AudioPolicyManager.cpp revision 4dc680607181e6a76f4e91a39366c4f5dfb7b03e 
1/*
2 * Copyright (C) 2009 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 "AudioPolicyManager"
18//#define LOG_NDEBUG 0
19
20//#define VERY_VERBOSE_LOGGING
21#ifdef VERY_VERBOSE_LOGGING
22#define ALOGVV ALOGV
23#else
24#define ALOGVV(a...) do { } while(0)
25#endif
26
27// A device mask for all audio input devices that are considered "virtual" when evaluating
28// active inputs in getActiveInput()
29#define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  AUDIO_DEVICE_IN_REMOTE_SUBMIX
30// A device mask for all audio output devices that are considered "remote" when evaluating
31// active output devices in isStreamActiveRemotely()
32#define APM_AUDIO_OUT_DEVICE_REMOTE_ALL  AUDIO_DEVICE_OUT_REMOTE_SUBMIX
33// A device mask for all audio input and output devices where matching inputs/outputs on device
34// type alone is not enough: the address must match too
35#define APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX | \
36                                            AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
37
38#include <inttypes.h>
39#include <math.h>
40
41#include <cutils/properties.h>
42#include <utils/Log.h>
43#include <hardware/audio.h>
44#include <hardware/audio_effect.h>
45#include <media/AudioParameter.h>
46#include "AudioPolicyManager.h"
47#include "audio_policy_conf.h"
48
49namespace android {
50
51// ----------------------------------------------------------------------------
52// Definitions for audio_policy.conf file parsing
53// ----------------------------------------------------------------------------
54
55struct StringToEnum {
56    const char *name;
57    uint32_t value;
58};
59
60#define STRING_TO_ENUM(string) { #string, string }
61#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
62
63const StringToEnum sDeviceNameToEnumTable[] = {
64    STRING_TO_ENUM(AUDIO_DEVICE_OUT_EARPIECE),
65    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPEAKER),
66    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADSET),
67    STRING_TO_ENUM(AUDIO_DEVICE_OUT_WIRED_HEADPHONE),
68    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO),
69    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET),
70    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT),
71    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_SCO),
72    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP),
73    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES),
74    STRING_TO_ENUM(AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER),
75    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_A2DP),
76    STRING_TO_ENUM(AUDIO_DEVICE_OUT_AUX_DIGITAL),
77    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI),
78    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET),
79    STRING_TO_ENUM(AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET),
80    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_ACCESSORY),
81    STRING_TO_ENUM(AUDIO_DEVICE_OUT_USB_DEVICE),
82    STRING_TO_ENUM(AUDIO_DEVICE_OUT_ALL_USB),
83    STRING_TO_ENUM(AUDIO_DEVICE_OUT_REMOTE_SUBMIX),
84    STRING_TO_ENUM(AUDIO_DEVICE_OUT_TELEPHONY_TX),
85    STRING_TO_ENUM(AUDIO_DEVICE_OUT_LINE),
86    STRING_TO_ENUM(AUDIO_DEVICE_OUT_HDMI_ARC),
87    STRING_TO_ENUM(AUDIO_DEVICE_OUT_SPDIF),
88    STRING_TO_ENUM(AUDIO_DEVICE_OUT_FM),
89    STRING_TO_ENUM(AUDIO_DEVICE_IN_BUILTIN_MIC),
90    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET),
91    STRING_TO_ENUM(AUDIO_DEVICE_IN_ALL_SCO),
92    STRING_TO_ENUM(AUDIO_DEVICE_IN_WIRED_HEADSET),
93    STRING_TO_ENUM(AUDIO_DEVICE_IN_AUX_DIGITAL),
94    STRING_TO_ENUM(AUDIO_DEVICE_IN_HDMI),
95    STRING_TO_ENUM(AUDIO_DEVICE_IN_VOICE_CALL),
96    STRING_TO_ENUM(AUDIO_DEVICE_IN_TELEPHONY_RX),
97    STRING_TO_ENUM(AUDIO_DEVICE_IN_BACK_MIC),
98    STRING_TO_ENUM(AUDIO_DEVICE_IN_REMOTE_SUBMIX),
99    STRING_TO_ENUM(AUDIO_DEVICE_IN_ANLG_DOCK_HEADSET),
100    STRING_TO_ENUM(AUDIO_DEVICE_IN_DGTL_DOCK_HEADSET),
101    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_ACCESSORY),
102    STRING_TO_ENUM(AUDIO_DEVICE_IN_USB_DEVICE),
103    STRING_TO_ENUM(AUDIO_DEVICE_IN_FM_TUNER),
104    STRING_TO_ENUM(AUDIO_DEVICE_IN_TV_TUNER),
105    STRING_TO_ENUM(AUDIO_DEVICE_IN_LINE),
106    STRING_TO_ENUM(AUDIO_DEVICE_IN_SPDIF),
107    STRING_TO_ENUM(AUDIO_DEVICE_IN_BLUETOOTH_A2DP),
108    STRING_TO_ENUM(AUDIO_DEVICE_IN_LOOPBACK),
109};
110
111const StringToEnum sFlagNameToEnumTable[] = {
112    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DIRECT),
113    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PRIMARY),
114    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_FAST),
115    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_DEEP_BUFFER),
116    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD),
117    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NON_BLOCKING),
118};
119
120const StringToEnum sFormatNameToEnumTable[] = {
121    STRING_TO_ENUM(AUDIO_FORMAT_PCM_16_BIT),
122    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_BIT),
123    STRING_TO_ENUM(AUDIO_FORMAT_PCM_32_BIT),
124    STRING_TO_ENUM(AUDIO_FORMAT_PCM_8_24_BIT),
125    STRING_TO_ENUM(AUDIO_FORMAT_PCM_FLOAT),
126    STRING_TO_ENUM(AUDIO_FORMAT_PCM_24_BIT_PACKED),
127    STRING_TO_ENUM(AUDIO_FORMAT_MP3),
128    STRING_TO_ENUM(AUDIO_FORMAT_AAC),
129    STRING_TO_ENUM(AUDIO_FORMAT_AAC_MAIN),
130    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LC),
131    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SSR),
132    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LTP),
133    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V1),
134    STRING_TO_ENUM(AUDIO_FORMAT_AAC_SCALABLE),
135    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ERLC),
136    STRING_TO_ENUM(AUDIO_FORMAT_AAC_LD),
137    STRING_TO_ENUM(AUDIO_FORMAT_AAC_HE_V2),
138    STRING_TO_ENUM(AUDIO_FORMAT_AAC_ELD),
139    STRING_TO_ENUM(AUDIO_FORMAT_VORBIS),
140    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V1),
141    STRING_TO_ENUM(AUDIO_FORMAT_HE_AAC_V2),
142    STRING_TO_ENUM(AUDIO_FORMAT_OPUS),
143    STRING_TO_ENUM(AUDIO_FORMAT_AC3),
144    STRING_TO_ENUM(AUDIO_FORMAT_E_AC3),
145};
146
147const StringToEnum sOutChannelsNameToEnumTable[] = {
148    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_MONO),
149    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_STEREO),
150    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_5POINT1),
151    STRING_TO_ENUM(AUDIO_CHANNEL_OUT_7POINT1),
152};
153
154const StringToEnum sInChannelsNameToEnumTable[] = {
155    STRING_TO_ENUM(AUDIO_CHANNEL_IN_MONO),
156    STRING_TO_ENUM(AUDIO_CHANNEL_IN_STEREO),
157    STRING_TO_ENUM(AUDIO_CHANNEL_IN_FRONT_BACK),
158};
159
160const StringToEnum sGainModeNameToEnumTable[] = {
161    STRING_TO_ENUM(AUDIO_GAIN_MODE_JOINT),
162    STRING_TO_ENUM(AUDIO_GAIN_MODE_CHANNELS),
163    STRING_TO_ENUM(AUDIO_GAIN_MODE_RAMP),
164};
165
166
167uint32_t AudioPolicyManager::stringToEnum(const struct StringToEnum *table,
168                                              size_t size,
169                                              const char *name)
170{
171    for (size_t i = 0; i < size; i++) {
172        if (strcmp(table[i].name, name) == 0) {
173            ALOGV("stringToEnum() found %s", table[i].name);
174            return table[i].value;
175        }
176    }
177    return 0;
178}
179
180const char *AudioPolicyManager::enumToString(const struct StringToEnum *table,
181                                              size_t size,
182                                              uint32_t value)
183{
184    for (size_t i = 0; i < size; i++) {
185        if (table[i].value == value) {
186            return table[i].name;
187        }
188    }
189    return "";
190}
191
192bool AudioPolicyManager::stringToBool(const char *value)
193{
194    return ((strcasecmp("true", value) == 0) || (strcmp("1", value) == 0));
195}
196
197
198// ----------------------------------------------------------------------------
199// AudioPolicyInterface implementation
200// ----------------------------------------------------------------------------
201
202
203status_t AudioPolicyManager::setDeviceConnectionState(audio_devices_t device,
204                                                          audio_policy_dev_state_t state,
205                                                  const char *device_address)
206{
207    String8 address = String8(device_address);
208
209    ALOGV("setDeviceConnectionState() device: %x, state %d, address %s", device, state, device_address);
210
211    // connect/disconnect only 1 device at a time
212    if (!audio_is_output_device(device) && !audio_is_input_device(device)) return BAD_VALUE;
213
214    // handle output devices
215    if (audio_is_output_device(device)) {
216        SortedVector <audio_io_handle_t> outputs;
217
218        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
219        devDesc->mAddress = address;
220        ssize_t index = mAvailableOutputDevices.indexOf(devDesc);
221
222        // save a copy of the opened output descriptors before any output is opened or closed
223        // by checkOutputsForDevice(). This will be needed by checkOutputForAllStrategies()
224        mPreviousOutputs = mOutputs;
225        switch (state)
226        {
227        // handle output device connection
228        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE:
229            if (index >= 0) {
230                ALOGW("setDeviceConnectionState() device already connected: %x", device);
231                return INVALID_OPERATION;
232            }
233            ALOGV("setDeviceConnectionState() connecting device %x", device);
234
235            // register new device as available
236            index = mAvailableOutputDevices.add(devDesc);
237            if (index >= 0) {
238                mAvailableOutputDevices[index]->mId = nextUniqueId();
239                sp<HwModule> module = getModuleForDevice(device);
240                ALOG_ASSERT(module != NULL, "setDeviceConnectionState():"
241                        "could not find HW module for device %08x", device);
242                mAvailableOutputDevices[index]->mModule = module;
243            } else {
244                return NO_MEMORY;
245            }
246
247            if (checkOutputsForDevice(device, state, outputs, address) != NO_ERROR) {
248                mAvailableOutputDevices.remove(devDesc);
249                return INVALID_OPERATION;
250            }
251            // outputs should never be empty here
252            ALOG_ASSERT(outputs.size() != 0, "setDeviceConnectionState():"
253                    "checkOutputsForDevice() returned no outputs but status OK");
254            ALOGV("setDeviceConnectionState() checkOutputsForDevice() returned %zu outputs",
255                  outputs.size());
256            break;
257        // handle output device disconnection
258        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
259            if (index < 0) {
260                ALOGW("setDeviceConnectionState() device not connected: %x", device);
261                return INVALID_OPERATION;
262            }
263
264            ALOGV("setDeviceConnectionState() disconnecting device %x", device);
265            // remove device from available output devices
266            mAvailableOutputDevices.remove(devDesc);
267
268            checkOutputsForDevice(device, state, outputs, address);
269            } break;
270
271        default:
272            ALOGE("setDeviceConnectionState() invalid state: %x", state);
273            return BAD_VALUE;
274        }
275
276        // checkA2dpSuspend must run before checkOutputForAllStrategies so that A2DP
277        // output is suspended before any tracks are moved to it
278        checkA2dpSuspend();
279        checkOutputForAllStrategies();
280        // outputs must be closed after checkOutputForAllStrategies() is executed
281        if (!outputs.isEmpty()) {
282            for (size_t i = 0; i < outputs.size(); i++) {
283                sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
284                // close unused outputs after device disconnection or direct outputs that have been
285                // opened by checkOutputsForDevice() to query dynamic parameters
286                if ((state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE) ||
287                        (((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0) &&
288                         (desc->mDirectOpenCount == 0))) {
289                    closeOutput(outputs[i]);
290                }
291            }
292            // check again after closing A2DP output to reset mA2dpSuspended if needed
293            checkA2dpSuspend();
294        }
295
296        updateDevicesAndOutputs();
297        for (size_t i = 0; i < mOutputs.size(); i++) {
298            // do not force device change on duplicated output because if device is 0, it will
299            // also force a device 0 for the two outputs it is duplicated to which may override
300            // a valid device selection on those outputs.
301            bool force = !mOutputs.valueAt(i)->isDuplicated()
302                    && (!deviceDistinguishesOnAddress(device)
303                            // always force when disconnecting (a non-duplicated device)
304                            || (state == AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE));
305            setOutputDevice(mOutputs.keyAt(i),
306                            getNewOutputDevice(mOutputs.keyAt(i), true /*fromCache*/),
307                            force, 0);
308        }
309
310        mpClientInterface->onAudioPortListUpdate();
311        return NO_ERROR;
312    }  // end if is output device
313
314    // handle input devices
315    if (audio_is_input_device(device)) {
316        SortedVector <audio_io_handle_t> inputs;
317
318        sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
319        devDesc->mAddress = address;
320        ssize_t index = mAvailableInputDevices.indexOf(devDesc);
321        switch (state)
322        {
323        // handle input device connection
324        case AUDIO_POLICY_DEVICE_STATE_AVAILABLE: {
325            if (index >= 0) {
326                ALOGW("setDeviceConnectionState() device already connected: %d", device);
327                return INVALID_OPERATION;
328            }
329            sp<HwModule> module = getModuleForDevice(device);
330            if (module == NULL) {
331                ALOGW("setDeviceConnectionState(): could not find HW module for device %08x",
332                      device);
333                return INVALID_OPERATION;
334            }
335            if (checkInputsForDevice(device, state, inputs, address) != NO_ERROR) {
336                return INVALID_OPERATION;
337            }
338
339            index = mAvailableInputDevices.add(devDesc);
340            if (index >= 0) {
341                mAvailableInputDevices[index]->mId = nextUniqueId();
342                mAvailableInputDevices[index]->mModule = module;
343            } else {
344                return NO_MEMORY;
345            }
346        } break;
347
348        // handle input device disconnection
349        case AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE: {
350            if (index < 0) {
351                ALOGW("setDeviceConnectionState() device not connected: %d", device);
352                return INVALID_OPERATION;
353            }
354            checkInputsForDevice(device, state, inputs, address);
355            mAvailableInputDevices.remove(devDesc);
356        } break;
357
358        default:
359            ALOGE("setDeviceConnectionState() invalid state: %x", state);
360            return BAD_VALUE;
361        }
362
363        closeAllInputs();
364
365        mpClientInterface->onAudioPortListUpdate();
366        return NO_ERROR;
367    } // end if is input device
368
369    ALOGW("setDeviceConnectionState() invalid device: %x", device);
370    return BAD_VALUE;
371}
372
373audio_policy_dev_state_t AudioPolicyManager::getDeviceConnectionState(audio_devices_t device,
374                                                  const char *device_address)
375{
376    audio_policy_dev_state_t state = AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
377    String8 address = String8(device_address);
378    sp<DeviceDescriptor> devDesc = new DeviceDescriptor(String8(""), device);
379    devDesc->mAddress = String8(device_address);
380    ssize_t index;
381    DeviceVector *deviceVector;
382
383    if (audio_is_output_device(device)) {
384        deviceVector = &mAvailableOutputDevices;
385    } else if (audio_is_input_device(device)) {
386        deviceVector = &mAvailableInputDevices;
387    } else {
388        ALOGW("getDeviceConnectionState() invalid device type %08x", device);
389        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
390    }
391
392    index = deviceVector->indexOf(devDesc);
393    if (index >= 0) {
394        return AUDIO_POLICY_DEVICE_STATE_AVAILABLE;
395    } else {
396        return AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE;
397    }
398}
399
400void AudioPolicyManager::setPhoneState(audio_mode_t state)
401{
402    ALOGV("setPhoneState() state %d", state);
403    audio_devices_t newDevice = AUDIO_DEVICE_NONE;
404    if (state < 0 || state >= AUDIO_MODE_CNT) {
405        ALOGW("setPhoneState() invalid state %d", state);
406        return;
407    }
408
409    if (state == mPhoneState ) {
410        ALOGW("setPhoneState() setting same state %d", state);
411        return;
412    }
413
414    // if leaving call state, handle special case of active streams
415    // pertaining to sonification strategy see handleIncallSonification()
416    if (isInCall()) {
417        ALOGV("setPhoneState() in call state management: new state is %d", state);
418        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
419            handleIncallSonification((audio_stream_type_t)stream, false, true);
420        }
421    }
422
423    // store previous phone state for management of sonification strategy below
424    int oldState = mPhoneState;
425    mPhoneState = state;
426    bool force = false;
427
428    // are we entering or starting a call
429    if (!isStateInCall(oldState) && isStateInCall(state)) {
430        ALOGV("  Entering call in setPhoneState()");
431        // force routing command to audio hardware when starting a call
432        // even if no device change is needed
433        force = true;
434        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
435            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
436                    sVolumeProfiles[AUDIO_STREAM_VOICE_CALL][j];
437        }
438    } else if (isStateInCall(oldState) && !isStateInCall(state)) {
439        ALOGV("  Exiting call in setPhoneState()");
440        // force routing command to audio hardware when exiting a call
441        // even if no device change is needed
442        force = true;
443        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
444            mStreams[AUDIO_STREAM_DTMF].mVolumeCurve[j] =
445                    sVolumeProfiles[AUDIO_STREAM_DTMF][j];
446        }
447    } else if (isStateInCall(state) && (state != oldState)) {
448        ALOGV("  Switching between telephony and VoIP in setPhoneState()");
449        // force routing command to audio hardware when switching between telephony and VoIP
450        // even if no device change is needed
451        force = true;
452    }
453
454    // check for device and output changes triggered by new phone state
455    newDevice = getNewOutputDevice(mPrimaryOutput, false /*fromCache*/);
456    checkA2dpSuspend();
457    checkOutputForAllStrategies();
458    updateDevicesAndOutputs();
459
460    sp<AudioOutputDescriptor> hwOutputDesc = mOutputs.valueFor(mPrimaryOutput);
461
462    // force routing command to audio hardware when ending call
463    // even if no device change is needed
464    if (isStateInCall(oldState) && newDevice == AUDIO_DEVICE_NONE) {
465        newDevice = hwOutputDesc->device();
466    }
467
468    int delayMs = 0;
469    if (isStateInCall(state)) {
470        nsecs_t sysTime = systemTime();
471        for (size_t i = 0; i < mOutputs.size(); i++) {
472            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
473            // mute media and sonification strategies and delay device switch by the largest
474            // latency of any output where either strategy is active.
475            // This avoid sending the ring tone or music tail into the earpiece or headset.
