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vlc/modules/misc/freetype.c
Rafaël Carré b5b7e051fd Fix detection of ending of FontBuilder thread
2008-05-07 18:53:30 +02:00

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/*****************************************************************************
* freetype.c : Put text on the video, using freetype2
*****************************************************************************
* Copyright (C) 2002 - 2007 the VideoLAN team
* $Id$
*
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
* Gildas Bazin <gbazin@videolan.org>
* Bernie Purcell <bitmap@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc/vlc.h>
#include <vlc_vout.h>
#include <vlc_osd.h>
#include <vlc_block.h>
#include <vlc_filter.h>
#include <vlc_stream.h>
#include <vlc_xml.h>
#include <vlc_input.h>
#include <math.h>
#include <errno.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#define FT_FLOOR(X) ((X & -64) >> 6)
#define FT_CEIL(X) (((X + 63) & -64) >> 6)
#define FT_MulFix(v, s) (((v)*(s))>>16)
#ifdef __APPLE__
#define DEFAULT_FONT "/System/Library/Fonts/LucidaGrande.dfont"
#define FC_DEFAULT_FONT "Lucida Grande"
#elif defined( SYS_BEOS )
#define DEFAULT_FONT "/boot/beos/etc/fonts/ttfonts/Swiss721.ttf"
#define FC_DEFAULT_FONT "Swiss"
#elif defined( WIN32 )
#define DEFAULT_FONT "" /* Default font found at run-time */
#define FC_DEFAULT_FONT "Arial"
#else
#define DEFAULT_FONT "/usr/share/fonts/truetype/freefont/FreeSerifBold.ttf"
#define FC_DEFAULT_FONT "Serif Bold"
#endif
#if defined(HAVE_FRIBIDI)
#include <fribidi/fribidi.h>
#endif
#ifdef HAVE_FONTCONFIG
#include <fontconfig/fontconfig.h>
#endif
typedef struct line_desc_t line_desc_t;
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy( vlc_object_t * );
static int LoadFontsFromAttachments( filter_t *p_filter );
/* The RenderText call maps to pf_render_string, defined in vlc_filter.h */
static int RenderText( filter_t *, subpicture_region_t *,
subpicture_region_t * );
#ifdef HAVE_FONTCONFIG
static int RenderHtml( filter_t *, subpicture_region_t *,
subpicture_region_t * );
static char *FontConfig_Select( FcConfig *, const char *,
bool, bool, int * );
static int BuildDone( vlc_object_t*, const char *, vlc_value_t, vlc_value_t,
void* );
#endif
static line_desc_t *NewLine( int );
static int GetFontSize( filter_t *p_filter );
static int SetFontSize( filter_t *, int );
static void YUVFromRGB( uint32_t i_argb,
uint8_t *pi_y, uint8_t *pi_u, uint8_t *pi_v );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define FONT_TEXT N_("Font")
#define FONT_LONGTEXT N_("Filename for the font you want to use")
#define FONTSIZE_TEXT N_("Font size in pixels")
#define FONTSIZE_LONGTEXT N_("This is the default size of the fonts " \
"that will be rendered on the video. " \
"If set to something different than 0 this option will override the " \
"relative font size." )
#define OPACITY_TEXT N_("Opacity")
#define OPACITY_LONGTEXT N_("The opacity (inverse of transparency) of the " \
"text that will be rendered on the video. 0 = transparent, " \
"255 = totally opaque. " )
#define COLOR_TEXT N_("Text default color")
#define COLOR_LONGTEXT N_("The color of the text that will be rendered on "\
"the video. This must be an hexadecimal (like HTML colors). The first two "\
"chars are for red, then green, then blue. #000000 = black, #FF0000 = red,"\
" #00FF00 = green, #FFFF00 = yellow (red + green), #FFFFFF = white" )
#define FONTSIZER_TEXT N_("Relative font size")
#define FONTSIZER_LONGTEXT N_("This is the relative default size of the " \
"fonts that will be rendered on the video. If absolute font size is set, "\
"relative size will be overriden." )
static int pi_sizes[] = { 20, 18, 16, 12, 6 };
static const char *ppsz_sizes_text[] = { N_("Smaller"), N_("Small"), N_("Normal"),
N_("Large"), N_("Larger") };
#define YUVP_TEXT N_("Use YUVP renderer")
#define YUVP_LONGTEXT N_("This renders the font using \"paletized YUV\". " \
"This option is only needed if you want to encode into DVB subtitles" )
#define EFFECT_TEXT N_("Font Effect")
#define EFFECT_LONGTEXT N_("It is possible to apply effects to the rendered " \
"text to improve its readability." )
#define EFFECT_BACKGROUND 1
#define EFFECT_OUTLINE 2
#define EFFECT_OUTLINE_FAT 3
static int pi_effects[] = { 1, 2, 3 };
static const char *ppsz_effects_text[] = { N_("Background"),N_("Outline"),
N_("Fat Outline") };
static int pi_color_values[] = {
0x00000000, 0x00808080, 0x00C0C0C0, 0x00FFFFFF, 0x00800000,
0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x00808000, 0x00008000, 0x00008080,
0x0000FF00, 0x00800080, 0x00000080, 0x000000FF, 0x0000FFFF };
static const char *ppsz_color_descriptions[] = {
N_("Black"), N_("Gray"), N_("Silver"), N_("White"), N_("Maroon"),
N_("Red"), N_("Fuchsia"), N_("Yellow"), N_("Olive"), N_("Green"), N_("Teal"),
N_("Lime"), N_("Purple"), N_("Navy"), N_("Blue"), N_("Aqua") };
vlc_module_begin();
set_shortname( _("Text renderer"));
set_description( _("Freetype2 font renderer") );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_SUBPIC );
add_file( "freetype-font", DEFAULT_FONT, NULL, FONT_TEXT, FONT_LONGTEXT,
false );
add_integer( "freetype-fontsize", 0, NULL, FONTSIZE_TEXT,
FONTSIZE_LONGTEXT, true );
/* opacity valid on 0..255, with default 255 = fully opaque */
add_integer_with_range( "freetype-opacity", 255, 0, 255, NULL,
OPACITY_TEXT, OPACITY_LONGTEXT, true );
/* hook to the color values list, with default 0x00ffffff = white */
add_integer( "freetype-color", 0x00FFFFFF, NULL, COLOR_TEXT,
COLOR_LONGTEXT, false );
change_integer_list( pi_color_values, ppsz_color_descriptions, 0 );
add_integer( "freetype-rel-fontsize", 16, NULL, FONTSIZER_TEXT,
FONTSIZER_LONGTEXT, false );
change_integer_list( pi_sizes, ppsz_sizes_text, 0 );
add_integer( "freetype-effect", 2, NULL, EFFECT_TEXT,
EFFECT_LONGTEXT, false );
change_integer_list( pi_effects, ppsz_effects_text, 0 );
add_bool( "freetype-yuvp", 0, NULL, YUVP_TEXT,
YUVP_LONGTEXT, true );
set_capability( "text renderer", 100 );
add_shortcut( "text" );
set_callbacks( Create, Destroy );
vlc_module_end();
struct line_desc_t
{
/** NULL-terminated list of glyphs making the string */
FT_BitmapGlyph *pp_glyphs;
/** list of relative positions for the glyphs */
FT_Vector *p_glyph_pos;
/** list of RGB information for styled text
* -- if the rendering mode supports it (RenderYUVA) and
* b_new_color_mode is set, then it becomes possible to
* have multicoloured text within the subtitles. */
uint32_t *p_fg_rgb;
uint32_t *p_bg_rgb;
uint8_t *p_fg_bg_ratio; /* 0x00=100% FG --> 0x7F=100% BG */
bool b_new_color_mode;
/** underline information -- only supplied if text should be underlined */
uint16_t *pi_underline_offset;
uint16_t *pi_underline_thickness;
int i_height;
int i_width;
int i_red, i_green, i_blue;
int i_alpha;
line_desc_t *p_next;
};
typedef struct font_stack_t font_stack_t;
struct font_stack_t
{
char *psz_name;
int i_size;
uint32_t i_color; /* ARGB */
uint32_t i_karaoke_bg_color; /* ARGB */
font_stack_t *p_next;
};
typedef struct
{
int i_font_size;
uint32_t i_font_color; /* ARGB */
uint32_t i_karaoke_bg_color; /* ARGB */
bool b_italic;
bool b_bold;
bool b_underline;
char *psz_fontname;
} ft_style_t;
static int Render( filter_t *, subpicture_region_t *, line_desc_t *, int, int);
static void FreeLines( line_desc_t * );
static void FreeLine( line_desc_t * );
#ifdef HAVE_FONTCONFIG
static void FontBuilder( vlc_object_t *p_this);
#endif
/*****************************************************************************
* filter_sys_t: freetype local data
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the freetype specific properties of an output thread.
*****************************************************************************/
struct filter_sys_t
{
FT_Library p_library; /* handle to library */
FT_Face p_face; /* handle to face object */
bool i_use_kerning;
uint8_t i_font_opacity;
int i_font_color;
int i_font_size;
int i_effect;
int i_default_font_size;
int i_display_height;
#ifdef HAVE_FONTCONFIG
FcConfig *p_fontconfig;
bool b_fontconfig_ok;
vlc_mutex_t fontconfig_lock;
#endif
input_attachment_t **pp_font_attachments;
int i_font_attachments;
};
/*****************************************************************************
* Create: allocates osd-text video thread output method
*****************************************************************************
* This function allocates and initializes a Clone vout method.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys;
char *psz_fontfile = NULL;
int i_error;
vlc_value_t val;
vlc_object_t *p_fontbuilder;
/* Allocate structure */
p_filter->p_sys = p_sys = malloc( sizeof( filter_sys_t ) );
if( !p_sys )
{
msg_Err( p_filter, "out of memory" );
return VLC_ENOMEM;
}
p_sys->p_face = 0;
p_sys->p_library = 0;
p_sys->i_font_size = 0;
p_sys->i_display_height = 0;
var_Create( p_filter, "freetype-font",
VLC_VAR_STRING | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-fontsize",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-rel-fontsize",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-opacity",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Create( p_filter, "freetype-effect",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "freetype-opacity", &val );
p_sys->i_font_opacity = __MAX( __MIN( val.i_int, 255 ), 0 );
var_Create( p_filter, "freetype-color",
VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
var_Get( p_filter, "freetype-color", &val );
p_sys->i_font_color = __MAX( __MIN( val.i_int, 0xFFFFFF ), 0 );
p_sys->i_effect = var_GetInteger( p_filter, "freetype-effect" );
/* Look what method was requested */
var_Get( p_filter, "freetype-font", &val );
psz_fontfile = val.psz_string;
if( !psz_fontfile || !*psz_fontfile )
{
free( psz_fontfile );
psz_fontfile = (char *)malloc( PATH_MAX + 1 );
if( !psz_fontfile )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
#ifdef WIN32
GetWindowsDirectory( psz_fontfile, PATH_MAX + 1 );
strcat( psz_fontfile, "\\fonts\\arial.ttf" );
#elif defined(__APPLE__)
strcpy( psz_fontfile, DEFAULT_FONT );
#else
msg_Err( p_filter, "user didn't specify a font" );
goto error;
#endif
}
i_error = FT_Init_FreeType( &p_sys->p_library );
if( i_error )
{
msg_Err( p_filter, "couldn't initialize freetype" );
goto error;
}
i_error = FT_New_Face( p_sys->p_library, psz_fontfile ? psz_fontfile : "",
0, &p_sys->p_face );
if( i_error == FT_Err_Unknown_File_Format )
{
msg_Err( p_filter, "file %s have unknown format", psz_fontfile );
goto error;
}
else if( i_error )
{
msg_Err( p_filter, "failed to load font file %s", psz_fontfile );
goto error;
}
i_error = FT_Select_Charmap( p_sys->p_face, ft_encoding_unicode );
if( i_error )
{
msg_Err( p_filter, "font has no unicode translation table" );
goto error;
}
#ifdef HAVE_FONTCONFIG
vlc_mutex_init( &p_sys->fontconfig_lock );
p_sys->b_fontconfig_ok = false;
p_sys->p_fontconfig = NULL;
/* Check for an existing Fontbuilder thread */
vlc_mutex_t *lock = var_AcquireMutex( "fontbuilder" );
p_fontbuilder = vlc_object_find_name( p_filter->p_libvlc,
"fontlist builder",
FIND_CHILD );
if( ! p_fontbuilder )
{
/* Create the FontBuilder thread as a child of a top-level
* object, so that it can survive the destruction of the
* freetype object - the fontlist only needs to be built once,
* and calling the fontbuild a second time while the first is
* still in progress can cause thread instabilities.
