Merge "audio: change volume only if effect updates the volume" into main

    }

    constexpr uint32_t unityGain = 1 << 24;

    Parameter::VolumeStereo volume = {.left = (float)(*(uint32_t*)pCmdData) / unityGain,

    Parameter::VolumeStereo requestedVolume = {.left = (float)(*(uint32_t*)pCmdData) / unityGain,

                                      .right = (float)(*(uint32_t*)pCmdData + 1) / unityGain};

    RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(

            mEffect->setParameter(Parameter::make<Parameter::volumeStereo>(volume))));

            mEffect->setParameter(Parameter::make<Parameter::volumeStereo>(requestedVolume))));

    // get volume from effect and set if changed.

    Parameter::Id id = Parameter::Id::make<Parameter::Id::commonTag>(Parameter::volumeStereo);

    Parameter volParam;

    RETURN_STATUS_IF_ERROR(statusTFromBinderStatus(mEffect->getParameter(id, &volParam)));

    Parameter::VolumeStereo appliedVolume = volParam.get<Parameter::volumeStereo>();

    // write unity gain back if volume was successfully set

    if (replySize && *replySize == 2 * sizeof(uint32_t) && pReplyData) {

        constexpr uint32_t vol_ret[2] = {unityGain, unityGain};

        uint32_t vl = (uint32_t)(appliedVolume.left * unityGain);

        uint32_t vr = (uint32_t)(appliedVolume.right * unityGain);

        uint32_t vol_ret[2] = {vl, vr};

        memcpy(pReplyData, vol_ret, sizeof(vol_ret));

    }

    return OK;