1 files changed, 190 insertions, 0 deletions
diff --git a/camera/common/1.0/default/HandleImporter.cpp b/camera/common/1.0/default/HandleImporter.cpp
new file mode 100644
index 0000000000..dee2973386
--- /dev/null
+++ b/camera/common/1.0/default/HandleImporter.cpp
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "HandleImporter"
+#include <utils/Log.h>
+#include "HandleImporter.h"
+
+namespace android {
+namespace hardware {
+namespace camera {
+namespace common {
+namespace V1_0 {
+namespace helper {
+
+HandleImporter HandleImporter::sHandleImporter;
+
+HandleImporter& HandleImporter::getInstance() {
+    sHandleImporter.initialize();
+    return sHandleImporter;
+}
+
+bool HandleImporter::initialize() {
+    // allow only one client
+    if (mInitialized) {
+        return false;
+    }
+
+    if (!openGralloc()) {
+        return false;
+    }
+
+    mInitialized = true;
+    return true;
+}
+
+void HandleImporter::cleanup() {
+    if (!mInitialized) {
+        return;
+    }
+
+    closeGralloc();
+    mInitialized = false;
+}
+
+// In IComposer, any buffer_handle_t is owned by the caller and we need to
+// make a clone for hwcomposer2.  We also need to translate empty handle
+// to nullptr.  This function does that, in-place.
+bool HandleImporter::importBuffer(buffer_handle_t& handle) {
+    if (!handle->numFds && !handle->numInts) {
+        handle = nullptr;
+        return true;
+    }
+
+    buffer_handle_t clone = cloneBuffer(handle);
+    if (!clone) {
+        return false;
+    }
+
+    handle = clone;
+    return true;
+}
+
+void HandleImporter::freeBuffer(buffer_handle_t handle) {
+    if (!handle) {
+        return;
+    }
+
+    releaseBuffer(handle);
+}
+
+bool HandleImporter::importFence(const native_handle_t* handle, int& fd) {
+    if (handle == nullptr || handle->numFds == 0) {
+        fd = -1;
+    } else if (handle->numFds == 1) {
+        fd = dup(handle->data[0]);
+        if (fd < 0) {
+            ALOGE("failed to dup fence fd %d", handle->data[0]);
+            return false;
+        }
+    } else {
+        ALOGE("invalid fence handle with %d file descriptors",
+                handle->numFds);
+        return false;
+    }
+
+    return true;
+}
+
+void HandleImporter::closeFence(int fd) {
+    if (fd >= 0) {
+        close(fd);
+    }
+}
+
+bool HandleImporter::openGralloc() {
+    const hw_module_t* module;
+    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
+    if (err) {
+        ALOGE("failed to get gralloc module");
+        return false;
+    }
+
+    uint8_t major = (module->module_api_version >> 8) & 0xff;
+    if (major > 1) {
+        ALOGE("unknown gralloc module major version %d", major);
+        return false;
+    }
+
+    if (major == 1) {
+        err = gralloc1_open(module, &mDevice);
+        if (err) {
+            ALOGE("failed to open gralloc1 device");
+            return false;
+        }
+
+        mRetain = reinterpret_cast<GRALLOC1_PFN_RETAIN>(
+                mDevice->getFunction(mDevice, GRALLOC1_FUNCTION_RETAIN));
+        mRelease = reinterpret_cast<GRALLOC1_PFN_RELEASE>(
+                mDevice->getFunction(mDevice, GRALLOC1_FUNCTION_RELEASE));
+        if (!mRetain || !mRelease) {
+            ALOGE("invalid gralloc1 device");
+            gralloc1_close(mDevice);
+            return false;
+        }
+    } else {
+        mModule = reinterpret_cast<const gralloc_module_t*>(module);
+    }
+
+    return true;
+}
+
+void HandleImporter::closeGralloc() {
+    if (mDevice) {
+        gralloc1_close(mDevice);
+    }
+}
+
+buffer_handle_t HandleImporter::cloneBuffer(buffer_handle_t handle) {
+    native_handle_t* clone = native_handle_clone(handle);
+    if (!clone) {
+        ALOGE("failed to clone buffer %p", handle);
+        return nullptr;
+    }
+
+    bool err;
+    if (mDevice) {
+        err = (mRetain(mDevice, clone) != GRALLOC1_ERROR_NONE);
+    } else {
+        err = (mModule->registerBuffer(mModule, clone) != 0);
+    }
+
+    if (err) {
+        ALOGE("failed to retain/register buffer %p", clone);
+        native_handle_close(clone);
+        native_handle_delete(clone);
+        return nullptr;
+    }
+
+    return clone;
+}
+
+void HandleImporter::releaseBuffer(buffer_handle_t handle) {
+    if (mDevice) {
+        mRelease(mDevice, handle);
+    } else {
+        mModule->unregisterBuffer(mModule, handle);
+    }
+    native_handle_close(handle);
+    native_handle_delete(const_cast<native_handle_t*>(handle));
+}
+
+} // namespace helper
+} // namespace V1_0
+} // namespace common
+} // namespace camera
+} // namespace hardware
+} // namespace android