*/
p_fontbuilder = vlc_object_create( p_filter->p_libvlc,
VLC_OBJECT_GENERIC );
if( p_fontbuilder )
{
p_fontbuilder->psz_object_name = strdup( "fontlist builder" );
vlc_object_attach( p_fontbuilder, p_filter->p_libvlc );
var_Create( p_fontbuilder, "build-done", VLC_VAR_BOOL );
var_SetBool( p_fontbuilder, "build-done", false );
var_AddCallback( p_fontbuilder, "build-done", BuildDone, p_sys );
if( vlc_thread_create( p_fontbuilder,
"fontlist builder",
FontBuilder,
VLC_THREAD_PRIORITY_LOW,
false ) )
{
/* Don't destroy the fontconfig object - we won't be able to do
* italics or bold or change the font face, but we will still
* be able to do underline and change the font size.
*/
msg_Warn( p_filter, "fontconfig database builder thread can't "
"be launched. Font styling support will be limited." );
}
}
else
{
vlc_object_release( p_fontbuilder );
}
}
else
{
vlc_object_release( p_fontbuilder );
}
vlc_mutex_unlock( lock );
#endif
p_sys->i_use_kerning = FT_HAS_KERNING( p_sys->p_face );
var_Get( p_filter, "freetype-fontsize", &val );
p_sys->i_default_font_size = val.i_int;
if( SetFontSize( p_filter, 0 ) != VLC_SUCCESS ) goto error;
free( psz_fontfile );
p_sys->pp_font_attachments = NULL;
p_sys->i_font_attachments = 0;
p_filter->pf_render_text = RenderText;
#ifdef HAVE_FONTCONFIG
p_filter->pf_render_html = RenderHtml;
#else
p_filter->pf_render_html = NULL;
#endif
LoadFontsFromAttachments( p_filter );
return VLC_SUCCESS;
error:
if( p_sys->p_face ) FT_Done_Face( p_sys->p_face );
if( p_sys->p_library ) FT_Done_FreeType( p_sys->p_library );
free( psz_fontfile );
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* Destroy: destroy Clone video thread output method
*****************************************************************************
* Clean up all data and library connections
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
filter_sys_t *p_sys = p_filter->p_sys;
if( p_sys->pp_font_attachments )
{
int k;
for( k = 0; k < p_sys->i_font_attachments; k++ )
{
vlc_input_attachment_Delete( p_sys->pp_font_attachments[k] );
}
free( p_sys->pp_font_attachments );
}
#ifdef HAVE_FONTCONFIG
vlc_mutex_t *lock = var_AcquireMutex( "fontbuilder" );
vlc_object_t *p_fontbuilder = vlc_object_find_name( p_filter->p_libvlc,
"fontlist builder", FIND_CHILD );
if( p_fontbuilder )
{
var_DelCallback( p_fontbuilder, "build-done", BuildDone, p_sys );
vlc_object_release( p_fontbuilder );
}
vlc_mutex_unlock( lock );
vlc_mutex_destroy( &p_sys->fontconfig_lock );
if( p_sys->p_fontconfig )
{
FcConfigDestroy( p_sys->p_fontconfig );
p_sys->p_fontconfig = NULL;
}
/* FcFini asserts calling the subfunction FcCacheFini()
* even if no other library functions have been made since FcInit(),
* so don't call it. */
#endif
FT_Done_Face( p_sys->p_face );
FT_Done_FreeType( p_sys->p_library );
free( p_sys );
}
#ifdef HAVE_FONTCONFIG
static void FontBuilder( vlc_object_t *p_this )
{
FcConfig *p_fontconfig = FcInitLoadConfig();
vlc_mutex_t *lock;
vlc_thread_ready( p_this );
if( p_fontconfig )
{
mtime_t t1, t2;
msg_Dbg( p_this, "Building font database..." );
t1 = mdate();
if(! FcConfigBuildFonts( p_fontconfig ))
{
/* Don't destroy the fontconfig object - we won't be able to do
* italics or bold or change the font face, but we will still
* be able to do underline and change the font size.
*/
msg_Err( p_this, "fontconfig database can't be built. "
"Font styling won't be available" );
}
t2 = mdate();
msg_Dbg( p_this, "Finished building font database." );
msg_Dbg( p_this, "Took %ld seconds", (long)((t2 - t1)/1000000) );
lock = var_AcquireMutex( "fontbuilder" );
var_SetBool( p_this, "build-done", true );
FcConfigDestroy( p_fontconfig );
vlc_mutex_unlock( lock );
}
vlc_object_detach( p_this );
vlc_object_release( p_this );
}
#endif
/*****************************************************************************
* Make any TTF/OTF fonts present in the attachments of the media file
* and store them for later use by the FreeType Engine
*****************************************************************************/
static int LoadFontsFromAttachments( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
input_thread_t *p_input;
input_attachment_t **pp_attachments;
int i_attachments_cnt;
int k;
int rv = VLC_SUCCESS;
p_input = (input_thread_t *)vlc_object_find( p_filter, VLC_OBJECT_INPUT, FIND_PARENT );
if( ! p_input )
return VLC_EGENERIC;
if( VLC_SUCCESS != input_Control( p_input, INPUT_GET_ATTACHMENTS, &pp_attachments, &i_attachments_cnt ))
{
vlc_object_release(p_input);
return VLC_EGENERIC;
}
p_sys->i_font_attachments = 0;
p_sys->pp_font_attachments = malloc( i_attachments_cnt * sizeof( input_attachment_t * ));
if(! p_sys->pp_font_attachments )
rv = VLC_ENOMEM;
for( k = 0; k < i_attachments_cnt; k++ )
{
input_attachment_t *p_attach = pp_attachments[k];
if( p_sys->pp_font_attachments )
{
if(( !strcmp( p_attach->psz_mime, "application/x-truetype-font" ) || // TTF
!strcmp( p_attach->psz_mime, "application/x-font-otf" ) ) && // OTF
( p_attach->i_data > 0 ) &&
( p_attach->p_data != NULL ) )
{
p_sys->pp_font_attachments[ p_sys->i_font_attachments++ ] = p_attach;
}
else
{
vlc_input_attachment_Delete( p_attach );
}
}
else
{
vlc_input_attachment_Delete( p_attach );
}
}
free( pp_attachments );
vlc_object_release(p_input);
return rv;
}
/*****************************************************************************
* Render: place string in picture
*****************************************************************************
* This function merges the previously rendered freetype glyphs into a picture
*****************************************************************************/
static int Render( filter_t *p_filter, subpicture_region_t *p_region,
line_desc_t *p_line, int i_width, int i_height )
{
static uint8_t pi_gamma[16] =
{0x00, 0x52, 0x84, 0x96, 0xb8, 0xca, 0xdc, 0xee, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
uint8_t *p_dst;
video_format_t fmt;
int i, x, y, i_pitch;
uint8_t i_y; /* YUV values, derived from incoming RGB */
int8_t i_u, i_v;
subpicture_region_t *p_region_tmp;
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('Y','U','V','P');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_visible_width = i_width + 4;
fmt.i_height = fmt.i_visible_height = i_height + 4;
if( p_region->fmt.i_visible_width > 0 )
fmt.i_visible_width = p_region->fmt.i_visible_width;
if( p_region->fmt.i_visible_height > 0 )
fmt.i_visible_height = p_region->fmt.i_visible_height;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_region_tmp = spu_CreateRegion( p_filter, &fmt );
if( !p_region_tmp )
{
msg_Err( p_filter, "cannot allocate SPU region" );
return VLC_EGENERIC;
}
p_region->fmt = p_region_tmp->fmt;
p_region->picture = p_region_tmp->picture;
free( p_region_tmp );
/* Calculate text color components */
i_y = (uint8_t)(( 66 * p_line->i_red + 129 * p_line->i_green +
25 * p_line->i_blue + 128) >> 8) + 16;
i_u = (int8_t)(( -38 * p_line->i_red - 74 * p_line->i_green +
112 * p_line->i_blue + 128) >> 8) + 128;
i_v = (int8_t)(( 112 * p_line->i_red - 94 * p_line->i_green -
18 * p_line->i_blue + 128) >> 8) + 128;
/* Build palette */
fmt.p_palette->i_entries = 16;
for( i = 0; i < 8; i++ )
{
fmt.p_palette->palette[i][0] = 0;
fmt.p_palette->palette[i][1] = 0x80;
fmt.p_palette->palette[i][2] = 0x80;
fmt.p_palette->palette[i][3] = pi_gamma[i];
fmt.p_palette->palette[i][3] =
(int)fmt.p_palette->palette[i][3] * (255 - p_line->i_alpha) / 255;
}
for( i = 8; i < fmt.p_palette->i_entries; i++ )
{
fmt.p_palette->palette[i][0] = i * 16 * i_y / 256;
fmt.p_palette->palette[i][1] = i_u;
fmt.p_palette->palette[i][2] = i_v;
fmt.p_palette->palette[i][3] = pi_gamma[i];
fmt.p_palette->palette[i][3] =
(int)fmt.p_palette->palette[i][3] * (255 - p_line->i_alpha) / 255;
}
p_dst = p_region->picture.Y_PIXELS;
i_pitch = p_region->picture.Y_PITCH;
/* Initialize the region pixels */
memset( p_dst, 0, i_pitch * p_region->fmt.i_height );
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_line->i_width < i_width )
{
if( (p_region->i_align & 0x3) == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( (p_region->i_align & 0x3) != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 2 ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 2 +
i_align_offset;
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
p_dst[i_offset+x] =
((int)p_glyph->bitmap.buffer[i_bitmap_offset] + 8)/16;
}
i_offset += i_pitch;
}
}
}
/* Outlining (find something better than nearest neighbour filtering ?) */
if( 1 )
{
uint8_t *p_dst = p_region->picture.Y_PIXELS;
uint8_t *p_top = p_dst; /* Use 1st line as a cache */
uint8_t left, current;
for( y = 1; y < (int)fmt.i_height - 1; y++ )
{
if( y > 1 ) memcpy( p_top, p_dst, fmt.i_width );
p_dst += p_region->picture.Y_PITCH;
left = 0;
for( x = 1; x < (int)fmt.i_width - 1; x++ )
