@@ -169,6 +169,7 @@ External library support:

                            and libraw1394 [no]

   --enable-libdirac        enable Dirac support via libdirac [no]

   --enable-libfaac         enable FAAC support via libfaac [no]

+  --enable-libfreetype     enable libfreetype [no]

   --enable-libgsm          enable GSM support via libgsm [no]

   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]

   --enable-libnut          enable NUT (de)muxing via libnut,

@@ -897,6 +898,7 @@ CONFIG_LIST="

     libdc1394

     libdirac

     libfaac

+    libfreetype

     libgsm

     libmp3lame

     libnut

@@ -1043,6 +1045,7 @@ HAVE_LIST="

     llrintf

     local_aligned_16

     local_aligned_8

+    localtime_r

     log2

     log2f

     loongson

@@ -1425,6 +1428,7 @@ udp_protocol_deps="network"

 # filters

 blackframe_filter_deps="gpl"

 cropdetect_filter_deps="gpl"

+drawtext_filter_deps="libfreetype"

 frei0r_filter_deps="frei0r dlopen strtok_r"

 frei0r_src_filter_deps="frei0r dlopen strtok_r"

 hqdn3d_filter_deps="gpl"

@@ -2740,6 +2744,7 @@ check_func  getrusage

 check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss

 check_func  inet_aton $network_extralibs

 check_func  isatty

+check_func  localtime_r

 check_func  ${malloc_prefix}memalign            && enable memalign

 check_func  mkstemp

 check_func  mmap

@@ -2826,6 +2831,7 @@ enabled libdirac   && add_cflags $(pkg-config --cflags dirac) &&

                       require  libdirac libdirac_decoder/dirac_parser.h dirac_decoder_init $(pkg-config --libs dirac) &&

                       require  libdirac libdirac_encoder/dirac_encoder.h dirac_encoder_init $(pkg-config --libs dirac)

 enabled libfaac    && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac

+enabled libfreetype && add_cflags $(pkg-config --cflags freetype2) && require libfreetype ft2build.h FT_Init_FreeType -lfreetype

 enabled libgsm     && require  libgsm gsm/gsm.h gsm_create -lgsm

 enabled libmp3lame && require  "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame

 enabled libnut     && require  libnut libnut.h nut_demuxer_init -lnut

@@ -386,6 +386,118 @@ fade=in:0:25, fade=out:975:25

 fade=in:5:20

 @end example

+@section drawtext

+

+Draw text string or text from specified file on top of video using the

+libfreetype library.

+

+To enable compilation of this filter you need to configure FFmpeg with

+@code{--enable-libfreetype}.

+

+The filter also recognizes strftime() sequences in the provided text

+and expands them accordingly. Check the documentation of strftime().

+

+The filter accepts parameters as a list of @var{key}=@var{value} pairs,

+separated by ":".

+

+The description of the accepted parameters follows.

+

+@table @option

+

+@item fontfile

+The font file to be used for drawing text. Path must be included.

+This parameter is mandatory.

+

+@item text

+The text string to be drawn. The text must be a sequence of UTF-8

+encoded characters.

+This parameter is mandatory if no file is specified.

+

+@item textfile

+A text file containing text to be drawn. The text must be a sequence

+of UTF-8 encoded characters

+

+This parameter is mandatory if no text string is specified.

+

+If both text and textfile are specified, an error is thrown.

+

+@item x, y

+The offsets where text will be drawn within the video frame.

+Relative to the top/left border of the output image.

+

+The default value of @var{x} and @var{y} is 0.

+

+@item fontsize

+The font size to be used for drawing text.

+The default value of @var{size} is 16.

+

+@item fontcolor

+The color to be used for drawing fonts.

+Either a string (e.g. "red") or in 0xRRGGBB[AA] format

+(e.g. "0xff000033"), possibly followed by an alpha specifier.

+The default value of @var{fontcolor} is "black".

+

+@item boxcolor

+The color to be used for drawing box around text.

+Either a string (e.g. "yellow") or in 0xRRGGBB[AA] format

+(e.g. "0xff00ff"), possibly followed by an alpha specifier.

+

+The default value of @var{bgcolor} is "white".

+

+@item box

+Used to draw a box around text using background color.

+Value should be either 1 (enable) or 0 (disable).

+The default value of @var{box} is 0.

