set y expression", 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 },
+{"basetime", "set base time", OFFSET(basetime), AV_OPT_TYPE_INT64, {.dbl=AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX },
+{"draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX },
+{"timecode", "set initial timecode", OFFSET(tc.str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+{"r", "set rate (timecode only)", OFFSET(tc.rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX },
+{"rate", "set rate (timecode only)", OFFSET(tc.rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX },
/* 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" },
+{"default", "set default", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_DEFAULT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_scale", "set no_scale", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_SCALE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_hinting", "set no_hinting", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_HINTING}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"render", "set render", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_RENDER}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_bitmap", "set no_bitmap", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"vertical_layout", "set vertical_layout", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_VERTICAL_LAYOUT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"force_autohint", "set force_autohint", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_FORCE_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"crop_bitmap", "set crop_bitmap", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_CROP_BITMAP}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"pedantic", "set pedantic", 0, AV_OPT_TYPE_CONST, {.dbl=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, {.dbl=FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_recurse", "set no_recurse", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_RECURSE}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ignore_transform", "set ignore_transform", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_IGNORE_TRANSFORM}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"monochrome", "set monochrome", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_MONOCHROME}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"linear_design", "set linear_design", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_LINEAR_DESIGN}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_autohint", "set no_autohint", 0, AV_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_AUTOHINT}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
{NULL},
};
dtext->class = &drawtext_class;
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);
av_file_unmap(textbuf, textbuf_size);
}
+ if (dtext->tc.str) {
+ if (avpriv_init_smpte_timecode(ctx, &dtext->tc) < 0)
+ return AVERROR(EINVAL);
+ if (!dtext->text)
+ dtext->text = av_strdup("");
+ }
+
if (!dtext->text) {
av_log(ctx, AV_LOG_ERROR,
- "Either text or a valid file must be provided\n");
+ "Either text, a valid file or a timecode must be provided\n");
return AVERROR(EINVAL);
}
load_glyph(ctx, NULL, 0);
/* set the tabsize in pixels */
- if ((err = load_glyph(ctx, &glyph, ' ') < 0)) {
+ if ((err = load_glyph(ctx, &glyph, ' ')) < 0) {
av_log(ctx, AV_LOG_ERROR, "Could not set tabsize.\n");
return err;
}
dtext->tabsize *= glyph->advance;
-#if !HAVE_LOCALTIME_R
- av_log(ctx, AV_LOG_WARNING, "strftime() expansion unavailable!\n");
-#endif
-
return 0;
}
PIX_FMT_NONE
};
- avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
+ avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
DrawTextContext *dtext = ctx->priv;
int i;
- av_freep(&dtext->fontfile);
- av_freep(&dtext->text);
+ av_expr_free(dtext->x_pexpr); dtext->x_pexpr = NULL;
+ av_expr_free(dtext->y_pexpr); dtext->y_pexpr = NULL;
+
+ av_freep(&dtext->boxcolor_string);
av_freep(&dtext->expanded_text);
av_freep(&dtext->fontcolor_string);
- av_freep(&dtext->boxcolor_string);
- av_freep(&dtext->positions);
+ av_freep(&dtext->fontfile);
av_freep(&dtext->shadowcolor_string);
+ av_freep(&dtext->text);
+ av_freep(&dtext->x_expr);
+ av_freep(&dtext->y_expr);
+
+ av_freep(&dtext->positions);
+ dtext->nb_positions = 0;
+
av_tree_enumerate(dtext->glyphs, NULL, NULL, glyph_enu_free);
av_tree_destroy(dtext->glyphs);
- dtext->glyphs = 0;
+ dtext->glyphs = NULL;
+
FT_Done_Face(dtext->face);
FT_Done_FreeType(dtext->library);
av_freep(&dtext->box_line[i]);
dtext->pixel_step[i] = 0;
}
+}
+static inline int is_newline(uint32_t c)
