2614 lines
75 KiB
C
2614 lines
75 KiB
C
// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
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// vim:ts=8:sw=8:noet:ai:
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/*
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* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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*
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* This file is part of libass.
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*
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* libass is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* libass is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with libass; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <assert.h>
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#include <math.h>
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#include <inttypes.h>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_STROKER_H
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#include FT_GLYPH_H
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#include FT_SYNTHESIS_H
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#include "mputils.h"
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#include "ass.h"
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#include "ass_font.h"
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#include "ass_bitmap.h"
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#include "ass_cache.h"
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#include "ass_utils.h"
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#include "ass_fontconfig.h"
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#include "ass_library.h"
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#define MAX_GLYPHS 3000
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#define MAX_LINES 300
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#define BLUR_MAX_RADIUS 50.0
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#define MAX_BE 100
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#define ROUND(x) ((int) ((x) + .5))
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#define SUBPIXEL_MASK 56 // d6 bitmask for subpixel accuracy adjustment
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static int last_render_id = 0;
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typedef struct ass_settings_s {
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int frame_width;
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int frame_height;
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double font_size_coeff; // font size multiplier
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double line_spacing; // additional line spacing (in frame pixels)
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int top_margin; // height of top margin. Everything except toptitles is shifted down by top_margin.
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int bottom_margin; // height of bottom margin. (frame_height - top_margin - bottom_margin) is original video height.
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int left_margin;
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int right_margin;
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int use_margins; // 0 - place all subtitles inside original frame
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// 1 - use margins for placing toptitles and subtitles
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double aspect; // frame aspect ratio, d_width / d_height.
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ass_hinting_t hinting;
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char* default_font;
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char* default_family;
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} ass_settings_t;
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// a rendered event
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typedef struct event_images_s {
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ass_image_t* imgs;
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int top, height;
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int detect_collisions;
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int shift_direction;
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ass_event_t* event;
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} event_images_t;
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struct ass_renderer_s {
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ass_library_t* library;
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FT_Library ftlibrary;
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fc_instance_t* fontconfig_priv;
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ass_settings_t settings;
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int render_id;
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ass_synth_priv_t* synth_priv;
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ass_image_t* images_root; // rendering result is stored here
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ass_image_t* prev_images_root;
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event_images_t* eimg; // temporary buffer for sorting rendered events
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int eimg_size; // allocated buffer size
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};
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typedef enum {EF_NONE = 0, EF_KARAOKE, EF_KARAOKE_KF, EF_KARAOKE_KO} effect_t;
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// describes a glyph
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// glyph_info_t and text_info_t are used for text centering and word-wrapping operations
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typedef struct glyph_info_s {
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unsigned symbol;
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FT_Glyph glyph;
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FT_Glyph outline_glyph;
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bitmap_t* bm; // glyph bitmap
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bitmap_t* bm_o; // outline bitmap
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bitmap_t* bm_s; // shadow bitmap
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FT_BBox bbox;
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FT_Vector pos;
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char linebreak; // the first (leading) glyph of some line ?
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uint32_t c[4]; // colors
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FT_Vector advance; // 26.6
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effect_t effect_type;
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int effect_timing; // time duration of current karaoke word
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// after process_karaoke_effects: distance in pixels from the glyph origin.
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// part of the glyph to the left of it is displayed in a different color.
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int effect_skip_timing; // delay after the end of last karaoke word
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int asc, desc; // font max ascender and descender
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// int height;
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int be; // blur edges
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double blur; // gaussian blur
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double shadow;
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double frx, fry, frz; // rotation
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bitmap_hash_key_t hash_key;
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} glyph_info_t;
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typedef struct line_info_s {
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int asc, desc;
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} line_info_t;
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typedef struct text_info_s {
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glyph_info_t* glyphs;
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int length;
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line_info_t lines[MAX_LINES];
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int n_lines;
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int height;
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} text_info_t;
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// Renderer state.
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// Values like current font face, color, screen position, clipping and so on are stored here.
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typedef struct render_context_s {
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ass_event_t* event;
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ass_style_t* style;
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ass_font_t* font;
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char* font_path;
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double font_size;
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FT_Stroker stroker;
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int alignment; // alignment overrides go here; if zero, style value will be used
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double frx, fry, frz;
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enum { EVENT_NORMAL, // "normal" top-, sub- or mid- title
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EVENT_POSITIONED, // happens after pos(,), margins are ignored
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EVENT_HSCROLL, // "Banner" transition effect, text_width is unlimited
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EVENT_VSCROLL // "Scroll up", "Scroll down" transition effects
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} evt_type;
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double pos_x, pos_y; // position
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double org_x, org_y; // origin
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char have_origin; // origin is explicitly defined; if 0, get_base_point() is used
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double scale_x, scale_y;
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double hspacing; // distance between letters, in pixels
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double border; // outline width
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uint32_t c[4]; // colors(Primary, Secondary, so on) in RGBA
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int clip_x0, clip_y0, clip_x1, clip_y1;
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char detect_collisions;
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uint32_t fade; // alpha from \fad
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char be; // blur edges
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double blur; // gaussian blur
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double shadow;
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int drawing_mode; // not implemented; when != 0 text is discarded, except for style override tags
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effect_t effect_type;
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int effect_timing;
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int effect_skip_timing;
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enum { SCROLL_LR, // left-to-right
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SCROLL_RL,
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SCROLL_TB, // top-to-bottom
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SCROLL_BT
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} scroll_direction; // for EVENT_HSCROLL, EVENT_VSCROLL
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int scroll_shift;
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// face properties
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char* family;
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unsigned bold;
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unsigned italic;
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int treat_family_as_pattern;
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} render_context_t;
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// frame-global data
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typedef struct frame_context_s {
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ass_renderer_t* ass_priv;
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int width, height; // screen dimensions
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int orig_height; // frame height ( = screen height - margins )
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int orig_width; // frame width ( = screen width - margins )
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int orig_height_nocrop; // frame height ( = screen height - margins + cropheight)
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int orig_width_nocrop; // frame width ( = screen width - margins + cropwidth)
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ass_track_t* track;
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long long time; // frame's timestamp, ms
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double font_scale;
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double font_scale_x; // x scale applied to all glyphs to preserve text aspect ratio
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double border_scale;
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} frame_context_t;
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static ass_renderer_t* ass_renderer;
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static ass_settings_t* global_settings;
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static text_info_t text_info;
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static render_context_t render_context;
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static frame_context_t frame_context;
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struct render_priv_s {
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int top, height;
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int render_id;
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};
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static void ass_lazy_track_init(void)
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{
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ass_track_t* track = frame_context.track;
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if (track->PlayResX && track->PlayResY)
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return;
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if (!track->PlayResX && !track->PlayResY) {
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NeitherPlayResXNorPlayResYDefined);
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track->PlayResX = 384;
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track->PlayResY = 288;
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} else {
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double orig_aspect = (global_settings->aspect * frame_context.height * frame_context.orig_width) /
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frame_context.orig_height / frame_context.width;
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if (!track->PlayResY && track->PlayResX == 1280) {
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track->PlayResY = 1024;
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_PlayResYUndefinedSettingY, track->PlayResY);
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} else if (!track->PlayResY) {
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track->PlayResY = track->PlayResX / orig_aspect + .5;
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_PlayResYUndefinedSettingY, track->PlayResY);
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} else if (!track->PlayResX && track->PlayResY == 1024) {
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track->PlayResX = 1280;
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_PlayResXUndefinedSettingX, track->PlayResX);
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} else if (!track->PlayResX) {
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track->PlayResX = track->PlayResY * orig_aspect + .5;
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_PlayResXUndefinedSettingX, track->PlayResX);
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}
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}
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}
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ass_renderer_t* ass_renderer_init(ass_library_t* library)
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{
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int error;
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FT_Library ft;
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ass_renderer_t* priv = 0;
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int vmajor, vminor, vpatch;
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memset(&render_context, 0, sizeof(render_context));
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memset(&frame_context, 0, sizeof(frame_context));
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memset(&text_info, 0, sizeof(text_info));
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error = FT_Init_FreeType( &ft );
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if ( error ) {
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mp_msg(MSGT_ASS, MSGL_FATAL, MSGTR_LIBASS_FT_Init_FreeTypeFailed);
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goto ass_init_exit;
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}
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FT_Library_Version(ft, &vmajor, &vminor, &vpatch);
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mp_msg(MSGT_ASS, MSGL_V, "FreeType library version: %d.%d.%d\n",
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vmajor, vminor, vpatch);
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mp_msg(MSGT_ASS, MSGL_V, "FreeType headers version: %d.%d.%d\n",
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FREETYPE_MAJOR, FREETYPE_MINOR, FREETYPE_PATCH);
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priv = calloc(1, sizeof(ass_renderer_t));
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if (!priv) {
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FT_Done_FreeType(ft);
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goto ass_init_exit;
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}
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priv->synth_priv = ass_synth_init(BLUR_MAX_RADIUS);
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priv->library = library;
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priv->ftlibrary = ft;
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// images_root and related stuff is zero-filled in calloc
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ass_font_cache_init();
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ass_bitmap_cache_init();
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ass_composite_cache_init();
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ass_glyph_cache_init();
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text_info.glyphs = calloc(MAX_GLYPHS, sizeof(glyph_info_t));
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ass_init_exit:
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if (priv) mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_Init);
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else mp_msg(MSGT_ASS, MSGL_ERR, MSGTR_LIBASS_InitFailed);
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return priv;
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}
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void ass_renderer_done(ass_renderer_t* priv)
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{
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ass_font_cache_done();
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ass_bitmap_cache_done();
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ass_composite_cache_done();
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ass_glyph_cache_done();
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if (render_context.stroker) {
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FT_Stroker_Done(render_context.stroker);
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render_context.stroker = 0;
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}
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if (priv && priv->ftlibrary) FT_Done_FreeType(priv->ftlibrary);
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if (priv && priv->fontconfig_priv) fontconfig_done(priv->fontconfig_priv);
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if (priv && priv->synth_priv) ass_synth_done(priv->synth_priv);
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if (priv && priv->eimg) free(priv->eimg);
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if (priv) free(priv);
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if (text_info.glyphs) free(text_info.glyphs);
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}
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/**
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* \brief Create a new ass_image_t
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* Parameters are the same as ass_image_t fields.
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*/
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static ass_image_t* my_draw_bitmap(unsigned char* bitmap, int bitmap_w, int bitmap_h, int stride, int dst_x, int dst_y, uint32_t color)
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{
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ass_image_t* img = calloc(1, sizeof(ass_image_t));
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img->w = bitmap_w;
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img->h = bitmap_h;
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img->stride = stride;
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img->bitmap = bitmap;
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img->color = color;
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img->dst_x = dst_x;
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img->dst_y = dst_y;
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return img;
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}
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/**
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* \brief convert bitmap glyph into ass_image_t struct(s)
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* \param bit freetype bitmap glyph, FT_PIXEL_MODE_GRAY
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* \param dst_x bitmap x coordinate in video frame
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* \param dst_y bitmap y coordinate in video frame
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* \param color first color, RGBA
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* \param color2 second color, RGBA
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* \param brk x coordinate relative to glyph origin, color is used to the left of brk, color2 - to the right
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* \param tail pointer to the last image's next field, head of the generated list should be stored here
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* \return pointer to the new list tail
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* Performs clipping. Uses my_draw_bitmap for actual bitmap convertion.
