diff options
Diffstat (limited to 'libavfilter/vf_drawtext.c')
-rw-r--r-- | libavfilter/vf_drawtext.c | 1372 |
1 files changed, 866 insertions, 506 deletions
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c index 54a8847..d20f805 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 */ @@ -28,25 +28,30 @@ #include "config.h" -#include <sys/types.h> +#if HAVE_SYS_TIME_H #include <sys/time.h> +#endif +#include <sys/types.h> #include <sys/stat.h> #include <time.h> +#if HAVE_UNISTD_H #include <unistd.h> +#endif +#include <fenv.h> #if CONFIG_LIBFONTCONFIG #include <fontconfig/fontconfig.h> #endif -#include "libavutil/colorspace.h" +#include "libavutil/avstring.h" +#include "libavutil/bprint.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/timecode.h" #include "libavutil/time_internal.h" #include "libavutil/tree.h" #include "libavutil/lfg.h" @@ -56,22 +61,33 @@ #include "internal.h" #include "video.h" +#if CONFIG_LIBFRIBIDI +#include <fribidi.h> +#endif + #include <ft2build.h> #include FT_FREETYPE_H #include FT_GLYPH_H +#include FT_STROKER_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 + "dar", + "hsub", "vsub", + "line_h", "lh", ///< line height, same as max_glyph_h + "main_h", "h", "H", ///< height of the input video + "main_w", "w", "W", ///< width of the input video + "max_glyph_a", "ascent", ///< max glyph ascent + "max_glyph_d", "descent", ///< min glyph descent + "max_glyph_h", ///< max glyph height + "max_glyph_w", ///< max glyph width + "n", ///< number of frame + "sar", + "t", ///< timestamp expressed in seconds + "text_h", "th", ///< height of the rendered text + "text_w", "tw", ///< width of the rendered text "x", "y", - "n", ///< number of processed frames - "t", ///< timestamp expressed in seconds + "pict_type", NULL }; @@ -92,95 +108,134 @@ 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_DAR, + VAR_HSUB, VAR_VSUB, + VAR_LINE_H, VAR_LH, + VAR_MAIN_H, VAR_h, VAR_H, + VAR_MAIN_W, VAR_w, VAR_W, + VAR_MAX_GLYPH_A, VAR_ASCENT, + VAR_MAX_GLYPH_D, VAR_DESCENT, + VAR_MAX_GLYPH_H, + VAR_MAX_GLYPH_W, + VAR_N, + VAR_SAR, + VAR_T, VAR_TEXT_H, VAR_TH, + VAR_TEXT_W, VAR_TW, VAR_X, VAR_Y, - VAR_N, - VAR_T, + VAR_PICT_TYPE, VAR_VARS_NB }; +enum expansion_mode { + EXP_NONE, + EXP_NORMAL, + EXP_STRFTIME, +}; + typedef struct DrawTextContext { const AVClass *class; + enum expansion_mode exp_mode; ///< expansion mode to use for the text + int reinit; ///< tells if the filter is being reinited #if CONFIG_LIBFONTCONFIG uint8_t *font; ///< font to be used #endif 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 - size_t expanded_text_size; ///< size in bytes of the expanded_text buffer + AVBPrint expanded_text; ///< used to contain the expanded text + uint8_t *fontcolor_expr; ///< fontcolor expression to evaluate + AVBPrint expanded_fontcolor; ///< used to contain the expanded fontcolor spec 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 - 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 height int shadowx, shadowy; + int borderw; ///< border width 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 + FFDrawContext dc; + FFDrawColor fontcolor; ///< foreground color + FFDrawColor shadowcolor; ///< shadow color + FFDrawColor bordercolor; ///< border color + FFDrawColor boxcolor; ///< background color + FT_Library library; ///< freetype font library handle FT_Face face; ///< freetype font face handle + FT_Stroker stroker; ///< freetype stroker handle struct AVTreeNode *glyphs; ///< rendered glyphs, stored using the UTF-32 char code - int hsub, vsub; ///< chroma subsampling values - int is_packed_rgb; - 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 + char *tc_opt_string; ///< specified timecode option string + AVRational tc_rate; ///< frame rate for timecode + AVTimecode tc; ///< timecode context + int tc24hmax; ///< 1 if timecode is wrapped to 24 hours, 0 otherwise + int reload; ///< reload text file for each frame + int start_number; ///< starting frame number for n/frame_num var +#if CONFIG_LIBFRIBIDI + int text_shaping; ///< 1 to shape the text before drawing it +#endif + AVDictionary *metadata; } DrawTextContext; #define OFFSET(x) offsetof(DrawTextContext, x) -#define FLAGS AV_OPT_FLAG_VIDEO_PARAM +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM static const AVOption drawtext_options[]= { + {"fontfile", "set font file", OFFSET(fontfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"text", "set text", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"textfile", "set text file", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"fontcolor", "set foreground color", OFFSET(fontcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"fontcolor_expr", "set foreground color expression", OFFSET(fontcolor_expr), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"boxcolor", "set box color", OFFSET(boxcolor.rgba), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"bordercolor", "set border color", OFFSET(bordercolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"shadowcolor", "set shadow color", OFFSET(shadowcolor.rgba), AV_OPT_TYPE_COLOR, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"box", "set box", OFFSET(draw_box), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 , FLAGS}, + {"fontsize", "set font size", OFFSET(fontsize), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX , FLAGS}, + {"x", "set x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"y", "set y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"shadowx", "set x", OFFSET(shadowx), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, + {"shadowy", "set y", OFFSET(shadowy), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, + {"borderw", "set border width", OFFSET(borderw), AV_OPT_TYPE_INT, {.i64=0}, INT_MIN, INT_MAX , FLAGS}, + {"tabsize", "set tab size", OFFSET(tabsize), AV_OPT_TYPE_INT, {.i64=4}, 0, INT_MAX , FLAGS}, + {"basetime", "set base time", OFFSET(basetime), AV_OPT_TYPE_INT64, {.i64=AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX , FLAGS}, #if CONFIG_LIBFONTCONFIG { "font", "Font name", OFFSET(font), AV_OPT_TYPE_STRING, { .str = "Sans" }, .flags = FLAGS }, #endif - { "fontfile", NULL, OFFSET(fontfile), AV_OPT_TYPE_STRING, .flags = FLAGS }, - { "text", NULL, OFFSET(text), AV_OPT_TYPE_STRING, .flags = FLAGS }, - { "textfile", NULL, OFFSET(textfile), AV_OPT_TYPE_STRING, .flags = FLAGS }, - { "fontcolor", NULL, OFFSET(fontcolor_string), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS }, - { "boxcolor", NULL, OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, { .str = "white" }, .flags = FLAGS }, - { "shadowcolor", NULL, OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS }, - { "box", NULL, OFFSET(draw_box), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS }, - { "fontsize", NULL, OFFSET(fontsize), AV_OPT_TYPE_INT, { .i64 = 16 }, 1, 72, FLAGS }, - { "x", NULL, OFFSET(x_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, - { "y", NULL, OFFSET(y_expr), AV_OPT_TYPE_STRING, { .str = "0" }, .flags = FLAGS }, - { "shadowx", NULL, OFFSET(shadowx), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, - { "shadowy", NULL, OFFSET(shadowy), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FLAGS }, - { "tabsize", NULL, OFFSET(tabsize), AV_OPT_TYPE_INT, { .i64 = 4 }, 0, INT_MAX, FLAGS }, - { "draw", "if false do not draw", OFFSET(d_expr), AV_OPT_TYPE_STRING, { .str = "1" }, .flags = FLAGS }, - { "fix_bounds", "if true, check and fix text coords to avoid clipping", - OFFSET(fix_bounds), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, FLAGS }, + + {"expansion", "set the expansion mode", OFFSET(exp_mode), AV_OPT_TYPE_INT, {.i64=EXP_NORMAL}, 0, 2, FLAGS, "expansion"}, + {"none", "set no expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NONE}, 0, 0, FLAGS, "expansion"}, + {"normal", "set normal expansion", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_NORMAL}, 0, 0, FLAGS, "expansion"}, + {"strftime", "set strftime expansion (deprecated)", OFFSET(exp_mode), AV_OPT_TYPE_CONST, {.i64=EXP_STRFTIME}, 0, 0, FLAGS, "expansion"}, + + {"timecode", "set initial timecode", OFFSET(tc_opt_string), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS}, + {"tc24hmax", "set 24 hours max (timecode only)", OFFSET(tc24hmax), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, + {"timecode_rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, + {"r", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, + {"rate", "set rate (timecode only)", OFFSET(tc_rate), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, INT_MAX, FLAGS}, + {"reload", "reload text file for each frame", OFFSET(reload), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, + {"fix_bounds", "if true, check and fix text coords to avoid clipping", OFFSET(fix_bounds), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, + {"start_number", "start frame number for n/frame_num variable", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS}, + +#if CONFIG_LIBFRIBIDI + {"text_shaping", "attempt to shape text before drawing", OFFSET(text_shaping), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS}, +#endif /* 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, FLAGS, "ft_load_flags" }, + { "ft_load_flags", "set font loading flags for libfreetype", OFFSET(ft_load_flags), AV_OPT_TYPE_FLAGS, { .i64 = FT_LOAD_DEFAULT }, 0, INT_MAX, FLAGS, "ft_load_flags" }, { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_DEFAULT }, .flags = FLAGS, .unit = "ft_load_flags" }, { "no_scale", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_SCALE }, .flags = FLAGS, .unit = "ft_load_flags" }, { "no_hinting", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_HINTING }, .flags = FLAGS, .unit = "ft_load_flags" }, @@ -196,38 +251,31 @@ static const AVOption drawtext_options[]= { { "monochrome", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_MONOCHROME }, .flags = FLAGS, .unit = "ft_load_flags" }, { "linear_design", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_LINEAR_DESIGN }, .flags = FLAGS, .unit = "ft_load_flags" }, { "no_autohint", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FT_LOAD_NO_AUTOHINT }, .flags = FLAGS, .unit = "ft_load_flags" }, - { NULL}, + { NULL } }; -static const char *drawtext_get_name(void *ctx) -{ - return "drawtext"; -} - -static const AVClass drawtext_class = { - "DrawTextContext", - drawtext_get_name, - drawtext_options -}; +AVFILTER_DEFINE_CLASS(drawtext); #undef __FTERRORS_H__ #define FT_ERROR_START_LIST { #define FT_ERRORDEF(e, v, s) { (e), (s) }, #define FT_ERROR_END_LIST { 0, NULL } }; -struct ft_error +static const struct ft_error { int err; const char *err_msg; -} static ft_errors[] = +} ft_errors[] = #include FT_ERRORS_H #define FT_ERRMSG(e) ft_errors[e].err_msg typedef struct Glyph { - FT_Glyph *glyph; + FT_Glyph glyph; + FT_Glyph border_glyph; uint32_t code; FT_Bitmap bitmap; ///< array holding bitmaps of font + FT_Bitmap border_bitmap; ///< array holding bitmaps of font border FT_BBox bbox; int advance; int bitmap_left; @@ -247,6 +295,7 @@ static int glyph_cmp(void *key, const void *b) static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) { DrawTextContext *s = ctx->priv; + FT_BitmapGlyph bitmapglyph; Glyph *glyph; struct AVTreeNode *node = NULL; int ret; @@ -255,26 +304,40 @@ static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) if (FT_Load_Char(s->face, code, s->ft_load_flags)) return AVERROR(EINVAL); - /* save glyph */ - if (!(glyph = av_mallocz(sizeof(*glyph))) || - !(glyph->glyph = av_mallocz(sizeof(*glyph->glyph)))) { + glyph = av_mallocz(sizeof(*glyph)); + if (!glyph) { ret = AVERROR(ENOMEM); goto error; } glyph->code = code; - if (FT_Get_Glyph(s->face->glyph, glyph->glyph)) { + if (FT_Get_Glyph(s->face->glyph, &glyph->glyph)) { ret = AVERROR(EINVAL); goto error; } + if (s->borderw) { + glyph->border_glyph = glyph->glyph; + if (FT_Glyph_StrokeBorder(&glyph->border_glyph, s->stroker, 0, 0) || + FT_Glyph_To_Bitmap(&glyph->border_glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { + ret = AVERROR_EXTERNAL; + goto error; + } + bitmapglyph = (FT_BitmapGlyph) glyph->border_glyph; + glyph->border_bitmap = bitmapglyph->bitmap; + } + if (FT_Glyph_To_Bitmap(&glyph->glyph, FT_RENDER_MODE_NORMAL, 0, 1)) { + ret = AVERROR_EXTERNAL; + goto error; + } + bitmapglyph = (FT_BitmapGlyph) glyph->glyph; - glyph->bitmap = s->face->glyph->bitmap; - glyph->bitmap_left = s->face->glyph->bitmap_left; - glyph->bitmap_top = s->face->glyph->bitmap_top; + glyph->bitmap = bitmapglyph->bitmap; + glyph->bitmap_left = bitmapglyph->left; + glyph->bitmap_top = bitmapglyph->top; glyph->advance = s->face->glyph->advance.x >> 6; /* measure text height to calculate text_height (or the maximum text height) */ - FT_Glyph_Get_CBox(*glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox); + FT_Glyph_Get_CBox(glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox); /* cache the newly created glyph */ if (!