| /* |
| * SSA/ASS common functions |
| * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "avcodec.h" |
| #include "ass.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/bprint.h" |
| #include "libavutil/common.h" |
| |
| int ff_ass_subtitle_header(AVCodecContext *avctx, |
| const char *font, int font_size, |
| int color, int back_color, |
| int bold, int italic, int underline, |
| int border_style, int alignment) |
| { |
| avctx->subtitle_header = av_asprintf( |
| "[Script Info]\r\n" |
| "; Script generated by FFmpeg/Lavc%s\r\n" |
| "ScriptType: v4.00+\r\n" |
| "PlayResX: %d\r\n" |
| "PlayResY: %d\r\n" |
| "\r\n" |
| "[V4+ Styles]\r\n" |
| |
| /* ASSv4 header */ |
| "Format: Name, " |
| "Fontname, Fontsize, " |
| "PrimaryColour, SecondaryColour, OutlineColour, BackColour, " |
| "Bold, Italic, Underline, StrikeOut, " |
| "ScaleX, ScaleY, " |
| "Spacing, Angle, " |
| "BorderStyle, Outline, Shadow, " |
| "Alignment, MarginL, MarginR, MarginV, " |
| "Encoding\r\n" |
| |
| "Style: " |
| "Default," /* Name */ |
| "%s,%d," /* Font{name,size} */ |
| "&H%x,&H%x,&H%x,&H%x," /* {Primary,Secondary,Outline,Back}Colour */ |
| "%d,%d,%d,0," /* Bold, Italic, Underline, StrikeOut */ |
| "100,100," /* Scale{X,Y} */ |
| "0,0," /* Spacing, Angle */ |
| "%d,1,0," /* BorderStyle, Outline, Shadow */ |
| "%d,10,10,10," /* Alignment, Margin[LRV] */ |
| "0\r\n" /* Encoding */ |
| |
| "\r\n" |
| "[Events]\r\n" |
| "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n", |
| !(avctx->flags & AV_CODEC_FLAG_BITEXACT) ? AV_STRINGIFY(LIBAVCODEC_VERSION) : "", |
| ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY, |
| font, font_size, color, color, back_color, back_color, |
| -bold, -italic, -underline, border_style, alignment); |
| |
| if (!avctx->subtitle_header) |
| return AVERROR(ENOMEM); |
| avctx->subtitle_header_size = strlen(avctx->subtitle_header); |
| return 0; |
| } |
| |
| int ff_ass_subtitle_header_default(AVCodecContext *avctx) |
| { |
| return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT, |
| ASS_DEFAULT_FONT_SIZE, |
| ASS_DEFAULT_COLOR, |
| ASS_DEFAULT_BACK_COLOR, |
| ASS_DEFAULT_BOLD, |
| ASS_DEFAULT_ITALIC, |
| ASS_DEFAULT_UNDERLINE, |
| ASS_DEFAULT_BORDERSTYLE, |
| ASS_DEFAULT_ALIGNMENT); |
| } |
| |
| static void insert_ts(AVBPrint *buf, int ts) |
| { |
| if (ts == -1) { |
| av_bprintf(buf, "9:59:59.99,"); |
| } else { |
| int h, m, s; |
| |
| h = ts/360000; ts -= 360000*h; |
| m = ts/ 6000; ts -= 6000*m; |
| s = ts/ 100; ts -= 100*s; |
| av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts); |
| } |
| } |
| |
| int ff_ass_bprint_dialog(AVBPrint *buf, const char *dialog, |
| int ts_start, int duration, int raw) |
| { |
| int dlen; |
| |
| if (!raw || raw == 2) { |
| long int layer = 0; |
| |
| if (raw == 2) { |
| /* skip ReadOrder */ |
| dialog = strchr(dialog, ','); |
| if (!dialog) |
| return AVERROR_INVALIDDATA; |
| dialog++; |
| |
| /* extract Layer or Marked */ |
| layer = strtol(dialog, (char**)&dialog, 10); |
| if (*dialog != ',') |
| return AVERROR_INVALIDDATA; |
| dialog++; |
| } |