476            if ((desc->isStrategyActive(STRATEGY_MEDIA,
477                                     SONIFICATION_HEADSET_MUSIC_DELAY,
478                                     sysTime) ||
479                    desc->isStrategyActive(STRATEGY_SONIFICATION,
480                                         SONIFICATION_HEADSET_MUSIC_DELAY,
481                                         sysTime)) &&
482                    (delayMs < (int)desc->mLatency*2)) {
483                delayMs = desc->mLatency*2;
484            }
485            setStrategyMute(STRATEGY_MEDIA, true, mOutputs.keyAt(i));
486            setStrategyMute(STRATEGY_MEDIA, false, mOutputs.keyAt(i), MUTE_TIME_MS,
487                getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/));
488            setStrategyMute(STRATEGY_SONIFICATION, true, mOutputs.keyAt(i));
489            setStrategyMute(STRATEGY_SONIFICATION, false, mOutputs.keyAt(i), MUTE_TIME_MS,
490                getDeviceForStrategy(STRATEGY_SONIFICATION, true /*fromCache*/));
491        }
492    }
493
494    // change routing is necessary
495    setOutputDevice(mPrimaryOutput, newDevice, force, delayMs);
496
497    // if entering in call state, handle special case of active streams
498    // pertaining to sonification strategy see handleIncallSonification()
499    if (isStateInCall(state)) {
500        ALOGV("setPhoneState() in call state management: new state is %d", state);
501        for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
502            handleIncallSonification((audio_stream_type_t)stream, true, true);
503        }
504    }
505
506    // Flag that ringtone volume must be limited to music volume until we exit MODE_RINGTONE
507    if (state == AUDIO_MODE_RINGTONE &&
508        isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY)) {
509        mLimitRingtoneVolume = true;
510    } else {
511        mLimitRingtoneVolume = false;
512    }
513}
514
515void AudioPolicyManager::setForceUse(audio_policy_force_use_t usage,
516                                         audio_policy_forced_cfg_t config)
517{
518    ALOGV("setForceUse() usage %d, config %d, mPhoneState %d", usage, config, mPhoneState);
519
520    bool forceVolumeReeval = false;
521    switch(usage) {
522    case AUDIO_POLICY_FORCE_FOR_COMMUNICATION:
523        if (config != AUDIO_POLICY_FORCE_SPEAKER && config != AUDIO_POLICY_FORCE_BT_SCO &&
524            config != AUDIO_POLICY_FORCE_NONE) {
525            ALOGW("setForceUse() invalid config %d for FOR_COMMUNICATION", config);
526            return;
527        }
528        forceVolumeReeval = true;
529        mForceUse[usage] = config;
530        break;
531    case AUDIO_POLICY_FORCE_FOR_MEDIA:
532        if (config != AUDIO_POLICY_FORCE_HEADPHONES && config != AUDIO_POLICY_FORCE_BT_A2DP &&
533            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
534            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
535            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK && config != AUDIO_POLICY_FORCE_NONE &&
536            config != AUDIO_POLICY_FORCE_NO_BT_A2DP) {
537            ALOGW("setForceUse() invalid config %d for FOR_MEDIA", config);
538            return;
539        }
540        mForceUse[usage] = config;
541        break;
542    case AUDIO_POLICY_FORCE_FOR_RECORD:
543        if (config != AUDIO_POLICY_FORCE_BT_SCO && config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
544            config != AUDIO_POLICY_FORCE_NONE) {
545            ALOGW("setForceUse() invalid config %d for FOR_RECORD", config);
546            return;
547        }
548        mForceUse[usage] = config;
549        break;
550    case AUDIO_POLICY_FORCE_FOR_DOCK:
551        if (config != AUDIO_POLICY_FORCE_NONE && config != AUDIO_POLICY_FORCE_BT_CAR_DOCK &&
552            config != AUDIO_POLICY_FORCE_BT_DESK_DOCK &&
553            config != AUDIO_POLICY_FORCE_WIRED_ACCESSORY &&
554            config != AUDIO_POLICY_FORCE_ANALOG_DOCK &&
555            config != AUDIO_POLICY_FORCE_DIGITAL_DOCK) {
556            ALOGW("setForceUse() invalid config %d for FOR_DOCK", config);
557        }
558        forceVolumeReeval = true;
559        mForceUse[usage] = config;
560        break;
561    case AUDIO_POLICY_FORCE_FOR_SYSTEM:
562        if (config != AUDIO_POLICY_FORCE_NONE &&
563            config != AUDIO_POLICY_FORCE_SYSTEM_ENFORCED) {
564            ALOGW("setForceUse() invalid config %d for FOR_SYSTEM", config);
565        }
566        forceVolumeReeval = true;
567        mForceUse[usage] = config;
568        break;
569    case AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO:
570        if (config != AUDIO_POLICY_FORCE_NONE &&
571            config != AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED) {
572            ALOGW("setForceUse() invalid config %d forHDMI_SYSTEM_AUDIO", config);
573        }
574        mForceUse[usage] = config;
575        break;
576    default:
577        ALOGW("setForceUse() invalid usage %d", usage);
578        break;
579    }
580
581    // check for device and output changes triggered by new force usage
582    checkA2dpSuspend();
583    checkOutputForAllStrategies();
584    updateDevicesAndOutputs();
585    for (size_t i = 0; i < mOutputs.size(); i++) {
586        audio_io_handle_t output = mOutputs.keyAt(i);
587        audio_devices_t newDevice = getNewOutputDevice(output, true /*fromCache*/);
588        setOutputDevice(output, newDevice, (newDevice != AUDIO_DEVICE_NONE));
589        if (forceVolumeReeval && (newDevice != AUDIO_DEVICE_NONE)) {
590            applyStreamVolumes(output, newDevice, 0, true);
591        }
592    }
593
594    audio_io_handle_t activeInput = getActiveInput();
595    if (activeInput != 0) {
596        setInputDevice(activeInput, getNewInputDevice(activeInput));
597    }
598
599}
600
601audio_policy_forced_cfg_t AudioPolicyManager::getForceUse(audio_policy_force_use_t usage)
602{
603    return mForceUse[usage];
604}
605
606void AudioPolicyManager::setSystemProperty(const char* property, const char* value)
607{
608    ALOGV("setSystemProperty() property %s, value %s", property, value);
609}
610
611// Find a direct output profile compatible with the parameters passed, even if the input flags do
612// not explicitly request a direct output
613sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getProfileForDirectOutput(
614                                                               audio_devices_t device,
615                                                               uint32_t samplingRate,
616                                                               audio_format_t format,
617                                                               audio_channel_mask_t channelMask,
618                                                               audio_output_flags_t flags)
619{
620    for (size_t i = 0; i < mHwModules.size(); i++) {
621        if (mHwModules[i]->mHandle == 0) {
622            continue;
623        }
624        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++) {
625            sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
626            bool found = profile->isCompatibleProfile(device, samplingRate,
627                    NULL /*updatedSamplingRate*/, format, channelMask,
628                    flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD ?
629                        AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD : AUDIO_OUTPUT_FLAG_DIRECT);
630            if (found && (mAvailableOutputDevices.types() & profile->mSupportedDevices.types())) {
631                return profile;
632            }
633        }
634    }
635    return 0;
636}
637
638audio_io_handle_t AudioPolicyManager::getOutput(audio_stream_type_t stream,
639                                    uint32_t samplingRate,
640                                    audio_format_t format,
641                                    audio_channel_mask_t channelMask,
642                                    audio_output_flags_t flags,
643                                    const audio_offload_info_t *offloadInfo)
644{
645
646    routing_strategy strategy = getStrategy(stream);
647    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
648    ALOGV("getOutput() device %d, stream %d, samplingRate %d, format %x, channelMask %x, flags %x",
649          device, stream, samplingRate, format, channelMask, flags);
650
651    return getOutputForDevice(device, stream, samplingRate,format, channelMask, flags,
652            offloadInfo);
653}
654
655audio_io_handle_t AudioPolicyManager::getOutputForAttr(const audio_attributes_t *attr,
656                                    uint32_t samplingRate,
657                                    audio_format_t format,
658                                    audio_channel_mask_t channelMask,
659                                    audio_output_flags_t flags,
660                                    const audio_offload_info_t *offloadInfo)
661{
662    if (attr == NULL) {
663        ALOGE("getOutputForAttr() called with NULL audio attributes");
664        return 0;
665    }
666    ALOGV("getOutputForAttr() usage=%d, content=%d, tag=%s",
667            attr->usage, attr->content_type, attr->tags);
668
669    // TODO this is where filtering for custom policies (rerouting, dynamic sources) will go
670    routing_strategy strategy = (routing_strategy) getStrategyForAttr(attr);
671    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
672    ALOGV("getOutputForAttr() device %d, samplingRate %d, format %x, channelMask %x, flags %x",
673          device, samplingRate, format, channelMask, flags);
674
675    audio_stream_type_t stream = streamTypefromAttributesInt(attr);
676    return getOutputForDevice(device, stream, samplingRate, format, channelMask, flags,
677                offloadInfo);
678}
679
680audio_io_handle_t AudioPolicyManager::getOutputForDevice(
681        audio_devices_t device,
682        audio_stream_type_t stream,
683        uint32_t samplingRate,
684        audio_format_t format,
685        audio_channel_mask_t channelMask,
686        audio_output_flags_t flags,
687        const audio_offload_info_t *offloadInfo)
688{
689    audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
690    uint32_t latency = 0;
691    status_t status;
692
693#ifdef AUDIO_POLICY_TEST
694    if (mCurOutput != 0) {
695        ALOGV("getOutput() test output mCurOutput %d, samplingRate %d, format %d, channelMask %x, mDirectOutput %d",
696                mCurOutput, mTestSamplingRate, mTestFormat, mTestChannels, mDirectOutput);
697
698        if (mTestOutputs[mCurOutput] == 0) {
699            ALOGV("getOutput() opening test output");
700            sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
701            outputDesc->mDevice = mTestDevice;
702            outputDesc->mLatency = mTestLatencyMs;
703            outputDesc->mFlags =
704                    (audio_output_flags_t)(mDirectOutput ? AUDIO_OUTPUT_FLAG_DIRECT : 0);
705            outputDesc->mRefCount[stream] = 0;
706            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
707            config.sample_rate = mTestSamplingRate;
708            config.channel_mask = mTestChannels;
709            config.format = mTestFormat;
710            config.offload_info = *offloadInfo;
711            status = mpClientInterface->openOutput(0,
712                                                  &mTestOutputs[mCurOutput],
713                                                  &config,
714                                                  &outputDesc->mDevice,
715                                                  String8(""),
716                                                  &outputDesc->mLatency,
717                                                  outputDesc->mFlags);
718            if (status == NO_ERROR) {
719                outputDesc->mSamplingRate = config.sample_rate;
720                outputDesc->mFormat = config.format;
721                outputDesc->mChannelMask = config.channel_mask;
722                AudioParameter outputCmd = AudioParameter();
723                outputCmd.addInt(String8("set_id"),mCurOutput);
724                mpClientInterface->setParameters(mTestOutputs[mCurOutput],outputCmd.toString());
725                addOutput(mTestOutputs[mCurOutput], outputDesc);
726            }
727        }
728        return mTestOutputs[mCurOutput];
729    }
730#endif //AUDIO_POLICY_TEST
731
732    // open a direct output if required by specified parameters
733    //force direct flag if offload flag is set: offloading implies a direct output stream
734    // and all common behaviors are driven by checking only the direct flag
735    // this should normally be set appropriately in the policy configuration file
736    if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
737        flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
738    }
739
740    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
741    // creating an offloaded track and tearing it down immediately after start when audioflinger
742    // detects there is an active non offloadable effect.
743    // FIXME: We should check the audio session here but we do not have it in this context.
744    // This may prevent offloading in rare situations where effects are left active by apps
745    // in the background.
746    sp<IOProfile> profile;
747    if (((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) == 0) ||
748            !isNonOffloadableEffectEnabled()) {
749        profile = getProfileForDirectOutput(device,
750                                           samplingRate,
751                                           format,
752                                           channelMask,
753                                           (audio_output_flags_t)flags);
754    }
755
756    if (profile != 0) {
757        sp<AudioOutputDescriptor> outputDesc = NULL;
758
759        for (size_t i = 0; i < mOutputs.size(); i++) {
760            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
761            if (!desc->isDuplicated() && (profile == desc->mProfile)) {
762                outputDesc = desc;
763                // reuse direct output if currently open and configured with same parameters
764                if ((samplingRate == outputDesc->mSamplingRate) &&
765                        (format == outputDesc->mFormat) &&
766                        (channelMask == outputDesc->mChannelMask)) {
767                    outputDesc->mDirectOpenCount++;
768                    ALOGV("getOutput() reusing direct output %d", mOutputs.keyAt(i));
769                    return mOutputs.keyAt(i);
770                }
771            }
772        }
773        // close direct output if currently open and configured with different parameters
774        if (outputDesc != NULL) {
775            closeOutput(outputDesc->mIoHandle);
776        }
777        outputDesc = new AudioOutputDescriptor(profile);
778        outputDesc->mDevice = device;
779        outputDesc->mLatency = 0;
780        outputDesc->mFlags =(audio_output_flags_t) (outputDesc->mFlags | flags);
781        audio_config_t config = AUDIO_CONFIG_INITIALIZER;
782        config.sample_rate = samplingRate;
783        config.channel_mask = channelMask;
784        config.format = format;
785        config.offload_info = *offloadInfo;
786        status = mpClientInterface->openOutput(profile->mModule->mHandle,
787                                               &output,
788                                               &config,
789                                               &outputDesc->mDevice,
790                                               String8(""),
791                                               &outputDesc->mLatency,
792                                               outputDesc->mFlags);
793
794        // only accept an output with the requested parameters
795        if (status != NO_ERROR ||
796            (samplingRate != 0 && samplingRate != config.sample_rate) ||
797            (format != AUDIO_FORMAT_DEFAULT && format != config.format) ||
798            (channelMask != 0 && channelMask != config.channel_mask)) {
799            ALOGV("getOutput() failed opening direct output: output %d samplingRate %d %d,"
800                    "format %d %d, channelMask %04x %04x", output, samplingRate,
801                    outputDesc->mSamplingRate, format, outputDesc->mFormat, channelMask,
802                    outputDesc->mChannelMask);
803            if (output != AUDIO_IO_HANDLE_NONE) {
804                mpClientInterface->closeOutput(output);
805            }
806            return AUDIO_IO_HANDLE_NONE;
807        }
808        outputDesc->mSamplingRate = config.sample_rate;
809        outputDesc->mChannelMask = config.channel_mask;
810        outputDesc->mFormat = config.format;
811        outputDesc->mRefCount[stream] = 0;
812        outputDesc->mStopTime[stream] = 0;
813        outputDesc->mDirectOpenCount = 1;
814
815        audio_io_handle_t srcOutput = getOutputForEffect();
816        addOutput(output, outputDesc);
817        audio_io_handle_t dstOutput = getOutputForEffect();
818        if (dstOutput == output) {
819            mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, srcOutput, dstOutput);
820        }
821        mPreviousOutputs = mOutputs;
822        ALOGV("getOutput() returns new direct output %d", output);
823        mpClientInterface->onAudioPortListUpdate();
824        return output;
825    }
826
827    // ignoring channel mask due to downmix capability in mixer
828
829    // open a non direct output
830
831    // for non direct outputs, only PCM is supported
832    if (audio_is_linear_pcm(format)) {
833        // get which output is suitable for the specified stream. The actual
834        // routing change will happen when startOutput() will be called
835        SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
836
837        output = selectOutput(outputs, flags);
838    }
839    ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
840            "format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
841
842    ALOGV("getOutput() returns output %d", output);
843
844    return output;
845}
846
847audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
848                                                       audio_output_flags_t flags)
849{
850    // select one output among several that provide a path to a particular device or set of
851    // devices (the list was previously build by getOutputsForDevice()).
852    // The priority is as follows:
853    // 1: the output with the highest number of requested policy flags
854    // 2: the primary output
855    // 3: the first output in the list
856
857    if (outputs.size() == 0) {
858        return 0;
859    }
860    if (outputs.size() == 1) {
861        return outputs[0];
862    }
863
864    int maxCommonFlags = 0;
865    audio_io_handle_t outputFlags = 0;
866    audio_io_handle_t outputPrimary = 0;
867
868    for (size_t i = 0; i < outputs.size(); i++) {
869        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
870        if (!outputDesc->isDuplicated()) {
871            int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
872            if (commonFlags > maxCommonFlags) {
873                outputFlags = outputs[i];
874                maxCommonFlags = commonFlags;
875                ALOGV("selectOutput() commonFlags for output %d, %04x", outputs[i], commonFlags);
876            }
877            if (outputDesc->mProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
878                outputPrimary = outputs[i];
879            }
880        }
881    }
882
883    if (outputFlags != 0) {
884        return outputFlags;
885    }
886    if (outputPrimary != 0) {
887        return outputPrimary;
888    }
889
890    return outputs[0];
891}
892
893status_t AudioPolicyManager::startOutput(audio_io_handle_t output,
894                                             audio_stream_type_t stream,
895                                             int session)
896{
897    ALOGV("startOutput() output %d, stream %d, session %d", output, stream, session);
898    ssize_t index = mOutputs.indexOfKey(output);
899    if (index < 0) {
900        ALOGW("startOutput() unknown output %d", output);
901        return BAD_VALUE;
902    }
903
904    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
905
906    // increment usage count for this stream on the requested output:
907    // NOTE that the usage count is the same for duplicated output and hardware output which is
908    // necessary for a correct control of hardware output routing by startOutput() and stopOutput()
909    outputDesc->changeRefCount(stream, 1);
910
911    if (outputDesc->mRefCount[stream] == 1) {
912        audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
913        routing_strategy strategy = getStrategy(stream);
914        bool shouldWait = (strategy == STRATEGY_SONIFICATION) ||
915                            (strategy == STRATEGY_SONIFICATION_RESPECTFUL);
916        uint32_t waitMs = 0;
917        bool force = false;
918        for (size_t i = 0; i < mOutputs.size(); i++) {
919            sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
920            if (desc != outputDesc) {
921                // force a device change if any other output is managed by the same hw
922                // module and has a current device selection that differs from selected device.
923                // In this case, the audio HAL must receive the new device selection so that it can
924                // change the device currently selected by the other active output.
925                if (outputDesc->sharesHwModuleWith(desc) &&
926                    desc->device() != newDevice) {
927                    force = true;
928                }
929                // wait for audio on other active outputs to be presented when starting
930                // a notification so that audio focus effect can propagate.
931                uint32_t latency = desc->latency();
932                if (shouldWait && desc->isActive(latency * 2) && (waitMs < latency)) {
933                    waitMs = latency;
934                }
935            }
936        }
937        uint32_t muteWaitMs = setOutputDevice(output, newDevice, force);
938
939        // handle special case for sonification while in call
940        if (isInCall()) {
941            handleIncallSonification(stream, true, false);
942        }
943
944        // apply volume rules for current stream and device if necessary
945        checkAndSetVolume(stream,
946                          mStreams[stream].getVolumeIndex(newDevice),
947                          output,
948                          newDevice);
949
950        // update the outputs if starting an output with a stream that can affect notification
951        // routing
952        handleNotificationRoutingForStream(stream);
953        if (waitMs > muteWaitMs) {
954            usleep((waitMs - muteWaitMs) * 2 * 1000);
955        }
956    }
957    return NO_ERROR;
958}
959
960
961status_t AudioPolicyManager::stopOutput(audio_io_handle_t output,
962                                            audio_stream_type_t stream,
963                                            int session)
964{
965    ALOGV("stopOutput() output %d, stream %d, session %d", output, stream, session);
966    ssize_t index = mOutputs.indexOfKey(output);
967    if (index < 0) {
968        ALOGW("stopOutput() unknown output %d", output);
969        return BAD_VALUE;
970    }
971
972    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
973
974    // handle special case for sonification while in call
975    if (isInCall()) {
976        handleIncallSonification(stream, false, false);
977    }
978
979    if (outputDesc->mRefCount[stream] > 0) {
980        // decrement usage count of this stream on the output
981        outputDesc->changeRefCount(stream, -1);
982        // store time at which the stream was stopped - see isStreamActive()
983        if (outputDesc->mRefCount[stream] == 0) {
984            outputDesc->mStopTime[stream] = systemTime();
985            audio_devices_t newDevice = getNewOutputDevice(output, false /*fromCache*/);
986            // delay the device switch by twice the latency because stopOutput() is executed when
987            // the track stop() command is received and at that time the audio track buffer can
988            // still contain data that needs to be drained. The latency only covers the audio HAL
989            // and kernel buffers. Also the latency does not always include additional delay in the
990            // audio path (audio DSP, CODEC ...)
