1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
* Copyright (C) 2015, The CyanogenMod 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.
*/
#ifndef CM_AUDIO_AMPLIFIER_INTERFACE_H
#define CM_AUDIO_AMPLIFIER_INTERFACE_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <hardware/audio.h>
#include <hardware/hardware.h>
#include <system/audio.h>
__BEGIN_DECLS
#define AMPLIFIER_HARDWARE_MODULE_ID "audio_amplifier"
#define AMPLIFIER_HARDWARE_INTERFACE "audio_amplifier_hw_if"
#define AMPLIFIER_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1)
#define AMPLIFIER_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION(1, 0)
#define AMPLIFIER_DEVICE_API_VERSION_2_0 HARDWARE_DEVICE_API_VERSION(2, 0)
#define AMPLIFIER_DEVICE_API_VERSION_CURRENT AMPLIFIER_DEVICE_API_VERSION_2_0
typedef struct amplifier_device {
/**
* Common methods of the amplifier device. This *must* be the first member
* of amplifier_device as users of this structure will cast a hw_device_t
* to amplifier_device pointer in contexts where it's known
* the hw_device_t references a amplifier_device.
*/
struct hw_device_t common;
/**
* Notify amplifier device of current input devices
*
* This function should handle only input devices.
*/
int (*set_input_devices)(struct amplifier_device *device, uint32_t devices);
/**
* Notify amplifier device of current output devices
*
* This function should handle only output devices.
*/
int (*set_output_devices)(struct amplifier_device *device, uint32_t devices);
/**
* Notify amplifier device about current audio mode
*/
int (*set_mode)(struct amplifier_device *device, audio_mode_t mode);
/**
* Notify amplifier device that an output stream has started
*/
int (*output_stream_start)(struct amplifier_device *device,
struct audio_stream_out *stream, bool offload);
/**
* Notify amplifier device that an input stream has started
*/
int (*input_stream_start)(struct amplifier_device *device,
struct audio_stream_in *stream);
/**
* Notify amplifier device that an output stream has stopped
*/
int (*output_stream_standby)(struct amplifier_device *device,
struct audio_stream_out *stream);
/**
* Notify amplifier device that an input stream has stopped
*/
int (*input_stream_standby)(struct amplifier_device *device,
struct audio_stream_in *stream);
} amplifier_device_t;
typedef struct amplifier_module {
/**
* Common methods of the amplifier module. This *must* be the first member
* of amplifier_module as users of this structure will cast a hw_module_t
* to amplifier_module pointer in contexts where it's known
* the hw_module_t references a amplifier_module.
*/
struct hw_module_t common;
} amplifier_module_t;
/** convenience API for opening and closing a supported device */
static inline int amplifier_device_open(const struct hw_module_t *module,
struct amplifier_device **device)
{
return module->methods->open(module, AMPLIFIER_HARDWARE_INTERFACE,
(struct hw_device_t **) device);
}
static inline int amplifier_device_close(struct amplifier_device *device)
{
return device->common.close(&device->common);
}
__END_DECLS
#endif // CM_AUDIO_AMPLIFIER_INTERFACE_H
|