{
current = p_dst[x];
p_dst[x] = ( 8 * (int)p_dst[x] + left + p_dst[x+1] + p_top[x -1]+ p_top[x] + p_top[x+1] +
p_dst[x -1 + p_region->picture.Y_PITCH ] + p_dst[x + p_region->picture.Y_PITCH] + p_dst[x + 1 + p_region->picture.Y_PITCH]) / 16;
left = current;
}
}
memset( p_top, 0, fmt.i_width );
}
return VLC_SUCCESS;
}
static void UnderlineGlyphYUVA( int i_line_thickness, int i_line_offset, bool b_ul_next_char,
FT_BitmapGlyph p_this_glyph, FT_Vector *p_this_glyph_pos,
FT_BitmapGlyph p_next_glyph, FT_Vector *p_next_glyph_pos,
int i_glyph_tmax, int i_align_offset,
uint8_t i_y, uint8_t i_u, uint8_t i_v,
subpicture_region_t *p_region)
{
int y, x, z;
int i_pitch;
uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
p_dst_y = p_region->picture.Y_PIXELS;
p_dst_u = p_region->picture.U_PIXELS;
p_dst_v = p_region->picture.V_PIXELS;
p_dst_a = p_region->picture.A_PIXELS;
i_pitch = p_region->picture.A_PITCH;
int i_offset = ( p_this_glyph_pos->y + i_glyph_tmax + i_line_offset + 3 ) * i_pitch +
p_this_glyph_pos->x + p_this_glyph->left + 3 + i_align_offset;
for( y = 0; y < i_line_thickness; y++ )
{
int i_extra = p_this_glyph->bitmap.width;
if( b_ul_next_char )
{
i_extra = (p_next_glyph_pos->x + p_next_glyph->left) -
(p_this_glyph_pos->x + p_this_glyph->left);
}
for( x = 0; x < i_extra; x++ )
{
bool b_ok = true;
/* break the underline around the tails of any glyphs which cross it */
for( z = x - i_line_thickness;
z < x + i_line_thickness && b_ok;
z++ )
{
if( p_next_glyph && ( z >= i_extra ) )
{
int i_row = i_line_offset + p_next_glyph->top + y;
if( ( p_next_glyph->bitmap.rows > i_row ) &&
p_next_glyph->bitmap.buffer[p_next_glyph->bitmap.width * i_row + z-i_extra] )
{
b_ok = false;
}
}
else if ((z > 0 ) && (z < p_this_glyph->bitmap.width))
{
int i_row = i_line_offset + p_this_glyph->top + y;
if( ( p_this_glyph->bitmap.rows > i_row ) &&
p_this_glyph->bitmap.buffer[p_this_glyph->bitmap.width * i_row + z] )
{
b_ok = false;
}
}
}
if( b_ok )
{
p_dst_y[i_offset+x] = (i_y * 255) >> 8;
p_dst_u[i_offset+x] = i_u;
p_dst_v[i_offset+x] = i_v;
p_dst_a[i_offset+x] = 255;
}
}
i_offset += i_pitch;
}
}
static void DrawBlack( line_desc_t *p_line, int i_width, subpicture_region_t *p_region, int xoffset, int yoffset )
{
uint8_t *p_dst = p_region->picture.A_PIXELS;
int i_pitch = p_region->picture.A_PITCH;
int x,y;
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax=0, i = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_line->i_width < i_width )
{
if( (p_region->i_align & 0x3) == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( (p_region->i_align & 0x3) != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 3 + yoffset ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 3 +
i_align_offset +xoffset;
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
if( p_dst[i_offset+x] <
((int)p_glyph->bitmap.buffer[i_bitmap_offset]) )
p_dst[i_offset+x] =
((int)p_glyph->bitmap.buffer[i_bitmap_offset]);
}
i_offset += i_pitch;
}
}
}
}
/*****************************************************************************
* Render: place string in picture
*****************************************************************************
* This function merges the previously rendered freetype glyphs into a picture
*****************************************************************************/
static int RenderYUVA( filter_t *p_filter, subpicture_region_t *p_region,
line_desc_t *p_line, int i_width, int i_height )
{
uint8_t *p_dst_y,*p_dst_u,*p_dst_v,*p_dst_a;
video_format_t fmt;
int i, x, y, i_pitch, i_alpha;
uint8_t i_y, i_u, i_v; /* YUV values, derived from incoming RGB */
subpicture_region_t *p_region_tmp;
if( i_width == 0 || i_height == 0 )
return VLC_SUCCESS;
/* Create a new subpicture region */
memset( &fmt, 0, sizeof(video_format_t) );
fmt.i_chroma = VLC_FOURCC('Y','U','V','A');
fmt.i_aspect = 0;
fmt.i_width = fmt.i_visible_width = i_width + 6;
fmt.i_height = fmt.i_visible_height = i_height + 6;
if( p_region->fmt.i_visible_width > 0 )
fmt.i_visible_width = p_region->fmt.i_visible_width;
if( p_region->fmt.i_visible_height > 0 )
fmt.i_visible_height = p_region->fmt.i_visible_height;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_region_tmp = spu_CreateRegion( p_filter, &fmt );
if( !p_region_tmp )
{
msg_Err( p_filter, "cannot allocate SPU region" );
return VLC_EGENERIC;
}
p_region->fmt = p_region_tmp->fmt;
p_region->picture = p_region_tmp->picture;
free( p_region_tmp );
/* Calculate text color components */
YUVFromRGB( (p_line->i_red << 16) |
(p_line->i_green << 8) |
(p_line->i_blue ),
&i_y, &i_u, &i_v);
i_alpha = p_line->i_alpha;
p_dst_y = p_region->picture.Y_PIXELS;
p_dst_u = p_region->picture.U_PIXELS;
p_dst_v = p_region->picture.V_PIXELS;
p_dst_a = p_region->picture.A_PIXELS;
i_pitch = p_region->picture.A_PITCH;
/* Initialize the region pixels */
if( p_filter->p_sys->i_effect != EFFECT_BACKGROUND )
{
memset( p_dst_y, 0x00, i_pitch * p_region->fmt.i_height );
memset( p_dst_u, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_v, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_a, 0, i_pitch * p_region->fmt.i_height );
}
else
{
memset( p_dst_y, 0x0, i_pitch * p_region->fmt.i_height );
memset( p_dst_u, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_v, 0x80, i_pitch * p_region->fmt.i_height );
memset( p_dst_a, 0x80, i_pitch * p_region->fmt.i_height );
}
if( p_filter->p_sys->i_effect == EFFECT_OUTLINE ||
p_filter->p_sys->i_effect == EFFECT_OUTLINE_FAT )
{
DrawBlack( p_line, i_width, p_region, 0, 0);
DrawBlack( p_line, i_width, p_region, -1, 0);
DrawBlack( p_line, i_width, p_region, 0, -1);
DrawBlack( p_line, i_width, p_region, 1, 0);
DrawBlack( p_line, i_width, p_region, 0, 1);
}
if( p_filter->p_sys->i_effect == EFFECT_OUTLINE_FAT )
{
DrawBlack( p_line, i_width, p_region, -1, -1);
DrawBlack( p_line, i_width, p_region, -1, 1);
DrawBlack( p_line, i_width, p_region, 1, -1);
DrawBlack( p_line, i_width, p_region, 1, 1);
DrawBlack( p_line, i_width, p_region, -2, 0);
DrawBlack( p_line, i_width, p_region, 0, -2);
DrawBlack( p_line, i_width, p_region, 2, 0);
DrawBlack( p_line, i_width, p_region, 0, 2);
DrawBlack( p_line, i_width, p_region, -2, -2);
DrawBlack( p_line, i_width, p_region, -2, 2);
DrawBlack( p_line, i_width, p_region, 2, -2);
DrawBlack( p_line, i_width, p_region, 2, 2);
DrawBlack( p_line, i_width, p_region, -3, 0);
DrawBlack( p_line, i_width, p_region, 0, -3);
DrawBlack( p_line, i_width, p_region, 3, 0);
DrawBlack( p_line, i_width, p_region, 0, 3);
}
for( ; p_line != NULL; p_line = p_line->p_next )
{
int i_glyph_tmax = 0;
int i_bitmap_offset, i_offset, i_align_offset = 0;
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_glyph_tmax = __MAX( i_glyph_tmax, p_glyph->top );
}
if( p_line->i_width < i_width )
{
if( (p_region->i_align & 0x3) == SUBPICTURE_ALIGN_RIGHT )
{
i_align_offset = i_width - p_line->i_width;
}
else if( (p_region->i_align & 0x3) != SUBPICTURE_ALIGN_LEFT )
{
i_align_offset = ( i_width - p_line->i_width ) / 2;
}
}
for( i = 0; p_line->pp_glyphs[i] != NULL; i++ )
{
FT_BitmapGlyph p_glyph = p_line->pp_glyphs[ i ];
i_offset = ( p_line->p_glyph_pos[ i ].y +
i_glyph_tmax - p_glyph->top + 3 ) *
i_pitch + p_line->p_glyph_pos[ i ].x + p_glyph->left + 3 +
i_align_offset;
if( p_line->b_new_color_mode )
{
/* Every glyph can (and in fact must) have its own color */
YUVFromRGB( p_line->p_fg_rgb[ i ], &i_y, &i_u, &i_v );
}
for( y = 0, i_bitmap_offset = 0; y < p_glyph->bitmap.rows; y++ )
{
for( x = 0; x < p_glyph->bitmap.width; x++, i_bitmap_offset++ )
{
uint8_t i_y_local = i_y;
uint8_t i_u_local = i_u;
uint8_t i_v_local = i_v;
if( p_line->p_fg_bg_ratio != 0x00 )
{
int i_split = p_glyph->bitmap.width *
p_line->p_fg_bg_ratio[ i ] / 0x7f;
if( x > i_split )
{
YUVFromRGB( p_line->p_bg_rgb[ i ],
&i_y_local, &i_u_local, &i_v_local );
}
}
if( p_glyph->bitmap.buffer[i_bitmap_offset] )
{
p_dst_y[i_offset+x] = ((p_dst_y[i_offset+x] *(255-(int)p_glyph->bitmap.buffer[i_bitmap_offset])) +
i_y * ((int)p_glyph->bitmap.buffer[i_bitmap_offset])) >> 8;
p_dst_u[i_offset+x] = i_u;
p_dst_v[i_offset+x] = i_v;
if( p_filter->p_sys->i_effect == EFFECT_BACKGROUND )
p_dst_a[i_offset+x] = 0xff;
}
}
i_offset += i_pitch;
}
if( p_line->pi_underline_thickness[ i ] )
{
UnderlineGlyphYUVA( p_line->pi_underline_thickness[ i ],
p_line->pi_underline_offset[ i ],
(p_line->pp_glyphs[i+1] && (p_line->pi_underline_thickness[ i + 1] > 0)),
p_line->pp_glyphs[i], &(p_line->p_glyph_pos[i]),
p_line->pp_glyphs[i+1], &(p_line->p_glyph_pos[i+1]),
i_glyph_tmax, i_align_offset,
i_y, i_u, i_v,
p_region);
}
}
}
/* Apply the alpha setting */
for( i = 0; i < (int)fmt.i_height * i_pitch; i++ )
p_dst_a[i] = p_dst_a[i] * (255 - i_alpha) / 255;
return VLC_SUCCESS;
}
/**
* This function renders a text subpicture region into another one.
