mirror of
https://github.com/mpv-player/mpv
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11d6f1fd2d
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27531 b3059339-0415-0410-9bf9-f77b7e298cf2
1131 lines
28 KiB
C
1131 lines
28 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <inttypes.h>
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#ifdef CONFIG_ICONV
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#include <iconv.h>
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#endif
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#include "ass.h"
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#include "ass_utils.h"
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#include "ass_library.h"
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#include "mputils.h"
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typedef enum {PST_UNKNOWN = 0, PST_INFO, PST_STYLES, PST_EVENTS, PST_FONTS} parser_state_t;
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struct parser_priv_s {
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parser_state_t state;
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char* fontname;
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char* fontdata;
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int fontdata_size;
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int fontdata_used;
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};
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#define ASS_STYLES_ALLOC 20
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#define ASS_EVENTS_ALLOC 200
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void ass_free_track(ass_track_t* track) {
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int i;
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if (track->parser_priv) {
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if (track->parser_priv->fontname)
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free(track->parser_priv->fontname);
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if (track->parser_priv->fontdata)
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free(track->parser_priv->fontdata);
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free(track->parser_priv);
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}
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if (track->style_format)
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free(track->style_format);
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if (track->event_format)
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free(track->event_format);
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if (track->styles) {
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for (i = 0; i < track->n_styles; ++i)
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ass_free_style(track, i);
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free(track->styles);
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}
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if (track->events) {
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for (i = 0; i < track->n_events; ++i)
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ass_free_event(track, i);
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free(track->events);
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}
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}
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/// \brief Allocate a new style struct
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/// \param track track
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/// \return style id
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int ass_alloc_style(ass_track_t* track) {
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int sid;
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assert(track->n_styles <= track->max_styles);
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if (track->n_styles == track->max_styles) {
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track->max_styles += ASS_STYLES_ALLOC;
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track->styles = (ass_style_t*)realloc(track->styles, sizeof(ass_style_t)*track->max_styles);
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}
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sid = track->n_styles++;
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memset(track->styles + sid, 0, sizeof(ass_style_t));
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return sid;
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}
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/// \brief Allocate a new event struct
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/// \param track track
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/// \return event id
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int ass_alloc_event(ass_track_t* track) {
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int eid;
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assert(track->n_events <= track->max_events);
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if (track->n_events == track->max_events) {
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track->max_events += ASS_EVENTS_ALLOC;
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track->events = (ass_event_t*)realloc(track->events, sizeof(ass_event_t)*track->max_events);
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}
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eid = track->n_events++;
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memset(track->events + eid, 0, sizeof(ass_event_t));
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return eid;
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}
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void ass_free_event(ass_track_t* track, int eid) {
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ass_event_t* event = track->events + eid;
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if (event->Name)
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free(event->Name);
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if (event->Effect)
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free(event->Effect);
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if (event->Text)
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free(event->Text);
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if (event->render_priv)
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free(event->render_priv);
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}
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void ass_free_style(ass_track_t* track, int sid) {
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ass_style_t* style = track->styles + sid;
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if (style->Name)
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free(style->Name);
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if (style->FontName)
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free(style->FontName);
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}
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// ==============================================================================================
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static void skip_spaces(char** str) {
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char* p = *str;
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while ((*p==' ') || (*p=='\t'))
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++p;
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*str = p;
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}
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static void rskip_spaces(char** str, char* limit) {
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char* p = *str;
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while ((p >= limit) && ((*p==' ') || (*p=='\t')))
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--p;
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*str = p;
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}
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/**
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* \brief find style by name
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* \param track track
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* \param name style name
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* \return index in track->styles
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* Returnes 0 if no styles found => expects at least 1 style.
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* Parsing code always adds "Default" style in the end.
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*/
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static int lookup_style(ass_track_t* track, char* name) {
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int i;
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if (*name == '*') ++name; // FIXME: what does '*' really mean ?
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for (i = track->n_styles - 1; i >= 0; --i) {
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// FIXME: mb strcasecmp ?
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if (strcmp(track->styles[i].Name, name) == 0)
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return i;
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}
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i = track->default_style;
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NoStyleNamedXFoundUsingY, track, name, track->styles[i].Name);
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return i; // use the first style
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}
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static uint32_t string2color(char* p) {
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uint32_t tmp;
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(void)strtocolor(&p, &tmp);
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return tmp;
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}
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static long long string2timecode(char* p) {
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unsigned h, m, s, ms;
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long long tm;
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int res = sscanf(p, "%1d:%2d:%2d.%2d", &h, &m, &s, &ms);
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if (res < 4) {
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mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_BadTimestamp);
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return 0;
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}
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tm = ((h * 60 + m) * 60 + s) * 1000 + ms * 10;
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return tm;
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}
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/**
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* \brief converts numpad-style align to align.
