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-rw-r--r--libavfilter/vf_drawtext.c1030
1 files changed, 601 insertions, 429 deletions
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index 90625a32a2..ef5bb03be4 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
*/
@@ -29,15 +29,16 @@
#include <sys/time.h>
#include <time.h>
-#include "libavutil/colorspace.h"
+#include "config.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/tree.h"
#include "libavutil/lfg.h"
#include "avfilter.h"
@@ -50,19 +51,28 @@
#include <freetype/config/ftheader.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
+#if CONFIG_FONTCONFIG
+#include <fontconfig/fontconfig.h>
+#endif
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
};
@@ -83,86 +93,114 @@ 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 {
const AVClass *class;
+ enum expansion_mode exp_mode; ///< expansion mode to use for the text
+ 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
- size_t expanded_text_size; ///< size in bytes of the expanded_text buffer
+ AVBPrint expanded_text; ///< used to contain the expanded text
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;
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 boxcolor; ///< background color
+
FT_Library library; ///< freetype font library handle
FT_Face face; ///< freetype font face 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;
+ char *draw_expr; ///< expression for draw
+ AVExpr *draw_pexpr; ///< parsed expression for draw
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
} 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", 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 },
+ {"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_string), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, FLAGS},
+ {"boxcolor", "set box color", OFFSET(boxcolor_string), AV_OPT_TYPE_STRING, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS},
+ {"shadowcolor", "set shadow color", OFFSET(shadowcolor_string), AV_OPT_TYPE_STRING, {.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},
+ {"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},
+ {"draw", "if false do not draw", OFFSET(draw_expr), AV_OPT_TYPE_STRING, {.str="1"}, CHAR_MIN, CHAR_MAX, 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},
/* 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" },
@@ -184,16 +222,7 @@ static const AVOption drawtext_options[]= {
{ 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 {
@@ -280,59 +309,168 @@ error:
return ret;
}
+static int load_font_file(AVFilterContext *ctx, const char *path, int index,
+ const char **error)
+{
+ DrawTextContext *dtext = ctx->priv;
+ int err;
+
+ err = FT_New_Face(dtext->library, path, index, &dtext->face);
+ if (err) {
+ *error = FT_ERRMSG(err);
+ return AVERROR(EINVAL);
+ }
+ return 0;
+}
+
+#if CONFIG_FONTCONFIG
+static int load_font_fontconfig(AVFilterContext *ctx, const char **error)
+{
+ DrawTextContext *dtext = ctx->priv;
+ FcConfig *fontconfig;
+ FcPattern *pattern, *fpat;
+ FcResult result = FcResultMatch;
+ FcChar8 *filename;
+ int err, index;
+ double size;
+
+ fontconfig = FcInitLoadConfigAndFonts();
+ if (!fontconfig) {
+ *error = "impossible to init fontconfig\n";
+ return AVERROR(EINVAL);
+ }
+ pattern = FcNameParse(dtext->fontfile ? dtext->fontfile :
+ (uint8_t *)(intptr_t)"default");
+ if (!pattern) {
+ *error = "could not parse fontconfig pattern";
+ return AVERROR(EINVAL);
+ }
+ if (!FcConfigSubstitute(fontconfig, pattern, FcMatchPattern)) {