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*/
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static ass_image_t** render_glyph(bitmap_t* bm, int dst_x, int dst_y, uint32_t color, uint32_t color2, int brk, ass_image_t** tail)
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{
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// brk is relative to dst_x
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// color = color left of brk
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// color2 = color right of brk
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int b_x0, b_y0, b_x1, b_y1; // visible part of the bitmap
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int clip_x0, clip_y0, clip_x1, clip_y1;
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int tmp;
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ass_image_t* img;
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dst_x += bm->left;
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dst_y += bm->top;
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brk -= bm->left;
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// clipping
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clip_x0 = render_context.clip_x0;
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clip_y0 = render_context.clip_y0;
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clip_x1 = render_context.clip_x1;
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clip_y1 = render_context.clip_y1;
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b_x0 = 0;
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b_y0 = 0;
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b_x1 = bm->w;
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b_y1 = bm->h;
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tmp = dst_x - clip_x0;
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if (tmp < 0) {
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mp_msg(MSGT_ASS, MSGL_DBG2, "clip left\n");
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b_x0 = - tmp;
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}
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tmp = dst_y - clip_y0;
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if (tmp < 0) {
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mp_msg(MSGT_ASS, MSGL_DBG2, "clip top\n");
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b_y0 = - tmp;
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}
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tmp = clip_x1 - dst_x - bm->w;
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if (tmp < 0) {
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mp_msg(MSGT_ASS, MSGL_DBG2, "clip right\n");
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b_x1 = bm->w + tmp;
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}
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tmp = clip_y1 - dst_y - bm->h;
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if (tmp < 0) {
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mp_msg(MSGT_ASS, MSGL_DBG2, "clip bottom\n");
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b_y1 = bm->h + tmp;
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}
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if ((b_y0 >= b_y1) || (b_x0 >= b_x1))
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return tail;
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if (brk > b_x0) { // draw left part
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if (brk > b_x1) brk = b_x1;
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img = my_draw_bitmap(bm->buffer + bm->w * b_y0 + b_x0,
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brk - b_x0, b_y1 - b_y0, bm->w,
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dst_x + b_x0, dst_y + b_y0, color);
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*tail = img;
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tail = &img->next;
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}
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if (brk < b_x1) { // draw right part
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if (brk < b_x0) brk = b_x0;
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img = my_draw_bitmap(bm->buffer + bm->w * b_y0 + brk,
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b_x1 - brk, b_y1 - b_y0, bm->w,
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dst_x + brk, dst_y + b_y0, color2);
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*tail = img;
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tail = &img->next;
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}
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return tail;
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}
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/**
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* \brief Calculate overlapping area of two consecutive bitmaps and in case they
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* overlap, composite them together
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* Mainly useful for translucent glyphs and especially borders, to avoid the
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* luminance adding up where they overlap (which looks ugly)
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*/
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static void render_overlap(ass_image_t** last_tail, ass_image_t** tail, bitmap_hash_key_t *last_hash, bitmap_hash_key_t* hash) {
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int left, top, bottom, right;
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int old_left, old_top, w, h, cur_left, cur_top;
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int x, y, opos, cpos;
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char m;
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composite_hash_key_t hk;
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composite_hash_val_t *hv;
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composite_hash_key_t *nhk;
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int ax = (*last_tail)->dst_x;
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int ay = (*last_tail)->dst_y;
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int aw = (*last_tail)->w;
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int as = (*last_tail)->stride;
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int ah = (*last_tail)->h;
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int bx = (*tail)->dst_x;
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int by = (*tail)->dst_y;
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int bw = (*tail)->w;
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int bs = (*tail)->stride;
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int bh = (*tail)->h;
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unsigned char* a;
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unsigned char* b;
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if ((*last_tail)->bitmap == (*tail)->bitmap)
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return;
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if ((*last_tail)->color != (*tail)->color)
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return;
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// Calculate overlap coordinates
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left = (ax > bx) ? ax : bx;
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top = (ay > by) ? ay : by;
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right = ((ax+aw) < (bx+bw)) ? (ax+aw) : (bx+bw);
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bottom = ((ay+ah) < (by+bh)) ? (ay+ah) : (by+bh);
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if ((right <= left) || (bottom <= top))
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return;
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old_left = left-ax;
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old_top = top-ay;
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w = right-left;
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h = bottom-top;
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cur_left = left-bx;
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cur_top = top-by;
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// Query cache
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memset(&hk, 0, sizeof(hk));
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memcpy(&hk.a, last_hash, sizeof(*last_hash));
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memcpy(&hk.b, hash, sizeof(*hash));
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hk.aw = aw;
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hk.ah = ah;
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hk.bw = bw;
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hk.bh = bh;
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hk.ax = ax;
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hk.ay = ay;
|
|
hk.bx = bx;
|
|
hk.by = by;
|
|
hv = cache_find_composite(&hk);
|
|
if (hv) {
|
|
(*last_tail)->bitmap = hv->a;
|
|
(*tail)->bitmap = hv->b;
|
|
return;
|
|
}
|
|
|
|
// Allocate new bitmaps and copy over data
|
|
a = (*last_tail)->bitmap;
|
|
b = (*tail)->bitmap;
|
|
(*last_tail)->bitmap = malloc(as*ah);
|
|
(*tail)->bitmap = malloc(bs*bh);
|
|
memcpy((*last_tail)->bitmap, a, as*ah);
|
|
memcpy((*tail)->bitmap, b, bs*bh);
|
|
|
|
// Composite overlapping area
|
|
for (y=0; y<h; y++)
|
|
for (x=0; x<w; x++) {
|
|
opos = (old_top+y)*(as) + (old_left+x);
|
|
cpos = (cur_top+y)*(bs) + (cur_left+x);
|
|
m = (a[opos] > b[cpos]) ? a[opos] : b[cpos];
|
|
(*last_tail)->bitmap[opos] = 0;
|
|
(*tail)->bitmap[cpos] = m;
|
|
}
|
|
|
|
// Insert bitmaps into the cache
|
|
nhk = calloc(1, sizeof(*nhk));
|
|
memcpy(nhk, &hk, sizeof(*nhk));
|
|
hv = calloc(1, sizeof(*hv));
|
|
hv->a = (*last_tail)->bitmap;
|
|
hv->b = (*tail)->bitmap;
|
|
cache_add_composite(nhk, hv);
|
|
}
|
|
|
|
/**
|
|
* \brief Convert text_info_t struct to ass_image_t list
|
|
* Splits glyphs in halves when needed (for \kf karaoke).
|
|
*/
|
|
static ass_image_t* render_text(text_info_t* text_info, int dst_x, int dst_y)
|
|
{
|
|
int pen_x, pen_y;
|
|
int i;
|
|
bitmap_t* bm;
|
|
ass_image_t* head;
|
|
ass_image_t** tail = &head;
|
|
ass_image_t** last_tail = 0;
|
|
ass_image_t** here_tail = 0;
|
|
bitmap_hash_key_t* last_hash = 0;
|
|
|
|
for (i = 0; i < text_info->length; ++i) {
|
|
glyph_info_t* info = text_info->glyphs + i;
|
|
if ((info->symbol == 0) || (info->symbol == '\n') || !info->bm_s || (info->shadow == 0))
|
|
continue;
|
|
|
|
pen_x = dst_x + info->pos.x + ROUND(info->shadow * frame_context.border_scale);
|
|
pen_y = dst_y + info->pos.y + ROUND(info->shadow * frame_context.border_scale);
|
|
bm = info->bm_s;
|
|
|
|
here_tail = tail;
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[3], 0, 1000000, tail);
|
|
if (last_tail && tail != here_tail && ((info->c[3] & 0xff) > 0))
|
|
render_overlap(last_tail, here_tail, last_hash, &info->hash_key);
|
|
last_tail = here_tail;
|
|
last_hash = &info->hash_key;
|
|
}
|
|
|
|
last_tail = 0;
|
|
for (i = 0; i < text_info->length; ++i) {
|
|
glyph_info_t* info = text_info->glyphs + i;
|
|
if ((info->symbol == 0) || (info->symbol == '\n') || !info->bm_o)
|
|
continue;
|
|
|
|
pen_x = dst_x + info->pos.x;
|
|
pen_y = dst_y + info->pos.y;
|
|
bm = info->bm_o;
|
|
|
|
if ((info->effect_type == EF_KARAOKE_KO) && (info->effect_timing <= info->bbox.xMax)) {
|
|
// do nothing
|
|
} else {
|
|
here_tail = tail;
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[2], 0, 1000000, tail);
|
|
if (last_tail && tail != here_tail && ((info->c[2] & 0xff) > 0))
|
|
render_overlap(last_tail, here_tail, last_hash, &info->hash_key);
|
|
last_tail = here_tail;
|
|
last_hash = &info->hash_key;
|
|
}
|
|
}
|
|
for (i = 0; i < text_info->length; ++i) {
|
|
glyph_info_t* info = text_info->glyphs + i;
|
|
if ((info->symbol == 0) || (info->symbol == '\n') || !info->bm)
|
|
continue;
|
|
|
|
pen_x = dst_x + info->pos.x;
|
|
pen_y = dst_y + info->pos.y;
|
|
bm = info->bm;
|
|
|
|
if ((info->effect_type == EF_KARAOKE) || (info->effect_type == EF_KARAOKE_KO)) {
|
|
if (info->effect_timing > info->bbox.xMax)
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[0], 0, 1000000, tail);
|
|
else
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[1], 0, 1000000, tail);
|
|
} else if (info->effect_type == EF_KARAOKE_KF) {
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[0], info->c[1], info->effect_timing, tail);
|
|
} else
|
|
tail = render_glyph(bm, pen_x, pen_y, info->c[0], 0, 1000000, tail);
|
|
}
|
|
|
|
*tail = 0;
|
|
return head;
|
|
}
|
|
|
|
/**
|
|
* \brief Mapping between script and screen coordinates
|
|
*/
|
|
static int x2scr(double x) {
|
|
return x*frame_context.orig_width_nocrop / frame_context.track->PlayResX +
|
|
FFMAX(global_settings->left_margin, 0);
|
|
}
|
|
static double x2scr_pos(double x) {
|
|
return x*frame_context.orig_width / frame_context.track->PlayResX +
|
|
global_settings->left_margin;
|
|
}
|
|
/**
|
|
* \brief Mapping between script and screen coordinates
|
|
*/
|
|
static double y2scr(double y) {
|
|
return y * frame_context.orig_height_nocrop / frame_context.track->PlayResY +
|
|
FFMAX(global_settings->top_margin, 0);
|
|
}
|
|
static double y2scr_pos(double y) {
|
|
return y * frame_context.orig_height / frame_context.track->PlayResY +
|
|
global_settings->top_margin;
|
|
}
|
|
|
|
// the same for toptitles
|
|
static int y2scr_top(double y) {
|
|
if (global_settings->use_margins)
|
|
return y * frame_context.orig_height_nocrop / frame_context.track->PlayResY;
|
|
else
|
|
return y * frame_context.orig_height_nocrop / frame_context.track->PlayResY +
|
|
FFMAX(global_settings->top_margin, 0);
|
|
}
|
|
// the same for subtitles
|
|
static int y2scr_sub(double y) {
|
|
if (global_settings->use_margins)
|
|
return y * frame_context.orig_height_nocrop / frame_context.track->PlayResY +
|
|
FFMAX(global_settings->top_margin, 0) +
|
|
FFMAX(global_settings->bottom_margin, 0);
|
|
else
|
|
return y * frame_context.orig_height_nocrop / frame_context.track->PlayResY +
|
|
FFMAX(global_settings->top_margin, 0);
|
|
}
|
|
|
|
static void compute_string_bbox( text_info_t* info, FT_BBox *abbox ) {
|
|
FT_BBox bbox;
|
|
int i;
|
|
|
|
if (text_info.length > 0) {
|
|
bbox.xMin = 32000;
|
|
bbox.xMax = -32000;
|
|
bbox.yMin = - d6_to_int(text_info.lines[0].asc) + text_info.glyphs[0].pos.y;
|
|
bbox.yMax = d6_to_int(text_info.height - text_info.lines[0].asc) + text_info.glyphs[0].pos.y;
|
|
|
|
for (i = 0; i < text_info.length; ++i) {
|
|
int s = text_info.glyphs[i].pos.x;
|
|
int e = s + d6_to_int(text_info.glyphs[i].advance.x);
|
|
bbox.xMin = FFMIN(bbox.xMin, s);
|
|
bbox.xMax = FFMAX(bbox.xMax, e);
|
|
}
|
|
} else
|
|
bbox.xMin = bbox.xMax = bbox.yMin = bbox.yMax = 0;
|
|
|
|
/* return string bbox */
|
|
*abbox = bbox;
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief Check if starting part of (*p) matches sample. If true, shift p to the first symbol after the matching part.
|
|
*/
|
|
static inline int mystrcmp(char** p, const char* sample) {
|
|
int len = strlen(sample);
|
|
if (strncmp(*p, sample, len) == 0) {
|
|
(*p) += len;
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
static void change_font_size(double sz)
|
|
{
|
|
double size = sz * frame_context.font_scale;
|
|
|
|
if (size < 1)
|
|
size = 1;
|
|
else if (size > frame_context.height * 2)
|
|
size = frame_context.height * 2;
|
|
|
|
ass_font_set_size(render_context.font, size);
|
|
|
|
render_context.font_size = sz;
|
|
}
|
|
|
|
/**
|
|
* \brief Change current font, using setting from render_context.
