| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SSA/ASS common functions | ||
| 3 | * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "avcodec.h" | ||
| 23 | #include "ass.h" | ||
| 24 | #include "libavutil/avstring.h" | ||
| 25 | #include "libavutil/bprint.h" | ||
| 26 | #include "libavutil/mem.h" | ||
| 27 | #include "version.h" | ||
| 28 | |||
| 29 | 93 | int ff_ass_subtitle_header_full(AVCodecContext *avctx, | |
| 30 | int play_res_x, int play_res_y, | ||
| 31 | const char *font, int font_size, | ||
| 32 | int primary_color, int secondary_color, | ||
| 33 | int outline_color, int back_color, | ||
| 34 | int bold, int italic, int underline, | ||
| 35 | int border_style, int alignment) | ||
| 36 | { | ||
| 37 | 93 | avctx->subtitle_header = av_asprintf( | |
| 38 | "[Script Info]\n" | ||
| 39 | "; Script generated by FFmpeg/Lavc%s\n" | ||
| 40 | "ScriptType: v4.00+\n" | ||
| 41 | "PlayResX: %d\n" | ||
| 42 | "PlayResY: %d\n" | ||
| 43 | "ScaledBorderAndShadow: yes\n" | ||
| 44 | "YCbCr Matrix: None\n" | ||
| 45 | "\n" | ||
| 46 | "[V4+ Styles]\n" | ||
| 47 | |||
| 48 | /* ASS (v4+) header */ | ||
| 49 | "Format: Name, " | ||
| 50 | "Fontname, Fontsize, " | ||
| 51 | "PrimaryColour, SecondaryColour, OutlineColour, BackColour, " | ||
| 52 | "Bold, Italic, Underline, StrikeOut, " | ||
| 53 | "ScaleX, ScaleY, " | ||
| 54 | "Spacing, Angle, " | ||
| 55 | "BorderStyle, Outline, Shadow, " | ||
| 56 | "Alignment, MarginL, MarginR, MarginV, " | ||
| 57 | "Encoding\n" | ||
| 58 | |||
| 59 | "Style: " | ||
| 60 | "Default," /* Name */ | ||
| 61 | "%s,%d," /* Font{name,size} */ | ||
| 62 | "&H%x,&H%x,&H%x,&H%x," /* {Primary,Secondary,Outline,Back}Colour */ | ||
| 63 | "%d,%d,%d,0," /* Bold, Italic, Underline, StrikeOut */ | ||
| 64 | "100,100," /* Scale{X,Y} */ | ||
| 65 | "0,0," /* Spacing, Angle */ | ||
| 66 | "%d,1,0," /* BorderStyle, Outline, Shadow */ | ||
| 67 | "%d,10,10,10," /* Alignment, Margin[LRV] */ | ||
| 68 | "1\n" /* Encoding */ | ||
| 69 | |||
| 70 | "\n" | ||
| 71 | "[Events]\n" | ||
| 72 | "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\n", | ||
| 73 |
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93 | !(avctx->flags & AV_CODEC_FLAG_BITEXACT) ? AV_STRINGIFY(LIBAVCODEC_VERSION) : "", |
| 74 | play_res_x, play_res_y, font, font_size, | ||
| 75 | primary_color, secondary_color, outline_color, back_color, | ||
| 76 | -bold, -italic, -underline, border_style, alignment); | ||
| 77 | |||
| 78 |
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93 | if (!avctx->subtitle_header) |
| 79 | ✗ | return AVERROR(ENOMEM); | |
| 80 | 93 | avctx->subtitle_header_size = strlen(avctx->subtitle_header); | |
| 81 | 93 | return 0; | |
| 82 | } | ||
| 83 | |||
| 84 | 87 | int ff_ass_subtitle_header(AVCodecContext *avctx, | |
| 85 | const char *font, int font_size, | ||
| 86 | int color, int back_color, | ||
| 87 | int bold, int italic, int underline, | ||
| 88 | int border_style, int alignment) | ||
| 89 | { | ||
| 90 | 87 | return ff_ass_subtitle_header_full(avctx, | |
| 91 | ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY, | ||
| 92 | font, font_size, color, color, | ||
| 93 | back_color, back_color, | ||