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*/
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static int numpad2align(int val) {
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int res, v;
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v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment
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if (v != 0) v = 3 - v;
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res = ((val - 1) % 3) + 1; // horizontal alignment
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res += v*4;
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return res;
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}
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#define NEXT(str,token) \
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token = next_token(&str); \
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if (!token) break;
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#define ANYVAL(name,func) \
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} else if (strcasecmp(tname, #name) == 0) { \
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target->name = func(token); \
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mp_msg(MSGT_ASS, MSGL_DBG2, "%s = %s\n", #name, token);
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#define STRVAL(name) \
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} else if (strcasecmp(tname, #name) == 0) { \
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if (target->name != NULL) free(target->name); \
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target->name = strdup(token); \
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mp_msg(MSGT_ASS, MSGL_DBG2, "%s = %s\n", #name, token);
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#define COLORVAL(name) ANYVAL(name,string2color)
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#define INTVAL(name) ANYVAL(name,atoi)
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#define FPVAL(name) ANYVAL(name,atof)
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#define TIMEVAL(name) ANYVAL(name,string2timecode)
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#define STYLEVAL(name) \
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} else if (strcasecmp(tname, #name) == 0) { \
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target->name = lookup_style(track, token); \
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mp_msg(MSGT_ASS, MSGL_DBG2, "%s = %s\n", #name, token);
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#define ALIAS(alias,name) \
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if (strcasecmp(tname, #alias) == 0) {tname = #name;}
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static char* next_token(char** str) {
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char* p = *str;
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char* start;
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skip_spaces(&p);
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if (*p == '\0') {
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*str = p;
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return 0;
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}
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start = p; // start of the token
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for (; (*p != '\0') && (*p != ','); ++p) {}
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if (*p == '\0') {
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*str = p; // eos found, str will point to '\0' at exit
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} else {
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*p = '\0';
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*str = p + 1; // ',' found, str will point to the next char (beginning of the next token)
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}
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--p; // end of current token
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rskip_spaces(&p, start);
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if (p < start)
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p = start; // empty token
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else
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++p; // the first space character, or '\0'
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*p = '\0';
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return start;
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}
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/**
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* \brief Parse the tail of Dialogue line
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* \param track track
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* \param event parsed data goes here
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* \param str string to parse, zero-terminated
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* \param n_ignored number of format options to skip at the beginning
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*/
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static int process_event_tail(ass_track_t* track, ass_event_t* event, char* str, int n_ignored)
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{
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char* token;
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char* tname;
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char* p = str;
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int i;
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ass_event_t* target = event;
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char* format = strdup(track->event_format);
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char* q = format; // format scanning pointer
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if (track->n_styles == 0) {
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// add "Default" style to the end
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// will be used if track does not contain a default style (or even does not contain styles at all)
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int sid = ass_alloc_style(track);
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track->styles[sid].Name = strdup("Default");
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track->styles[sid].FontName = strdup("Arial");
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}
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for (i = 0; i < n_ignored; ++i) {
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NEXT(q, tname);
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}
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while (1) {
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NEXT(q, tname);
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if (strcasecmp(tname, "Text") == 0) {
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char* last;
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event->Text = strdup(p);