|
|
*/
|
|
static void update_font(void)
|
|
{
|
|
unsigned val;
|
|
ass_renderer_t* priv = frame_context.ass_priv;
|
|
ass_font_desc_t desc;
|
|
desc.family = strdup(render_context.family);
|
|
desc.treat_family_as_pattern = render_context.treat_family_as_pattern;
|
|
|
|
val = render_context.bold;
|
|
// 0 = normal, 1 = bold, >1 = exact weight
|
|
if (val == 0) val = 80; // normal
|
|
else if (val == 1) val = 200; // bold
|
|
desc.bold = val;
|
|
|
|
val = render_context.italic;
|
|
if (val == 0) val = 0; // normal
|
|
else if (val == 1) val = 110; //italic
|
|
desc.italic = val;
|
|
|
|
render_context.font = ass_font_new(priv->library, priv->ftlibrary, priv->fontconfig_priv, &desc);
|
|
free(desc.family);
|
|
|
|
if (render_context.font)
|
|
change_font_size(render_context.font_size);
|
|
}
|
|
|
|
/**
|
|
* \brief Change border width
|
|
* negative value resets border to style value
|
|
*/
|
|
static void change_border(double border)
|
|
{
|
|
int b;
|
|
if (!render_context.font) return;
|
|
|
|
if (border < 0) {
|
|
if (render_context.style->BorderStyle == 1)
|
|
border = render_context.style->Outline;
|
|
else
|
|
border = 1.;
|
|
}
|
|
render_context.border = border;
|
|
|
|
b = 64 * border * frame_context.border_scale;
|
|
if (b > 0) {
|
|
if (!render_context.stroker) {
|
|
int error;
|
|
#if (FREETYPE_MAJOR > 2) || ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR > 1))
|
|
error = FT_Stroker_New( ass_renderer->ftlibrary, &render_context.stroker );
|
|
#else // < 2.2
|
|
error = FT_Stroker_New( render_context.font->faces[0]->memory, &render_context.stroker );
|
|
#endif
|
|
if (error) {
|
|
mp_msg(MSGT_ASS, MSGL_V, "failed to get stroker\n");
|
|
render_context.stroker = 0;
|
|
}
|
|
}
|
|
if (render_context.stroker)
|
|
FT_Stroker_Set( render_context.stroker, b,
|
|
FT_STROKER_LINECAP_ROUND,
|
|
FT_STROKER_LINEJOIN_ROUND,
|
|
0 );
|
|
} else {
|
|
FT_Stroker_Done(render_context.stroker);
|
|
render_context.stroker = 0;
|
|
}
|
|
}
|
|
|
|
#define _r(c) ((c)>>24)
|
|
#define _g(c) (((c)>>16)&0xFF)
|
|
#define _b(c) (((c)>>8)&0xFF)
|
|
#define _a(c) ((c)&0xFF)
|
|
|
|
/**
|
|
* \brief Calculate a weighted average of two colors
|
|
* calculates c1*(1-a) + c2*a, but separately for each component except alpha
|
|
*/
|
|
static void change_color(uint32_t* var, uint32_t new, double pwr)
|
|
{
|
|
(*var)= ((uint32_t)(_r(*var) * (1 - pwr) + _r(new) * pwr) << 24) +
|
|
((uint32_t)(_g(*var) * (1 - pwr) + _g(new) * pwr) << 16) +
|
|
((uint32_t)(_b(*var) * (1 - pwr) + _b(new) * pwr) << 8) +
|
|
_a(*var);
|
|
}
|
|
|
|
// like change_color, but for alpha component only
|
|
static void change_alpha(uint32_t* var, uint32_t new, double pwr)
|
|
{
|
|
*var = (_r(*var) << 24) + (_g(*var) << 16) + (_b(*var) << 8) + (_a(*var) * (1 - pwr) + _a(new) * pwr);
|
|
}
|
|
|
|
/**
|
|
* \brief Multiply two alpha values
|
|
* \param a first value
|
|
* \param b second value
|
|
* \return result of multiplication
|
|
* Parameters and result are limited by 0xFF.
|
|
*/
|
|
static uint32_t mult_alpha(uint32_t a, uint32_t b)
|
|
{
|
|
return 0xFF - (0xFF - a) * (0xFF - b) / 0xFF;
|
|
}
|
|
|
|
/**
|
|
* \brief Calculate alpha value by piecewise linear function
|
|
* Used for \fad, \fade implementation.
|
|
*/
|
|
static unsigned interpolate_alpha(long long now,
|
|
long long t1, long long t2, long long t3, long long t4,
|
|
unsigned a1, unsigned a2, unsigned a3)
|
|
{
|
|
unsigned a;
|
|
double cf;
|
|
if (now <= t1) {
|
|
a = a1;
|
|
} else if (now >= t4) {
|
|
a = a3;
|
|
} else if (now < t2) { // and > t1
|
|
cf = ((double)(now - t1)) / (t2 - t1);
|
|
a = a1 * (1 - cf) + a2 * cf;
|
|
} else if (now > t3) {
|
|
cf = ((double)(now - t3)) / (t4 - t3);
|
|
a = a2 * (1 - cf) + a3 * cf;
|
|
} else { // t2 <= now <= t3
|
|
a = a2;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
static void reset_render_context(void);
|
|
|
|
/**
|
|
* \brief Parse style override tag.
|
|
* \param p string to parse
|
|
* \param pwr multiplier for some tag effects (comes from \t tags)
|
|
*/
|
|
static char* parse_tag(char* p, double pwr) {
|
|
#define skip_to(x) while ((*p != (x)) && (*p != '}') && (*p != 0)) { ++p;}
|
|
#define skip(x) if (*p == (x)) ++p; else { return p; }
|
|
|
|
skip_to('\\');
|
|
skip('\\');
|
|
if ((*p == '}') || (*p == 0))
|
|
return p;
|
|
|
|
// New tags introduced in vsfilter 2.39
|
|
if (mystrcmp(&p, "xbord")) {
|
|
double val;
|
|
if (mystrtod(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\xbord%.2f\n", val);
|
|
} else if (mystrcmp(&p, "ybord")) {
|
|
double val;
|
|
if (mystrtod(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\ybord%.2f\n", val);
|
|
} else if (mystrcmp(&p, "xshad")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\xshad%d\n", val);
|
|
} else if (mystrcmp(&p, "yshad")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\yshad%d\n", val);
|
|
} else if (mystrcmp(&p, "fax")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\fax%d\n", val);
|
|
} else if (mystrcmp(&p, "fay")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val))
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\fay%d\n", val);
|
|
} else if (mystrcmp(&p, "iclip")) {
|
|
int x0, y0, x1, y1;
|
|
int res = 1;
|
|
skip('(');
|
|
res &= mystrtoi(&p, &x0);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &y0);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &x1);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &y1);
|
|
skip(')');
|
|
mp_msg(MSGT_ASS, MSGL_V, "stub: \\iclip(%d,%d,%d,%d)\n", x0, y0, x1, y1);
|
|
} else if (mystrcmp(&p, "blur")) {
|
|
double val;
|
|
if (mystrtod(&p, &val)) {
|
|
val = (val < 0) ? 0 : val;
|
|
val = (val > BLUR_MAX_RADIUS) ? BLUR_MAX_RADIUS : val;
|
|
render_context.blur = val;
|
|
} else
|
|
render_context.blur = 0.0;
|
|
// ASS standard tags
|
|
} else if (mystrcmp(&p, "fsc")) {
|
|
char tp = *p++;
|
|
double val;
|
|
if (tp == 'x') {
|
|
if (mystrtod(&p, &val)) {
|
|
val /= 100;
|
|
render_context.scale_x = render_context.scale_x * ( 1 - pwr) + val * pwr;
|
|
} else
|
|
render_context.scale_x = render_context.style->ScaleX;
|
|
} else if (tp == 'y') {
|
|
if (mystrtod(&p, &val)) {
|
|
val /= 100;
|
|
render_context.scale_y = render_context.scale_y * ( 1 - pwr) + val * pwr;
|
|
} else
|
|
render_context.scale_y = render_context.style->ScaleY;
|
|
}
|
|
} else if (mystrcmp(&p, "fsp")) {
|
|
double val;
|
|
if (mystrtod(&p, &val))
|
|
render_context.hspacing = render_context.hspacing * ( 1 - pwr ) + val * pwr;
|
|
else
|
|
render_context.hspacing = render_context.style->Spacing;
|
|
} else if (mystrcmp(&p, "fs")) {
|
|
double val;
|
|
if (mystrtod(&p, &val))
|
|
val = render_context.font_size * ( 1 - pwr ) + val * pwr;
|
|
else
|
|
val = render_context.style->FontSize;
|
|
if (render_context.font)
|
|
change_font_size(val);
|
|
} else if (mystrcmp(&p, "bord")) {
|
|
double val;
|
|
if (mystrtod(&p, &val))
|
|
val = render_context.border * ( 1 - pwr ) + val * pwr;
|
|
else
|
|
val = -1.; // reset to default
|
|
change_border(val);
|
|
} else if (mystrcmp(&p, "move")) {
|
|
double x1, x2, y1, y2;
|
|
long long t1, t2, delta_t, t;
|
|
double x, y;
|
|
double k;
|
|
skip('(');
|
|
mystrtod(&p, &x1);
|
|
skip(',');
|
|
mystrtod(&p, &y1);
|
|
skip(',');
|
|
mystrtod(&p, &x2);
|
|
skip(',');
|
|
mystrtod(&p, &y2);
|
|
if (*p == ',') {
|
|
skip(',');
|
|
mystrtoll(&p, &t1);
|
|
skip(',');
|
|
mystrtoll(&p, &t2);
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "movement6: (%f, %f) -> (%f, %f), (%" PRId64 " .. %" PRId64 ")\n",
|
|
x1, y1, x2, y2, (int64_t)t1, (int64_t)t2);
|
|
} else {
|
|
t1 = 0;
|
|
t2 = render_context.event->Duration;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "movement: (%f, %f) -> (%f, %f)\n", x1, y1, x2, y2);
|
|
}
|
|
skip(')');
|
|
delta_t = t2 - t1;
|
|
t = frame_context.time - render_context.event->Start;
|
|
if (t < t1)
|
|
k = 0.;
|
|
else if (t > t2)
|
|
k = 1.;
|
|
else k = ((double)(t - t1)) / delta_t;
|
|
x = k * (x2 - x1) + x1;
|
|
y = k * (y2 - y1) + y1;
|
|
if (render_context.evt_type != EVENT_POSITIONED) {
|
|
render_context.pos_x = x;
|
|
render_context.pos_y = y;
|
|
render_context.detect_collisions = 0;
|
|
render_context.evt_type = EVENT_POSITIONED;
|
|
}
|
|
} else if (mystrcmp(&p, "frx")) {
|
|
double val;
|
|
if (mystrtod(&p, &val)) {
|
|
val *= M_PI / 180;
|
|
render_context.frx = val * pwr + render_context.frx * (1-pwr);
|
|
} else
|
|
render_context.frx = 0.;
|
|
} else if (mystrcmp(&p, "fry")) {
|
|
double val;
|
|
if (mystrtod(&p, &val)) {
|
|
val *= M_PI / 180;
|
|
render_context.fry = val * pwr + render_context.fry * (1-pwr);
|
|
} else
|
|
render_context.fry = 0.;
|
|
} else if (mystrcmp(&p, "frz") || mystrcmp(&p, "fr")) {
|
|
double val;
|
|
if (mystrtod(&p, &val)) {
|
|
val *= M_PI / 180;
|
|
render_context.frz = val * pwr + render_context.frz * (1-pwr);
|
|
} else
|
|
render_context.frz = M_PI * render_context.style->Angle / 180.;
|
|
} else if (mystrcmp(&p, "fn")) {
|
|
char* start = p;
|
|
char* family;
|
|
skip_to('\\');
|
|
if (p > start) {
|
|
family = malloc(p - start + 1);
|
|
strncpy(family, start, p - start);
|
|
family[p - start] = '\0';
|
|
} else
|
|
family = strdup(render_context.style->FontName);
|
|
if (render_context.family)
|
|
free(render_context.family);
|
|
render_context.family = family;
|
|
update_font();
|
|
} else if (mystrcmp(&p, "alpha")) {
|
|
uint32_t val;
|
|
int i;
|
|
if (strtocolor(&p, &val)) {
|
|
unsigned char a = val >> 24;
|
|
for (i = 0; i < 4; ++i)
|
|
change_alpha(&render_context.c[i], a, pwr);
|
|
} else {
|
|
change_alpha(&render_context.c[0], render_context.style->PrimaryColour, pwr);
|
|
change_alpha(&render_context.c[1], render_context.style->SecondaryColour, pwr);
|
|
change_alpha(&render_context.c[2], render_context.style->OutlineColour, pwr);
|
|
change_alpha(&render_context.c[3], render_context.style->BackColour, pwr);
|
|
}
|
|
// FIXME: simplify
|
|
} else if (mystrcmp(&p, "an")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val) {
|
|
int v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "an %d\n", val);
|
|
if (v != 0) v = 3 - v;
|
|
val = ((val - 1) % 3) + 1; // horizontal alignment
|
|
val += v*4;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "align %d\n", val);
|
|
render_context.alignment = val;
|
|
} else
|
|
render_context.alignment = render_context.style->Alignment;
|
|
} else if (mystrcmp(&p, "a")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val)
|
|
render_context.alignment = val;
|
|
else
|
|
render_context.alignment = render_context.style->Alignment;
|
|
} else if (mystrcmp(&p, "pos")) {
|
|
double v1, v2;
|
|
skip('(');
|
|
mystrtod(&p, &v1);
|
|
skip(',');
|
|
mystrtod(&p, &v2);
|
|
skip(')');
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "pos(%f, %f)\n", v1, v2);
|
|
if (render_context.evt_type != EVENT_POSITIONED) {
|
|
render_context.evt_type = EVENT_POSITIONED;
|
|
render_context.detect_collisions = 0;
|
|
render_context.pos_x = v1;
|
|
render_context.pos_y = v2;
|
|
}
|
|
} else if (mystrcmp(&p, "fad")) {
|
|
int a1, a2, a3;
|
|
long long t1, t2, t3, t4;
|
|
if (*p == 'e') ++p; // either \fad or \fade
|
|
skip('(');
|
|
mystrtoi(&p, &a1);
|
|
skip(',');
|
|
mystrtoi(&p, &a2);
|
|
if (*p == ')') {
|
|
// 2-argument version (\fad, according to specs)
|
|
// a1 and a2 are fade-in and fade-out durations
|
|
t1 = 0;
|
|
t4 = render_context.event->Duration;
|
|
t2 = a1;
|
|
t3 = t4 - a2;
|
|
a1 = 0xFF;
|
|
a2 = 0;
|
|
a3 = 0xFF;
|
|
} else {
|
|
// 6-argument version (\fade)
|
|
// a1 and a2 (and a3) are opacity values
|
|
skip(',');
|
|
mystrtoi(&p, &a3);
|
|
skip(',');
|
|
mystrtoll(&p, &t1);
|
|
skip(',');
|
|
mystrtoll(&p, &t2);
|
|
skip(',');
|
|
mystrtoll(&p, &t3);
|
|
skip(',');
|
|
mystrtoll(&p, &t4);
|
|
}
|
|
skip(')');
|
|
render_context.fade = interpolate_alpha(frame_context.time - render_context.event->Start, t1, t2, t3, t4, a1, a2, a3);
|
|
} else if (mystrcmp(&p, "org")) {
|
|
int v1, v2;
|
|
skip('(');
|
|
mystrtoi(&p, &v1);
|
|
skip(',');
|
|
mystrtoi(&p, &v2);
|
|
skip(')');
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "org(%d, %d)\n", v1, v2);
|
|
// render_context.evt_type = EVENT_POSITIONED;
|
|
if (!render_context.have_origin) {
|
|
render_context.org_x = v1;
|
|
render_context.org_y = v2;
|
|
render_context.have_origin = 1;
|
|
render_context.detect_collisions = 0;
|
|
}
|
|
} else if (mystrcmp(&p, "t")) {
|
|
double v[3];
|
|
int v1, v2;
|
|
double v3;
|
|
int cnt;
|
|
long long t1, t2, t, delta_t;
|
|
double k;
|
|
skip('(');
|
|
for (cnt = 0; cnt < 3; ++cnt) {
|
|
if (*p == '\\')
|
|
break;
|
|
v[cnt] = strtod(p, &p);
|
|
skip(',');
|
|
}
|
|
if (cnt == 3) {
|
|
v1 = v[0]; v2 = v[1]; v3 = v[2];
|
|
} else if (cnt == 2) {
|
|
v1 = v[0]; v2 = v[1]; v3 = 1.;
|
|
} else if (cnt == 1) {
|
|
v1 = 0; v2 = render_context.event->Duration; v3 = v[0];
|
|
} else { // cnt == 0
|
|
v1 = 0; v2 = render_context.event->Duration; v3 = 1.;
|
|
}
|
|
render_context.detect_collisions = 0;
|
|
t1 = v1;
|
|
t2 = v2;
|
|
delta_t = v2 - v1;
|
|
if (v3 < 0.)
