拆分媒体

client/public/media-config.js

@@ -0,0 +1,80 @@
+export const AUDIO_CONFIG = {
+    echoCancellation: true,
+    noiseSuppression: true,
+    autoGainControl: true
+};
+
+export const VAD_CONFIG = {
+    threshold: 15,
+    debounceTime: 500,
+    fftSize: 256
+};
+
+export const MEDIA_CONSTRAINTS = {
+    video: {
+        width: { ideal: 1920, max: 1920 },
+        height: { ideal: 1080, max: 1080 },
+        frameRate: { ideal: 30, max: 30 }
+    },
+    audio: AUDIO_CONFIG
+};
+
+export const VIDEO_ONLY_CONSTRAINT = {
+    video: {
+        width: { ideal: 1920, max: 1920 },
+        height: { ideal: 1080, max: 1080 },
+        frameRate: { ideal: 30, max: 30 }
+    },
+    audio: false
+};
+
+const TARGET_RESOLUTION_BITRATE_MAP = {
+    270: 1000000,
+    480: 1500000,
+    720: 2500000,
+    1080: 4000000,
+    1440: 6000000
+};
+
+export function buildVideoConstraints(savedResolution) {
+    if (!savedResolution) {
+        return MEDIA_CONSTRAINTS.video;
+    }
+
+    return {
+        width: { ideal: savedResolution.width, max: savedResolution.width },
+        height: { ideal: savedResolution.height, max: savedResolution.height },
+        frameRate: { ideal: 30, max: 30 }
+    };
+}
+
+export function getResolutionLabel(height) {
+    if (height >= 1440) {
+        return '2K 1440p';
+    }
+    if (height >= 1080) {
+        return '1080p 超清';
+    }
+    if (height >= 720) {
+        return '720p 高清';
+    }
+    return '480p 流畅';
+}
+
+export function getTargetResolutionBitrate(height) {
+    return TARGET_RESOLUTION_BITRATE_MAP[height] || 2500000;
+}
+
+export function getAdaptiveVideoBitrate(height) {
+    const supportedHeights = Object.keys(TARGET_RESOLUTION_BITRATE_MAP).map(Number).sort((a, b) => a - b);
+    let maxBitrate = TARGET_RESOLUTION_BITRATE_MAP[1080];
+
+    for (const supportedHeight of supportedHeights) {
+        if (height <= supportedHeight) {
+            return TARGET_RESOLUTION_BITRATE_MAP[supportedHeight];
+        }
+        maxBitrate = TARGET_RESOLUTION_BITRATE_MAP[supportedHeight];
+    }
+
+    return maxBitrate;
+}