diff options
Diffstat (limited to 'libavcodec/ass.c')
| -rw-r--r-- | libavcodec/ass.c | 214 |
1 files changed, 156 insertions, 58 deletions
diff --git a/libavcodec/ass.c b/libavcodec/ass.c index 098050a..468b8bb6 100644 --- a/libavcodec/ass.c +++ b/libavcodec/ass.c @@ -1,66 +1,76 @@ /* - * SSA/ASS common funtions + * SSA/ASS common functions * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * 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" -/** - * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS. - * - * @param avctx pointer to the AVCodecContext - * @param font name of the default font face to use - * @param font_size default font size to use - * @param color default text color to use (ABGR) - * @param back_color default background color to use (ABGR) - * @param bold 1 for bold text, 0 for normal text - * @param italic 1 for italic text, 0 for normal text - * @param underline 1 for underline text, 0 for normal text - * @param alignment position of the text (left, center, top...), defined after - * the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top) - * @return >= 0 on success otherwise an error code <0 - */ -static int ass_subtitle_header(AVCodecContext *avctx, - const char *font, int font_size, - int color, int back_color, - int bold, int italic, int underline, - int alignment) +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 alignment) { - char header[512]; - - snprintf(header, sizeof(header), + 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" - "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n" - "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" + + /* 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 */ + "1,1,0," /* BorderStyle, Outline, Shadow */ + "%d,10,10,10," /* Alignment, Margin[LRV] */ + "0\r\n" /* Encoding */ + "\r\n" "[Events]\r\n" - "Format: Layer, Start, End, Text\r\n", + "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n", + !(avctx->flags & 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, alignment); - avctx->subtitle_header = av_strdup(header); if (!avctx->subtitle_header) return AVERROR(ENOMEM); avctx->subtitle_header_size = strlen(avctx->subtitle_header); @@ -69,7 +79,7 @@ static int ass_subtitle_header(AVCodecContext *avctx, int ff_ass_subtitle_header_default(AVCodecContext *avctx) { - return ass_subtitle_header(avctx, ASS_DEFAULT_FONT, + return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT, ASS_DEFAULT_FONT_SIZE, ASS_DEFAULT_COLOR, ASS_DEFAULT_BACK_COLOR, @@ -79,47 +89,135 @@ int ff_ass_subtitle_header_default(AVCodecContext *avctx) ASS_DEFAULT_ALIGNMENT); } -void ff_ass_init(AVSubtitle *sub) +static void insert_ts(AVBPrint *buf, int ts) { - memset(sub, 0, sizeof(*sub)); -} + if (ts == -1) { + av_bprintf(buf, "9:59:59.99,"); + } else { + int h, m, s; -static int ts_to_string(char *str, int strlen, int ts) -{ - int h, m, s; - h = ts/360000; ts -= 360000*h; - m = ts/ 6000; ts -= 6000*m; - s = ts/ 100; ts -= 100*s; - return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts); + 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_add_rect(AVSubtitle *sub, const char *dialog, - int ts_start, int ts_end, int raw) +int ff_ass_bprint_dialog(AVBPrint *buf, const char *dialog, + int ts_start, int duration, int raw) { - int len = 0, dlen, duration = ts_end - ts_start; - char s_start[16], s_end[16], header[48] = {0}; - AVSubtitleRect **rects; + int dlen; + + if (!raw || raw == 2) { + long int layer = 0; + + if (raw == 2) { + /* skip ReadOrder */ + dialog = strchr(dialog, ','); + if (!dialog) + return AVERROR_INVALIDDATA; + dialog++; - if (!raw) { - ts_to_string(s_start, sizeof(s_start), ts_start); - ts_to_string(s_end, sizeof(s_end), ts_end ); - len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,", - s_start, s_end); + /* 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'; - rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects)); + 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) - return AVERROR(ENOMEM); + 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])); rects[sub->num_rects]->type = SUBTITLE_ASS; - rects[sub->num_rects]->ass = av_malloc(len + dlen + 1); - strcpy (rects[sub->num_rects]->ass , header); - av_strlcpy(rects[sub->num_rects]->ass + len, dialog, dlen + 1); + 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); + } + } } |
