mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 16:33:02 +00:00
68ff8a0484
bstr.c doesn't really deserve its own directory, and compat had just a few files, most of which may as well be in osdep. There isn't really any justification for these extra directories, so get rid of them. The compat/libav.h was empty - just delete it. We changed our approach to API compatibility, and will likely not need it anymore.
479 lines
16 KiB
C
479 lines
16 KiB
C
/*
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* Subtitles converter to SSA/ASS in order to allow special formatting
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <string.h>
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#include <strings.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "misc/bstr.h"
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#include "misc/ctype.h"
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#include "sd.h"
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struct line {
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char *buf;
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int bufsize;
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int len;
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};
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#ifdef __GNUC__
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static void append_text(struct line *dst, char *fmt, ...) __attribute__ ((format(printf, 2, 3)));
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#endif
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static void append_text(struct line *dst, char *fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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int ret = vsnprintf(dst->buf + dst->len, dst->bufsize - dst->len, fmt, va);
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if (ret < 0)
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goto out;
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dst->len += ret;
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if (dst->len > dst->bufsize)
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dst->len = dst->bufsize;
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out:
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va_end(va);
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}
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static void append_text_n(struct line *dst, char *start, size_t length)
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{
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append_text(dst, "%.*s", (int)length, start);
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}
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/*
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* SubRip
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*
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* Support basic tags (italic, bold, underline, strike-through)
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* and font tag with size, color and face attributes.
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*
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*/
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struct font_tag {
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int size;
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uint32_t color;
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struct bstr face;
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bool has_size : 1;
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bool has_color : 1;
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bool has_face : 1;
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};
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static const struct tag_conv {
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char *from;
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char *to;
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} subrip_basic_tags[] = {
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{"<i>", "{\\i1}"}, {"</i>", "{\\i0}"},
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{"<b>", "{\\b1}"}, {"</b>", "{\\b0}"},
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{"<u>", "{\\u1}"}, {"</u>", "{\\u0}"},
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{"<s>", "{\\s1}"}, {"</s>", "{\\s0}"},
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{"}", "\\}"},
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{"\r\n", "\\N"}, {"\n", "\\N"}, {"\r", "\\N"},
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};
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static const struct {
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char *s;
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uint32_t v;
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} subrip_web_colors[] = {
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/* Named CSS3 colors in RGB format; a subset of those
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at http://www.w3.org/TR/css3-color/#svg-color */
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{"aliceblue", 0xF0F8FF},
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{"antiquewhite", 0xFAEBD7},
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{"aqua", 0x00FFFF},
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{"aquamarine", 0x7FFFD4},
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{"azure", 0xF0FFFF},
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{"beige", 0xF5F5DC},
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{"bisque", 0xFFE4C4},
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{"black", 0x000000},
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{"blanchedalmond", 0xFFEBCD},
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{"blue", 0x0000FF},
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{"blueviolet", 0x8A2BE2},
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{"brown", 0xA52A2A},
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{"burlywood", 0xDEB887},
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{"cadetblue", 0x5F9EA0},
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{"chartreuse", 0x7FFF00},
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{"chocolate", 0xD2691E},
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{"coral", 0xFF7F50},
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{"cornflowerblue", 0x6495ED},
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{"cornsilk", 0xFFF8DC},
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{"crimson", 0xDC143C},
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{"cyan", 0x00FFFF},
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{"darkblue", 0x00008B},
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{"darkcyan", 0x008B8B},
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{"darkgoldenrod", 0xB8860B},
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{"darkgray", 0xA9A9A9},
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{"darkgreen", 0x006400},
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{"darkgrey", 0xA9A9A9},
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{"darkkhaki", 0xBDB76B},
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{"darkmagenta", 0x8B008B},
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{"darkolivegreen", 0x556B2F},
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{"darkorange", 0xFF8C00},
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{"darkorchid", 0x9932CC},
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{"darkred", 0x8B0000},
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{"darksalmon", 0xE9967A},
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{"darkseagreen", 0x8FBC8F},
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{"darkslateblue", 0x483D8B},
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{"darkslategray", 0x2F4F4F},
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{"darkslategrey", 0x2F4F4F},
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{"darkturquoise", 0x00CED1},
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{"darkviolet", 0x9400D3},
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{"deeppink", 0xFF1493},
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{"deepskyblue", 0x00BFFF},