991            setOutputDevice(output, newDevice, false, outputDesc->mLatency*2);
992
993            // force restoring the device selection on other active outputs if it differs from the
994            // one being selected for this output
995            for (size_t i = 0; i < mOutputs.size(); i++) {
996                audio_io_handle_t curOutput = mOutputs.keyAt(i);
997                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(i);
998                if (curOutput != output &&
999                        desc->isActive() &&
1000                        outputDesc->sharesHwModuleWith(desc) &&
1001                        (newDevice != desc->device())) {
1002                    setOutputDevice(curOutput,
1003                                    getNewOutputDevice(curOutput, false /*fromCache*/),
1004                                    true,
1005                                    outputDesc->mLatency*2);
1006                }
1007            }
1008            // update the outputs if stopping one with a stream that can affect notification routing
1009            handleNotificationRoutingForStream(stream);
1010        }
1011        return NO_ERROR;
1012    } else {
1013        ALOGW("stopOutput() refcount is already 0 for output %d", output);
1014        return INVALID_OPERATION;
1015    }
1016}
1017
1018void AudioPolicyManager::releaseOutput(audio_io_handle_t output)
1019{
1020    ALOGV("releaseOutput() %d", output);
1021    ssize_t index = mOutputs.indexOfKey(output);
1022    if (index < 0) {
1023        ALOGW("releaseOutput() releasing unknown output %d", output);
1024        return;
1025    }
1026
1027#ifdef AUDIO_POLICY_TEST
1028    int testIndex = testOutputIndex(output);
1029    if (testIndex != 0) {
1030        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(index);
1031        if (outputDesc->isActive()) {
1032            mpClientInterface->closeOutput(output);
1033            mOutputs.removeItem(output);
1034            mTestOutputs[testIndex] = 0;
1035        }
1036        return;
1037    }
1038#endif //AUDIO_POLICY_TEST
1039
1040    sp<AudioOutputDescriptor> desc = mOutputs.valueAt(index);
1041    if (desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
1042        if (desc->mDirectOpenCount <= 0) {
1043            ALOGW("releaseOutput() invalid open count %d for output %d",
1044                                                              desc->mDirectOpenCount, output);
1045            return;
1046        }
1047        if (--desc->mDirectOpenCount == 0) {
1048            closeOutput(output);
1049            // If effects where present on the output, audioflinger moved them to the primary
1050            // output by default: move them back to the appropriate output.
1051            audio_io_handle_t dstOutput = getOutputForEffect();
1052            if (dstOutput != mPrimaryOutput) {
1053                mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, mPrimaryOutput, dstOutput);
1054            }
1055            mpClientInterface->onAudioPortListUpdate();
1056        }
1057    }
1058}
1059
1060
1061audio_io_handle_t AudioPolicyManager::getInput(audio_source_t inputSource,
1062                                    uint32_t samplingRate,
1063                                    audio_format_t format,
1064                                    audio_channel_mask_t channelMask,
1065                                    audio_session_t session,
1066                                    audio_input_flags_t flags)
1067{
1068    ALOGV("getInput() inputSource %d, samplingRate %d, format %d, channelMask %x, session %d, "
1069          "flags %#x",
1070          inputSource, samplingRate, format, channelMask, session, flags);
1071
1072    audio_devices_t device = getDeviceForInputSource(inputSource);
1073
1074    if (device == AUDIO_DEVICE_NONE) {
1075        ALOGW("getInput() could not find device for inputSource %d", inputSource);
1076        return AUDIO_IO_HANDLE_NONE;
1077    }
1078
1079    // adapt channel selection to input source
1080    switch (inputSource) {
1081    case AUDIO_SOURCE_VOICE_UPLINK:
1082        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK;
1083        break;
1084    case AUDIO_SOURCE_VOICE_DOWNLINK:
1085        channelMask = AUDIO_CHANNEL_IN_VOICE_DNLINK;
1086        break;
1087    case AUDIO_SOURCE_VOICE_CALL:
1088        channelMask = AUDIO_CHANNEL_IN_VOICE_UPLINK | AUDIO_CHANNEL_IN_VOICE_DNLINK;
1089        break;
1090    default:
1091        break;
1092    }
1093
1094    sp<IOProfile> profile = getInputProfile(device,
1095                                         samplingRate,
1096                                         format,
1097                                         channelMask,
1098                                         flags);
1099    if (profile == 0) {
1100        ALOGW("getInput() could not find profile for device 0x%X, samplingRate %u, format %#x, "
1101                "channelMask 0x%X, flags %#x",
1102                device, samplingRate, format, channelMask, flags);
1103        return AUDIO_IO_HANDLE_NONE;
1104    }
1105
1106    if (profile->mModule->mHandle == 0) {
1107        ALOGE("getInput(): HW module %s not opened", profile->mModule->mName);
1108        return AUDIO_IO_HANDLE_NONE;
1109    }
1110
1111    audio_config_t config = AUDIO_CONFIG_INITIALIZER;
1112    config.sample_rate = samplingRate;
1113    config.channel_mask = channelMask;
1114    config.format = format;
1115    audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
1116    status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
1117                                                   &input,
1118                                                   &config,
1119                                                   &device,
1120                                                   String8(""),
1121                                                   inputSource,
1122                                                   flags);
1123
1124    // only accept input with the exact requested set of parameters
1125    if (status != NO_ERROR ||
1126        (samplingRate != config.sample_rate) ||
1127        (format != config.format) ||
1128        (channelMask != config.channel_mask)) {
1129        ALOGW("getInput() failed opening input: samplingRate %d, format %d, channelMask %x",
1130                samplingRate, format, channelMask);
1131        if (input != AUDIO_IO_HANDLE_NONE) {
1132            mpClientInterface->closeInput(input);
1133        }
1134        return AUDIO_IO_HANDLE_NONE;
1135    }
1136
1137    sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(profile);
1138    inputDesc->mInputSource = inputSource;
1139    inputDesc->mRefCount = 0;
1140    inputDesc->mOpenRefCount = 1;
1141    inputDesc->mSamplingRate = samplingRate;
1142    inputDesc->mFormat = format;
1143    inputDesc->mChannelMask = channelMask;
1144    inputDesc->mDevice = device;
1145    inputDesc->mSessions.add(session);
1146
1147    addInput(input, inputDesc);
1148    mpClientInterface->onAudioPortListUpdate();
1149    return input;
1150}
1151
1152status_t AudioPolicyManager::startInput(audio_io_handle_t input,
1153                                        audio_session_t session)
1154{
1155    ALOGV("startInput() input %d", input);
1156    ssize_t index = mInputs.indexOfKey(input);
1157    if (index < 0) {
1158        ALOGW("startInput() unknown input %d", input);
1159        return BAD_VALUE;
1160    }
1161    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1162
1163    index = inputDesc->mSessions.indexOf(session);
1164    if (index < 0) {
1165        ALOGW("startInput() unknown session %d on input %d", session, input);
1166        return BAD_VALUE;
1167    }
1168
1169    // virtual input devices are compatible with other input devices
1170    if (!isVirtualInputDevice(inputDesc->mDevice)) {
1171
1172        // for a non-virtual input device, check if there is another (non-virtual) active input
1173        audio_io_handle_t activeInput = getActiveInput();
1174        if (activeInput != 0 && activeInput != input) {
1175
1176            // If the already active input uses AUDIO_SOURCE_HOTWORD then it is closed,
1177            // otherwise the active input continues and the new input cannot be started.
1178            sp<AudioInputDescriptor> activeDesc = mInputs.valueFor(activeInput);
1179            if (activeDesc->mInputSource == AUDIO_SOURCE_HOTWORD) {
1180                ALOGW("startInput(%d) preempting low-priority input %d", input, activeInput);
1181                stopInput(activeInput, activeDesc->mSessions.itemAt(0));
1182                releaseInput(activeInput, activeDesc->mSessions.itemAt(0));
1183            } else {
1184                ALOGE("startInput(%d) failed: other input %d already started", input, activeInput);
1185                return INVALID_OPERATION;
1186            }
1187        }
1188    }
1189
1190    if (inputDesc->mRefCount == 0) {
1191        setInputDevice(input, getNewInputDevice(input), true /* force */);
1192
1193        // Automatically enable the remote submix output when input is started.
1194        // For remote submix (a virtual device), we open only one input per capture request.
1195        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1196            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1197                    AUDIO_POLICY_DEVICE_STATE_AVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1198        }
1199    }
1200
1201    ALOGV("AudioPolicyManager::startInput() input source = %d", inputDesc->mInputSource);
1202
1203    inputDesc->mRefCount++;
1204    return NO_ERROR;
1205}
1206
1207status_t AudioPolicyManager::stopInput(audio_io_handle_t input,
1208                                       audio_session_t session)
1209{
1210    ALOGV("stopInput() input %d", input);
1211    ssize_t index = mInputs.indexOfKey(input);
1212    if (index < 0) {
1213        ALOGW("stopInput() unknown input %d", input);
1214        return BAD_VALUE;
1215    }
1216    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1217
1218    index = inputDesc->mSessions.indexOf(session);
1219    if (index < 0) {
1220        ALOGW("stopInput() unknown session %d on input %d", session, input);
1221        return BAD_VALUE;
1222    }
1223
1224    if (inputDesc->mRefCount == 0) {
1225        ALOGW("stopInput() input %d already stopped", input);
1226        return INVALID_OPERATION;
1227    }
1228
1229    inputDesc->mRefCount--;
1230    if (inputDesc->mRefCount == 0) {
1231
1232        // automatically disable the remote submix output when input is stopped
1233        if (audio_is_remote_submix_device(inputDesc->mDevice)) {
1234            setDeviceConnectionState(AUDIO_DEVICE_OUT_REMOTE_SUBMIX,
1235                    AUDIO_POLICY_DEVICE_STATE_UNAVAILABLE, AUDIO_REMOTE_SUBMIX_DEVICE_ADDRESS);
1236        }
1237
1238        resetInputDevice(input);
1239    }
1240    return NO_ERROR;
1241}
1242
1243void AudioPolicyManager::releaseInput(audio_io_handle_t input,
1244                                      audio_session_t session)
1245{
1246    ALOGV("releaseInput() %d", input);
1247    ssize_t index = mInputs.indexOfKey(input);
1248    if (index < 0) {
1249        ALOGW("releaseInput() releasing unknown input %d", input);
1250        return;
1251    }
1252    sp<AudioInputDescriptor> inputDesc = mInputs.valueAt(index);
1253    ALOG_ASSERT(inputDesc != 0);
1254
1255    index = inputDesc->mSessions.indexOf(session);
1256    if (index < 0) {
1257        ALOGW("releaseInput() unknown session %d on input %d", session, input);
1258        return;
1259    }
1260    inputDesc->mSessions.remove(session);
1261    if (inputDesc->mOpenRefCount == 0) {
1262        ALOGW("releaseInput() invalid open ref count %d", inputDesc->mOpenRefCount);
1263        return;
1264    }
1265    inputDesc->mOpenRefCount--;
1266    if (inputDesc->mOpenRefCount > 0) {
1267        ALOGV("releaseInput() exit > 0");
1268        return;
1269    }
1270
1271    mpClientInterface->closeInput(input);
1272    mInputs.removeItem(input);
1273    nextAudioPortGeneration();
1274    mpClientInterface->onAudioPortListUpdate();
1275    ALOGV("releaseInput() exit");
1276}
1277
1278void AudioPolicyManager::closeAllInputs() {
1279    for(size_t input_index = 0; input_index < mInputs.size(); input_index++) {
1280        mpClientInterface->closeInput(mInputs.keyAt(input_index));
1281    }
1282    mInputs.clear();
1283    nextAudioPortGeneration();
1284}
1285
1286void AudioPolicyManager::initStreamVolume(audio_stream_type_t stream,
1287                                            int indexMin,
1288                                            int indexMax)
1289{
1290    ALOGV("initStreamVolume() stream %d, min %d, max %d", stream , indexMin, indexMax);
1291    if (indexMin < 0 || indexMin >= indexMax) {
1292        ALOGW("initStreamVolume() invalid index limits for stream %d, min %d, max %d", stream , indexMin, indexMax);
1293        return;
1294    }
1295    mStreams[stream].mIndexMin = indexMin;
1296    mStreams[stream].mIndexMax = indexMax;
1297}
1298
1299status_t AudioPolicyManager::setStreamVolumeIndex(audio_stream_type_t stream,
1300                                                      int index,
1301                                                      audio_devices_t device)
1302{
1303
1304    if ((index < mStreams[stream].mIndexMin) || (index > mStreams[stream].mIndexMax)) {
1305        return BAD_VALUE;
1306    }
1307    if (!audio_is_output_device(device)) {
1308        return BAD_VALUE;
1309    }
1310
1311    // Force max volume if stream cannot be muted
1312    if (!mStreams[stream].mCanBeMuted) index = mStreams[stream].mIndexMax;
1313
1314    ALOGV("setStreamVolumeIndex() stream %d, device %04x, index %d",
1315          stream, device, index);
1316
1317    // if device is AUDIO_DEVICE_OUT_DEFAULT set default value and
1318    // clear all device specific values
1319    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1320        mStreams[stream].mIndexCur.clear();
1321    }
1322    mStreams[stream].mIndexCur.add(device, index);
1323
1324    // compute and apply stream volume on all outputs according to connected device
1325    status_t status = NO_ERROR;
1326    for (size_t i = 0; i < mOutputs.size(); i++) {
1327        audio_devices_t curDevice =
1328                getDeviceForVolume(mOutputs.valueAt(i)->device());
1329        if ((device == AUDIO_DEVICE_OUT_DEFAULT) || (device == curDevice)) {
1330            status_t volStatus = checkAndSetVolume(stream, index, mOutputs.keyAt(i), curDevice);
1331            if (volStatus != NO_ERROR) {
1332                status = volStatus;
1333            }
1334        }
1335    }
1336    return status;
1337}
1338
1339status_t AudioPolicyManager::getStreamVolumeIndex(audio_stream_type_t stream,
1340                                                      int *index,
1341                                                      audio_devices_t device)
1342{
1343    if (index == NULL) {
1344        return BAD_VALUE;
1345    }
1346    if (!audio_is_output_device(device)) {
1347        return BAD_VALUE;
1348    }
1349    // if device is AUDIO_DEVICE_OUT_DEFAULT, return volume for device corresponding to
1350    // the strategy the stream belongs to.
1351    if (device == AUDIO_DEVICE_OUT_DEFAULT) {
1352        device = getDeviceForStrategy(getStrategy(stream), true /*fromCache*/);
1353    }
1354    device = getDeviceForVolume(device);
1355
1356    *index =  mStreams[stream].getVolumeIndex(device);
1357    ALOGV("getStreamVolumeIndex() stream %d device %08x index %d", stream, device, *index);
1358    return NO_ERROR;
1359}
1360
1361audio_io_handle_t AudioPolicyManager::selectOutputForEffects(
1362                                            const SortedVector<audio_io_handle_t>& outputs)
1363{
1364    // select one output among several suitable for global effects.
1365    // The priority is as follows:
1366    // 1: An offloaded output. If the effect ends up not being offloadable,
1367    //    AudioFlinger will invalidate the track and the offloaded output
1368    //    will be closed causing the effect to be moved to a PCM output.
