1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <cstdlib>
18#include <hardware/camera_common.h>
19#include <hardware/hardware.h>
20#include "Camera.h"
21
22//#define LOG_NDEBUG 0
23#define LOG_TAG "DefaultCameraHAL"
24#include <cutils/log.h>
25
26#define ATRACE_TAG (ATRACE_TAG_CAMERA | ATRACE_TAG_HAL)
27#include <cutils/trace.h>
28
29#include "CameraHAL.h"
30
31/*
32 * This file serves as the entry point to the HAL.  It contains the module
33 * structure and functions used by the framework to load and interface to this
34 * HAL, as well as the handles to the individual camera devices.
35 */
36
37namespace default_camera_hal {
38
39// Default Camera HAL has 2 cameras, front and rear.
40static CameraHAL gCameraHAL(2);
41
42CameraHAL::CameraHAL(int num_cameras)
43  : mNumberOfCameras(num_cameras),
44    mCallbacks(NULL)
45{
46    int i;
47
48    // Allocate camera array and instantiate camera devices
49    mCameras = new Camera*[mNumberOfCameras];
50    for (i = 0; i < mNumberOfCameras; i++) {
51        mCameras[i] = new Camera(i);
52    }
53}
54
55CameraHAL::~CameraHAL()
56{
57    int i;
58
59    for (i = 0; i < mNumberOfCameras; i++) {
60        delete mCameras[i];
61    }
62    delete [] mCameras;
63}
64
65int CameraHAL::getNumberOfCameras()
66{
67    ALOGV("%s: %d", __func__, mNumberOfCameras);
68    return mNumberOfCameras;
69}
70
71int CameraHAL::getCameraInfo(int id, struct camera_info* info)
72{
73    ALOGV("%s: camera id %d: info=%p", __func__, id, info);
74    if (id < 0 || id >= mNumberOfCameras) {
75        ALOGE("%s: Invalid camera id %d", __func__, id);
76        return -ENODEV;
77    }
78    // TODO: return device-specific static metadata
79    return mCameras[id]->getInfo(info);
80}
81
82int CameraHAL::setCallbacks(const camera_module_callbacks_t *callbacks)
83{
84    ALOGV("%s : callbacks=%p", __func__, callbacks);
85    mCallbacks = callbacks;
86    return 0;
87}
88
89int CameraHAL::open(const hw_module_t* mod, const char* name, hw_device_t** dev)
90{
91    int id;
92    char *nameEnd;
93
94    ALOGV("%s: module=%p, name=%s, device=%p", __func__, mod, name, dev);
95    if (*name == '\0') {
96        ALOGE("%s: Invalid camera id name is NULL", __func__);
97        return -EINVAL;
98    }
99    id = strtol(name, &nameEnd, 10);
100    if (*nameEnd != '\0') {
101        ALOGE("%s: Invalid camera id name %s", __func__, name);
102        return -EINVAL;
103    } else if (id < 0 || id >= mNumberOfCameras) {
104        ALOGE("%s: Invalid camera id %d", __func__, id);
105        return -ENODEV;
106    }
107    return mCameras[id]->open(mod, dev);
108}
109
110extern "C" {
111
112static int get_number_of_cameras()
113{
114    return gCameraHAL.getNumberOfCameras();
115}
116
117static int get_camera_info(int id, struct camera_info* info)
118{
119    return gCameraHAL.getCameraInfo(id, info);
120}
121
122static int set_callbacks(const camera_module_callbacks_t *callbacks)
123{
124    return gCameraHAL.setCallbacks(callbacks);
125}
126
127static int open_dev(const hw_module_t* mod, const char* name, hw_device_t** dev)
128{
129    return gCameraHAL.open(mod, name, dev);
130}
131
132static hw_module_methods_t gCameraModuleMethods = {
133    open : open_dev
134};
135
136camera_module_t HAL_MODULE_INFO_SYM __attribute__ ((visibility("default"))) = {
137    common : {
138        tag                : HARDWARE_MODULE_TAG,
139        module_api_version : CAMERA_MODULE_API_VERSION_2_0,
140        hal_api_version    : HARDWARE_HAL_API_VERSION,
141        id                 : CAMERA_HARDWARE_MODULE_ID,
142        name               : "Default Camera HAL",
143        author             : "The Android Open Source Project",
144        methods            : &gCameraModuleMethods,
145        dso                : NULL,
146        reserved           : {0},
147    },
148    get_number_of_cameras : get_number_of_cameras,
149    get_camera_info       : get_camera_info,
150    set_callbacks         : set_callbacks
151};
152} // extern "C"
153
154} // namespace default_camera_hal
155