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, audio_mode_t state)
62{
63}
64
65// deprecated, never called
66static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
67                               uint32_t mask)
68{
69}
70
71static void ap_set_force_use(struct audio_policy *pol,
72                          audio_policy_force_use_t usage,
73                          audio_policy_forced_cfg_t config)
74{
75}
76
77    /* retreive current device category forced for a given usage */
78static audio_policy_forced_cfg_t ap_get_force_use(
79                                               const struct audio_policy *pol,
80                                               audio_policy_force_use_t usage)
81{
82    return AUDIO_POLICY_FORCE_NONE;
83}
84
85/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
86 * can still be muted. */
87static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
88                                             bool can_mute)
89{
90}
91
92static int ap_init_check(const struct audio_policy *pol)
93{
94    return 0;
95}
96
97static audio_io_handle_t ap_get_output(struct audio_policy *pol,
98                                       audio_stream_type_t stream,
99                                       uint32_t sampling_rate,
100                                       audio_format_t format,
101                                       audio_channel_mask_t channelMask,
102                                       audio_output_flags_t flags,
103                                       const audio_offload_info_t *info)
104{
105    return 0;
106}
107
108static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
109                           audio_stream_type_t stream, int session)
110{
111    return -ENOSYS;
112}
113
114static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
115                          audio_stream_type_t stream, int session)
116{
117    return -ENOSYS;
118}
119
120static void ap_release_output(struct audio_policy *pol,
121                              audio_io_handle_t output)
122{
123}
124
125static audio_io_handle_t ap_get_input(struct audio_policy *pol, audio_source_t inputSource,
126                                      uint32_t sampling_rate,
127                                      audio_format_t format,
128                                      audio_channel_mask_t channelMask,
129                                      audio_in_acoustics_t acoustics)
130{
131    return 0;
132}
133
134static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
135{
136    return -ENOSYS;
137}
138
139static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
140{
141    return -ENOSYS;
142}
143
144static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
145{
146}
147
148static void ap_init_stream_volume(struct audio_policy *pol,
149                                  audio_stream_type_t stream, int index_min,
150                                  int index_max)
151{
152}
153
154static int ap_set_stream_volume_index(struct audio_policy *pol,
155                                      audio_stream_type_t stream,
156                                      int index)
157{
158    return -ENOSYS;
159}
160
161static int ap_get_stream_volume_index(const struct audio_policy *pol,
162                                      audio_stream_type_t stream,
163                                      int *index)
164{
165    return -ENOSYS;
166}
167
168static int ap_set_stream_volume_index_for_device(struct audio_policy *pol,
169                                      audio_stream_type_t stream,
170                                      int index,
171                                      audio_devices_t device)
172{
173    return -ENOSYS;
174}
175
176static int ap_get_stream_volume_index_for_device(const struct audio_policy *pol,
177                                      audio_stream_type_t stream,
178                                      int *index,
179                                      audio_devices_t device)
180{
181    return -ENOSYS;
182}
183
184static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
185                                           audio_stream_type_t stream)
186{
187    return 0;
188}
189
190static audio_devices_t ap_get_devices_for_stream(const struct audio_policy *pol,
191                                          audio_stream_type_t stream)
192{
193    return 0;
194}
195
196static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
197                                            const struct effect_descriptor_s *desc)
198{
199    return 0;
200}
201
202static int ap_register_effect(struct audio_policy *pol,
203                              const struct effect_descriptor_s *desc,
204                              audio_io_handle_t output,
205                              uint32_t strategy,
206                              int session,
207                              int id)
208{
209    return -ENOSYS;