1369    // 2: A deep buffer output
1370    // 3: the first output in the list
1371
1372    if (outputs.size() == 0) {
1373        return 0;
1374    }
1375
1376    audio_io_handle_t outputOffloaded = 0;
1377    audio_io_handle_t outputDeepBuffer = 0;
1378
1379    for (size_t i = 0; i < outputs.size(); i++) {
1380        sp<AudioOutputDescriptor> desc = mOutputs.valueFor(outputs[i]);
1381        ALOGV("selectOutputForEffects outputs[%zu] flags %x", i, desc->mFlags);
1382        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
1383            outputOffloaded = outputs[i];
1384        }
1385        if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DEEP_BUFFER) != 0) {
1386            outputDeepBuffer = outputs[i];
1387        }
1388    }
1389
1390    ALOGV("selectOutputForEffects outputOffloaded %d outputDeepBuffer %d",
1391          outputOffloaded, outputDeepBuffer);
1392    if (outputOffloaded != 0) {
1393        return outputOffloaded;
1394    }
1395    if (outputDeepBuffer != 0) {
1396        return outputDeepBuffer;
1397    }
1398
1399    return outputs[0];
1400}
1401
1402audio_io_handle_t AudioPolicyManager::getOutputForEffect(const effect_descriptor_t *desc)
1403{
1404    // apply simple rule where global effects are attached to the same output as MUSIC streams
1405
1406    routing_strategy strategy = getStrategy(AUDIO_STREAM_MUSIC);
1407    audio_devices_t device = getDeviceForStrategy(strategy, false /*fromCache*/);
1408    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(device, mOutputs);
1409
1410    audio_io_handle_t output = selectOutputForEffects(dstOutputs);
1411    ALOGV("getOutputForEffect() got output %d for fx %s flags %x",
1412          output, (desc == NULL) ? "unspecified" : desc->name,  (desc == NULL) ? 0 : desc->flags);
1413
1414    return output;
1415}
1416
1417status_t AudioPolicyManager::registerEffect(const effect_descriptor_t *desc,
1418                                audio_io_handle_t io,
1419                                uint32_t strategy,
1420                                int session,
1421                                int id)
1422{
1423    ssize_t index = mOutputs.indexOfKey(io);
1424    if (index < 0) {
1425        index = mInputs.indexOfKey(io);
1426        if (index < 0) {
1427            ALOGW("registerEffect() unknown io %d", io);
1428            return INVALID_OPERATION;
1429        }
1430    }
1431
1432    if (mTotalEffectsMemory + desc->memoryUsage > getMaxEffectsMemory()) {
1433        ALOGW("registerEffect() memory limit exceeded for Fx %s, Memory %d KB",
1434                desc->name, desc->memoryUsage);
1435        return INVALID_OPERATION;
1436    }
1437    mTotalEffectsMemory += desc->memoryUsage;
1438    ALOGV("registerEffect() effect %s, io %d, strategy %d session %d id %d",
1439            desc->name, io, strategy, session, id);
1440    ALOGV("registerEffect() memory %d, total memory %d", desc->memoryUsage, mTotalEffectsMemory);
1441
1442    sp<EffectDescriptor> effectDesc = new EffectDescriptor();
1443    memcpy (&effectDesc->mDesc, desc, sizeof(effect_descriptor_t));
1444    effectDesc->mIo = io;
1445    effectDesc->mStrategy = (routing_strategy)strategy;
1446    effectDesc->mSession = session;
1447    effectDesc->mEnabled = false;
1448
1449    mEffects.add(id, effectDesc);
1450
1451    return NO_ERROR;
1452}
1453
1454status_t AudioPolicyManager::unregisterEffect(int id)
1455{
1456    ssize_t index = mEffects.indexOfKey(id);
1457    if (index < 0) {
1458        ALOGW("unregisterEffect() unknown effect ID %d", id);
1459        return INVALID_OPERATION;
1460    }
1461
1462    sp<EffectDescriptor> effectDesc = mEffects.valueAt(index);
1463
1464    setEffectEnabled(effectDesc, false);
1465
1466    if (mTotalEffectsMemory < effectDesc->mDesc.memoryUsage) {
1467        ALOGW("unregisterEffect() memory %d too big for total %d",
1468                effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1469        effectDesc->mDesc.memoryUsage = mTotalEffectsMemory;
1470    }
1471    mTotalEffectsMemory -= effectDesc->mDesc.memoryUsage;
1472    ALOGV("unregisterEffect() effect %s, ID %d, memory %d total memory %d",
1473            effectDesc->mDesc.name, id, effectDesc->mDesc.memoryUsage, mTotalEffectsMemory);
1474
1475    mEffects.removeItem(id);
1476
1477    return NO_ERROR;
1478}
1479
1480status_t AudioPolicyManager::setEffectEnabled(int id, bool enabled)
1481{
1482    ssize_t index = mEffects.indexOfKey(id);
1483    if (index < 0) {
1484        ALOGW("unregisterEffect() unknown effect ID %d", id);
1485        return INVALID_OPERATION;
1486    }
1487
1488    return setEffectEnabled(mEffects.valueAt(index), enabled);
1489}
1490
1491status_t AudioPolicyManager::setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled)
1492{
1493    if (enabled == effectDesc->mEnabled) {
1494        ALOGV("setEffectEnabled(%s) effect already %s",
1495             enabled?"true":"false", enabled?"enabled":"disabled");
1496        return INVALID_OPERATION;
1497    }
1498
1499    if (enabled) {
1500        if (mTotalEffectsCpuLoad + effectDesc->mDesc.cpuLoad > getMaxEffectsCpuLoad()) {
1501            ALOGW("setEffectEnabled(true) CPU Load limit exceeded for Fx %s, CPU %f MIPS",
1502                 effectDesc->mDesc.name, (float)effectDesc->mDesc.cpuLoad/10);
1503            return INVALID_OPERATION;
1504        }
1505        mTotalEffectsCpuLoad += effectDesc->mDesc.cpuLoad;
1506        ALOGV("setEffectEnabled(true) total CPU %d", mTotalEffectsCpuLoad);
1507    } else {
1508        if (mTotalEffectsCpuLoad < effectDesc->mDesc.cpuLoad) {
1509            ALOGW("setEffectEnabled(false) CPU load %d too high for total %d",
1510                    effectDesc->mDesc.cpuLoad, mTotalEffectsCpuLoad);
1511            effectDesc->mDesc.cpuLoad = mTotalEffectsCpuLoad;
1512        }
1513        mTotalEffectsCpuLoad -= effectDesc->mDesc.cpuLoad;
1514        ALOGV("setEffectEnabled(false) total CPU %d", mTotalEffectsCpuLoad);
1515    }
1516    effectDesc->mEnabled = enabled;
1517    return NO_ERROR;
1518}
1519
1520bool AudioPolicyManager::isNonOffloadableEffectEnabled()
1521{
1522    for (size_t i = 0; i < mEffects.size(); i++) {
1523        sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
1524        if (effectDesc->mEnabled && (effectDesc->mStrategy == STRATEGY_MEDIA) &&
1525                ((effectDesc->mDesc.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) == 0)) {
1526            ALOGV("isNonOffloadableEffectEnabled() non offloadable effect %s enabled on session %d",
1527                  effectDesc->mDesc.name, effectDesc->mSession);
1528            return true;
1529        }
1530    }
1531    return false;
1532}
1533
1534bool AudioPolicyManager::isStreamActive(audio_stream_type_t stream, uint32_t inPastMs) const
1535{
1536    nsecs_t sysTime = systemTime();
1537    for (size_t i = 0; i < mOutputs.size(); i++) {
1538        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1539        if (outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1540            return true;
1541        }
1542    }
1543    return false;
1544}
1545
1546bool AudioPolicyManager::isStreamActiveRemotely(audio_stream_type_t stream,
1547                                                    uint32_t inPastMs) const
1548{
1549    nsecs_t sysTime = systemTime();
1550    for (size_t i = 0; i < mOutputs.size(); i++) {
1551        const sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
1552        if (((outputDesc->device() & APM_AUDIO_OUT_DEVICE_REMOTE_ALL) != 0) &&
1553                outputDesc->isStreamActive(stream, inPastMs, sysTime)) {
1554            return true;
1555        }
1556    }
1557    return false;
1558}
1559
1560bool AudioPolicyManager::isSourceActive(audio_source_t source) const
1561{
1562    for (size_t i = 0; i < mInputs.size(); i++) {
1563        const sp<AudioInputDescriptor>  inputDescriptor = mInputs.valueAt(i);
1564        if ((inputDescriptor->mInputSource == (int)source ||
1565                (source == AUDIO_SOURCE_VOICE_RECOGNITION &&
1566                 inputDescriptor->mInputSource == AUDIO_SOURCE_HOTWORD))
1567             && (inputDescriptor->mRefCount > 0)) {
1568            return true;
1569        }
1570    }
1571    return false;
1572}
1573
1574
1575status_t AudioPolicyManager::dump(int fd)
1576{
1577    const size_t SIZE = 256;
1578    char buffer[SIZE];
1579    String8 result;
1580
1581    snprintf(buffer, SIZE, "\nAudioPolicyManager Dump: %p\n", this);
1582    result.append(buffer);
1583
1584    snprintf(buffer, SIZE, " Primary Output: %d\n", mPrimaryOutput);
1585    result.append(buffer);
1586    snprintf(buffer, SIZE, " Phone state: %d\n", mPhoneState);
1587    result.append(buffer);
1588    snprintf(buffer, SIZE, " Force use for communications %d\n",
1589             mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
1590    result.append(buffer);
1591    snprintf(buffer, SIZE, " Force use for media %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA]);
1592    result.append(buffer);
1593    snprintf(buffer, SIZE, " Force use for record %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD]);
1594    result.append(buffer);
1595    snprintf(buffer, SIZE, " Force use for dock %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK]);
1596    result.append(buffer);
1597    snprintf(buffer, SIZE, " Force use for system %d\n", mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM]);
1598    result.append(buffer);
1599    snprintf(buffer, SIZE, " Force use for hdmi system audio %d\n",
1600            mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO]);
1601    result.append(buffer);
1602
1603    snprintf(buffer, SIZE, " Available output devices:\n");
1604    result.append(buffer);
1605    write(fd, result.string(), result.size());
1606    for (size_t i = 0; i < mAvailableOutputDevices.size(); i++) {
1607        mAvailableOutputDevices[i]->dump(fd, 2, i);
1608    }
1609    snprintf(buffer, SIZE, "\n Available input devices:\n");
1610    write(fd, buffer, strlen(buffer));
1611    for (size_t i = 0; i < mAvailableInputDevices.size(); i++) {
1612        mAvailableInputDevices[i]->dump(fd, 2, i);
1613    }
1614
1615    snprintf(buffer, SIZE, "\nHW Modules dump:\n");
1616    write(fd, buffer, strlen(buffer));
1617    for (size_t i = 0; i < mHwModules.size(); i++) {
1618        snprintf(buffer, SIZE, "- HW Module %zu:\n", i + 1);
1619        write(fd, buffer, strlen(buffer));
1620        mHwModules[i]->dump(fd);
1621    }
1622
1623    snprintf(buffer, SIZE, "\nOutputs dump:\n");
1624    write(fd, buffer, strlen(buffer));
1625    for (size_t i = 0; i < mOutputs.size(); i++) {
1626        snprintf(buffer, SIZE, "- Output %d dump:\n", mOutputs.keyAt(i));
1627        write(fd, buffer, strlen(buffer));
1628        mOutputs.valueAt(i)->dump(fd);
1629    }
1630
1631    snprintf(buffer, SIZE, "\nInputs dump:\n");
1632    write(fd, buffer, strlen(buffer));
1633    for (size_t i = 0; i < mInputs.size(); i++) {
1634        snprintf(buffer, SIZE, "- Input %d dump:\n", mInputs.keyAt(i));
1635        write(fd, buffer, strlen(buffer));
1636        mInputs.valueAt(i)->dump(fd);
1637    }
1638
1639    snprintf(buffer, SIZE, "\nStreams dump:\n");
1640    write(fd, buffer, strlen(buffer));
1641    snprintf(buffer, SIZE,
1642             " Stream  Can be muted  Index Min  Index Max  Index Cur [device : index]...\n");
1643    write(fd, buffer, strlen(buffer));
1644    for (size_t i = 0; i < AUDIO_STREAM_CNT; i++) {
1645        snprintf(buffer, SIZE, " %02zu      ", i);
1646        write(fd, buffer, strlen(buffer));
1647        mStreams[i].dump(fd);
1648    }
1649
1650    snprintf(buffer, SIZE, "\nTotal Effects CPU: %f MIPS, Total Effects memory: %d KB\n",
1651            (float)mTotalEffectsCpuLoad/10, mTotalEffectsMemory);
1652    write(fd, buffer, strlen(buffer));
1653
1654    snprintf(buffer, SIZE, "Registered effects:\n");
1655    write(fd, buffer, strlen(buffer));
1656    for (size_t i = 0; i < mEffects.size(); i++) {
1657        snprintf(buffer, SIZE, "- Effect %d dump:\n", mEffects.keyAt(i));
1658        write(fd, buffer, strlen(buffer));
1659        mEffects.valueAt(i)->dump(fd);
1660    }
1661
1662
1663    return NO_ERROR;
1664}
1665
1666// This function checks for the parameters which can be offloaded.
1667// This can be enhanced depending on the capability of the DSP and policy
1668// of the system.
1669bool AudioPolicyManager::isOffloadSupported(const audio_offload_info_t& offloadInfo)
1670{
1671    ALOGV("isOffloadSupported: SR=%u, CM=0x%x, Format=0x%x, StreamType=%d,"
1672     " BitRate=%u, duration=%" PRId64 " us, has_video=%d",
1673     offloadInfo.sample_rate, offloadInfo.channel_mask,
1674     offloadInfo.format,
1675     offloadInfo.stream_type, offloadInfo.bit_rate, offloadInfo.duration_us,
1676     offloadInfo.has_video);
1677
1678    // Check if offload has been disabled
1679    char propValue[PROPERTY_VALUE_MAX];
1680    if (property_get("audio.offload.disable", propValue, "0")) {
1681        if (atoi(propValue) != 0) {
1682            ALOGV("offload disabled by audio.offload.disable=%s", propValue );
1683            return false;
1684        }
1685    }
1686
1687    // Check if stream type is music, then only allow offload as of now.
1688    if (offloadInfo.stream_type != AUDIO_STREAM_MUSIC)
1689    {
1690        ALOGV("isOffloadSupported: stream_type != MUSIC, returning false");
1691        return false;
1692    }
1693
1694    //TODO: enable audio offloading with video when ready
1695    if (offloadInfo.has_video)
1696    {
1697        ALOGV("isOffloadSupported: has_video == true, returning false");
1698        return false;
1699    }
1700
1701    //If duration is less than minimum value defined in property, return false
1702    if (property_get("audio.offload.min.duration.secs", propValue, NULL)) {
1703        if (offloadInfo.duration_us < (atoi(propValue) * 1000000 )) {
1704            ALOGV("Offload denied by duration < audio.offload.min.duration.secs(=%s)", propValue);
1705            return false;
1706        }
1707    } else if (offloadInfo.duration_us < OFFLOAD_DEFAULT_MIN_DURATION_SECS * 1000000) {
1708        ALOGV("Offload denied by duration < default min(=%u)", OFFLOAD_DEFAULT_MIN_DURATION_SECS);
1709        return false;
1710    }
1711
1712    // Do not allow offloading if one non offloadable effect is enabled. This prevents from
1713    // creating an offloaded track and tearing it down immediately after start when audioflinger
1714    // detects there is an active non offloadable effect.
1715    // FIXME: We should check the audio session here but we do not have it in this context.
1716    // This may prevent offloading in rare situations where effects are left active by apps
1717    // in the background.
1718    if (isNonOffloadableEffectEnabled()) {
1719        return false;
1720    }
1721
1722    // See if there is a profile to support this.
1723    // AUDIO_DEVICE_NONE
1724    sp<IOProfile> profile = getProfileForDirectOutput(AUDIO_DEVICE_NONE /*ignore device */,
1725                                            offloadInfo.sample_rate,
1726                                            offloadInfo.format,
1727                                            offloadInfo.channel_mask,
1728                                            AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD);
1729    ALOGV("isOffloadSupported() profile %sfound", profile != 0 ? "" : "NOT ");
1730    return (profile != 0);
1731}
1732
1733status_t AudioPolicyManager::listAudioPorts(audio_port_role_t role,
1734                                            audio_port_type_t type,
1735                                            unsigned int *num_ports,
1736                                            struct audio_port *ports,
1737                                            unsigned int *generation)
1738{
1739    if (num_ports == NULL || (*num_ports != 0 && ports == NULL) ||
1740            generation == NULL) {
1741        return BAD_VALUE;
1742    }
1743    ALOGV("listAudioPorts() role %d type %d num_ports %d ports %p", role, type, *num_ports, ports);
1744    if (ports == NULL) {
1745        *num_ports = 0;
1746    }
1747
1748    size_t portsWritten = 0;
1749    size_t portsMax = *num_ports;
1750    *num_ports = 0;
1751    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_DEVICE) {
1752        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1753            for (size_t i = 0;
1754                    i  < mAvailableOutputDevices.size() && portsWritten < portsMax; i++) {
1755                mAvailableOutputDevices[i]->toAudioPort(&ports[portsWritten++]);
1756            }
1757            *num_ports += mAvailableOutputDevices.size();
1758        }
1759        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1760            for (size_t i = 0;
1761                    i  < mAvailableInputDevices.size() && portsWritten < portsMax; i++) {
1762                mAvailableInputDevices[i]->toAudioPort(&ports[portsWritten++]);
1763            }
1764            *num_ports += mAvailableInputDevices.size();
1765        }
1766    }
1767    if (type == AUDIO_PORT_TYPE_NONE || type == AUDIO_PORT_TYPE_MIX) {
1768        if (role == AUDIO_PORT_ROLE_SINK || role == AUDIO_PORT_ROLE_NONE) {
1769            for (size_t i = 0; i < mInputs.size() && portsWritten < portsMax; i++) {
1770                mInputs[i]->toAudioPort(&ports[portsWritten++]);
1771            }
1772            *num_ports += mInputs.size();
1773        }
1774        if (role == AUDIO_PORT_ROLE_SOURCE || role == AUDIO_PORT_ROLE_NONE) {
1775            size_t numOutputs = 0;
1776            for (size_t i = 0; i < mOutputs.size(); i++) {
1777                if (!mOutputs[i]->isDuplicated()) {
1778                    numOutputs++;
1779                    if (portsWritten < portsMax) {
1780                        mOutputs[i]->toAudioPort(&ports[portsWritten++]);
1781                    }
1782                }
1783            }
1784            *num_ports += numOutputs;
1785        }
1786    }
1787    *generation = curAudioPortGeneration();
1788    ALOGV("listAudioPorts() got %zu ports needed %d", portsWritten, *num_ports);
1789    return NO_ERROR;
1790}
1791
1792status_t AudioPolicyManager::getAudioPort(struct audio_port *port __unused)
1793{
1794    return NO_ERROR;
1795}
1796
1797sp<AudioPolicyManager::AudioOutputDescriptor> AudioPolicyManager::getOutputFromId(
1798                                                                    audio_port_handle_t id) const
1799{
1800    sp<AudioOutputDescriptor> outputDesc = NULL;
1801    for (size_t i = 0; i < mOutputs.size(); i++) {
1802        outputDesc = mOutputs.valueAt(i);
1803        if (outputDesc->mId == id) {
1804            break;
1805        }
1806    }
1807    return outputDesc;
1808}
1809
1810sp<AudioPolicyManager::AudioInputDescriptor> AudioPolicyManager::getInputFromId(
1811                                                                    audio_port_handle_t id) const
1812{
1813    sp<AudioInputDescriptor> inputDesc = NULL;
1814    for (size_t i = 0; i < mInputs.size(); i++) {
1815        inputDesc = mInputs.valueAt(i);
1816        if (inputDesc->mId == id) {
1817            break;
1818        }
1819    }
1820    return inputDesc;
1821}
1822
1823sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleForDevice(
1824                                                                    audio_devices_t device) const
1825{
1826    sp <HwModule> module;
1827
1828    for (size_t i = 0; i < mHwModules.size(); i++) {
1829        if (mHwModules[i]->mHandle == 0) {
1830            continue;
1831        }
1832        if (audio_is_output_device(device)) {
1833            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
1834            {
1835                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
1836                    return mHwModules[i];
1837                }
1838            }
1839        } else {
1840            for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++) {
1841                if (mHwModules[i]->mInputProfiles[j]->mSupportedDevices.types() &
1842                        device & ~AUDIO_DEVICE_BIT_IN) {
1843                    return mHwModules[i];
1844                }
1845            }
1846        }
1847    }
1848    return module;
1849}
1850
1851sp <AudioPolicyManager::HwModule> AudioPolicyManager::getModuleFromName(const char *name) const
1852{
1853    sp <HwModule> module;
1854
1855    for (size_t i = 0; i < mHwModules.size(); i++)
1856    {
1857        if (strcmp(mHwModules[i]->mName, name) == 0) {
1858            return mHwModules[i];
1859        }
1860    }
1861    return module;
1862}
1863
1864
1865status_t AudioPolicyManager::createAudioPatch(const struct audio_patch *patch,
1866                                               audio_patch_handle_t *handle,
1867                                               uid_t uid)
1868{
1869    ALOGV("createAudioPatch()");
1870
1871    if (handle == NULL || patch == NULL) {
1872        return BAD_VALUE;
1873    }
1874    ALOGV("createAudioPatch() num sources %d num sinks %d", patch->num_sources, patch->num_sinks);
1875
1876    if (patch->num_sources > 1 || patch->num_sinks > 1) {
1877        return INVALID_OPERATION;
1878    }
1879    if (patch->sources[0].role != AUDIO_PORT_ROLE_SOURCE ||
1880            patch->sinks[0].role != AUDIO_PORT_ROLE_SINK) {
1881        return INVALID_OPERATION;
1882    }
1883
1884    sp<AudioPatch> patchDesc;
1885    ssize_t index = mAudioPatches.indexOfKey(*handle);
1886
1887    ALOGV("createAudioPatch sink id %d role %d type %d", patch->sinks[0].id, patch->sinks[0].role,
1888                                                         patch->sinks[0].type);
1889    ALOGV("createAudioPatch source id %d role %d type %d", patch->sources[0].id,
1890                                                           patch->sources[0].role,
1891                                                           patch->sources[0].type);
1892
1893    if (index >= 0) {
1894        patchDesc = mAudioPatches.valueAt(index);
1895        ALOGV("createAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
1896                                                                  mUidCached, patchDesc->mUid, uid);
1897        if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
1898            return INVALID_OPERATION;
1899        }
1900    } else {
1901        *handle = 0;
1902    }
1903
1904    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
1905        // TODO add support for mix to mix connection
1906        if (patch->sinks[0].type != AUDIO_PORT_TYPE_DEVICE) {
1907            ALOGV("createAudioPatch() source mix sink not device");
1908            return BAD_VALUE;
1909        }
1910        // output mix to output device connection
1911        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
1912        if (outputDesc == NULL) {
1913            ALOGV("createAudioPatch() output not found for id %d", patch->sources[0].id);
1914            return BAD_VALUE;
1915        }
1916        ALOG_ASSERT(!outputDesc->isDuplicated(),"duplicated output %d in source in ports",
1917                                                outputDesc->mIoHandle);
1918        if (patchDesc != 0) {
1919            if (patchDesc->mPatch.sources[0].id != patch->sources[0].id) {
1920                ALOGV("createAudioPatch() source id differs for patch current id %d new id %d",
1921                                          patchDesc->mPatch.sources[0].id, patch->sources[0].id);
1922                return BAD_VALUE;
1923            }
1924        }
1925        sp<DeviceDescriptor> devDesc =
1926                mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
1927        if (devDesc == 0) {
1928            ALOGV("createAudioPatch() out device not found for id %d", patch->sinks[0].id);
1929            return BAD_VALUE;
1930        }
1931
1932        if (!outputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1933                                                       patch->sources[0].sample_rate,
1934                                                     NULL,  // updatedSamplingRate
1935                                                     patch->sources[0].format,
1936                                                     patch->sources[0].channel_mask,
1937                                                     AUDIO_OUTPUT_FLAG_NONE /*FIXME*/)) {
1938            ALOGV("createAudioPatch() profile not supported");
1939            return INVALID_OPERATION;
1940        }
1941        // TODO: reconfigure output format and channels here
1942        ALOGV("createAudioPatch() setting device %08x on output %d",
1943                                              devDesc->mDeviceType, outputDesc->mIoHandle);
1944        setOutputDevice(outputDesc->mIoHandle,
1945                        devDesc->mDeviceType,
1946                       true,
1947                       0,
1948                       handle);
1949        index = mAudioPatches.indexOfKey(*handle);
1950        if (index >= 0) {
1951            if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
1952                ALOGW("createAudioPatch() setOutputDevice() did not reuse the patch provided");
1953            }
1954            patchDesc = mAudioPatches.valueAt(index);
1955            patchDesc->mUid = uid;
1956            ALOGV("createAudioPatch() success");
1957        } else {
1958            ALOGW("createAudioPatch() setOutputDevice() failed to create a patch");
1959            return INVALID_OPERATION;
1960        }
1961    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
1962        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
1963            // input device to input mix connection
1964            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
1965            if (inputDesc == NULL) {
1966                return BAD_VALUE;
1967            }
1968            if (patchDesc != 0) {
1969                if (patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
1970                    return BAD_VALUE;
1971                }
1972            }
1973            sp<DeviceDescriptor> devDesc =
1974                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
1975            if (devDesc == 0) {
1976                return BAD_VALUE;
1977            }
1978
1979            if (!inputDesc->mProfile->isCompatibleProfile(devDesc->mDeviceType,
1980                                                         patch->sinks[0].sample_rate,
1981                                                         NULL, /*updatedSampleRate*/
1982                                                         patch->sinks[0].format,
1983                                                         patch->sinks[0].channel_mask,
1984                                                         // FIXME for the parameter type,
1985                                                         // and the NONE
1986                                                         (audio_output_flags_t)
1987                                                            AUDIO_INPUT_FLAG_NONE)) {
1988                return INVALID_OPERATION;
1989            }
1990            // TODO: reconfigure output format and channels here
1991            ALOGV("createAudioPatch() setting device %08x on output %d",
1992                                                  devDesc->mDeviceType, inputDesc->mIoHandle);
1993            setInputDevice(inputDesc->mIoHandle,
1994                           devDesc->mDeviceType,
1995                           true,
1996                           handle);
1997            index = mAudioPatches.indexOfKey(*handle);
1998            if (index >= 0) {
1999                if (patchDesc != 0 && patchDesc != mAudioPatches.valueAt(index)) {
2000                    ALOGW("createAudioPatch() setInputDevice() did not reuse the patch provided");
2001                }
2002                patchDesc = mAudioPatches.valueAt(index);
2003                patchDesc->mUid = uid;
2004                ALOGV("createAudioPatch() success");
2005            } else {
2006                ALOGW("createAudioPatch() setInputDevice() failed to create a patch");
2007                return INVALID_OPERATION;
2008            }
2009        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2010            // device to device connection
2011            if (patchDesc != 0) {
2012                if (patchDesc->mPatch.sources[0].id != patch->sources[0].id &&
2013                    patchDesc->mPatch.sinks[0].id != patch->sinks[0].id) {
2014                    return BAD_VALUE;
2015                }
2016            }
2017
2018            sp<DeviceDescriptor> srcDeviceDesc =
2019                    mAvailableInputDevices.getDeviceFromId(patch->sources[0].id);
2020            sp<DeviceDescriptor> sinkDeviceDesc =
2021                    mAvailableOutputDevices.getDeviceFromId(patch->sinks[0].id);
2022            if (srcDeviceDesc == 0 || sinkDeviceDesc == 0) {
2023                return BAD_VALUE;
2024            }
2025            //update source and sink with our own data as the data passed in the patch may
2026            // be incomplete.
