1 files changed, 21 insertions, 1 deletions
diff --git a/web/script/player/track/mse.ts b/web/script/player/track/mse.ts
index 237b6f6..c69833b 100644
--- a/web/script/player/track/mse.ts
+++ b/web/script/player/track/mse.ts
@@ -3,7 +3,7 @@
     which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
     Copyright (C) 2025 metamuffin <metamuffin.org>
 */
-import { OVar } from "../../jshelper/mod.ts";
+import { OVar, show } from "../../jshelper/mod.ts";
 import { test_media_capability, track_to_content_type } from "../mediacaps.ts";
 import { BufferRange, Player } from "../player.ts";
 import { PlayerTrack, AppendRange, TARGET_BUFFER_DURATION, MIN_BUFFER_DURATION } from "./mod.ts";
@@ -60,6 +60,7 @@ export class MSEPlayerTrack extends PlayerTrack {
           this.usable_formats.push({ container, format, format_index: i, usable_index: this.usable_formats.length })
       }
     }
+    this.usable_formats.sort((a, b) => b.format.bitrate - a.format.bitrate)
     if (!this.usable_formats.length)
       return this.player.logger?.log("No availble format is supported by this device. The track can't be played back.")
     this.active_format.value = this.usable_formats[0]
@@ -94,6 +95,24 @@ export class MSEPlayerTrack extends PlayerTrack {
     this.update(this.player.video.currentTime)
   }
 
+  choose_format() {
+    if (!this.active_format.value) return
+    const ai = this.active_format.value.usable_index
+    const current_br = this.active_format.value.format.bitrate
+    const avail_br = this.player.downloader.bandwidth_avail.value * 8
+    const prev_format = this.active_format.value
+    if (ai < this.usable_formats.length - 1 && current_br > avail_br) {
+      this.active_format.value = this.usable_formats[ai + 1]
+    }
+    if (ai > 0 && avail_br > this.usable_formats[ai - 1].format.bitrate * 1.2) {
+      this.active_format.value = this.usable_formats[ai - 1]
+    }
+    if (prev_format != this.active_format.value) {
+      console.log(`${show.metric(prev_format.format.bitrate)} -> ${this.active_format.value.format.bitrate}`);
+      this.choose_format()
+    }
+  }
+
   update_buf_ranges() {
     if (!this.index) return;
     const ranges: BufferRange[] = [];
@@ -136,6 +155,7 @@ export class MSEPlayerTrack extends PlayerTrack {
   }
 
   async load(index: number) {
+    this.choose_format()
     this.loading.add(index);
     // TODO update format selection
     const url = `${this.base_url}?fragment&segment=${this.segment_index}&track=${this.track_index}&format=${this.active_format.value!.format_index}&index=${index}&container=${this.active_format.value!.container}`;