Merge "No need to try mmap path when the vendor property set as NEVER."

    }

    std::vector<AudioMMapPolicyInfo> policyInfos;

    // The API setting is the highest priority.

    aaudio_policy_t mmapPolicy = AudioGlobal_getMMapPolicy();

    // If not specified then get from a system property.

    if (mmapPolicy == AAUDIO_UNSPECIFIED && android::AudioSystem::getMmapPolicyInfo(

    if (android::AudioSystem::getMmapPolicyInfo(

            AudioMMapPolicyType::DEFAULT, &policyInfos) == NO_ERROR) {

        mmapPolicy = AAudio_getAAudioPolicy(policyInfos);

        aaudio_policy_t systemMmapPolicy = AAudio_getAAudioPolicy(policyInfos);

        if (mmapPolicy == AAUDIO_POLICY_ALWAYS && systemMmapPolicy == AAUDIO_POLICY_NEVER) {

            // No need to try as AAudioService is not created and the client only wants MMAP path.

            return AAUDIO_ERROR_NO_SERVICE;

        }

        // Use system property for mmap policy if

        //    1. The API setting does not specify mmap policy or

        //    2. The system property specifies MMAP policy as never. In this case, AAudioService

        //       will not be started, no need to try mmap path.

        if (mmapPolicy == AAUDIO_UNSPECIFIED || systemMmapPolicy == AAUDIO_POLICY_NEVER) {

            mmapPolicy = systemMmapPolicy;

        }

    } else {

        // If it fails querying mmap policy info, it is highly possible that the AAudioService is

        // not created. In this case, we don't try mmap path.

        if (mmapPolicy == AAUDIO_POLICY_ALWAYS) {

            return AAUDIO_ERROR_NO_SERVICE;

        }

        mmapPolicy = AAUDIO_POLICY_NEVER;

    }

    // If still not specified then use the default.

    if (mmapPolicy == AAUDIO_UNSPECIFIED) {