2027            struct audio_patch newPatch = *patch;
2028            srcDeviceDesc->toAudioPortConfig(&newPatch.sources[0], &patch->sources[0]);
2029            sinkDeviceDesc->toAudioPortConfig(&newPatch.sinks[0], &patch->sinks[0]);
2030
2031            if (srcDeviceDesc->mModule != sinkDeviceDesc->mModule) {
2032                SortedVector<audio_io_handle_t> outputs =
2033                                        getOutputsForDevice(sinkDeviceDesc->mDeviceType, mOutputs);
2034                // if the sink device is reachable via an opened output stream, request to go via
2035                // this output stream by adding a second source to the patch description
2036                audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
2037                if (output != AUDIO_IO_HANDLE_NONE) {
2038                    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
2039                    if (outputDesc->isDuplicated()) {
2040                        return INVALID_OPERATION;
2041                    }
2042                    outputDesc->toAudioPortConfig(&newPatch.sources[1], &patch->sources[0]);
2043                    newPatch.num_sources = 2;
2044                }
2045            }
2046            // TODO: check from routing capabilities in config file and other conflicting patches
2047
2048            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
2049            if (index >= 0) {
2050                afPatchHandle = patchDesc->mAfPatchHandle;
2051            }
2052
2053            status_t status = mpClientInterface->createAudioPatch(&newPatch,
2054                                                                  &afPatchHandle,
2055                                                                  0);
2056            ALOGV("createAudioPatch() patch panel returned %d patchHandle %d",
2057                                                                  status, afPatchHandle);
2058            if (status == NO_ERROR) {
2059                if (index < 0) {
2060                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
2061                                               &newPatch, uid);
2062                    addAudioPatch(patchDesc->mHandle, patchDesc);
2063                } else {
2064                    patchDesc->mPatch = newPatch;
2065                }
2066                patchDesc->mAfPatchHandle = afPatchHandle;
2067                *handle = patchDesc->mHandle;
2068                nextAudioPortGeneration();
2069                mpClientInterface->onAudioPatchListUpdate();
2070            } else {
2071                ALOGW("createAudioPatch() patch panel could not connect device patch, error %d",
2072                status);
2073                return INVALID_OPERATION;
2074            }
2075        } else {
2076            return BAD_VALUE;
2077        }
2078    } else {
2079        return BAD_VALUE;
2080    }
2081    return NO_ERROR;
2082}
2083
2084status_t AudioPolicyManager::releaseAudioPatch(audio_patch_handle_t handle,
2085                                                  uid_t uid)
2086{
2087    ALOGV("releaseAudioPatch() patch %d", handle);
2088
2089    ssize_t index = mAudioPatches.indexOfKey(handle);
2090
2091    if (index < 0) {
2092        return BAD_VALUE;
2093    }
2094    sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
2095    ALOGV("releaseAudioPatch() mUidCached %d patchDesc->mUid %d uid %d",
2096          mUidCached, patchDesc->mUid, uid);
2097    if (patchDesc->mUid != mUidCached && uid != patchDesc->mUid) {
2098        return INVALID_OPERATION;
2099    }
2100
2101    struct audio_patch *patch = &patchDesc->mPatch;
2102    patchDesc->mUid = mUidCached;
2103    if (patch->sources[0].type == AUDIO_PORT_TYPE_MIX) {
2104        sp<AudioOutputDescriptor> outputDesc = getOutputFromId(patch->sources[0].id);
2105        if (outputDesc == NULL) {
2106            ALOGV("releaseAudioPatch() output not found for id %d", patch->sources[0].id);
2107            return BAD_VALUE;
2108        }
2109
2110        setOutputDevice(outputDesc->mIoHandle,
2111                        getNewOutputDevice(outputDesc->mIoHandle, true /*fromCache*/),
2112                       true,
2113                       0,
2114                       NULL);
2115    } else if (patch->sources[0].type == AUDIO_PORT_TYPE_DEVICE) {
2116        if (patch->sinks[0].type == AUDIO_PORT_TYPE_MIX) {
2117            sp<AudioInputDescriptor> inputDesc = getInputFromId(patch->sinks[0].id);
2118            if (inputDesc == NULL) {
2119                ALOGV("releaseAudioPatch() input not found for id %d", patch->sinks[0].id);
2120                return BAD_VALUE;
2121            }
2122            setInputDevice(inputDesc->mIoHandle,
2123                           getNewInputDevice(inputDesc->mIoHandle),
2124                           true,
2125                           NULL);
2126        } else if (patch->sinks[0].type == AUDIO_PORT_TYPE_DEVICE) {
2127            audio_patch_handle_t afPatchHandle = patchDesc->mAfPatchHandle;
2128            status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
2129            ALOGV("releaseAudioPatch() patch panel returned %d patchHandle %d",
2130                                                              status, patchDesc->mAfPatchHandle);
2131            removeAudioPatch(patchDesc->mHandle);
2132            nextAudioPortGeneration();
2133            mpClientInterface->onAudioPatchListUpdate();
2134        } else {
2135            return BAD_VALUE;
2136        }
2137    } else {
2138        return BAD_VALUE;
2139    }
2140    return NO_ERROR;
2141}
2142
2143status_t AudioPolicyManager::listAudioPatches(unsigned int *num_patches,
2144                                              struct audio_patch *patches,
2145                                              unsigned int *generation)
2146{
2147    if (num_patches == NULL || (*num_patches != 0 && patches == NULL) ||
2148            generation == NULL) {
2149        return BAD_VALUE;
2150    }
2151    ALOGV("listAudioPatches() num_patches %d patches %p available patches %zu",
2152          *num_patches, patches, mAudioPatches.size());
2153    if (patches == NULL) {
2154        *num_patches = 0;
2155    }
2156
2157    size_t patchesWritten = 0;
2158    size_t patchesMax = *num_patches;
2159    for (size_t i = 0;
2160            i  < mAudioPatches.size() && patchesWritten < patchesMax; i++) {
2161        patches[patchesWritten] = mAudioPatches[i]->mPatch;
2162        patches[patchesWritten++].id = mAudioPatches[i]->mHandle;
2163        ALOGV("listAudioPatches() patch %zu num_sources %d num_sinks %d",
2164              i, mAudioPatches[i]->mPatch.num_sources, mAudioPatches[i]->mPatch.num_sinks);
2165    }
2166    *num_patches = mAudioPatches.size();
2167
2168    *generation = curAudioPortGeneration();
2169    ALOGV("listAudioPatches() got %zu patches needed %d", patchesWritten, *num_patches);
2170    return NO_ERROR;
2171}
2172
2173status_t AudioPolicyManager::setAudioPortConfig(const struct audio_port_config *config)
2174{
2175    ALOGV("setAudioPortConfig()");
2176
2177    if (config == NULL) {
2178        return BAD_VALUE;
2179    }
2180    ALOGV("setAudioPortConfig() on port handle %d", config->id);
2181    // Only support gain configuration for now
2182    if (config->config_mask != AUDIO_PORT_CONFIG_GAIN) {
2183        return INVALID_OPERATION;
2184    }
2185
2186    sp<AudioPortConfig> audioPortConfig;
2187    if (config->type == AUDIO_PORT_TYPE_MIX) {
2188        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2189            sp<AudioOutputDescriptor> outputDesc = getOutputFromId(config->id);
2190            if (outputDesc == NULL) {
2191                return BAD_VALUE;
2192            }
2193            ALOG_ASSERT(!outputDesc->isDuplicated(),
2194                        "setAudioPortConfig() called on duplicated output %d",
2195                        outputDesc->mIoHandle);
2196            audioPortConfig = outputDesc;
2197        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2198            sp<AudioInputDescriptor> inputDesc = getInputFromId(config->id);
2199            if (inputDesc == NULL) {
2200                return BAD_VALUE;
2201            }
2202            audioPortConfig = inputDesc;
2203        } else {
2204            return BAD_VALUE;
2205        }
2206    } else if (config->type == AUDIO_PORT_TYPE_DEVICE) {
2207        sp<DeviceDescriptor> deviceDesc;
2208        if (config->role == AUDIO_PORT_ROLE_SOURCE) {
2209            deviceDesc = mAvailableInputDevices.getDeviceFromId(config->id);
2210        } else if (config->role == AUDIO_PORT_ROLE_SINK) {
2211            deviceDesc = mAvailableOutputDevices.getDeviceFromId(config->id);
2212        } else {
2213            return BAD_VALUE;
2214        }
2215        if (deviceDesc == NULL) {
2216            return BAD_VALUE;
2217        }
2218        audioPortConfig = deviceDesc;
2219    } else {
2220        return BAD_VALUE;
2221    }
2222
2223    struct audio_port_config backupConfig;
2224    status_t status = audioPortConfig->applyAudioPortConfig(config, &backupConfig);
2225    if (status == NO_ERROR) {
2226        struct audio_port_config newConfig;
2227        audioPortConfig->toAudioPortConfig(&newConfig, config);
2228        status = mpClientInterface->setAudioPortConfig(&newConfig, 0);
2229    }
2230    if (status != NO_ERROR) {
2231        audioPortConfig->applyAudioPortConfig(&backupConfig);
2232    }
2233
2234    return status;
2235}
2236
2237void AudioPolicyManager::clearAudioPatches(uid_t uid)
2238{
2239    for (ssize_t i = 0; i < (ssize_t)mAudioPatches.size(); i++)  {
2240        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(i);
2241        if (patchDesc->mUid == uid) {
2242            // releaseAudioPatch() removes the patch from mAudioPatches
2243            if (releaseAudioPatch(mAudioPatches.keyAt(i), uid) == NO_ERROR) {
2244                i--;
2245            }
2246        }
2247    }
2248}
2249
2250status_t AudioPolicyManager::addAudioPatch(audio_patch_handle_t handle,
2251                                           const sp<AudioPatch>& patch)
2252{
2253    ssize_t index = mAudioPatches.indexOfKey(handle);
2254
2255    if (index >= 0) {
2256        ALOGW("addAudioPatch() patch %d already in", handle);
2257        return ALREADY_EXISTS;
2258    }
2259    mAudioPatches.add(handle, patch);
2260    ALOGV("addAudioPatch() handle %d af handle %d num_sources %d num_sinks %d source handle %d"
2261            "sink handle %d",
2262          handle, patch->mAfPatchHandle, patch->mPatch.num_sources, patch->mPatch.num_sinks,
2263          patch->mPatch.sources[0].id, patch->mPatch.sinks[0].id);
2264    return NO_ERROR;
2265}
2266
2267status_t AudioPolicyManager::removeAudioPatch(audio_patch_handle_t handle)
2268{
2269    ssize_t index = mAudioPatches.indexOfKey(handle);
2270
2271    if (index < 0) {
2272        ALOGW("removeAudioPatch() patch %d not in", handle);
2273        return ALREADY_EXISTS;
2274    }
2275    ALOGV("removeAudioPatch() handle %d af handle %d", handle,
2276                      mAudioPatches.valueAt(index)->mAfPatchHandle);
2277    mAudioPatches.removeItemsAt(index);
2278    return NO_ERROR;
2279}
2280
2281// ----------------------------------------------------------------------------
2282// AudioPolicyManager
2283// ----------------------------------------------------------------------------
2284
2285uint32_t AudioPolicyManager::nextUniqueId()
2286{
2287    return android_atomic_inc(&mNextUniqueId);
2288}
2289
2290uint32_t AudioPolicyManager::nextAudioPortGeneration()
2291{
2292    return android_atomic_inc(&mAudioPortGeneration);
2293}
2294
2295AudioPolicyManager::AudioPolicyManager(AudioPolicyClientInterface *clientInterface)
2296    :
2297#ifdef AUDIO_POLICY_TEST
2298    Thread(false),
2299#endif //AUDIO_POLICY_TEST
2300    mPrimaryOutput((audio_io_handle_t)0),
2301    mPhoneState(AUDIO_MODE_NORMAL),
2302    mLimitRingtoneVolume(false), mLastVoiceVolume(-1.0f),
2303    mTotalEffectsCpuLoad(0), mTotalEffectsMemory(0),
2304    mA2dpSuspended(false),
2305    mSpeakerDrcEnabled(false), mNextUniqueId(1),
2306    mAudioPortGeneration(1)
2307{
2308    mUidCached = getuid();
2309    mpClientInterface = clientInterface;
2310
2311    for (int i = 0; i < AUDIO_POLICY_FORCE_USE_CNT; i++) {
2312        mForceUse[i] = AUDIO_POLICY_FORCE_NONE;
2313    }
2314
2315    mDefaultOutputDevice = new DeviceDescriptor(String8(""), AUDIO_DEVICE_OUT_SPEAKER);
2316    if (loadAudioPolicyConfig(AUDIO_POLICY_VENDOR_CONFIG_FILE) != NO_ERROR) {
2317        if (loadAudioPolicyConfig(AUDIO_POLICY_CONFIG_FILE) != NO_ERROR) {
2318            ALOGE("could not load audio policy configuration file, setting defaults");
2319            defaultAudioPolicyConfig();
2320        }
2321    }
2322    // mAvailableOutputDevices and mAvailableInputDevices now contain all attached devices
2323
2324    // must be done after reading the policy
2325    initializeVolumeCurves();
2326
2327    // open all output streams needed to access attached devices
2328    audio_devices_t outputDeviceTypes = mAvailableOutputDevices.types();
2329    audio_devices_t inputDeviceTypes = mAvailableInputDevices.types() & ~AUDIO_DEVICE_BIT_IN;
2330    for (size_t i = 0; i < mHwModules.size(); i++) {
2331        mHwModules[i]->mHandle = mpClientInterface->loadHwModule(mHwModules[i]->mName);
2332        if (mHwModules[i]->mHandle == 0) {
2333            ALOGW("could not open HW module %s", mHwModules[i]->mName);
2334            continue;
2335        }
2336        // open all output streams needed to access attached devices
2337        // except for direct output streams that are only opened when they are actually
2338        // required by an app.