+ *error = "could not substitue fontconfig options"; /* very unlikely */
+ return AVERROR(EINVAL);
+ }
+ FcDefaultSubstitute(pattern);
+ fpat = FcFontMatch(fontconfig, pattern, &result);
+ if (!fpat || result != FcResultMatch) {
+ *error = "impossible to find a matching font";
+ return AVERROR(EINVAL);
+ }
+ if (FcPatternGetString (fpat, FC_FILE, 0, &filename) != FcResultMatch ||
+ FcPatternGetInteger(fpat, FC_INDEX, 0, &index ) != FcResultMatch ||
+ FcPatternGetDouble (fpat, FC_SIZE, 0, &size ) != FcResultMatch) {
+ *error = "impossible to find font information";
+ return AVERROR(EINVAL);
+ }
+ av_log(ctx, AV_LOG_INFO, "Using \"%s\"\n", filename);
+ if (!dtext->fontsize)
+ dtext->fontsize = size + 0.5;
+ err = load_font_file(ctx, filename, index, error);
+ if (err)
+ return err;
+ FcPatternDestroy(fpat);
+ FcPatternDestroy(pattern);
+ FcConfigDestroy(fontconfig);
+ return 0;
+}
+#endif
+
+static int load_font(AVFilterContext *ctx)
+{
+ DrawTextContext *dtext = ctx->priv;
+ int err;
+ const char *error = "unknown error\n";
+
+ /* load the face, and set up the encoding, which is by default UTF-8 */
+ err = load_font_file(ctx, dtext->fontfile, 0, &error);
+ if (!err)
+ return 0;
+#if CONFIG_FONTCONFIG
+ err = load_font_fontconfig(ctx, &error);
+ if (!err)
+ return 0;
+#endif
+ av_log(ctx, AV_LOG_ERROR, "Could not load font \"%s\": %s\n",
+ dtext->fontfile, error);
+ return err;
+}
+
+static int load_textfile(AVFilterContext *ctx)
+{
+ DrawTextContext *dtext = ctx->priv;
+ int err;
+ uint8_t *textbuf;
+ size_t textbuf_size;
+
+ if ((err = av_file_map(dtext->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",
+ dtext->textfile);
+ return err;
+ }
+
+ if (!(dtext->text = av_realloc(dtext->text, textbuf_size + 1)))
+ return AVERROR(ENOMEM);
+ memcpy(dtext->text, textbuf, textbuf_size);
+ dtext->text[textbuf_size] = 0;
+ av_file_unmap(textbuf, textbuf_size);
+
+ return 0;
+}
+
static av_cold int init(AVFilterContext *ctx)
{
int err;
DrawTextContext *dtext = ctx->priv;
Glyph *glyph;
- if (!dtext->fontfile) {
+ if (!dtext->fontfile && !CONFIG_FONTCONFIG) {
av_log(ctx, AV_LOG_ERROR, "No font filename provided\n");
return AVERROR(EINVAL);
}
if (dtext->textfile) {
- uint8_t *textbuf;
- size_t textbuf_size;
-
if (dtext->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(dtext->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",
- dtext->textfile);
+ if ((err = load_textfile(ctx)) < 0)
return err;
- }
+ }
- if (!(dtext->text = av_malloc(textbuf_size+1)))
- return AVERROR(ENOMEM);
- memcpy(dtext->text, textbuf, textbuf_size);
- dtext->text[textbuf_size] = 0;
- av_file_unmap(textbuf, textbuf_size);
+ if (dtext->reload && !dtext->textfile)
+ av_log(ctx, AV_LOG_WARNING, "No file to reload\n");
+
+ if (dtext->tc_opt_string) {
+ int ret = av_timecode_init_from_string(&dtext->tc, dtext->tc_rate,
+ dtext->tc_opt_string, ctx);
+ if (ret < 0)
+ return ret;
+ if (dtext->tc24hmax)
+ dtext->tc.flags |= AV_TIMECODE_FLAG_24HOURSMAX;
+ 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);
}
- if ((err = av_parse_color(dtext->fontcolor_rgba, dtext->fontcolor_string, -1, ctx))) {
+ if ((err = av_parse_color(dtext->fontcolor.rgba, dtext->fontcolor_string, -1, ctx))) {
av_log(ctx, AV_LOG_ERROR,
"Invalid font color '%s'\n", dtext->fontcolor_string);
return err;
}
- if ((err = av_parse_color(dtext->boxcolor_rgba, dtext->boxcolor_string, -1, ctx))) {
+ if ((err = av_parse_color(dtext->boxcolor.rgba, dtext->boxcolor_string, -1, ctx))) {
av_log(ctx, AV_LOG_ERROR,
"Invalid box color '%s'\n", dtext->boxcolor_string);
