// -*- 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 program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <inttypes.h> #ifdef HAVE_ENCA #include "subreader.h" // for guess_buffer_cp #endif #ifdef USE_ICONV #include <iconv.h> extern char *sub_cp; #endif extern int extract_embedded_fonts; extern char** ass_force_style_list; #include "mp_msg.h" #include "ass.h" #include "ass_utils.h" #include "libvo/sub.h" // for utf8_get_char char *get_path(char *); typedef enum {PST_UNKNOWN = 0, PST_INFO, PST_STYLES, PST_EVENTS, PST_FONTS} parser_state_t; struct parser_priv_s { parser_state_t state; char* fontname; char* fontdata; int fontdata_size; int fontdata_used; }; #define ASS_STYLES_ALLOC 20 #define ASS_EVENTS_ALLOC 200 void ass_free_track(ass_track_t* track) { int i; if (track->parser_priv) { if (track->parser_priv->fontname) free(track->parser_priv->fontname); if (track->parser_priv->fontdata) free(track->parser_priv->fontdata); free(track->parser_priv); } if (track->style_format) free(track->style_format); if (track->event_format) free(track->event_format); if (track->styles) { for (i = 0; i < track->n_styles; ++i) ass_free_style(track, i); free(track->styles); } if (track->events) { for (i = 0; i < track->n_events; ++i) ass_free_event(track, i); free(track->events); } } /// \brief Allocate a new style struct /// \param track track /// \return style id int ass_alloc_style(ass_track_t* track) { int sid; assert(track->n_styles <= track->max_styles); if (track->n_styles == track->max_styles) { track->max_styles += ASS_STYLES_ALLOC; track->styles = (ass_style_t*)realloc(track->styles, sizeof(ass_style_t)*track->max_styles); } sid = track->n_styles++; memset(track->styles + sid, 0, sizeof(ass_style_t)); return sid; } /// \brief Allocate a new event struct /// \param track track /// \return event id int ass_alloc_event(ass_track_t* track) { int eid; assert(track->n_events <= track->max_events); if (track->n_events == track->max_events) { track->max_events += ASS_EVENTS_ALLOC; track->events = (ass_event_t*)realloc(track->events, sizeof(ass_event_t)*track->max_events); } eid = track->n_events++; memset(track->events + eid, 0, sizeof(ass_event_t)); return eid; } void ass_free_event(ass_track_t* track, int eid) { ass_event_t* event = track->events + eid; if (event->Name) free(event->Name); if (event->Effect) free(event->Effect); if (event->Text) free(event->Text); if (event->render_priv) free(event->render_priv); } void ass_free_style(ass_track_t* track, int sid) { ass_style_t* style = track->styles + sid; if (style->Name) free(style->Name); if (style->FontName) free(style->FontName); } // ============================================================================================== static void skip_spaces(char** str) { char* p = *str; while ((*p==' ') || (*p=='\t')) ++p; *str = p; } static void rskip_spaces(char** str, char* limit) { char* p = *str; while ((p >= limit) && ((*p==' ') || (*p=='\t'))) --p; *str = p; } /** * \brief find style by name * \param track track * \param name style name * \return index in track->styles * Returnes 0 if no styles found => expects at least 1 style. * Parsing code always adds "Default" style in the end. */ static int lookup_style(ass_track_t* track, char* name) { int i; if (*name == '*') ++name; // FIXME: what does '*' really mean ? for (i=0; i<track->n_styles; ++i) { // FIXME: mb strcasecmp ? if (strcmp(track->styles[i].Name, name) == 0) return i; } i = track->default_style; mp_msg(MSGT_GLOBAL, MSGL_WARN, "[%p] Warning: no style named '%s' found, using '%s'\n", track, name, track->styles[i].Name); return i; // use the first style } static uint32_t string2color(char* p) { uint32_t tmp; (void)strtocolor(&p, &tmp); return tmp; } static long long string2timecode(char* p) { unsigned h, m, s, ms; long long tm; int res = sscanf(p, "%1d:%2d:%2d.