mpv/libass/ass_library.c

// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
 * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
 *
 * This file is part of libass.
 *
 * libass is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * libass is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with libass; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "ass.h"
#include "ass_library.h"


ass_library_t* ass_library_init(void)
{
	return calloc(1, sizeof(ass_library_t));
}

void ass_library_done(ass_library_t* priv)
{
	if (priv) {
		ass_set_fonts_dir(priv, NULL);
		ass_set_style_overrides(priv, NULL);
		ass_clear_fonts(priv);
		free(priv);
	}
}

void ass_set_fonts_dir(ass_library_t* priv, const char* fonts_dir)
{
	if (priv->fonts_dir)
		free(priv->fonts_dir);

	priv->fonts_dir = fonts_dir ? strdup(fonts_dir) : 0;
}

void ass_set_extract_fonts(ass_library_t* priv, int extract)
{
	priv->extract_fonts = !!extract;
}

void ass_set_style_overrides(ass_library_t* priv, char** list)
{
	char** p;
	char** q;
	int cnt;
	
	if (priv->style_overrides) {
		for (p = priv->style_overrides; *p; ++p)
			free(*p);
		free(priv->style_overrides);
	}
	
	if (!list) return;

	for (p = list, cnt = 0; *p; ++p, ++cnt) {}

	priv->style_overrides = malloc((cnt + 1) * sizeof(char*));
	for (p = list, q = priv->style_overrides; *p; ++p, ++q)
		*q = strdup(*p);
	priv->style_overrides[cnt] = NULL;
}

static void grow_array(void **array, int nelem, size_t elsize)
{
	if (!(nelem & 31))
		*array = realloc(*array, (nelem + 32) * elsize);
}

void ass_add_font(ass_library_t* priv, char* name, char* data, int size)
{
	int idx = priv->num_fontdata;
	if (!name || !data || !size)
		return;
	grow_array((void**)&priv->fontdata, priv->num_fontdata, sizeof(*priv->fontdata));
	
	priv->fontdata[idx].name = strdup(name);
	
	priv->fontdata[idx].data = malloc(size);
	memcpy(priv->fontdata[idx].data, data, size);
	
	priv->fontdata[idx].size = size;
	
	priv->num_fontdata ++;
}

void ass_clear_fonts(ass_library_t* priv)
{
	int i;
	for (i = 0; i < priv->num_fontdata; ++i) {
		free(priv->fontdata[i].name);
		free(priv->fontdata[i].data);
	}
	free(priv->fontdata);
	priv->fontdata = NULL;
	priv->num_fontdata = 0;
}