return err;
}
- if ((err = av_parse_color(dtext->shadowcolor_rgba, dtext->shadowcolor_string, -1, ctx))) {
+ if ((err = av_parse_color(dtext->shadowcolor.rgba, dtext->shadowcolor_string, -1, ctx))) {
av_log(ctx, AV_LOG_ERROR,
"Invalid shadow color '%s'\n", dtext->shadowcolor_string);
return err;
@@ -344,12 +482,11 @@ 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(dtext->library, dtext->fontfile, 0, &dtext->face))) {
- av_log(ctx, AV_LOG_ERROR, "Could not load fontface from file '%s': %s\n",
- dtext->fontfile, FT_ERRMSG(err));
- return AVERROR(EINVAL);
- }
+ err = load_font(ctx);
+ if (err)
+ return err;
+ if (!dtext->fontsize)
+ dtext->fontsize = 16;
if ((err = FT_Set_Pixel_Sizes(dtext->face, 0, dtext->fontsize))) {
av_log(ctx, AV_LOG_ERROR, "Could not set font size to %d pixels: %s\n",
dtext->fontsize, FT_ERRMSG(err));
@@ -362,37 +499,33 @@ static av_cold int init(AVFilterContext *ctx)
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
+ if (dtext->exp_mode == EXP_STRFTIME &&
+ (strchr(dtext->text, '%') || strchr(dtext->text, '\\')))
+ av_log(ctx, AV_LOG_WARNING, "expansion=strftime is deprecated.\n");
+
+ av_bprint_init(&dtext->expanded_text, 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);
+ av_freep(&glyph->glyph);
av_free(elem);
return 0;
}
@@ -400,21 +533,23 @@ static int glyph_enu_free(void *opaque, void *elem)
static av_cold void uninit(AVFilterContext *ctx)
{
DrawTextContext *dtext = ctx->priv;
- int i;
- av_freep(&dtext->expanded_text);
+ av_expr_free(dtext->x_pexpr); dtext->x_pexpr = NULL;
+ av_expr_free(dtext->y_pexpr); dtext->y_pexpr = NULL;
+ av_expr_free(dtext->draw_pexpr); dtext->draw_pexpr = NULL;
+
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);
- for (i = 0; i < 4; i++) {
- av_freep(&dtext->box_line[i]);
- dtext->pixel_step[i] = 0;
- }
-
+ av_bprint_finalize(&dtext->expanded_text, NULL);
}
static inline int is_newline(uint32_t c)
@@ -422,295 +557,244 @@ 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 *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;
+ int ret;
- localtime_r(&now, &ltime);
+ ff_draw_init(&dtext->dc, inlink->format, 0);
+ ff_draw_color(&dtext->dc, &dtext->fontcolor, dtext->fontcolor.rgba);
+ ff_draw_color(&dtext->dc, &dtext->shadowcolor, dtext->shadowcolor.rgba);
+ ff_draw_color(&dtext->dc, &dtext->boxcolor, dtext->boxcolor.rgba);
+
+ 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 << dtext->dc.hsub_max;
+ dtext->var_values[VAR_VSUB] = 1 << dtext->dc.vsub_max;
+ 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;
- while ((buf = av_realloc(buf, buf_size))) {
- *buf = 1;
- if (strftime(buf, buf_size, dtext->text, &ltime) != 0 || *buf == 0)
- break;
- buf_size *= 2;
- }
+ av_lfg_init(&dtext->prng, av_get_random_seed());
- if (!buf)
- return AVERROR(ENOMEM);
- text = dtext->expanded_text = buf;
- dtext->expanded_text_size = buf_size;
-#endif
+ 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->draw_pexpr, dtext->draw_expr, var_names,
+ NULL, NULL, fun2_names, fun2, 0, ctx)) < 0)
- 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;
- }
- }
+ return AVERROR(EINVAL);
- /* load and cache glyphs */
- for (i = 0, p = text; *p; i++) {
- GET_UTF8(code, *p++, continue;);
+ return 0;
+}
- /* 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;
- }
+static int command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
+{
+ DrawTextContext *dtext = ctx->priv;
- y_min = FFMIN(glyph->bbox.yMin, y_min);
- y_max = FFMAX(glyph->bbox.yMax, y_max);
+ if (!strcmp(cmd, "reinit")) {
+ int ret;
+ uninit(ctx);
