audio_policy_hal.cpp revision 582a15744be109fb630db7dbd1d1bdf22ff44f12 
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 "legacy_audio_policy_hal"
18//#define LOG_NDEBUG 0
19
20#include <stdint.h>
21
22#include <hardware/hardware.h>
23#include <system/audio.h>
24#include <system/audio_policy.h>
25#include <hardware/audio_policy.h>
26
27#include <hardware_legacy/AudioPolicyInterface.h>
28#include <hardware_legacy/AudioSystemLegacy.h>
29
30#include "AudioPolicyCompatClient.h"
31
32namespace android_audio_legacy {
33
34extern "C" {
35
36struct legacy_ap_module {
37    struct audio_policy_module module;
38};
39
40struct legacy_ap_device {
41    struct audio_policy_device device;
42};
43
44struct legacy_audio_policy {
45    struct audio_policy policy;
46
47    void *service;
48    struct audio_policy_service_ops *aps_ops;
49    AudioPolicyCompatClient *service_client;
50    AudioPolicyInterface *apm;
51};
52
53static inline struct legacy_audio_policy * to_lap(struct audio_policy *pol)
54{
55    return reinterpret_cast<struct legacy_audio_policy *>(pol);
56}
57
58static inline const struct legacy_audio_policy * to_clap(const struct audio_policy *pol)
59{
60    return reinterpret_cast<const struct legacy_audio_policy *>(pol);
61}
62
63
64static int ap_set_device_connection_state(struct audio_policy *pol,
65                                          audio_devices_t device,
66                                          audio_policy_dev_state_t state,
67                                          const char *device_address)
68{
69    struct legacy_audio_policy *lap = to_lap(pol);
70    return lap->apm->setDeviceConnectionState(
71                    (AudioSystem::audio_devices)device,
72                    (AudioSystem::device_connection_state)state,
73                    device_address);
74}
75
76static audio_policy_dev_state_t ap_get_device_connection_state(
77                                            const struct audio_policy *pol,
78                                            audio_devices_t device,
79                                            const char *device_address)
80{
81    const struct legacy_audio_policy *lap = to_clap(pol);
82    return (audio_policy_dev_state_t)lap->apm->getDeviceConnectionState(
83                    (AudioSystem::audio_devices)device,
84                    device_address);
85}
86
87static void ap_set_phone_state(struct audio_policy *pol, int state)
88{
89    struct legacy_audio_policy *lap = to_lap(pol);
90    lap->apm->setPhoneState(state);
91}
92
93    /* indicate a change in ringer mode */
94static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
95                               uint32_t mask)
96{
97    struct legacy_audio_policy *lap = to_lap(pol);
98    lap->apm->setRingerMode(mode, mask);
99}
100
101    /* force using a specific device category for the specified usage */
102static void ap_set_force_use(struct audio_policy *pol,
103                          audio_policy_force_use_t usage,
104                          audio_policy_forced_cfg_t config)
105{
106    struct legacy_audio_policy *lap = to_lap(pol);
107    lap->apm->setForceUse((AudioSystem::force_use)usage,
108                          (AudioSystem::forced_config)config);
109}
110
111    /* retreive current device category forced for a given usage */
112static audio_policy_forced_cfg_t ap_get_force_use(
113                                               const struct audio_policy *pol,
114                                               audio_policy_force_use_t usage)
115{
116    const struct legacy_audio_policy *lap = to_clap(pol);
117    return (audio_policy_forced_cfg_t)lap->apm->getForceUse(
118                          (AudioSystem::force_use)usage);
119}
120
121/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
122 * can still be muted. */
123static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
124                                             bool can_mute)
125{
126    struct legacy_audio_policy *lap = to_lap(pol);
127    lap->apm->setSystemProperty("ro.camera.sound.forced", can_mute ? "0" : "1");
128}
129
130static int ap_init_check(const struct audio_policy *pol)
131{
132    const struct legacy_audio_policy *lap = to_clap(pol);
133    return lap->apm->initCheck();
134}
135
136static audio_io_handle_t ap_get_output(struct audio_policy *pol,
137                                       audio_stream_type_t stream,
138                                       uint32_t sampling_rate,
139                                       uint32_t format,
140                                       uint32_t channels,
141                                       audio_policy_output_flags_t flags)
142{
143    struct legacy_audio_policy *lap = to_lap(pol);
144
145    LOGV("%s: tid %d", __func__, gettid());
146    return lap->apm->getOutput((AudioSystem::stream_type)stream,
147                               sampling_rate, format, channels,
148                               (AudioSystem::output_flags)flags);
149}
150