2339        // This also validates mAvailableOutputDevices list
2340        for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2341        {
2342            const sp<IOProfile> outProfile = mHwModules[i]->mOutputProfiles[j];
2343
2344            if (outProfile->mSupportedDevices.isEmpty()) {
2345                ALOGW("Output profile contains no device on module %s", mHwModules[i]->mName);
2346                continue;
2347            }
2348
2349            audio_devices_t profileType = outProfile->mSupportedDevices.types();
2350            if ((profileType & mDefaultOutputDevice->mDeviceType) != AUDIO_DEVICE_NONE) {
2351                profileType = mDefaultOutputDevice->mDeviceType;
2352            } else {
2353                profileType = outProfile->mSupportedDevices[0]->mDeviceType;
2354            }
2355            if ((profileType & outputDeviceTypes) &&
2356                    ((outProfile->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0)) {
2357                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(outProfile);
2358
2359                outputDesc->mDevice = profileType;
2360                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2361                config.sample_rate = outputDesc->mSamplingRate;
2362                config.channel_mask = outputDesc->mChannelMask;
2363                config.format = outputDesc->mFormat;
2364                audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2365                status_t status = mpClientInterface->openOutput(outProfile->mModule->mHandle,
2366                                                                &output,
2367                                                                &config,
2368                                                                &outputDesc->mDevice,
2369                                                                String8(""),
2370                                                                &outputDesc->mLatency,
2371                                                                outputDesc->mFlags);
2372
2373                if (status != NO_ERROR) {
2374                    ALOGW("Cannot open output stream for device %08x on hw module %s",
2375                          outputDesc->mDevice,
2376                          mHwModules[i]->mName);
2377                } else {
2378                    outputDesc->mSamplingRate = config.sample_rate;
2379                    outputDesc->mChannelMask = config.channel_mask;
2380                    outputDesc->mFormat = config.format;
2381
2382                    for (size_t k = 0; k  < outProfile->mSupportedDevices.size(); k++) {
2383                        audio_devices_t type = outProfile->mSupportedDevices[k]->mDeviceType;
2384                        ssize_t index =
2385                                mAvailableOutputDevices.indexOf(outProfile->mSupportedDevices[k]);
2386                        // give a valid ID to an attached device once confirmed it is reachable
2387                        if ((index >= 0) && (mAvailableOutputDevices[index]->mId == 0)) {
2388                            mAvailableOutputDevices[index]->mId = nextUniqueId();
2389                            mAvailableOutputDevices[index]->mModule = mHwModules[i];
2390                        }
2391                    }
2392                    if (mPrimaryOutput == 0 &&
2393                            outProfile->mFlags & AUDIO_OUTPUT_FLAG_PRIMARY) {
2394                        mPrimaryOutput = output;
2395                    }
2396                    addOutput(output, outputDesc);
2397                    setOutputDevice(output,
2398                                    outputDesc->mDevice,
2399                                    true);
2400                }
2401            }
2402        }
2403        // open input streams needed to access attached devices to validate
2404        // mAvailableInputDevices list
2405        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
2406        {
2407            const sp<IOProfile> inProfile = mHwModules[i]->mInputProfiles[j];
2408
2409            if (inProfile->mSupportedDevices.isEmpty()) {
2410                ALOGW("Input profile contains no device on module %s", mHwModules[i]->mName);
2411                continue;
2412            }
2413
2414            audio_devices_t profileType = inProfile->mSupportedDevices[0]->mDeviceType;
2415            if (profileType & inputDeviceTypes) {
2416                sp<AudioInputDescriptor> inputDesc = new AudioInputDescriptor(inProfile);
2417
2418                inputDesc->mInputSource = AUDIO_SOURCE_MIC;
2419                inputDesc->mDevice = profileType;
2420
2421                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2422                config.sample_rate = inputDesc->mSamplingRate;
2423                config.channel_mask = inputDesc->mChannelMask;
2424                config.format = inputDesc->mFormat;
2425                audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
2426                status_t status = mpClientInterface->openInput(inProfile->mModule->mHandle,
2427                                                               &input,
2428                                                               &config,
2429                                                               &inputDesc->mDevice,
2430                                                               String8(""),
2431                                                               AUDIO_SOURCE_MIC,
2432                                                               AUDIO_INPUT_FLAG_NONE);
2433
2434                if (status == NO_ERROR) {
2435                    for (size_t k = 0; k  < inProfile->mSupportedDevices.size(); k++) {
2436                        audio_devices_t type = inProfile->mSupportedDevices[k]->mDeviceType;
2437                        ssize_t index =
2438                                mAvailableInputDevices.indexOf(inProfile->mSupportedDevices[k]);
2439                        // give a valid ID to an attached device once confirmed it is reachable
2440                        if ((index >= 0) && (mAvailableInputDevices[index]->mId == 0)) {
2441                            mAvailableInputDevices[index]->mId = nextUniqueId();
2442                            mAvailableInputDevices[index]->mModule = mHwModules[i];
2443                        }
2444                    }
2445                    mpClientInterface->closeInput(input);
2446                } else {
2447                    ALOGW("Cannot open input stream for device %08x on hw module %s",
2448                          inputDesc->mDevice,
2449                          mHwModules[i]->mName);
2450                }
2451            }
2452        }
2453    }
2454    // make sure all attached devices have been allocated a unique ID
2455    for (size_t i = 0; i  < mAvailableOutputDevices.size();) {
2456        if (mAvailableOutputDevices[i]->mId == 0) {
2457            ALOGW("Input device %08x unreachable", mAvailableOutputDevices[i]->mDeviceType);
2458            mAvailableOutputDevices.remove(mAvailableOutputDevices[i]);
2459            continue;
2460        }
2461        i++;
2462    }
2463    for (size_t i = 0; i  < mAvailableInputDevices.size();) {
2464        if (mAvailableInputDevices[i]->mId == 0) {
2465            ALOGW("Input device %08x unreachable", mAvailableInputDevices[i]->mDeviceType);
2466            mAvailableInputDevices.remove(mAvailableInputDevices[i]);
2467            continue;
2468        }
2469        i++;
2470    }
2471    // make sure default device is reachable
2472    if (mAvailableOutputDevices.indexOf(mDefaultOutputDevice) < 0) {
2473        ALOGE("Default device %08x is unreachable", mDefaultOutputDevice->mDeviceType);
2474    }
2475
2476    ALOGE_IF((mPrimaryOutput == 0), "Failed to open primary output");
2477
2478    updateDevicesAndOutputs();
2479
2480#ifdef AUDIO_POLICY_TEST
2481    if (mPrimaryOutput != 0) {
2482        AudioParameter outputCmd = AudioParameter();
2483        outputCmd.addInt(String8("set_id"), 0);
2484        mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2485
2486        mTestDevice = AUDIO_DEVICE_OUT_SPEAKER;
2487        mTestSamplingRate = 44100;
2488        mTestFormat = AUDIO_FORMAT_PCM_16_BIT;
2489        mTestChannels =  AUDIO_CHANNEL_OUT_STEREO;
2490        mTestLatencyMs = 0;
2491        mCurOutput = 0;
2492        mDirectOutput = false;
2493        for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2494            mTestOutputs[i] = 0;
2495        }
2496
2497        const size_t SIZE = 256;
2498        char buffer[SIZE];
2499        snprintf(buffer, SIZE, "AudioPolicyManagerTest");
2500        run(buffer, ANDROID_PRIORITY_AUDIO);
2501    }
2502#endif //AUDIO_POLICY_TEST
2503}
2504
2505AudioPolicyManager::~AudioPolicyManager()
2506{
2507#ifdef AUDIO_POLICY_TEST
2508    exit();
2509#endif //AUDIO_POLICY_TEST
2510   for (size_t i = 0; i < mOutputs.size(); i++) {
2511        mpClientInterface->closeOutput(mOutputs.keyAt(i));
2512   }
2513   for (size_t i = 0; i < mInputs.size(); i++) {
2514        mpClientInterface->closeInput(mInputs.keyAt(i));
2515   }
2516   mAvailableOutputDevices.clear();
2517   mAvailableInputDevices.clear();
2518   mOutputs.clear();
2519   mInputs.clear();
2520   mHwModules.clear();
2521}
2522
2523status_t AudioPolicyManager::initCheck()
2524{
2525    return (mPrimaryOutput == 0) ? NO_INIT : NO_ERROR;
2526}
2527
2528#ifdef AUDIO_POLICY_TEST
2529bool AudioPolicyManager::threadLoop()
2530{
2531    ALOGV("entering threadLoop()");
2532    while (!exitPending())
2533    {
2534        String8 command;
2535        int valueInt;
2536        String8 value;
2537
2538        Mutex::Autolock _l(mLock);
2539        mWaitWorkCV.waitRelative(mLock, milliseconds(50));
2540
2541        command = mpClientInterface->getParameters(0, String8("test_cmd_policy"));
2542        AudioParameter param = AudioParameter(command);
2543
2544        if (param.getInt(String8("test_cmd_policy"), valueInt) == NO_ERROR &&
2545            valueInt != 0) {
2546            ALOGV("Test command %s received", command.string());
2547            String8 target;
2548            if (param.get(String8("target"), target) != NO_ERROR) {
2549                target = "Manager";
2550            }
2551            if (param.getInt(String8("test_cmd_policy_output"), valueInt) == NO_ERROR) {
2552                param.remove(String8("test_cmd_policy_output"));
2553                mCurOutput = valueInt;
2554            }
2555            if (param.get(String8("test_cmd_policy_direct"), value) == NO_ERROR) {
2556                param.remove(String8("test_cmd_policy_direct"));
2557                if (value == "false") {
2558                    mDirectOutput = false;
2559                } else if (value == "true") {
2560                    mDirectOutput = true;
2561                }
2562            }
2563            if (param.getInt(String8("test_cmd_policy_input"), valueInt) == NO_ERROR) {
2564                param.remove(String8("test_cmd_policy_input"));
2565                mTestInput = valueInt;
2566            }
2567
2568            if (param.get(String8("test_cmd_policy_format"), value) == NO_ERROR) {
2569                param.remove(String8("test_cmd_policy_format"));
2570                int format = AUDIO_FORMAT_INVALID;
2571                if (value == "PCM 16 bits") {
2572                    format = AUDIO_FORMAT_PCM_16_BIT;
2573                } else if (value == "PCM 8 bits") {
2574                    format = AUDIO_FORMAT_PCM_8_BIT;
2575                } else if (value == "Compressed MP3") {
2576                    format = AUDIO_FORMAT_MP3;
2577                }
2578                if (format != AUDIO_FORMAT_INVALID) {
2579                    if (target == "Manager") {
2580                        mTestFormat = format;
2581                    } else if (mTestOutputs[mCurOutput] != 0) {
2582                        AudioParameter outputParam = AudioParameter();
2583                        outputParam.addInt(String8("format"), format);
2584                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2585                    }
2586                }
2587            }
2588            if (param.get(String8("test_cmd_policy_channels"), value) == NO_ERROR) {
2589                param.remove(String8("test_cmd_policy_channels"));
2590                int channels = 0;
2591
2592                if (value == "Channels Stereo") {
2593                    channels =  AUDIO_CHANNEL_OUT_STEREO;
2594                } else if (value == "Channels Mono") {
2595                    channels =  AUDIO_CHANNEL_OUT_MONO;
2596                }
2597                if (channels != 0) {
2598                    if (target == "Manager") {
2599                        mTestChannels = channels;
2600                    } else if (mTestOutputs[mCurOutput] != 0) {
2601                        AudioParameter outputParam = AudioParameter();
2602                        outputParam.addInt(String8("channels"), channels);
2603                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2604                    }
2605                }
2606            }
2607            if (param.getInt(String8("test_cmd_policy_sampleRate"), valueInt) == NO_ERROR) {
2608                param.remove(String8("test_cmd_policy_sampleRate"));
2609                if (valueInt >= 0 && valueInt <= 96000) {
2610                    int samplingRate = valueInt;
2611                    if (target == "Manager") {
2612                        mTestSamplingRate = samplingRate;
2613                    } else if (mTestOutputs[mCurOutput] != 0) {
2614                        AudioParameter outputParam = AudioParameter();
2615                        outputParam.addInt(String8("sampling_rate"), samplingRate);
2616                        mpClientInterface->setParameters(mTestOutputs[mCurOutput], outputParam.toString());
2617                    }
2618                }
2619            }
2620
2621            if (param.get(String8("test_cmd_policy_reopen"), value) == NO_ERROR) {
2622                param.remove(String8("test_cmd_policy_reopen"));
2623
2624                sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
2625                mpClientInterface->closeOutput(mPrimaryOutput);
2626
2627                audio_module_handle_t moduleHandle = outputDesc->mModule->mHandle;
2628
2629                mOutputs.removeItem(mPrimaryOutput);
2630
2631                sp<AudioOutputDescriptor> outputDesc = new AudioOutputDescriptor(NULL);
2632                outputDesc->mDevice = AUDIO_DEVICE_OUT_SPEAKER;
2633                audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2634                config.sample_rate = outputDesc->mSamplingRate;
2635                config.channel_mask = outputDesc->mChannelMask;
2636                config.format = outputDesc->mFormat;
2637                status_t status = mpClientInterface->openOutput(moduleHandle,
2638                                                                &mPrimaryOutput,
2639                                                                &config,
2640                                                                &outputDesc->mDevice,
2641                                                                String8(""),
2642                                                                &outputDesc->mLatency,
2643                                                                outputDesc->mFlags);
2644                if (status != NO_ERROR) {
2645                    ALOGE("Failed to reopen hardware output stream, "
2646                        "samplingRate: %d, format %d, channels %d",
2647                        outputDesc->mSamplingRate, outputDesc->mFormat, outputDesc->mChannelMask);
2648                } else {
2649                    outputDesc->mSamplingRate = config.sample_rate;
2650                    outputDesc->mChannelMask = config.channel_mask;
2651                    outputDesc->mFormat = config.format;
2652                    AudioParameter outputCmd = AudioParameter();
2653                    outputCmd.addInt(String8("set_id"), 0);
2654                    mpClientInterface->setParameters(mPrimaryOutput, outputCmd.toString());
2655                    addOutput(mPrimaryOutput, outputDesc);
2656                }
2657            }
2658
2659
2660            mpClientInterface->setParameters(0, String8("test_cmd_policy="));
2661        }
2662    }
2663    return false;
2664}
2665
2666void AudioPolicyManager::exit()
2667{
2668    {
2669        AutoMutex _l(mLock);
2670        requestExit();
2671        mWaitWorkCV.signal();
2672    }
2673    requestExitAndWait();
2674}
2675
2676int AudioPolicyManager::testOutputIndex(audio_io_handle_t output)
2677{
2678    for (int i = 0; i < NUM_TEST_OUTPUTS; i++) {
2679        if (output == mTestOutputs[i]) return i;
2680    }
2681    return 0;
2682}
2683#endif //AUDIO_POLICY_TEST
2684
2685// ---
2686
2687void AudioPolicyManager::addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc)
2688{
2689    outputDesc->mIoHandle = output;
2690    outputDesc->mId = nextUniqueId();
2691    mOutputs.add(output, outputDesc);
2692    nextAudioPortGeneration();
2693}
2694
2695void AudioPolicyManager::addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc)
2696{
2697    inputDesc->mIoHandle = input;
2698    inputDesc->mId = nextUniqueId();
2699    mInputs.add(input, inputDesc);
2700    nextAudioPortGeneration();
2701}
2702
2703void AudioPolicyManager::findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/,
2704        const String8 address /*in*/,
2705        SortedVector<audio_io_handle_t>& outputs /*out*/) {
2706    // look for a match on the given address on the addresses of the outputs:
2707    // find the address by finding the patch that maps to this output
2708    ssize_t patchIdx = mAudioPatches.indexOfKey(desc->mPatchHandle);
2709    //ALOGV("    inspecting output %d (patch %d) for supported device=0x%x",
2710    //        outputIdx, patchIdx,  desc->mProfile->mSupportedDevices.types());
2711    if (patchIdx >= 0) {
2712        const sp<AudioPatch> patchDesc = mAudioPatches.valueAt(patchIdx);
2713        const int numSinks = patchDesc->mPatch.num_sinks;
2714        for (ssize_t j=0; j < numSinks; j++) {
2715            if (patchDesc->mPatch.sinks[j].type == AUDIO_PORT_TYPE_DEVICE) {
2716                const char* patchAddr =
2717                        patchDesc->mPatch.sinks[j].ext.device.address;
2718                if (strncmp(patchAddr,
2719                        address.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN) == 0) {
2720                    ALOGV("checkOutputsForDevice(): adding opened output %d on same address %s",
2721                            desc->mIoHandle,  patchDesc->mPatch.sinks[j].ext.device.address);
2722                    outputs.add(desc->mIoHandle);
2723                    break;
2724                }
2725            }
2726        }
2727    }
2728}
2729
2730status_t AudioPolicyManager::checkOutputsForDevice(audio_devices_t device,
2731                                                       audio_policy_dev_state_t state,
2732                                                       SortedVector<audio_io_handle_t>& outputs,
2733                                                       const String8 address)
2734{
2735    sp<AudioOutputDescriptor> desc;
2736
2737    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
2738        // first list already open outputs that can be routed to this device
2739        for (size_t i = 0; i < mOutputs.size(); i++) {
2740            desc = mOutputs.valueAt(i);
2741            if (!desc->isDuplicated() && (desc->mProfile->mSupportedDevices.types() & device)) {
2742                if (!deviceDistinguishesOnAddress(device)) {
2743                    ALOGV("checkOutputsForDevice(): adding opened output %d", mOutputs.keyAt(i));
2744                    outputs.add(mOutputs.keyAt(i));
2745                } else {
2746                    ALOGV("  checking address match due to device 0x%x", device);
2747                    findIoHandlesByAddress(desc, address, outputs);
2748                }
2749            }
2750        }
2751        // then look for output profiles that can be routed to this device
2752        SortedVector< sp<IOProfile> > profiles;
2753        for (size_t i = 0; i < mHwModules.size(); i++)
2754        {
2755            if (mHwModules[i]->mHandle == 0) {
2756                continue;
2757            }
2758            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2759            {
2760                if (mHwModules[i]->mOutputProfiles[j]->mSupportedDevices.types() & device) {
2761                    ALOGV("checkOutputsForDevice(): adding profile %zu from module %zu", j, i);
2762                    profiles.add(mHwModules[i]->mOutputProfiles[j]);
2763                }
2764            }
2765        }
2766
2767        ALOGV("  found %d profiles, %d outputs", profiles.size(), outputs.size());
2768
2769        if (profiles.isEmpty() && outputs.isEmpty()) {
2770            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2771            return BAD_VALUE;
2772        }
2773
2774        // open outputs for matching profiles if needed. Direct outputs are also opened to
2775        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
2776        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
2777            sp<IOProfile> profile = profiles[profile_index];
2778
2779            // nothing to do if one output is already opened for this profile
2780            size_t j;
2781            for (j = 0; j < outputs.size(); j++) {
2782                desc = mOutputs.valueFor(outputs.itemAt(j));
2783                if (!desc->isDuplicated() && desc->mProfile == profile) {
2784                    break;
2785                }
2786            }
2787            if (j != outputs.size()) {
2788                continue;
2789            }
2790
2791            ALOGV("opening output for device %08x with params %s profile %p",
2792                                                      device, address.string(), profile.get());
2793            desc = new AudioOutputDescriptor(profile);
2794            desc->mDevice = device;
2795            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
2796            config.sample_rate = desc->mSamplingRate;
2797            config.channel_mask = desc->mChannelMask;
2798            config.format = desc->mFormat;
2799            config.offload_info.sample_rate = desc->mSamplingRate;
2800            config.offload_info.channel_mask = desc->mChannelMask;
2801            config.offload_info.format = desc->mFormat;
2802            audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
2803            status_t status = mpClientInterface->openOutput(profile->mModule->mHandle,
2804                                                            &output,
2805                                                            &config,
2806                                                            &desc->mDevice,
2807                                                            address,
2808                                                            &desc->mLatency,
2809                                                            desc->mFlags);
2810            if (status == NO_ERROR) {
2811                desc->mSamplingRate = config.sample_rate;
2812                desc->mChannelMask = config.channel_mask;
2813                desc->mFormat = config.format;
2814
2815                // Here is where the out_set_parameters() for card & device gets called
2816                if (!address.isEmpty()) {
2817                    char *param = audio_device_address_to_parameter(device, address);
2818                    mpClientInterface->setParameters(output, String8(param));
2819                    free(param);
2820                }
2821
2822                // Here is where we step through and resolve any "dynamic" fields
2823                String8 reply;
2824                char *value;
2825                if (profile->mSamplingRates[0] == 0) {
2826                    reply = mpClientInterface->getParameters(output,
2827                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
2828                    ALOGV("checkOutputsForDevice() supported sampling rates %s",
2829                              reply.string());
2830                    value = strpbrk((char *)reply.string(), "=");
2831                    if (value != NULL) {
2832                        profile->loadSamplingRates(value + 1);
2833                    }
2834                }
2835                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2836                    reply = mpClientInterface->getParameters(output,
2837                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
2838                    ALOGV("checkOutputsForDevice() supported formats %s",
2839                              reply.string());
2840                    value = strpbrk((char *)reply.string(), "=");
2841                    if (value != NULL) {
2842                        profile->loadFormats(value + 1);
2843                    }
2844                }
2845                if (profile->mChannelMasks[0] == 0) {
2846                    reply = mpClientInterface->getParameters(output,
2847                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
2848                    ALOGV("checkOutputsForDevice() supported channel masks %s",
2849                              reply.string());
2850                    value = strpbrk((char *)reply.string(), "=");
2851                    if (value != NULL) {
2852                        profile->loadOutChannels(value + 1);
2853                    }
2854                }
2855                if (((profile->mSamplingRates[0] == 0) &&
2856                         (profile->mSamplingRates.size() < 2)) ||
2857                     ((profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) &&
2858                         (profile->mFormats.size() < 2)) ||
2859                     ((profile->mChannelMasks[0] == 0) &&
2860                         (profile->mChannelMasks.size() < 2))) {
2861                    ALOGW("checkOutputsForDevice() missing param");
2862                    mpClientInterface->closeOutput(output);
2863                    output = AUDIO_IO_HANDLE_NONE;
2864                } else if (profile->mSamplingRates[0] == 0 || profile->mFormats[0] == 0 ||
2865                            profile->mChannelMasks[0] == 0) {
2866                    mpClientInterface->closeOutput(output);
2867                    config.sample_rate = profile->pickSamplingRate();
2868                    config.channel_mask = profile->pickChannelMask();
2869                    config.format = profile->pickFormat();
2870                    config.offload_info.sample_rate = config.sample_rate;
2871                    config.offload_info.channel_mask = config.channel_mask;
2872                    config.offload_info.format = config.format;
2873                    status = mpClientInterface->openOutput(profile->mModule->mHandle,
2874                                                           &output,
2875                                                           &config,
2876                                                           &desc->mDevice,
2877                                                           address,
2878                                                           &desc->mLatency,
2879                                                           desc->mFlags);
2880                    if (status == NO_ERROR) {
2881                        desc->mSamplingRate = config.sample_rate;
2882                        desc->mChannelMask = config.channel_mask;
2883                        desc->mFormat = config.format;
2884                    } else {
2885                        output = AUDIO_IO_HANDLE_NONE;
2886                    }
2887                }
2888
2889                if (output != AUDIO_IO_HANDLE_NONE) {
2890                    addOutput(output, desc);
2891                    if ((desc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
2892                        audio_io_handle_t duplicatedOutput = AUDIO_IO_HANDLE_NONE;
2893
2894                        // set initial stream volume for device
2895                        applyStreamVolumes(output, device, 0, true);
2896
2897                        //TODO: configure audio effect output stage here
2898
2899                        // open a duplicating output thread for the new output and the primary output
2900                        duplicatedOutput = mpClientInterface->openDuplicateOutput(output,
2901                                                                                  mPrimaryOutput);
2902                        if (duplicatedOutput != AUDIO_IO_HANDLE_NONE) {
2903                            // add duplicated output descriptor
2904                            sp<AudioOutputDescriptor> dupOutputDesc =
2905                                    new AudioOutputDescriptor(NULL);
2906                            dupOutputDesc->mOutput1 = mOutputs.valueFor(mPrimaryOutput);
2907                            dupOutputDesc->mOutput2 = mOutputs.valueFor(output);
2908                            dupOutputDesc->mSamplingRate = desc->mSamplingRate;
2909                            dupOutputDesc->mFormat = desc->mFormat;
2910                            dupOutputDesc->mChannelMask = desc->mChannelMask;
2911                            dupOutputDesc->mLatency = desc->mLatency;
2912                            addOutput(duplicatedOutput, dupOutputDesc);
2913                            applyStreamVolumes(duplicatedOutput, device, 0, true);
2914                        } else {
2915                            ALOGW("checkOutputsForDevice() could not open dup output for %d and %d",
2916                                    mPrimaryOutput, output);
2917                            mpClientInterface->closeOutput(output);
2918                            mOutputs.removeItem(output);
2919                            nextAudioPortGeneration();
2920                            output = AUDIO_IO_HANDLE_NONE;
2921                        }
2922                    }
2923                }
2924            } else {
2925                output = AUDIO_IO_HANDLE_NONE;
2926            }
2927            if (output == AUDIO_IO_HANDLE_NONE) {
2928                ALOGW("checkOutputsForDevice() could not open output for device %x", device);
2929                profiles.removeAt(profile_index);
2930                profile_index--;
2931            } else {
2932                outputs.add(output);
2933                if (deviceDistinguishesOnAddress(device)) {
2934                    ALOGV("checkOutputsForDevice(): setOutputDevice(dev=0x%x, addr=%s)",
2935                            device, address.string());
2936                    setOutputDevice(output, device, true/*force*/, 0/*delay*/,
2937                            NULL/*patch handle*/, address.string());
2938                }
2939                ALOGV("checkOutputsForDevice(): adding output %d", output);
2940            }
2941        }
2942
2943        if (profiles.isEmpty()) {
2944            ALOGW("checkOutputsForDevice(): No output available for device %04x", device);
2945            return BAD_VALUE;
2946        }
2947    } else { // Disconnect
2948        // check if one opened output is not needed any more after disconnecting one device
2949        for (size_t i = 0; i < mOutputs.size(); i++) {
2950            desc = mOutputs.valueAt(i);
2951            if (!desc->isDuplicated()) {
2952                if  (!(desc->mProfile->mSupportedDevices.types()
2953                        & mAvailableOutputDevices.types())) {
2954                    ALOGV("checkOutputsForDevice(): disconnecting adding output %d",
2955                            mOutputs.keyAt(i));
2956                    outputs.add(mOutputs.keyAt(i));
2957                } else if (deviceDistinguishesOnAddress(device) &&
2958                        // exact match on device
2959                        (desc->mProfile->mSupportedDevices.types() == device)) {
2960                    findIoHandlesByAddress(desc, address, outputs);
2961                }
2962            }
2963        }
2964        // Clear any profiles associated with the disconnected device.
