1 /*
2 * Copyright 2014 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 <errno.h>
18 #include <fcntl.h>
19 #include <malloc.h>
20
21 #include <cutils/log.h>
22 #include <cutils/native_handle.h>
23
24 #include <hardware/tv_input.h>
25
26 /*****************************************************************************/
27
28 typedef struct tv_input_private {
29 tv_input_device_t device;
30
31 // Callback related data
32 const tv_input_callback_ops_t* callback;
33 void* callback_data;
34 } tv_input_private_t;
35
36 static int tv_input_device_open(const struct hw_module_t* module,
37 const char* name, struct hw_device_t** device);
38
39 static struct hw_module_methods_t tv_input_module_methods = {
40 .open = tv_input_device_open
41 };
42
43 tv_input_module_t HAL_MODULE_INFO_SYM = {
44 .common = {
45 .tag = HARDWARE_MODULE_TAG,
46 .version_major = 0,
47 .version_minor = 1,
48 .id = TV_INPUT_HARDWARE_MODULE_ID,
49 .name = "Sample TV input module",
50 .author = "The Android Open Source Project",
51 .methods = &tv_input_module_methods,
52 }
53 };
54
55 /*****************************************************************************/
56
tv_input_initialize(struct tv_input_device * dev,const tv_input_callback_ops_t * callback,void * data)57 static int tv_input_initialize(struct tv_input_device* dev,
58 const tv_input_callback_ops_t* callback, void* data)
59 {
60 if (dev == NULL || callback == NULL) {
61 return -EINVAL;
62 }
63 tv_input_private_t* priv = (tv_input_private_t*)dev;
64 if (priv->callback != NULL) {
65 return -EEXIST;
66 }
67
68 priv->callback = callback;
69 priv->callback_data = data;
70
71 return 0;
72 }
73
tv_input_get_stream_configurations(const struct tv_input_device *,int,int *,const tv_stream_config_t **)74 static int tv_input_get_stream_configurations(
75 const struct tv_input_device*, int, int*, const tv_stream_config_t**)
76 {
77 return -EINVAL;
78 }
79
tv_input_open_stream(struct tv_input_device *,int,tv_stream_t *)80 static int tv_input_open_stream(struct tv_input_device*, int, tv_stream_t*)
81 {
82 return -EINVAL;
83 }
84
tv_input_close_stream(struct tv_input_device *,int,int)85 static int tv_input_close_stream(struct tv_input_device*, int, int)
86 {
87 return -EINVAL;
88 }
89
tv_input_request_capture(struct tv_input_device *,int,int,buffer_handle_t,uint32_t)90 static int tv_input_request_capture(
91 struct tv_input_device*, int, int, buffer_handle_t, uint32_t)
92 {
93 return -EINVAL;
94 }
95
tv_input_cancel_capture(struct tv_input_device *,int,int,uint32_t)96 static int tv_input_cancel_capture(struct tv_input_device*, int, int, uint32_t)
97 {
98 return -EINVAL;
99 }
100
101 /*****************************************************************************/
102
tv_input_device_close(struct hw_device_t * dev)103 static int tv_input_device_close(struct hw_device_t *dev)
104 {
105 tv_input_private_t* priv = (tv_input_private_t*)dev;
106 if (priv) {
107 free(priv);
108 }
109 return 0;
110 }
111
112 /*****************************************************************************/
113
tv_input_device_open(const struct hw_module_t * module,const char * name,struct hw_device_t ** device)114 static int tv_input_device_open(const struct hw_module_t* module,
115 const char* name, struct hw_device_t** device)
116 {
117 int status = -EINVAL;
118 if (!strcmp(name, TV_INPUT_DEFAULT_DEVICE)) {
119 tv_input_private_t* dev = (tv_input_private_t*)malloc(sizeof(*dev));
120
121 /* initialize our state here */
122 memset(dev, 0, sizeof(*dev));
123
124 /* initialize the procs */
125 dev->device.common.tag = HARDWARE_DEVICE_TAG;
126 dev->device.common.version = TV_INPUT_DEVICE_API_VERSION_0_1;
127 dev->device.common.module = const_cast<hw_module_t*>(module);
128 dev->device.common.close = tv_input_device_close;
129
130 dev->device.initialize = tv_input_initialize;
131 dev->device.get_stream_configurations =
132 tv_input_get_stream_configurations;
133 dev->device.open_stream = tv_input_open_stream;
134 dev->device.close_stream = tv_input_close_stream;
135 dev->device.request_capture = tv_input_request_capture;
136 dev->device.cancel_capture = tv_input_cancel_capture;
137
138 *device = &dev->device.common;
139 status = 0;
140 }
141 return status;
142 }
143