151static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
152                           audio_stream_type_t stream, int session)
153{
154    struct legacy_audio_policy *lap = to_lap(pol);
155    return lap->apm->startOutput(output, (AudioSystem::stream_type)stream,
156                                 session);
157}
158
159static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
160                          audio_stream_type_t stream, int session)
161{
162    struct legacy_audio_policy *lap = to_lap(pol);
163    return lap->apm->stopOutput(output, (AudioSystem::stream_type)stream,
164                                session);
165}
166
167static void ap_release_output(struct audio_policy *pol,
168                              audio_io_handle_t output)
169{
170    struct legacy_audio_policy *lap = to_lap(pol);
171    lap->apm->releaseOutput(output);
172}
173
174static audio_io_handle_t ap_get_input(struct audio_policy *pol, int inputSource,
175                                      uint32_t sampling_rate,
176                                      uint32_t format,
177                                      uint32_t channels,
178                                      audio_in_acoustics_t acoustics)
179{
180    struct legacy_audio_policy *lap = to_lap(pol);
181    return lap->apm->getInput(inputSource, sampling_rate, format, channels,
182                              (AudioSystem::audio_in_acoustics)acoustics);
183}
184
185static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
186{
187    struct legacy_audio_policy *lap = to_lap(pol);
188    return lap->apm->startInput(input);
189}
190
191static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
192{
193    struct legacy_audio_policy *lap = to_lap(pol);
194    return lap->apm->stopInput(input);
195}
196
197static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
198{
199    struct legacy_audio_policy *lap = to_lap(pol);
200    lap->apm->releaseInput(input);
201}
202
203static void ap_init_stream_volume(struct audio_policy *pol,
204                                  audio_stream_type_t stream, int index_min,
205                                  int index_max)
206{
207    struct legacy_audio_policy *lap = to_lap(pol);
208    lap->apm->initStreamVolume((AudioSystem::stream_type)stream, index_min,
209                               index_max);
210}
211
212static int ap_set_stream_volume_index(struct audio_policy *pol,
213                                      audio_stream_type_t stream,
214                                      int index)
215{
216    struct legacy_audio_policy *lap = to_lap(pol);
217    return lap->apm->setStreamVolumeIndex((AudioSystem::stream_type)stream,
218                                          index);
219}
220
221static int ap_get_stream_volume_index(const struct audio_policy *pol,
222                                      audio_stream_type_t stream,
223                                      int *index)
224{
225    const struct legacy_audio_policy *lap = to_clap(pol);
226    return lap->apm->getStreamVolumeIndex((AudioSystem::stream_type)stream,
227                                          index);
228}
229
230static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
231                                           audio_stream_type_t stream)
232{
233    const struct legacy_audio_policy *lap = to_clap(pol);
234    return lap->apm->getStrategyForStream((AudioSystem::stream_type)stream);
235}
236
237static uint32_t ap_get_devices_for_stream(const struct audio_policy *pol,
238                                       audio_stream_type_t stream)
239{
240    const struct legacy_audio_policy *lap = to_clap(pol);
241    return lap->apm->getDevicesForStream((AudioSystem::stream_type)stream);
242}
243
244static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
245                                            struct effect_descriptor_s *desc)
246{
247    struct legacy_audio_policy *lap = to_lap(pol);
248    return lap->apm->getOutputForEffect(desc);
249}
250
251static int ap_register_effect(struct audio_policy *pol,
252                              struct effect_descriptor_s *desc,
253                              audio_io_handle_t io,
254                              uint32_t strategy,
255                              int session,
256                              int id)
257{
258    struct legacy_audio_policy *lap = to_lap(pol);
259    return lap->apm->registerEffect(desc, io, strategy, session, id);
260}
261
262static int ap_unregister_effect(struct audio_policy *pol, int id)
263{
264    struct legacy_audio_policy *lap = to_lap(pol);
265    return lap->apm->unregisterEffect(id);
266}
267
268static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
269{
270    struct legacy_audio_policy *lap = to_lap(pol);
271    return lap->apm->setEffectEnabled(id, enabled);
272}
273
274static bool ap_is_stream_active(const struct audio_policy *pol, int stream,
275                                uint32_t in_past_ms)
276{
277    const struct legacy_audio_policy *lap = to_clap(pol);
