audio_policy_hal.cpp revision 5c1ebdc9db8d7e5ff51704f80c55f460638eb095 
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, audio_mode_t state)
88{
89    struct legacy_audio_policy *lap = to_lap(pol);
90    // as this is the legacy API, don't change it to use audio_mode_t instead of int
91    lap->apm->setPhoneState((int) state);
92}
93
94    /* indicate a change in ringer mode */
95static void ap_set_ringer_mode(struct audio_policy *pol, uint32_t mode,
96                               uint32_t mask)
97{
98    struct legacy_audio_policy *lap = to_lap(pol);
99    lap->apm->setRingerMode(mode, mask);
100}
101
102    /* force using a specific device category for the specified usage */
103static void ap_set_force_use(struct audio_policy *pol,
104                          audio_policy_force_use_t usage,
105                          audio_policy_forced_cfg_t config)
106{
107    struct legacy_audio_policy *lap = to_lap(pol);
108    lap->apm->setForceUse((AudioSystem::force_use)usage,
109                          (AudioSystem::forced_config)config);
110}
111
112    /* retreive current device category forced for a given usage */
113static audio_policy_forced_cfg_t ap_get_force_use(
114                                               const struct audio_policy *pol,
115                                               audio_policy_force_use_t usage)
116{
117    const struct legacy_audio_policy *lap = to_clap(pol);
118    return (audio_policy_forced_cfg_t)lap->apm->getForceUse(
119                          (AudioSystem::force_use)usage);
120}
121
122/* if can_mute is true, then audio streams that are marked ENFORCED_AUDIBLE
123 * can still be muted. */
124static void ap_set_can_mute_enforced_audible(struct audio_policy *pol,
125                                             bool can_mute)
126{
127    struct legacy_audio_policy *lap = to_lap(pol);
128    lap->apm->setSystemProperty("ro.camera.sound.forced", can_mute ? "0" : "1");
129}
130
131static int ap_init_check(const struct audio_policy *pol)
132{
133    const struct legacy_audio_policy *lap = to_clap(pol);
134    return lap->apm->initCheck();
135}
136
137static audio_io_handle_t ap_get_output(struct audio_policy *pol,
138                                       audio_stream_type_t stream,
139                                       uint32_t sampling_rate,
140                                       uint32_t format,
141                                       uint32_t channels,
142                                       audio_policy_output_flags_t flags)
143{
144    struct legacy_audio_policy *lap = to_lap(pol);
145
146    ALOGV("%s: tid %d", __func__, gettid());
147    return lap->apm->getOutput((AudioSystem::stream_type)stream,
148                               sampling_rate, format, channels,
149                               (AudioSystem::output_flags)flags);
150}
151
152static int ap_start_output(struct audio_policy *pol, audio_io_handle_t output,
153                           audio_stream_type_t stream, int session)
154{
155    struct legacy_audio_policy *lap = to_lap(pol);
156    return lap->apm->startOutput(output, (AudioSystem::stream_type)stream,
157                                 session);
158}
159
160static int ap_stop_output(struct audio_policy *pol, audio_io_handle_t output,
161                          audio_stream_type_t stream, int session)
162{
163    struct legacy_audio_policy *lap = to_lap(pol);
164    return lap->apm->stopOutput(output, (AudioSystem::stream_type)stream,
165                                session);
166}
167
168static void ap_release_output(struct audio_policy *pol,
169                              audio_io_handle_t output)
170{
171    struct legacy_audio_policy *lap = to_lap(pol);
172    lap->apm->releaseOutput(output);
173}
174
175static audio_io_handle_t ap_get_input(struct audio_policy *pol, int inputSource,
176                                      uint32_t sampling_rate,
177                                      uint32_t format,
178                                      uint32_t channels,
179                                      audio_in_acoustics_t acoustics)
180{
181    struct legacy_audio_policy *lap = to_lap(pol);
182    return lap->apm->getInput(inputSource, sampling_rate, format, channels,
183                              (AudioSystem::audio_in_acoustics)acoustics);