+ dtext->reinit = 1;
+ 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;);
- /* skip the \n in the sequence \r\n */
- if (prev_code == '\r' && code == '\n')
- continue;
+ return AVERROR(ENOSYS);
+}
- prev_code = code;
- if (is_newline(code)) {
- str_w = FFMAX(str_w, x - dtext->x);
- y += text_height;
- x = 0;
- continue;
- }
+static int func_pict_type(AVFilterContext *ctx, AVBPrint *bp,
+ char *fct, unsigned argc, char **argv, int tag)
+{
+ DrawTextContext *dtext = ctx->priv;
- /* get glyph */
- prev_glyph = glyph;
- dummy.code = code;
- glyph = av_tree_find(dtext->glyphs, &dummy, glyph_cmp, NULL);
+ av_bprintf(bp, "%c", av_get_picture_type_char(dtext->var_values[VAR_PICT_TYPE]));
+ return 0;
+}
- /* 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;
- }
+static int func_pts(AVFilterContext *ctx, AVBPrint *bp,
+ char *fct, unsigned argc, char **argv, int tag)
+{
+ DrawTextContext *dtext = ctx->priv;
- if (x + glyph->bbox.xMax >= width) {
- str_w = FFMAX(str_w, x);
- y += text_height;
- x = 0;
- }
+ av_bprintf(bp, "%.6f", dtext->var_values[VAR_T]);
+ return 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;
- }
+static int func_frame_num(AVFilterContext *ctx, AVBPrint *bp,
+ char *fct, unsigned argc, char **argv, int tag)
+{
+ DrawTextContext *dtext = ctx->priv;
- str_w = FFMIN(width - 1, FFMAX(str_w, x));
- y = FFMIN(y + text_height, height - 1);
+ av_bprintf(bp, "%d", (int)dtext->var_values[VAR_N]);
+ return 0;
+}
- dtext->w = str_w;
- dtext->var_values[VAR_TEXT_W] = dtext->var_values[VAR_TW] = dtext->w;
- dtext->h = y;
- dtext->var_values[VAR_TEXT_H] = dtext->var_values[VAR_TH] = dtext->h;
+#if !HAVE_LOCALTIME_R
+static void localtime_r(const time_t *t, struct tm *tm)
+{
+ *tm = *localtime(t);
+}
+#endif
+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;
+
+ time(&now);
+ if (tag == 'L')
+ localtime_r(&now, &tm);
+ else
+ tm = *gmtime(&now);
+ av_bprint_strftime(bp, fmt, &tm);
return 0;
}
-
-static int config_input(AVFilterLink *inlink)
+static int func_eval_expr(AVFilterContext *ctx, AVBPrint *bp,
+ char *fct, unsigned argc, char **argv, int tag)
{
- AVFilterContext *ctx = inlink->dst;
DrawTextContext *dtext = ctx->priv;
- const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
+ double res;
int ret;
- dtext->hsub = pix_desc->log2_chroma_w;
- dtext->vsub = pix_desc->log2_chroma_h;
-
- dtext->var_values[VAR_E ] = M_E;
- dtext->var_values[VAR_PHI] = M_PHI;
- dtext->var_values[VAR_PI ] = M_PI;
-
- dtext->var_values[VAR_MAIN_W] =
- dtext->var_values[VAR_MW] = ctx->inputs[0]->w;
- dtext->var_values[VAR_MAIN_H] =
- dtext->var_values[VAR_MH] = ctx->inputs[0]->h;
-
- dtext->var_values[VAR_X] = 0;
- dtext->var_values[VAR_Y] = 0;
- dtext->var_values[VAR_N] = 0;
- dtext->var_values[VAR_T] = NAN;
-
- av_lfg_init(&dtext->prng, av_get_random_seed());
-
- if ((ret = av_expr_parse(&dtext->x_pexpr, dtext->x_expr, var_names,
- NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
- (ret = av_expr_parse(&dtext->y_pexpr, dtext->y_expr, var_names,
- NULL, NULL, fun2_names, fun2, 0, ctx)) < 0 ||
- (ret = av_expr_parse(&dtext->d_pexpr, dtext->d_expr, var_names,
- NULL, NULL, fun2_names, fun2, 0, ctx)) < 0)
- return AVERROR(EINVAL);
-
- if ((ret =
- ff_fill_line_with_color(dtext->box_line, dtext->pixel_step,
- inlink->w, dtext->boxcolor,
- inlink->format, dtext->boxcolor_rgba,
- &dtext->is_packed_rgb, dtext->rgba_map)) < 0)
- return ret;
-
- if (!dtext->is_packed_rgb) {
- uint8_t *rgba = dtext->fontcolor_rgba;
- dtext->fontcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