+

+@item ft_load_flags

+Flags to be used for loading the fonts.

+

+The flags map the corresponding flags supported by libfreetype, and are

+a combination of the following values:

+@table @var

+@item default

+@item no_scale

+@item no_hinting

+@item render

+@item no_bitmap

+@item vertical_layout

+@item force_autohint

+@item crop_bitmap

+@item pedantic

+@item ignore_global_advance_width

+@item no_recurse

+@item ignore_transform

+@item monochrome

+@item linear_design

+@item no_autohint

+@item end table

+@end table

+

+Default value is "render".

+

+For more information consult the documentation for the FT_LOAD_*

+libfreetype flags.

+

+@item tabsize

+The size in number of spaces to use for rendering the tab.

+Default value is 4.

+@end table

+

+For example the command:

+@example

+drawtext=fontfile=FreeSerif.ttf: text='Test Text': x=100: y=50: fontsize=24: fontcolor=yellow@@0.2: boxcolor=red@@0.2: box=1"

+@end example

+

+will draw 'Test Text' with font FreeSerif of size 24 at position

+(100,50), text color is yellow, and draw a red box around text. Both

+the text and the box have an opacity of 20%.

+

+Note that the double quotes are not necessary if spaces are not used

+within the parameter list.

+

+For more information about libfreetype, check:

+@url{http://www.freetype.org/}

+

 @section fifo

 Buffer input images and send them when they are requested.

@@ -27,6 +27,7 @@ OBJS-$(CONFIG_COPY_FILTER)                   += vf_copy.o

 OBJS-$(CONFIG_CROP_FILTER)                   += vf_crop.o

 OBJS-$(CONFIG_CROPDETECT_FILTER)             += vf_cropdetect.o

 OBJS-$(CONFIG_DRAWBOX_FILTER)                += vf_drawbox.o

+OBJS-$(CONFIG_DRAWTEXT_FILTER)               += vf_drawtext.o

 OBJS-$(CONFIG_FADE_FILTER)                   += vf_fade.o

 OBJS-$(CONFIG_FIFO_FILTER)                   += vf_fifo.o

 OBJS-$(CONFIG_FORMAT_FILTER)                 += vf_format.o

@@ -45,6 +45,7 @@ void avfilter_register_all(void)

     REGISTER_FILTER (CROP,        crop,        vf);

     REGISTER_FILTER (CROPDETECT,  cropdetect,  vf);

     REGISTER_FILTER (DRAWBOX,     drawbox,     vf);

+    REGISTER_FILTER (DRAWTEXT,    drawtext,    vf);

     REGISTER_FILTER (FADE,        fade,        vf);

     REGISTER_FILTER (FIFO,        fifo,        vf);

     REGISTER_FILTER (FORMAT,      format,      vf);

new file mode 100644

@@ -0,0 +1,650 @@

+/*

+ * Copyright (c) 2011 Stefano Sabatini

+ * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram

+ * Copyright (c) 2003 Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>

+ *

+ * This file is part of FFmpeg.

+ *

+ * 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.

+ *

+ * 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 FFmpeg; if not, write to the Free Software

+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

+ */

+

+/**

+ * @file

+ * drawtext filter, based on the original FFmpeg vhook/drawtext.c

+ * filter by Gustavo Sverzut Barbieri

+ */

+

+#include <sys/time.h>

+#include <time.h>

+

+#include "libavutil/colorspace.h"

+#include "libavutil/file.h"

+#include "libavutil/opt.h"

+#include "libavutil/parseutils.h"

+#include "libavutil/pixdesc.h"

+#include "libavutil/tree.h"

+#include "avfilter.h"

+#include "drawutils.h"

+

+#undef time

+

+#include <ft2build.h>

+#include <freetype/config/ftheader.h>

+#include FT_FREETYPE_H

+#include FT_GLYPH_H

+

+#define MAX_EXPANDED_TEXT_SIZE 2048

+

+typedef struct {

+    const AVClass *class;

+    char *fontfile;                 ///< font to be used

+    char *text;                     ///< text to be drawn

+    int ft_load_flags;              ///< flags used for loading fonts, see FT_LOAD_*

+    /** buffer containing the text expanded by strftime */

+    char expanded_text[MAX_EXPANDED_TEXT_SIZE];

+    /** positions for each element in the text */

+    FT_Vector positions[MAX_EXPANDED_TEXT_SIZE];