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if (*event->Text != 0) {
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last = event->Text + strlen(event->Text) - 1;
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if (last >= event->Text && *last == '\r')
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*last = 0;
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}
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mp_msg(MSGT_ASS, MSGL_DBG2, "Text = %s\n", event->Text);
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event->Duration -= event->Start;
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free(format);
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return 0; // "Text" is always the last
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}
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NEXT(p, token);
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ALIAS(End,Duration) // temporarily store end timecode in event->Duration
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if (0) { // cool ;)
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INTVAL(Layer)
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STYLEVAL(Style)
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STRVAL(Name)
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STRVAL(Effect)
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INTVAL(MarginL)
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INTVAL(MarginR)
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INTVAL(MarginV)
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TIMEVAL(Start)
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TIMEVAL(Duration)
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}
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}
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free(format);
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return 1;
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}
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/**
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* \brief Parse command line style overrides (--ass-force-style option)
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* \param track track to apply overrides to
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* The format for overrides is [StyleName.]Field=Value
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*/
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void process_force_style(ass_track_t* track) {
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char **fs, *eq, *dt, *style, *tname, *token;
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ass_style_t* target;
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int sid;
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char** list = track->library->style_overrides;
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if (!list) return;
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for (fs = list; *fs; ++fs) {
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eq = strrchr(*fs, '=');
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if (!eq)
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continue;
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*eq = '\0';
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token = eq + 1;
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if(!strcasecmp(*fs, "PlayResX"))
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track->PlayResX = atoi(token);
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else if(!strcasecmp(*fs, "PlayResY"))
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track->PlayResY = atoi(token);
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else if(!strcasecmp(*fs, "Timer"))
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track->Timer = atof(token);
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else if(!strcasecmp(*fs, "WrapStyle"))
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track->WrapStyle = atoi(token);
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dt = strrchr(*fs, '.');
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if (dt) {
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*dt = '\0';
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style = *fs;
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tname = dt + 1;
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} else {
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style = NULL;
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tname = *fs;
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}
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for (sid = 0; sid < track->n_styles; ++sid) {
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if (style == NULL || strcasecmp(track->styles[sid].Name, style) == 0) {
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target = track->styles + sid;
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if (0) {
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STRVAL(FontName)
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COLORVAL(PrimaryColour)
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COLORVAL(SecondaryColour)
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COLORVAL(OutlineColour)
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COLORVAL(BackColour)
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FPVAL(FontSize)
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INTVAL(Bold)
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INTVAL(Italic)
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INTVAL(Underline)
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INTVAL(StrikeOut)
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FPVAL(Spacing)
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INTVAL(Angle)
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INTVAL(BorderStyle)
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INTVAL(Alignment)
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INTVAL(MarginL)
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INTVAL(MarginR)
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INTVAL(MarginV)
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INTVAL(Encoding)
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FPVAL(ScaleX)
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FPVAL(ScaleY)
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FPVAL(Outline)
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FPVAL(Shadow)
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}
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}
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}
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*eq = '=';
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if (dt) *dt = '.';
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}
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}
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/**
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* \brief Parse the Style line
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* \param track track