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{"dimgray", 0x696969},
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{"dimgrey", 0x696969},
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{"dodgerblue", 0x1E90FF},
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{"firebrick", 0xB22222},
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{"floralwhite", 0xFFFAF0},
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{"forestgreen", 0x228B22},
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{"fuchsia", 0xFF00FF},
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{"gainsboro", 0xDCDCDC},
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{"ghostwhite", 0xF8F8FF},
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{"gold", 0xFFD700},
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{"goldenrod", 0xDAA520},
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{"gray", 0x808080},
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{"green", 0x008000},
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{"greenyellow", 0xADFF2F},
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{"grey", 0x808080},
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{"honeydew", 0xF0FFF0},
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{"hotpink", 0xFF69B4},
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{"indianred", 0xCD5C5C},
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{"indigo", 0x4B0082},
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{"ivory", 0xFFFFF0},
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{"khaki", 0xF0E68C},
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{"lavender", 0xE6E6FA},
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{"lavenderblush", 0xFFF0F5},
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{"lawngreen", 0x7CFC00},
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{"lemonchiffon", 0xFFFACD},
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{"lightblue", 0xADD8E6},
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{"lightcoral", 0xF08080},
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{"lightcyan", 0xE0FFFF},
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{"lightgoldenrodyellow", 0xFAFAD2},
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{"lightgray", 0xD3D3D3},
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{"lightgreen", 0x90EE90},
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{"lightgrey", 0xD3D3D3},
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{"lightpink", 0xFFB6C1},
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{"lightsalmon", 0xFFA07A},
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{"lightseagreen", 0x20B2AA},
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{"lightskyblue", 0x87CEFA},
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{"lightslategray", 0x778899},
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{"lightslategrey", 0x778899},
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{"lightsteelblue", 0xB0C4DE},
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{"lightyellow", 0xFFFFE0},
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{"lime", 0x00FF00},
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{"limegreen", 0x32CD32},
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{"linen", 0xFAF0E6},
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{"magenta", 0xFF00FF},
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{"maroon", 0x800000},
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{"mediumaquamarine", 0x66CDAA},
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{"mediumblue", 0x0000CD},
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{"mediumorchid", 0xBA55D3},
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{"mediumpurple", 0x9370DB},
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{"mediumseagreen", 0x3CB371},
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{"mediumslateblue", 0x7B68EE},
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{"mediumspringgreen", 0x00FA9A},
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{"mediumturquoise", 0x48D1CC},
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{"mediumvioletred", 0xC71585},
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{"midnightblue", 0x191970},
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{"mintcream", 0xF5FFFA},
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{"mistyrose", 0xFFE4E1},
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{"moccasin", 0xFFE4B5},
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{"navajowhite", 0xFFDEAD},
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{"navy", 0x000080},
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{"oldlace", 0xFDF5E6},
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{"olive", 0x808000},
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{"olivedrab", 0x6B8E23},
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{"orange", 0xFFA500},
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{"orangered", 0xFF4500},
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{"orchid", 0xDA70D6},
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{"palegoldenrod", 0xEEE8AA},
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{"palegreen", 0x98FB98},
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{"paleturquoise", 0xAFEEEE},
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{"palevioletred", 0xDB7093},
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{"papayawhip", 0xFFEFD5},
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{"peachpuff", 0xFFDAB9},
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{"peru", 0xCD853F},
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{"pink", 0xFFC0CB},
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{"plum", 0xDDA0DD},
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{"powderblue", 0xB0E0E6},
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{"purple", 0x800080},
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{"red", 0xFF0000},
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{"rosybrown", 0xBC8F8F},
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{"royalblue", 0x4169E1},
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{"saddlebrown", 0x8B4513},
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{"salmon", 0xFA8072},
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{"sandybrown", 0xF4A460},
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{"seagreen", 0x2E8B57},
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{"seashell", 0xFFF5EE},
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{"sienna", 0xA0522D},
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{"silver", 0xC0C0C0},
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{"skyblue", 0x87CEEB},
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{"slateblue", 0x6A5ACD},
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{"slategray", 0x708090},
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{"slategrey", 0x708090},
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{"snow", 0xFFFAFA},
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{"springgreen", 0x00FF7F},
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{"steelblue", 0x4682B4},
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{"tan", 0xD2B48C},
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{"teal", 0x008080},
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{"thistle", 0xD8BFD8},
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{"tomato", 0xFF6347},
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{"turquoise", 0x40E0D0},
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{"violet", 0xEE82EE},
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{"wheat", 0xF5DEB3},
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{"white", 0xFFFFFF},
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{"whitesmoke", 0xF5F5F5},
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{"yellow", 0xFFFF00},
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{"yellowgreen", 0x9ACD32},
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};
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#define SUBRIP_MAX_STACKED_FONT_TAGS 16
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/* Read the HTML-style attribute starting at *s, and skip *s past the value.
