Bound restored manual stream bitrate choices to 12 Mbit/s

tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCameraModes.kt

@@ -14,6 +14,7 @@ data class StreamCaptureMode(val camera: String, val width: Int, val height: Int
                              val minimumBitrate: Int = 1, val maximumBitrate: Int = Int.MAX_VALUE,
                              val encoderProfile: Int? = videoCodec.profile) {
     val label get() = "${width}×${height} · $fps fps"
+    val manualBitrateRange get() = minimumBitrate..minOf(maximumBitrate, 12_000_000)
 }
 data class StreamCamera(val id: String, val lens: LensOption, val modes: List<StreamCaptureMode>)
 

tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureConfig.kt

@@ -13,5 +13,5 @@ data class StreamCaptureConfig(val mode: StreamCaptureMode, val orientation: Str
     val bitrate get() = videoBitrate ?: mode.bitrate
     init { require(bitrate in mode.minimumBitrate..mode.maximumBitrate) }
     fun withMode(next: StreamCaptureMode) = copy(mode = next,
-        videoBitrate = videoBitrate?.coerceIn(next.minimumBitrate, next.maximumBitrate))
+        videoBitrate = videoBitrate?.takeUnless { next.manualBitrateRange.isEmpty() }?.coerceIn(next.manualBitrateRange))
 }

tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureSettings.kt

@@ -18,7 +18,8 @@ data class StreamCaptureSettings(val camera: String = "", val width: Int = 1280,
             LogManager.addLog("WARN", "stream", "capture settings: camera=${selected.id} has no available mode"); return null
         }
         val orientation = StreamOrientation.values().firstOrNull { it.degrees == rotation } ?: StreamOrientation.LEFT
-        val restored = StreamCaptureConfig(mode, orientation, bitrate?.coerceIn(mode.minimumBitrate, mode.maximumBitrate))
+        val restored = StreamCaptureConfig(mode, orientation,
+            bitrate?.takeUnless { mode.manualBitrateRange.isEmpty() }?.coerceIn(mode.manualBitrateRange))
         if (camera.isNotEmpty() && (camera != mode.camera || width != mode.width || height != mode.height || fps != mode.fps ||
                 codec != mode.videoCodec.id || rotation != orientation.degrees || bitrate != restored.videoBitrate))
             LogManager.addLog("WARN", "stream", "capture settings adjusted: saved=$this restored=$restored")