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authorJacopo Mondi <jacopo@jmondi.org>2019-05-10 17:40:02 +0200
committerJacopo Mondi <jacopo@jmondi.org>2019-08-12 11:55:46 +0200
commit667d8ea8fd4bda35e8888792d2b6c055fdb4be18 (patch)
tree786462c9f8dfce3d3d05d69dc8befcd67e94db07 /src/android/camera3_hal.cpp
parent6bed34da161bb8c4e86821116dcff2205e29c58a (diff)
android: hal: Add Camera3 HAL
Add libcamera Android Camera HALv3 implementation. The initial camera HAL implementation supports the LIMITED hardware level and uses statically defined metadata and camera characteristics. Add a build option named 'android' and adjust the build system to selectively compile the Android camera HAL and link it against the required Android libraries. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Diffstat (limited to 'src/android/camera3_hal.cpp')
-rw-r--r--src/android/camera3_hal.cpp111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/android/camera3_hal.cpp b/src/android/camera3_hal.cpp
new file mode 100644
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--- /dev/null
+++ b/src/android/camera3_hal.cpp
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * camera3_hal.cpp - Android Camera HALv3 module
+ */
+
+#include <hardware/camera_common.h>
+
+#include "camera_hal_manager.h"
+#include "camera_proxy.h"
+#include "log.h"
+
+using namespace libcamera;
+
+LOG_DEFINE_CATEGORY(HAL)
+
+static CameraHalManager cameraManager;
+
+/*------------------------------------------------------------------------------
+ * Android Camera HAL callbacks
+ */
+
+static int hal_get_number_of_cameras(void)
+{
+ return cameraManager.numCameras();
+}
+
+static int hal_get_camera_info(int id, struct camera_info *info)
+{
+ return cameraManager.getCameraInfo(id, info);
+}
+
+static int hal_set_callbacks(const camera_module_callbacks_t *callbacks)
+{
+ return 0;
+}
+
+static int hal_open_legacy(const struct hw_module_t *module, const char *id,
+ uint32_t halVersion, struct hw_device_t **device)
+{
+ return -ENOSYS;
+}
+
+static int hal_set_torch_mode(const char *camera_id, bool enabled)
+{
+ return -ENOSYS;
+}
+
+/*
+ * First entry point of the camera HAL module.
+ *
+ * Initialize the HAL but does not open any camera device yet (see hal_dev_open)
+ */
+static int hal_init()
+{
+ LOG(HAL, Info) << "Initialising Android camera HAL";
+
+ cameraManager.init();
+
+ return 0;
+}
+
+/*------------------------------------------------------------------------------
+ * Android Camera Device
+ */
+
+static int hal_dev_open(const hw_module_t *module, const char *name,
+ hw_device_t **device)
+{
+ LOG(HAL, Debug) << "Open camera " << name;
+
+ int id = atoi(name);
+ CameraProxy *proxy = cameraManager.open(id, module);
+ if (!proxy) {
+ LOG(HAL, Error)
+ << "Failed to open camera module '" << id << "'";
+ return -ENODEV;
+ }
+
+ *device = &proxy->camera3Device()->common;
+
+ return 0;
+}
+
+static struct hw_module_methods_t hal_module_methods = {
+ .open = hal_dev_open,
+};
+
+camera_module_t HAL_MODULE_INFO_SYM = {
+ .common = {
+ .tag = HARDWARE_MODULE_TAG,
+ .module_api_version = CAMERA_MODULE_API_VERSION_2_4,
+ .hal_api_version = HARDWARE_HAL_API_VERSION,
+ .id = CAMERA_HARDWARE_MODULE_ID,
+ .name = "libcamera camera HALv3 module",
+ .author = "libcamera",
+ .methods = &hal_module_methods,
+ .dso = nullptr,
+ .reserved = {},
+ },
+
+ .get_number_of_cameras = hal_get_number_of_cameras,
+ .get_camera_info = hal_get_camera_info,
+ .set_callbacks = hal_set_callbacks,
+ .get_vendor_tag_ops = nullptr,
+ .open_legacy = hal_open_legacy,
+ .set_torch_mode = hal_set_torch_mode,
+ .init = hal_init,
+ .reserved = {},
+};