184}
185
186static int ap_start_input(struct audio_policy *pol, audio_io_handle_t input)
187{
188    struct legacy_audio_policy *lap = to_lap(pol);
189    return lap->apm->startInput(input);
190}
191
192static int ap_stop_input(struct audio_policy *pol, audio_io_handle_t input)
193{
194    struct legacy_audio_policy *lap = to_lap(pol);
195    return lap->apm->stopInput(input);
196}
197
198static void ap_release_input(struct audio_policy *pol, audio_io_handle_t input)
199{
200    struct legacy_audio_policy *lap = to_lap(pol);
201    lap->apm->releaseInput(input);
202}
203
204static void ap_init_stream_volume(struct audio_policy *pol,
205                                  audio_stream_type_t stream, int index_min,
206                                  int index_max)
207{
208    struct legacy_audio_policy *lap = to_lap(pol);
209    lap->apm->initStreamVolume((AudioSystem::stream_type)stream, index_min,
210                               index_max);
211}
212
213static int ap_set_stream_volume_index(struct audio_policy *pol,
214                                      audio_stream_type_t stream,
215                                      int index)
216{
217    struct legacy_audio_policy *lap = to_lap(pol);
218    return lap->apm->setStreamVolumeIndex((AudioSystem::stream_type)stream,
219                                          index);
220}
221
222static int ap_get_stream_volume_index(const struct audio_policy *pol,
223                                      audio_stream_type_t stream,
224                                      int *index)
225{
226    const struct legacy_audio_policy *lap = to_clap(pol);
227    return lap->apm->getStreamVolumeIndex((AudioSystem::stream_type)stream,
228                                          index);
229}
230
231static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
232                                           audio_stream_type_t stream)
233{
234    const struct legacy_audio_policy *lap = to_clap(pol);
235    return lap->apm->getStrategyForStream((AudioSystem::stream_type)stream);
236}
237
238static uint32_t ap_get_devices_for_stream(const struct audio_policy *pol,
239                                       audio_stream_type_t stream)
240{
241    const struct legacy_audio_policy *lap = to_clap(pol);
242    return lap->apm->getDevicesForStream((AudioSystem::stream_type)stream);
243}
244
245static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
246                                            struct effect_descriptor_s *desc)
247{
248    struct legacy_audio_policy *lap = to_lap(pol);
249    return lap->apm->getOutputForEffect(desc);
250}
251
252static int ap_register_effect(struct audio_policy *pol,
253                              struct effect_descriptor_s *desc,
254                              audio_io_handle_t io,
255                              uint32_t strategy,
256                              int session,
257                              int id)
258{
259    struct legacy_audio_policy *lap = to_lap(pol);
260    return lap->apm->registerEffect(desc, io, strategy, session, id);
261}
262
263static int ap_unregister_effect(struct audio_policy *pol, int id)
264{
265    struct legacy_audio_policy *lap = to_lap(pol);
266    return lap->apm->unregisterEffect(id);
267}
268
269static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
270{
271    struct legacy_audio_policy *lap = to_lap(pol);
272    return lap->apm->setEffectEnabled(id, enabled);
273}
274
275static bool ap_is_stream_active(const struct audio_policy *pol, int stream,
276                                uint32_t in_past_ms)
277{
278    const struct legacy_audio_policy *lap = to_clap(pol);
279    return lap->apm->isStreamActive(stream, in_past_ms);
280}
281
282static int ap_dump(const struct audio_policy *pol, int fd)
283{
284    const struct legacy_audio_policy *lap = to_clap(pol);
285    return lap->apm->dump(fd);
286}
287
288static int create_legacy_ap(const struct audio_policy_device *device,
289                            struct audio_policy_service_ops *aps_ops,
290                            void *service,
291                            struct audio_policy **ap)
292{
293    struct legacy_audio_policy *lap;
294    int ret;
295
296    if (!service || !aps_ops)
297        return -EINVAL;
298
299    lap = (struct legacy_audio_policy *)calloc(1, sizeof(*lap));