* It also calculates the size needed for this string, and renders the
* needed glyphs into memory. It is used as pf_add_string callback in
* the vout method by this module
*/
static int RenderText( filter_t *p_filter, subpicture_region_t *p_region_out,
subpicture_region_t *p_region_in )
{
filter_sys_t *p_sys = p_filter->p_sys;
line_desc_t *p_lines = NULL, *p_line = NULL, *p_next = NULL, *p_prev = NULL;
int i, i_pen_y, i_pen_x, i_error, i_glyph_index, i_previous;
uint32_t *psz_unicode, *psz_unicode_orig = NULL, i_char, *psz_line_start;
int i_string_length;
char *psz_string;
vlc_iconv_t iconv_handle = (vlc_iconv_t)(-1);
int i_font_color, i_font_alpha, i_font_size, i_red, i_green, i_blue;
vlc_value_t val;
int i_scale = 1000;
FT_BBox line;
FT_BBox glyph_size;
FT_Vector result;
FT_Glyph tmp_glyph;
/* Sanity check */
if( !p_region_in || !p_region_out ) return VLC_EGENERIC;
psz_string = p_region_in->psz_text;
if( !psz_string || !*psz_string ) return VLC_EGENERIC;
if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
i_scale = val.i_int;
if( p_region_in->p_style )
{
i_font_color = __MAX( __MIN( p_region_in->p_style->i_font_color, 0xFFFFFF ), 0 );
i_font_alpha = __MAX( __MIN( p_region_in->p_style->i_font_alpha, 255 ), 0 );
i_font_size = __MAX( __MIN( p_region_in->p_style->i_font_size, 255 ), 0 ) * i_scale / 1000;
}
else
{
i_font_color = p_sys->i_font_color;
i_font_alpha = 255 - p_sys->i_font_opacity;
i_font_size = p_sys->i_default_font_size * i_scale / 1000;
}
if( i_font_color == 0xFFFFFF ) i_font_color = p_sys->i_font_color;
if( !i_font_alpha ) i_font_alpha = 255 - p_sys->i_font_opacity;
SetFontSize( p_filter, i_font_size );
i_red = ( i_font_color & 0x00FF0000 ) >> 16;
i_green = ( i_font_color & 0x0000FF00 ) >> 8;
i_blue = i_font_color & 0x000000FF;
result.x = result.y = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
psz_unicode = psz_unicode_orig =
malloc( ( strlen(psz_string) + 1 ) * sizeof(uint32_t) );
if( psz_unicode == NULL )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
#if defined(WORDS_BIGENDIAN)
iconv_handle = vlc_iconv_open( "UCS-4BE", "UTF-8" );
#else
iconv_handle = vlc_iconv_open( "UCS-4LE", "UTF-8" );
#endif
if( iconv_handle == (vlc_iconv_t)-1 )
{
msg_Warn( p_filter, "unable to do conversion" );
goto error;
}
{
char *p_out_buffer;
const char *p_in_buffer = psz_string;
size_t i_in_bytes, i_out_bytes, i_out_bytes_left, i_ret;
i_in_bytes = strlen( psz_string );
i_out_bytes = i_in_bytes * sizeof( uint32_t );
i_out_bytes_left = i_out_bytes;
p_out_buffer = (char *)psz_unicode;
i_ret = vlc_iconv( iconv_handle, (const char**)&p_in_buffer,
&i_in_bytes,
&p_out_buffer, &i_out_bytes_left );
vlc_iconv_close( iconv_handle );
if( i_in_bytes )
{
msg_Warn( p_filter, "failed to convert string to unicode (%m), "
"bytes left %u", (unsigned)i_in_bytes );
goto error;
}
*(uint32_t*)p_out_buffer = 0;
i_string_length = (i_out_bytes - i_out_bytes_left) / sizeof(uint32_t);
}
#if defined(HAVE_FRIBIDI)
{
uint32_t *p_fribidi_string;
int32_t start_pos, pos = 0;
p_fribidi_string = malloc( (i_string_length + 1) * sizeof(uint32_t) );
if( !p_fribidi_string )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
/* Do bidi conversion line-by-line */
while( pos < i_string_length )
{
while( pos < i_string_length )
{
i_char = psz_unicode[pos];
if (i_char != '\r' && i_char != '\n')
break;
p_fribidi_string[pos] = i_char;
++pos;
}
start_pos = pos;
while( pos < i_string_length )
{
i_char = psz_unicode[pos];
if (i_char == '\r' || i_char == '\n')
break;
++pos;
}
if (pos > start_pos)
{
FriBidiCharType base_dir = FRIBIDI_TYPE_LTR;
fribidi_log2vis((FriBidiChar*)psz_unicode + start_pos,
pos - start_pos,
&base_dir,
(FriBidiChar*)p_fribidi_string + start_pos,
0, 0, 0);
}
}
free( psz_unicode_orig );
psz_unicode = psz_unicode_orig = p_fribidi_string;
p_fribidi_string[ i_string_length ] = 0;
}
#endif
/* Calculate relative glyph positions and a bounding box for the
* entire string */
if( !(p_line = NewLine( strlen( psz_string ))) )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
p_lines = p_line;
i_pen_x = i_pen_y = 0;
i_previous = i = 0;
psz_line_start = psz_unicode;
#define face p_sys->p_face
#define glyph face->glyph
while( *psz_unicode )
{
i_char = *psz_unicode++;
if( i_char == '\r' ) /* ignore CR chars wherever they may be */
{
continue;
}
if( i_char == '\n' )
{
psz_line_start = psz_unicode;
if( !(p_next = NewLine( strlen( psz_string ))) )
{
msg_Err( p_filter, "out of memory" );
goto error;
}
p_line->p_next = p_next;
p_line->i_width = line.xMax;
p_line->i_height = face->size->metrics.height >> 6;
p_line->pp_glyphs[ i ] = NULL;
p_line->i_alpha = i_font_alpha;
p_line->i_red = i_red;
p_line->i_green = i_green;
p_line->i_blue = i_blue;
p_prev = p_line;
p_line = p_next;
result.x = __MAX( result.x, line.xMax );
result.y += face->size->metrics.height >> 6;
i_pen_x = 0;
i_previous = i = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
i_pen_y += face->size->metrics.height >> 6;
#if 0
msg_Dbg( p_filter, "Creating new line, i is %d", i );
#endif
continue;
}
i_glyph_index = FT_Get_Char_Index( face, i_char );
if( p_sys->i_use_kerning && i_glyph_index
&& i_previous )
{
FT_Vector delta;
FT_Get_Kerning( face, i_previous, i_glyph_index,
ft_kerning_default, &delta );
i_pen_x += delta.x >> 6;
}
p_line->p_glyph_pos[ i ].x = i_pen_x;
p_line->p_glyph_pos[ i ].y = i_pen_y;
i_error = FT_Load_Glyph( face, i_glyph_index, FT_LOAD_DEFAULT );
if( i_error )
{
msg_Err( p_filter, "unable to render text FT_Load_Glyph returned"
" %d", i_error );
goto error;
}
i_error = FT_Get_Glyph( glyph, &tmp_glyph );
if( i_error )
{
msg_Err( p_filter, "unable to render text FT_Get_Glyph returned "
"%d", i_error );
goto error;
}
FT_Glyph_Get_CBox( tmp_glyph, ft_glyph_bbox_pixels, &glyph_size );
i_error = FT_Glyph_To_Bitmap( &tmp_glyph, ft_render_mode_normal, 0, 1);
if( i_error )
{
FT_Done_Glyph( tmp_glyph );
continue;
}
p_line->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
/* Do rest */
line.xMax = p_line->p_glyph_pos[i].x + glyph_size.xMax -
glyph_size.xMin + ((FT_BitmapGlyph)tmp_glyph)->left;
if( line.xMax > (int)p_filter->fmt_out.video.i_visible_width - 20 )
{
FT_Done_Glyph( (FT_Glyph)p_line->pp_glyphs[ i ] );
p_line->pp_glyphs[ i ] = NULL;
FreeLine( p_line );
p_line = NewLine( strlen( psz_string ));
if( p_prev ) p_prev->p_next = p_line;
else p_lines = p_line;
uint32_t *psz_unicode_saved = psz_unicode;
while( psz_unicode > psz_line_start && *psz_unicode != ' ' )
{
psz_unicode--;
}
if( psz_unicode == psz_line_start )
{ /* try harder to break that line */
psz_unicode = psz_unicode_saved;
while( psz_unicode > psz_line_start &&
*psz_unicode != '_' && *psz_unicode != '/' &&
*psz_unicode != '\\' && *psz_unicode != '.' )
{
psz_unicode--;
}
}
if( psz_unicode == psz_line_start )
{
msg_Warn( p_filter, "unbreakable string" );
goto error;
}
else
{
*psz_unicode = '\n';
}
psz_unicode = psz_line_start;
i_pen_x = 0;
i_previous = i = 0;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
continue;
}
line.yMax = __MAX( line.yMax, glyph_size.yMax );
line.yMin = __MIN( line.yMin, glyph_size.yMin );
i_previous = i_glyph_index;
i_pen_x += glyph->advance.x >> 6;
i++;
}
p_line->i_width = line.xMax;
p_line->i_height = face->size->metrics.height >> 6;
p_line->pp_glyphs[ i ] = NULL;
p_line->i_alpha = i_font_alpha;
p_line->i_red = i_red;
p_line->i_green = i_green;
p_line->i_blue = i_blue;
result.x = __MAX( result.x, line.xMax );
result.y += line.yMax - line.yMin;
#undef face
#undef glyph
p_region_out->i_x = p_region_in->i_x;
p_region_out->i_y = p_region_in->i_y;
if( config_GetInt( p_filter, "freetype-yuvp" ) )
Render( p_filter, p_region_out, p_lines, result.x, result.y );
else
RenderYUVA( p_filter, p_region_out, p_lines, result.x, result.y );
free( psz_unicode_orig );
FreeLines( p_lines );
return VLC_SUCCESS;
error:
free( psz_unicode_orig );
FreeLines( p_lines );
return VLC_EGENERIC;
}
#ifdef HAVE_FONTCONFIG
static ft_style_t *CreateStyle( char *psz_fontname, int i_font_size,
uint32_t i_font_color, uint32_t i_karaoke_bg_color, bool b_bold,
bool b_italic, bool b_uline )
{
ft_style_t *p_style = malloc( sizeof( ft_style_t ));
if( p_style )
{
p_style->i_font_size = i_font_size;
p_style->i_font_color = i_font_color;
p_style->i_karaoke_bg_color = i_karaoke_bg_color;
p_style->b_italic = b_italic;
p_style->b_bold = b_bold;
p_style->b_underline = b_uline;
p_style->psz_fontname = strdup( psz_fontname );
}
return p_style;
}
static void DeleteStyle( ft_style_t *p_style )
{
if( p_style )
{
free( p_style->psz_fontname );
free( p_style );
}
}
static bool StyleEquals( ft_style_t *s1, ft_style_t *s2 )
{
if( !s1 || !s2 )
return false;
if( s1 == s2 )
return true;
if(( s1->i_font_size == s2->i_font_size ) &&
( s1->i_font_color == s2->i_font_color ) &&
( s1->b_italic == s2->b_italic ) &&
( s1->b_bold == s2->b_bold ) &&
( s1->b_underline == s2->b_underline ) &&
( !strcmp( s1->psz_fontname, s2->psz_fontname )))
{
return true;
}
return false;
}
static int PushFont( font_stack_t **p_font, const char *psz_name, int i_size,
uint32_t i_color, uint32_t i_karaoke_bg_color )
{
font_stack_t *p_new;
if( !p_font )
return VLC_EGENERIC;
p_new = malloc( sizeof( font_stack_t ) );
if( ! p_new )
return VLC_ENOMEM;
p_new->p_next = NULL;
if( psz_name )
p_new->psz_name = strdup( psz_name );
else
p_new->psz_name = NULL;
p_new->i_size = i_size;
p_new->i_color = i_color;
p_new->i_karaoke_bg_color = i_karaoke_bg_color;
if( !*p_font )
{
*p_font = p_new;
}
else
{
font_stack_t *p_last;
for( p_last = *p_font;
p_last->p_next;
p_last = p_last->p_next )
;
p_last->p_next = p_new;
}
return VLC_SUCCESS;
}
static int PopFont( font_stack_t **p_font )
{
font_stack_t *p_last, *p_next_to_last;
if( !p_font || !*p_font )
return VLC_EGENERIC;
p_next_to_last = NULL;
for( p_last = *p_font;
p_last->p_next;
p_last = p_last->p_next )
{
p_next_to_last = p_last;
}
if( p_next_to_last )
p_next_to_last->p_next = NULL;
else
*p_font = NULL;
free( p_last->psz_name );
free( p_last );
return VLC_SUCCESS;
}
static int PeekFont( font_stack_t **p_font, char **psz_name, int *i_size,
uint32_t *i_color, uint32_t *i_karaoke_bg_color )
{
font_stack_t *p_last;
if( !p_font || !*p_font )
return VLC_EGENERIC;
for( p_last=*p_font;
p_last->p_next;
p_last=p_last->p_next )
;
*psz_name = p_last->psz_name;
*i_size = p_last->i_size;
*i_color = p_last->i_color;
*i_karaoke_bg_color = p_last->i_karaoke_bg_color;
return VLC_SUCCESS;
}
static void IconvText( filter_t *p_filter, const char *psz_string,
uint32_t *i_string_length, uint32_t **ppsz_unicode )
{
vlc_iconv_t iconv_handle = (vlc_iconv_t)(-1);
/* If memory hasn't been allocated for our output string, allocate it here
* - the calling function must now be responsible for freeing it.