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* Set attr and val to the parsed attribute name and value.
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* Return 0 on success, or -1 if no valid attribute was found.
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*/
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static int read_attr(char **s, struct bstr *attr, struct bstr *val)
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{
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char *eq = strchr(*s, '=');
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if (!eq)
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return -1;
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attr->start = *s;
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attr->len = eq - *s;
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for (int i = 0; i < attr->len; i++)
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if (!mp_isalnum(attr->start[i]))
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return -1;
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val->start = eq + 1;
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bool quoted = val->start[0] == '"';
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if (quoted)
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val->start++;
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unsigned char *end = strpbrk(val->start, quoted ? "\"" : " >");
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if (!end)
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return -1;
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val->len = end - val->start;
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*s = end + quoted;
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return 0;
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}
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static void convert_subrip(struct sd *sd, const char *orig,
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char *dest, int dest_buffer_size)
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{
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/* line is not const to avoid warnings with strtol, etc.
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* orig content won't be changed */
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char *line = (char *)orig;
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struct line new_line = {
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.buf = dest,
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.bufsize = dest_buffer_size,
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};
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struct font_tag font_stack[SUBRIP_MAX_STACKED_FONT_TAGS + 1];
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font_stack[0] = (struct font_tag){0}; // type with all defaults
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int sp = 0;
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while (*line && new_line.len < new_line.bufsize - 1) {
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char *orig_line = line;
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for (int i = 0; i < MP_ARRAY_SIZE(subrip_basic_tags); i++) {
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const struct tag_conv *tag = &subrip_basic_tags[i];
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int from_len = strlen(tag->from);
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if (strncmp(line, tag->from, from_len) == 0) {
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append_text(&new_line, "%s", tag->to);
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line += from_len;
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}
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}
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if (strncmp(line, "</font>", 7) == 0) {
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/* Closing font tag */
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line += 7;
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if (sp > 0) {
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struct font_tag *tag = &font_stack[sp];
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struct font_tag *last_tag = &tag[-1];
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sp--;
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if (tag->has_size) {
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if (!last_tag->has_size)
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append_text(&new_line, "{\\fs}");
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else if (last_tag->size != tag->size)
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append_text(&new_line, "{\\fs%d}", last_tag->size);
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}
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if (tag->has_color) {
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if (!last_tag->has_color)
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append_text(&new_line, "{\\c}");
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else if (last_tag->color != tag->color)
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append_text(&new_line, "{\\c&H%06X&}", last_tag->color);
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}
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if (tag->has_face) {
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if (!last_tag->has_face)
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append_text(&new_line, "{\\fn}");
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else if (bstrcmp(last_tag->face, tag->face) != 0)
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append_text(&new_line, "{\\fn%.*s}",
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BSTR_P(last_tag->face));
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}
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}
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} else if (strncmp(line, "<font ", 6) == 0
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&& sp + 1 < MP_ARRAY_SIZE(font_stack)) {
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/* Opening font tag */
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char *potential_font_tag_start = line;
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int len_backup = new_line.len;
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struct font_tag *tag = &font_stack[sp + 1];
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bool has_valid_attr = false;
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*tag = tag[-1]; // keep values from previous tag
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line += 6;
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while (*line && *line != '>') {
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if (*line == ' ') {
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line++;
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continue;
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}
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struct bstr attr, val;
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if (read_attr(&line, &attr, &val) < 0)
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break;
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if (!bstrcmp0(attr, "size")) {
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tag->size = bstrtoll(val, &val, 10);
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if (val.len)
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break;
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append_text(&new_line, "{\\fs%d}", tag->size);
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tag->has_size = true;
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has_valid_attr = true;
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} else if (!bstrcmp0(attr, "color")) {
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int found = 0;
