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    // deprecated, never called
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                                       audio_format_t format,
140                                       audio_channel_mask_t channelMask,
141                                       audio_output_flags_t flags)
142{
143    struct legacy_audio_policy *lap = to_lap(pol);
144
145    ALOGV("%s: tid %d", __func__, gettid());
146    return lap->apm->getOutput((AudioSystem::stream_type)stream,
147                               sampling_rate, (int) format, channelMask,
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, audio_source_t inputSource,
175                                      uint32_t sampling_rate,
176                                      audio_format_t format,
177                                      audio_channel_mask_t channelMask,
178                                      audio_in_acoustics_t acoustics)
179{
180    struct legacy_audio_policy *lap = to_lap(pol);
181    return lap->apm->getInput((int) inputSource, sampling_rate, (int) format, channelMask,
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                                          AUDIO_DEVICE_OUT_DEFAULT);
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                                          AUDIO_DEVICE_OUT_DEFAULT);
230}
231
232static int ap_set_stream_volume_index_for_device(struct audio_policy *pol,
233                                      audio_stream_type_t stream,
234                                      int index,
235                                      audio_devices_t device)
236{
237    struct legacy_audio_policy *lap = to_lap(pol);
238    return lap->apm->setStreamVolumeIndex((AudioSystem::stream_type)stream,
239                                          index,
240                                          device);
241}
242
243static int ap_get_stream_volume_index_for_device(const struct audio_policy *pol,
244                                      audio_stream_type_t stream,
245                                      int *index,
246                                      audio_devices_t device)
247{
248    const struct legacy_audio_policy *lap = to_clap(pol);
249    return lap->apm->getStreamVolumeIndex((AudioSystem::stream_type)stream,
250                                          index,
251                                          device);
252}
253
254static uint32_t ap_get_strategy_for_stream(const struct audio_policy *pol,
255                                           audio_stream_type_t stream)
256{
257    const struct legacy_audio_policy *lap = to_clap(pol);
258    return lap->apm->getStrategyForStream((AudioSystem::stream_type)stream);
259}
260
261static audio_devices_t ap_get_devices_for_stream(const struct audio_policy *pol,
262                                       audio_stream_type_t stream)
263{
264    const struct legacy_audio_policy *lap = to_clap(pol);
265    return lap->apm->getDevicesForStream((AudioSystem::stream_type)stream);
266}
267
268static audio_io_handle_t ap_get_output_for_effect(struct audio_policy *pol,
269                                            const struct effect_descriptor_s *desc)
270{
271    struct legacy_audio_policy *lap = to_lap(pol);
272    return lap->apm->getOutputForEffect(desc);
273}
274
275static int ap_register_effect(struct audio_policy *pol,
276                              const struct effect_descriptor_s *desc,
277                              audio_io_handle_t io,
278                              uint32_t strategy,
279                              int session,
280                              int id)
281{
282    struct legacy_audio_policy *lap = to_lap(pol);
283    return lap->apm->registerEffect(desc, io, strategy, session, id);
284}
285
286static int ap_unregister_effect(struct audio_policy *pol, int id)
287{
288    struct legacy_audio_policy *lap = to_lap(pol);
289    return lap->apm->unregisterEffect(id);
290}
291
292static int ap_set_effect_enabled(struct audio_policy *pol, int id, bool enabled)
293{
294    struct legacy_audio_policy *lap = to_lap(pol);
295    return lap->apm->setEffectEnabled(id, enabled);
296}
297
298static bool ap_is_stream_active(const struct audio_policy *pol, audio_stream_type_t stream,
299                                uint32_t in_past_ms)
300{
301    const struct legacy_audio_policy *lap = to_clap(pol);
302    return lap->apm->isStreamActive((int) stream, in_past_ms);
303}
304
305static bool ap_is_source_active(const struct audio_policy *pol, audio_source_t source)
306{
307    const struct legacy_audio_policy *lap = to_clap(pol);
308    return lap->apm->isSourceActive(source);
309}
310
311static int ap_dump(const struct audio_policy *pol, int fd)
312{
313    const struct legacy_audio_policy *lap = to_clap(pol);
314    return lap->apm->dump(fd);
315}
316
317static int create_legacy_ap(const struct audio_policy_device *device,