+    char *textfile;                 ///< file with text to be drawn

+    unsigned int x;                 ///< x position to start drawing text

+    unsigned int y;                 ///< y position to start drawing text

+    unsigned int fontsize;          ///< font size to use

+    char *fontcolor_string;         ///< font color as string

+    char *boxcolor_string;          ///< box color as string

+    uint8_t fontcolor[4];           ///< foreground color

+    uint8_t boxcolor[4];            ///< background color

+    uint8_t fontcolor_rgba[4];      ///< foreground color in RGBA

+    uint8_t boxcolor_rgba[4];       ///< background 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

+

+    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

+} DrawTextContext;

+

+#define OFFSET(x) offsetof(DrawTextContext, x)

+

+static const AVOption drawtext_options[]= {

+{"fontfile", "set font file",        OFFSET(fontfile),         FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },

+{"text",     "set text",             OFFSET(text),             FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },

+{"textfile", "set text file",        OFFSET(textfile),         FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },

+{"fontcolor","set foreground color", OFFSET(fontcolor_string), FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },

+{"boxcolor", "set box color",        OFFSET(boxcolor_string),  FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },

+{"box",      "set box",              OFFSET(draw_box),         FF_OPT_TYPE_INT,    0,         0,        1 },

+{"fontsize", "set font size",        OFFSET(fontsize),         FF_OPT_TYPE_INT,   16,         1,       72 },

+{"x",        "set x",                OFFSET(x),                FF_OPT_TYPE_INT,    0,         0,  INT_MAX },

+{"y",        "set y",                OFFSET(y),                FF_OPT_TYPE_INT,    0,         0,  INT_MAX },

+{"tabsize",  "set tab size",         OFFSET(tabsize),          FF_OPT_TYPE_INT,    4,         0,  INT_MAX },

+

+/* FT_LOAD_* flags */

+{"ft_load_flags", "set font loading flags for libfreetype",   OFFSET(ft_load_flags),  FF_OPT_TYPE_FLAGS,  FT_LOAD_DEFAULT|FT_LOAD_RENDER, 0, INT_MAX, 0, "ft_load_flags" },

+{"default",                     "set default",                     0, FF_OPT_TYPE_CONST, FT_LOAD_DEFAULT,                     INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"no_scale",                    "set no_scale",                    0, FF_OPT_TYPE_CONST, FT_LOAD_NO_SCALE,                    INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"no_hinting",                  "set no_hinting",                  0, FF_OPT_TYPE_CONST, FT_LOAD_NO_HINTING,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"render",                      "set render",                      0, FF_OPT_TYPE_CONST, FT_LOAD_RENDER,                      INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"no_bitmap",                   "set no_bitmap",                   0, FF_OPT_TYPE_CONST, FT_LOAD_NO_BITMAP,                   INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"vertical_layout",             "set vertical_layout",             0, FF_OPT_TYPE_CONST, FT_LOAD_VERTICAL_LAYOUT,             INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"force_autohint",              "set force_autohint",              0, FF_OPT_TYPE_CONST, FT_LOAD_FORCE_AUTOHINT,              INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"crop_bitmap",                 "set crop_bitmap",                 0, FF_OPT_TYPE_CONST, FT_LOAD_CROP_BITMAP,                 INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"pedantic",                    "set pedantic",                    0, FF_OPT_TYPE_CONST, FT_LOAD_PEDANTIC,                    INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"ignore_global_advance_width", "set ignore_global_advance_width", 0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH, INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"no_recurse",                  "set no_recurse",                  0, FF_OPT_TYPE_CONST, FT_LOAD_NO_RECURSE,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"ignore_transform",            "set ignore_transform",            0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_TRANSFORM,            INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"monochrome",                  "set monochrome",                  0, FF_OPT_TYPE_CONST, FT_LOAD_MONOCHROME,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"linear_design",               "set linear_design",               0, FF_OPT_TYPE_CONST, FT_LOAD_LINEAR_DESIGN,               INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{"no_autohint",                 "set no_autohint",                 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_AUTOHINT,                 INT_MIN, INT_MAX, 0, "ft_load_flags" },

+{NULL},

+};

+

+static const char *drawtext_get_name(void *ctx)

+{

+    return "drawtext";