|
|
v3 = 0.;
|
|
t = frame_context.time - render_context.event->Start; // FIXME: move to render_context
|
|
if (t <= t1)
|
|
k = 0.;
|
|
else if (t >= t2)
|
|
k = 1.;
|
|
else {
|
|
assert(delta_t != 0.);
|
|
k = pow(((double)(t - t1)) / delta_t, v3);
|
|
}
|
|
while (*p == '\\')
|
|
p = parse_tag(p, k); // maybe k*pwr ? no, specs forbid nested \t's
|
|
skip_to(')'); // in case there is some unknown tag or a comment
|
|
skip(')');
|
|
} else if (mystrcmp(&p, "clip")) {
|
|
int x0, y0, x1, y1;
|
|
int res = 1;
|
|
skip('(');
|
|
res &= mystrtoi(&p, &x0);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &y0);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &x1);
|
|
skip(',');
|
|
res &= mystrtoi(&p, &y1);
|
|
skip(')');
|
|
if (res) {
|
|
render_context.clip_x0 = render_context.clip_x0 * (1-pwr) + x0 * pwr;
|
|
render_context.clip_x1 = render_context.clip_x1 * (1-pwr) + x1 * pwr;
|
|
render_context.clip_y0 = render_context.clip_y0 * (1-pwr) + y0 * pwr;
|
|
render_context.clip_y1 = render_context.clip_y1 * (1-pwr) + y1 * pwr;
|
|
} else {
|
|
render_context.clip_x0 = 0;
|
|
render_context.clip_y0 = 0;
|
|
render_context.clip_x1 = frame_context.track->PlayResX;
|
|
render_context.clip_y1 = frame_context.track->PlayResY;
|
|
}
|
|
} else if (mystrcmp(&p, "c")) {
|
|
uint32_t val;
|
|
if (!strtocolor(&p, &val))
|
|
val = render_context.style->PrimaryColour;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "color: %X\n", val);
|
|
change_color(&render_context.c[0], val, pwr);
|
|
} else if ((*p >= '1') && (*p <= '4') && (++p) && (mystrcmp(&p, "c") || mystrcmp(&p, "a"))) {
|
|
char n = *(p-2);
|
|
int cidx = n - '1';
|
|
char cmd = *(p-1);
|
|
uint32_t val;
|
|
assert((n >= '1') && (n <= '4'));
|
|
if (!strtocolor(&p, &val))
|
|
switch(n) {
|
|
case '1': val = render_context.style->PrimaryColour; break;
|
|
case '2': val = render_context.style->SecondaryColour; break;
|
|
case '3': val = render_context.style->OutlineColour; break;
|
|
case '4': val = render_context.style->BackColour; break;
|
|
default : val = 0; break; // impossible due to assert; avoid compilation warning
|
|
}
|
|
switch (cmd) {
|
|
case 'c': change_color(render_context.c + cidx, val, pwr); break;
|
|
case 'a': change_alpha(render_context.c + cidx, val >> 24, pwr); break;
|
|
default: mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_BadCommand, n, cmd); break;
|
|
}
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "single c/a at %f: %c%c = %X \n", pwr, n, cmd, render_context.c[cidx]);
|
|
} else if (mystrcmp(&p, "r")) {
|
|
reset_render_context();
|
|
} else if (mystrcmp(&p, "be")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val)) {
|
|
// Clamp to a safe upper limit, since high values need excessive CPU
|
|
val = (val < 0) ? 0 : val;
|
|
val = (val > MAX_BE) ? MAX_BE : val;
|
|
render_context.be = val;
|
|
} else
|
|
render_context.be = 0;
|
|
} else if (mystrcmp(&p, "b")) {
|
|
int b;
|
|
if (mystrtoi(&p, &b)) {
|
|
if (pwr >= .5)
|
|
render_context.bold = b;
|
|
} else
|
|
render_context.bold = render_context.style->Bold;
|
|
update_font();
|
|
} else if (mystrcmp(&p, "i")) {
|
|
int i;
|
|
if (mystrtoi(&p, &i)) {
|
|
if (pwr >= .5)
|
|
render_context.italic = i;
|
|
} else
|
|
render_context.italic = render_context.style->Italic;
|
|
update_font();
|
|
} else if (mystrcmp(&p, "kf") || mystrcmp(&p, "K")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_context.effect_type = EF_KARAOKE_KF;
|
|
if (render_context.effect_timing)
|
|
render_context.effect_skip_timing += render_context.effect_timing;
|
|
render_context.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "ko")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_context.effect_type = EF_KARAOKE_KO;
|
|
if (render_context.effect_timing)
|
|
render_context.effect_skip_timing += render_context.effect_timing;
|
|
render_context.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "k")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_context.effect_type = EF_KARAOKE;
|
|
if (render_context.effect_timing)
|
|
render_context.effect_skip_timing += render_context.effect_timing;
|
|
render_context.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "shad")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val))
|
|
render_context.shadow = val;
|
|
else
|
|
render_context.shadow = render_context.style->Shadow;
|
|
} else if (mystrcmp(&p, "pbo")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val); // ignored
|
|
} else if (mystrcmp(&p, "p")) {
|
|
int val;
|
|
if (!mystrtoi(&p, &val))
|
|
val = 0;
|
|
render_context.drawing_mode = !!val;
|
|
}
|
|
|
|
return p;
|
|
|
|
#undef skip
|
|
#undef skip_to
|
|
}
|
|
|
|
/**
|
|
* \brief Get next ucs4 char from string, parsing and executing style overrides
|
|
* \param str string pointer
|
|
* \return ucs4 code of the next char
|
|
* On return str points to the unparsed part of the string
|
|
*/
|
|
static unsigned get_next_char(char** str)
|
|
{
|
|
char* p = *str;
|
|
unsigned chr;
|
|
if (*p == '{') { // '\0' goes here
|
|
p++;
|
|
while (1) {
|
|
p = parse_tag(p, 1.);
|
|
if (*p == '}') { // end of tag
|
|
p++;
|
|
if (*p == '{') {
|
|
p++;
|
|
continue;
|
|
} else
|
|
break;
|
|
} else if (*p != '\\')
|
|
mp_msg(MSGT_ASS, MSGL_V, "Unable to parse: \"%s\" \n", p);
|
|
if (*p == 0)
|
|
break;
|
|
}
|
|
}
|
|
if (*p == '\t') {
|
|
++p;
|
|
*str = p;
|
|
return ' ';
|
|
}
|
|
if (*p == '\\') {
|
|
if ((*(p+1) == 'N') || ((*(p+1) == 'n') && (frame_context.track->WrapStyle == 2))) {
|
|
p += 2;
|
|
*str = p;
|
|
return '\n';
|
|
} else if ((*(p+1) == 'n') || (*(p+1) == 'h')) {
|
|
p += 2;
|
|
*str = p;
|
|
return ' ';
|
|
}
|
|
}
|
|
chr = utf8_get_char((const char **)&p);
|
|
*str = p;
|
|
return chr;
|
|
}
|
|
|
|
static void apply_transition_effects(ass_event_t* event)
|
|
{
|
|
int v[4];
|
|
int cnt;
|
|
char* p = event->Effect;
|
|
|
|
if (!p || !*p) return;
|
|
|
|
cnt = 0;
|
|
while (cnt < 4 && (p = strchr(p, ';'))) {
|
|
v[cnt++] = atoi(++p);
|
|
}
|
|
|
|
if (strncmp(event->Effect, "Banner;", 7) == 0) {
|
|
int delay;
|
|
if (cnt < 1) {
|
|
mp_msg(MSGT_ASS, MSGL_V, "Error parsing effect: %s \n", event->Effect);
|
|
return;
|
|
}
|
|
if (cnt >= 2 && v[1] == 0) // right-to-left
|
|
render_context.scroll_direction = SCROLL_RL;
|
|
else // left-to-right
|
|
render_context.scroll_direction = SCROLL_LR;
|
|
|
|
delay = v[0];
|
|
if (delay == 0) delay = 1; // ?
|
|
render_context.scroll_shift = (frame_context.time - render_context.event->Start) / delay;
|
|
render_context.evt_type = EVENT_HSCROLL;
|
|
return;
|
|
}
|
|
|
|
if (strncmp(event->Effect, "Scroll up;", 10) == 0) {
|
|
render_context.scroll_direction = SCROLL_BT;
|
|
} else if (strncmp(event->Effect, "Scroll down;", 12) == 0) {
|
|
render_context.scroll_direction = SCROLL_TB;
|
|
} else {
|
|
mp_msg(MSGT_ASS, MSGL_V, "Unknown transition effect: %s \n", event->Effect);
|
|
return;
|
|
}
|
|
// parse scroll up/down parameters
|
|
{
|
|
int delay;
|
|
int y0, y1;
|
|
if (cnt < 3) {
|
|
mp_msg(MSGT_ASS, MSGL_V, "Error parsing effect: %s \n", event->Effect);
|
|
return;
|
|
}
|
|
delay = v[2];
|
|
if (delay == 0) delay = 1; // ?