%2d", &h, &m, &s, &ms); if (res < 4) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "bad timestamp\n"); return 0; } tm = ((h * 60 + m) * 60 + s) * 1000 + ms * 10; return tm; } /** * \brief converts numpad-style align to align. */ static int numpad2align(int val) { int res, v; v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment if (v != 0) v = 3 - v; res = ((val - 1) % 3) + 1; // horizontal alignment res += v*4; return res; } #define NEXT(str,token) \ token = next_token(&str); \ if (!token) break; #define ANYVAL(name,func) \ } else if (strcasecmp(tname, #name) == 0) { \ target->name = func(token); \ mp_msg(MSGT_GLOBAL, MSGL_DBG2, "%s = %s\n", #name, token); #define STRVAL(name) \ } else if (strcasecmp(tname, #name) == 0) { \ if (target->name != NULL) free(target->name); \ target->name = strdup(token); \ mp_msg(MSGT_GLOBAL, MSGL_DBG2, "%s = %s\n", #name, token); #define COLORVAL(name) ANYVAL(name,string2color) #define INTVAL(name) ANYVAL(name,atoi) #define FPVAL(name) ANYVAL(name,atof) #define TIMEVAL(name) ANYVAL(name,string2timecode) #define STYLEVAL(name) \ } else if (strcasecmp(tname, #name) == 0) { \ target->name = lookup_style(track, token); \ mp_msg(MSGT_GLOBAL, MSGL_DBG2, "%s = %s\n", #name, token); #define ALIAS(alias,name) \ if (strcasecmp(tname, #alias) == 0) {tname = #name;} static char* next_token(char** str) { char* p = *str; char* start; skip_spaces(&p); if (*p == '\0') { *str = p; return 0; } start = p; // start of the token for (; (*p != '\0') && (*p != ','); ++p) {} if (*p == '\0') { *str = p; // eos found, str will point to '\0' at exit } else { *p = '\0'; *str = p + 1; // ',' found, str will point to the next char (beginning of the next token) } --p; // end of current token rskip_spaces(&p, start); if (p < start) p = start; // empty token else ++p; // the first space character, or '\0' *p = '\0'; return start; } /** * \brief Parse the tail of Dialogue line * \param track track * \param event parsed data goes here * \param str string to parse, zero-terminated * \param n_ignored number of format options to skip at the beginning */ static int process_event_tail(ass_track_t* track, ass_event_t* event, char* str, int n_ignored) { char* token; char* tname; char* p = str; int i; ass_event_t* target = event; char* format = strdup(track->event_format); char* q = format; // format scanning pointer for (i = 0; i < n_ignored; ++i) { NEXT(q, tname); } while (1) { NEXT(q, tname); if (strcasecmp(tname, "Text") == 0) { char* last; event->Text = strdup(p); if (*event->Text != 0) { last = event->Text + strlen(event->Text) - 1; if (last >= event->Text && *last == '\r') *last = 0; } mp_msg(MSGT_GLOBAL, MSGL_DBG2, "Text = %s\n", event->Text); event->Duration -= event->Start; free(format); return 0; // "Text" is always the last } NEXT(p, token); ALIAS(End,Duration) // temporarily store end timecode in event->Duration if (0) { // cool ;) INTVAL(Layer) STYLEVAL(Style) STRVAL(Name) STRVAL(Effect) INTVAL(MarginL) INTVAL(MarginR) INTVAL(MarginV) TIMEVAL(Start) TIMEVAL(Duration) } } free(format); return 1; } /** * \brief Parse command line style overrides (--ass-force-style option) * \param track track to apply overrides to * The format for overrides is [StyleName.]Field=Value */ void process_force_style(ass_track_t* track) { char **fs, *eq, *dt, *style, *tname, *token; ass_style_t* target; int sid; if (!ass_force_style_list) return; for (fs = ass_force_style_list; *fs; ++fs) { eq = strchr(*fs, '='); if (!eq) continue; *eq = '\0'; token = eq + 1; dt = strchr(*fs, '.'); if (dt) { *dt = '\0'; style = *fs; tname = dt + 1; } else { style = NULL; tname = *fs; } for (sid = 0; sid < track->n_styles; ++sid) { if (style == NULL || strcasecmp(track->styles[sid].Name, style) == 0) { target = track->styles + sid; if (0) { STRVAL(FontName) COLORVAL(PrimaryColour) COLORVAL(SecondaryColour) COLORVAL(OutlineColour) COLORVAL(BackColour) INTVAL(FontSize) INTVAL(Bold) INTVAL(Italic) INTVAL(Underline) INTVAL(StrikeOut) INTVAL(Spacing) INTVAL(Angle) INTVAL(BorderStyle) INTVAL(Alignment) INTVAL(MarginL) INTVAL(MarginR) INTVAL(MarginV) INTVAL(Encoding) FPVAL(ScaleX) FPVAL(ScaleY) FPVAL(Outline) FPVAL(Shadow) } } } *eq = '='; if (dt) *dt = '.'; } } /** * \brief Parse the Style line * \param track track * \param str string to parse, zero-terminated * Allocates a new style struct. */ static int process_style(ass_track_t* track, char *str) { char* token; char* tname; char* p = str; char* format; char* q; // format scanning pointer int sid; ass_style_t* style; ass_style_t* target; if (!track->style_format) { // no style format header // probably an ancient script version if (track->track_type == TRACK_TYPE_SSA) track->style_format = strdup("Name, Fontname, Fontsize, PrimaryColour, SecondaryColour," "TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline," "Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding"); else track->style_format = strdup("Name, Fontname, Fontsize, PrimaryColour, SecondaryColour," "OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut," "ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow," "Alignment, MarginL, MarginR, MarginV, Encoding"); } q = format = strdup(track->style_format); mp_msg(MSGT_GLOBAL, MSGL_V, "[%p] Style: %s\n", track, str); sid = ass_alloc_style(track); style = track->styles + sid; target = style; // fill style with some default values style->ScaleX = 100.; style->ScaleY = 100.; while (1) { NEXT(q, tname); NEXT(p, token); // ALIAS(TertiaryColour,OutlineColour) // ignore TertiaryColour; it appears only in SSA, and is overridden by BackColour if (0) { // cool ;) STRVAL(Name) if ((strcmp(target->Name, "Default")==0) || (strcmp(target->Name, "*Default")==0)) track->default_style = sid; STRVAL(FontName) COLORVAL(PrimaryColour) COLORVAL(SecondaryColour) COLORVAL(OutlineColour) // TertiaryColor COLORVAL(BackColour) // SSA uses BackColour for both outline and shadow // this will destroy SSA's TertiaryColour, but i'm not going to use it anyway if (track->track_type == TRACK_TYPE_SSA) target->OutlineColour = target->BackColour; INTVAL(FontSize) INTVAL(Bold) INTVAL(Italic) INTVAL(Underline) INTVAL(StrikeOut) INTVAL(Spacing) INTVAL(Angle) INTVAL(BorderStyle) INTVAL(Alignment) if (track->track_type == TRACK_TYPE_ASS) target->Alignment = numpad2align(target->Alignment); INTVAL(MarginL) INTVAL(MarginR) INTVAL(MarginV) INTVAL(Encoding) FPVAL(ScaleX) FPVAL(ScaleY) FPVAL(Outline) FPVAL(Shadow) } } style->ScaleX /= 100.; style->ScaleY /= 100.; if (!style->Name) style->Name = strdup("Default"); if (!style->FontName) style->FontName = strdup("Arial"); free(format); return 0; } static int process_styles_line(ass_track_t* track, char *str) { if (!strncmp(str,"Format:", 7)) { char* p = str + 7; skip_spaces(&p); track->style_format = strdup(p); mp_msg(MSGT_GLOBAL, MSGL_DBG2, "Style format: %s\n", track->style_format); } else