diff options
Diffstat (limited to 'libavfilter/vf_drawtext.c')
| -rw-r--r-- | libavfilter/vf_drawtext.c | 597 |
1 files changed, 304 insertions, 293 deletions
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c index 060c3a4a0e..0c545c8140 100644 --- a/libavfilter/vf_drawtext.c +++ b/libavfilter/vf_drawtext.c @@ -3,20 +3,20 @@ * 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 */ @@ -29,11 +29,12 @@ #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/mathematics.h" #include "libavutil/random_seed.h" #include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" @@ -49,18 +50,24 @@ #include FT_FREETYPE_H #include FT_GLYPH_H -static const char *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 +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 processed frames - "t", ///< timestamp expressed in seconds + "n", ///< number of frame + "t", ///< timestamp expressed in seconds NULL }; @@ -81,13 +88,19 @@ static const eval_func2 fun2[] = { }; 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_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, @@ -97,6 +110,7 @@ enum var_name { 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 @@ -105,8 +119,10 @@ typedef struct { 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 @@ -131,13 +147,17 @@ typedef struct { 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; + 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) @@ -146,35 +166,39 @@ static const AVOption drawtext_options[]= { {"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_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 }, +{"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}, }; @@ -282,9 +306,6 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) 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); @@ -319,9 +340,16 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) 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); } @@ -367,16 +395,12 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) 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; } @@ -392,7 +416,7 @@ static int query_formats(AVFilterContext *ctx) 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; } @@ -407,16 +431,25 @@ static av_cold void uninit(AVFilterContext *ctx) 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); @@ -424,7 +457,6 @@ static av_cold void uninit(AVFilterContext *ctx) av_freep(&dtext->box_line[i]); dtext->pixel_step[i] = 0; } - } static inline int is_newline(uint32_t c) @@ -432,131 +464,9 @@ 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->h = y; - - return 0; -} - - static int config_input(AVFilterLink *inlink) { - AVFilterContext *ctx = inlink->dst; + AVFilterContext *ctx = inlink->dst; DrawTextContext *dtext = ctx->priv; const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format]; int ret; @@ -564,30 +474,6 @@ static int config_input(AVFilterLink *inlink) 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, @@ -608,9 +494,46 @@ static int config_input(AVFilterLink *inlink) dtext->shadowcolor[3] = rgba[3]; } - dtext->draw = 1; + 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 dtext_prepare_text(ctx); + 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) \ @@ -630,8 +553,8 @@ static int config_input(AVFilterLink *inlink) }\ } -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; @@ -640,6 +563,9 @@ static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, u 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) @@ -661,8 +587,7 @@ static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, u } 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; @@ -671,6 +596,8 @@ static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap, 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) @@ -684,8 +611,8 @@ static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap, 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]) { @@ -714,9 +641,9 @@ static inline void drawbox(AVFilterBufferRef *picref, unsigned int x, unsigned i 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; @@ -735,13 +662,16 @@ static int draw_glyphs(DrawTextContext *dtext, AVFilterBufferRef *picref, 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); } } @@ -753,102 +683,182 @@ static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref, int width, int height) { DrawTextContext *dtext = ctx->priv; - int ret; + uint32_t code = 0, prev_code = 0; + int x = 0, y = 0, i = 0, ret; + int max_text_line_w = 0, len; + int box_w, box_h; + char *text = dtext->text; + uint8_t *p; + 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 }; - /* 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); + time_t now = time(0); + struct tm ltime; + uint8_t *buf = dtext->expanded_text; + int buf_size = dtext->expanded_text_size; - 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(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 ((ret = draw_glyphs(dtext, picref, width, height, - dtext->fontcolor_rgba, - dtext->fontcolor, - dtext->x, - dtext->y)) < 0) - return ret; +#if HAVE_LOCALTIME_R + localtime_r(&now, <ime); +#else + if(strchr(dtext->text, '%')) + ltime= *localtime(&now); +#endif - return 0; -} + do { + *buf = 1; + if (strftime(buf, buf_size, dtext->text, <ime) != 0 || *buf == 0) + break; + buf_size *= 2; + } while ((buf = av_realloc(buf, buf_size))); -static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } + 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); + } -static inline int normalize_double(int *n, double d) -{ - int ret = 0; + if (!buf) + return AVERROR(ENOMEM); + text = dtext->expanded_text = buf; + dtext->expanded_text_size = buf_size; + if ((len = strlen(text)) > dtext->nb_positions) { + if (!(dtext->positions = + av_realloc(dtext->positions, len*sizeof(*dtext->positions)))) + return AVERROR(ENOMEM); + dtext->nb_positions = len; + } - 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); + x = 0; + y = 0; - return ret; -} + /* load and cache glyphs */ + for (i = 0, p = text; *p; i++) { + GET_UTF8(code, *p++, continue;); -static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) -{ - AVFilterContext *ctx = inlink->dst; - DrawTextContext *dtext = ctx->priv; - int fail = 0; + /* 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); + x_min = FFMIN(glyph->bbox.xMin, x_min); + x_max = FFMAX(glyph->bbox.xMax, x_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; + 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)) { + max_text_line_w = FFMAX(max_text_line_w, x); + y += dtext->max_glyph_h; + 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 (dtext_prepare_text(ctx) < 0) { - av_log(ctx, AV_LOG_ERROR, "Can't draw text\n"); - fail = 1; + /* save position */ + dtext->positions[i].x = x + glyph->bitmap_left; + dtext->positions[i].y = y - glyph->bitmap_top + y_max; + if (code == '\t') x = (x / dtext->tabsize + 1)*dtext->tabsize; + else x += glyph->advance; } - 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); + max_text_line_w = FFMAX(x, max_text_line_w); + + 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; + + 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->draw = fail ? 0 : - av_expr_eval(dtext->d_pexpr, dtext->var_values, &dtext->prng); + dtext->var_values[VAR_LINE_H] = dtext->var_values[VAR_LH] = dtext->max_glyph_h; - normalize_double(&dtext->x, dtext->var_values[VAR_X]); - normalize_double(&dtext->y, dtext->var_values[VAR_Y]); + 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->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->draw) + return 0; 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); + box_w = FFMIN(width - 1 , max_text_line_w); + box_h = FFMIN(height - 1, y + dtext->max_glyph_h); - avfilter_start_frame(inlink->dst->outputs[0], inpicref); + /* draw box */ + if (dtext->draw_box) + 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->shadowx, dtext->shadowy)) < 0) + return ret; + } + + if ((ret = draw_glyphs(dtext, picref, width, height, dtext->fontcolor_rgba, + dtext->fontcolor, 0, 0)) < 0) + return ret; + + return 0; } +static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } + 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; - DrawTextContext *dtext = inlink->dst->priv; - if (dtext->draw) - 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; @@ -864,10 +874,10 @@ AVFilter avfilter_vf_drawtext = { .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 = start_frame, + .start_frame = avfilter_null_start_frame, .draw_slice = null_draw_slice, .end_frame = end_frame, .config_props = config_input, @@ -875,7 +885,8 @@ AVFilter avfilter_vf_drawtext = { 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, }; |