+}

+

+static const AVClass drawtext_class = {

+    "DrawTextContext",

+    drawtext_get_name,

+    drawtext_options

+};

+

+#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

+{

+    int err;

+    const char *err_msg;

+} static ft_errors[] =

+#include FT_ERRORS_H

+

+#define FT_ERRMSG(e) ft_errors[e].err_msg

+

+typedef struct {

+    FT_Glyph *glyph;

+    uint32_t code;

+    FT_Bitmap bitmap; ///< array holding bitmaps of font

+    FT_BBox bbox;

+    int advance;

+    int bitmap_left;

+    int bitmap_top;

+} Glyph;

+

+static int glyph_cmp(const Glyph *a, const Glyph *b)

+{

+    int64_t diff = (int64_t)a->code - (int64_t)b->code;

+    return diff > 0 ? 1 : diff < 0 ? -1 : 0;

+}

+

+/**

+ * Load glyphs corresponding to the UTF-32 codepoint code.

+ */

+static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code)

+{

+    DrawTextContext *dtext = ctx->priv;

+    Glyph *glyph = av_mallocz(sizeof(Glyph));

+    struct AVTreeNode *node = NULL;

+    int ret;

+

+    /* load glyph into dtext->face->glyph */

+    ret = FT_Load_Char(dtext->face, code, dtext->ft_load_flags);

+    if (ret)

+        return AVERROR(EINVAL);

+

+    /* save glyph */

+    glyph->code  = code;

+    glyph->glyph = av_mallocz(sizeof(FT_Glyph));

+    ret = FT_Get_Glyph(dtext->face->glyph, glyph->glyph);

+    if (ret)

+        return AVERROR(EINVAL);

+

+    glyph->bitmap      = dtext->face->glyph->bitmap;

+    glyph->bitmap_left = dtext->face->glyph->bitmap_left;

+    glyph->bitmap_top  = dtext->face->glyph->bitmap_top;

+    glyph->advance     = dtext->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);

+

+    /* cache the newly created glyph */

+    if (!node)

+        node = av_mallocz(av_tree_node_size);

+    av_tree_insert(&dtext->glyphs, glyph, (void *)glyph_cmp, &node);

+

+    if (glyph_ptr)

+        *glyph_ptr = glyph;

+    return 0;

+}

+

+static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)

+{

+    int err;

+    DrawTextContext *dtext = ctx->priv;

+

+    dtext->class = &drawtext_class;

+    av_opt_set_defaults2(dtext, 0, 0);

+    dtext->fontcolor_string = av_strdup("black");

+    dtext->boxcolor_string = av_strdup("white");

+

+    if ((err = (av_set_options_string(dtext, args, "=", ":"))) < 0) {

+        av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);

+        return err;

+    }

+

+    if (!dtext->fontfile) {

+        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);

+            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->text) {

+        av_log(ctx, AV_LOG_ERROR,

+               "Either text or a valid file must be provided\n");

+        return AVERROR(EINVAL);

+    }

+

+    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))) {

+        av_log(ctx, AV_LOG_ERROR,

+               "Invalid box color '%s'\n", dtext->boxcolor_string);

+        return err;

+    }

+

+    if ((err = FT_Init_FreeType(&(dtext->library)))) {

+        av_log(ctx, AV_LOG_ERROR,

+               "Could not load FreeType: %s\n", FT_ERRMSG(err));

+        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);

+    }

+    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));

+        return AVERROR(EINVAL);

+    }

+

+    dtext->use_kerning = FT_HAS_KERNING(dtext->face);

+

+    /* load the fallback glyph with code 0 */

+    load_glyph(ctx, NULL, 0);

+

+#if !HAVE_LOCALTIME_R

+    av_log(ctx, AV_LOG_WARNING, "strftime() expansion unavailable!\n");

+#else

+    if (strlen(dtext->text) >= MAX_EXPANDED_TEXT_SIZE) {

+        av_log(ctx, AV_LOG_ERROR,

+               "Impossible to print text, string is too big\n");

+        return AVERROR(EINVAL);

+    }

+#endif

+

+    return 0;

+}

+

+static int query_formats(AVFilterContext *ctx)