- dtext->fontcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
- dtext->fontcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
- dtext->fontcolor[3] = rgba[3];
- rgba = dtext->shadowcolor_rgba;
- dtext->shadowcolor[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
- dtext->shadowcolor[1] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
- dtext->shadowcolor[2] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
- dtext->shadowcolor[3] = rgba[3];
- }
-
- dtext->draw = 1;
+ ret = av_expr_parse_and_eval(&res, argv[0], var_names, dtext->var_values,
+ NULL, NULL, fun2_names, fun2,
+ &dtext->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);
- return dtext_prepare_text(ctx);
+ return ret;
}
-#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 },
+ { "pict_type", 0, 0, 0, func_pict_type },
+ { "pts", 0, 0, 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 },
+};
-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)
{
- 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]);
+ DrawTextContext *dtext = ctx->priv;
+ char *text = dtext->text;
+ AVBPrint *bp = &dtext->expanded_text;
+ 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 *dtext, AVFrame *frame,
- int width, int height, const uint8_t rgbcolor[4], const uint8_t yuvcolor[4], int x, int y)
+ int width, int height, const uint8_t rgbcolor[4], FFDrawColor *color, int x, int y)
{
- char *text = HAVE_LOCALTIME_R ? dtext->expanded_text : dtext->text;
+ char *text = dtext->expanded_text.str;
uint32_t code = 0;
- int i;
+ int i, x1, y1;
uint8_t *p;
Glyph *glyph = NULL;
@@ -729,15 +813,15 @@ static int draw_glyphs(DrawTextContext *dtext, AVFrame *frame,
glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY)
return AVERROR(EINVAL);
- if (dtext->is_packed_rgb) {
- draw_glyph_rgb(frame, &glyph->bitmap,
- dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
- dtext->pixel_step[0], rgbcolor, dtext->rgba_map);
- } else {
- draw_glyph_yuv(frame, &glyph->bitmap,
- dtext->positions[i].x+x, dtext->positions[i].y+y, width, height,
- yuvcolor, dtext->hsub, dtext->vsub);
- }
+ x1 = dtext->positions[i].x+dtext->x+x;
+ y1 = dtext->positions[i].y+dtext->y+y;
+
+ ff_blend_mask(&dtext->dc, color,
+ frame->data, frame->linesize, width, height,
+ glyph->bitmap.buffer, glyph->bitmap.pitch,
+ glyph->bitmap.width, glyph->bitmap.rows,
+ glyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO ? 0 : 3,
+ 0, x1, y1);
}
return 0;
@@ -747,97 +831,184 @@ static int draw_text(AVFilterContext *ctx, AVFrame *frame,
int width, int height)
{
DrawTextContext *dtext = 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 = 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 };
+
+ time_t now = time(0);
+ struct tm ltime;
+ AVBPrint *bp = &dtext->expanded_text;
+
+ av_bprint_clear(bp);
+
+ if(dtext->basetime != AV_NOPTS_VALUE)
+ now= frame->pts*av_q2d(ctx->inputs[0]->time_base) + dtext->basetime/1000000;
+
+ switch (dtext->exp_mode) {
+ case EXP_NONE:
+ av_bprintf(bp, "%s", dtext->text);
+ break;
+ case EXP_NORMAL:
+ if ((ret = expand_text(ctx)) < 0)
+ return ret;
+ break;
+ case EXP_STRFTIME:
+ localtime_r(&now, &ltime);
+ av_bprint_strftime(bp, dtext->text, &ltime);
+ break;
+ }
+
+ if (dtext->tc_opt_string) {
+ char tcbuf[AV_TIMECODE_STR_SIZE];
+ av_timecode_make_string(&dtext->tc, tcbuf, inlink->frame_count);
+ av_bprint_clear(bp);
+ av_bprintf(bp, "%s%s", dtext->text, tcbuf);
+ }
+
+ if (!av_bprint_is_complete(bp))
+ return AVERROR(ENOMEM);
+ text = dtext->expanded_text.str;
