File size: 5,725 Bytes
4e1096a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | import { TTSMark } from '@/services/tts/types';
import { code6392to6391, inferLangFromScript, isSameLang, isValidLang } from './lang';
const cleanTextContent = (text: string) =>
text.replace(/\r\n/g, ' ').replace(/\r/g, ' ').replace(/\n/g, ' ').trimStart();
export const genSSML = (lang: string, text: string, voice: string, rate: number) => {
const cleanedText = text.replace(/^<break\b[^>]*>/i, '');
return `
<speak version="1.0" xml:lang="${lang}">
<voice name="${voice}">
<prosody rate="${rate}" >
${cleanedText}
</prosody>
</voice>
</speak>
`;
};
export const genSSMLRaw = (text: string) => {
return `
<speak xmlns="http://www.w3.org/2001/10/synthesis" xml:lang="en"><mark name="-1"/>${text}</speak>
`;
};
export const parseSSMLLang = (ssml: string, primaryLang?: string): string => {
let lang = 'en';
const match = ssml.match(/xml:lang\s*=\s*"([^"]+)"/);
if (match && match[1]) {
const parts = match[1].split('-');
lang =
parts.length > 1
? `${parts[0]!.toLowerCase()}-${parts[1]!.toUpperCase()}`
: parts[0]!.toLowerCase();
lang = code6392to6391(lang) || lang;
if (!isValidLang(lang)) {
lang = 'en';
}
}
primaryLang = code6392to6391(primaryLang?.toLowerCase() || '') || primaryLang;
if (lang === 'en' && primaryLang && !isSameLang(lang, primaryLang)) {
lang = primaryLang.split('-')[0]!.toLowerCase();
}
const textWithoutLangTags = ssml.replace(/<lang[^>]*>.*?<\/lang>/gs, '');
return inferLangFromScript(textWithoutLangTags, lang);
};
const isValidMark = (mark: string) => {
const trimmed = mark.trim();
if (!trimmed || trimmed.length === 0) {
return false;
}
if (/^[\p{P}\p{S}]+$/u.test(trimmed)) {
return false;
}
return true;
};
export const parseSSMLMarks = (ssml: string, primaryLang?: string) => {
const defaultLang = parseSSMLLang(ssml, primaryLang) || 'en';
ssml = ssml.replace(/<speak[^>]*>/i, '').replace(/<\/speak>/i, '');
let plainText = '';
const marks: TTSMark[] = [];
let activeMark: string | null = null;
let currentLang = defaultLang;
const langStack: string[] = [];
const tagRegex = /<(\/?)(\w+)([^>]*)>|([^<]+)/g;
let match: RegExpExecArray | null;
while ((match = tagRegex.exec(ssml)) !== null) {
if (match[4]) {
const rawText = match[4];
const text = cleanTextContent(rawText);
if (text && activeMark && isValidMark(text)) {
const offset = plainText.length;
plainText += text;
marks.push({
offset,
name: activeMark,
text,
language: inferLangFromScript(text, currentLang) || currentLang,
});
} else {
plainText += cleanTextContent(rawText);
}
} else {
const isEnd = match[1] === '/';
const tagName = match[2];
const attr = match[3];
if (tagName === 'mark' && !isEnd) {
const nameMatch = attr?.match(/name="([^"]+)"/);
if (nameMatch) {
activeMark = nameMatch[1]!;
}
} else if (tagName === 'lang') {
if (!isEnd) {
langStack.push(currentLang);
const langMatch = attr?.match(/xml:lang="([^"]+)"/);
if (langMatch) {
currentLang = langMatch[1]!;
}
} else {
currentLang = langStack.pop() ?? defaultLang;
}
}
}
}
return { plainText, marks };
};
export const findSSMLMark = (charIndex: number, marks: TTSMark[]) => {
let left = 0;
let right = marks.length - 1;
let result: TTSMark | null = null;
while (left <= right) {
const mid = Math.floor((left + right) / 2);
const mark = marks[mid]!;
if (mark.offset <= charIndex) {
result = mark;
left = mid + 1;
} else {
right = mid - 1;
}
}
return result;
};
export const filterSSMLWithLang = (
ssml: string,
targetLang: string,
primaryLang?: string,
): string => {
const mainLang = parseSSMLLang(ssml, primaryLang);
// Normalize target language
const normalizedTarget = code6392to6391(targetLang.toLowerCase()) || targetLang.toLowerCase();
// Check if target matches main language
if (isSameLang(normalizedTarget, mainLang)) {
// Remove all <lang> blocks that don't match the main language
return ssml.replace(/<lang\s+xml:lang="([^"]+)"[^>]*>.*?<\/lang>/gs, (match, langAttr) => {
const blockLang = code6392to6391(langAttr.toLowerCase()) || langAttr.toLowerCase();
// If the lang block matches the main language, keep it as is
if (isSameLang(blockLang, mainLang)) {
return match;
}
// Otherwise remove the entire block
return '';
});
}
// Check if target matches any <lang> block
const langBlocks: Array<{ match: string; lang: string; content: string }> = [];
const langBlockRegex = /<lang\s+xml:lang="([^"]+)"[^>]*>(.*?)<\/lang>/gs;
let match: RegExpExecArray | null;
const tempRegex = new RegExp(langBlockRegex.source, langBlockRegex.flags);
while ((match = tempRegex.exec(ssml)) !== null) {
const blockLang = code6392to6391(match[1]!.toLowerCase()) || match[1]!.toLowerCase();
if (isSameLang(blockLang, normalizedTarget)) {
langBlocks.push({
match: match[0]!,
lang: match[1]!,
content: match[2]!,
});
}
}
if (langBlocks.length > 0) {
const speakOpenMatch = ssml.match(/<speak[^>]*>/i);
const speakCloseMatch = ssml.match(/<\/speak>/i);
if (!speakOpenMatch || !speakCloseMatch) {
return ssml;
}
const combinedContent = langBlocks.map((block) => block.match).join('');
return `${speakOpenMatch[0]}${combinedContent}${speakCloseMatch[0]}`;
}
return ssml;
};
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