2965        for (size_t i = 0; i < mHwModules.size(); i++)
2966        {
2967            if (mHwModules[i]->mHandle == 0) {
2968                continue;
2969            }
2970            for (size_t j = 0; j < mHwModules[i]->mOutputProfiles.size(); j++)
2971            {
2972                sp<IOProfile> profile = mHwModules[i]->mOutputProfiles[j];
2973                if (profile->mSupportedDevices.types() & device) {
2974                    ALOGV("checkOutputsForDevice(): "
2975                            "clearing direct output profile %zu on module %zu", j, i);
2976                    if (profile->mSamplingRates[0] == 0) {
2977                        profile->mSamplingRates.clear();
2978                        profile->mSamplingRates.add(0);
2979                    }
2980                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
2981                        profile->mFormats.clear();
2982                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
2983                    }
2984                    if (profile->mChannelMasks[0] == 0) {
2985                        profile->mChannelMasks.clear();
2986                        profile->mChannelMasks.add(0);
2987                    }
2988                }
2989            }
2990        }
2991    }
2992    return NO_ERROR;
2993}
2994
2995status_t AudioPolicyManager::checkInputsForDevice(audio_devices_t device,
2996                                                      audio_policy_dev_state_t state,
2997                                                      SortedVector<audio_io_handle_t>& inputs,
2998                                                      const String8 address)
2999{
3000    sp<AudioInputDescriptor> desc;
3001    if (state == AUDIO_POLICY_DEVICE_STATE_AVAILABLE) {
3002        // first list already open inputs that can be routed to this device
3003        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3004            desc = mInputs.valueAt(input_index);
3005            if (desc->mProfile->mSupportedDevices.types() & (device & ~AUDIO_DEVICE_BIT_IN)) {
3006                ALOGV("checkInputsForDevice(): adding opened input %d", mInputs.keyAt(input_index));
3007               inputs.add(mInputs.keyAt(input_index));
3008            }
3009        }
3010
3011        // then look for input profiles that can be routed to this device
3012        SortedVector< sp<IOProfile> > profiles;
3013        for (size_t module_idx = 0; module_idx < mHwModules.size(); module_idx++)
3014        {
3015            if (mHwModules[module_idx]->mHandle == 0) {
3016                continue;
3017            }
3018            for (size_t profile_index = 0;
3019                 profile_index < mHwModules[module_idx]->mInputProfiles.size();
3020                 profile_index++)
3021            {
3022                if (mHwModules[module_idx]->mInputProfiles[profile_index]->mSupportedDevices.types()
3023                        & (device & ~AUDIO_DEVICE_BIT_IN)) {
3024                    ALOGV("checkInputsForDevice(): adding profile %zu from module %zu",
3025                          profile_index, module_idx);
3026                    profiles.add(mHwModules[module_idx]->mInputProfiles[profile_index]);
3027                }
3028            }
3029        }
3030
3031        if (profiles.isEmpty() && inputs.isEmpty()) {
3032            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3033            return BAD_VALUE;
3034        }
3035
3036        // open inputs for matching profiles if needed. Direct inputs are also opened to
3037        // query for dynamic parameters and will be closed later by setDeviceConnectionState()
3038        for (ssize_t profile_index = 0; profile_index < (ssize_t)profiles.size(); profile_index++) {
3039
3040            sp<IOProfile> profile = profiles[profile_index];
3041            // nothing to do if one input is already opened for this profile
3042            size_t input_index;
3043            for (input_index = 0; input_index < mInputs.size(); input_index++) {
3044                desc = mInputs.valueAt(input_index);
3045                if (desc->mProfile == profile) {
3046                    break;
3047                }
3048            }
3049            if (input_index != mInputs.size()) {
3050                continue;
3051            }
3052
3053            ALOGV("opening input for device 0x%X with params %s", device, address.string());
3054            desc = new AudioInputDescriptor(profile);
3055            desc->mDevice = device;
3056            audio_config_t config = AUDIO_CONFIG_INITIALIZER;
3057            config.sample_rate = desc->mSamplingRate;
3058            config.channel_mask = desc->mChannelMask;
3059            config.format = desc->mFormat;
3060            audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
3061            status_t status = mpClientInterface->openInput(profile->mModule->mHandle,
3062                                                           &input,
3063                                                           &config,
3064                                                           &desc->mDevice,
3065                                                           address,
3066                                                           AUDIO_SOURCE_MIC,
3067                                                           AUDIO_INPUT_FLAG_NONE /*FIXME*/);
3068
3069            if (status == NO_ERROR) {
3070                desc->mSamplingRate = config.sample_rate;
3071                desc->mChannelMask = config.channel_mask;
3072                desc->mFormat = config.format;
3073
3074                if (!address.isEmpty()) {
3075                    char *param = audio_device_address_to_parameter(device, address);
3076                    mpClientInterface->setParameters(input, String8(param));
3077                    free(param);
3078                }
3079
3080                // Here is where we step through and resolve any "dynamic" fields
3081                String8 reply;
3082                char *value;
3083                if (profile->mSamplingRates[0] == 0) {
3084                    reply = mpClientInterface->getParameters(input,
3085                                            String8(AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES));
3086                    ALOGV("checkInputsForDevice() direct input sup sampling rates %s",
3087                              reply.string());
3088                    value = strpbrk((char *)reply.string(), "=");
3089                    if (value != NULL) {
3090                        profile->loadSamplingRates(value + 1);
3091                    }
3092                }
3093                if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3094                    reply = mpClientInterface->getParameters(input,
3095                                                   String8(AUDIO_PARAMETER_STREAM_SUP_FORMATS));
3096                    ALOGV("checkInputsForDevice() direct input sup formats %s", reply.string());
3097                    value = strpbrk((char *)reply.string(), "=");
3098                    if (value != NULL) {
3099                        profile->loadFormats(value + 1);
3100                    }
3101                }
3102                if (profile->mChannelMasks[0] == 0) {
3103                    reply = mpClientInterface->getParameters(input,
3104                                                  String8(AUDIO_PARAMETER_STREAM_SUP_CHANNELS));
3105                    ALOGV("checkInputsForDevice() direct input sup channel masks %s",
3106                              reply.string());
3107                    value = strpbrk((char *)reply.string(), "=");
3108                    if (value != NULL) {
3109                        profile->loadInChannels(value + 1);
3110                    }
3111                }
3112                if (((profile->mSamplingRates[0] == 0) && (profile->mSamplingRates.size() < 2)) ||
3113                     ((profile->mFormats[0] == 0) && (profile->mFormats.size() < 2)) ||
3114                     ((profile->mChannelMasks[0] == 0) && (profile->mChannelMasks.size() < 2))) {
3115                    ALOGW("checkInputsForDevice() direct input missing param");
3116                    mpClientInterface->closeInput(input);
3117                    input = AUDIO_IO_HANDLE_NONE;
3118                }
3119
3120                if (input != 0) {
3121                    addInput(input, desc);
3122                }
3123            } // endif input != 0
3124
3125            if (input == AUDIO_IO_HANDLE_NONE) {
3126                ALOGW("checkInputsForDevice() could not open input for device 0x%X", device);
3127                profiles.removeAt(profile_index);
3128                profile_index--;
3129            } else {
3130                inputs.add(input);
3131                ALOGV("checkInputsForDevice(): adding input %d", input);
3132            }
3133        } // end scan profiles
3134
3135        if (profiles.isEmpty()) {
3136            ALOGW("checkInputsForDevice(): No input available for device 0x%X", device);
3137            return BAD_VALUE;
3138        }
3139    } else {
3140        // Disconnect
3141        // check if one opened input is not needed any more after disconnecting one device
3142        for (size_t input_index = 0; input_index < mInputs.size(); input_index++) {
3143            desc = mInputs.valueAt(input_index);
3144            if (!(desc->mProfile->mSupportedDevices.types() & mAvailableInputDevices.types())) {
3145                ALOGV("checkInputsForDevice(): disconnecting adding input %d",
3146                      mInputs.keyAt(input_index));
3147                inputs.add(mInputs.keyAt(input_index));
3148            }
3149        }
3150        // Clear any profiles associated with the disconnected device.
3151        for (size_t module_index = 0; module_index < mHwModules.size(); module_index++) {
3152            if (mHwModules[module_index]->mHandle == 0) {
3153                continue;
3154            }
3155            for (size_t profile_index = 0;
3156                 profile_index < mHwModules[module_index]->mInputProfiles.size();
3157                 profile_index++) {
3158                sp<IOProfile> profile = mHwModules[module_index]->mInputProfiles[profile_index];
3159                if (profile->mSupportedDevices.types() & device) {
3160                    ALOGV("checkInputsForDevice(): clearing direct input profile %zu on module %zu",
3161                          profile_index, module_index);
3162                    if (profile->mSamplingRates[0] == 0) {
3163                        profile->mSamplingRates.clear();
3164                        profile->mSamplingRates.add(0);
3165                    }
3166                    if (profile->mFormats[0] == AUDIO_FORMAT_DEFAULT) {
3167                        profile->mFormats.clear();
3168                        profile->mFormats.add(AUDIO_FORMAT_DEFAULT);
3169                    }
3170                    if (profile->mChannelMasks[0] == 0) {
3171                        profile->mChannelMasks.clear();
3172                        profile->mChannelMasks.add(0);
3173                    }
3174                }
3175            }
3176        }
3177    } // end disconnect
3178
3179    return NO_ERROR;
3180}
3181
3182
3183void AudioPolicyManager::closeOutput(audio_io_handle_t output)
3184{
3185    ALOGV("closeOutput(%d)", output);
3186
3187    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3188    if (outputDesc == NULL) {
3189        ALOGW("closeOutput() unknown output %d", output);
3190        return;
3191    }
3192
3193    // look for duplicated outputs connected to the output being removed.
3194    for (size_t i = 0; i < mOutputs.size(); i++) {
3195        sp<AudioOutputDescriptor> dupOutputDesc = mOutputs.valueAt(i);
3196        if (dupOutputDesc->isDuplicated() &&
3197                (dupOutputDesc->mOutput1 == outputDesc ||
3198                dupOutputDesc->mOutput2 == outputDesc)) {
3199            sp<AudioOutputDescriptor> outputDesc2;
3200            if (dupOutputDesc->mOutput1 == outputDesc) {
3201                outputDesc2 = dupOutputDesc->mOutput2;
3202            } else {
3203                outputDesc2 = dupOutputDesc->mOutput1;
3204            }
3205            // As all active tracks on duplicated output will be deleted,
3206            // and as they were also referenced on the other output, the reference
3207            // count for their stream type must be adjusted accordingly on
3208            // the other output.
3209            for (int j = 0; j < AUDIO_STREAM_CNT; j++) {
3210                int refCount = dupOutputDesc->mRefCount[j];
3211                outputDesc2->changeRefCount((audio_stream_type_t)j,-refCount);
3212            }
3213            audio_io_handle_t duplicatedOutput = mOutputs.keyAt(i);
3214            ALOGV("closeOutput() closing also duplicated output %d", duplicatedOutput);
3215
3216            mpClientInterface->closeOutput(duplicatedOutput);
3217            mOutputs.removeItem(duplicatedOutput);
3218        }
3219    }
3220
3221    AudioParameter param;
3222    param.add(String8("closing"), String8("true"));
3223    mpClientInterface->setParameters(output, param.toString());
3224
3225    mpClientInterface->closeOutput(output);
3226    mOutputs.removeItem(output);
3227    mPreviousOutputs = mOutputs;
3228    nextAudioPortGeneration();
3229}
3230
3231SortedVector<audio_io_handle_t> AudioPolicyManager::getOutputsForDevice(audio_devices_t device,
3232                        DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs)
3233{
3234    SortedVector<audio_io_handle_t> outputs;
3235
3236    ALOGVV("getOutputsForDevice() device %04x", device);
3237    for (size_t i = 0; i < openOutputs.size(); i++) {
3238        ALOGVV("output %d isDuplicated=%d device=%04x",
3239                i, openOutputs.valueAt(i)->isDuplicated(), openOutputs.valueAt(i)->supportedDevices());
3240        if ((device & openOutputs.valueAt(i)->supportedDevices()) == device) {
3241            ALOGVV("getOutputsForDevice() found output %d", openOutputs.keyAt(i));
3242            outputs.add(openOutputs.keyAt(i));
3243        }
3244    }
3245    return outputs;
3246}
3247
3248bool AudioPolicyManager::vectorsEqual(SortedVector<audio_io_handle_t>& outputs1,
3249                                   SortedVector<audio_io_handle_t>& outputs2)
3250{
3251    if (outputs1.size() != outputs2.size()) {
3252        return false;
3253    }
3254    for (size_t i = 0; i < outputs1.size(); i++) {
3255        if (outputs1[i] != outputs2[i]) {
3256            return false;
3257        }
3258    }
3259    return true;
3260}
3261
3262void AudioPolicyManager::checkOutputForStrategy(routing_strategy strategy)
3263{
3264    audio_devices_t oldDevice = getDeviceForStrategy(strategy, true /*fromCache*/);
3265    audio_devices_t newDevice = getDeviceForStrategy(strategy, false /*fromCache*/);
3266    SortedVector<audio_io_handle_t> srcOutputs = getOutputsForDevice(oldDevice, mPreviousOutputs);
3267    SortedVector<audio_io_handle_t> dstOutputs = getOutputsForDevice(newDevice, mOutputs);
3268
3269    if (!vectorsEqual(srcOutputs,dstOutputs)) {
3270        ALOGV("checkOutputForStrategy() strategy %d, moving from output %d to output %d",
3271              strategy, srcOutputs[0], dstOutputs[0]);
3272        // mute strategy while moving tracks from one output to another
3273        for (size_t i = 0; i < srcOutputs.size(); i++) {
3274            sp<AudioOutputDescriptor> desc = mOutputs.valueFor(srcOutputs[i]);
3275            if (desc->isStrategyActive(strategy)) {
3276                setStrategyMute(strategy, true, srcOutputs[i]);
3277                setStrategyMute(strategy, false, srcOutputs[i], MUTE_TIME_MS, newDevice);
3278            }
3279        }
3280
3281        // Move effects associated to this strategy from previous output to new output
3282        if (strategy == STRATEGY_MEDIA) {
3283            audio_io_handle_t fxOutput = selectOutputForEffects(dstOutputs);
3284            SortedVector<audio_io_handle_t> moved;
3285            for (size_t i = 0; i < mEffects.size(); i++) {
3286                sp<EffectDescriptor> effectDesc = mEffects.valueAt(i);
3287                if (effectDesc->mSession == AUDIO_SESSION_OUTPUT_MIX &&
3288                        effectDesc->mIo != fxOutput) {
3289                    if (moved.indexOf(effectDesc->mIo) < 0) {
3290                        ALOGV("checkOutputForStrategy() moving effect %d to output %d",
3291                              mEffects.keyAt(i), fxOutput);
3292                        mpClientInterface->moveEffects(AUDIO_SESSION_OUTPUT_MIX, effectDesc->mIo,
3293                                                       fxOutput);
3294                        moved.add(effectDesc->mIo);
3295                    }
3296                    effectDesc->mIo = fxOutput;
3297                }
3298            }
3299        }
3300        // Move tracks associated to this strategy from previous output to new output
3301        for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
3302            if (getStrategy((audio_stream_type_t)i) == strategy) {
3303                mpClientInterface->invalidateStream((audio_stream_type_t)i);
3304            }
3305        }
3306    }
3307}
3308
3309void AudioPolicyManager::checkOutputForAllStrategies()
3310{
3311    checkOutputForStrategy(STRATEGY_ENFORCED_AUDIBLE);
3312    checkOutputForStrategy(STRATEGY_PHONE);
3313    checkOutputForStrategy(STRATEGY_SONIFICATION);
3314    checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3315    checkOutputForStrategy(STRATEGY_MEDIA);
3316    checkOutputForStrategy(STRATEGY_DTMF);
3317}
3318
3319audio_io_handle_t AudioPolicyManager::getA2dpOutput()
3320{
3321    for (size_t i = 0; i < mOutputs.size(); i++) {
3322        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueAt(i);
3323        if (!outputDesc->isDuplicated() && outputDesc->device() & AUDIO_DEVICE_OUT_ALL_A2DP) {
3324            return mOutputs.keyAt(i);
3325        }
3326    }
3327
3328    return 0;
3329}
3330
3331void AudioPolicyManager::checkA2dpSuspend()
3332{
3333    audio_io_handle_t a2dpOutput = getA2dpOutput();
3334    if (a2dpOutput == 0) {
3335        mA2dpSuspended = false;
3336        return;
3337    }
3338
3339    bool isScoConnected =
3340            (mAvailableInputDevices.types() & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) != 0;
3341    // suspend A2DP output if:
3342    //      (NOT already suspended) &&
3343    //      ((SCO device is connected &&
3344    //       (forced usage for communication || for record is SCO))) ||
3345    //      (phone state is ringing || in call)
3346    //
3347    // restore A2DP output if:
3348    //      (Already suspended) &&
3349    //      ((SCO device is NOT connected ||
3350    //       (forced usage NOT for communication && NOT for record is SCO))) &&
3351    //      (phone state is NOT ringing && NOT in call)
3352    //
3353    if (mA2dpSuspended) {
3354        if ((!isScoConnected ||
3355             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO) &&
3356              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] != AUDIO_POLICY_FORCE_BT_SCO))) &&
3357             ((mPhoneState != AUDIO_MODE_IN_CALL) &&
3358              (mPhoneState != AUDIO_MODE_RINGTONE))) {
3359
3360            mpClientInterface->restoreOutput(a2dpOutput);
3361            mA2dpSuspended = false;
3362        }
3363    } else {
3364        if ((isScoConnected &&
3365             ((mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
3366              (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO))) ||
3367             ((mPhoneState == AUDIO_MODE_IN_CALL) ||
3368              (mPhoneState == AUDIO_MODE_RINGTONE))) {
3369
3370            mpClientInterface->suspendOutput(a2dpOutput);
3371            mA2dpSuspended = true;
3372        }
3373    }
3374}
3375
3376audio_devices_t AudioPolicyManager::getNewOutputDevice(audio_io_handle_t output, bool fromCache)
3377{
3378    audio_devices_t device = AUDIO_DEVICE_NONE;
3379
3380    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3381
3382    ssize_t index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3383    if (index >= 0) {
3384        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3385        if (patchDesc->mUid != mUidCached) {
3386            ALOGV("getNewOutputDevice() device %08x forced by patch %d",
3387                  outputDesc->device(), outputDesc->mPatchHandle);
3388            return outputDesc->device();
3389        }
3390    }
3391
3392    // check the following by order of priority to request a routing change if necessary:
3393    // 1: the strategy enforced audible is active on the output:
3394    //      use device for strategy enforced audible
3395    // 2: we are in call or the strategy phone is active on the output:
3396    //      use device for strategy phone
3397    // 3: the strategy sonification is active on the output:
3398    //      use device for strategy sonification
3399    // 4: the strategy "respectful" sonification is active on the output:
3400    //      use device for strategy "respectful" sonification
3401    // 5: the strategy media is active on the output:
3402    //      use device for strategy media
3403    // 6: the strategy DTMF is active on the output:
3404    //      use device for strategy DTMF
3405    if (outputDesc->isStrategyActive(STRATEGY_ENFORCED_AUDIBLE)) {
3406        device = getDeviceForStrategy(STRATEGY_ENFORCED_AUDIBLE, fromCache);
3407    } else if (isInCall() ||
3408                    outputDesc->isStrategyActive(STRATEGY_PHONE)) {
3409        device = getDeviceForStrategy(STRATEGY_PHONE, fromCache);
3410    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION)) {
3411        device = getDeviceForStrategy(STRATEGY_SONIFICATION, fromCache);
3412    } else if (outputDesc->isStrategyActive(STRATEGY_SONIFICATION_RESPECTFUL)) {
3413        device = getDeviceForStrategy(STRATEGY_SONIFICATION_RESPECTFUL, fromCache);
3414    } else if (outputDesc->isStrategyActive(STRATEGY_MEDIA)) {
3415        device = getDeviceForStrategy(STRATEGY_MEDIA, fromCache);
3416    } else if (outputDesc->isStrategyActive(STRATEGY_DTMF)) {
3417        device = getDeviceForStrategy(STRATEGY_DTMF, fromCache);
3418    }
3419
3420    ALOGV("getNewOutputDevice() selected device %x", device);
3421    return device;
3422}
3423
3424audio_devices_t AudioPolicyManager::getNewInputDevice(audio_io_handle_t input)
3425{
3426    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
3427
3428    ssize_t index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
3429    if (index >= 0) {
3430        sp<AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3431        if (patchDesc->mUid != mUidCached) {
3432            ALOGV("getNewInputDevice() device %08x forced by patch %d",
3433                  inputDesc->mDevice, inputDesc->mPatchHandle);
3434            return inputDesc->mDevice;
3435        }
3436    }
3437
3438    audio_devices_t device = getDeviceForInputSource(inputDesc->mInputSource);
3439
3440    ALOGV("getNewInputDevice() selected device %x", device);
3441    return device;
3442}
3443
3444uint32_t AudioPolicyManager::getStrategyForStream(audio_stream_type_t stream) {
3445    return (uint32_t)getStrategy(stream);
3446}
3447
3448audio_devices_t AudioPolicyManager::getDevicesForStream(audio_stream_type_t stream) {
3449    // By checking the range of stream before calling getStrategy, we avoid
3450    // getStrategy's behavior for invalid streams.  getStrategy would do a ALOGE
3451    // and then return STRATEGY_MEDIA, but we want to return the empty set.