210}
211
212static int ap_unregister_effect(struct audio_policy *pol, int id)
213{
214    return -ENOSYS;
215}
216
217static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
218{
219    return -ENOSYS;
220}
221
222static bool ap_is_stream_active(const struct audio_policy *pol, audio_stream_type_t stream,
223                                uint32_t in_past_ms)
224{
225    return false;
226}
227
228static int ap_dump(const struct audio_policy *pol, int fd)
229{
230    return -ENOSYS;
231}
232
233static bool ap_is_offload_supported(const struct audio_policy *pol,
234                                   const audio_offload_info_t *info)
235{
236    return false;
237}
238
239static int create_default_ap(const struct audio_policy_device *device,
240                             struct audio_policy_service_ops *aps_ops,
241                             void *service,
242                             struct audio_policy **ap)
243{
244    struct default_audio_policy *dap;
245
246    *ap = NULL;
247
248    if (!service || !aps_ops)
249        return -EINVAL;
250
251    dap = (struct default_audio_policy *)calloc(1, sizeof(*dap));
252    if (!dap)
253        return -ENOMEM;
254
255    dap->policy.set_device_connection_state = ap_set_device_connection_state;
256    dap->policy.get_device_connection_state = ap_get_device_connection_state;
257    dap->policy.set_phone_state = ap_set_phone_state;
258    dap->policy.set_ringer_mode = ap_set_ringer_mode;
259    dap->policy.set_force_use = ap_set_force_use;
260    dap->policy.get_force_use = ap_get_force_use;
261    dap->policy.set_can_mute_enforced_audible =
262        ap_set_can_mute_enforced_audible;
263    dap->policy.init_check = ap_init_check;
264    dap->policy.get_output = ap_get_output;
265    dap->policy.start_output = ap_start_output;
266    dap->policy.stop_output = ap_stop_output;
267    dap->policy.release_output = ap_release_output;
268    dap->policy.get_input = ap_get_input;
269    dap->policy.start_input = ap_start_input;
270    dap->policy.stop_input = ap_stop_input;
271    dap->policy.release_input = ap_release_input;
272    dap->policy.init_stream_volume = ap_init_stream_volume;
273    dap->policy.set_stream_volume_index = ap_set_stream_volume_index;
274    dap->policy.get_stream_volume_index = ap_get_stream_volume_index;
275    dap->policy.set_stream_volume_index_for_device = ap_set_stream_volume_index_for_device;
276    dap->policy.get_stream_volume_index_for_device = ap_get_stream_volume_index_for_device;
277    dap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
278    dap->policy.get_devices_for_stream = ap_get_devices_for_stream;
279    dap->policy.get_output_for_effect = ap_get_output_for_effect;
280    dap->policy.register_effect = ap_register_effect;
281    dap->policy.unregister_effect = ap_unregister_effect;
282    dap->policy.set_effect_enabled = ap_set_effect_enabled;
283    dap->policy.is_stream_active = ap_is_stream_active;
284    dap->policy.dump = ap_dump;
285
286    dap->policy.is_offload_supported = ap_is_offload_supported;
287
288    dap->service = service;
289    dap->aps_ops = aps_ops;
290
291    *ap = &dap->policy;
292    return 0;
293}
294
295static int destroy_default_ap(const struct audio_policy_device *ap_dev,
296                              struct audio_policy *ap)
297{
298    free(ap);
299    return 0;
300}
301
302static int default_ap_dev_close(hw_device_t* device)
303{
304    free(device);
305    return 0;
306}
307
308static int default_ap_dev_open(const hw_module_t* module, const char* name,
309                               hw_device_t** device)
310{
311    struct default_ap_device *dev;
312
313    *device = NULL;
314
315    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
316        return -EINVAL;
317
318    dev = (struct default_ap_device *)calloc(1, sizeof(*dev));
319    if (!dev)
320        return -ENOMEM;
321
322    dev->device.common.tag = HARDWARE_DEVICE_TAG;
323    dev->device.common.version = 0;
324    dev->device.common.module = (hw_module_t *)module;
325    dev->device.common.close = default_ap_dev_close;
326    dev->device.create_audio_policy = create_default_ap;
327    dev->device.destroy_audio_policy = destroy_default_ap;
328
329    *device = &dev->device.common;
330
331    return 0;
332}
333
334static struct hw_module_methods_t default_ap_module_methods = {
335    .open = default_ap_dev_open,
336};
337
338struct default_ap_module HAL_MODULE_INFO_SYM = {
339    .module = {
340        .common = {
341            .tag            = HARDWARE_MODULE_TAG,
342            .version_major  = 1,
343            .version_minor  = 0,
344            .id             = AUDIO_POLICY_HARDWARE_MODULE_ID,
345            .name           = "Default audio policy HAL",
346            .author         = "The Android Open Source Project",
347            .methods        = &default_ap_module_methods,
348        },
349    },
350};
351