|
|
render_context.scroll_shift = (frame_context.time - render_context.event->Start) / delay;
|
|
if (v[0] < v[1]) {
|
|
y0 = v[0]; y1 = v[1];
|
|
} else {
|
|
y0 = v[1]; y1 = v[0];
|
|
}
|
|
if (y1 == 0)
|
|
y1 = frame_context.track->PlayResY; // y0=y1=0 means fullscreen scrolling
|
|
render_context.clip_y0 = y0;
|
|
render_context.clip_y1 = y1;
|
|
render_context.evt_type = EVENT_VSCROLL;
|
|
render_context.detect_collisions = 0;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* \brief partially reset render_context to style values
|
|
* Works like {\r}: resets some style overrides
|
|
*/
|
|
static void reset_render_context(void)
|
|
{
|
|
render_context.c[0] = render_context.style->PrimaryColour;
|
|
render_context.c[1] = render_context.style->SecondaryColour;
|
|
render_context.c[2] = render_context.style->OutlineColour;
|
|
render_context.c[3] = render_context.style->BackColour;
|
|
render_context.font_size = render_context.style->FontSize;
|
|
|
|
if (render_context.family)
|
|
free(render_context.family);
|
|
render_context.family = strdup(render_context.style->FontName);
|
|
render_context.treat_family_as_pattern = render_context.style->treat_fontname_as_pattern;
|
|
render_context.bold = render_context.style->Bold;
|
|
render_context.italic = render_context.style->Italic;
|
|
update_font();
|
|
|
|
change_border(-1.);
|
|
render_context.scale_x = render_context.style->ScaleX;
|
|
render_context.scale_y = render_context.style->ScaleY;
|
|
render_context.hspacing = render_context.style->Spacing;
|
|
render_context.be = 0;
|
|
render_context.blur = 0.0;
|
|
render_context.shadow = render_context.style->Shadow;
|
|
render_context.frx = render_context.fry = 0.;
|
|
render_context.frz = M_PI * render_context.style->Angle / 180.;
|
|
|
|
// FIXME: does not reset unsupported attributes.
|
|
}
|
|
|
|
/**
|
|
* \brief Start new event. Reset render_context.
|
|
*/
|
|
static void init_render_context(ass_event_t* event)
|
|
{
|
|
render_context.event = event;
|
|
render_context.style = frame_context.track->styles + event->Style;
|
|
|
|
reset_render_context();
|
|
|
|
render_context.evt_type = EVENT_NORMAL;
|
|
render_context.alignment = render_context.style->Alignment;
|
|
render_context.pos_x = 0;
|
|
render_context.pos_y = 0;
|
|
render_context.org_x = 0;
|
|
render_context.org_y = 0;
|
|
render_context.have_origin = 0;
|
|
render_context.clip_x0 = 0;
|
|
render_context.clip_y0 = 0;
|
|
render_context.clip_x1 = frame_context.track->PlayResX;
|
|
render_context.clip_y1 = frame_context.track->PlayResY;
|
|
render_context.detect_collisions = 1;
|
|
render_context.fade = 0;
|
|
render_context.drawing_mode = 0;
|
|
render_context.effect_type = EF_NONE;
|
|
render_context.effect_timing = 0;
|
|
render_context.effect_skip_timing = 0;
|
|
|
|
apply_transition_effects(event);
|
|
}
|
|
|
|
static void free_render_context(void)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* \brief Get normal and outline (border) glyphs
|
|
* \param symbol ucs4 char
|
|
* \param info out: struct filled with extracted data
|
|
* \param advance subpixel shift vector used for cache lookup
|
|
* Tries to get both glyphs from cache.
|
|
* If they can't be found, gets a glyph from font face, generates outline with FT_Stroker,
|
|
* and add them to cache.
|
|
* The glyphs are returned in info->glyph and info->outline_glyph
|
|
*/
|
|
static void get_outline_glyph(int symbol, glyph_info_t* info, FT_Vector* advance)
|
|
{
|
|
int error;
|
|
glyph_hash_val_t* val;
|
|
glyph_hash_key_t key;
|
|
memset(&key, 0, sizeof(key));
|
|
key.font = render_context.font;
|
|
key.size = render_context.font_size;
|
|
key.ch = symbol;
|
|
key.scale_x = (render_context.scale_x * 0xFFFF);
|
|
key.scale_y = (render_context.scale_y * 0xFFFF);
|
|
key.advance = *advance;
|
|
key.bold = render_context.bold;
|
|
key.italic = render_context.italic;
|
|
key.outline = render_context.border * 0xFFFF;
|
|
|
|
memset(info, 0, sizeof(glyph_info_t));
|
|
|
|
val = cache_find_glyph(&key);
|
|
if (val) {
|
|
FT_Glyph_Copy(val->glyph, &info->glyph);
|
|
if (val->outline_glyph)
|
|
FT_Glyph_Copy(val->outline_glyph, &info->outline_glyph);
|
|
info->bbox = val->bbox_scaled;
|
|
info->advance.x = val->advance.x;
|
|
info->advance.y = val->advance.y;
|
|
} else {
|
|
glyph_hash_val_t v;
|
|
info->glyph = ass_font_get_glyph(frame_context.ass_priv->fontconfig_priv, render_context.font, symbol, global_settings->hinting);
|
|
if (!info->glyph)
|
|
return;
|
|
info->advance.x = d16_to_d6(info->glyph->advance.x);
|
|
info->advance.y = d16_to_d6(info->glyph->advance.y);
|
|
FT_Glyph_Get_CBox( info->glyph, FT_GLYPH_BBOX_PIXELS, &info->bbox);
|
|
|
|
if (render_context.stroker) {
|
|
info->outline_glyph = info->glyph;
|
|
error = FT_Glyph_StrokeBorder( &(info->outline_glyph), render_context.stroker, 0 , 0 ); // don't destroy original
|
|
if (error) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FT_Glyph_Stroke_Error, error);
|
|
}
|
|
}
|
|
|
|
memset(&v, 0, sizeof(v));
|
|
FT_Glyph_Copy(info->glyph, &v.glyph);
|
|
if (info->outline_glyph)
|
|
FT_Glyph_Copy(info->outline_glyph, &v.outline_glyph);
|
|
v.advance = info->advance;
|
|
v.bbox_scaled = info->bbox;
|
|
cache_add_glyph(&key, &v);
|
|
}
|
|
}
|
|
|
|
static void transform_3d(FT_Vector shift, FT_Glyph* glyph, FT_Glyph* glyph2, double frx, double fry, double frz);
|
|
|
|
/**
|
|
* \brief Get bitmaps for a glyph
|
|
* \param info glyph info
|
|
* Tries to get glyph bitmaps from bitmap cache.
|
|
* If they can't be found, they are generated by rotating and rendering the glyph.
|
|
* After that, bitmaps are added to the cache.
|
|
* They are returned in info->bm (glyph), info->bm_o (outline) and info->bm_s (shadow).
|
|
*/
|
|
static void get_bitmap_glyph(glyph_info_t* info)
|
|
{
|
|
bitmap_hash_val_t* val;
|
|
bitmap_hash_key_t* key = &info->hash_key;
|
|
|
|
val = cache_find_bitmap(key);
|
|
/* val = 0; */
|
|
|
|
if (val) {
|
|
info->bm = val->bm;
|
|
info->bm_o = val->bm_o;
|
|
info->bm_s = val->bm_s;
|
|
} else {
|
|
FT_Vector shift;
|
|
bitmap_hash_val_t hash_val;
|
|
int error;
|
|
info->bm = info->bm_o = info->bm_s = 0;
|
|
if (info->glyph && info->symbol != '\n' && info->symbol != 0) {
|
|
// calculating rotation shift vector (from rotation origin to the glyph basepoint)
|
|
shift.x = int_to_d6(info->hash_key.shift_x);
|
|
shift.y = int_to_d6(info->hash_key.shift_y);
|
|
// apply rotation
|
|
transform_3d(shift, &info->glyph, &info->outline_glyph, info->frx, info->fry, info->frz);
|
|
|
|
// render glyph
|
|
error = glyph_to_bitmap(ass_renderer->synth_priv,
|
|
info->glyph, info->outline_glyph,
|
|
&info->bm, &info->bm_o,
|
|
&info->bm_s, info->be, info->blur * frame_context.border_scale);
|
|
if (error)
|
|
info->symbol = 0;
|
|
|
|
// add bitmaps to cache
|
|
hash_val.bm_o = info->bm_o;
|
|
hash_val.bm = info->bm;
|
|
hash_val.bm_s = info->bm_s;
|
|
cache_add_bitmap(&(info->hash_key), &hash_val);
|
|
}
|
|
}
|
|
// deallocate glyphs
|
|
if (info->glyph)
|
|
FT_Done_Glyph(info->glyph);
|
|
if (info->outline_glyph)
|
|
FT_Done_Glyph(info->outline_glyph);
|
|
}
|
|
|
|
/**
|
|
* This function goes through text_info and calculates text parameters.
|
|
* The following text_info fields are filled:
|
|
* height
|
|
* lines[].height
|
|
* lines[].asc
|
|
* lines[].desc
|
|
*/
|
|
static void measure_text(void)
|
|
{
|
|
int cur_line = 0, max_asc = 0, max_desc = 0;
|
|
int i;
|
|
text_info.height = 0;
|
|
for (i = 0; i < text_info.length + 1; ++i) {
|
|
if ((i == text_info.length) || text_info.glyphs[i].linebreak) {
|
|
text_info.lines[cur_line].asc = max_asc;
|
|
text_info.lines[cur_line].desc = max_desc;
|
|
text_info.height += max_asc + max_desc;
|
|
cur_line ++;
|
|
max_asc = max_desc = 0;
|
|
}
|
|
if (i < text_info.length) {
|
|
glyph_info_t* cur = text_info.glyphs + i;
|
|
if (cur->asc > max_asc)
|
|
max_asc = cur->asc;
|
|
if (cur->desc > max_desc)
|
|
max_desc = cur->desc;
|
|
}
|
|
}
|
|
text_info.height += (text_info.n_lines - 1) * double_to_d6(global_settings->line_spacing);
|
|
}
|
|
|
|
/**
|
|
* \brief rearrange text between lines
|
|
* \param max_text_width maximal text line width in pixels
|
|
* The algo is similar to the one in libvo/sub.c:
|
|
* 1. Place text, wrapping it when current line is full
|
|
* 2. Try moving words from the end of a line to the beginning of the next one while it reduces
|
|
* the difference in lengths between this two lines.
|
|
* The result may not be optimal, but usually is good enough.
|
|
*/
|
|
static void wrap_lines_smart(int max_text_width)
|
|
{
|
|
int i, j;
|
|
glyph_info_t *cur, *s1, *e1, *s2, *s3, *w;
|
|
int last_space;
|
|
int break_type;
|
|
int exit;
|
|
int pen_shift_x;
|
|
int pen_shift_y;
|
|
int cur_line;
|
|
|
|
last_space = -1;
|
|
text_info.n_lines = 1;
|
|
break_type = 0;
|
|
s1 = text_info.glyphs; // current line start
|
|
for (i = 0; i < text_info.length; ++i) {
|
|
int break_at, s_offset, len;
|
|
cur = text_info.glyphs + i;
|
|
break_at = -1;
|
|
s_offset = s1->bbox.xMin + s1->pos.x;
|
|
len = (cur->bbox.xMax + cur->pos.x) - s_offset;
|
|
|
|
if (cur->symbol == '\n') {
|
|
break_type = 2;
|
|
break_at = i;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "forced line break at %d\n", break_at);
|
|
}
|
|
|
|
if (len >= max_text_width) {
|
|
break_type = 1;
|
|
break_at = last_space;
|
|
if (break_at == -1)
|
|
break_at = i - 1;
|
|
if (break_at == -1)
|
|
break_at = 0;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "overfill at %d\n", i);
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "line break at %d\n", break_at);
|
|
}
|
|
|
|
if (break_at != -1) {
|
|
// need to use one more line
|
|
// marking break_at+1 as start of a new line
|
|
int lead = break_at + 1; // the first symbol of the new line
|
|
if (text_info.n_lines >= MAX_LINES) {
|
|
// to many lines !
