Merge "Codec2: Add sys-prop to allow dmabuf heap usage to be forced"

}

static bool using_ion(void) {

    static int cached_result = -1;

    if (cached_result == -1) {

    static int cached_result = []()->int {

        struct stat buffer;

        cached_result = (stat("/dev/ion", &buffer) == 0);

        if (cached_result)

        int ret = (stat("/dev/ion", &buffer) == 0);

        if (property_get_int32("debug.c2.use_dmabufheaps", 0)) {

            /*

             * Double check that the system heap is present so we

             * can gracefully fail back to ION if we cannot satisfy

             * the override

             */

            ret = (stat("/dev/dma_heap/system", &buffer) != 0);

            if (ret)

                ALOGE("debug.c2.use_dmabufheaps set, but no system heap. Ignoring override!");

            else

                ALOGD("debug.c2.use_dmabufheaps set, forcing DMABUF Heaps");

        }

        if (ret)

            ALOGD("Using ION\n");

        else

            ALOGD("Using DMABUF Heaps\n");

    }

        return ret;

    }();

    return (cached_result == 1);

}