*/
if( !*ppsz_unicode )
*ppsz_unicode = (uint32_t *)
malloc( (strlen( psz_string ) + 1) * sizeof( uint32_t ));
/* We don't need to handle a NULL pointer in *ppsz_unicode
* if we are instead testing for a non NULL value like we are here */
if( *ppsz_unicode )
{
#if defined(WORDS_BIGENDIAN)
iconv_handle = vlc_iconv_open( "UCS-4BE", "UTF-8" );
#else
iconv_handle = vlc_iconv_open( "UCS-4LE", "UTF-8" );
#endif
if( iconv_handle != (vlc_iconv_t)-1 )
{
char *p_in_buffer, *p_out_buffer;
size_t i_in_bytes, i_out_bytes, i_out_bytes_left, i_ret;
i_in_bytes = strlen( psz_string );
i_out_bytes = i_in_bytes * sizeof( uint32_t );
i_out_bytes_left = i_out_bytes;
p_in_buffer = (char *) psz_string;
p_out_buffer = (char *) *ppsz_unicode;
i_ret = vlc_iconv( iconv_handle, (const char**)&p_in_buffer,
&i_in_bytes, &p_out_buffer, &i_out_bytes_left );
vlc_iconv_close( iconv_handle );
if( i_in_bytes )
{
msg_Warn( p_filter, "failed to convert string to unicode (%m), "
"bytes left %u", (unsigned)i_in_bytes );
}
else
{
*(uint32_t*)p_out_buffer = 0;
*i_string_length =
(i_out_bytes - i_out_bytes_left) / sizeof(uint32_t);
}
}
else
{
msg_Warn( p_filter, "unable to do conversion" );
}
}
}
static ft_style_t *GetStyleFromFontStack( filter_sys_t *p_sys,
font_stack_t **p_fonts, bool b_bold, bool b_italic,
bool b_uline )
{
ft_style_t *p_style = NULL;
char *psz_fontname = NULL;
uint32_t i_font_color = p_sys->i_font_color & 0x00ffffff;
uint32_t i_karaoke_bg_color = i_font_color;
int i_font_size = p_sys->i_font_size;
if( VLC_SUCCESS == PeekFont( p_fonts, &psz_fontname, &i_font_size,
&i_font_color, &i_karaoke_bg_color ))
{
p_style = CreateStyle( psz_fontname, i_font_size, i_font_color,
i_karaoke_bg_color, b_bold, b_italic, b_uline );
}
return p_style;
}
static int RenderTag( filter_t *p_filter, FT_Face p_face, int i_font_color,
bool b_uline, int i_karaoke_bgcolor,
line_desc_t *p_line, uint32_t *psz_unicode,
int *pi_pen_x, int i_pen_y, int *pi_start,
FT_Vector *p_result )
{
FT_BBox line;
int i_yMin, i_yMax;
int i;
bool b_first_on_line = true;
int i_previous = 0;
int i_pen_x_start = *pi_pen_x;
uint32_t *psz_unicode_start = psz_unicode;
line.xMin = line.xMax = line.yMin = line.yMax = 0;
/* Account for part of line already in position */
for( i=0; i<*pi_start; i++ )
{
FT_BBox glyph_size;
FT_Glyph_Get_CBox( (FT_Glyph) p_line->pp_glyphs[ i ],
ft_glyph_bbox_pixels, &glyph_size );
line.xMax = p_line->p_glyph_pos[ i ].x + glyph_size.xMax -
glyph_size.xMin + p_line->pp_glyphs[ i ]->left;
line.yMax = __MAX( line.yMax, glyph_size.yMax );
line.yMin = __MIN( line.yMin, glyph_size.yMin );
}
i_yMin = line.yMin;
i_yMax = line.yMax;
if( line.xMax > 0 )
b_first_on_line = false;
while( *psz_unicode && ( *psz_unicode != '\n' ) )
{
FT_BBox glyph_size;
FT_Glyph tmp_glyph;
int i_error;
int i_glyph_index = FT_Get_Char_Index( p_face, *psz_unicode++ );
if( FT_HAS_KERNING( p_face ) && i_glyph_index
&& i_previous )
{
FT_Vector delta;
FT_Get_Kerning( p_face, i_previous, i_glyph_index,
ft_kerning_default, &delta );
*pi_pen_x += delta.x >> 6;
}
p_line->p_glyph_pos[ i ].x = *pi_pen_x;
p_line->p_glyph_pos[ i ].y = i_pen_y;
i_error = FT_Load_Glyph( p_face, i_glyph_index, FT_LOAD_DEFAULT );
if( i_error )
{
msg_Err( p_filter,
"unable to render text FT_Load_Glyph returned %d", i_error );
p_line->pp_glyphs[ i ] = NULL;
return VLC_EGENERIC;
}
i_error = FT_Get_Glyph( p_face->glyph, &tmp_glyph );
if( i_error )
{
msg_Err( p_filter,
"unable to render text FT_Get_Glyph returned %d", i_error );
p_line->pp_glyphs[ i ] = NULL;
return VLC_EGENERIC;
}
FT_Glyph_Get_CBox( tmp_glyph, ft_glyph_bbox_pixels, &glyph_size );
i_error = FT_Glyph_To_Bitmap( &tmp_glyph, FT_RENDER_MODE_NORMAL, 0, 1);
if( i_error )
{
FT_Done_Glyph( tmp_glyph );
continue;
}
if( b_uline )
{
float aOffset = FT_FLOOR(FT_MulFix(p_face->underline_position,
p_face->size->metrics.y_scale));
float aSize = FT_CEIL(FT_MulFix(p_face->underline_thickness,
p_face->size->metrics.y_scale));
p_line->pi_underline_offset[ i ] =
( aOffset < 0 ) ? -aOffset : aOffset;
p_line->pi_underline_thickness[ i ] =
( aSize < 0 ) ? -aSize : aSize;
}
p_line->pp_glyphs[ i ] = (FT_BitmapGlyph)tmp_glyph;
p_line->p_fg_rgb[ i ] = i_font_color & 0x00ffffff;
p_line->p_bg_rgb[ i ] = i_karaoke_bgcolor & 0x00ffffff;
p_line->p_fg_bg_ratio[ i ] = 0x00;
line.xMax = p_line->p_glyph_pos[i].x + glyph_size.xMax -
glyph_size.xMin + ((FT_BitmapGlyph)tmp_glyph)->left;
if( line.xMax > (int)p_filter->fmt_out.video.i_visible_width - 20 )
{
while( --i > *pi_start )
{
FT_Done_Glyph( (FT_Glyph)p_line->pp_glyphs[ i ] );
}
while( psz_unicode > psz_unicode_start && *psz_unicode != ' ' )
{
psz_unicode--;
}
if( psz_unicode == psz_unicode_start )
{
if( b_first_on_line )
{
msg_Warn( p_filter, "unbreakable string" );
p_line->pp_glyphs[ i ] = NULL;
return VLC_EGENERIC;
}
*pi_pen_x = i_pen_x_start;
p_line->i_width = line.xMax;
p_line->i_height = __MAX( p_line->i_height,
p_face->size->metrics.height >> 6 );
p_line->pp_glyphs[ i ] = NULL;
p_result->x = __MAX( p_result->x, line.xMax );
p_result->y = __MAX( p_result->y, __MAX( p_line->i_height,
i_yMax - i_yMin ) );
*pi_start = i;
return VLC_SUCCESS;
}
else
{
*psz_unicode = '\n';
}
psz_unicode = psz_unicode_start;
*pi_pen_x = i_pen_x_start;
i_previous = 0;
line.yMax = i_yMax;
line.yMin = i_yMin;
continue;
}
line.yMax = __MAX( line.yMax, glyph_size.yMax );
line.yMin = __MIN( line.yMin, glyph_size.yMin );
i_previous = i_glyph_index;
*pi_pen_x += p_face->glyph->advance.x >> 6;
i++;
}
p_line->i_width = line.xMax;
p_line->i_height = __MAX( p_line->i_height,
p_face->size->metrics.height >> 6 );
p_line->pp_glyphs[ i ] = NULL;
p_result->x = __MAX( p_result->x, line.xMax );
p_result->y = __MAX( p_result->y, __MAX( p_line->i_height,
line.yMax - line.yMin ) );
*pi_start = i;
/* Get rid of any text processed - if necessary repositioning
* at the start of a new line of text
*/
if( !*psz_unicode )
{
*psz_unicode_start = '\0';
}
else if( psz_unicode > psz_unicode_start )
{
for( i=0; psz_unicode[ i ]; i++ )
psz_unicode_start[ i ] = psz_unicode[ i ];
psz_unicode_start[ i ] = '\0';
}
return VLC_SUCCESS;
}
static int HandleFontAttributes( xml_reader_t *p_xml_reader,
font_stack_t **p_fonts, int i_scale )
{
int rv;
char *psz_fontname = NULL;
uint32_t i_font_color = 0xffffff;
int i_font_alpha = 0;
uint32_t i_karaoke_bg_color = 0x00ffffff;
int i_font_size = 24;
/* Default all attributes to the top font in the stack -- in case not
* all attributes are specified in the sub-font
*/
if( VLC_SUCCESS == PeekFont( p_fonts,
&psz_fontname,
&i_font_size,
&i_font_color,
&i_karaoke_bg_color ))
{
psz_fontname = strdup( psz_fontname );
i_font_size = i_font_size * 1000 / i_scale;
}
i_font_alpha = (i_font_color >> 24) & 0xff;
i_font_color &= 0x00ffffff;
while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
{
char *psz_name = xml_ReaderName( p_xml_reader );
char *psz_value = xml_ReaderValue( p_xml_reader );
if( psz_name && psz_value )
{
if( !strcasecmp( "face", psz_name ) )
{
free( psz_fontname );
psz_fontname = strdup( psz_value );
}
else if( !strcasecmp( "size", psz_name ) )
{
if( ( *psz_value == '+' ) || ( *psz_value == '-' ) )
{
int i_value = atoi( psz_value );
if( ( i_value >= -5 ) && ( i_value <= 5 ) )
i_font_size += ( i_value * i_font_size ) / 10;
else if( i_value < -5 )
i_font_size = - i_value;
else if( i_value > 5 )
i_font_size = i_value;
}
else
i_font_size = atoi( psz_value );
}
else if( !strcasecmp( "color", psz_name ) &&
( psz_value[0] == '#' ) )
{
i_font_color = strtol( psz_value + 1, NULL, 16 );
i_font_color &= 0x00ffffff;
}
else if( !strcasecmp( "alpha", psz_name ) &&
( psz_value[0] == '#' ) )
{
i_font_alpha = strtol( psz_value + 1, NULL, 16 );
i_font_alpha &= 0xff;
}
free( psz_name );
free( psz_value );
}
}
rv = PushFont( p_fonts,
psz_fontname,
i_font_size * i_scale / 1000,
(i_font_color & 0xffffff) | ((i_font_alpha & 0xff) << 24),
i_karaoke_bg_color );
free( psz_fontname );
return rv;
}
static void SetupLine( filter_t *p_filter, const char *psz_text_in,
uint32_t **psz_text_out, uint32_t *pi_runs,
uint32_t **ppi_run_lengths, ft_style_t ***ppp_styles,
ft_style_t *p_style )
{
uint32_t i_string_length = 0;
IconvText( p_filter, psz_text_in, &i_string_length, psz_text_out );
*psz_text_out += i_string_length;
if( ppp_styles && ppi_run_lengths )
{
(*pi_runs)++;
if( *ppp_styles )
{
*ppp_styles = (ft_style_t **)
realloc( *ppp_styles, *pi_runs * sizeof( ft_style_t * ) );
}
else if( *pi_runs == 1 )
{
*ppp_styles = (ft_style_t **)
malloc( *pi_runs * sizeof( ft_style_t * ) );
}
/* We have just malloc'ed this memory successfully -
* *pi_runs HAS to be within the memory area of *ppp_styles */
if( *ppp_styles )
{
(*ppp_styles)[ *pi_runs - 1 ] = p_style;
p_style = NULL;
}
if( *ppi_run_lengths )
{
*ppi_run_lengths = (uint32_t *)
realloc( *ppi_run_lengths, *pi_runs * sizeof( uint32_t ) );
}
else if( *pi_runs == 1 )
{
*ppi_run_lengths = (uint32_t *)
malloc( *pi_runs * sizeof( uint32_t ) );
}
/* same remarks here */
if( *ppi_run_lengths )
{
(*ppi_run_lengths)[ *pi_runs - 1 ] = i_string_length;
}
}
/* If we couldn't use the p_style argument due to memory allocation
* problems above, release it here.