|
|
// no more linebreaks
|
|
for (j = lead; j < text_info.length; ++j)
|
|
text_info.glyphs[j].linebreak = 0;
|
|
break;
|
|
}
|
|
if (lead < text_info.length)
|
|
text_info.glyphs[lead].linebreak = break_type;
|
|
last_space = -1;
|
|
s1 = text_info.glyphs + lead;
|
|
s_offset = s1->bbox.xMin + s1->pos.x;
|
|
text_info.n_lines ++;
|
|
}
|
|
|
|
if (cur->symbol == ' ')
|
|
last_space = i;
|
|
|
|
// make sure the hard linebreak is not forgotten when
|
|
// there was a new soft linebreak just inserted
|
|
if (cur->symbol == '\n' && break_type == 1)
|
|
i--;
|
|
}
|
|
#define DIFF(x,y) (((x) < (y)) ? (y - x) : (x - y))
|
|
exit = 0;
|
|
while (!exit) {
|
|
exit = 1;
|
|
w = s3 = text_info.glyphs;
|
|
s1 = s2 = 0;
|
|
for (i = 0; i <= text_info.length; ++i) {
|
|
cur = text_info.glyphs + i;
|
|
if ((i == text_info.length) || cur->linebreak) {
|
|
s1 = s2;
|
|
s2 = s3;
|
|
s3 = cur;
|
|
if (s1 && (s2->linebreak == 1)) { // have at least 2 lines, and linebreak is 'soft'
|
|
int l1, l2, l1_new, l2_new;
|
|
|
|
w = s2;
|
|
do { --w; } while ((w > s1) && (w->symbol == ' '));
|
|
while ((w > s1) && (w->symbol != ' ')) { --w; }
|
|
e1 = w;
|
|
while ((e1 > s1) && (e1->symbol == ' ')) { --e1; }
|
|
if (w->symbol == ' ') ++w;
|
|
|
|
l1 = ((s2-1)->bbox.xMax + (s2-1)->pos.x) - (s1->bbox.xMin + s1->pos.x);
|
|
l2 = ((s3-1)->bbox.xMax + (s3-1)->pos.x) - (s2->bbox.xMin + s2->pos.x);
|
|
l1_new = (e1->bbox.xMax + e1->pos.x) - (s1->bbox.xMin + s1->pos.x);
|
|
l2_new = ((s3-1)->bbox.xMax + (s3-1)->pos.x) - (w->bbox.xMin + w->pos.x);
|
|
|
|
if (DIFF(l1_new, l2_new) < DIFF(l1, l2)) {
|
|
w->linebreak = 1;
|
|
s2->linebreak = 0;
|
|
exit = 0;
|
|
}
|
|
}
|
|
}
|
|
if (i == text_info.length)
|
|
break;
|
|
}
|
|
|
|
}
|
|
assert(text_info.n_lines >= 1);
|
|
#undef DIFF
|
|
|
|
measure_text();
|
|
|
|
pen_shift_x = 0;
|
|
pen_shift_y = 0;
|
|
cur_line = 1;
|
|
for (i = 0; i < text_info.length; ++i) {
|
|
cur = text_info.glyphs + i;
|
|
if (cur->linebreak) {
|
|
int height = text_info.lines[cur_line - 1].desc + text_info.lines[cur_line].asc;
|
|
cur_line ++;
|
|
pen_shift_x = - cur->pos.x;
|
|
pen_shift_y += d6_to_int(height + double_to_d6(global_settings->line_spacing));
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "shifting from %d to %d by (%d, %d)\n", i, text_info.length - 1, pen_shift_x, pen_shift_y);
|
|
}
|
|
cur->pos.x += pen_shift_x;
|
|
cur->pos.y += pen_shift_y;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief determine karaoke effects
|
|
* Karaoke effects cannot be calculated during parse stage (get_next_char()),
|
|
* so they are done in a separate step.
|
|
* Parse stage: when karaoke style override is found, its parameters are stored in the next glyph's
|
|
* (the first glyph of the karaoke word)'s effect_type and effect_timing.
|
|
* This function:
|
|
* 1. sets effect_type for all glyphs in the word (_karaoke_ word)
|
|
* 2. sets effect_timing for all glyphs to x coordinate of the border line between the left and right karaoke parts
|
|
* (left part is filled with PrimaryColour, right one - with SecondaryColour).
|
|
*/
|
|
static void process_karaoke_effects(void)
|
|
{
|
|
glyph_info_t *cur, *cur2;
|
|
glyph_info_t *s1, *e1; // start and end of the current word
|
|
glyph_info_t *s2; // start of the next word
|
|
int i;
|
|
int timing; // current timing
|
|
int tm_start, tm_end; // timings at start and end of the current word
|
|
int tm_current;
|
|
double dt;
|
|
int x;
|
|
int x_start, x_end;
|
|
|
|
tm_current = frame_context.time - render_context.event->Start;
|
|
timing = 0;
|
|
s1 = s2 = 0;
|
|
for (i = 0; i <= text_info.length; ++i) {
|
|
cur = text_info.glyphs + i;
|
|
if ((i == text_info.length) || (cur->effect_type != EF_NONE)) {
|
|
s1 = s2;
|
|
s2 = cur;
|
|
if (s1) {
|
|
e1 = s2 - 1;
|
|
tm_start = timing + s1->effect_skip_timing;
|
|
tm_end = tm_start + s1->effect_timing;
|
|
timing = tm_end;
|
|
x_start = 1000000;
|
|
x_end = -1000000;
|
|
for (cur2 = s1; cur2 <= e1; ++cur2) {
|
|
x_start = FFMIN(x_start, cur2->bbox.xMin + cur2->pos.x);
|
|
x_end = FFMAX(x_end, cur2->bbox.xMax + cur2->pos.x);
|
|
}
|
|
|
|
dt = (tm_current - tm_start);
|
|
if ((s1->effect_type == EF_KARAOKE) || (s1->effect_type == EF_KARAOKE_KO)) {
|
|
if (dt > 0)
|
|
x = x_end + 1;
|
|
else
|
|
x = x_start;
|
|
} else if (s1->effect_type == EF_KARAOKE_KF) {
|
|
dt /= (tm_end - tm_start);
|
|
x = x_start + (x_end - x_start) * dt;
|
|
} else {
|
|
mp_msg(MSGT_ASS, MSGL_ERR, MSGTR_LIBASS_UnknownEffectType_InternalError);
|
|
continue;
|
|
}
|
|
|
|
for (cur2 = s1; cur2 <= e1; ++cur2) {
|
|
cur2->effect_type = s1->effect_type;
|
|
cur2->effect_timing = x - cur2->pos.x;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief Calculate base point for positioning and rotation
|
|
* \param bbox text bbox
|
|
* \param alignment alignment
|
|
* \param bx, by out: base point coordinates
|
|
*/
|
|
static void get_base_point(FT_BBox bbox, int alignment, int* bx, int* by)
|
|
{
|
|
const int halign = alignment & 3;
|
|
const int valign = alignment & 12;
|
|
if (bx)
|
|
switch(halign) {
|
|
case HALIGN_LEFT:
|
|
*bx = bbox.xMin;
|
|
break;
|
|
case HALIGN_CENTER:
|
|
*bx = (bbox.xMax + bbox.xMin) / 2;
|
|
break;
|
|
case HALIGN_RIGHT:
|
|
*bx = bbox.xMax;
|
|
break;
|
|
}
|
|
if (by)
|
|
switch(valign) {
|
|
case VALIGN_TOP:
|
|
*by = bbox.yMin;
|
|
break;
|
|
case VALIGN_CENTER:
|
|
*by = (bbox.yMax + bbox.yMin) / 2;
|
|
break;
|
|
case VALIGN_SUB:
|
|
*by = bbox.yMax;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief Apply transformation to outline points of a glyph
|
|
* Applies rotations given by frx, fry and frz and projects the points back
|
|
* onto the screen plane.
|
|
*/
|
|
static void transform_3d_points(FT_Vector shift, FT_Glyph glyph, double frx, double fry, double frz) {
|
|
double sx = sin(frx);
|
|
double sy = sin(fry);
|
|
double sz = sin(frz);
|
|
double cx = cos(frx);
|
|
double cy = cos(fry);
|
|
double cz = cos(frz);
|
|
FT_Outline *outline = &((FT_OutlineGlyph) glyph)->outline;
|
|
FT_Vector* p = outline->points;
|
|
double x, y, z, xx, yy, zz;
|
|
int i;
|
|
|
|
for (i=0; i<outline->n_points; i++) {
|
|
x = p[i].x + shift.x;
|
|
y = p[i].y + shift.y;
|
|
z = 0.;
|
|
|
|
xx = x*cz + y*sz;
|
|
yy = -(x*sz - y*cz);
|
|
zz = z;
|
|
|
|
x = xx;
|
|
y = yy*cx + zz*sx;
|
|
z = yy*sx - zz*cx;
|
|
|
|
xx = x*cy + z*sy;
|
|
yy = y;
|
|
zz = x*sy - z*cy;
|
|
|
|
zz = FFMAX(zz, -19000);
|
|
|
|
x = (xx * 20000) / (zz + 20000);
|
|
y = (yy * 20000) / (zz + 20000);
|
|
p[i].x = x - shift.x + 0.5;
|
|
p[i].y = y - shift.y + 0.5;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief Apply 3d transformation to several objects
|
|
* \param shift FreeType vector
|
|
* \param glyph FreeType glyph
|
|
* \param glyph2 FreeType glyph
|
|
* \param frx x-axis rotation angle
|
|
* \param fry y-axis rotation angle
|
|
* \param frz z-axis rotation angle
|
|
* Rotates both glyphs by frx, fry and frz. Shift vector is added before rotation and subtracted after it.
|
|
*/
|
|
static void transform_3d(FT_Vector shift, FT_Glyph* glyph, FT_Glyph* glyph2, double frx, double fry, double frz)
|
|
{
|
|
frx = - frx;
|
|
frz = - frz;
|
|
if (frx != 0. || fry != 0. || frz != 0.) {
|
|
if (glyph && *glyph)
|
|
transform_3d_points(shift, *glyph, frx, fry, frz);
|
|
|
|
if (glyph2 && *glyph2)
|
|
transform_3d_points(shift, *glyph2, frx, fry, frz);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief Main ass rendering function, glues everything together
|
|
* \param event event to render
|
|
* \param event_images struct containing resulting images, will also be initialized
|
|
* Process event, appending resulting ass_image_t's to images_root.
|
|
*/
|
|
static int ass_render_event(ass_event_t* event, event_images_t* event_images)
|
|
{
|
|
char* p;
|
|
FT_UInt previous;
|
|
FT_UInt num_glyphs;
|
|
FT_Vector pen;
|
|
unsigned code;
|
|
FT_BBox bbox;
|
|
int i, j;
|
|
FT_Vector shift;
|
|
int MarginL, MarginR, MarginV;
|
|
int last_break;
|
|
int alignment, halign, valign;
|
|
int device_x = 0, device_y = 0;
|
|
|
|
if (event->Style >= frame_context.track->n_styles) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NoStyleFound);
|
|
return 1;
|
|
}
|
|
if (!event->Text) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_EmptyEvent);
|
|
return 1;
|
|
}
|
|
|
|
init_render_context(event);
|
|
|
|
text_info.length = 0;
|
|
pen.x = 0;
|
|
pen.y = 0;
|
|
previous = 0;
|
|
num_glyphs = 0;
|
|
p = event->Text;
|
|
// Event parsing.