+{

+    static const enum PixelFormat pix_fmts[] = {

+        PIX_FMT_ARGB,    PIX_FMT_RGBA,

+        PIX_FMT_ABGR,    PIX_FMT_BGRA,

+        PIX_FMT_RGB24,   PIX_FMT_BGR24,

+        PIX_FMT_YUV420P, PIX_FMT_YUV444P,

+        PIX_FMT_YUV422P, PIX_FMT_YUV411P,

+        PIX_FMT_YUV410P, PIX_FMT_YUV440P,

+        PIX_FMT_NONE

+    };

+

+    avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));

+    return 0;

+}

+

+static int glyph_enu_free(void *opaque, void *elem)

+{

+    av_free(elem);

+    return 0;

+}

+

+static av_cold void uninit(AVFilterContext *ctx)

+{

+    DrawTextContext *dtext = ctx->priv;

+    int i;

+

+    av_freep(&dtext->fontfile);

+    av_freep(&dtext->text);

+    av_freep(&dtext->fontcolor_string);

+    av_freep(&dtext->boxcolor_string);

+    av_tree_enumerate(dtext->glyphs, NULL, NULL, glyph_enu_free);

+    av_tree_destroy(dtext->glyphs);

+    dtext->glyphs = 0;

+    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;

+    }

+

+}

+

+static int config_input(AVFilterLink *inlink)

+{

+    DrawTextContext *dtext = inlink->dst->priv;

+    const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[inlink->format];

+    int ret;

+

+    dtext->hsub = pix_desc->log2_chroma_w;

+    dtext->vsub = pix_desc->log2_chroma_h;

+

+    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];

+    }

+

+    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(picref, yuva_color, val, x, y, hsub, vsub) {           \

+    luma_pos    = ((x)          ) + ((y)          ) * picref->linesize[0]; \

+    chroma_pos1 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[1]; \

+    chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \

+    alpha = (yuva_color[3] * (val)) / 255;                               \

+    picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255 - alpha) * picref->data[0][luma_pos]) >> 8; \

+    alpha = (yuva_color[3] * (val)) / 224;                               \

+    picref->data[1][chroma_pos1] = 16 + (alpha * (yuva_color[1]-16) + (224 - alpha) * (picref->data[1][chroma_pos1]-16)) / 224; \

+    picref->data[2][chroma_pos2] = 16 + (alpha * (yuva_color[2]-16) + (224 - alpha) * (picref->data[2][chroma_pos2]-16)) / 224; \

+}

+

+static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x,

+                                 unsigned int y, unsigned int width, unsigned int height,

+                                 unsigned char yuva_color[4], int hsub, int vsub)

+{

+    int r, c, alpha;

+    unsigned int luma_pos, chroma_pos1, chroma_pos2;

+    uint8_t src_val, dst_pixel[4];

+

+    for (r = 0; r < bitmap->rows && r+y < height; r++) {

+        for (c = 0; c < bitmap->width && c+x < width; c++) {

+            /* get pixel in the picref (destination) */

+            dst_pixel[0] = picref->data[0][  c+x           +  (y+r)          * picref->linesize[0]];

+            dst_pixel[1] = picref->data[1][((c+x) >> hsub) + ((y+r) >> vsub) * picref->linesize[1]];

+            dst_pixel[2] = picref->data[2][((c+x) >> hsub) + ((y+r) >> vsub) * picref->linesize[2]];

+

+            /* get intensity value in the glyph bitmap (source) */

+            src_val = GET_BITMAP_VAL(r, c);

+            if (!src_val)

+                continue;

+

+            SET_PIXEL_YUV(picref, yuva_color, src_val, c+x, y+r, hsub, vsub);

+        }

+    }

+

+    return 0;

+}

+

+#define SET_PIXEL_RGB(picref, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off, a_off) { \

+    p   = picref->data[0] + (x) * pixel_step + ((y) * picref->linesize[0]); \

+    alpha = (rgba_color[3] * (val)) / 255;                              \

+    *(p+r_off) = (alpha * rgba_color[0] + (255 - alpha) * *(p+r_off)) >> 8; \

+    *(p+g_off) = (alpha * rgba_color[1] + (255 - alpha) * *(p+g_off)) >> 8; \

+    *(p+b_off) = (alpha * rgba_color[2] + (255 - alpha) * *(p+b_off)) >> 8; \

+}

+

+static inline int draw_glyph_rgb(AVFilterBufferRef *picref, FT_Bitmap *bitmap,

+                                 unsigned int x, unsigned int y,

+                                 unsigned int width, unsigned int height, int pixel_step,