+{
+ return (c == '\n' || c == '\r' || c == '\f' || c == '\v');
}
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->shadowcolor[3] = rgba[3];
}
+ dtext->var_values[VAR_w] = dtext->var_values[VAR_W] = dtext->var_values[VAR_MAIN_W] = inlink->w;
+ dtext->var_values[VAR_h] = dtext->var_values[VAR_H] = dtext->var_values[VAR_MAIN_H] = inlink->h;
+ dtext->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
+ dtext->var_values[VAR_DAR] = (double)inlink->w / inlink->h * dtext->var_values[VAR_SAR];
+ dtext->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
+ dtext->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
+ dtext->var_values[VAR_X] = NAN;
+ dtext->var_values[VAR_Y] = NAN;
+ if (!dtext->reinit)
+ 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);
+
return 0;
}
+static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
+{
+ DrawTextContext *dtext = ctx->priv;
+
+ if (!strcmp(cmd, "reinit")) {
+ int ret;
+ uninit(ctx);
+ dtext->reinit = 1;
+ if ((ret = init(ctx, arg, NULL)) < 0)
+ return ret;
+ return config_input(ctx->inputs[0]);
+ }
+
+ return AVERROR(ENOSYS);
+}
+
#define GET_BITMAP_VAL(r, c) \
bitmap->pixel_mode == FT_PIXEL_MODE_MONO ? \
(bitmap->buffer[(r) * bitmap->pitch + ((c)>>3)] & (0x80 >> ((c)&7))) * 255 : \
}\
}
-static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x,
- unsigned int y, unsigned int width, unsigned int height,
+static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap,
+ int x, int y, int width, int height,
const uint8_t yuva_color[4], int hsub, int vsub)
{
int r, c, alpha;
for (r = 0; r < bitmap->rows && r+y < height; r++) {
for (c = 0; c < bitmap->width && c+x < width; c++) {
+ if (c+x < 0 || r+y < 0)
+ continue;
+
/* get intensity value in the glyph bitmap (source) */
src_val = GET_BITMAP_VAL(r, c);
if (!src_val)
}
static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap,
- unsigned int x, unsigned int y,
- unsigned int width, unsigned int height, int pixel_step,
+ int x, int y, int width, int height, int pixel_step,
const uint8_t rgba_color[4], const uint8_t rgba_map[4])
{
int r, c, alpha;
for (r = 0; r < bitmap->rows && r+y < height; r++) {
for (c = 0; c < bitmap->width && c+x < width; c++) {
+ if (c+x < 0 || r+y < 0)
+ continue;
/* get intensity value in the glyph bitmap (source) */
src_val = GET_BITMAP_VAL(r, c);
if (!src_val)
return 0;
}
-static inline void drawbox(AVFilterBufferRef *picref, unsigned int x, unsigned int y,
- unsigned int width, unsigned int height,
+static inline void drawbox(AVFilterBufferRef *picref, int x, int y,
+ int width, int height,
uint8_t *line[4], int pixel_step[4], uint8_t color[4],
int hsub, int vsub, int is_rgba_packed, uint8_t rgba_map[4])
{
}
}
-static inline int is_newline(uint32_t c)
-{
- return (c == '\n' || c == '\r' || c == '\f' || c == '\v');
-}
-
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)
{
- char *text = HAVE_LOCALTIME_R ? dtext->expanded_text : dtext->text;
+ char *text = dtext->expanded_text;
uint32_t code = 0;
- int i;
+ int i, x1, y1;
uint8_t *p;
Glyph *glyph = NULL;
glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY)
return AVERROR(EINVAL);
+ x1 = dtext->positions[i].x+dtext->x+x;
+ y1 = dtext->positions[i].y+dtext->y+y;
+
if (dtext->is_packed_rgb) {
draw_glyph_rgb(picref, &glyph->bitmap,
- dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
+ x1, y1, width, height,
dtext->pixel_step[0], rgbcolor, dtext->rgba_map);
} else {
draw_glyph_yuv(picref, &glyph->bitmap,
- dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
+ x1, y1, width, height,
yuvcolor, dtext->hsub, dtext->vsub);
}
}
return 0;
}
-static int dtext_prepare_text(AVFilterContext *ctx, int width, int height)
+static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,
+ int width, int height)
{
DrawTextContext *dtext = ctx->priv;
uint32_t code = 0, prev_code = 0;
int x = 0, y = 0, i = 0, ret;
- int text_height, baseline;
+ int max_text_line_w = 0, len;
+ int box_w, box_h;
char *text = dtext->text;
uint8_t *p;
- int str_w = 0, len;
int y_min = 32000, y_max = -32000;
+ int x_min = 32000, x_max = -32000;
FT_Vector delta;
Glyph *glyph = NULL, *prev_glyph = NULL;
Glyph dummy = { 0 };
-#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(dtext->basetime != AV_NOPTS_VALUE)
+ now= picref->pts*av_q2d(ctx->inputs[0]->time_base) + dtext->basetime/1000000;
+
if (!buf) {
buf_size = 2*strlen(dtext->text)+1;
buf = av_malloc(buf_size);
}
+#if HAVE_LOCALTIME_R
localtime_r(&now, <ime);
+#else
+ if(strchr(dtext->text, '%'))
+ ltime= *localtime(&now);
+#endif
do {
*buf = 1;
buf_size *= 2;
} while ((buf = av_realloc(buf, buf_size)));