*/
if( p_style ) DeleteStyle( p_style );
}
static void SetKaraokeLen( uint32_t i_runs, uint32_t *pi_run_lengths,
uint32_t i_k_runs, uint32_t *pi_k_run_lengths )
{
/* Karaoke tags _PRECEDE_ the text they specify a duration
* for, therefore we are working out the length for the
* previous tag, and first time through we have nothing
*/
if( pi_k_run_lengths )
{
int i_chars = 0;
uint32_t i;
/* Work out how many characters are presently in the string
*/
for( i = 0; i < i_runs; i++ )
i_chars += pi_run_lengths[ i ];
/* Subtract away those we've already allocated to other
* karaoke tags
*/
for( i = 0; i < i_k_runs; i++ )
i_chars -= pi_k_run_lengths[ i ];
pi_k_run_lengths[ i_k_runs - 1 ] = i_chars;
}
}
static void SetupKaraoke( xml_reader_t *p_xml_reader, uint32_t *pi_k_runs,
uint32_t **ppi_k_run_lengths,
uint32_t **ppi_k_durations )
{
while ( xml_ReaderNextAttr( p_xml_reader ) == VLC_SUCCESS )
{
char *psz_name = xml_ReaderName( p_xml_reader );
char *psz_value = xml_ReaderValue( p_xml_reader );
if( psz_name && psz_value &&
!strcasecmp( "t", psz_name ) )
{
if( ppi_k_durations && ppi_k_run_lengths )
{
(*pi_k_runs)++;
if( *ppi_k_durations )
{
*ppi_k_durations = (uint32_t *)
realloc( *ppi_k_durations,
*pi_k_runs * sizeof( uint32_t ) );
}
else if( *pi_k_runs == 1 )
{
*ppi_k_durations = (uint32_t *)
malloc( *pi_k_runs * sizeof( uint32_t ) );
}
if( *ppi_k_run_lengths )
{
*ppi_k_run_lengths = (uint32_t *)
realloc( *ppi_k_run_lengths,
*pi_k_runs * sizeof( uint32_t ) );
}
else if( *pi_k_runs == 1 )
{
*ppi_k_run_lengths = (uint32_t *)
malloc( *pi_k_runs * sizeof( uint32_t ) );
}
if( *ppi_k_durations )
(*ppi_k_durations)[ *pi_k_runs - 1 ] = atoi( psz_value );
if( *ppi_k_run_lengths )
(*ppi_k_run_lengths)[ *pi_k_runs - 1 ] = 0;
}
}
free( psz_name );
free( psz_value );
}
}
static int ProcessNodes( filter_t *p_filter,
xml_reader_t *p_xml_reader,
text_style_t *p_font_style,
uint32_t *psz_text,
int *pi_len,
uint32_t *pi_runs,
uint32_t **ppi_run_lengths,
ft_style_t ***ppp_styles,
bool b_karaoke,
uint32_t *pi_k_runs,
uint32_t **ppi_k_run_lengths,
uint32_t **ppi_k_durations )
{
int rv = VLC_SUCCESS;
filter_sys_t *p_sys = p_filter->p_sys;
uint32_t *psz_text_orig = psz_text;
font_stack_t *p_fonts = NULL;
vlc_value_t val;
int i_scale = 1000;
char *psz_node = NULL;
bool b_italic = false;
bool b_bold = false;
bool b_uline = false;
if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
i_scale = val.i_int;
if( p_font_style )
{
rv = PushFont( &p_fonts,
p_font_style->psz_fontname,
p_font_style->i_font_size * i_scale / 1000,
(p_font_style->i_font_color & 0xffffff) |
((p_font_style->i_font_alpha & 0xff) << 24),
(p_font_style->i_karaoke_background_color & 0xffffff) |
((p_font_style->i_karaoke_background_alpha & 0xff) << 24));
if( p_font_style->i_style_flags & STYLE_BOLD )
b_bold = true;
if( p_font_style->i_style_flags & STYLE_ITALIC )
b_italic = true;
if( p_font_style->i_style_flags & STYLE_UNDERLINE )
b_uline = true;
}
else
{
rv = PushFont( &p_fonts,
FC_DEFAULT_FONT,
p_sys->i_font_size,
0x00ffffff,
0x00ffffff );
}
if( rv != VLC_SUCCESS )
return rv;
while ( ( xml_ReaderRead( p_xml_reader ) == 1 ) )
{
switch ( xml_ReaderNodeType( p_xml_reader ) )
{
case XML_READER_NONE:
break;
case XML_READER_ENDELEM:
psz_node = xml_ReaderName( p_xml_reader );
if( psz_node )
{
if( !strcasecmp( "font", psz_node ) )
PopFont( &p_fonts );
else if( !strcasecmp( "b", psz_node ) )
b_bold = false;
else if( !strcasecmp( "i", psz_node ) )
b_italic = false;
else if( !strcasecmp( "u", psz_node ) )
b_uline = false;
free( psz_node );
}
break;
case XML_READER_STARTELEM:
psz_node = xml_ReaderName( p_xml_reader );
if( psz_node )
{
if( !strcasecmp( "font", psz_node ) )
rv = HandleFontAttributes( p_xml_reader, &p_fonts, i_scale );
else if( !strcasecmp( "b", psz_node ) )
b_bold = true;
else if( !strcasecmp( "i", psz_node ) )
b_italic = true;
else if( !strcasecmp( "u", psz_node ) )
b_uline = true;
else if( !strcasecmp( "br", psz_node ) )
{
SetupLine( p_filter, "\n", &psz_text,
pi_runs, ppi_run_lengths, ppp_styles,
GetStyleFromFontStack( p_sys,
&p_fonts,
b_bold,
b_italic,
b_uline ) );
}
else if( !strcasecmp( "k", psz_node ) )
{
/* Only valid in karaoke */
if( b_karaoke )
{
if( *pi_k_runs > 0 )
{
SetKaraokeLen( *pi_runs, *ppi_run_lengths,
*pi_k_runs, *ppi_k_run_lengths );
}
SetupKaraoke( p_xml_reader, pi_k_runs,
ppi_k_run_lengths, ppi_k_durations );
}
}
free( psz_node );
}
break;
case XML_READER_TEXT:
psz_node = xml_ReaderValue( p_xml_reader );
if( psz_node )
{
/* Turn any multiple-whitespaces into single spaces */
char *s = strpbrk( psz_node, "\t\r\n " );
while( s )
{
int i_whitespace = strspn( s, "\t\r\n " );
if( i_whitespace > 1 )
memmove( &s[1],
&s[i_whitespace],
strlen( s ) - i_whitespace + 1 );
*s++ = ' ';
s = strpbrk( s, "\t\r\n " );
}
SetupLine( p_filter, psz_node, &psz_text,
pi_runs, ppi_run_lengths, ppp_styles,
GetStyleFromFontStack( p_sys,
&p_fonts,
b_bold,
b_italic,
b_uline ) );
free( psz_node );
}
break;
}
if( rv != VLC_SUCCESS )
{
psz_text = psz_text_orig;
break;
}
}
if( b_karaoke )
{
SetKaraokeLen( *pi_runs, *ppi_run_lengths,
*pi_k_runs, *ppi_k_run_lengths );
}
*pi_len = psz_text - psz_text_orig;
while( VLC_SUCCESS == PopFont( &p_fonts ) );
return rv;
}
static int CheckForEmbeddedFont( filter_sys_t *p_sys, FT_Face *pp_face, ft_style_t *p_style )
{
int k;
for( k=0; k < p_sys->i_font_attachments; k++ )
{
input_attachment_t *p_attach = p_sys->pp_font_attachments[k];
int i_font_idx = 0;
FT_Face p_face = NULL;
while( 0 == FT_New_Memory_Face( p_sys->p_library,
p_attach->p_data,
p_attach->i_data,
i_font_idx,
&p_face ))
{
if( p_face )
{
bool match = !strcasecmp( p_face->family_name,
p_style->psz_fontname );
if( p_face->style_flags & FT_STYLE_FLAG_BOLD )
match = match && p_style->b_bold;
else
match = match && !p_style->b_bold;
if( p_face->style_flags & FT_STYLE_FLAG_ITALIC )
match = match && p_style->b_italic;
else
match = match && !p_style->b_italic;
if( match )
{
*pp_face = p_face;
return VLC_SUCCESS;
}
FT_Done_Face( p_face );
}
i_font_idx++;
}
}
return VLC_EGENERIC;
}
static int BuildDone( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *param )
{
(void)p_this;
(void)psz_var;
(void)oldval;
((filter_sys_t*)param)->b_fontconfig_ok = newval.b_bool;
assert( newval.b_bool );
return VLC_SUCCESS;
}
static int ProcessLines( filter_t *p_filter,
uint32_t *psz_text,
int i_len,
uint32_t i_runs,
uint32_t *pi_run_lengths,
ft_style_t **pp_styles,
line_desc_t **pp_lines,
FT_Vector *p_result,
bool b_karaoke,
uint32_t i_k_runs,
uint32_t *pi_k_run_lengths,
uint32_t *pi_k_durations )
{
filter_sys_t *p_sys = p_filter->p_sys;
ft_style_t **pp_char_styles;
int *p_new_positions = NULL;
int8_t *p_levels = NULL;
uint8_t *pi_karaoke_bar = NULL;
uint32_t i, j, k;
int i_prev;
/* Assign each character in the text string its style explicitly, so that
* after the characters have been shuffled around by Fribidi, we can re-apply
* the styles, and to simplify the calculation of runs within a line.
