Takes a channel mask and swap back channels with side channels if there is just one pair of surround channels. AkSpeakerConfig.h の 402 行で定義されています。 参照先 AK_SPEAKER_BACK_LEFT, AK_SPEAKER_BACK_RIGHT, AK_SPEAKER_SIDE_LEFT, AK_SPEAKER_SIDE_RIGHT, と HasStrictlyOnePairOfSurroundChannels(). |