On Tue, Mar 22, 2011 at 10:30 PM, Anton Khirnov <[email protected]> wrote:
> From: Stefano Sabatini <[email protected]>
>
> Signed-off-by: Michael Niedermayer <[email protected]>
Looks like the commit message got mangled?
> ---
> configure | 6 +
> doc/filters.texi | 112 ++++++++
> libavfilter/Makefile | 1 +
> libavfilter/allfilters.c | 1 +
> libavfilter/vf_drawtext.c | 650
> +++++++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 770 insertions(+), 0 deletions(-)
> create mode 100644 libavfilter/vf_drawtext.c
>
> diff --git a/configure b/configure
> index 00aa9ed..d6d1953 100755
> --- a/configure
> +++ b/configure
> @@ -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,
> @@ -927,6 +928,7 @@ CONFIG_LIST="
> libdc1394
> libdirac
> libfaac
> + libfreetype
> libgsm
> libmp3lame
> libnut
> @@ -1074,6 +1076,7 @@ HAVE_LIST="
> llrintf
> local_aligned_16
> local_aligned_8
> + localtime_r
> log2
> log2f
> loongson
> @@ -1454,6 +1457,7 @@ 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"
> @@ -2768,6 +2772,7 @@ 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
> @@ -2853,6 +2858,7 @@ enabled libdirac && require_pkg_config dirac
> \
> "libdirac_decoder/dirac_parser.h libdirac_encoder/dirac_encoder.h" \
> "dirac_decoder_init dirac_encoder_init"
> 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
Ping mru on the use of package config
> diff --git a/doc/filters.texi b/doc/filters.texi
> index 872afc6..3f626d2 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -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.
> diff --git a/libavfilter/Makefile b/libavfilter/Makefile
> index f7bc98d..f116fe5 100644
> --- a/libavfilter/Makefile
> +++ b/libavfilter/Makefile
> @@ -26,6 +26,7 @@ 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
> diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
> index 34e87f5..06934c8 100644
> --- a/libavfilter/allfilters.c
> +++ b/libavfilter/allfilters.c
> @@ -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);
> diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
> new file mode 100644
> index 0000000..9fe6def
> --- /dev/null
> +++ b/libavfilter/vf_drawtext.c
> @@ -0,0 +1,650 @@
> +/*
> + * Copyright (c) 2011 Stefano Sabatini
> + * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
> + * Copyright (c) 2003 Gustavo Sverzut Barbieri <[email protected]>
> + *
> + * 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, <ime));
> + 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}},
> +};
> --
> 1.7.4.1
>
No objections otherwise
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