278    return lap->apm->isStreamActive(stream, in_past_ms);
279}
280
281static int ap_dump(const struct audio_policy *pol, int fd)
282{
283    const struct legacy_audio_policy *lap = to_clap(pol);
284    return lap->apm->dump(fd);
285}
286
287static int create_legacy_ap(const struct audio_policy_device *device,
288                            struct audio_policy_service_ops *aps_ops,
289                            void *service,
290                            struct audio_policy **ap)
291{
292    struct legacy_audio_policy *lap;
293    int ret;
294
295    if (!service || !aps_ops)
296        return -EINVAL;
297
298    lap = (struct legacy_audio_policy *)calloc(1, sizeof(*lap));
299    if (!lap)
300        return -ENOMEM;
301
302    lap->policy.set_device_connection_state = ap_set_device_connection_state;
303    lap->policy.get_device_connection_state = ap_get_device_connection_state;
304    lap->policy.set_phone_state = ap_set_phone_state;
305    lap->policy.set_ringer_mode = ap_set_ringer_mode;
306    lap->policy.set_force_use = ap_set_force_use;
307    lap->policy.get_force_use = ap_get_force_use;
308    lap->policy.set_can_mute_enforced_audible =
309        ap_set_can_mute_enforced_audible;
310    lap->policy.init_check = ap_init_check;
311    lap->policy.get_output = ap_get_output;
312    lap->policy.start_output = ap_start_output;
313    lap->policy.stop_output = ap_stop_output;
314    lap->policy.release_output = ap_release_output;
315    lap->policy.get_input = ap_get_input;
316    lap->policy.start_input = ap_start_input;
317    lap->policy.stop_input = ap_stop_input;
318    lap->policy.release_input = ap_release_input;
319    lap->policy.init_stream_volume = ap_init_stream_volume;
320    lap->policy.set_stream_volume_index = ap_set_stream_volume_index;
321    lap->policy.get_stream_volume_index = ap_get_stream_volume_index;
322    lap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
323    lap->policy.get_devices_for_stream = ap_get_devices_for_stream;
324    lap->policy.get_output_for_effect = ap_get_output_for_effect;
325    lap->policy.register_effect = ap_register_effect;
326    lap->policy.unregister_effect = ap_unregister_effect;
327    lap->policy.set_effect_enabled = ap_set_effect_enabled;
328    lap->policy.is_stream_active = ap_is_stream_active;
329    lap->policy.dump = ap_dump;
330
331    lap->service = service;
332    lap->aps_ops = aps_ops;
333    lap->service_client =
334        new AudioPolicyCompatClient(aps_ops, service);
335    if (!lap->service_client) {
336        ret = -ENOMEM;
337        goto err_new_compat_client;
338    }
339
340    lap->apm = createAudioPolicyManager(lap->service_client);
341    if (!lap->apm) {
342        ret = -ENOMEM;
343        goto err_create_apm;
344    }
345
346    *ap = &lap->policy;
347    return 0;
348
349err_create_apm:
350    delete lap->service_client;
351err_new_compat_client:
352    free(lap);
353    *ap = NULL;
354    return ret;
355}
356
357static int destroy_legacy_ap(const struct audio_policy_device *ap_dev,
358                             struct audio_policy *ap)
359{
360    struct legacy_audio_policy *lap = to_lap(ap);
361
362    if (!lap)
363        return 0;
364
365    if (lap->apm)
366        destroyAudioPolicyManager(lap->apm);
367    if (lap->service_client)
368        delete lap->service_client;
369    free(lap);
370    return 0;
371}
372
373static int legacy_ap_dev_close(hw_device_t* device)
374{
375    if (device)
376        free(device);
377    return 0;
378}
379
380static int legacy_ap_dev_open(const hw_module_t* module, const char* name,
381                                    hw_device_t** device)
382{
383    struct legacy_ap_device *dev;
384
385    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
386        return -EINVAL;
387
388    dev = (struct legacy_ap_device *)calloc(1, sizeof(*dev));
389    if (!dev)
390        return -ENOMEM;
391
392    dev->device.common.tag = HARDWARE_DEVICE_TAG;
393    dev->device.common.version = 0;
394    dev->device.common.module = const_cast<hw_module_t*>(module);
395    dev->device.common.close = legacy_ap_dev_close;
396    dev->device.create_audio_policy = create_legacy_ap;
397    dev->device.destroy_audio_policy = destroy_legacy_ap;
398
399    *device = &dev->device.common;
400
401    return 0;
402}
403
404static struct hw_module_methods_t legacy_ap_module_methods = {
405        open: legacy_ap_dev_open
406};
407
408struct legacy_ap_module HAL_MODULE_INFO_SYM = {
409    module: {
410        common: {
411            tag: HARDWARE_MODULE_TAG,
412            version_major: 1,
413            version_minor: 0,
414            id: AUDIO_POLICY_HARDWARE_MODULE_ID,
415            name: "LEGACY Audio Policy HAL",
416            author: "The Android Open Source Project",
417            methods: &legacy_ap_module_methods,
418            dso : NULL,
419            reserved : {0},
420        },
421    },
422};
423
424}; // extern "C"
425
426}; // namespace android_audio_legacy
427