(node = av_tree_node_alloc())) { @@ -290,89 +353,235 @@ static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code) error: if (glyph) av_freep(&glyph->glyph); + av_freep(&glyph); av_freep(&node); return ret; } -static int parse_font(AVFilterContext *ctx) +static int load_font_file(AVFilterContext *ctx, const char *path, int index) { DrawTextContext *s = ctx->priv; -#if !CONFIG_LIBFONTCONFIG - if (!s->fontfile) { - av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); + int err; + + err = FT_New_Face(s->library, path, index, &s->face); + if (err) { + av_log(ctx, AV_LOG_ERROR, "Could not load font \"%s\": %s\n", + s->fontfile, FT_ERRMSG(err)); return AVERROR(EINVAL); } - return 0; -#else +} + +#if CONFIG_LIBFONTCONFIG +static int load_font_fontconfig(AVFilterContext *ctx) +{ + DrawTextContext *s = ctx->priv; + FcConfig *fontconfig; FcPattern *pat, *best; FcResult result = FcResultMatch; - - FcBool fc_bool; - FcChar8* fc_string; + FcChar8 *filename; + int index; + double size; int err = AVERROR(ENOENT); - if (s->fontfile) - return 0; - - if (!FcInit()) + fontconfig = FcInitLoadConfigAndFonts(); + if (!fontconfig) { + av_log(ctx, AV_LOG_ERROR, "impossible to init fontconfig\n"); return AVERROR_UNKNOWN; - - if (!(pat = FcPatternCreate())) - return AVERROR(ENOMEM); + } + pat = FcNameParse(s->fontfile ? s->fontfile : + (uint8_t *)(intptr_t)"default"); + if (!pat) { + av_log(ctx, AV_LOG_ERROR, "could not parse fontconfig pat"); + return AVERROR(EINVAL); + } FcPatternAddString(pat, FC_FAMILY, s->font); - FcPatternAddBool(pat, FC_OUTLINE, FcTrue); - FcPatternAddDouble(pat, FC_SIZE, (double)s->fontsize); + if (s->fontsize) + FcPatternAddDouble(pat, FC_SIZE, (double)s->fontsize); FcDefaultSubstitute(pat); - if (!FcConfigSubstitute(NULL, pat, FcMatchPattern)) { + if (!FcConfigSubstitute(fontconfig, pat, FcMatchPattern)) { + av_log(ctx, AV_LOG_ERROR, "could not substitue fontconfig options"); /* very unlikely */ FcPatternDestroy(pat); return AVERROR(ENOMEM); } - best = FcFontMatch(NULL, pat, &result); + best = FcFontMatch(fontconfig, pat, &result); FcPatternDestroy(pat); - if (!best || result == FcResultNoMatch) { - av_log(ctx, AV_LOG_ERROR, - "Cannot find a valid font for the family %s\n", - s->font); - goto fail; - } - - if (FcPatternGetBool(best, FC_OUTLINE, 0, &fc_bool) != FcResultMatch || - !fc_bool) { - av_log(ctx, AV_LOG_ERROR, "Outline not available for %s\n", + if (!best || result != FcResultMatch) { + av_log(ctx, AV_LOG_ERROR, + "Cannot find a valid font for the family %s\n", s->font); goto fail; } - if (FcPatternGetString(best, FC_FAMILY, 0, &fc_string) != FcResultMatch) { - av_log(ctx, AV_LOG_ERROR, "No matches for %s\n", - s->font); - goto fail; + if ( + FcPatternGetInteger(best, FC_INDEX, 0, &index ) != FcResultMatch || + FcPatternGetDouble (best, FC_SIZE, 0, &size ) != FcResultMatch) { + av_log(ctx, AV_LOG_ERROR, "impossible to find font information"); + return AVERROR(EINVAL); } - if (FcPatternGetString(best, FC_FILE, 0, &fc_string) != FcResultMatch) { + if (FcPatternGetString(best, FC_FILE, 0, &filename) != FcResultMatch) { av_log(ctx, AV_LOG_ERROR, "No file path for %s\n", s->font); goto fail; } - s->fontfile = av_strdup(fc_string); - if (!s->fontfile) - err = AVERROR(ENOMEM); - else - err = 0; + av_log(ctx, AV_LOG_INFO, "Using \"%s\"\n", filename); + if (!s->fontsize) + s->fontsize = size + 0.5; + err = load_font_file(ctx, filename, index); + if (err) + return err; + FcConfigDestroy(fontconfig); fail: FcPatternDestroy(best); return err; +} +#endif + +static int load_font(AVFilterContext *ctx) +{ + DrawTextContext *s = ctx->priv; + int err; + + /* load the face, and set up the encoding, which is by default UTF-8 */ + err = load_font_file(ctx, s->fontfile, 0); + if (!err) + return 0; +#if CONFIG_LIBFONTCONFIG + err = load_font_fontconfig(ctx); + if (!err) + return 0; #endif + return err; +} + +static int load_textfile(AVFilterContext *ctx) +{ + DrawTextContext *s = ctx->priv; + int err; + uint8_t *textbuf; + uint8_t *tmp; + size_t textbuf_size; + + if ((err = av_file_map(s->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { + av_log(ctx, AV_LOG_ERROR, + "The text file '%s' could not be read or is empty\n", + s->textfile); + return err; + } + + if (textbuf_size > SIZE_MAX - 1 || !(tmp = av_realloc(s->text, textbuf_size + 1))) { + av_file_unmap(textbuf, textbuf_size); + return AVERROR(ENOMEM); + } + s->text = tmp; + memcpy(s->text, textbuf, textbuf_size); + s->text[textbuf_size] = 0; + av_file_unmap(textbuf, textbuf_size); + + return 0; +} + +static inline int is_newline(uint32_t c) +{ + return c == '\n' || c == '\r' || c == '\f' || c == '\v'; +} + +#if CONFIG_LIBFRIBIDI +static int shape_text(AVFilterContext *ctx) +{ + DrawTextContext *s = ctx->priv; + uint8_t *tmp; + int ret = AVERROR(ENOMEM); + static const FriBidiFlags flags = FRIBIDI_FLAGS_DEFAULT | + FRIBIDI_FLAGS_ARABIC; + FriBidiChar *unicodestr = NULL; + FriBidiStrIndex len; + FriBidiParType direction = FRIBIDI_PAR_LTR; + FriBidiStrIndex line_start = 0; + FriBidiStrIndex line_end = 0; + FriBidiLevel *embedding_levels = NULL; + FriBidiArabicProp *ar_props = NULL; + FriBidiCharType *bidi_types = NULL; + FriBidiStrIndex i,j; + + len = strlen(s->text); + if (!