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* \param str string to parse, zero-terminated
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* Allocates a new style struct.
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*/
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static int process_style(ass_track_t* track, char *str)
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{
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char* token;
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char* tname;
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char* p = str;
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char* format;
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char* q; // format scanning pointer
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int sid;
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ass_style_t* style;
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ass_style_t* target;
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if (!track->style_format) {
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// no style format header
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// probably an ancient script version
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if (track->track_type == TRACK_TYPE_SSA)
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track->style_format = strdup("Name, Fontname, Fontsize, PrimaryColour, SecondaryColour,"
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"TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline,"
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"Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding");
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else
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track->style_format = strdup("Name, Fontname, Fontsize, PrimaryColour, SecondaryColour,"
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"OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut,"
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"ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow,"
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"Alignment, MarginL, MarginR, MarginV, Encoding");
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}
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q = format = strdup(track->style_format);
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mp_msg(MSGT_ASS, MSGL_V, "[%p] Style: %s\n", track, str);
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sid = ass_alloc_style(track);
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style = track->styles + sid;
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target = style;
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// fill style with some default values
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style->ScaleX = 100.;
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style->ScaleY = 100.;
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while (1) {
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NEXT(q, tname);
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NEXT(p, token);
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// ALIAS(TertiaryColour,OutlineColour) // ignore TertiaryColour; it appears only in SSA, and is overridden by BackColour
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if (0) { // cool ;)
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STRVAL(Name)
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if ((strcmp(target->Name, "Default")==0) || (strcmp(target->Name, "*Default")==0))
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track->default_style = sid;
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STRVAL(FontName)
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COLORVAL(PrimaryColour)
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COLORVAL(SecondaryColour)
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COLORVAL(OutlineColour) // TertiaryColor
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COLORVAL(BackColour)
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// SSA uses BackColour for both outline and shadow
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// this will destroy SSA's TertiaryColour, but i'm not going to use it anyway
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if (track->track_type == TRACK_TYPE_SSA)
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target->OutlineColour = target->BackColour;
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FPVAL(FontSize)
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INTVAL(Bold)
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INTVAL(Italic)
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INTVAL(Underline)
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INTVAL(StrikeOut)
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FPVAL(Spacing)
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INTVAL(Angle)
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INTVAL(BorderStyle)
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INTVAL(Alignment)
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if (track->track_type == TRACK_TYPE_ASS)
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target->Alignment = numpad2align(target->Alignment);
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INTVAL(MarginL)
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INTVAL(MarginR)
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INTVAL(MarginV)
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INTVAL(Encoding)
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FPVAL(ScaleX)
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FPVAL(ScaleY)
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FPVAL(Outline)
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FPVAL(Shadow)
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}
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}
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style->ScaleX /= 100.;
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style->ScaleY /= 100.;
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style->Bold = !!style->Bold;
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style->Italic = !!style->Italic;
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style->Underline = !!style->Underline;
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if (!style->Name)
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style->Name = strdup("Default");
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if (!style->FontName)
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style->FontName = strdup("Arial");
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// skip '@' at the start of the font name
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if (*style->FontName == '@') {
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p = style->FontName;
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style->FontName = strdup(p + 1);
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free(p);