|
|
while (1) {
|
|
// get next char, executing style override
|
|
// this affects render_context
|
|
do {
|
|
code = get_next_char(&p);
|
|
} while (code && render_context.drawing_mode); // skip everything in drawing mode
|
|
|
|
// face could have been changed in get_next_char
|
|
if (!render_context.font) {
|
|
free_render_context();
|
|
return 1;
|
|
}
|
|
|
|
if (code == 0)
|
|
break;
|
|
|
|
if (text_info.length >= MAX_GLYPHS) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_MAX_GLYPHS_Reached,
|
|
(int)(event - frame_context.track->events), event->Start, event->Duration, event->Text);
|
|
break;
|
|
}
|
|
|
|
if ( previous && code ) {
|
|
FT_Vector delta;
|
|
delta = ass_font_get_kerning(render_context.font, previous, code);
|
|
pen.x += delta.x * render_context.scale_x;
|
|
pen.y += delta.y * render_context.scale_y;
|
|
}
|
|
|
|
shift.x = pen.x & SUBPIXEL_MASK;
|
|
shift.y = pen.y & SUBPIXEL_MASK;
|
|
|
|
if (render_context.evt_type == EVENT_POSITIONED) {
|
|
shift.x += double_to_d6(x2scr_pos(render_context.pos_x)) & SUBPIXEL_MASK;
|
|
shift.y -= double_to_d6(y2scr_pos(render_context.pos_y)) & SUBPIXEL_MASK;
|
|
}
|
|
|
|
ass_font_set_transform(render_context.font,
|
|
render_context.scale_x * frame_context.font_scale_x,
|
|
render_context.scale_y,
|
|
&shift );
|
|
|
|
get_outline_glyph(code, text_info.glyphs + text_info.length, &shift);
|
|
|
|
text_info.glyphs[text_info.length].pos.x = pen.x >> 6;
|
|
text_info.glyphs[text_info.length].pos.y = pen.y >> 6;
|
|
|
|
pen.x += text_info.glyphs[text_info.length].advance.x;
|
|
pen.x += double_to_d6(render_context.hspacing);
|
|
pen.y += text_info.glyphs[text_info.length].advance.y;
|
|
|
|
previous = code;
|
|
|
|
text_info.glyphs[text_info.length].symbol = code;
|
|
text_info.glyphs[text_info.length].linebreak = 0;
|
|
for (i = 0; i < 4; ++i) {
|
|
uint32_t clr = render_context.c[i];
|
|
change_alpha(&clr, mult_alpha(_a(clr), render_context.fade), 1.);
|
|
text_info.glyphs[text_info.length].c[i] = clr;
|
|
}
|
|
text_info.glyphs[text_info.length].effect_type = render_context.effect_type;
|
|
text_info.glyphs[text_info.length].effect_timing = render_context.effect_timing;
|
|
text_info.glyphs[text_info.length].effect_skip_timing = render_context.effect_skip_timing;
|
|
text_info.glyphs[text_info.length].be = render_context.be;
|
|
text_info.glyphs[text_info.length].blur = render_context.blur;
|
|
text_info.glyphs[text_info.length].shadow = render_context.shadow;
|
|
text_info.glyphs[text_info.length].frx = render_context.frx;
|
|
text_info.glyphs[text_info.length].fry = render_context.fry;
|
|
text_info.glyphs[text_info.length].frz = render_context.frz;
|
|
ass_font_get_asc_desc(render_context.font, code,
|
|
&text_info.glyphs[text_info.length].asc,
|
|
&text_info.glyphs[text_info.length].desc);
|
|
text_info.glyphs[text_info.length].asc *= render_context.scale_y;
|
|
text_info.glyphs[text_info.length].desc *= render_context.scale_y;
|
|
|
|
// fill bitmap_hash_key
|
|
text_info.glyphs[text_info.length].hash_key.font = render_context.font;
|
|
text_info.glyphs[text_info.length].hash_key.size = render_context.font_size;
|
|
text_info.glyphs[text_info.length].hash_key.outline = render_context.border * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.scale_x = render_context.scale_x * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.scale_y = render_context.scale_y * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.frx = render_context.frx * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.fry = render_context.fry * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.frz = render_context.frz * 0xFFFF;
|
|
text_info.glyphs[text_info.length].hash_key.bold = render_context.bold;
|
|
text_info.glyphs[text_info.length].hash_key.italic = render_context.italic;
|
|
text_info.glyphs[text_info.length].hash_key.ch = code;
|
|
text_info.glyphs[text_info.length].hash_key.advance = shift;
|
|
text_info.glyphs[text_info.length].hash_key.be = render_context.be;
|
|
text_info.glyphs[text_info.length].hash_key.blur = render_context.blur;
|
|
|
|
text_info.length++;
|
|
|
|
render_context.effect_type = EF_NONE;
|
|
render_context.effect_timing = 0;
|
|
render_context.effect_skip_timing = 0;
|
|
}
|
|
|
|
if (text_info.length == 0) {
|
|
// no valid symbols in the event; this can be smth like {comment}
|
|
free_render_context();
|
|
return 1;
|
|
}
|
|
|
|
// depends on glyph x coordinates being monotonous, so it should be done before line wrap
|
|
process_karaoke_effects();
|
|
|
|
// alignments
|
|
alignment = render_context.alignment;
|
|
halign = alignment & 3;
|
|
valign = alignment & 12;
|
|
|
|
MarginL = (event->MarginL) ? event->MarginL : render_context.style->MarginL;
|
|
MarginR = (event->MarginR) ? event->MarginR : render_context.style->MarginR;
|
|
MarginV = (event->MarginV) ? event->MarginV : render_context.style->MarginV;
|
|
|
|
if (render_context.evt_type != EVENT_HSCROLL) {
|
|
int max_text_width;
|
|
|
|
// calculate max length of a line
|
|
max_text_width = x2scr(frame_context.track->PlayResX - MarginR) - x2scr(MarginL);
|
|
|
|
// rearrange text in several lines
|
|
wrap_lines_smart(max_text_width);
|
|
|
|
// align text
|
|
last_break = -1;
|
|
for (i = 1; i < text_info.length + 1; ++i) { // (text_info.length + 1) is the end of the last line
|
|
if ((i == text_info.length) || text_info.glyphs[i].linebreak) {
|
|
int width, shift = 0;
|
|
glyph_info_t* first_glyph = text_info.glyphs + last_break + 1;
|
|
glyph_info_t* last_glyph = text_info.glyphs + i - 1;
|
|
|
|
while ((last_glyph > first_glyph) && ((last_glyph->symbol == '\n') || (last_glyph->symbol == 0)))
|
|
last_glyph --;
|
|
|
|
width = last_glyph->pos.x + d6_to_int(last_glyph->advance.x) - first_glyph->pos.x;
|
|
if (halign == HALIGN_LEFT) { // left aligned, no action
|
|
shift = 0;
|
|
} else if (halign == HALIGN_RIGHT) { // right aligned
|
|
shift = max_text_width - width;
|
|
} else if (halign == HALIGN_CENTER) { // centered
|
|
shift = (max_text_width - width) / 2;
|
|
}
|
|
for (j = last_break + 1; j < i; ++j) {
|
|
text_info.glyphs[j].pos.x += shift;
|
|
}
|
|
last_break = i - 1;
|
|
}
|
|
}
|
|
} else { // render_context.evt_type == EVENT_HSCROLL
|
|
measure_text();
|
|
}
|
|
|
|
// determing text bounding box
|
|
compute_string_bbox(&text_info, &bbox);
|
|
|
|
// determine device coordinates for text
|
|
|
|
// x coordinate for everything except positioned events
|
|
if (render_context.evt_type == EVENT_NORMAL ||
|
|
render_context.evt_type == EVENT_VSCROLL) {
|
|
device_x = x2scr(MarginL);
|
|
} else if (render_context.evt_type == EVENT_HSCROLL) {
|
|
if (render_context.scroll_direction == SCROLL_RL)
|
|
device_x = x2scr(frame_context.track->PlayResX - render_context.scroll_shift);
|
|
else if (render_context.scroll_direction == SCROLL_LR)
|
|
device_x = x2scr(render_context.scroll_shift) - (bbox.xMax - bbox.xMin);
|
|
}
|
|
|
|
// y coordinate for everything except positioned events
|
|
if (render_context.evt_type == EVENT_NORMAL ||
|
|
render_context.evt_type == EVENT_HSCROLL) {
|
|
if (valign == VALIGN_TOP) { // toptitle
|
|
device_y = y2scr_top(MarginV) + d6_to_int(text_info.lines[0].asc);
|
|
} else if (valign == VALIGN_CENTER) { // midtitle
|
|
int scr_y = y2scr(frame_context.track->PlayResY / 2);
|
|
device_y = scr_y - (bbox.yMax - bbox.yMin) / 2;
|
|
} else { // subtitle
|
|
int scr_y;
|
|
if (valign != VALIGN_SUB)
|
|
mp_msg(MSGT_ASS, MSGL_V, "Invalid valign, supposing 0 (subtitle)\n");
|
|
scr_y = y2scr_sub(frame_context.track->PlayResY - MarginV);
|
|
device_y = scr_y;
|
|
device_y -= d6_to_int(text_info.height);
|
|
device_y += d6_to_int(text_info.lines[0].asc);
|
|
}
|
|
} else if (render_context.evt_type == EVENT_VSCROLL) {
|
|
if (render_context.scroll_direction == SCROLL_TB)
|
|
device_y = y2scr(render_context.clip_y0 + render_context.scroll_shift) - (bbox.yMax - bbox.yMin);
|
|
else if (render_context.scroll_direction == SCROLL_BT)
|
|
device_y = y2scr(render_context.clip_y1 - render_context.scroll_shift);
|
|
}
|
|
|
|
// positioned events are totally different
|
|
if (render_context.evt_type == EVENT_POSITIONED) {
|
|
int base_x = 0;
|
|
int base_y = 0;
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "positioned event at %f, %f\n", render_context.pos_x, render_context.pos_y);
|
|
get_base_point(bbox, alignment, &base_x, &base_y);
|
|
device_x = x2scr_pos(render_context.pos_x) - base_x;
|
|
device_y = y2scr_pos(render_context.pos_y) - base_y;
|
|
}
|
|
|
|
// fix clip coordinates (they depend on alignment)
|
|
if (render_context.evt_type == EVENT_NORMAL ||
|
|
render_context.evt_type == EVENT_HSCROLL ||
|
|
render_context.evt_type == EVENT_VSCROLL) {
|
|
render_context.clip_x0 = x2scr(render_context.clip_x0);
|
|
render_context.clip_x1 = x2scr(render_context.clip_x1);
|
|
if (valign == VALIGN_TOP) {
|
|
render_context.clip_y0 = y2scr_top(render_context.clip_y0);
|
|
render_context.clip_y1 = y2scr_top(render_context.clip_y1);
|
|
} else if (valign == VALIGN_CENTER) {
|
|
render_context.clip_y0 = y2scr(render_context.clip_y0);
|
|
render_context.clip_y1 = y2scr(render_context.clip_y1);
|
|
} else if (valign == VALIGN_SUB) {
|
|
render_context.clip_y0 = y2scr_sub(render_context.clip_y0);
|
|
render_context.clip_y1 = y2scr_sub(render_context.clip_y1);
|
|
}
|
|
} else if (render_context.evt_type == EVENT_POSITIONED) {
|
|
render_context.clip_x0 = x2scr_pos(render_context.clip_x0);
|
|
render_context.clip_x1 = x2scr_pos(render_context.clip_x1);
|
|
render_context.clip_y0 = y2scr_pos(render_context.clip_y0);
|
|
render_context.clip_y1 = y2scr_pos(render_context.clip_y1);
|
|
}
|
|
|
|
// calculate rotation parameters
|
|
{
|
|
FT_Vector center;
|
|
|
|
if (render_context.have_origin) {
|
|
center.x = x2scr(render_context.org_x);
|
|
center.y = y2scr(render_context.org_y);
|
|
} else {
|
|
int bx = 0, by = 0;
|
|
get_base_point(bbox, alignment, &bx, &by);
|
|
center.x = device_x + bx;
|
|
center.y = device_y + by;
|
|
}
|
|
|
|
for (i = 0; i < text_info.length; ++i) {
|
|
glyph_info_t* info = text_info.glyphs + i;
|
|
|
|
if (info->hash_key.frx || info->hash_key.fry || info->hash_key.frz) {
|
|
info->hash_key.shift_x = info->pos.x + device_x - center.x;
|
|
info->hash_key.shift_y = - (info->pos.y + device_y - center.y);
|
|
} else {
|
|
info->hash_key.shift_x = 0;
|
|
info->hash_key.shift_y = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// convert glyphs to bitmaps
|
|
for (i = 0; i < text_info.length; ++i)
|
|
get_bitmap_glyph(text_info.glyphs + i);
|
|
|
|
memset(event_images, 0, sizeof(*event_images));
|
|
event_images->top = device_y - d6_to_int(text_info.lines[0].asc);
|
|
event_images->height = d6_to_int(text_info.height);
|
|
event_images->detect_collisions = render_context.detect_collisions;
|
|
event_images->shift_direction = (valign == VALIGN_TOP) ? 1 : -1;
|
|
event_images->event = event;
|
|
event_images->imgs = render_text(&text_info, device_x, device_y);
|
|
|
|
free_render_context();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief deallocate image list
|
|
* \param img list pointer
|
|
*/
|
|
void ass_free_images(ass_image_t* img)
|
|
{
|
|
while (img) {
|
|
ass_image_t* next = img->next;
|
|
free(img);
|
|
img = next;
|
|
}
|
|
}
|
|
|
|
static void ass_reconfigure(ass_renderer_t* priv)
|
|
{
|
|
priv->render_id = ++last_render_id;
|
|
ass_glyph_cache_reset();
|
|
ass_bitmap_cache_reset();
|
|
ass_composite_cache_reset();
|
|
ass_free_images(priv->prev_images_root);
|
|
priv->prev_images_root = 0;
|
|
}
|
|
|
|
void ass_set_frame_size(ass_renderer_t* priv, int w, int h)
|
|
{
|
|
if (priv->settings.frame_width != w || priv->settings.frame_height != h) {
|
|
priv->settings.frame_width = w;
|
|
priv->settings.frame_height = h;
|
|
if (priv->settings.aspect == 0.)