(unicodestr = av_malloc_array(len, sizeof(*unicodestr)))) { + goto out; + } + len = fribidi_charset_to_unicode(FRIBIDI_CHAR_SET_UTF8, + s->text, len, unicodestr); + + bidi_types = av_malloc_array(len, sizeof(*bidi_types)); + if (!bidi_types) { + goto out; + } + + fribidi_get_bidi_types(unicodestr, len, bidi_types); + + embedding_levels = av_malloc_array(len, sizeof(*embedding_levels)); + if (!embedding_levels) { + goto out; + } + + if (!fribidi_get_par_embedding_levels(bidi_types, len, &direction, + embedding_levels)) { + goto out; + } + + ar_props = av_malloc_array(len, sizeof(*ar_props)); + if (!ar_props) { + goto out; + } + + fribidi_get_joining_types(unicodestr, len, ar_props); + fribidi_join_arabic(bidi_types, len, embedding_levels, ar_props); + fribidi_shape(flags, embedding_levels, len, ar_props, unicodestr); + + for (line_end = 0, line_start = 0; line_end < len; line_end++) { + if (is_newline(unicodestr[line_end]) || line_end == len - 1) { + if (!fribidi_reorder_line(flags, bidi_types, + line_end - line_start + 1, line_start, + direction, embedding_levels, unicodestr, + NULL)) { + goto out; + } + line_start = line_end + 1; + } + } + + /* Remove zero-width fill chars put in by libfribidi */ + for (i = 0, j = 0; i < len; i++) + if (unicodestr[i] != FRIBIDI_CHAR_FILL) + unicodestr[j++] = unicodestr[i]; + len = j; + + if (!(tmp = av_realloc(s->text, (len * 4 + 1) * sizeof(*s->text)))) { + /* Use len * 4, as a unicode character can be up to 4 bytes in UTF-8 */ + goto out; + } + + s->text = tmp; + len = fribidi_unicode_to_charset(FRIBIDI_CHAR_SET_UTF8, + unicodestr, len, s->text); + ret = 0; + +out: + av_free(unicodestr); + av_free(embedding_levels); + av_free(ar_props); + av_free(bidi_types); + return ret; } +#endif static av_cold int init(AVFilterContext *ctx) { @@ -380,57 +589,45 @@ static av_cold int init(AVFilterContext *ctx) DrawTextContext *s = ctx->priv; Glyph *glyph; - if ((err = parse_font(ctx)) < 0) - return err; + if (!s->fontfile && !CONFIG_LIBFONTCONFIG) { + av_log(ctx, AV_LOG_ERROR, "No font filename provided\n"); + return AVERROR(EINVAL); + } if (s->textfile) { - uint8_t *textbuf; - size_t textbuf_size; - if (s->text) { av_log(ctx, AV_LOG_ERROR, "Both text and text file provided. Please provide only one\n"); return AVERROR(EINVAL); } - if ((err = av_file_map(s->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { - av_log(ctx, AV_LOG_ERROR, - "The text file '%s' could not be read or is empty\n", - s->textfile); + if ((err = load_textfile(ctx)) < 0) return err; - } - - if (textbuf_size > SIZE_MAX - 1 || - !(s->text = av_malloc(textbuf_size + 1))) { - av_file_unmap(textbuf, textbuf_size); - return AVERROR(ENOMEM); - } - memcpy(s->text, textbuf, textbuf_size); - s->text[textbuf_size] = 0; - av_file_unmap(textbuf, textbuf_size); } - if (!s->text) { - av_log(ctx, AV_LOG_ERROR, - "Either text or a valid file must be provided\n"); - return AVERROR(EINVAL); - } +#if CONFIG_LIBFRIBIDI + if (s->text_shaping) + if ((err = shape_text(ctx)) < 0) + return err; +#endif - if ((err = av_parse_color(s->fontcolor_rgba, s->fontcolor_string, -1, ctx))) { - av_log(ctx, AV_LOG_ERROR, - "Invalid font color '%s'\n", s->fontcolor_string); - return err; - } + if (s->reload && !s->textfile) + av_log(ctx, AV_LOG_WARNING, "No file to reload\n"); - if ((err = av_parse_color(s->boxcolor_rgba, s->boxcolor_string, -1, ctx))) { - av_log(ctx, AV_LOG_ERROR, - "Invalid box color '%s'\n", s->boxcolor_string); - return err; + if (s->tc_opt_string) { + int ret = av_timecode_init_from_string(&s->tc, s->tc_rate, + s->tc_opt_string, ctx); + if (ret < 0) + return ret; + if (s->tc24hmax) + s->tc.flags |= AV_TIMECODE_FLAG_24HOURSMAX; + if (!s->text) + s->text = av_strdup(""); } - if ((err = av_parse_color(s->shadowcolor_rgba, s->shadowcolor_string, -1, ctx))) { + if (!s->text) { av_log(ctx, AV_LOG_ERROR, - "Invalid shadow color '%s'\n", s->shadowcolor_string); - return err; + "Either text, a valid file or a timecode must be provided\n"); + return AVERROR(EINVAL); } if ((err = FT_Init_FreeType(&(s->library)))) { @@ -439,55 +636,60 @@ static av_cold int init(AVFilterContext *ctx) return AVERROR(EINVAL); } - /* load the face, and set up the encoding, which is by default UTF-8 */ - if ((err = FT_New_Face(s->library, s->fontfile, 0, &s->face))) { - av_log(ctx, AV_LOG_ERROR, "Could not load fontface from file '%s': %s\n", - s->fontfile, FT_ERRMSG(err)); - return AVERROR(EINVAL); - } + err = load_font(ctx); + if (err) + return err; + if (!s->fontsize) + s->fontsize = 16; if ((err = FT_Set_Pixel_Sizes(s->face, 0, s->fontsize))) { av_log(ctx, AV_LOG_ERROR, "Could not set font size to %d pixels: %s\n", s->fontsize, FT_ERRMSG(err)); return AVERROR(EINVAL); } + if (s->borderw) { + if (FT_Stroker_New(s->library, &s->stroker)) { + av_log(ctx, AV_LOG_ERROR, "Coult not init FT stroker\n"); + return AVERROR_EXTERNAL; + } + FT_Stroker_Set(s->stroker, s->borderw << 6, FT_STROKER_LINECAP_ROUND, + FT_STROKER_LINEJOIN_ROUND, 0); + } + s->use_kerning = FT_HAS_KERNING(s->face); /* load the fallback glyph with code 0 */ 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; } s->tabsize *= glyph->advance; -#if !HAVE_LOCALTIME_R - av_log(ctx, AV_LOG_WARNING, "strftime() expansion unavailable!\n"); -#endif + if (s->exp_mode == EXP_STRFTIME && + (strchr(s->text, '%') || strchr(s->text, '\\'))) + av_log(ctx, AV_LOG_WARNING, "expansion=strftime is deprecated.\n"); + + av_bprint_init(&s->expanded_text, 0, AV_BPRINT_SIZE_UNLIMITED); + av_bprint_init(&s->expanded_fontcolor, 0, AV_BPRINT_SIZE_UNLIMITED); return 0; } static int query_formats(AVFilterContext *ctx) { - static const enum AVPixelFormat pix_fmts[] = { - AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, - AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, - AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, - AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P, - AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV411P, - AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P, - AV_PIX_FMT_NONE - }; - - ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); + ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); return 0; } static int glyph_enu_free(void *opaque, void *elem) { + Glyph *glyph = elem; + + FT_Done_Glyph(glyph->glyph); + FT_Done_Glyph(glyph->border_glyph); av_free(elem); return 0; } @@ -495,325 +697,370 @@ static int glyph_enu_free(void *opaque, void *elem) static av_cold void uninit(AVFilterContext *ctx) { DrawTextContext *s = ctx->priv; - int i; av_expr_free(s->x_pexpr); av_expr_free(s->y_pexpr); - av_expr_free(s->d_pexpr); - s->x_pexpr = s->y_pexpr = s->d_pexpr = NULL; - av_freep(&s->expanded_text); + s->x_pexpr = s->y_pexpr = NULL; av_freep(&s->positions); + s->nb_positions = 0; + + av_tree_enumerate(s->glyphs, NULL, NULL, glyph_enu_free); av_tree_destroy(s->glyphs); - s->glyphs = 0; + s->glyphs = NULL; + FT_Done_Face(s->face); + FT_Stroker_Done(s->stroker); FT_Done_FreeType(s->library); - for (i = 0; i < 4; i++) { - av_freep(&s->box_line[i]); - s->pixel_step[i] = 0; - } - + av_bprint_finalize(&s->expanded_text, NULL); + av_bprint_finalize(&s->expanded_fontcolor, NULL); } -static inline int is_newline(uint32_t c) -{ - return c == '\n' || c == '\r' || c == '\f' || c == '\v'; -} - -static int dtext_prepare_text(AVFilterContext *ctx) +static int config_input(AVFilterLink *inlink) { + AVFilterContext *ctx = inlink->dst; DrawTextContext *s = ctx->priv; - uint32_t code = 0, prev_code = 0; - int x = 0, y = 0, i = 0, ret; - int text_height, baseline; - char *text = s->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; - time_t now = time(0); - struct tm ltime; - uint8_t *buf = s->expanded_text; - int buf_size = s->expanded_text_size; + int ret; - if (!buf) - buf_size = 2*strlen(s->text)+1; + ff_draw_init(&s->dc, inlink->format, 0); + ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); + ff_draw_color(&s->dc, &s->shadowcolor, s->shadowcolor.rgba); + ff_draw_color(&s->dc, &s->bordercolor, s->bordercolor.rgba); + ff_draw_color(&s->dc, &s->boxcolor, s->boxcolor.rgba); + + s->var_values[VAR_w] = s->var_values[VAR_W] = s->var_values[VAR_MAIN_W] = inlink->w; + s->var_values[VAR_h] = s->var_values[VAR_H] = s->var_values[VAR_MAIN_H] = inlink->h; + s->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1; + s->var_values[VAR_DAR] = (double)inlink->w / inlink->h * s->var_values[VAR_SAR]; + s->var_values[VAR_HSUB] = 1 << s->dc.hsub_max; + s->var_values[VAR_VSUB] = 1 << s->dc.vsub_max; + s->var_values[VAR_X] = NAN; + s->var_values[VAR_Y] = NAN; + s->var_values[VAR_T] = NAN; - localtime_r(&now, <ime); + av_lfg_init(&s->prng, av_get_random_seed()); - while ((buf = av_realloc(buf, buf_size))) { - *buf = 1; - if (strftime(buf, buf_size, s->text, <ime) != 0 || *buf == 0) - break; - buf_size *= 2; - } + av_expr_free(s->x_pexpr); + av_expr_free(s->y_pexpr); + s->x_pexpr = s->y_pexpr = NULL; - if (!buf) - return AVERROR(ENOMEM); - text = s->expanded_text = buf; - s->expanded_text_size = buf_size; - - if ((len = strlen(text)) > s->nb_positions) { - FT_Vector *p = av_realloc(s->positions, - len * sizeof(*s->positions)); - if (!p) { - av_freep(s->positions); - s->nb_positions = 0; - return AVERROR(ENOMEM); - } else { - s->positions = p; - s->nb_positions = len; - } - } + if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names, + NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || + (ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names, + NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) - /* load and cache glyphs */ - for (i = 0, p = text; *p; i++) { - GET_UTF8(code, *p++, continue;); + return AVERROR(EINVAL); - /* get glyph */ - dummy.code = code; - glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); - if (!glyph) { - ret = load_glyph(ctx, &glyph, code); - if (ret) - return ret; - } + return 0; +} - y_min = FFMIN(glyph->bbox.yMin, y_min); - y_max = FFMAX(glyph->bbox.yMax, y_max); +static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags) +{ + DrawTextContext *s = ctx->priv; + + if (!strcmp(cmd, "reinit")) { + int ret; + uninit(ctx); + s->reinit = 1; + if ((ret = av_set_options_string(ctx, arg, "=", ":")) < 0) + return ret; + if ((ret = init(ctx)) < 0) + return ret; + return config_input(ctx->inputs[0]); } - 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;); + return AVERROR(ENOSYS); +} - /* skip the \n in the sequence \r\n */ - if (prev_code == '\r' && code == '\n') - continue; +static int func_pict_type(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + DrawTextContext *s = ctx->priv; - prev_code = code; - if (is_newline(code)) { - str_w = FFMAX(str_w, x - s->x); - y += text_height; - x = 0; - continue; - } + av_bprintf(bp, "%c", av_get_picture_type_char(s->var_values[VAR_PICT_TYPE])); + return 0; +} - /* get glyph */ - prev_glyph = glyph; - dummy.code = code; - glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); +static int func_pts(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + DrawTextContext *s = ctx->priv; + const char *fmt; + double pts = s->var_values[VAR_T]; + int ret; - /* kerning */ - if (s->use_kerning && prev_glyph && glyph->code) { - FT_Get_Kerning(s->face, prev_glyph->code, glyph->code, - ft_kerning_default, &delta); - x += delta.x >> 6; + fmt = argc >= 1 ? argv[0] : "flt"; + if (argc >= 2) { + int64_t delta; + if ((ret = av_parse_time(&delta, argv[1], 1)) < 0) { + av_log(ctx, AV_LOG_ERROR, "Invalid delta '%s'\n", argv[1]); + return ret; } - - if (x + glyph->bbox.xMax >= width) { - str_w = FFMAX(str_w, x); - y += text_height; - x = 0; + pts += (double)delta / AV_TIME_BASE; + } + if (!strcmp(fmt, "flt")) { + av_bprintf(bp, "%.6f", s->var_values[VAR_T]); + } else if (!strcmp(fmt, "hms")) { + if (isnan(pts)) { + av_bprintf(bp, " ??:??:??.???"); + } else { + int64_t ms = round(pts * 1000); + char sign = ' '; + if (ms < 0) { + sign = '-'; + ms = -ms; + } + av_bprintf(bp, "%c%02d:%02d:%02d.%03d", sign, + (int)(ms / (60 * 60 * 1000)), + (int)(ms / (60 * 1000)) % 60, + (int)(ms / 1000) % 60, + (int)ms % 1000); } - - /* save position */ - s->positions[i].x = x + glyph->bitmap_left; - s->positions[i].y = y - glyph->bitmap_top + baseline; - if (code == '\t') x = (x / s->tabsize + 1)*s->tabsize; - else x += glyph->advance; + } else { + av_log(ctx, AV_LOG_ERROR, "Invalid format '%s'\n", fmt); + return AVERROR(EINVAL); } + return 0; +} - str_w = FFMIN(width - 1, FFMAX(str_w, x)); - y = FFMIN(y + text_height, height - 1); +static int func_frame_num(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + DrawTextContext *s = ctx->priv; + + av_bprintf(bp, "%d", (int)s->var_values[VAR_N]); + return 0; +} - s->w = str_w; - s->var_values[VAR_TEXT_W] = s->var_values[VAR_TW] = s->w; - s->h = y; - s->var_values[VAR_TEXT_H] = s->var_values[VAR_TH] = s->h; +static int func_metadata(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + DrawTextContext *s = ctx->priv; + AVDictionaryEntry *e = av_dict_get(s->metadata, argv[0], NULL, 0); + if (e && e->value) + av_bprintf(bp, "%s", e->value); return 0; } +static int func_strftime(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + const char *fmt = argc ? argv[0] : "%Y-%m-%d %H:%M:%S"; + time_t