audio_policy.c revision fe79eb3f06967f863a637e546eb4421d0da2283b 
1/*
2 * Copyright (C) 2011 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#define LOG_TAG "audio_policy_default"
18//#define LOG_NDEBUG 0
19
20#include <errno.h>
21#include <stdint.h>
22#include <stdlib.h>
23#include <string.h>
24
25#include <hardware/hardware.h>
26#include <system/audio.h>
27#include <system/audio_policy.h>
28#include <hardware/audio_policy.h>
29
30struct default_ap_module {
31    struct audio_policy_module module;
32};
33
34struct default_ap_device {
35    struct audio_policy_device device;
36};
37
38struct default_audio_policy {
39    struct audio_policy policy;
40
41    struct audio_policy_service_ops *aps_ops;
42    void *service;
43};
44
45static int ap_set_device_connection_state(struct audio_policy *pol,
46                                          audio_devices_t device,
47                                          audio_policy_dev_state_t state,
48                                          const char *device_address)
49{
50    return -ENOSYS;
51}
52
53static audio_policy_dev_state_t ap_get_device_connection_state(
54                                            const struct audio_policy *pol,
55                                            audio_devices_t device,
56                                            const char *device_address)
57{
58    return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
59}
60
61static void ap_set_phone_state(struct audio_policy *pol, int state)
62{
63}
64
65static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
66                               uint32_t mask)
67{
68}
69
70static void ap_set_force_use(struct audio_policy *pol,
71                          audio_policy_force_use_t usage,
72                          audio_policy_forced_cfg_t config)
73{
74}
75
76    /* retreive current device category forced for a given usage */
77static audio_policy_forced_cfg_t ap_get_force_use(
78                                               const struct audio_policy *pol,
79                                               audio_policy_force_use_t usage)
80{
81    return AUDIO_POLICY_FORCE_NONE;
82}
83
84/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
85 * can still be muted. */
86static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
87                                             bool can_mute)
88{
89}
90
91static int ap_init_check(const struct audio_policy *pol)
92{
93    return 0;
94}
95
96static audio_io_handle_t ap_get_output(struct audio_policy *pol,
97                                       audio_stream_type_t stream,
98                                       uint32_t sampling_rate,
99                                       audio_format_t format,
100                                       uint32_t channels,
101                                       audio_policy_output_flags_t flags)
102{
103    return 0;
104}
105
106static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
107                           audio_stream_type_t stream, int session)
108{
109    return -ENOSYS;
110}
111
112static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
113                          audio_stream_type_t stream, int session)
114{
115    return -ENOSYS;
116}
117
118static void ap_release_output(struct audio_policy *pol,
119                              audio_io_handle_t output)
120{
121}
122
123static audio_io_handle_t ap_get_input(struct audio_policy *pol, int inputSource,
124                                      uint32_t sampling_rate,
125                                      audio_format_t format,
126                                      uint32_t channels,
127                                      audio_in_acoustics_t acoustics)
128{
129    return 0;
130}
131
132static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
133{
134    return -ENOSYS;
135}
136
137static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
138{
139    return -ENOSYS;
140}
141
142static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
143{
144}
145
146static void ap_init_stream_volume(struct audio_policy *pol,
147                                  audio_stream_type_t stream, int index_min,
148                                  int index_max)
149{
150}
151
152static int ap_set_stream_volume_index(struct audio_policy *pol,
153                                      audio_stream_type_t stream,
154                                      int index)
155{
156    return -ENOSYS;
157}
158
159static int ap_get_stream_volume_index(const struct audio_policy *pol,
160                                      audio_stream_type_t stream,
161                                      int *index)
162{
163    return -ENOSYS;
164}
165
166static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
167                                           audio_stream_type_t stream)
168{
169    return 0;
170}
171
172static uint32_t ap_get_devices_for_stream(const struct audio_policy *pol,
173                                          audio_stream_type_t stream)
174{
175    return 0;
176}
177