| 94 | bold, italic, underline, | ||
| 95 | border_style, alignment); | ||
| 96 | } | ||
| 97 | |||
| 98 | 68 | int ff_ass_subtitle_header_default(AVCodecContext *avctx) | |
| 99 | { | ||
| 100 | 68 | return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT, | |
| 101 | ASS_DEFAULT_FONT_SIZE, | ||
| 102 | ASS_DEFAULT_COLOR, | ||
| 103 | ASS_DEFAULT_BACK_COLOR, | ||
| 104 | ASS_DEFAULT_BOLD, | ||
| 105 | ASS_DEFAULT_ITALIC, | ||
| 106 | ASS_DEFAULT_UNDERLINE, | ||
| 107 | ASS_DEFAULT_BORDERSTYLE, | ||
| 108 | ASS_DEFAULT_ALIGNMENT); | ||
| 109 | } | ||
| 110 | |||
| 111 | 692 | char *ff_ass_get_dialog(int readorder, int layer, const char *style, | |
| 112 | const char *speaker, const char *text) | ||
| 113 | { | ||
| 114 |
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692 | return av_asprintf("%d,%d,%s,%s,0,0,0,,%s", |
| 115 | readorder, layer, style ? style : "Default", | ||
| 116 | speaker ? speaker : "", text); | ||
| 117 | } | ||
| 118 | |||
| 119 | 692 | int ff_ass_add_rect2(AVSubtitle *sub, const char *dialog, | |
| 120 | int readorder, int layer, const char *style, | ||
| 121 | const char *speaker, unsigned *nb_rect_allocated) | ||
| 122 | { | ||
| 123 | 692 | AVSubtitleRect **rects = sub->rects, *rect; | |
| 124 | char *ass_str; | ||
| 125 | 692 | uint64_t new_nb = 0; | |
| 126 | |||
| 127 |
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692 | if (sub->num_rects >= UINT_MAX) |
| 128 | ✗ | return AVERROR(ENOMEM); | |
| 129 | |||
| 130 |
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692 | if (nb_rect_allocated && *nb_rect_allocated <= sub->num_rects) { |
| 131 |
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121 | if (sub->num_rects < UINT_MAX / 17 * 16) { |
| 132 | 121 | new_nb = sub->num_rects + sub->num_rects/16 + 1; | |
| 133 | } else | ||
| 134 | ✗ | new_nb = UINT_MAX; | |
| 135 |
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571 | } else if (!nb_rect_allocated) |
| 136 | 571 | new_nb = sub->num_rects + 1; | |
| 137 | |||
| 138 |
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692 | if (new_nb) { |
| 139 | 692 | rects = av_realloc_array(rects, new_nb, sizeof(*sub->rects)); | |
| 140 |
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692 | if (!rects) |
| 141 | ✗ | return AVERROR(ENOMEM); | |
| 142 |
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692 | if (nb_rect_allocated) |
| 143 | 121 | *nb_rect_allocated = new_nb; | |
| 144 | 692 | sub->rects = rects; | |
| 145 | } | ||
| 146 | |||
| 147 | 692 | rect = av_mallocz(sizeof(*rect)); | |
| 148 |
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692 | if (!rect) |
| 149 | ✗ | return AVERROR(ENOMEM); | |
| 150 | 692 | rects[sub->num_rects++] = rect; | |
| 151 | 692 | rect->type = SUBTITLE_ASS; | |
| 152 | 692 | ass_str = ff_ass_get_dialog(readorder, layer, style, speaker, dialog); | |
| 153 |
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692 | if (!ass_str) |
| 154 | ✗ | return AVERROR(ENOMEM); | |
| 155 | 692 | rect->ass = ass_str; | |
| 156 | 692 | return 0; | |
| 157 | } | ||
| 158 | |||
| 159 | 571 | int ff_ass_add_rect(AVSubtitle *sub, const char *dialog, | |
| 160 | int readorder, int layer, const char *style, | ||
