The presence of the kKeyAACProfile is optional, we should not mandate its presence in AACWriter.

    CHECK(!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC));

    CHECK(meta->findInt32(kKeyChannelCount, &mChannelCount));

    CHECK(meta->findInt32(kKeySampleRate, &mSampleRate));

    CHECK(meta->findInt32(kKeyAACProfile, &mAACProfile));

    CHECK(mChannelCount >= 1 && mChannelCount <= 2);

    // Optionally, we want to check whether AACProfile is also set.

    if (meta->findInt32(kKeyAACProfile, &mAACProfile)) {

        ALOGI("AAC profile is changed to %d", mAACProfile);

    }

    mSource = source;

    return OK;

}