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// Try to lookup the string in standard web colors
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for (int i = 0; i < MP_ARRAY_SIZE(subrip_web_colors); i++) {
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char *color = subrip_web_colors[i].s;
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if (bstrcasecmp(val, bstr0(color)) == 0) {
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uint32_t xcolor = subrip_web_colors[i].v;
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tag->color = ((xcolor & 0xff) << 16)
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| (xcolor & 0xff00)
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| ((xcolor & 0xff0000) >> 16);
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found = 1;
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}
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}
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// If it's not a web color it must be a HEX RGB value
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if (!found) {
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// Remove the leading '#'
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bstr_eatstart(&val, bstr0("#"));
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// Sometimes there are two '#'
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bstr_eatstart(&val, bstr0("#"));
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// Parse RRGGBB format
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tag->color = bstrtoll(val, &val, 16) & 0x00ffffff;
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if (!val.len) {
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tag->color = ((tag->color & 0xff) << 16)
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| (tag->color & 0xff00)
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| ((tag->color & 0xff0000) >> 16);
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found = 1;
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}
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}
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if (found) {
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append_text(&new_line, "{\\c&H%06X&}", tag->color);
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tag->has_color = true;
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} else {
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// We didn't find any matching color
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MP_WARN(sd, "unknown font color in subtitle: >%s<\n",
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orig);
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append_text(&new_line, "{\\c}");
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}
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has_valid_attr = true;
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} else if (!bstrcmp0(attr, "face")) {
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/* Font face attribute */
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tag->face = val;
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append_text(&new_line, "{\\fn%.*s}", BSTR_P(tag->face));
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tag->has_face = true;
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has_valid_attr = true;
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} else
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MP_WARN(sd, "unrecognized attribute \"%.*s\" in font tag\n",
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BSTR_P(attr));
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}
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if (!has_valid_attr || *line != '>') { /* Not valid font tag */
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line = potential_font_tag_start;
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new_line.len = len_backup;
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} else {
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sp++;
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line++;
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}
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} else if (*line == '{') {
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char *end = strchr(line, '}');
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if (line[1] == '\\' && end) {
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// Likely ASS tag, pass them through
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// Note that ASS tags like {something\an8} are legal too (i.e.
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// the first character after '{' doesn't have to be '\'), but
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// consider these fringe cases not worth supporting.
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append_text_n(&new_line, line, end - line + 1);
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line = end + 1;
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} else {
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append_text(&new_line, "\\{");
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line++;
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}
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}
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/* Tag conversion code didn't match */
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if (line == orig_line)
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new_line.buf[new_line.len++] = *line++;
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}
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new_line.buf[new_line.len] = 0;
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}
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static const char *const srt_ass_extradata =
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"[Script Info]\n"
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"ScriptType: v4.00+\n"
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"PlayResX: 384\n"
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"PlayResY: 288\n";
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static bool supports_format(const char *format)
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{
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return format && (strcmp(format, "subrip") == 0 ||
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strcmp(format, "text") == 0);
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}
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static int init(struct sd *sd)
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{
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sd->output_codec = "ass-text";
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sd->output_extradata = (char *)srt_ass_extradata;
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sd->output_extradata_len = strlen(sd->output_extradata);
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return 0;
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}
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static void decode(struct sd *sd, struct demux_packet *packet)
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{
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char dest[SD_MAX_LINE_LEN];
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// Assume input buffer is padded with 0
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convert_subrip(sd, packet->buffer, dest, sizeof(dest));
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sd_conv_add_packet(sd, dest, strlen(dest), packet->pts, packet->duration);
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}
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const struct sd_functions sd_srt = {
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.name = "srt",
|
|
.supports_format = supports_format,
|
|
.init = init,
|
|
.decode = decode,
|
|
.get_converted = sd_conv_def_get_converted,
|
|
.reset = sd_conv_def_reset,
|
|
};
|