setVolume method

@override Future<void> setVolume(double volume, { bool synchronized = true, })

Sets the playback volume of the Player. Defaults to 100.0.

Implementation

@override
Future<void> setVolume(double volume, {bool synchronized = true}) {
  Future<void> function() async {
    if (disposed) {
      throw AssertionError('[Player] has been disposed');
    }
    await waitForPlayerInitialization;
    await waitForVideoControllerInitializationIfAttached;

    {
      final name = 'mute'.toNativeUtf8();
      final value = calloc<Bool>();
      mpv.mpv_get_property(
        ctx,
        name.cast(),
        generated.mpv_format.MPV_FORMAT_FLAG,
        value.cast(),
      );
      if (value.value) {
        // Unmute the player before setting the volume.
        final command = 'cycle mute'.toNativeUtf8();
        mpv.mpv_command_string(
          ctx,
          command.cast(),
        );
        calloc.free(command);
      }
      calloc.free(name);
      calloc.free(value);
    }
    {
      final name = 'volume'.toNativeUtf8();
      final value = calloc<Double>();
      value.value = volume;
      mpv.mpv_set_property(
        ctx,
        name.cast(),
        generated.mpv_format.MPV_FORMAT_DOUBLE,
        value.cast(),
      );
      calloc.free(name);
      calloc.free(value);
    }
  }

  if (synchronized) {
    return lock.synchronized(function);
  } else {
    return function();
  }
}