178static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
179                                            struct effect_descriptor_s *desc)
180{
181    return 0;
182}
183
184static int ap_register_effect(struct audio_policy *pol,
185                              struct effect_descriptor_s *desc,
186                              audio_io_handle_t output,
187                              uint32_t strategy,
188                              int session,
189                              int id)
190{
191    return -ENOSYS;
192}
193
194static int ap_unregister_effect(struct audio_policy *pol, int id)
195{
196    return -ENOSYS;
197}
198
199static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
200{
201    return -ENOSYS;
202}
203
204static bool ap_is_stream_active(const struct audio_policy *pol, int stream,
205                                uint32_t in_past_ms)
206{
207    return false;
208}
209
210static int ap_dump(const struct audio_policy *pol, int fd)
211{
212    return -ENOSYS;
213}
214
215static int create_default_ap(const struct audio_policy_device *device,
216                             struct audio_policy_service_ops *aps_ops,
217                             void *service,
218                             struct audio_policy **ap)
219{
220    struct default_ap_device *dev;
221    struct default_audio_policy *dap;
222    int ret;
223
224    *ap = NULL;
225
226    if (!service || !aps_ops)
227        return -EINVAL;
228
229    dap = (struct default_audio_policy *)calloc(1, sizeof(*dap));
230    if (!dap)
231        return -ENOMEM;
232
233    dap->policy.set_device_connection_state = ap_set_device_connection_state;
234    dap->policy.get_device_connection_state = ap_get_device_connection_state;
235    dap->policy.set_phone_state = ap_set_phone_state;
236    dap->policy.set_ringer_mode = ap_set_ringer_mode;
237    dap->policy.set_force_use = ap_set_force_use;
238    dap->policy.get_force_use = ap_get_force_use;
239    dap->policy.set_can_mute_enforced_audible =
240        ap_set_can_mute_enforced_audible;
241    dap->policy.init_check = ap_init_check;
242    dap->policy.get_output = ap_get_output;
243    dap->policy.start_output = ap_start_output;
244    dap->policy.stop_output = ap_stop_output;
245    dap->policy.release_output = ap_release_output;
246    dap->policy.get_input = ap_get_input;
247    dap->policy.start_input = ap_start_input;
248    dap->policy.stop_input = ap_stop_input;
249    dap->policy.release_input = ap_release_input;
250    dap->policy.init_stream_volume = ap_init_stream_volume;
251    dap->policy.set_stream_volume_index = ap_set_stream_volume_index;
252    dap->policy.get_stream_volume_index = ap_get_stream_volume_index;
253    dap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
254    dap->policy.get_devices_for_stream = ap_get_devices_for_stream;
255    dap->policy.get_output_for_effect = ap_get_output_for_effect;
256    dap->policy.register_effect = ap_register_effect;
257    dap->policy.unregister_effect = ap_unregister_effect;
258    dap->policy.set_effect_enabled = ap_set_effect_enabled;
259    dap->policy.is_stream_active = ap_is_stream_active;
260    dap->policy.dump = ap_dump;
261
262    dap->service = service;
263    dap->aps_ops = aps_ops;
264
265    *ap = &dap->policy;
266    return 0;
267}
268
269static int destroy_default_ap(const struct audio_policy_device *ap_dev,
270                              struct audio_policy *ap)
271{
272    free(ap);
273    return 0;
274}
275
276static int default_ap_dev_close(hw_device_t* device)
277{
278    free(device);
279    return 0;
280}
281
282static int default_ap_dev_open(const hw_module_t* module, const char* name,
283                               hw_device_t** device)
284{
285    struct default_ap_device *dev;
286
287    *device = NULL;
288
289    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
290        return -EINVAL;
291
292    dev = (struct default_ap_device *)calloc(1, sizeof(*dev));
293    if (!dev)
294        return -ENOMEM;
295
296    dev->device.common.tag = HARDWARE_DEVICE_TAG;
297    dev->device.common.version = 0;
298    dev->device.common.module = (hw_module_t *)module;
299    dev->device.common.close = default_ap_dev_close;
300    dev->device.create_audio_policy = create_default_ap;
301    dev->device.destroy_audio_policy = destroy_default_ap;
302
303    *device = &dev->device.common;
304
305    return 0;
306}
307
308static struct hw_module_methods_t default_ap_module_methods = {
309    .open = default_ap_dev_open,
310};
311
312struct default_ap_module HAL_MODULE_INFO_SYM = {
313    .module = {
314        .common = {
315            .tag            = HARDWARE_MODULE_TAG,
316            .version_major  = 1,
317            .version_minor  = 0,
318            .id             = AUDIO_POLICY_HARDWARE_MODULE_ID,
319            .name           = "Default audio policy HAL",
320            .author         = "The Android Open Source Project",
321            .methods        = &default_ap_module_methods,
322        },
323    },
324};
325