1 files changed, 20 insertions, 9 deletions
diff --git a/web/script/player/profiles.ts b/web/script/player/profiles.ts
index b4de534..50be9d3 100644
--- a/web/script/player/profiles.ts
+++ b/web/script/player/profiles.ts
@@ -1,6 +1,8 @@
 import { OVar } from "../jshelper/mod.ts";
 import { EncodingProfile, JhlsMetadata } from "./jhls.d.ts";
 
+const PROFILE_UP_FAC = 0.7
+
 export interface EncodingProfileExt extends EncodingProfile { id: number, order: number }
 export class ProfileSelector {
     profiles_video: EncodingProfileExt[] = []
@@ -30,17 +32,26 @@ export class ProfileSelector {
         return []
     }
     select_optimal_profile(track: number, profile: OVar<EncodingProfileExt | undefined>) {
-        if (this.bandwidth.value < 5000 * 1000) {
-            profile.value = this.profile_list_for_track(track)[0]
-        } else {
-            profile.value = undefined
+        const profs = this.profile_list_for_track(track)
+
+        const co = profile.value?.order ?? -1
+        const current_bitrate = profile_bw(profs[co], 5000 * 1000)
+        const next_bitrate = profile_bw(profs[co - 1], 5000 * 1000)
+        console.log({ current_bitrate, next_bitrate, co, bandwidth: this.bandwidth.value * 8 });
+        if (current_bitrate > this.bandwidth.value * 8 && co + 1 < profs.length) {
+            console.log("profile up");
+            profile.value = profs[co + 1]
+        }
+        if (next_bitrate < this.bandwidth.value * 8 * PROFILE_UP_FAC && co >= 0) {
+            console.log("profile down");
+            profile.value = profs[co - 1]
         }
     }
 }
 
-function profile_bw(p: EncodingProfile): number {
-    if (p.audio) return p.audio.bitrate / 8
-    if (p.video) return p.video.bitrate / 8
-    if (p.subtitles) return 100
-    return 0
+function profile_bw(p?: EncodingProfile, fallback = 0): number {
+    if (p?.audio) return p.audio.bitrate / 8
+    if (p?.video) return p.video.bitrate / 8
+    if (p?.subtitles) return 100
+    return fallback
 }