if (!strncmp(str,"Style:", 6)) { 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_GLOBAL, 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_GLOBAL, 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_GLOBAL, 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_GLOBAL, MSGL_ERR, "bad encoded data size\n"); 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 (extract_embedded_fonts) ass_process_font(track->parser_priv->fontname, (char*)buf, dsize); 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 char* validate_fname(char* name); 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 = validate_fname(p); mp_msg(MSGT_GLOBAL, MSGL_V, "fontname: %s\n", track->parser_priv->fontname); return 0; } if (!track->parser_priv->fontname) { mp_msg(MSGT_GLOBAL, MSGL_V, "Not understood: %s \n", str); return 0; } len = strlen(str); if (len > 80) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "Font line too long: %d, %s\n", 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 (strstr(str, "[Script Info]")) { // FIXME: strstr to skip possible BOM at the beginning of the script track->parser_priv->state = PST_INFO; } else if (!strncmp(str, "[V4 Styles]", 11)) { track->parser_priv->state = PST_STYLES; track->track_type = TRACK_TYPE_SSA; } else if (!strncmp(str, "[V4+ Styles]", 12)) { track->parser_priv->state = PST_STYLES; track->track_type = TRACK_TYPE_ASS; } else if (!strncmp(str, "[Events]", 8)) { track->parser_priv->state = PST_EVENTS; } else if (!strncmp(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; for (;((*p=='\r')||(*p=='\n'));++p) {} 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 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) { char* str = malloc(size + 1); int sid; memcpy(str, data, size); str[size] = '\0'; process_text(track, str); free(str); // add "Default" style to the end // will be used if track does not contain a default style (or even does not contain styles at all) sid = ass_alloc_style(track); track->styles[sid].Name = strdup("Default"); track->styles[sid].FontName = strdup("Arial"); 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 containes 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_GLOBAL, MSGL_WARN, "Event format header missing\n"); return; } str = malloc(size + 1); memcpy(str, data, size); str[size] = '\0'; mp_msg(MSGT_GLOBAL, 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 USE_ICONV /** \brief recode buffer to utf-8 * constraint: sub_cp != 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) { static iconv_t icdsc = (iconv_t)(-1); char* tocp = "UTF-8"; char* outbuf; assert(sub_cp); { char* cp_tmp = sub_cp; #ifdef HAVE_ENCA char enca_lang[3], enca_fallback[100]; if (sscanf(sub_cp, "enca:%2s:%99s", enca_lang, enca_fallback) == 2 || sscanf(sub_cp, "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_SUBREADER,MSGL_V,"LIBSUB: opened iconv descriptor.\n"); } else mp_msg(MSGT_SUBREADER,MSGL_ERR,"LIBSUB: error opening iconv descriptor.\n"); #ifdef HAVE_ENCA if (cp_tmp) free(cp_tmp); #endif } { size_t osize = size; size_t ileft = size; size_t oleft = size - 1; char* ip; char* op; size_t rc; outbuf = malloc(size); ip = data; op = outbuf; while (ileft) { rc = iconv(icdsc, &ip, &ileft, &op, &oleft); if (rc == (size_t)(-1)) { if (errno == E2BIG) { int offset = op - outbuf; outbuf = (char*)realloc(outbuf, osize + size); op = outbuf + offset; osize += size; oleft += size; } else { mp_msg(MSGT_SUBREADER, MSGL_WARN, "LIBSUB: error recoding file.