300    if (!lap)
301        return -ENOMEM;
302
303    lap->policy.set_device_connection_state = ap_set_device_connection_state;
304    lap->policy.get_device_connection_state = ap_get_device_connection_state;
305    lap->policy.set_phone_state = ap_set_phone_state;
306    lap->policy.set_ringer_mode = ap_set_ringer_mode;
307    lap->policy.set_force_use = ap_set_force_use;
308    lap->policy.get_force_use = ap_get_force_use;
309    lap->policy.set_can_mute_enforced_audible =
310        ap_set_can_mute_enforced_audible;
311    lap->policy.init_check = ap_init_check;
312    lap->policy.get_output = ap_get_output;
313    lap->policy.start_output = ap_start_output;
314    lap->policy.stop_output = ap_stop_output;
315    lap->policy.release_output = ap_release_output;
316    lap->policy.get_input = ap_get_input;
317    lap->policy.start_input = ap_start_input;
318    lap->policy.stop_input = ap_stop_input;
319    lap->policy.release_input = ap_release_input;
320    lap->policy.init_stream_volume = ap_init_stream_volume;
321    lap->policy.set_stream_volume_index = ap_set_stream_volume_index;
322    lap->policy.get_stream_volume_index = ap_get_stream_volume_index;
323    lap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
324    lap->policy.get_devices_for_stream = ap_get_devices_for_stream;
325    lap->policy.get_output_for_effect = ap_get_output_for_effect;
326    lap->policy.register_effect = ap_register_effect;
327    lap->policy.unregister_effect = ap_unregister_effect;
328    lap->policy.set_effect_enabled = ap_set_effect_enabled;
329    lap->policy.is_stream_active = ap_is_stream_active;
330    lap->policy.dump = ap_dump;
331
332    lap->service = service;
333    lap->aps_ops = aps_ops;
334    lap->service_client =
335        new AudioPolicyCompatClient(aps_ops, service);
336    if (!lap->service_client) {
337        ret = -ENOMEM;
338        goto err_new_compat_client;
339    }
340
341    lap->apm = createAudioPolicyManager(lap->service_client);
342    if (!lap->apm) {
343        ret = -ENOMEM;
344        goto err_create_apm;
345    }
346
347    *ap = &lap->policy;
348    return 0;
349
350err_create_apm:
351    delete lap->service_client;
352err_new_compat_client:
353    free(lap);
354    *ap = NULL;
355    return ret;
356}
357
358static int destroy_legacy_ap(const struct audio_policy_device *ap_dev,
359                             struct audio_policy *ap)
360{
361    struct legacy_audio_policy *lap = to_lap(ap);
362
363    if (!lap)
364        return 0;
365
366    if (lap->apm)
367        destroyAudioPolicyManager(lap->apm);
368    if (lap->service_client)
369        delete lap->service_client;
370    free(lap);
371    return 0;
372}
373
374static int legacy_ap_dev_close(hw_device_t* device)
375{
376    if (device)
377        free(device);
378    return 0;
379}
380
381static int legacy_ap_dev_open(const hw_module_t* module, const char* name,
382                                    hw_device_t** device)
383{
384    struct legacy_ap_device *dev;
385
386    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
387        return -EINVAL;
388
389    dev = (struct legacy_ap_device *)calloc(1, sizeof(*dev));
390    if (!dev)
391        return -ENOMEM;
392
393    dev->device.common.tag = HARDWARE_DEVICE_TAG;
394    dev->device.common.version = 0;
395    dev->device.common.module = const_cast<hw_module_t*>(module);
396    dev->device.common.close = legacy_ap_dev_close;
397    dev->device.create_audio_policy = create_legacy_ap;
398    dev->device.destroy_audio_policy = destroy_legacy_ap;
399
400    *device = &dev->device.common;
401
402    return 0;
403}
404
405static struct hw_module_methods_t legacy_ap_module_methods = {
406        open: legacy_ap_dev_open
407};
408
409struct legacy_ap_module HAL_MODULE_INFO_SYM = {
410    module: {
411        common: {
412            tag: HARDWARE_MODULE_TAG,
413            version_major: 1,
414            version_minor: 0,
415            id: AUDIO_POLICY_HARDWARE_MODULE_ID,
416            name: "LEGACY Audio Policy HAL",
417            author: "The Android Open Source Project",
418            methods: &legacy_ap_module_methods,
419            dso : NULL,
420            reserved : {0},
421        },
422    },
423};
424
425}; // extern "C"
426
427}; // namespace android_audio_legacy
428