*/
pp_char_styles = (ft_style_t **) malloc( i_len * sizeof( ft_style_t * ));
if( !pp_char_styles )
return VLC_ENOMEM;
if( b_karaoke )
{
pi_karaoke_bar = (uint8_t *) malloc( i_len * sizeof( uint8_t ));
/* If we can't allocate sufficient memory for karaoke, continue anyway -
* we just won't be able to display the progress bar; at least we'll
* get the text.
*/
}
i = 0;
for( j = 0; j < i_runs; j++ )
for( k = 0; k < pi_run_lengths[ j ]; k++ )
pp_char_styles[ i++ ] = pp_styles[ j ];
#if defined(HAVE_FRIBIDI)
{
ft_style_t **pp_char_styles_new;
int *p_old_positions;
uint32_t *p_fribidi_string;
int start_pos, pos = 0;
pp_char_styles_new = (ft_style_t **)
malloc( i_len * sizeof( ft_style_t * ));
p_fribidi_string = (uint32_t *)
malloc( (i_len + 1) * sizeof(uint32_t) );
p_old_positions = (int *)
malloc( (i_len + 1) * sizeof( int ) );
p_new_positions = (int *)
malloc( (i_len + 1) * sizeof( int ) );
p_levels = (int8_t *)
malloc( (i_len + 1) * sizeof( int8_t ) );
if( ! pp_char_styles_new ||
! p_fribidi_string ||
! p_old_positions ||
! p_new_positions ||
! p_levels )
{
msg_Err( p_filter, "out of memory" );
free( p_levels );
free( p_old_positions );
free( p_new_positions );
free( p_fribidi_string );
free( pp_char_styles_new );
free( pi_karaoke_bar );
free( pp_char_styles );
return VLC_ENOMEM;
}
/* Do bidi conversion line-by-line */
while(pos < i_len)
{
while(pos < i_len) {
if (psz_text[pos] != '\n')
break;
p_fribidi_string[pos] = psz_text[pos];
pp_char_styles_new[pos] = pp_char_styles[pos];
p_new_positions[pos] = pos;
p_levels[pos] = 0;
++pos;
}
start_pos = pos;
while(pos < i_len) {
if (psz_text[pos] == '\n')
break;
++pos;
}
if (pos > start_pos)
{
FriBidiCharType base_dir = FRIBIDI_TYPE_LTR;
fribidi_log2vis((FriBidiChar*)psz_text + start_pos,
pos - start_pos, &base_dir,
(FriBidiChar*)p_fribidi_string + start_pos,
p_new_positions + start_pos,
p_old_positions,
p_levels + start_pos );
for( j = (uint32_t) start_pos; j < (uint32_t) pos; j++ )
{
pp_char_styles_new[ j ] = pp_char_styles[ start_pos +
p_old_positions[ j - start_pos ] ];
p_new_positions[ j ] += start_pos;
}
}
}
free( p_old_positions );
free( pp_char_styles );
pp_char_styles = pp_char_styles_new;
psz_text = p_fribidi_string;
p_fribidi_string[ i_len ] = 0;
}
#endif
/* Work out the karaoke */
if( pi_karaoke_bar )
{
int64_t i_last_duration = 0;
int64_t i_duration = 0;
int64_t i_start_pos = 0;
int64_t i_elapsed = var_GetTime( p_filter, "spu-elapsed" ) / 1000;
for( k = 0; k< i_k_runs; k++ )
{
double fraction = 0.0;
i_duration += pi_k_durations[ k ];
if( i_duration < i_elapsed )
{
/* Completely finished this run-length -
* let it render normally */
fraction = 1.0;
}
else if( i_elapsed < i_last_duration )
{
/* Haven't got up to this segment yet -
* render it completely in karaoke BG mode */
fraction = 0.0;
}
else
{
/* Partway through this run */
fraction = (double)(i_elapsed - i_last_duration) /
(double)pi_k_durations[ k ];
}
for( i = 0; i < pi_k_run_lengths[ k ]; i++ )
{
double shade = pi_k_run_lengths[ k ] * fraction;
if( p_new_positions )
j = p_new_positions[ i_start_pos + i ];
else
j = i_start_pos + i;
if( i < (uint32_t)shade )
pi_karaoke_bar[ j ] = 0xff;
else if( (double)i > shade )
pi_karaoke_bar[ j ] = 0x00;
else
{
shade -= (int)shade;
pi_karaoke_bar[ j ] = ((int)(shade * 128.0) & 0x7f) |
((p_levels ? (p_levels[ j ] % 2) : 0 ) << 7);
}
}
i_last_duration = i_duration;
i_start_pos += pi_k_run_lengths[ k ];
}
}
free( p_levels );
free( p_new_positions );
FT_Vector tmp_result;
line_desc_t *p_line = NULL;
line_desc_t *p_prev = NULL;
int i_pen_x = 0;
int i_pen_y = 0;
int i_posn = 0;
p_result->x = p_result->y = 0;
tmp_result.x = tmp_result.y = 0;
i_prev = 0;
for( k = 0; k <= (uint32_t) i_len; k++ )
{
if( ( k == (uint32_t) i_len ) ||
( ( k > 0 ) &&
!StyleEquals( pp_char_styles[ k ], pp_char_styles[ k - 1] ) ) )
{
ft_style_t *p_style = pp_char_styles[ k - 1 ];
/* End of the current style run */
FT_Face p_face = NULL;
int i_idx = 0;
/* Look for a match amongst our attachments first */
CheckForEmbeddedFont( p_sys, &p_face, p_style );
if( ! p_face && p_sys->b_fontconfig_ok )
{
char *psz_fontfile;
vlc_mutex_lock( &p_sys->fontconfig_lock );
psz_fontfile = FontConfig_Select( p_sys->p_fontconfig,
p_style->psz_fontname,
p_style->b_bold,
p_style->b_italic,
&i_idx );
vlc_mutex_unlock( &p_sys->fontconfig_lock );
if( psz_fontfile && ! *psz_fontfile )
{
msg_Warn( p_filter, "Fontconfig was unable to find a font: \"%s\" %s"
" so using default font", p_style->psz_fontname,
((p_style->b_bold && p_style->b_italic) ? "(Bold,Italic)" :
(p_style->b_bold ? "(Bold)" :
(p_style->b_italic ? "(Italic)" : ""))) );
free( psz_fontfile );
psz_fontfile = NULL;
}
if( psz_fontfile )
{
if( FT_New_Face( p_sys->p_library,
psz_fontfile, i_idx, &p_face ) )
{
free( psz_fontfile );
free( pp_char_styles );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
free( pi_karaoke_bar );
return VLC_EGENERIC;
}
free( psz_fontfile );
}
}
if( p_face &&
FT_Select_Charmap( p_face, ft_encoding_unicode ) )
{
/* We've loaded a font face which is unhelpful for actually
* rendering text - fallback to the default one.
*/
FT_Done_Face( p_face );
p_face = NULL;
}
if( FT_Select_Charmap( p_face ? p_face : p_sys->p_face,
ft_encoding_unicode ) ||
FT_Set_Pixel_Sizes( p_face ? p_face : p_sys->p_face, 0,
p_style->i_font_size ) )
{
if( p_face ) FT_Done_Face( p_face );
free( pp_char_styles );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
free( pi_karaoke_bar );
return VLC_EGENERIC;
}
p_sys->i_use_kerning =
FT_HAS_KERNING( ( p_face ? p_face : p_sys->p_face ) );
uint32_t *psz_unicode = (uint32_t *)
malloc( (k - i_prev + 1) * sizeof( uint32_t ));
if( !psz_unicode )
{
msg_Err( p_filter, "out of memory" );
if( p_face ) FT_Done_Face( p_face );
free( pp_char_styles );
free( psz_unicode );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
free( pi_karaoke_bar );
return VLC_ENOMEM;
}
memcpy( psz_unicode, psz_text + i_prev,
sizeof( uint32_t ) * ( k - i_prev ) );
psz_unicode[ k - i_prev ] = 0;
while( *psz_unicode )
{
if( !p_line )
{
if( !(p_line = NewLine( i_len - i_prev)) )
{
msg_Err( p_filter, "out of memory" );
if( p_face ) FT_Done_Face( p_face );
free( pp_char_styles );
free( psz_unicode );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
free( pi_karaoke_bar );
return VLC_ENOMEM;
}
/* New Color mode only works in YUVA rendering mode --
* (RGB mode has palette constraints on it). We therefore
* need to populate the legacy colour fields also.