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}
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free(format);
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return 0;
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}
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static int process_styles_line(ass_track_t* track, char *str)
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{
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if (!strncmp(str,"Format:", 7)) {
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char* p = str + 7;
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skip_spaces(&p);
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track->style_format = strdup(p);
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mp_msg(MSGT_ASS, MSGL_DBG2, "Style format: %s\n", track->style_format);
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} else if (!strncmp(str,"Style:", 6)) {
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char* p = str + 6;
|
|
skip_spaces(&p);
|
|
process_style(track, p);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int process_info_line(ass_track_t* track, char *str)
|
|
{
|
|
if (!strncmp(str, "PlayResX:", 9)) {
|
|
track->PlayResX = atoi(str + 9);
|
|
} else if (!strncmp(str,"PlayResY:", 9)) {
|
|
track->PlayResY = atoi(str + 9);
|
|
} else if (!strncmp(str,"Timer:", 6)) {
|
|
track->Timer = atof(str + 6);
|
|
} else if (!strncmp(str,"WrapStyle:", 10)) {
|
|
track->WrapStyle = atoi(str + 10);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int process_events_line(ass_track_t* track, char *str)
|
|
{
|
|
if (!strncmp(str, "Format:", 7)) {
|
|
char* p = str + 7;
|
|
skip_spaces(&p);
|
|
track->event_format = strdup(p);
|
|
mp_msg(MSGT_ASS, MSGL_DBG2, "Event format: %s\n", track->event_format);
|
|
} else if (!strncmp(str, "Dialogue:", 9)) {
|
|
// This should never be reached for embedded subtitles.
|
|
// They have slightly different format and are parsed in ass_process_chunk,
|
|
// called directly from demuxer
|
|
int eid;
|
|
ass_event_t* event;
|
|
|
|
str += 9;
|
|
skip_spaces(&str);
|
|
|
|
eid = ass_alloc_event(track);
|
|
event = track->events + eid;
|
|
|
|
process_event_tail(track, event, str, 0);
|
|
} else {
|
|
mp_msg(MSGT_ASS, MSGL_V, "Not understood: %s \n", str);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Copied from mkvtoolnix
|
|
static unsigned char* decode_chars(unsigned char c1, unsigned char c2,
|
|
unsigned char c3, unsigned char c4, unsigned char* dst, int cnt)
|
|
{
|
|
uint32_t value;
|
|
unsigned char bytes[3];
|
|
int i;
|
|
|
|
value = ((c1 - 33) << 18) + ((c2 - 33) << 12) + ((c3 - 33) << 6) + (c4 - 33);
|
|
bytes[2] = value & 0xff;
|
|
bytes[1] = (value & 0xff00) >> 8;
|
|
bytes[0] = (value & 0xff0000) >> 16;
|
|
|
|
for (i = 0; i < cnt; ++i)
|
|
*dst++ = bytes[i];
|
|
return dst;
|
|
}
|
|
|
|
static int decode_font(ass_track_t* track)
|
|
{
|
|
unsigned char* p;
|
|
unsigned char* q;
|
|
int i;
|
|
int size; // original size
|
|
int dsize; // decoded size
|
|
unsigned char* buf = 0;
|
|
|
|
mp_msg(MSGT_ASS, MSGL_V, "font: %d bytes encoded data \n", track->parser_priv->fontdata_used);
|
|
size = track->parser_priv->fontdata_used;
|
|
if (size % 4 == 1) {
|
|
mp_msg(MSGT_ASS, MSGL_ERR, MSGTR_LIBASS_BadEncodedDataSize);
|
|
goto error_decode_font;
|
|
}
|
|
buf = malloc(size / 4 * 3 + 2);
|
|
q = buf;
|
|
for (i = 0, p = (unsigned char*)track->parser_priv->fontdata; i < size / 4; i++, p+=4) {
|
|
q = decode_chars(p[0], p[1], p[2], p[3], q, 3);
|
|
}
|
|
if (size % 4 == 2) {
|
|
q = decode_chars(p[0], p[1], 0, 0, q, 1);
|
|
} else if (size % 4 == 3) {
|
|
q = decode_chars(p[0], p[1], p[2], 0, q, 2);
|
|
}
|
|
dsize = q - buf;
|
|
assert(dsize <= size / 4 * 3 + 2);
|
|
|
|
if (track->library->extract_fonts) {
|
|
ass_add_font(track->library, track->parser_priv->fontname, (char*)buf, dsize);
|
|
buf = 0;
|
|
}
|
|
|
|
error_decode_font:
|
|
if (buf) free(buf);
|
|
free(track->parser_priv->fontname);
|
|
free(track->parser_priv->fontdata);
|
|
track->parser_priv->fontname = 0;
|
|
track->parser_priv->fontdata = 0;
|
|
track->parser_priv->fontdata_size = 0;
|
|
track->parser_priv->fontdata_used = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int process_fonts_line(ass_track_t* track, char *str)
|
|
{
|
|
int len;
|
|
|
|
if (!strncmp(str, "fontname:", 9)) {
|
|
char* p = str + 9;
|
|
skip_spaces(&p);
|
|
if (track->parser_priv->fontname) {
|
|
decode_font(track);
|
|
}
|
|
track->parser_priv->fontname = strdup(p);
|
|
mp_msg(MSGT_ASS, MSGL_V, "fontname: %s\n", track->parser_priv->fontname);
|
|
return 0;
|
|
}
|
|
|
|
if (!track->parser_priv->fontname) {
|
|
mp_msg(MSGT_ASS, MSGL_V, "Not understood: %s \n", str);
|
|
return 0;
|
|
}
|
|
|
|
len = strlen(str);
|
|
if (len > 80) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FontLineTooLong, len, str);
|
|
return 0;
|
|
}
|
|
if (track->parser_priv->fontdata_used + len > track->parser_priv->fontdata_size) {
|
|
track->parser_priv->fontdata_size += 100 * 1024;
|
|
track->parser_priv->fontdata = realloc(track->parser_priv->fontdata, track->parser_priv->fontdata_size);
|
|
}
|
|
memcpy(track->parser_priv->fontdata + track->parser_priv->fontdata_used, str, len);
|
|
track->parser_priv->fontdata_used += len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Parse a header line
|
|
* \param track track
|
|
* \param str string to parse, zero-terminated
|
|
*/
|
|
static int process_line(ass_track_t* track, char *str)
|
|
{
|
|
if (!strncasecmp(str, "[Script Info]", 13)) {
|
|
track->parser_priv->state = PST_INFO;
|
|
} else if (!strncasecmp(str, "[V4 Styles]", 11)) {
|
|
track->parser_priv->state = PST_STYLES;
|
|
track->track_type = TRACK_TYPE_SSA;
|
|
} else if (!strncasecmp(str, "[V4+ Styles]", 12)) {
|
|
track->parser_priv->state = PST_STYLES;
|
|
track->track_type = TRACK_TYPE_ASS;
|
|
} else if (!strncasecmp(str, "[Events]", 8)) {
|
|
track->parser_priv->state = PST_EVENTS;
|
|
} else if (!strncasecmp(str, "[Fonts]", 7)) {
|
|
track->parser_priv->state = PST_FONTS;
|
|
} else {
|
|
switch (track->parser_priv->state) {
|
|
case PST_INFO:
|
|
process_info_line(track, str);
|
|
break;
|
|
case PST_STYLES:
|
|
process_styles_line(track, str);
|
|
break;
|
|
case PST_EVENTS:
|
|
process_events_line(track, str);
|
|
break;
|
|
case PST_FONTS:
|
|
process_fonts_line(track, str);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// there is no explicit end-of-font marker in ssa/ass
|
|
if ((track->parser_priv->state != PST_FONTS) && (track->parser_priv->fontname))
|
|
decode_font(track);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int process_text(ass_track_t* track, char* str)
|
|
{
|
|
char* p = str;
|
|
while(1) {
|
|
char* q;
|
|
while (1) {
|
|
if ((*p=='\r')||(*p=='\n')) ++p;
|
|
else if (p[0]=='\xef' && p[1]=='\xbb' && p[2]=='\xbf') p+=3; // U+FFFE (BOM)
|
|
else break;
|
|
}
|
|
for (q=p; ((*q!='\0')&&(*q!='\r')&&(*q!='\n')); ++q) {};
|
|
if (q==p)
|
|
break;
|
|
if (*q != '\0')
|
|
*(q++) = '\0';
|
|
process_line(track, p);
|
|
if (*q == '\0')
|
|
break;
|
|
p = q;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Process a chunk of subtitle stream data.