+ if (dtext->tc.str) {
+ char tcbuf[sizeof("hh:mm:ss.ff")];
+ avpriv_timecode_to_string(tcbuf, &dtext->tc, dtext->frame_id++);
+ buf = av_asprintf("%s%s", dtext->text, tcbuf);
+ }
+
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;
+ if (!(dtext->positions =
+ av_realloc(dtext->positions, len*sizeof(*dtext->positions))))
return AVERROR(ENOMEM);
- } else {
- dtext->positions = p;
- dtext->nb_positions = len;
- }
+ dtext->nb_positions = len;
}
+ x = 0;
+ y = 0;
+
/* load and cache glyphs */
for (i = 0, p = text; *p; i++) {
GET_UTF8(code, *p++, continue;);
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;
+ load_glyph(ctx, &glyph, code);
y_min = FFMIN(glyph->bbox.yMin, y_min);
y_max = FFMAX(glyph->bbox.yMax, y_max);
+ x_min = FFMIN(glyph->bbox.xMin, x_min);
+ x_max = FFMAX(glyph->bbox.xMax, x_max);
}
- text_height = y_max - y_min;
- baseline = y_max;
+ dtext->max_glyph_h = y_max - y_min;
+ dtext->max_glyph_w = x_max - x_min;
/* compute and save position for each glyph */
glyph = NULL;
prev_code = code;
if (is_newline(code)) {
- str_w = FFMAX(str_w, x - dtext->x);
- y += text_height;
+ max_text_line_w = FFMAX(max_text_line_w, x);
+ y += dtext->max_glyph_h;
x = 0;
continue;
}
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;
+ dtext->positions[i].y = y - glyph->bitmap_top + y_max;
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);
+ max_text_line_w = FFMAX(x, max_text_line_w);
- dtext->w = str_w;
- dtext->h = y;
+ dtext->var_values[VAR_TW] = dtext->var_values[VAR_TEXT_W] = max_text_line_w;
+ dtext->var_values[VAR_TH] = dtext->var_values[VAR_TEXT_H] = y + dtext->max_glyph_h;
- return 0;
-}
+ dtext->var_values[VAR_MAX_GLYPH_W] = dtext->max_glyph_w;
+ dtext->var_values[VAR_MAX_GLYPH_H] = dtext->max_glyph_h;
+ dtext->var_values[VAR_MAX_GLYPH_A] = dtext->var_values[VAR_ASCENT ] = y_max;
+ dtext->var_values[VAR_MAX_GLYPH_D] = dtext->var_values[VAR_DESCENT] = y_min;
+ dtext->var_values[VAR_LINE_H] = dtext->var_values[VAR_LH] = dtext->max_glyph_h;
-static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,
- int width, int height)
-{
- DrawTextContext *dtext = ctx->priv;
- int ret;
+ dtext->x = dtext->var_values[VAR_X] = av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng);
+ dtext->y = dtext->var_values[VAR_Y] = av_expr_eval(dtext->y_pexpr, dtext->var_values, &dtext->prng);
+ dtext->x = 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);
+
+ if(!dtext->draw)
+ return 0;
+
+ dtext->x &= ~((1 << dtext->hsub) - 1);
+ dtext->y &= ~((1 << dtext->vsub) - 1);
+
+ box_w = FFMIN(width - 1 , max_text_line_w);
+ box_h = FFMIN(height - 1, y + dtext->max_glyph_h);
/* 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);
+ drawbox(picref, dtext->x, dtext->y, box_w, box_h,
+ dtext->box_line, dtext->pixel_step, dtext->boxcolor_rgba,
+ 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)
+ if ((ret = draw_glyphs(dtext, picref, width, height, dtext->shadowcolor_rgba,
+ dtext->shadowcolor, dtext->shadowx, dtext->shadowy)) < 0)
return ret;
}
- if ((ret = draw_glyphs(dtext, picref, width, height,
- dtext->fontcolor_rgba,
- dtext->fontcolor,
- dtext->x,
- dtext->y)) < 0)
+ if ((ret = draw_glyphs(dtext, picref, width, height, dtext->fontcolor_rgba,
+ dtext->fontcolor, 0, 0)) < 0)
return ret;
return 0;
static void end_frame(AVFilterLink *inlink)
{
- AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ DrawTextContext *dtext = ctx->priv;
AVFilterBufferRef *picref = inlink->cur_buf;
- dtext_prepare_text(inlink->dst, picref->video->w, picref->video->h);
- draw_text(inlink->dst, picref, picref->video->w, picref->video->h);
+ dtext->var_values[VAR_T] = picref->pts == AV_NOPTS_VALUE ?
+ NAN : picref->pts * av_q2d(inlink->time_base);
+
+ draw_text(ctx, picref, picref->video->w, picref->video->h);
+
+ av_log(ctx, AV_LOG_DEBUG, "n:%d t:%f text_w:%d text_h:%d x:%d y:%d\n",
+ (int)dtext->var_values[VAR_N], dtext->var_values[VAR_T],
+ (int)dtext->var_values[VAR_TEXT_W], (int)dtext->var_values[VAR_TEXT_H],
+ dtext->x, dtext->y);
+
+ dtext->var_values[VAR_N] += 1.0;
avfilter_draw_slice(outlink, 0, picref->video->h, 1);
avfilter_end_frame(outlink);
.uninit = uninit,
.query_formats = query_formats,
- .inputs = (AVFilterPad[]) {{ .name = "default",
+ .inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = avfilter_null_get_video_buffer,
.start_frame = avfilter_null_start_frame,
AV_PERM_READ,
.rej_perms = AV_PERM_PRESERVE },
{ .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
+ .outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
+ .process_command = command,
};
projects / ffmpeg / blobdiff