\n"); return NULL; } } } outbuf[osize - oleft - 1] = 0; } if (icdsc != (iconv_t)(-1)) { (void)iconv_close(icdsc); icdsc = (iconv_t)(-1); mp_msg(MSGT_SUBREADER,MSGL_V,"LIBSUB: closed iconv descriptor.\n"); } return outbuf; } #endif // ICONV /** * \brief read file contents into newly allocated buffer, recoding to utf-8 */ static char* read_file(char* fname) { int res; long sz; long bytes_read; char* buf; FILE* fp = fopen(fname, "rb"); if (!fp) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "ass_read_file(%s): fopen failed\n", fname); return 0; } res = fseek(fp, 0, SEEK_END); if (res == -1) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "ass_read_file(%s): fseek failed\n", fname); fclose(fp); return 0; } sz = ftell(fp); rewind(fp); if (sz > 10*1024*1024) { mp_msg(MSGT_GLOBAL, MSGL_INFO, "ass_read_file(%s): Refusing to load subtitles larger than 10M\n", fname); fclose(fp); return 0; } mp_msg(MSGT_GLOBAL, 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_GLOBAL, MSGL_INFO, "Read failed, %d: %s\n", errno, strerror(errno)); fclose(fp); free(buf); return 0; } bytes_read += res; } while (sz - bytes_read > 0); buf[sz] = '\0'; fclose(fp); #ifdef USE_ICONV if (sub_cp) { char* tmpbuf = sub_recode(buf, sz); free(buf); buf = tmpbuf; } #endif return buf; } /** * \brief Read subtitles from file. * \param fname file name * \return newly allocated track */ ass_track_t* ass_read_file(char* fname) { char* buf; ass_track_t* track; int i; buf = read_file(fname); if (!buf) return 0; track = ass_new_track(); track->name = strdup(fname); // 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); free(buf); if (track->track_type == TRACK_TYPE_UNKNOWN) { ass_free_track(track); return 0; } process_force_style(track); mp_msg(MSGT_GLOBAL, MSGL_INFO, "LIBASS: added subtitle file: %s (%d styles, %d events)\n", 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* buf; parser_state_t old_state; buf = read_file(fname); if (!buf) return 1; old_state = track->parser_priv->state; track->parser_priv->state = PST_STYLES; process_text(track, buf); track->parser_priv->state = old_state; return 0; } static char* validate_fname(char* name) { char* fname; char* p; char* q; unsigned code; int sz = strlen(name); q = fname = malloc(sz + 1); p = name; while (*p) { code = utf8_get_char(&p); if (code == 0) break; if ( (code > 0x7F) || (code == '\\') || (code == '/') || (code == ':') || (code == '*') || (code == '?') || (code == '<') || (code == '>') || (code == '|') || (code == 0)) { *q++ = '_'; } else { *q++ = code; } if (p - name > sz) break; } *q = 0; return fname; } /** * \brief Process embedded matroska font. Saves it to ~/.mplayer/fonts. * \param name attachment name * \param data binary font data * \param data_size data size */ void ass_process_font(const char* name, char* data, int data_size) { char buf[1000]; FILE* fp = 0; int rc; struct stat st; char* fname; char* fonts_dir = get_path("fonts"); rc = stat(fonts_dir, &st); if (rc) { int res; #ifndef __MINGW32__ res = mkdir(fonts_dir, 0700); #else res = mkdir(fonts_dir); #endif if (res) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "Failed to create: %s\n", fonts_dir); } } else if (!S_ISDIR(st.st_mode)) { mp_msg(MSGT_GLOBAL, MSGL_WARN, "Not a directory: %s\n", fonts_dir); } fname = validate_fname((char*)name); snprintf(buf, 1000, "%s/%s", fonts_dir, fname); free(fname); free(fonts_dir); fp = fopen(buf, "wb"); if (!fp) return; fwrite(data, data_size, 1, fp); fclose(fp); } 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(void) { ass_track_t* track = calloc(1, sizeof(ass_track_t)); track->parser_priv = calloc(1, sizeof(parser_priv_t)); return track; }