|
|
* \param track track
|
|
* \param data string to parse
|
|
* \param size length of data
|
|
*/
|
|
void ass_process_data(ass_track_t* track, char* data, int size)
|
|
{
|
|
char* str = malloc(size + 1);
|
|
|
|
memcpy(str, data, size);
|
|
str[size] = '\0';
|
|
|
|
mp_msg(MSGT_ASS, MSGL_V, "event: %s\n", str);
|
|
process_text(track, str);
|
|
free(str);
|
|
}
|
|
|
|
/**
|
|
* \brief Process CodecPrivate section of subtitle stream
|
|
* \param track track
|
|
* \param data string to parse
|
|
* \param size length of data
|
|
CodecPrivate section contains [Stream Info] and [V4+ Styles] ([V4 Styles] for SSA) sections
|
|
*/
|
|
void ass_process_codec_private(ass_track_t* track, char *data, int size)
|
|
{
|
|
ass_process_data(track, data, size);
|
|
|
|
if (!track->event_format) {
|
|
// probably an mkv produced by ancient mkvtoolnix
|
|
// such files don't have [Events] and Format: headers
|
|
track->parser_priv->state = PST_EVENTS;
|
|
if (track->track_type == TRACK_TYPE_SSA)
|
|
track->event_format = strdup("Format: Marked, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text");
|
|
else
|
|
track->event_format = strdup("Format: Layer, Start, End, Style, Actor, MarginL, MarginR, MarginV, Effect, Text");
|
|
}
|
|
|
|
process_force_style(track);
|
|
}
|
|
|
|
static int check_duplicate_event(ass_track_t* track, int ReadOrder)
|
|
{
|
|
int i;
|
|
for (i = 0; i<track->n_events - 1; ++i) // ignoring last event, it is the one we are comparing with
|
|
if (track->events[i].ReadOrder == ReadOrder)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Process a chunk of subtitle stream data. In Matroska, this contains exactly 1 event (or a commentary).
|
|
* \param track track
|
|
* \param data string to parse
|
|
* \param size length of data
|
|
* \param timecode starting time of the event (milliseconds)
|
|
* \param duration duration of the event (milliseconds)
|
|
*/
|
|
void ass_process_chunk(ass_track_t* track, char *data, int size, long long timecode, long long duration)
|
|
{
|
|
char* str;
|
|
int eid;
|
|
char* p;
|
|
char* token;
|
|
ass_event_t* event;
|
|
|
|
if (!track->event_format) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_EventFormatHeaderMissing);
|
|
return;
|
|
}
|
|
|
|
str = malloc(size + 1);
|
|
memcpy(str, data, size);
|
|
str[size] = '\0';
|
|
mp_msg(MSGT_ASS, MSGL_V, "event at %" PRId64 ", +%" PRId64 ": %s \n", (int64_t)timecode, (int64_t)duration, str);
|
|
|
|
eid = ass_alloc_event(track);
|
|
event = track->events + eid;
|
|
|
|
p = str;
|
|
|
|
do {
|
|
NEXT(p, token);
|
|
event->ReadOrder = atoi(token);
|
|
if (check_duplicate_event(track, event->ReadOrder))
|
|
break;
|
|
|
|
NEXT(p, token);
|
|
event->Layer = atoi(token);
|
|
|
|
process_event_tail(track, event, p, 3);
|
|
|
|
event->Start = timecode;
|
|
event->Duration = duration;
|
|
|
|
free(str);
|
|
return;
|
|
// dump_events(tid);
|
|
} while (0);
|
|
// some error
|
|
ass_free_event(track, eid);
|
|
track->n_events--;
|
|
free(str);
|
|
}
|
|
|
|
#ifdef CONFIG_ICONV
|
|
/** \brief recode buffer to utf-8
|
|
* constraint: codepage != 0
|
|
* \param data pointer to text buffer
|
|
* \param size buffer size
|
|
* \return a pointer to recoded buffer, caller is responsible for freeing it
|
|
**/
|
|
static char* sub_recode(char* data, size_t size, char* codepage)
|
|
{
|
|
static iconv_t icdsc = (iconv_t)(-1);
|
|
char* tocp = "UTF-8";
|
|
char* outbuf;
|
|
assert(codepage);
|
|
|
|
{
|
|
const char* cp_tmp = codepage;
|
|
#ifdef CONFIG_ENCA
|
|
char enca_lang[3], enca_fallback[100];
|
|
if (sscanf(codepage, "enca:%2s:%99s", enca_lang, enca_fallback) == 2