318                            struct audio_policy_service_ops *aps_ops,
319                            void *service,
320                            struct audio_policy **ap)
321{
322    struct legacy_audio_policy *lap;
323    int ret;
324
325    if (!service || !aps_ops)
326        return -EINVAL;
327
328    lap = (struct legacy_audio_policy *)calloc(1, sizeof(*lap));
329    if (!lap)
330        return -ENOMEM;
331
332    lap->policy.set_device_connection_state = ap_set_device_connection_state;
333    lap->policy.get_device_connection_state = ap_get_device_connection_state;
334    lap->policy.set_phone_state = ap_set_phone_state;
335    lap->policy.set_ringer_mode = ap_set_ringer_mode;
336    lap->policy.set_force_use = ap_set_force_use;
337    lap->policy.get_force_use = ap_get_force_use;
338    lap->policy.set_can_mute_enforced_audible =
339        ap_set_can_mute_enforced_audible;
340    lap->policy.init_check = ap_init_check;
341    lap->policy.get_output = ap_get_output;
342    lap->policy.start_output = ap_start_output;
343    lap->policy.stop_output = ap_stop_output;
344    lap->policy.release_output = ap_release_output;
345    lap->policy.get_input = ap_get_input;
346    lap->policy.start_input = ap_start_input;
347    lap->policy.stop_input = ap_stop_input;
348    lap->policy.release_input = ap_release_input;
349    lap->policy.init_stream_volume = ap_init_stream_volume;
350    lap->policy.set_stream_volume_index = ap_set_stream_volume_index;
351    lap->policy.get_stream_volume_index = ap_get_stream_volume_index;
352    lap->policy.set_stream_volume_index_for_device = ap_set_stream_volume_index_for_device;
353    lap->policy.get_stream_volume_index_for_device = ap_get_stream_volume_index_for_device;
354    lap->policy.get_strategy_for_stream = ap_get_strategy_for_stream;
355    lap->policy.get_devices_for_stream = ap_get_devices_for_stream;
356    lap->policy.get_output_for_effect = ap_get_output_for_effect;
357    lap->policy.register_effect = ap_register_effect;
358    lap->policy.unregister_effect = ap_unregister_effect;
359    lap->policy.set_effect_enabled = ap_set_effect_enabled;
360    lap->policy.is_stream_active = ap_is_stream_active;
361    lap->policy.is_source_active = ap_is_source_active;
362    lap->policy.dump = ap_dump;
363
364    lap->service = service;
365    lap->aps_ops = aps_ops;
366    lap->service_client =
367        new AudioPolicyCompatClient(aps_ops, service);
368    if (!lap->service_client) {
369        ret = -ENOMEM;
370        goto err_new_compat_client;
371    }
372
373    lap->apm = createAudioPolicyManager(lap->service_client);
374    if (!lap->apm) {
375        ret = -ENOMEM;
376        goto err_create_apm;
377    }
378
379    *ap = &lap->policy;
380    return 0;
381
382err_create_apm:
383    delete lap->service_client;
384err_new_compat_client:
385    free(lap);
386    *ap = NULL;
387    return ret;
388}
389
390static int destroy_legacy_ap(const struct audio_policy_device *ap_dev,
391                             struct audio_policy *ap)
392{
393    struct legacy_audio_policy *lap = to_lap(ap);
394
395    if (!lap)
396        return 0;
397
398    if (lap->apm)
399        destroyAudioPolicyManager(lap->apm);
400    if (lap->service_client)
401        delete lap->service_client;
402    free(lap);
403    return 0;
404}
405
406static int legacy_ap_dev_close(hw_device_t* device)
407{
408    if (device)
409        free(device);
410    return 0;
411}
412
413static int legacy_ap_dev_open(const hw_module_t* module, const char* name,
414                                    hw_device_t** device)
415{
416    struct legacy_ap_device *dev;
417
418    if (strcmp(name, AUDIO_POLICY_INTERFACE) != 0)
419        return -EINVAL;
420
421    dev = (struct legacy_ap_device *)calloc(1, sizeof(*dev));
422    if (!dev)
423        return -ENOMEM;
424
425    dev->device.common.tag = HARDWARE_DEVICE_TAG;
426    dev->device.common.version = 0;
427    dev->device.common.module = const_cast<hw_module_t*>(module);
428    dev->device.common.close = legacy_ap_dev_close;
429    dev->device.create_audio_policy = create_legacy_ap;
430    dev->device.destroy_audio_policy = destroy_legacy_ap;
431
432    *device = &dev->device.common;
433
434    return 0;
435}
436
437static struct hw_module_methods_t legacy_ap_module_methods = {
438        open: legacy_ap_dev_open
439};
440
441struct legacy_ap_module HAL_MODULE_INFO_SYM = {
442    module: {
443        common: {
444            tag: HARDWARE_MODULE_TAG,
445            version_major: 1,
446            version_minor: 0,
447            id: AUDIO_POLICY_HARDWARE_MODULE_ID,
448            name: "LEGACY Audio Policy HAL",
449            author: "The Android Open Source Project",
450            methods: &legacy_ap_module_methods,
451            dso : NULL,
452            reserved : {0},
453        },
454    },
455};
456
457}; // extern "C"
458
459}; // namespace android_audio_legacy
460