now; + struct tm tm; -static int config_input(AVFilterLink *inlink) + time(&now); + if (tag == 'L') + localtime_r(&now, &tm); + else + tm = *gmtime_r(&now, &tm); + av_bprint_strftime(bp, fmt, &tm); + return 0; +} + +static int func_eval_expr(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) { - AVFilterContext *ctx = inlink->dst; DrawTextContext *s = ctx->priv; - const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); + double res; int ret; - s->hsub = pix_desc->log2_chroma_w; - s->vsub = pix_desc->log2_chroma_h; + ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, + NULL, NULL, fun2_names, fun2, + &s->prng, 0, ctx); + if (ret < 0) + av_log(ctx, AV_LOG_ERROR, + "Expression '%s' for the expr text expansion function is not valid\n", + argv[0]); + else + av_bprintf(bp, "%f", res); - s->var_values[VAR_E ] = M_E; - s->var_values[VAR_PHI] = M_PHI; - s->var_values[VAR_PI ] = M_PI; + return ret; +} - s->var_values[VAR_MAIN_W] = - s->var_values[VAR_MW] = ctx->inputs[0]->w; - s->var_values[VAR_MAIN_H] = - s->var_values[VAR_MH] = ctx->inputs[0]->h; +static int func_eval_expr_int_format(AVFilterContext *ctx, AVBPrint *bp, + char *fct, unsigned argc, char **argv, int tag) +{ + DrawTextContext *s = ctx->priv; + double res; + int intval; + int ret; + unsigned int positions = 0; + char fmt_str[30] = "%"; + + /* + * argv[0] expression to be converted to `int` + * argv[1] format: 'x', 'X', 'd' or 'u' + * argv[2] positions printed (optional) + */ + + ret = av_expr_parse_and_eval(&res, argv[0], var_names, s->var_values, + NULL, NULL, fun2_names, fun2, + &s->prng, 0, ctx); + if (ret < 0) { + av_log(ctx, AV_LOG_ERROR, + "Expression '%s' for the expr text expansion function is not valid\n", + argv[0]); + return ret; + } - s->var_values[VAR_X] = 0; - s->var_values[VAR_Y] = 0; - s->var_values[VAR_T] = NAN; + if (!strchr("xXdu", argv[1][0])) { + av_log(ctx, AV_LOG_ERROR, "Invalid format '%c' specified," + " allowed values: 'x', 'X', 'd', 'u'\n", argv[1][0]); + return AVERROR(EINVAL); + } - av_lfg_init(&s->prng, av_get_random_seed()); + if (argc == 3) { + ret = sscanf(argv[2], "%u", &positions); + if (ret != 1) { + av_log(ctx, AV_LOG_ERROR, "expr_int_format(): Invalid number of positions" + " to print: '%s'\n", argv[2]); + return AVERROR(EINVAL); + } + } - av_expr_free(s->x_pexpr); - av_expr_free(s->y_pexpr); - av_expr_free(s->d_pexpr); - s->x_pexpr = s->y_pexpr = s->d_pexpr = NULL; - if ((ret = av_expr_parse(&s->x_pexpr, s->x_expr, var_names, - NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || - (ret = av_expr_parse(&s->y_pexpr, s->y_expr, var_names, - NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 || - (ret = av_expr_parse(&s->d_pexpr, s->d_expr, var_names, - NULL, NULL, fun2_names, fun2, 0, ctx)) < 0) + feclearexcept(FE_ALL_EXCEPT); + intval = res; + if ((ret = fetestexcept(FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW))) { + av_log(ctx, AV_LOG_ERROR, "Conversion of floating-point result to int failed. Control register: 0x%08x. Conversion result: %d\n", ret, intval); return AVERROR(EINVAL); + } - if ((ret = - ff_fill_line_with_color(s->box_line, s->pixel_step, - inlink->w, s->boxcolor, - inlink->format, s->boxcolor_rgba, - &s->is_packed_rgb, s->rgba_map)) < 0) - return ret; + if (argc == 3) + av_strlcatf(fmt_str, sizeof(fmt_str), "0%u", positions); + av_strlcatf(fmt_str, sizeof(fmt_str), "%c", argv[1][0]); - if (!s->is_packed_rgb) { - uint8_t *rgba = s->fontcolor_rgba; - s->fontcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); - s->fontcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); - s->fontcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); - s->fontcolor[3] = rgba[3]; - rgba = s->shadowcolor_rgba; - s->shadowcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]); - s->shadowcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0); - s->shadowcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0); - s->shadowcolor[3] = rgba[3]; - } + av_log(ctx, AV_LOG_DEBUG, "Formatting value %f (expr '%s') with spec '%s'\n", + res, argv[0], fmt_str); - s->draw = 1; + av_bprintf(bp, fmt_str, intval); - return dtext_prepare_text(ctx); + return 0; } -#define GET_BITMAP_VAL(r, c) \ - bitmap->pixel_mode == FT_PIXEL_MODE_MONO ? \ - (bitmap->buffer[(r) * bitmap->pitch + ((c)>>3)] & (0x80 >> ((c)&7))) * 255 : \ - bitmap->buffer[(r) * bitmap->pitch + (c)] - -#define SET_PIXEL_YUV(frame, yuva_color, val, x, y, hsub, vsub) { \ - luma_pos = ((x) ) + ((y) ) * frame->linesize[0]; \ - alpha = yuva_color[3] * (val) * 129; \ - frame->data[0][luma_pos] = (alpha * yuva_color[0] + (255*255*129 - alpha) * frame->data[0][luma_pos] ) >> 23; \ - if (((x) & ((1<<(hsub)) - 1)) == 0 && ((y) & ((1<<(vsub)) - 1)) == 0) {\ - chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * frame->linesize[1]; \ - chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * frame->linesize[2]; \ - frame->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255*255*129 - alpha) * frame->data[1][chroma_pos1]) >> 23; \ - frame->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255*255*129 - alpha) * frame->data[2][chroma_pos2]) >> 23; \ - }\ -} +static const struct drawtext_function { + const char *name; + unsigned argc_min, argc_max; + int tag; /**< opaque argument to func */ + int (*func)(AVFilterContext *, AVBPrint *, char *, unsigned, char **, int); +} functions[] = { + { "expr", 1, 1, 0, func_eval_expr }, + { "e", 1, 1, 0, func_eval_expr }, + { "expr_int_format", 2, 3, 0, func_eval_expr_int_format }, + { "eif", 2, 3, 0, func_eval_expr_int_format }, + { "pict_type", 0, 0, 0, func_pict_type }, + { "pts", 0, 2, 0, func_pts }, + { "gmtime", 0, 1, 'G', func_strftime }, + { "localtime", 0, 1, 'L', func_strftime }, + { "frame_num", 0, 0, 0, func_frame_num }, + { "n", 0, 0, 0, func_frame_num }, + { "metadata", 1, 1, 0, func_metadata }, +}; -static inline int draw_glyph_yuv(AVFrame *frame, FT_Bitmap *bitmap, unsigned int x, - unsigned int y, unsigned int width, unsigned int height, - const uint8_t yuva_color[4], int hsub, int vsub) +static int eval_function(AVFilterContext *ctx, AVBPrint *bp, char *fct, + unsigned argc, char **argv) { - int r, c, alpha; - unsigned int luma_pos, chroma_pos1, chroma_pos2; - 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 intensity