|
|
|| sscanf(codepage, "ENCA:%2s:%99s", enca_lang, enca_fallback) == 2) {
|
|
cp_tmp = guess_buffer_cp((unsigned char*)data, size, enca_lang, enca_fallback);
|
|
}
|
|
#endif
|
|
if ((icdsc = iconv_open (tocp, cp_tmp)) != (iconv_t)(-1)){
|
|
mp_msg(MSGT_ASS,MSGL_V,"LIBSUB: opened iconv descriptor.\n");
|
|
} else
|
|
mp_msg(MSGT_ASS,MSGL_ERR,MSGTR_LIBASS_ErrorOpeningIconvDescriptor);
|
|
}
|
|
|
|
{
|
|
size_t osize = size;
|
|
size_t ileft = size;
|
|
size_t oleft = size - 1;
|
|
char* ip;
|
|
char* op;
|
|
size_t rc;
|
|
int clear = 0;
|
|
|
|
outbuf = malloc(osize);
|
|
ip = data;
|
|
op = outbuf;
|
|
|
|
while (1) {
|
|
if (ileft)
|
|
rc = iconv(icdsc, &ip, &ileft, &op, &oleft);
|
|
else {// clear the conversion state and leave
|
|
clear = 1;
|
|
rc = iconv(icdsc, NULL, NULL, &op, &oleft);
|
|
}
|
|
if (rc == (size_t)(-1)) {
|
|
if (errno == E2BIG) {
|
|
size_t offset = op - outbuf;
|
|
outbuf = (char*)realloc(outbuf, osize + size);
|
|
op = outbuf + offset;
|
|
osize += size;
|
|
oleft += size;
|
|
} else {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorRecodingFile);
|
|
return NULL;
|
|
}
|
|
} else
|
|
if (clear)
|
|
break;
|
|
}
|
|
outbuf[osize - oleft - 1] = 0;
|
|
}
|
|
|
|
if (icdsc != (iconv_t)(-1)) {
|
|
(void)iconv_close(icdsc);
|
|
icdsc = (iconv_t)(-1);
|
|
mp_msg(MSGT_ASS,MSGL_V,"LIBSUB: closed iconv descriptor.\n");
|
|
}
|
|
|
|
return outbuf;
|
|
}
|
|
#endif // ICONV
|
|
|
|
/**
|
|
* \brief read file contents into newly allocated buffer
|
|
* \param fname file name
|
|
* \param bufsize out: file size
|
|
* \return pointer to file contents. Caller is responsible for its deallocation.
|
|
*/
|
|
static char* read_file(char* fname, size_t *bufsize)
|
|
{
|
|
int res;
|
|
long sz;
|
|
long bytes_read;
|
|
char* buf;
|
|
|
|
FILE* fp = fopen(fname, "rb");
|
|
if (!fp) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FopenFailed, fname);
|
|
return 0;
|
|
}
|
|
res = fseek(fp, 0, SEEK_END);
|
|
if (res == -1) {
|
|
mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_FseekFailed, fname);
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
sz = ftell(fp);
|
|
rewind(fp);
|
|
|
|
if (sz > 10*1024*1024) {
|
|
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_RefusingToLoadSubtitlesLargerThan10M, fname);
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
mp_msg(MSGT_ASS, MSGL_V, "file size: %ld\n", sz);
|
|
|
|
buf = malloc(sz + 1);
|
|
assert(buf);
|
|
bytes_read = 0;
|
|
do {
|
|
res = fread(buf + bytes_read, 1, sz - bytes_read, fp);
|
|
if (res <= 0) {
|
|
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_ReadFailed, errno, strerror(errno));
|
|
fclose(fp);
|
|
free(buf);
|
|
return 0;
|
|
}
|
|
bytes_read += res;
|
|
} while (sz - bytes_read > 0);
|
|
buf[sz] = '\0';
|
|
fclose(fp);
|
|
|
|
if (bufsize)
|
|
*bufsize = sz;
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* \param buf pointer to subtitle text in utf-8
|
|
*/
|
|
static ass_track_t* parse_memory(ass_library_t* library, char* buf)
|
|
{
|
|
ass_track_t* track;
|
|
int i;
|
|
|
|
track = ass_new_track(library);
|
|
|
|
// process header
|
|
process_text(track, buf);
|
|
|
|
// external SSA/ASS subs does not have ReadOrder field
|
|
for (i = 0; i < track->n_events; ++i)
|
|
track->events[i].ReadOrder = i;
|
|
|
|
// there is no explicit end-of-font marker in ssa/ass
|
|
if (track->parser_priv->fontname)
|
|
decode_font(track);
|
|
|
|
if (track->track_type == TRACK_TYPE_UNKNOWN) {
|
|
ass_free_track(track);
|
|
return 0;
|
|
}
|
|
|
|
process_force_style(track);
|
|
|
|
return track;
|
|
}
|
|
|
|
/**
|
|
* \brief Read subtitles from memory.
