cameraservice: Implement HAL1 and higher HAL API coexistence

A higher hal version device like HAL3.2 can be opened as HAL1.0 device
if HAL supports it. This only applies to camera API1.

Change-Id: I4ae9f59f4317158cc1bd7ed7726e4032cdd1fa07

1 files changed, 16 insertions, 2 deletions

diff --git a/services/camera/libcameraservice/device1/CameraHardwareInterface.h b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
index 87b2807..925b645 100644
--- a/services/camera/libcameraservice/device1/CameraHardwareInterface.h
+++ b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
@@ -92,8 +92,22 @@ public:
     status_t initialize(hw_module_t *module)
     {
         ALOGI("Opening camera %s", mName.string());
-        int rc = module->methods->open(module, mName.string(),
-                                       (hw_device_t **)&mDevice);
+        camera_module_t *cameraModule = reinterpret_cast<camera_module_t *>(module);
+        camera_info info;
+        status_t res = cameraModule->get_camera_info(atoi(mName.string()), &info);
+        if (res != OK) return res;
+
+        int rc = OK;
+        if (module->module_api_version >= CAMERA_MODULE_API_VERSION_2_3 &&
+            info.device_version > CAMERA_DEVICE_API_VERSION_1_0) {
+            // Open higher version camera device as HAL1.0 device.
+            rc = cameraModule->open_legacy(module, mName.string(),
+                                               CAMERA_DEVICE_API_VERSION_1_0,
+                                               (hw_device_t **)&mDevice);
+        } else {
+            rc = module->methods->open(module, mName.string(),
+                                           (hw_device_t **)&mDevice);
+        }
         if (rc != OK) {
             ALOGE("Could not open camera %s: %d", mName.string(), rc);
             return rc;