value in the glyph bitmap (source) */ - src_val = GET_BITMAP_VAL(r, c); - if (!src_val) - continue; - - SET_PIXEL_YUV(frame, yuva_color, src_val, c+x, y+r, hsub, vsub); + unsigned i; + + for (i = 0; i < FF_ARRAY_ELEMS(functions); i++) { + if (strcmp(fct, functions[i].name)) + continue; + if (argc < functions[i].argc_min) { + av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at least %d arguments\n", + fct, functions[i].argc_min); + return AVERROR(EINVAL); } + if (argc > functions[i].argc_max) { + av_log(ctx, AV_LOG_ERROR, "%%{%s} requires at most %d arguments\n", + fct, functions[i].argc_max); + return AVERROR(EINVAL); + } + break; } - - return 0; -} - -#define SET_PIXEL_RGB(frame, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off, a_off) { \ - p = frame->data[0] + (x) * pixel_step + ((y) * frame->linesize[0]); \ - alpha = rgba_color[3] * (val) * 129; \ - *(p+r_off) = (alpha * rgba_color[0] + (255*255*129 - alpha) * *(p+r_off)) >> 23; \ - *(p+g_off) = (alpha * rgba_color[1] + (255*255*129 - alpha) * *(p+g_off)) >> 23; \ - *(p+b_off) = (alpha * rgba_color[2] + (255*255*129 - alpha) * *(p+b_off)) >> 23; \ + if (i >= FF_ARRAY_ELEMS(functions)) { + av_log(ctx, AV_LOG_ERROR, "%%{%s} is not known\n", fct); + return AVERROR(EINVAL); + } + return functions[i].func(ctx, bp, fct, argc, argv, functions[i].tag); } -static inline int draw_glyph_rgb(AVFrame *frame, FT_Bitmap *bitmap, - unsigned int x, unsigned int y, - unsigned int width, unsigned int height, int pixel_step, - const uint8_t rgba_color[4], const uint8_t rgba_map[4]) +static int expand_function(AVFilterContext *ctx, AVBPrint *bp, char **rtext) { - int r, c, alpha; - uint8_t *p; - 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 intensity value in the glyph bitmap (source) */ - src_val = GET_BITMAP_VAL(r, c); - if (!src_val) - continue; + const char *text = *rtext; + char *argv[16] = { NULL }; + unsigned argc = 0, i; + int ret; - SET_PIXEL_RGB(frame, rgba_color, src_val, c+x, y+r, pixel_step, - rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]); + if (*text != '{') { + av_log(ctx, AV_LOG_ERROR, "Stray %% near '%s'\n", text); + return AVERROR(EINVAL); + } + text++; + while (1) { + if (!(argv[argc++] = av_get_token(&text, ":}"))) { + ret = AVERROR(ENOMEM); + goto end; + } + if (!*text) { + av_log(ctx, AV_LOG_ERROR, "Unterminated %%{} near '%s'\n", *rtext); + ret = AVERROR(EINVAL); + goto end; } + if (argc == FF_ARRAY_ELEMS(argv)) + av_freep(&argv[--argc]); /* error will be caught later */ + if (*text == '}') + break; + text++; } - return 0; + if ((ret = eval_function(ctx, bp, argv[0], argc - 1, argv + 1)) < 0) + goto end; + ret = 0; + *rtext = (char *)text + 1; + +end: + for (i = 0; i < argc; i++) + av_freep(&argv[i]); + return ret; } -static inline void drawbox(AVFrame *frame, unsigned int x, unsigned int y, - unsigned int width, unsigned 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 int expand_text(AVFilterContext *ctx, char *text, AVBPrint *bp) { - int i, j, alpha; - - if (color[3] != 0xFF) { - if (is_rgba_packed) { - uint8_t *p; - for (j = 0; j < height; j++) - for (i = 0; i < width; i++) - SET_PIXEL_RGB(frame, color, 255, i+x, y+j, pixel_step[0], - rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]); + int ret; + + av_bprint_clear(bp); + while (*text) { + if (*text == '\\' && text[1]) { + av_bprint_chars(bp, text[1], 1); + text += 2; + } else if (*text == '%') { + text++; + if ((ret = expand_function(ctx, bp, &text)) < 0) + return ret; } else { - unsigned int luma_pos, chroma_pos1, chroma_pos2; - for (j = 0; j < height; j++) - for (i = 0; i < width; i++) - SET_PIXEL_YUV(frame, color, 255, i+x, y+j, hsub, vsub); + av_bprint_chars(bp, *text, 1); + text++; } - } else { - ff_draw_rectangle(frame->data, frame->linesize, - line, pixel_step, hsub, vsub, - x, y, width, height); } + if (!av_bprint_is_complete(bp)) + return AVERROR(ENOMEM); + return 0; } static int draw_glyphs(DrawTextContext *s, AVFrame *frame, - int width, int height, const uint8_t rgbcolor[4], const uint8_t yuvcolor[4], int x, int y) + int width, int height, + FFDrawColor *color, int x, int y, int borderw) { - char *text = HAVE_LOCALTIME_R ? s->expanded_text : s->text; + char *text = s->expanded_text.str; uint32_t code = 0; - int i; + int i, x1, y1; uint8_t *p; Glyph *glyph = NULL; for (i = 0, p = text; *p; i++) { + FT_Bitmap bitmap; Glyph dummy = { 0 }; GET_UTF8(code, *p++, continue;); @@ -824,19 +1071,21 @@ static int draw_glyphs(DrawTextContext *s, AVFrame *frame, dummy.code = code; glyph = av_tree_find(s->glyphs, &dummy, (void *)glyph_cmp, NULL); + bitmap = borderw ? glyph->border_bitmap : glyph->bitmap; + if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO && glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY) return AVERROR(EINVAL); - if (s->is_packed_rgb) { - draw_glyph_rgb(frame, &glyph->bitmap, - s->positions[i].x+x, s->positions[i].y+y, width, height, - s->pixel_step[0], rgbcolor, s->rgba_map); - } else { - draw_glyph_yuv(frame, &glyph->bitmap, - s->positions[i].x+x, s->positions[i].y+y, width, height, - yuvcolor, s->hsub, s->vsub); - } + x1 = s->positions[i].x+s->x+x - borderw; + y1 = s->positions[i].y+s->y+y - borderw; + + ff_blend_mask(&s->dc, color, + frame->data, frame->linesize, width, height, + bitmap.buffer, bitmap.pitch, + bitmap.width, bitmap.rows, + bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 0 : 3, + 0, x1, y1); } return 0; @@ -846,107 +1095,217 @@ static int draw_text(AVFilterContext *ctx, AVFrame *frame, int width, int height) { DrawTextContext *s = ctx->priv; - int ret; + AVFilterLink *inlink = ctx->inputs[0]; + + 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; + 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 }; + + time_t now = time(0); + struct tm ltime; + AVBPrint *bp = &s->expanded_text; + + av_bprint_clear(bp); + + if(s->basetime != AV_NOPTS_VALUE) + now= frame->pts*av_q2d(ctx->inputs[0]->time_base) + s->basetime/1000000; + + switch (s->exp_mode) { + case EXP_NONE: + av_bprintf(bp, "%s", s->text); + break; + case EXP_NORMAL: + if ((ret = expand_text(ctx, s->text, &s->expanded_text)) < 0) + return ret; + break; + case EXP_STRFTIME: + localtime_r(&now, <ime); + av_bprint_strftime(bp, s->text, <ime); + break; + } + + if (s->tc_opt_string) { + char tcbuf[AV_TIMECODE_STR_SIZE]; + av_timecode_make_string(&s->tc, tcbuf, inlink->frame_count); + av_bprint_clear(bp); + av_bprintf(bp, "%s%s", s->text, tcbuf); + } + + if (!av_bprint_is_complete(bp)) + return AVERROR(ENOMEM); + text = s->expanded_text.str; + if ((len = s->expanded_text.len) > s->nb_positions) { + if (!