| 161 | const char *speaker) | ||
| 162 | { | ||
| 163 | 571 | return ff_ass_add_rect2(sub, dialog, readorder, layer, style, speaker, NULL); | |
| 164 | } | ||
| 165 | |||
| 166 | ✗ | void ff_ass_decoder_flush(AVCodecContext *avctx) | |
| 167 | { | ||
| 168 | ✗ | FFASSDecoderContext *s = avctx->priv_data; | |
| 169 | ✗ | if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP)) | |
| 170 | ✗ | s->readorder = 0; | |
| 171 | ✗ | } | |
| 172 | |||
| 173 | 132 | void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size, | |
| 174 | const char *linebreaks, int keep_ass_markup) | ||
| 175 | { | ||
| 176 | 132 | const char *p_end = p + size; | |
| 177 | |||
| 178 |
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4676 | for (; p < p_end && *p; p++) { |
| 179 | |||
| 180 | /* forced custom line breaks, not accounted as "normal" EOL */ | ||
| 181 |
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4544 | if (linebreaks && strchr(linebreaks, *p)) { |
| 182 | 18 | av_bprintf(buf, "\\N"); | |
| 183 | |||
| 184 | /* cancel curly brackets to avoid bogus override tag blocks | ||
| 185 | * hiding text. Standard ASS has no character escapes, | ||
| 186 | * though (only) libass provides \{ and \}. | ||
| 187 | * Unpaired closing brackets don't need escaping at all though and | ||
| 188 | * to make the situation less bad in standard ASS insert an empty block | ||
| 189 | */ | ||
| 190 |
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4526 | } else if (!keep_ass_markup && *p == '{') { |
| 191 | ✗ | av_bprintf(buf, "\\{{}"); | |
| 192 | |||
| 193 | /* append word-joiner U+2060 as UTF-8 to break up sequences like \N */ | ||
| 194 |
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4526 | } else if (!keep_ass_markup && *p == '\\') { |
| 195 | ✗ | if (p_end - p <= 3 || strncmp(p + 1, "\xe2\x81\xa0", 3)) | |
| 196 | ✗ | av_bprintf(buf, "\\\xe2\x81\xa0"); | |
| 197 | else | ||
| 198 | ✗ | av_bprintf(buf, "\\"); | |
| 199 | |||
| 200 | /* some packets might end abruptly (no \0 at the end, like for example | ||
| 201 | * in some cases of demuxing from a classic video container), some | ||
| 202 | * might be terminated with \n or \r\n which we have to remove (for | ||
| 203 | * consistency with those who haven't), and we also have to deal with | ||
| 204 | * evil cases such as \r at the end of the buffer (and no \0 terminated | ||
| 205 | * character) */ | ||
| 206 |
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4526 | } else if (p[0] == '\n') { |
| 207 | /* some stuff left so we can insert a line break */ | ||
| 208 |
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78 | if (p < p_end - 1) |
| 209 | 35 | av_bprintf(buf, "\\N"); | |
| 210 |
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4448 | } else if (p[0] == '\r' && p < p_end - 1 && p[1] == '\n') { |
| 211 | /* \r followed by a \n, we can skip it. We don't insert the \N yet | ||
| 212 | * because we don't know if it is followed by more text */ | ||
| 213 | ✗ | continue; | |
| 214 | |||
| 215 | /* finally, a sane character */ | ||
| 216 | } else { | ||
| 217 | 4448 | av_bprint_chars(buf, *p, 1); | |
| 218 | } | ||
| 219 | } | ||
| 220 | 132 | } | |
| 221 |