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author | eugeni <eugeni@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-07-07 18:26:51 +0000 |
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committer | eugeni <eugeni@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2006-07-07 18:26:51 +0000 |
commit | e15ae9a60043d8d9c1b110607c5059f13ca86421 (patch) | |
tree | 22b3b039cdc936ae7063c5fd0092c2c837292d0f /libass/ass.c | |
parent | 2f2d8cef15ccef7f2e0882a482a4fa071054778d (diff) | |
download | mpv-e15ae9a60043d8d9c1b110607c5059f13ca86421.tar.bz2 mpv-e15ae9a60043d8d9c1b110607c5059f13ca86421.tar.xz |
Initial libass release (without mencoder support).
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18942 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libass/ass.c')
-rw-r--r-- | libass/ass.c | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/libass/ass.c b/libass/ass.c new file mode 100644 index 0000000000..4f9b8908ec --- /dev/null +++ b/libass/ass.c @@ -0,0 +1,857 @@ +#include "config.h" + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <assert.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +#ifdef HAVE_ENCA +#include "subreader.h" // for guess_buffer_cp +#endif + +#ifdef USE_ICONV +#include <iconv.h> +extern char *sub_cp; +#endif + +#include "mp_msg.h" +#include "ass.h" +#include "ass_utils.h" +#include "libvo/sub.h" // for utf8_get_char + +char *get_path(char *); + +#define ASS_STYLES_ALLOC 20 +#define ASS_EVENTS_ALLOC 200 + +void ass_free_track(ass_track_t* track) { + int i; + + 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_style_t* style = track->styles + i; + if (style->Name) + free(style->Name); + if (style->FontName) + free(style->FontName); + } + free(track->styles); + } + if (track->events) { + for (i = 0; i < track->n_events; ++i) { + ass_event_t* event = track->events + i; + if (event->Name) + free(event->Name); + if (event->Effect) + free(event->Effect); + if (event->Text) + free(event->Text); + } + 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; +} + +static void free_event(ass_track_t* track, int eid) { + if (track->n_events > eid + 1) // not last event + memcpy(track->events + eid, track->events + eid + 1, sizeof(ass_event_t) * (track->n_events - eid - 1)); + track->n_events--; +} + +static int events_compare_f(const void* a_, const void* b_) { + ass_event_t* a = (ass_event_t*)a_; + ass_event_t* b = (ass_event_t*)b_; + if (a->Start < b->Start) + return -1; + else if (a->Start > b->Start) + return 1; + else + return 0; +} + +/// \brief Sort events by start time +/// \param tid track id +static void sort_events(ass_track_t* track) { + qsort(track->events, track->n_events, sizeof(ass_event_t), events_compare_f); +} + +// ============================================================================================== + +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; + 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) ANYVAL(name,strdup) +#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); + last = event->Text + strlen(event->Text) - 1; + if (*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 ;) + STYLEVAL(Style) + STRVAL(Name) + STRVAL(Effect) + INTVAL(MarginL) + INTVAL(MarginR) + INTVAL(MarginV) + TIMEVAL(Start) + TIMEVAL(Duration) + } + } + free(format); + return 1; +} + +/** + * \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; + +} + +/** + * \brief Parse a header line + * \param track track + * \param str string to parse, zero-terminated +*/ +static int process_header_line(ass_track_t* track, char *str) +{ + static int events_section_started = 0; + + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "=== Header: %s\n", str); + if (strncmp(str, "PlayResX:", 9)==0) { + track->PlayResX = atoi(str + 9); + } else if (strncmp(str,"PlayResY:", 9)==0) { + track->PlayResY = atoi(str + 9); + } else if (strncmp(str,"Timer:", 6)==0) { + track->Timer = atof(str + 6); + } else if (strstr(str,"Styles]")) { + events_section_started = 0; + if (strchr(str, '+')) + track->track_type = TRACK_TYPE_ASS; + else + track->track_type = TRACK_TYPE_SSA; + } else if (strncmp(str,"[Events]", 8)==0) { + events_section_started = 1; + } else if (strncmp(str,"Format:", 7)==0) { + char* p = str + 7; + skip_spaces(&p); + if (events_section_started) { + track->event_format = strdup(p); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "Event format: %s\n", track->event_format); + } else { + track->style_format = strdup(p); + mp_msg(MSGT_GLOBAL, MSGL_DBG2, "Style format: %s\n", track->style_format); + } + } else if (strncmp(str,"Style:", 6)==0) { + char* p = str + 6; + skip_spaces(&p); + process_style(track, p); + } else if (strncmp(str,"WrapStyle:", 10)==0) { + track->WrapStyle = atoi(str + 10); + } + 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] sections +*/ +void ass_process_chunk(ass_track_t* track, char *data, int size) +{ + char* str = malloc(size + 1); + char* p; + int sid; + + memcpy(str, data, size); + str[size] = '\0'; + + 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_header_line(track, p); + if (*q == '\0') + break; + p = q; + } + 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 + 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"); + } +} + +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_line(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, "\nline at timecode %lld, duration %lld: \n%s\n", timecode, 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 + free_event(track, eid); + free(str); +} + +/** + * \brief Process a line from external file. + * \param track track + * \param str string to parse + * \param size length of data +*/ +static void ass_process_external_line(ass_track_t* track, char *str, int size) +{ + int eid; + ass_event_t* event; + + eid = ass_alloc_event(track); + event = track->events + eid; + + if (strncmp("Dialogue:", str, 9) != 0) + return; + + str += 9; + while (*str == ' ') {++str;} + + process_event_tail(track, event, str, 0); +} + +#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 subtitles from file. + * \param fname file name + * \return newly allocated track +*/ +ass_track_t* ass_read_file(char* fname) +{ + int res; + long sz; + long bytes_read; + char* buf; + char* p; + int events_reached; + ass_track_t* track; + + 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); + if (!tmpbuf) + return 0; + buf = tmpbuf; + } +#endif + + track = ass_new_track(); + track->name = strdup(fname); + + // process header + events_reached = 0; + p = buf; + while (p && (*p)) { + while (*p == '\n') {++p;} + if (strncmp(p, "[Events]", 8) == 0) { + events_reached = 1; + } else if ((strncmp(p, "Format:", 7) == 0) && (events_reached)) { + p = strchr(p, '\n'); + if (p == 0) { + mp_msg(MSGT_GLOBAL, MSGL_WARN, "Incomplete subtitles\n"); + free(buf); + return 0; + } + ass_process_chunk(track, buf, p - buf + 1); + ++p; + break; + } + p = strchr(p, '\n'); + } + // process events + while (p && (*p)) { + char* next; + int len; + while (*p == '\n') {++p;} + next = strchr(p, '\n'); + len = 0; + if (next) { + len = next - p; + *next = 0; + } else { + len = strlen(p); + } + ass_process_external_line(track, p, len); + if (next) { + p = next + 1; + continue; + } else + break; + } + + free(buf); + + if (!events_reached) { + ass_free_track(track); + return 0; + } + + mp_msg(MSGT_GLOBAL, MSGL_INFO, "LIBASS: added subtitle file: %s (%d styles, %d events)\n", fname, track->n_styles, track->n_events); + + sort_events(track); + +// dump_events(forced_tid); + return track; +} + +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)); + return track; +} + |