(s->positions = + av_realloc(s->positions, len*sizeof(*s->positions)))) + return AVERROR(ENOMEM); + s->nb_positions = len; + } + + if (s->fontcolor_expr[0]) { + /* If expression is set, evaluate and replace the static value */ + av_bprint_clear(&s->expanded_fontcolor); + if ((ret = expand_text(ctx, s->fontcolor_expr, &s->expanded_fontcolor)) < 0) + return ret; + if (!av_bprint_is_complete(&s->expanded_fontcolor)) + return AVERROR(ENOMEM); + av_log(s, AV_LOG_DEBUG, "Evaluated fontcolor is '%s'\n", s->expanded_fontcolor.str); + ret = av_parse_color(s->fontcolor.rgba, s->expanded_fontcolor.str, -1, s); + if (ret) + return ret; + ff_draw_color(&s->dc, &s->fontcolor, s->fontcolor.rgba); + } + + x = 0; + y = 0; + + /* 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(s->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); + } + s->max_glyph_h = y_max - y_min; + s->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 += s->max_glyph_h; + x = 0; + continue; + } + + /* get glyph */ + prev_glyph = glyph; + dummy.code = code; + glyph = av_tree_find(s->glyphs, &dummy, glyph_cmp, NULL); + + /* kerning */ + if (s->use_kerning && prev_glyph && glyph->code) { + FT_Get_Kerning(s->face, prev_glyph->code, glyph->code, + ft_kerning_default, &delta); + x += delta.x >> 6; + } + + /* save position */ + s->positions[i].x = x + glyph->bitmap_left; + s->positions[i].y = y - glyph->bitmap_top + y_max; + if (code == '\t') x = (x / s->tabsize + 1)*s->tabsize; + else x += glyph->advance; + } + + max_text_line_w = FFMAX(x, max_text_line_w); + + s->var_values[VAR_TW] = s->var_values[VAR_TEXT_W] = max_text_line_w; + s->var_values[VAR_TH] = s->var_values[VAR_TEXT_H] = y + s->max_glyph_h; + + s->var_values[VAR_MAX_GLYPH_W] = s->max_glyph_w; + s->var_values[VAR_MAX_GLYPH_H] = s->max_glyph_h; + s->var_values[VAR_MAX_GLYPH_A] = s->var_values[VAR_ASCENT ] = y_max; + s->var_values[VAR_MAX_GLYPH_D] = s->var_values[VAR_DESCENT] = y_min; + + s->var_values[VAR_LINE_H] = s->var_values[VAR_LH] = s->max_glyph_h; + + s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); + s->y = s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, &s->prng); + s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng); + + box_w = FFMIN(width - 1 , max_text_line_w); + box_h = FFMIN(height - 1, y + s->max_glyph_h); /* draw box */ if (s->draw_box) - drawbox(frame, s->x, s->y, s->w, s->h, - s->box_line, s->pixel_step, s->boxcolor, - s->hsub, s->vsub, s->is_packed_rgb, - s->rgba_map); + ff_blend_rectangle(&s->dc, &s->boxcolor, + frame->data, frame->linesize, width, height, + s->x, s->y, box_w, box_h); if (s->shadowx || s->shadowy) { if ((ret = draw_glyphs(s, frame, width, height, - s->shadowcolor_rgba, - s->shadowcolor, - s->x + s->shadowx, - s->y + s->shadowy)) < 0) + &s->shadowcolor, s->shadowx, s->shadowy, 0)) < 0) return ret; } + if (s->borderw) { + if ((ret = draw_glyphs(s, frame, width, height, + &s->bordercolor, 0, 0, s->borderw)) < 0) + return ret; + } if ((ret = draw_glyphs(s, frame, width, height, - s->fontcolor_rgba, - s->fontcolor, - s->x, - s->y)) < 0) + &s->fontcolor, 0, 0, 0)) < 0) return ret; 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 filter_frame(AVFilterLink *inlink, AVFrame *frame) { AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; DrawTextContext *s = ctx->priv; - int ret = 0; + int ret; - if ((ret = dtext_prepare_text(ctx)) < 0) { - av_log(ctx, AV_LOG_ERROR, "Can't draw text\n"); - av_frame_free(&frame); - return ret; + if (s->reload) { + if ((ret = load_textfile(ctx)) < 0) + return ret; +#if CONFIG_LIBFRIBIDI + if (s->text_shaping) + if ((ret = shape_text(ctx)) < 0) + return ret; +#endif } + s->var_values[VAR_N] = inlink->frame_count+s->start_number; s->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ? NAN : frame->pts * av_q2d(inlink->time_base); - s->var_values[VAR_X] = - av_expr_eval(s->x_pexpr, s->var_values, &s->prng); - s->var_values[VAR_Y] = - av_expr_eval(s->y_pexpr, s->var_values, &s->prng); - s->var_values[VAR_X] = - av_expr_eval(s->x_pexpr, s->var_values, &s->prng); - s->draw = av_expr_eval(s->d_pexpr, s->var_values, &s->prng); + s->var_values[VAR_PICT_TYPE] = frame->pict_type; + s->metadata = av_frame_get_metadata(frame); - normalize_double(&s->x, s->var_values[VAR_X]); - normalize_double(&s->y, s->var_values[VAR_Y]); + draw_text(ctx, frame, frame->width, frame->height); - if (s->fix_bounds) { - if (s->x < 0) s->x = 0; - if (s->y < 0) s->y = 0; - if ((unsigned)s->x + (unsigned)s->w > inlink->w) - s->x = inlink->w - s->w; - if ((unsigned)s->y + (unsigned)s->h > inlink->h) - s->y = inlink->h - s->h; - } - - s->x &= ~((1 << s->hsub) - 1); - s->y &= ~((1 << s->vsub) - 1); - - av_dlog(ctx, "n:%d t:%f x:%d y:%d x+w:%d y+h:%d\n", - (int)s->var_values[VAR_N], s->var_values[VAR_T], - s->x, s->y, s->x+s->w, s->y+s->h); + av_log(ctx, AV_LOG_DEBUG, "n:%d t:%f text_w:%d text_h:%d x:%d y:%d\n", + (int)s->var_values[VAR_N], s->var_values[VAR_T], + (int)s->var_values[VAR_TEXT_W], (int)s->var_values[VAR_TEXT_H], + s->x, s->y); - if (s->draw) - draw_text(inlink->dst, frame, frame->width, frame->height); - - s->var_values[VAR_N] += 1.0; - - return ff_filter_frame(inlink->dst->outputs[0], frame); + return ff_filter_frame(outlink, frame); } static const AVFilterPad avfilter_vf_drawtext_inputs[] = { { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - .get_video_buffer = ff_null_get_video_buffer, - .filter_frame = filter_frame, - .config_props = config_input, - .needs_writable = 1, + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + .needs_writable = 1, }, { NULL } }; @@ -967,7 +1326,8 @@ AVFilter ff_vf_drawtext = { .init = init, .uninit = uninit, .query_formats = query_formats, - - .inputs = avfilter_vf_drawtext_inputs, - .outputs = avfilter_vf_drawtext_outputs, + .inputs = avfilter_vf_drawtext_inputs, + .outputs = avfilter_vf_drawtext_outputs, + .process_command = command, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, }; |