*/
p_line->b_new_color_mode = true;
p_line->i_alpha = ( p_style->i_font_color & 0xff000000 ) >> 24;
p_line->i_red = ( p_style->i_font_color & 0x00ff0000 ) >> 16;
p_line->i_green = ( p_style->i_font_color & 0x0000ff00 ) >> 8;
p_line->i_blue = ( p_style->i_font_color & 0x000000ff );
p_line->p_next = NULL;
i_pen_x = 0;
i_pen_y += tmp_result.y;
tmp_result.x = 0;
tmp_result.y = 0;
i_posn = 0;
if( p_prev ) p_prev->p_next = p_line;
else *pp_lines = p_line;
}
if( RenderTag( p_filter, p_face ? p_face : p_sys->p_face,
p_style->i_font_color, p_style->b_underline,
p_style->i_karaoke_bg_color,
p_line, psz_unicode, &i_pen_x, i_pen_y, &i_posn,
&tmp_result ) != VLC_SUCCESS )
{
if( p_face ) FT_Done_Face( p_face );
free( pp_char_styles );
free( psz_unicode );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
free( pi_karaoke_bar );
return VLC_EGENERIC;
}
if( *psz_unicode )
{
p_result->x = __MAX( p_result->x, tmp_result.x );
p_result->y += tmp_result.y;
p_prev = p_line;
p_line = NULL;
if( *psz_unicode == '\n')
{
uint32_t *c_ptr;
for( c_ptr = psz_unicode; *c_ptr; c_ptr++ )
{
*c_ptr = *(c_ptr+1);
}
}
}
}
free( psz_unicode );
if( p_face ) FT_Done_Face( p_face );
i_prev = k;
}
}
free( pp_char_styles );
#if defined(HAVE_FRIBIDI)
free( psz_text );
#endif
if( p_line )
{
p_result->x = __MAX( p_result->x, tmp_result.x );
p_result->y += tmp_result.y;
}
if( pi_karaoke_bar )
{
int i = 0;
for( p_line = *pp_lines; p_line; p_line=p_line->p_next )
{
for( k = 0; p_line->pp_glyphs[ k ]; k++, i++ )
{
if( (pi_karaoke_bar[ i ] & 0x7f) == 0x7f)
{
/* do nothing */
}
else if( (pi_karaoke_bar[ i ] & 0x7f) == 0x00)
{
/* 100% BG colour will render faster if we
* instead make it 100% FG colour, so leave
* the ratio alone and copy the value across
*/
p_line->p_fg_rgb[ k ] = p_line->p_bg_rgb[ k ];
}
else
{
if( pi_karaoke_bar[ i ] & 0x80 )
{
/* Swap Left and Right sides over for Right aligned
* language text (eg. Arabic, Hebrew)
*/
uint32_t i_tmp = p_line->p_fg_rgb[ k ];
p_line->p_fg_rgb[ k ] = p_line->p_bg_rgb[ k ];
p_line->p_bg_rgb[ k ] = i_tmp;
}
p_line->p_fg_bg_ratio[ k ] = (pi_karaoke_bar[ i ] & 0x7f);
}
}
/* Jump over the '\n' at the line-end */
i++;
}
free( pi_karaoke_bar );
}
return VLC_SUCCESS;
}
static int RenderHtml( filter_t *p_filter, subpicture_region_t *p_region_out,
subpicture_region_t *p_region_in )
{
int rv = VLC_SUCCESS;
stream_t *p_sub = NULL;
xml_t *p_xml = NULL;
xml_reader_t *p_xml_reader = NULL;
if( !p_region_in || !p_region_in->psz_html )
return VLC_EGENERIC;
/* Reset the default fontsize in case screen metrics have changed */
p_filter->p_sys->i_font_size = GetFontSize( p_filter );
p_sub = stream_MemoryNew( VLC_OBJECT(p_filter),
(uint8_t *) p_region_in->psz_html,
strlen( p_region_in->psz_html ),
true );
if( p_sub )
{
p_xml = xml_Create( p_filter );
if( p_xml )
{
bool b_karaoke = false;
p_xml_reader = xml_ReaderCreate( p_xml, p_sub );
if( p_xml_reader )
{
/* Look for Root Node */
if( xml_ReaderRead( p_xml_reader ) == 1 )
{
char *psz_node = xml_ReaderName( p_xml_reader );
if( !strcasecmp( "karaoke", psz_node ) )
{
/* We're going to have to render the text a number
* of times to show the progress marker on the text.
*/
var_SetBool( p_filter, "text-rerender", true );
b_karaoke = true;
}
else if( !strcasecmp( "text", psz_node ) )
{
b_karaoke = false;
}
else
{
/* Only text and karaoke tags are supported */
msg_Dbg( p_filter, "Unsupported top-level tag '%s' ignored.", psz_node );
xml_ReaderDelete( p_xml, p_xml_reader );
p_xml_reader = NULL;
rv = VLC_EGENERIC;
}
free( psz_node );
}
}
if( p_xml_reader )
{
uint32_t *psz_text;
int i_len = 0;
uint32_t i_runs = 0;
uint32_t i_k_runs = 0;
uint32_t *pi_run_lengths = NULL;
uint32_t *pi_k_run_lengths = NULL;
uint32_t *pi_k_durations = NULL;
ft_style_t **pp_styles = NULL;
FT_Vector result;
line_desc_t *p_lines = NULL;
psz_text = (uint32_t *)malloc( strlen( p_region_in->psz_html ) *
sizeof( uint32_t ) );
if( psz_text )
{
uint32_t k;
rv = ProcessNodes( p_filter, p_xml_reader,
p_region_in->p_style, psz_text, &i_len,
&i_runs, &pi_run_lengths, &pp_styles,
b_karaoke, &i_k_runs, &pi_k_run_lengths,
&pi_k_durations );
p_region_out->i_x = p_region_in->i_x;
p_region_out->i_y = p_region_in->i_y;
if(( rv == VLC_SUCCESS ) && ( i_len > 0 ))
{
rv = ProcessLines( p_filter, psz_text, i_len, i_runs,
pi_run_lengths, pp_styles, &p_lines, &result,
b_karaoke, i_k_runs, pi_k_run_lengths,
pi_k_durations );
}
for( k=0; k<i_runs; k++)
DeleteStyle( pp_styles[k] );
free( pp_styles );
free( pi_run_lengths );
free( psz_text );
/* Don't attempt to render text that couldn't be layed out
* properly.
*/
if(( rv == VLC_SUCCESS ) && ( i_len > 0 ))
{
if( config_GetInt( p_filter, "freetype-yuvp" ) )
{
Render( p_filter, p_region_out, p_lines,
result.x, result.y );
}
else
{
RenderYUVA( p_filter, p_region_out, p_lines,
result.x, result.y );
}
}
}
FreeLines( p_lines );
xml_ReaderDelete( p_xml, p_xml_reader );
}
xml_Delete( p_xml );
}
stream_Delete( p_sub );
}
return rv;
}
static char* FontConfig_Select( FcConfig* priv, const char* family,
bool b_bold, bool b_italic, int *i_idx )
{
FcResult result;
FcPattern *pat, *p_pat;
FcChar8* val_s;
FcBool val_b;
pat = FcPatternCreate();
if (!pat) return NULL;
FcPatternAddString( pat, FC_FAMILY, (const FcChar8*)family );
FcPatternAddBool( pat, FC_OUTLINE, FcTrue );
FcPatternAddInteger( pat, FC_SLANT, b_italic ? 1000 : 0 );
FcPatternAddInteger( pat, FC_WEIGHT, b_bold ? 1000 : 0 );
FcDefaultSubstitute( pat );
if( !FcConfigSubstitute( priv, pat, FcMatchPattern ) )
{
FcPatternDestroy( pat );
return NULL;
}
p_pat = FcFontMatch( priv, pat, &result );
FcPatternDestroy( pat );
if( !p_pat ) return NULL;
if( ( FcResultMatch != FcPatternGetBool( p_pat, FC_OUTLINE, 0, &val_b ) )
|| ( val_b != FcTrue ) )
{
FcPatternDestroy( p_pat );
return NULL;
}
if( FcResultMatch != FcPatternGetInteger( p_pat, FC_INDEX, 0, i_idx ) )
{
*i_idx = 0;
}
if( FcResultMatch != FcPatternGetString( p_pat, FC_FAMILY, 0, &val_s ) )
{
FcPatternDestroy( p_pat );
return NULL;
}
/*
if( strcasecmp((const char*)val_s, family ) != 0 )
msg_Warn( p_filter, "fontconfig: selected font family is not"
"the requested one: '%s' != '%s'\n",
(const char*)val_s, family );
*/
if( FcResultMatch != FcPatternGetString( p_pat, FC_FILE, 0, &val_s ) )
{
FcPatternDestroy( p_pat );
return NULL;
}
FcPatternDestroy( p_pat );
return strdup( (const char*)val_s );
}
#endif
static void FreeLine( line_desc_t *p_line )
{
unsigned int i;
for( i = 0; p_line->pp_glyphs[ i ] != NULL; i++ )
{
FT_Done_Glyph( (FT_Glyph)p_line->pp_glyphs[ i ] );
}
free( p_line->pp_glyphs );
free( p_line->p_glyph_pos );
free( p_line->p_fg_rgb );
free( p_line->p_bg_rgb );
free( p_line->p_fg_bg_ratio );
free( p_line->pi_underline_offset );
free( p_line->pi_underline_thickness );
free( p_line );
}
static void FreeLines( line_desc_t *p_lines )
{
line_desc_t *p_line, *p_next;
if( !p_lines ) return;
for( p_line = p_lines; p_line != NULL; p_line = p_next )
{
p_next = p_line->p_next;
FreeLine( p_line );
}
}
static line_desc_t *NewLine( int i_count )
{
line_desc_t *p_line = malloc( sizeof(line_desc_t) );
if( !p_line ) return NULL;
p_line->i_height = 0;
p_line->i_width = 0;
p_line->p_next = NULL;
p_line->pp_glyphs = malloc( sizeof(FT_BitmapGlyph) * ( i_count + 1 ) );
p_line->p_glyph_pos = malloc( sizeof( FT_Vector ) * ( i_count + 1 ) );
p_line->p_fg_rgb = malloc( sizeof( uint32_t ) * ( i_count + 1 ) );
p_line->p_bg_rgb = malloc( sizeof( uint32_t ) * ( i_count + 1 ) );
p_line->p_fg_bg_ratio = calloc( i_count + 1, sizeof( uint8_t ) );
p_line->pi_underline_offset = calloc( i_count + 1, sizeof( uint16_t ) );
p_line->pi_underline_thickness = calloc( i_count + 1, sizeof( uint16_t ) );
if( ( p_line->pp_glyphs == NULL ) ||
( p_line->p_glyph_pos == NULL ) ||
( p_line->p_fg_rgb == NULL ) ||
( p_line->p_bg_rgb == NULL ) ||
( p_line->p_fg_bg_ratio == NULL ) ||
( p_line->pi_underline_offset == NULL ) ||
( p_line->pi_underline_thickness == NULL ) )
{
free( p_line->pi_underline_thickness );
free( p_line->pi_underline_offset );
free( p_line->p_fg_rgb );
free( p_line->p_bg_rgb );
free( p_line->p_fg_bg_ratio );
free( p_line->p_glyph_pos );
free( p_line->pp_glyphs );
free( p_line );
return NULL;
}
p_line->pp_glyphs[0] = NULL;
p_line->b_new_color_mode = false;
return p_line;
}
static int GetFontSize( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
vlc_value_t val;
int i_size = 0;
if( p_sys->i_default_font_size )
{
if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
i_size = p_sys->i_default_font_size * val.i_int / 1000;
else
i_size = p_sys->i_default_font_size;
}
else
{
var_Get( p_filter, "freetype-rel-fontsize", &val );
i_size = (int)p_filter->fmt_out.video.i_height / val.i_int;
p_filter->p_sys->i_display_height =
p_filter->fmt_out.video.i_height;
}
if( i_size <= 0 )
{
msg_Warn( p_filter, "invalid fontsize, using 12" );
if( VLC_SUCCESS == var_Get( p_filter, "scale", &val ))
i_size = 12 * val.i_int / 1000;
else
i_size = 12;
}
return i_size;
}
static int SetFontSize( filter_t *p_filter, int i_size )
{
filter_sys_t *p_sys = p_filter->p_sys;
if( !i_size )
{
i_size = GetFontSize( p_filter );
msg_Dbg( p_filter, "using fontsize: %i", i_size );
}
p_sys->i_font_size = i_size;
if( FT_Set_Pixel_Sizes( p_sys->p_face, 0, i_size ) )
{
msg_Err( p_filter, "couldn't set font size to %d", i_size );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static void YUVFromRGB( uint32_t i_argb,
uint8_t *pi_y, uint8_t *pi_u, uint8_t *pi_v )
{
int i_red = ( i_argb & 0x00ff0000 ) >> 16;
int i_green = ( i_argb & 0x0000ff00 ) >> 8;
int i_blue = ( i_argb & 0x000000ff );
*pi_y = (uint8_t)__MIN(abs( 2104 * i_red + 4130 * i_green +
802 * i_blue + 4096 + 131072 ) >> 13, 235);
*pi_u = (uint8_t)__MIN(abs( -1214 * i_red + -2384 * i_green +
3598 * i_blue + 4096 + 1048576) >> 13, 240);
*pi_v = (uint8_t)__MIN(abs( 3598 * i_red + -3013 * i_green +
-585 * i_blue + 4096 + 1048576) >> 13, 240);
}
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