yading@10: /*
yading@10:  * SSA/ASS common functions
yading@10:  * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "ass.h"
yading@10: #include "libavutil/avassert.h"
yading@10: #include "libavutil/avstring.h"
yading@10: #include "libavutil/bprint.h"
yading@10: #include "libavutil/common.h"
yading@10: 
yading@10: int ff_ass_subtitle_header(AVCodecContext *avctx,
yading@10:                            const char *font, int font_size,
yading@10:                            int color, int back_color,
yading@10:                            int bold, int italic, int underline,
yading@10:                            int alignment)
yading@10: {
yading@10:     avctx->subtitle_header = av_asprintf(
yading@10:              "[Script Info]\r\n"
yading@10:              "ScriptType: v4.00+\r\n"
yading@10:              "\r\n"
yading@10:              "[V4+ Styles]\r\n"
yading@10:              "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
yading@10:              "Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
yading@10:              "\r\n"
yading@10:              "[Events]\r\n"
yading@10:              "Format: Layer, Start, End, Style, Text\r\n",
yading@10:              font, font_size, color, color, back_color, back_color,
yading@10:              -bold, -italic, -underline, alignment);
yading@10: 
yading@10:     if (!avctx->subtitle_header)
yading@10:         return AVERROR(ENOMEM);
yading@10:     avctx->subtitle_header_size = strlen(avctx->subtitle_header);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_ass_subtitle_header_default(AVCodecContext *avctx)
yading@10: {
yading@10:     return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
yading@10:                                          ASS_DEFAULT_FONT_SIZE,
yading@10:                                          ASS_DEFAULT_COLOR,
yading@10:                                          ASS_DEFAULT_BACK_COLOR,
yading@10:                                          ASS_DEFAULT_BOLD,
yading@10:                                          ASS_DEFAULT_ITALIC,
yading@10:                                          ASS_DEFAULT_UNDERLINE,
yading@10:                                          ASS_DEFAULT_ALIGNMENT);
yading@10: }
yading@10: 
yading@10: static void insert_ts(AVBPrint *buf, int ts)
yading@10: {
yading@10:     if (ts == -1) {
yading@10:         av_bprintf(buf, "9:59:59.99,");
yading@10:     } else {
yading@10:         int h, m, s;
yading@10: 
yading@10:         h = ts/360000;  ts -= 360000*h;
yading@10:         m = ts/  6000;  ts -=   6000*m;
yading@10:         s = ts/   100;  ts -=    100*s;
yading@10:         av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
yading@10:     }
yading@10: }
yading@10: 
yading@10: int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
yading@10:                     int ts_start, int duration, int raw)
yading@10: {
yading@10:     AVBPrint buf;
yading@10:     int ret, dlen;
yading@10:     AVSubtitleRect **rects;
yading@10: 
yading@10:     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
yading@10:     if (!raw || raw == 2) {
yading@10:         long int layer = 0;
yading@10: 
yading@10:         if (raw == 2) {
yading@10:             /* skip ReadOrder */
yading@10:             dialog = strchr(dialog, ',');
yading@10:             if (!dialog)
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             dialog++;
yading@10: 
yading@10:             /* extract Layer or Marked */
yading@10:             layer = strtol(dialog, (char**)&dialog, 10);
yading@10:             if (*dialog != ',')
yading@10:                 return AVERROR_INVALIDDATA;
yading@10:             dialog++;
yading@10:         }
yading@10:         av_bprintf(&buf, "Dialogue: %ld,", layer);
yading@10:         insert_ts(&buf, ts_start);
yading@10:         insert_ts(&buf, duration == -1 ? -1 : ts_start + duration);
yading@10:         if (raw != 2)
yading@10:             av_bprintf(&buf, "Default,");
yading@10:     }
yading@10: 
yading@10:     dlen = strcspn(dialog, "\n");
yading@10:     dlen += dialog[dlen] == '\n';
yading@10: 
yading@10:     av_bprintf(&buf, "%.*s", dlen, dialog);
yading@10:     if (raw == 2)
yading@10:         av_bprintf(&buf, "\r\n");
yading@10:     if (!av_bprint_is_complete(&buf))
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
yading@10:     if (!rects)
yading@10:         return AVERROR(ENOMEM);
yading@10:     sub->rects = rects;
yading@10:     sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
yading@10:     rects[sub->num_rects]       = av_mallocz(sizeof(*rects[0]));
yading@10:     rects[sub->num_rects]->type = SUBTITLE_ASS;
yading@10:     ret = av_bprint_finalize(&buf, &rects[sub->num_rects]->ass);
yading@10:     if (ret < 0)
yading@10:         return ret;
yading@10:     sub->num_rects++;
yading@10:     return dlen;
yading@10: }