[c++]const 멤버를 가지고 있는 구조체 초기화에 대하여..

struct alsa_properties_t
{
    const AudioSystem::audio_devices device;
    const char         *propName;
    const char         *propDefault;
    mixer_info_t       *mInfo;
};
 
#define ALSA_PROP(dev, name, out, in) \
    {\
        {dev, "alsa.mixer.playback." name, out, NULL},\
        {dev, "alsa.mixer.capture." name, in, NULL}\
    }
 
 
class ALSAMixer
{
    public:
        ALSAMixer(const char *sndcard = "hw:00");
        status_t                getPlaybackMuteState(uint32_t device, bool *state);
 
    private:
        snd_mixer_t *           mMixer[SND_PCM_STREAM_LAST+1];
        alsa_properties_t       mixerMasterProp[SND_PCM_STREAM_LAST+1];
        alsa_properties_t       mixerProp[SND_MIXER_OUT_DEVICE][SND_PCM_STREAM_LAST+1];
};
 
 
====ALSAMixer.cpp====
    namespace android_audio_legacy
    {
       ...
 
106: ALSAMixer::ALSAMixer(const char *sndcard)
107: {
108:    int err;
109:    LOGI(" Init ALSAMIXER for SNDCARD : %s",sndcard);
110:
111:    mixerMasterProp =
112:        ALSA_PROP(AudioSystem::DEVICE_OUT_ALL, "master", "PCM", "Capture");
113:
114:    mixerProp = {
115:        ALSA_PROP(AudioSystem::DEVICE_OUT_EARPIECE, "earpiece", "Earpiece", "Capture"),
116:        ALSA_PROP(AudioSystem::DEVICE_OUT_SPEAKER, "speaker", "Speaker",  ""),
117:        ALSA_PROP(AudioSystem::DEVICE_OUT_WIRED_HEADSET, "headset", "Headphone", "Capture"),
118:        ALSA_PROP(AudioSystem::DEVICE_OUT_BLUETOOTH_SCO, "bluetooth.sco", "Bluetooth", "Bluetooth Capture"),
119:        ALSA_PROP(AudioSystem::DEVICE_OUT_BLUETOOTH_A2DP, "bluetooth.a2dp", "Bluetooth A2DP", "Bluetooth A2DP Capture"),
120:        ALSA_PROP(static_cast<AudioSystem::audio_devices>(0), "", NULL, NULL)
        };
 
     .....
 
    }