+                                 unsigned char rgba_color[4], uint8_t rgba_map[4])

+{

+    int r, c, alpha;

+    uint8_t *p;

+    uint8_t src_val, dst_pixel[4];

+

+    for (r = 0; r < bitmap->rows && r+y < height; r++) {

+        for (c = 0; c < bitmap->width && c+x < width; c++) {

+            /* get pixel in the picref (destination) */

+            dst_pixel[0] = picref->data[0][(c+x + rgba_map[0]) * pixel_step +

+                                           (y+r) * picref->linesize[0]];

+            dst_pixel[1] = picref->data[0][(c+x + rgba_map[1]) * pixel_step +

+                                           (y+r) * picref->linesize[0]];

+            dst_pixel[2] = picref->data[0][(c+x + rgba_map[2]) * pixel_step +

+                                           (y+r) * picref->linesize[0]];

+

+            /* get intensity value in the glyph bitmap (source) */

+            src_val = GET_BITMAP_VAL(r, c);

+            if (!src_val)

+                continue;

+

+            SET_PIXEL_RGB(picref, rgba_color, src_val, c+x, y+r, pixel_step,

+                          rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]);

+        }

+    }

+

+    return 0;

+}

+

+static inline void drawbox(AVFilterBufferRef *picref, 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])

+{

+    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(picref, color, 255, i+x, y+j, pixel_step[0],

+                                  rgba_map[0], rgba_map[1], rgba_map[2], rgba_map[3]);

+        } else {

+            unsigned int luma_pos, chroma_pos1, chroma_pos2;

+            for (j = 0; j < height; j++)

+                for (i = 0; i < width; i++)

+                    SET_PIXEL_YUV(picref, color, 255, i+x, y+j, hsub, vsub);

+        }

+    } else {

+        ff_draw_rectangle(picref->data, picref->linesize,

+                          line, pixel_step, hsub, vsub,

+                          x, y, width, height);

+    }

+}

+

+static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,

+                     int width, int height)

+{

+    DrawTextContext *dtext = ctx->priv;

+    char *text = dtext->text;

+    uint32_t code = 0, prev_code = 0;

+    int x = 0, y = 0, i = 0;

+    int text_height, baseline;

+    uint8_t *p;

+    int str_w, str_w_max;

+    int y_min = 32000, y_max = -32000;

+    FT_Vector delta;

+    Glyph *glyph = NULL, *prev_glyph = NULL;

+    Glyph dummy = { 0 };

+

+#if HAVE_LOCALTIME_R

+    time_t now = time(0);

+    struct tm ltime;

+    size_t expanded_text_len;

+

+    dtext->expanded_text[0] = '\1';

+    expanded_text_len = strftime(dtext->expanded_text, MAX_EXPANDED_TEXT_SIZE,

+                                 text, localtime_r(&now, &ltime));

+    text = dtext->expanded_text;

+    if (expanded_text_len == 0 && dtext->expanded_text[0] != '\0') {

+        av_log(ctx, AV_LOG_ERROR,

+               "Impossible to print text, string is too big\n");

+        return AVERROR(EINVAL);

+    }

+#endif

+

+    str_w = str_w_max = 0;

+    x = dtext->x;

+    y = dtext->y;

+

+    /* 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, (void *)glyph_cmp, NULL);

+        if (!glyph)

+            load_glyph(ctx, &glyph, code);

+

+        y_min = FFMIN(glyph->bbox.yMin, y_min);

+        y_max = FFMAX(glyph->bbox.yMax, y_max);

+    }

+    text_height = y_max - y_min;

+    baseline    = y_max;

+

+    /* compute and save position for each glyph */

+    glyph = NULL;

+    for (i = 0, p = text; *p; i++) {

+        GET_UTF8(code, *p++, continue;);

+

+        /* skip the \n in the sequence \r\n */

+        if (prev_code == '\r' && code == '\n')

+            continue;

+

+        /* get glyph */

+        prev_glyph = glyph;

+        dummy.code = code;

+        glyph = av_tree_find(dtext->glyphs, &dummy, (void *)glyph_cmp, NULL);

+

+        /* kerning */

+        if (dtext->use_kerning && prev_glyph && glyph->code) {

+            FT_Get_Kerning(dtext->face, prev_glyph->code, glyph->code,

+                           ft_kerning_default, &delta);