|
|
* \param library libass library object
|
|
* \param buf pointer to subtitles text
|
|
* \param bufsize size of buffer
|
|
* \param codepage recode buffer contents from given codepage
|
|
* \return newly allocated track
|
|
*/
|
|
ass_track_t* ass_read_memory(ass_library_t* library, char* buf, size_t bufsize, char* codepage)
|
|
{
|
|
ass_track_t* track;
|
|
int need_free = 0;
|
|
|
|
if (!buf)
|
|
return 0;
|
|
|
|
#ifdef CONFIG_ICONV
|
|
if (codepage)
|
|
buf = sub_recode(buf, bufsize, codepage);
|
|
if (!buf)
|
|
return 0;
|
|
else
|
|
need_free = 1;
|
|
#endif
|
|
track = parse_memory(library, buf);
|
|
if (need_free)
|
|
free(buf);
|
|
if (!track)
|
|
return 0;
|
|
|
|
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_AddedSubtitleFileMemory, track->n_styles, track->n_events);
|
|
return track;
|
|
}
|
|
|
|
char* read_file_recode(char* fname, char* codepage, size_t* size)
|
|
{
|
|
char* buf;
|
|
size_t bufsize;
|
|
|
|
buf = read_file(fname, &bufsize);
|
|
if (!buf)
|
|
return 0;
|
|
#ifdef CONFIG_ICONV
|
|
if (codepage) {
|
|
char* tmpbuf = sub_recode(buf, bufsize, codepage);
|
|
free(buf);
|
|
buf = tmpbuf;
|
|
}
|
|
if (!buf)
|
|
return 0;
|
|
#endif
|
|
*size = bufsize;
|
|
return buf;
|
|
}
|
|
|
|
/**
|
|
* \brief Read subtitles from file.
|
|
* \param library libass library object
|
|
* \param fname file name
|
|
* \param codepage recode buffer contents from given codepage
|
|
* \return newly allocated track
|
|
*/
|
|
ass_track_t* ass_read_file(ass_library_t* library, char* fname, char* codepage)
|
|
{
|
|
char* buf;
|
|
ass_track_t* track;
|
|
size_t bufsize;
|
|
|
|
buf = read_file_recode(fname, codepage, &bufsize);
|
|
if (!buf)
|
|
return 0;
|
|
track = parse_memory(library, buf);
|
|
free(buf);
|
|
if (!track)
|
|
return 0;
|
|
|
|
track->name = strdup(fname);
|
|
|
|
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_AddedSubtitleFileFname, fname, track->n_styles, track->n_events);
|
|
|
|
// dump_events(forced_tid);
|
|
return track;
|
|
}
|
|
|
|
/**
|
|
* \brief read styles from file into already initialized track
|
|
*/
|
|
int ass_read_styles(ass_track_t* track, char* fname, char* codepage)
|
|
{
|
|
char* buf;
|
|
parser_state_t old_state;
|
|
size_t sz;
|
|
|
|
buf = read_file(fname, &sz);
|
|
if (!buf)
|
|
return 1;
|
|
#ifdef CONFIG_ICONV
|
|
if (codepage) {
|
|
char* tmpbuf;
|
|
tmpbuf = sub_recode(buf, sz, codepage);
|
|
free(buf);
|
|
buf = tmpbuf;
|
|
}
|
|
if (!buf)
|
|
return 0;
|
|
#endif
|
|
|
|
old_state = track->parser_priv->state;
|
|
track->parser_priv->state = PST_STYLES;
|
|
process_text(track, buf);
|
|
track->parser_priv->state = old_state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
long long ass_step_sub(ass_track_t* track, long long now, int movement) {
|
|
int i;
|
|
|
|
if (movement == 0) return 0;
|
|
if (track->n_events == 0) return 0;
|
|
|
|
if (movement < 0)
|
|
for (i = 0; (i < track->n_events) && ((long long)(track->events[i].Start + track->events[i].Duration) <= now); ++i) {}
|
|
else
|
|
for (i = track->n_events - 1; (i >= 0) && ((long long)(track->events[i].Start) > now); --i) {}
|
|
|
|
// -1 and n_events are ok
|
|
assert(i >= -1); assert(i <= track->n_events);
|
|
i += movement;
|
|
if (i < 0) i = 0;
|
|
if (i >= track->n_events) i = track->n_events - 1;
|
|
return ((long long)track->events[i].Start) - now;
|
|
}
|
|
|
|
ass_track_t* ass_new_track(ass_library_t* library) {
|
|
ass_track_t* track = calloc(1, sizeof(ass_track_t));
|
|
track->library = library;
|
|
track->parser_priv = calloc(1, sizeof(parser_priv_t));
|
|
return track;
|
|
}
|
|
|