+ if ((len = dtext->expanded_text.len) > dtext->nb_positions) {
+ if (!(dtext->positions =
+ av_realloc(dtext->positions, len*sizeof(*dtext->positions))))
+ return AVERROR(ENOMEM);
+ dtext->nb_positions = len;
+ }
+
+ 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(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;
+ }
+
+ /* 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;
+ }
+
+ 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->var_values[VAR_LINE_H] = dtext->var_values[VAR_LH] = dtext->max_glyph_h;
+
+ 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->draw_pexpr, dtext->var_values, &dtext->prng);
+
+ if(!dtext->draw)
+ return 0;
+
+ 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(frame, 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);
+ ff_blend_rectangle(&dtext->dc, &dtext->boxcolor,
+ frame->data, frame->linesize, width, height,
+ dtext->x, dtext->y, box_w, box_h);
if (dtext->shadowx || dtext->shadowy) {
- if ((ret = draw_glyphs(dtext, frame, width, height,
- dtext->shadowcolor_rgba,
- dtext->shadowcolor,
- dtext->x + dtext->shadowx,
- dtext->y + dtext->shadowy)) < 0)
+ if ((ret = draw_glyphs(dtext, frame, width, height, dtext->shadowcolor.rgba,
+ &dtext->shadowcolor, dtext->shadowx, dtext->shadowy)) < 0)
return ret;
}
- if ((ret = draw_glyphs(dtext, frame, width, height,
- dtext->fontcolor_rgba,
- dtext->fontcolor,
- dtext->x,
- dtext->y)) < 0)
+ if ((ret = draw_glyphs(dtext, frame, width, height, dtext->fontcolor.rgba,
+ &dtext->fontcolor, 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 *dtext = 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 (dtext->reload)
+ if ((ret = load_textfile(ctx)) < 0)
+ return ret;
+ dtext->var_values[VAR_N] = inlink->frame_count;
dtext->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ?
NAN : frame->pts * av_q2d(inlink->time_base);
- dtext->var_values[VAR_X] =
- av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng);
- dtext->var_values[VAR_Y] =
- av_expr_eval(dtext->y_pexpr, dtext->var_values, &dtext->prng);
- dtext->var_values[VAR_X] =
- av_expr_eval(dtext->x_pexpr, dtext->var_values, &dtext->prng);
-
- dtext->draw = av_expr_eval(dtext->d_pexpr, dtext->var_values, &dtext->prng);
-
- normalize_double(&dtext->x, dtext->var_values[VAR_X]);
- normalize_double(&dtext->y, dtext->var_values[VAR_Y]);
-
- if (dtext->fix_bounds) {
- if (dtext->x < 0) dtext->x = 0;
- if (dtext->y < 0) dtext->y = 0;
- if ((unsigned)dtext->x + (unsigned)dtext->w > inlink->w)
- dtext->x = inlink->w - dtext->w;
- if ((unsigned)dtext->y + (unsigned)dtext->h > inlink->h)
- dtext->y = inlink->h - dtext->h;
- }
-
- dtext->x &= ~((1 << dtext->hsub) - 1);
- dtext->y &= ~((1 << dtext->vsub) - 1);
- av_dlog(ctx, "n:%d t:%f x:%d y:%d x+w:%d y+h:%d\n",
- (int)dtext->var_values[VAR_N], dtext->var_values[VAR_T],
- dtext->x, dtext->y, dtext->x+dtext->w, dtext->y+dtext->h);
+ dtext->var_values[VAR_PICT_TYPE] = frame->pict_type;
- if (dtext->draw)
- draw_text(inlink->dst, frame, frame->width, frame->height);
+ draw_text(ctx, frame, frame->width, frame->height);
- dtext->var_values[VAR_N] += 1.0;
+ 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);
- return ff_filter_frame(inlink->dst->outputs[0], frame);
+ return ff_filter_frame(outlink, frame);
}
static const AVFilterPad avfilter_vf_drawtext_inputs[] = {
@@ -871,4 +1042,5 @@ AVFilter avfilter_vf_drawtext = {
.inputs = avfilter_vf_drawtext_inputs,
.outputs = avfilter_vf_drawtext_outputs,
+ .process_command = command,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 15:40:22 +0000