+            x += delta.x >> 6;

+        }

+

+        if (x + glyph->advance >= width || code == '\r' || code == '\n') {

+            if (x + glyph->advance >= width)

+                str_w_max = width - dtext->x - 1;

+            y += text_height;

+            x = dtext->x;

+        }

+

+        /* save position */

+        dtext->positions[i].x = x + glyph->bitmap_left;

+        dtext->positions[i].y = y - glyph->bitmap_top + baseline;

+        if (code != '\n' && code != '\r') {

+            int advance = glyph->advance;

+            if (code == '\t')

+                advance *= dtext->tabsize;

+            x     += advance;

+            str_w += advance;

+        }

+        prev_code = code;

+    }

+

+    y += text_height;

+    if (str_w_max == 0)

+        str_w_max = str_w;

+

+    /* draw box */

+    if (dtext->draw_box) {

+        /* check if it doesn't pass the limits */

+        str_w_max = FFMIN(str_w_max, width - dtext->x - 1);

+        y = FFMIN(y, height - 1);

+

+        /* draw background */

+        drawbox(picref, dtext->x, dtext->y, str_w_max, y-dtext->y,

+                dtext->box_line, dtext->pixel_step, dtext->boxcolor,

+                dtext->hsub, dtext->vsub, dtext->is_packed_rgb, dtext->rgba_map);

+    }

+

+    /* draw glyphs */

+    for (i = 0, p = text; *p; i++) {

+        Glyph dummy = { 0 };

+        GET_UTF8(code, *p++, continue;);

+

+        /* skip new line chars, just go to new line */

+        if (code == '\n' || code == '\r' || code == '\t')

+            continue;

+

+        dummy.code = code;

+        glyph = av_tree_find(dtext->glyphs, &dummy, (void *)glyph_cmp, NULL);

+

+        if (glyph->bitmap.pixel_mode != FT_PIXEL_MODE_MONO &&

+            glyph->bitmap.pixel_mode != FT_PIXEL_MODE_GRAY)

+            return AVERROR(EINVAL);

+

+        if (dtext->is_packed_rgb) {

+            draw_glyph_rgb(picref, &glyph->bitmap,

+                           dtext->positions[i].x, dtext->positions[i].y, width, height,

+                           dtext->pixel_step[0], dtext->fontcolor_rgba, dtext->rgba_map);

+        } else {

+            draw_glyph_yuv(picref, &glyph->bitmap,

+                           dtext->positions[i].x, dtext->positions[i].y, width, height,

+                           dtext->fontcolor, dtext->hsub, dtext->vsub);

+        }

+    }

+

+    return 0;

+}

+

+static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }

+

+static void end_frame(AVFilterLink *inlink)

+{

+    AVFilterLink *outlink = inlink->dst->outputs[0];

+    AVFilterBufferRef *picref = inlink->cur_buf;

+

+    draw_text(inlink->dst, picref, picref->video->w, picref->video->h);

+

+    avfilter_draw_slice(outlink, 0, picref->video->h, 1);

+    avfilter_end_frame(outlink);

+}

+

+AVFilter avfilter_vf_drawtext = {

+    .name          = "drawtext",

+    .description   = NULL_IF_CONFIG_SMALL("Draw text on top of video frames using libfreetype library."),

+    .priv_size     = sizeof(DrawTextContext),

+    .init          = init,

+    .uninit        = uninit,

+    .query_formats = query_formats,

+

+    .inputs    = (AVFilterPad[]) {{ .name             = "default",

+                                    .type             = AVMEDIA_TYPE_VIDEO,

+                                    .get_video_buffer = avfilter_null_get_video_buffer,

+                                    .start_frame      = avfilter_null_start_frame,

+                                    .draw_slice       = null_draw_slice,

+                                    .end_frame        = end_frame,

+                                    .config_props     = config_input,

+                                    .min_perms        = AV_PERM_WRITE |

+                                                        AV_PERM_READ,

+                                    .rej_perms        = AV_PERM_PRESERVE },

+                                  { .name = NULL}},

+    .outputs   = (AVFilterPad[]) {{ .name             = "default",

+                                    .type             = AVMEDIA_TYPE_VIDEO, },

+                                  { .name = NULL}},

+};