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                                       uint32_t channels,
102                                       audio_output_flags_t flags)
103{
104    return 0;
105}
106
107static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
108                           audio_stream_type_t stream, int session)
109{
110    return -ENOSYS;
111}
112
113static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
114                          audio_stream_type_t stream, int session)
115{
116    return -ENOSYS;
117}
118
119static void ap_release_output(struct audio_policy *pol,
120                              audio_io_handle_t output)
121{
122}
123
124static audio_io_handle_t ap_get_input(struct audio_policy *pol, audio_source_t inputSource,
125                                      uint32_t sampling_rate,
126                                      audio_format_t format,
127                                      uint32_t channels,
128                                      audio_in_acoustics_t acoustics)
129{
130    return 0;
131}
132
133static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
134{
135    return -ENOSYS;
136}
137
138static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
139{
140    return -ENOSYS;
141}
142
143static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
144{
145}
146
147static void ap_init_stream_volume(struct audio_policy *pol,
148                                  audio_stream_type_t stream, int index_min,
149                                  int index_max)
150{
151}
152
153static int ap_set_stream_volume_index(struct audio_policy *pol,
154                                      audio_stream_type_t stream,
155                                      int index)
156{
157    return -ENOSYS;
158}
159
160static int ap_get_stream_volume_index(const struct audio_policy *pol,
161                                      audio_stream_type_t stream,
162                                      int *index)
163{
164    return -ENOSYS;
165}
166
167static int ap_set_stream_volume_index_for_device(struct audio_policy *pol,
168                                      audio_stream_type_t stream,
169                                      int index,
170                                      audio_devices_t device)
171{
172    return -ENOSYS;
173}
174
175static int ap_get_stream_volume_index_for_device(const struct audio_policy *pol,
176                                      audio_stream_type_t stream,
177                                      int *index,
178                                      audio_devices_t device)
179{
180    return -ENOSYS;
181}
182
183static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
184                                           audio_stream_type_t stream)
185{
186    return 0;
187}
188
189static audio_devices_t ap_get_devices_for_stream(const struct audio_policy *pol,
190                                          audio_stream_type_t stream)
191{
192    return 0;
193}
194
195static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
196                                            struct effect_descriptor_s *desc)
197{
198    return 0;
199}
200
201static int ap_register_effect(struct audio_policy *pol,
202                              struct effect_descriptor_s *desc,
203                              audio_io_handle_t output,
204                              uint32_t strategy,
205                              int session,
206                              int id)
207{
208    return -ENOSYS;
209}
210
211static int ap_unregister_effect(struct audio_policy *pol, int id)
212{
213    return -ENOSYS;
214}
215
216static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
217{
218    return -ENOSYS;
219}
220
221static bool ap_is_stream_active(const struct audio_policy *pol, audio_stream_type_t stream,
222                                uint32_t in_past_ms)
223{
224    return false;
225}
226
227static int ap_dump(const struct audio_policy *pol, int fd)
228{
229    return -ENOSYS;
230}
231
232static int create_default_ap(const struct audio_policy_device *device,
233                             struct audio_policy_service_ops *aps_ops,
234                             void *service,
235                             struct audio_policy **ap)
236{
237    struct default_ap_device *dev;
238    struct default_audio_policy *dap;
239    int ret;
240
241    *ap = NULL;
242
243    if (!service || !aps_ops)
244        return -EINVAL;
245
246    dap = (struct default_audio_policy *)calloc(1, sizeof(*dap));
247    if (!dap)
248        return -ENOMEM;
249
250    dap->policy.set_device_connection_state = ap_set_device_connection_state;
251    dap->policy.get_device_connection_state = ap_get_device_connection_state;
252    dap->policy.set_phone_state = ap_set_phone_state;
253    dap->policy.set_ringer_mode = ap_set_ringer_mode;
254    dap->policy.set_force_use = ap_set_force_use;
255    dap->policy.get_force_use = ap_get_force_use;
256    dap->policy.set_can_mute_enforced_audible =
257        ap_set_can_mute_enforced_audible;
258    dap->policy.init_check = ap_init_check;
259    dap->policy.get_output = ap_get_output;
260    dap->policy.start_output = ap_start_output;
261    dap->policy.stop_output = ap_stop_output;
262    dap->policy.release_output = ap_release_output;
263    dap->policy.get_input = ap_get_input;
264    dap->policy.start_input = ap_start_input;
265    dap->policy.stop_input = ap_stop_input;
266    dap->policy.release_input = ap_release_input;
267    dap->policy.init_stream_volume = ap_init_stream_volume;
268    dap->policy.set_stream_volume_index = ap_set_stream_volume_index;
269    dap->policy.get_stream_volume_index = ap_get_stream_volume_index;
270    dap->policy.set_stream_volume_index_for_device = ap_set_stream_volume_index_for_device;
271    dap->policy.get_stream_volume_index_for_device = ap_get_stream_volume_index_for_device;
272    dap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
273    dap->policy.get_devices_for_stream = ap_get_devices_for_stream;
274    dap->policy.get_output_for_effect = ap_get_output_for_effect;
275    dap->policy.register_effect = ap_register_effect;
276    dap->policy.unregister_effect = ap_unregister_effect;
277    dap->policy.set_effect_enabled = ap_set_effect_enabled;
278    dap->policy.is_stream_active = ap_is_stream_active;
279    dap->policy.dump = ap_dump;
280
281    dap->service = service;
282    dap->aps_ops = aps_ops;
283
284    *ap = &dap->policy;
285    return 0;
286}
287
288static int destroy_default_ap(const struct audio_policy_device *ap_dev,
289                              struct audio_policy *ap)
290{
291    free(ap);
292    return 0;
293}
294
295static int default_ap_dev_close(hw_device_t* device)
296{
297    free(device);
298    return 0;
299}
300
301static int default_ap_dev_open(const hw_module_t* module, const char* name,
302                               hw_device_t** device)
303{
304    struct default_ap_device *dev;
305
306    *device = NULL;
307
308    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
309        return -EINVAL;
310
311    dev = (struct default_ap_device *)calloc(1, sizeof(*dev));
312    if (!dev)
313        return -ENOMEM;
314
315    dev->device.common.tag = HARDWARE_DEVICE_TAG;
316    dev->device.common.version = 0;
317    dev->device.common.module = (hw_module_t *)module;
318    dev->device.common.close = default_ap_dev_close;
319    dev->device.create_audio_policy = create_default_ap;
320    dev->device.destroy_audio_policy = destroy_default_ap;
321
322    *device = &dev->device.common;
323
324    return 0;
325}
326
327static struct hw_module_methods_t default_ap_module_methods = {
328    .open = default_ap_dev_open,
329};
330
331struct default_ap_module HAL_MODULE_INFO_SYM = {
332    .module = {
333        .common = {
334            .tag            = HARDWARE_MODULE_TAG,
335            .version_major  = 1,
336            .version_minor  = 0,
337            .id             = AUDIO_POLICY_HARDWARE_MODULE_ID,
338            .name           = "Default audio policy HAL",
339            .author         = "The Android Open Source Project",
340            .methods        = &default_ap_module_methods,
341        },
342    },
343};
344