| av_bprintf(buf, "Dialogue: %ld,", layer); |
| insert_ts(buf, ts_start); |
| insert_ts(buf, duration == -1 ? -1 : ts_start + duration); |
| if (raw != 2) |
| av_bprintf(buf, "Default,,0,0,0,,"); |
| } |
| |
| dlen = strcspn(dialog, "\n"); |
| dlen += dialog[dlen] == '\n'; |
| |
| av_bprintf(buf, "%.*s", dlen, dialog); |
| if (raw == 2) |
| av_bprintf(buf, "\r\n"); |
| |
| return dlen; |
| } |
| |
| int ff_ass_add_rect(AVSubtitle *sub, const char *dialog, |
| int ts_start, int duration, int raw) |
| { |
| AVBPrint buf; |
| int ret, dlen; |
| AVSubtitleRect **rects; |
| |
| av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); |
| if ((ret = ff_ass_bprint_dialog(&buf, dialog, ts_start, duration, raw)) < 0) |
| goto err; |
| dlen = ret; |
| if (!av_bprint_is_complete(&buf)) |
| goto errnomem; |
| |
| rects = av_realloc_array(sub->rects, (sub->num_rects+1), sizeof(*sub->rects)); |
| if (!rects) |
| goto errnomem; |
| sub->rects = rects; |
| sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration); |
| rects[sub->num_rects] = av_mallocz(sizeof(*rects[0])); |
| if (!rects[sub->num_rects]) |
| goto errnomem; |
| rects[sub->num_rects]->type = SUBTITLE_ASS; |
| ret = av_bprint_finalize(&buf, &rects[sub->num_rects]->ass); |
| if (ret < 0) |
| goto err; |
| sub->num_rects++; |
| return dlen; |
| |
| errnomem: |
| ret = AVERROR(ENOMEM); |
| err: |
| av_bprint_finalize(&buf, NULL); |
| return ret; |
| } |
| |
| int ff_ass_add_rect_bprint(AVSubtitle *sub, AVBPrint *buf, |
| int ts_start, int duration) |
| { |
| av_bprintf(buf, "\r\n"); |
| if (!av_bprint_is_complete(buf)) |
| return AVERROR(ENOMEM); |
| return ff_ass_add_rect(sub, buf->str, ts_start, duration, 0); |
| } |
| |
| void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size, |
| const char *linebreaks, int keep_ass_markup) |
| { |
| const char *p_end = p + size; |
| |
| for (; p < p_end && *p; p++) { |
| |
| /* forced custom line breaks, not accounted as "normal" EOL */ |
| if (linebreaks && strchr(linebreaks, *p)) { |
| av_bprintf(buf, "\\N"); |
| |
| /* standard ASS escaping so random characters don't get mis-interpreted |
| * as ASS */ |
| } else if (!keep_ass_markup && strchr("{}\\", *p)) { |
| av_bprintf(buf, "\\%c", *p); |
| |
| /* some packets might end abruptly (no \0 at the end, like for example |
| * in some cases of demuxing from a classic video container), some |
| * might be terminated with \n or \r\n which we have to remove (for |
| * consistency with those who haven't), and we also have to deal with |
| * evil cases such as \r at the end of the buffer (and no \0 terminated |
| * character) */ |
| } else if (p[0] == '\n') { |
| /* some stuff left so we can insert a line break */ |
| if (p < p_end - 1) |
| av_bprintf(buf, "\\N"); |
| } else if (p[0] == '\r' && p < p_end - 1 && p[1] == '\n') { |
| /* \r followed by a \n, we can skip it. We don't insert the \N yet |
| * because we don't know if it is followed by more text */ |
| continue; |
| |
| /* finally, a sane character */ |
| } else { |
| av_bprint_chars(buf, *p, 1); |
| } |
| } |
| } |