|
|
priv->settings.aspect = ((double)w) / h;
|
|
ass_reconfigure(priv);
|
|
}
|
|
}
|
|
|
|
void ass_set_margins(ass_renderer_t* priv, int t, int b, int l, int r)
|
|
{
|
|
if (priv->settings.left_margin != l ||
|
|
priv->settings.right_margin != r ||
|
|
priv->settings.top_margin != t ||
|
|
priv->settings.bottom_margin != b) {
|
|
priv->settings.left_margin = l;
|
|
priv->settings.right_margin = r;
|
|
priv->settings.top_margin = t;
|
|
priv->settings.bottom_margin = b;
|
|
ass_reconfigure(priv);
|
|
}
|
|
}
|
|
|
|
void ass_set_use_margins(ass_renderer_t* priv, int use)
|
|
{
|
|
priv->settings.use_margins = use;
|
|
}
|
|
|
|
void ass_set_aspect_ratio(ass_renderer_t* priv, double ar)
|
|
{
|
|
if (priv->settings.aspect != ar) {
|
|
priv->settings.aspect = ar;
|
|
ass_reconfigure(priv);
|
|
}
|
|
}
|
|
|
|
void ass_set_font_scale(ass_renderer_t* priv, double font_scale)
|
|
{
|
|
if (priv->settings.font_size_coeff != font_scale) {
|
|
priv->settings.font_size_coeff = font_scale;
|
|
ass_reconfigure(priv);
|
|
}
|
|
}
|
|
|
|
void ass_set_hinting(ass_renderer_t* priv, ass_hinting_t ht)
|
|
{
|
|
if (priv->settings.hinting != ht) {
|
|
priv->settings.hinting = ht;
|
|
ass_reconfigure(priv);
|
|
}
|
|
}
|
|
|
|
void ass_set_line_spacing(ass_renderer_t* priv, double line_spacing)
|
|
{
|
|
priv->settings.line_spacing = line_spacing;
|
|
}
|
|
|
|
static int ass_set_fonts_(ass_renderer_t* priv, const char* default_font, const char* default_family, int fc)
|
|
{
|
|
if (priv->settings.default_font)
|
|
free(priv->settings.default_font);
|
|
if (priv->settings.default_family)
|
|
free(priv->settings.default_family);
|
|
|
|
priv->settings.default_font = default_font ? strdup(default_font) : 0;
|
|
priv->settings.default_family = default_family ? strdup(default_family) : 0;
|
|
|
|
if (priv->fontconfig_priv)
|
|
fontconfig_done(priv->fontconfig_priv);
|
|
priv->fontconfig_priv = fontconfig_init(priv->library, priv->ftlibrary, default_family, default_font, fc);
|
|
|
|
return !!priv->fontconfig_priv;
|
|
}
|
|
|
|
int ass_set_fonts(ass_renderer_t* priv, const char* default_font, const char* default_family)
|
|
{
|
|
return ass_set_fonts_(priv, default_font, default_family, 1);
|
|
}
|
|
|
|
int ass_set_fonts_nofc(ass_renderer_t* priv, const char* default_font, const char* default_family)
|
|
{
|
|
return ass_set_fonts_(priv, default_font, default_family, 0);
|
|
}
|
|
|
|
/**
|
|
* \brief Start a new frame
|
|
*/
|
|
static int ass_start_frame(ass_renderer_t *priv, ass_track_t* track, long long now)
|
|
{
|
|
ass_renderer = priv;
|
|
global_settings = &priv->settings;
|
|
|
|
if (!priv->settings.frame_width && !priv->settings.frame_height)
|
|
return 1; // library not initialized
|
|
|
|
if (track->n_events == 0)
|
|
return 1; // nothing to do
|
|
|
|
frame_context.ass_priv = priv;
|
|
frame_context.width = global_settings->frame_width;
|
|
frame_context.height = global_settings->frame_height;
|
|
frame_context.orig_width = global_settings->frame_width - global_settings->left_margin - global_settings->right_margin;
|
|
frame_context.orig_height = global_settings->frame_height - global_settings->top_margin - global_settings->bottom_margin;
|
|
frame_context.orig_width_nocrop = global_settings->frame_width -
|
|
FFMAX(global_settings->left_margin, 0) -
|
|
FFMAX(global_settings->right_margin, 0);
|
|
frame_context.orig_height_nocrop = global_settings->frame_height -
|
|
FFMAX(global_settings->top_margin, 0) -
|
|
FFMAX(global_settings->bottom_margin, 0);
|
|
frame_context.track = track;
|
|
frame_context.time = now;
|
|
|
|
ass_lazy_track_init();
|
|
|
|
frame_context.font_scale = global_settings->font_size_coeff *
|
|
frame_context.orig_height / frame_context.track->PlayResY;
|
|
if (frame_context.track->ScaledBorderAndShadow)
|
|
frame_context.border_scale = ((double)frame_context.orig_height) / frame_context.track->PlayResY;
|
|
else
|
|
frame_context.border_scale = 1.;
|
|
|
|
frame_context.font_scale_x = 1.;
|
|
|
|
priv->prev_images_root = priv->images_root;
|
|
priv->images_root = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cmp_event_layer(const void* p1, const void* p2)
|
|
{
|
|
ass_event_t* e1 = ((event_images_t*)p1)->event;
|
|
ass_event_t* e2 = ((event_images_t*)p2)->event;
|
|
if (e1->Layer < e2->Layer)
|
|
return -1;
|
|
if (e1->Layer > e2->Layer)
|
|
return 1;
|
|
if (e1->ReadOrder < e2->ReadOrder)
|
|
return -1;
|
|
if (e1->ReadOrder > e2->ReadOrder)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_EVENTS 100
|
|
|
|
static render_priv_t* get_render_priv(ass_event_t* event)
|
|
{
|
|
if (!event->render_priv)
|
|
event->render_priv = calloc(1, sizeof(render_priv_t));
|
|
// FIXME: check render_id
|
|
if (ass_renderer->render_id != event->render_priv->render_id) {
|
|
memset(event->render_priv, 0, sizeof(render_priv_t));
|
|
event->render_priv->render_id = ass_renderer->render_id;
|
|
}
|
|
return event->render_priv;
|
|
}
|
|
|
|
typedef struct segment_s {
|
|
int a, b; // top and height
|
|
} segment_t;
|
|
|
|
static int overlap(segment_t* s1, segment_t* s2)
|
|
{
|
|
if (s1->a >= s2->b || s2->a >= s1->b)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int cmp_segment(const void* p1, const void* p2)
|
|
{
|
|
return ((segment_t*)p1)->a - ((segment_t*)p2)->a;
|
|
}
|
|
|
|
static void shift_event(event_images_t* ei, int shift)
|
|
{
|
|
ass_image_t* cur = ei->imgs;
|
|
while (cur) {
|
|
cur->dst_y += shift;
|
|
// clip top and bottom
|
|
if (cur->dst_y < 0) {
|
|
int clip = - cur->dst_y;
|
|
cur->h -= clip;
|
|
cur->bitmap += clip * cur->stride;
|
|
cur->dst_y = 0;
|
|
}
|
|
if (cur->dst_y + cur->h >= frame_context.height) {
|
|
int clip = cur->dst_y + cur->h - frame_context.height;
|
|
cur->h -= clip;
|
|
}
|
|
if (cur->h <= 0) {
|
|
cur->h = 0;
|
|
cur->dst_y = 0;
|
|
}
|
|
cur = cur->next;
|
|
}
|
|
ei->top += shift;
|
|
}
|
|
|
|
// dir: 1 - move down
|
|
// -1 - move up
|
|
static int fit_segment(segment_t* s, segment_t* fixed, int* cnt, int dir)
|
|
{
|
|
int i;
|
|
int shift = 0;
|
|
|
|
if (dir == 1) // move down
|
|
for (i = 0; i < *cnt; ++i) {
|
|
if (s->b + shift <= fixed[i].a || s->a + shift >= fixed[i].b)
|
|
continue;
|
|
shift = fixed[i].b - s->a;
|
|
}
|
|
else // dir == -1, move up
|
|
for (i = *cnt-1; i >= 0; --i) {
|
|
if (s->b + shift <= fixed[i].a || s->a + shift >= fixed[i].b)
|
|
continue;
|
|
shift = fixed[i].a - s->b;
|
|
}
|
|
|
|
fixed[*cnt].a = s->a + shift;
|
|
fixed[*cnt].b = s->b + shift;
|
|
(*cnt)++;
|
|
qsort(fixed, *cnt, sizeof(segment_t), cmp_segment);
|
|
|
|
return shift;
|
|
}
|
|
|
|
static void fix_collisions(event_images_t* imgs, int cnt)
|
|
{
|
|
segment_t used[MAX_EVENTS];
|
|
int cnt_used = 0;
|
|
int i, j;
|
|
|
|
// fill used[] with fixed events
|
|
for (i = 0; i < cnt; ++i) {
|
|
render_priv_t* priv;
|
|
if (!imgs[i].detect_collisions) continue;
|
|
priv = get_render_priv(imgs[i].event);
|
|
if (priv->height > 0) { // it's a fixed event
|
|
segment_t s;
|
|
s.a = priv->top;
|
|
s.b = priv->top + priv->height;
|
|
if (priv->height != imgs[i].height) { // no, it's not
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_EventHeightHasChanged);
|
|
priv->top = 0;
|
|
priv->height = 0;
|
|
}
|
|
for (j = 0; j < cnt_used; ++j)
|
|
if (overlap(&s, used + j)) { // no, it's not
|
|
priv->top = 0;
|
|
priv->height = 0;
|
|
}
|
|
if (priv->height > 0) { // still a fixed event
|
|
used[cnt_used].a = priv->top;
|
|
used[cnt_used].b = priv->top + priv->height;
|
|
cnt_used ++;
|
|
shift_event(imgs + i, priv->top - imgs[i].top);
|
|
}
|
|
}
|
|
}
|
|
qsort(used, cnt_used, sizeof(segment_t), cmp_segment);
|
|
|
|
// try to fit other events in free spaces
|
|
for (i = 0; i < cnt; ++i) {
|
|
render_priv_t* priv;
|
|
if (!imgs[i].detect_collisions) continue;
|
|
priv = get_render_priv(imgs[i].event);
|
|
if (priv->height == 0) { // not a fixed event
|
|
int shift;
|
|
segment_t s;
|
|
s.a = imgs[i].top;
|
|
s.b = imgs[i].top + imgs[i].height;
|
|
shift = fit_segment(&s, used, &cnt_used, imgs[i].shift_direction);
|
|
if (shift) shift_event(imgs + i, shift);
|
|
// make it fixed
|
|
priv->top = imgs[i].top;
|
|
priv->height = imgs[i].height;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* \brief compare two images
|
|
* \param i1 first image
|
|
* \param i2 second image
|
|
* \return 0 if identical, 1 if different positions, 2 if different content
|
|
*/
|
|
int ass_image_compare(ass_image_t *i1, ass_image_t *i2)
|
|
{
|
|
if (i1->w != i2->w) return 2;
|
|
if (i1->h != i2->h) return 2;
|
|
if (i1->stride != i2->stride) return 2;
|
|
if (i1->color != i2->color) return 2;
|
|
if (i1->bitmap != i2->bitmap)
|
|
return 2;
|
|
if (i1->dst_x != i2->dst_x) return 1;
|
|
if (i1->dst_y != i2->dst_y) return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief compare current and previous image list
|
|
* \param priv library handle
|
|
* \return 0 if identical, 1 if different positions, 2 if different content
|
|
*/
|
|
int ass_detect_change(ass_renderer_t *priv)
|
|
{
|
|
ass_image_t* img, *img2;
|
|
int diff;
|
|
|
|
img = priv->prev_images_root;
|
|
img2 = priv->images_root;
|
|
diff = 0;
|
|
while (img && diff < 2) {
|
|
ass_image_t* next, *next2;
|
|
next = img->next;
|
|
if (img2) {
|
|
int d = ass_image_compare(img, img2);
|
|
if (d > diff) diff = d;
|
|
next2 = img2->next;
|
|
} else {
|
|
// previous list is shorter
|
|
diff = 2;
|
|
break;
|
|
}
|
|
img = next;
|
|
img2 = next2;
|
|
}
|
|
|
|
// is the previous list longer?
|
|
if (img2)
|
|
diff = 2;
|
|
|
|
return diff;
|
|
}
|
|
|
|
/**
|
|
* \brief render a frame
|
|
* \param priv library handle
|
|
* \param track track
|
|
* \param now current video timestamp (ms)
|
|
* \param detect_change a value describing how the new images differ from the previous ones will be written here:
|
|
* 0 if identical, 1 if different positions, 2 if different content.
|
|
* Can be NULL, in that case no detection is performed.
|
|
*/
|
|
ass_image_t* ass_render_frame(ass_renderer_t *priv, ass_track_t* track, long long now, int* detect_change)
|
|
{
|
|
int i, cnt, rc;
|
|
event_images_t* last;
|
|
ass_image_t** tail;
|
|
|
|
// init frame
|
|
rc = ass_start_frame(priv, track, now);
|
|
if (rc != 0)
|
|
return 0;
|
|
|
|
// render events separately
|
|
cnt = 0;
|
|
for (i = 0; i < track->n_events; ++i) {
|
|
ass_event_t* event = track->events + i;
|
|
if ( (event->Start <= now) && (now < (event->Start + event->Duration)) ) {
|
|
if (cnt >= priv->eimg_size) {
|
|
priv->eimg_size += 100;
|
|
priv->eimg = realloc(priv->eimg, priv->eimg_size * sizeof(event_images_t));
|
|
}
|
|
rc = ass_render_event(event, priv->eimg + cnt);
|
|
if (!rc) ++cnt;
|
|
}
|
|
}
|
|
|
|
// sort by layer
|
|
qsort(priv->eimg, cnt, sizeof(event_images_t), cmp_event_layer);
|
|
|
|
// call fix_collisions for each group of events with the same layer
|
|
last = priv->eimg;
|
|
for (i = 1; i < cnt; ++i)
|
|
if (last->event->Layer != priv->eimg[i].event->Layer) {
|
|
fix_collisions(last, priv->eimg + i - last);
|
|
last = priv->eimg + i;
|
|
}
|
|
if (cnt > 0)
|
|
fix_collisions(last, priv->eimg + cnt - last);
|
|
|
|
// concat lists
|
|
tail = &ass_renderer->images_root;
|
|
for (i = 0; i < cnt; ++i) {
|
|
ass_image_t* cur = priv->eimg[i].imgs;
|
|
while (cur) {
|
|
*tail = cur;
|
|
tail = &cur->next;
|
|
cur = cur->next;
|
|
}
|
|
}
|
|
|
|
if (detect_change)
|
|
*detect_change = ass_detect_change(priv);
|
|
|
|
// free the previous image list
|
|
ass_free_images(priv->prev_images_root);
|
|
priv->prev_images_root = 0;
|
|
|
|
return ass_renderer->images_root;
|
|
}
|
|
|