implemented core subtitle support
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itsmattkc
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/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2021 Olive Team
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This program 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 3 of the License, or
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(at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "subtitleparams.h"
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#include <QCoreApplication>
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namespace olive {
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QString SubtitleParams::GetEncodingName(Encoding encoding)
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{
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switch (encoding) {
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case kISO8859_1:
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return QCoreApplication::translate("SubtitleParams", "ASCII/ISO 8859-1");
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case kWindows1252:
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return QCoreApplication::translate("SubtitleParams", "Windows-1252");
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case kUTF8:
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return QCoreApplication::translate("SubtitleParams", "UTF-8");
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case kUTF8WithBOM:
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return QCoreApplication::translate("SubtitleParams", "UTF-8 with BOM");
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case kUTF16LE:
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return QCoreApplication::translate("SubtitleParams", "UTF-16LE");
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case kUTF16BE:
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return QCoreApplication::translate("SubtitleParams", "UTF-16BE");
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case kEncodingInvalid:
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case kEncodingCount:
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break;
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}
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return QCoreApplication::translate("SubtitleParams", "Unknown");
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}
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bool SubtitleParams::EncodingHasUnicodeBOM(Encoding encoding)
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{
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switch (encoding) {
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case kUTF8WithBOM:
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case kUTF16LE:
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case kUTF16BE:
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return true;
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case kISO8859_1:
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case kWindows1252:
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case kUTF8:
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case kEncodingInvalid:
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case kEncodingCount:
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break;
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}
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return false;
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}
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QByteArray SubtitleParams::GetUnicodeBOM(Encoding encoding)
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{
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QByteArray arr;
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if (encoding == kUTF8WithBOM) {
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arr.resize(3);
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arr[0] = 0xEF;
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arr[1] = 0xBB;
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arr[2] = 0xBF;
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} else if (encoding == kUTF16LE) {
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arr.resize(2);
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arr[0] = 0xFF;
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arr[1] = 0xFE;
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} else if (encoding == kUTF16BE) {
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arr.resize(2);
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arr[0] = 0xFE;
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arr[1] = 0xFF;
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}
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return arr;
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}
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const char *SubtitleParams::GetQTextStreamCodec(Encoding encoding)
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{
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switch (encoding) {
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case SubtitleParams::kISO8859_1:
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return "ISO 8859-1";
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case SubtitleParams::kWindows1252:
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return "Windows-1252";
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case SubtitleParams::kUTF8:
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case SubtitleParams::kUTF8WithBOM:
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return "UTF-8";
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case SubtitleParams::kUTF16LE:
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return "UTF-16LE";
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case SubtitleParams::kUTF16BE:
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return "UTF-16BE";
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case SubtitleParams::kEncodingInvalid:
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case SubtitleParams::kEncodingCount:
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break;
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}
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return nullptr;
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}
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QString SubtitleParams::GenerateASSHeader()
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{
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// NOTE: We'll probably implement more customization as we support ASS better. Right now, we only
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// natively support SRT and only make this header because FFmpeg requires it.
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static const int kAssDefaultPlayResX = 384;
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static const int kAssDefaultPlayResY = 288;
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static const QString kAssDefaultFont = QStringLiteral("Arial");
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static const int kAssDefaultFontSize = 16;
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static const int kAssDefaultPrimaryColor = 0xFFFFFF; // White
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static const int kAssDefaultSecondaryColor = 0xFFFFFF; // White
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static const int kAssDefaultOutlineColor = 0x000000; // Black
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static const int kAssDefaultBackColor = 0x000000; // Black
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static const int kAssBold = 0;
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static const int kAssItalic = 0;
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static const int kAssUnderline = 0;
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static const int kAssStrike = 0;
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static const int kAssBorderStyle = 1;
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static const int kAssAlignment = 2;
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static const QString kFormatHeader = QStringLiteral(
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"[Script Info]\r\n"
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"; Script generated by %1 %2\r\n"
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"ScriptType: v4.00+\r\n"
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"PlayResX: %3\r\n"
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"PlayResY: %4\r\n"
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"ScaledBorderAndShadow: yes\r\n"
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"\r\n"
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/* ASSv4 header */
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"[V4+ Styles]\r\n"
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"Format: Name, "
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"Fontname, Fontsize, "
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"PrimaryColour, SecondaryColour, OutlineColour, BackColour, "
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"Bold, Italic, Underline, StrikeOut, "
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"ScaleX, ScaleY, "
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"Spacing, Angle, "
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"BorderStyle, Outline, Shadow, "
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"Alignment, MarginL, MarginR, MarginV, "
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"Encoding\r\n"
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"Style: "
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"Default," /* Name */
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"%5,%6," /* Font{name,size} */
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"&H%7,&H%8,&H%9,&H%10," /* {Primary,Secondary,Outline,Back}Colour */
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"%11,%12,%13,%14," /* Bold, Italic, Underline, StrikeOut */
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"100,100," /* Scale{X,Y} */
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"0,0," /* Spacing, Angle */
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"%15,1,0," /* BorderStyle, Outline, Shadow */
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"%16,10,10,10," /* Alignment, Margin[LRV] */
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"0\r\n" /* Encoding */
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"\r\n"
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"[Events]\r\n"
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"Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n"
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);
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return kFormatHeader.arg(QCoreApplication::applicationName(),
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QCoreApplication::applicationVersion(),
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QString::number(kAssDefaultPlayResX),
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QString::number(kAssDefaultPlayResY),
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kAssDefaultFont,
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QString::number(kAssDefaultFontSize),
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QString::number(kAssDefaultPrimaryColor, 16),
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QString::number(kAssDefaultSecondaryColor, 16),
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QString::number(kAssDefaultOutlineColor, 16),
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QString::number(kAssDefaultBackColor, 16),
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QString::number(kAssBold),
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QString::number(kAssItalic),
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QString::number(kAssUnderline),
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QString::number(kAssStrike),
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QString::number(kAssBorderStyle),
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QString::number(kAssAlignment)
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);
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}
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}
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