76 lines
1.9 KiB
TypeScript
76 lines
1.9 KiB
TypeScript
// 音频配置管理 - 简化版
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export interface AudioFormat {
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mimeType: string;
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extension: string;
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codec: string;
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quality: "low" | "medium" | "high" | "lossless";
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maxBitrate: number;
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}
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// 支持的音频格式配置
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export const SUPPORTED_AUDIO_FORMATS: Record<string, AudioFormat> = {
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webm: {
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mimeType: "audio/webm;codecs=opus",
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extension: ".webm",
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codec: "opus",
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quality: "high",
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maxBitrate: 128000,
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},
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ogg: {
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mimeType: "audio/ogg;codecs=opus",
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extension: ".ogg",
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codec: "opus",
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quality: "high",
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maxBitrate: 192000,
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},
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aac: {
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mimeType: "audio/aac",
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extension: ".aac",
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codec: "aac",
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quality: "high",
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maxBitrate: 256000,
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},
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};
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// 获取浏览器支持的音频格式
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export function getSupportedFormats(): AudioFormat[] {
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const supported: AudioFormat[] = [];
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// 检查 WebM 支持
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if (MediaRecorder.isTypeSupported("audio/webm;codecs=opus")) {
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supported.push(SUPPORTED_AUDIO_FORMATS.webm);
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}
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// 检查 OGG 支持
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if (MediaRecorder.isTypeSupported("audio/ogg;codecs=opus")) {
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supported.push(SUPPORTED_AUDIO_FORMATS.ogg);
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}
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// 检查 AAC 支持
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if (MediaRecorder.isTypeSupported("audio/aac")) {
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supported.push(SUPPORTED_AUDIO_FORMATS.aac);
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}
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// 如果没有支持的格式，至少返回 WebM
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if (supported.length === 0) {
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supported.push(SUPPORTED_AUDIO_FORMATS.webm);
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}
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return supported;
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}
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// 获取最佳录音格式
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export function getBestRecordingFormat(): AudioFormat {
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const supported = getSupportedFormats();
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return supported[0] || SUPPORTED_AUDIO_FORMATS.webm;
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}
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// 格式化文件大小
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export function formatFileSize(bytes: number): string {
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if (bytes === 0) return "0 B";
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const k = 1024;
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const sizes = ["B", "KB", "MB", "GB"];
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const i = Math.floor(Math.log(bytes) / Math.log(k));
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return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + " " + sizes[i];
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}
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