3452    if (stream < (audio_stream_type_t) 0 || stream >= AUDIO_STREAM_CNT) {
3453        return AUDIO_DEVICE_NONE;
3454    }
3455    audio_devices_t devices;
3456    AudioPolicyManager::routing_strategy strategy = getStrategy(stream);
3457    devices = getDeviceForStrategy(strategy, true /*fromCache*/);
3458    SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(devices, mOutputs);
3459    for (size_t i = 0; i < outputs.size(); i++) {
3460        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
3461        if (outputDesc->isStrategyActive(strategy)) {
3462            devices = outputDesc->device();
3463            break;
3464        }
3465    }
3466    return devices;
3467}
3468
3469AudioPolicyManager::routing_strategy AudioPolicyManager::getStrategy(
3470        audio_stream_type_t stream) {
3471    // stream to strategy mapping
3472    switch (stream) {
3473    case AUDIO_STREAM_VOICE_CALL:
3474    case AUDIO_STREAM_BLUETOOTH_SCO:
3475        return STRATEGY_PHONE;
3476    case AUDIO_STREAM_RING:
3477    case AUDIO_STREAM_ALARM:
3478        return STRATEGY_SONIFICATION;
3479    case AUDIO_STREAM_NOTIFICATION:
3480        return STRATEGY_SONIFICATION_RESPECTFUL;
3481    case AUDIO_STREAM_DTMF:
3482        return STRATEGY_DTMF;
3483    default:
3484        ALOGE("unknown stream type");
3485    case AUDIO_STREAM_SYSTEM:
3486        // NOTE: SYSTEM stream uses MEDIA strategy because muting music and switching outputs
3487        // while key clicks are played produces a poor result
3488    case AUDIO_STREAM_TTS:
3489    case AUDIO_STREAM_MUSIC:
3490        return STRATEGY_MEDIA;
3491    case AUDIO_STREAM_ENFORCED_AUDIBLE:
3492        return STRATEGY_ENFORCED_AUDIBLE;
3493    }
3494}
3495
3496uint32_t AudioPolicyManager::getStrategyForAttr(const audio_attributes_t *attr) {
3497    // flags to strategy mapping
3498    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
3499        return (uint32_t) STRATEGY_ENFORCED_AUDIBLE;
3500    }
3501
3502    // usage to strategy mapping
3503    switch (attr->usage) {
3504    case AUDIO_USAGE_MEDIA:
3505    case AUDIO_USAGE_GAME:
3506    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
3507    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
3508    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
3509        return (uint32_t) STRATEGY_MEDIA;
3510
3511    case AUDIO_USAGE_VOICE_COMMUNICATION:
3512        return (uint32_t) STRATEGY_PHONE;
3513
3514    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
3515        return (uint32_t) STRATEGY_DTMF;
3516
3517    case AUDIO_USAGE_ALARM:
3518    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
3519        return (uint32_t) STRATEGY_SONIFICATION;
3520
3521    case AUDIO_USAGE_NOTIFICATION:
3522    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
3523    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
3524    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
3525    case AUDIO_USAGE_NOTIFICATION_EVENT:
3526        return (uint32_t) STRATEGY_SONIFICATION_RESPECTFUL;
3527
3528    case AUDIO_USAGE_UNKNOWN:
3529    default:
3530        return (uint32_t) STRATEGY_MEDIA;
3531    }
3532}
3533
3534void AudioPolicyManager::handleNotificationRoutingForStream(audio_stream_type_t stream) {
3535    switch(stream) {
3536    case AUDIO_STREAM_MUSIC:
3537        checkOutputForStrategy(STRATEGY_SONIFICATION_RESPECTFUL);
3538        updateDevicesAndOutputs();
3539        break;
3540    default:
3541        break;
3542    }
3543}
3544
3545audio_devices_t AudioPolicyManager::getDeviceForStrategy(routing_strategy strategy,
3546                                                             bool fromCache)
3547{
3548    uint32_t device = AUDIO_DEVICE_NONE;
3549
3550    if (fromCache) {
3551        ALOGVV("getDeviceForStrategy() from cache strategy %d, device %x",
3552              strategy, mDeviceForStrategy[strategy]);
3553        return mDeviceForStrategy[strategy];
3554    }
3555    audio_devices_t availableOutputDeviceTypes = mAvailableOutputDevices.types();
3556    switch (strategy) {
3557
3558    case STRATEGY_SONIFICATION_RESPECTFUL:
3559        if (isInCall()) {
3560            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3561        } else if (isStreamActiveRemotely(AUDIO_STREAM_MUSIC,
3562                SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3563            // while media is playing on a remote device, use the the sonification behavior.
3564            // Note that we test this usecase before testing if media is playing because
3565            //   the isStreamActive() method only informs about the activity of a stream, not
3566            //   if it's for local playback. Note also that we use the same delay between both tests
3567            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3568        } else if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY)) {
3569            // while media is playing (or has recently played), use the same device
3570            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3571        } else {
3572            // when media is not playing anymore, fall back on the sonification behavior
3573            device = getDeviceForStrategy(STRATEGY_SONIFICATION, false /*fromCache*/);
3574        }
3575
3576        break;
3577
3578    case STRATEGY_DTMF:
3579        if (!isInCall()) {
3580            // when off call, DTMF strategy follows the same rules as MEDIA strategy
3581            device = getDeviceForStrategy(STRATEGY_MEDIA, false /*fromCache*/);
3582            break;
3583        }
3584        // when in call, DTMF and PHONE strategies follow the same rules
3585        // FALL THROUGH
3586
3587    case STRATEGY_PHONE:
3588        // for phone strategy, we first consider the forced use and then the available devices by order
3589        // of priority
3590        switch (mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]) {
3591        case AUDIO_POLICY_FORCE_BT_SCO:
3592            if (!isInCall() || strategy != STRATEGY_DTMF) {
3593                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
3594                if (device) break;
3595            }
3596            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
3597            if (device) break;
3598            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_SCO;
3599            if (device) break;
3600            // if SCO device is requested but no SCO device is available, fall back to default case
3601            // FALL THROUGH
3602
3603        default:    // FORCE_NONE
3604            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to A2DP
3605            if (!isInCall() &&
3606                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3607                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3608                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3609                if (device) break;
3610                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3611                if (device) break;
3612            }
3613            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3614            if (device) break;
3615            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3616            if (device) break;
3617            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3618                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3619                if (device) break;
3620                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3621                if (device) break;
3622                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3623                if (device) break;
3624                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3625                if (device) break;
3626                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3627                if (device) break;
3628            }
3629            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_EARPIECE;
3630            if (device) break;
3631            device = mDefaultOutputDevice->mDeviceType;
3632            if (device == AUDIO_DEVICE_NONE) {
3633                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE");
3634            }
3635            break;
3636
3637        case AUDIO_POLICY_FORCE_SPEAKER:
3638            // when not in a phone call, phone strategy should route STREAM_VOICE_CALL to
3639            // A2DP speaker when forcing to speaker output
3640            if (!isInCall() &&
3641                    (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3642                    (getA2dpOutput() != 0) && !mA2dpSuspended) {
3643                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3644                if (device) break;
3645            }
3646            if (mPhoneState != AUDIO_MODE_IN_CALL) {
3647                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3648                if (device) break;
3649                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3650                if (device) break;
3651                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3652                if (device) break;
3653                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3654                if (device) break;
3655                device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3656                if (device) break;
3657            }
3658            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3659            if (device) break;
3660            device = mDefaultOutputDevice->mDeviceType;
3661            if (device == AUDIO_DEVICE_NONE) {
3662                ALOGE("getDeviceForStrategy() no device found for STRATEGY_PHONE, FORCE_SPEAKER");
3663            }
3664            break;
3665        }
3666    break;
3667
3668    case STRATEGY_SONIFICATION:
3669
3670        // If incall, just select the STRATEGY_PHONE device: The rest of the behavior is handled by
3671        // handleIncallSonification().
3672        if (isInCall()) {
3673            device = getDeviceForStrategy(STRATEGY_PHONE, false /*fromCache*/);
3674            break;
3675        }
3676        // FALL THROUGH
3677
3678    case STRATEGY_ENFORCED_AUDIBLE:
3679        // strategy STRATEGY_ENFORCED_AUDIBLE uses same routing policy as STRATEGY_SONIFICATION
3680        // except:
3681        //   - when in call where it doesn't default to STRATEGY_PHONE behavior
3682        //   - in countries where not enforced in which case it follows STRATEGY_MEDIA
3683
3684        if ((strategy == STRATEGY_SONIFICATION) ||
3685                (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_SYSTEM_ENFORCED)) {
3686            device = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3687            if (device == AUDIO_DEVICE_NONE) {
3688                ALOGE("getDeviceForStrategy() speaker device not found for STRATEGY_SONIFICATION");
3689            }
3690        }
3691        // The second device used for sonification is the same as the device used by media strategy
3692        // FALL THROUGH
3693
3694    case STRATEGY_MEDIA: {
3695        uint32_t device2 = AUDIO_DEVICE_NONE;
3696        if (strategy != STRATEGY_SONIFICATION) {
3697            // no sonification on remote submix (e.g. WFD)
3698            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
3699        }
3700        if ((device2 == AUDIO_DEVICE_NONE) &&
3701                (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
3702                (getA2dpOutput() != 0) && !mA2dpSuspended) {
3703            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP;
3704            if (device2 == AUDIO_DEVICE_NONE) {
3705                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES;
3706            }
3707            if (device2 == AUDIO_DEVICE_NONE) {
3708                device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER;
3709            }
3710        }
3711        if (device2 == AUDIO_DEVICE_NONE) {
3712            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
3713        }
3714        if (device2 == AUDIO_DEVICE_NONE) {
3715            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_WIRED_HEADSET;
3716        }
3717        if (device2 == AUDIO_DEVICE_NONE) {
3718            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_ACCESSORY;
3719        }
3720        if (device2 == AUDIO_DEVICE_NONE) {
3721            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_USB_DEVICE;
3722        }
3723        if (device2 == AUDIO_DEVICE_NONE) {
3724            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET;
3725        }
3726        if ((device2 == AUDIO_DEVICE_NONE) && (strategy != STRATEGY_SONIFICATION)) {
3727            // no sonification on aux digital (e.g. HDMI)
3728            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_DIGITAL;
3729        }
3730        if ((device2 == AUDIO_DEVICE_NONE) &&
3731                (mForceUse[AUDIO_POLICY_FORCE_FOR_DOCK] == AUDIO_POLICY_FORCE_ANALOG_DOCK)) {
3732            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET;
3733        }
3734        if (device2 == AUDIO_DEVICE_NONE) {
3735            device2 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPEAKER;
3736        }
3737        int device3 = AUDIO_DEVICE_NONE;
3738        if (strategy == STRATEGY_MEDIA) {
3739            // ARC, SPDIF and AUX_LINE can co-exist with others.
3740            device3 = availableOutputDeviceTypes & AUDIO_DEVICE_OUT_HDMI_ARC;
3741            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_SPDIF);
3742            device3 |= (availableOutputDeviceTypes & AUDIO_DEVICE_OUT_AUX_LINE);
3743        }
3744
3745        device2 |= device3;
3746        // device is DEVICE_OUT_SPEAKER if we come from case STRATEGY_SONIFICATION or
3747        // STRATEGY_ENFORCED_AUDIBLE, AUDIO_DEVICE_NONE otherwise
3748        device |= device2;
3749
3750        // If hdmi system audio mode is on, remove speaker out of output list.
3751        if ((strategy == STRATEGY_MEDIA) &&
3752            (mForceUse[AUDIO_POLICY_FORCE_FOR_HDMI_SYSTEM_AUDIO] ==
3753                AUDIO_POLICY_FORCE_HDMI_SYSTEM_AUDIO_ENFORCED)) {
3754            device &= ~AUDIO_DEVICE_OUT_SPEAKER;
3755        }
3756
3757        if (device) break;
3758        device = mDefaultOutputDevice->mDeviceType;
3759        if (device == AUDIO_DEVICE_NONE) {
3760            ALOGE("getDeviceForStrategy() no device found for STRATEGY_MEDIA");
3761        }
3762        } break;
3763
3764    default:
3765        ALOGW("getDeviceForStrategy() unknown strategy: %d", strategy);
3766        break;
3767    }
3768
3769    ALOGVV("getDeviceForStrategy() strategy %d, device %x", strategy, device);
3770    return device;
3771}
3772
3773void AudioPolicyManager::updateDevicesAndOutputs()
3774{
3775    for (int i = 0; i < NUM_STRATEGIES; i++) {
3776        mDeviceForStrategy[i] = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3777    }
3778    mPreviousOutputs = mOutputs;
3779}
3780
3781uint32_t AudioPolicyManager::checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc,
3782                                                       audio_devices_t prevDevice,
3783                                                       uint32_t delayMs)
3784{
3785    // mute/unmute strategies using an incompatible device combination
3786    // if muting, wait for the audio in pcm buffer to be drained before proceeding
3787    // if unmuting, unmute only after the specified delay
3788    if (outputDesc->isDuplicated()) {
3789        return 0;
3790    }
3791
3792    uint32_t muteWaitMs = 0;
3793    audio_devices_t device = outputDesc->device();
3794    bool shouldMute = outputDesc->isActive() && (popcount(device) >= 2);
3795
3796    for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3797        audio_devices_t curDevice = getDeviceForStrategy((routing_strategy)i, false /*fromCache*/);
3798        bool mute = shouldMute && (curDevice & device) && (curDevice != device);
3799        bool doMute = false;
3800
3801        if (mute && !outputDesc->mStrategyMutedByDevice[i]) {
3802            doMute = true;
3803            outputDesc->mStrategyMutedByDevice[i] = true;
3804        } else if (!mute && outputDesc->mStrategyMutedByDevice[i]){
3805            doMute = true;
3806            outputDesc->mStrategyMutedByDevice[i] = false;
3807        }
3808        if (doMute) {
3809            for (size_t j = 0; j < mOutputs.size(); j++) {
3810                sp<AudioOutputDescriptor> desc = mOutputs.valueAt(j);
3811                // skip output if it does not share any device with current output
3812                if ((desc->supportedDevices() & outputDesc->supportedDevices())
3813                        == AUDIO_DEVICE_NONE) {
3814                    continue;
3815                }
3816                audio_io_handle_t curOutput = mOutputs.keyAt(j);
3817                ALOGVV("checkDeviceMuteStrategies() %s strategy %d (curDevice %04x) on output %d",
3818                      mute ? "muting" : "unmuting", i, curDevice, curOutput);
3819                setStrategyMute((routing_strategy)i, mute, curOutput, mute ? 0 : delayMs);
3820                if (desc->isStrategyActive((routing_strategy)i)) {
3821                    if (mute) {
3822                        // FIXME: should not need to double latency if volume could be applied
3823                        // immediately by the audioflinger mixer. We must account for the delay
3824                        // between now and the next time the audioflinger thread for this output
3825                        // will process a buffer (which corresponds to one buffer size,
3826                        // usually 1/2 or 1/4 of the latency).
3827                        if (muteWaitMs < desc->latency() * 2) {
3828                            muteWaitMs = desc->latency() * 2;
3829                        }
3830                    }
3831                }
3832            }
3833        }
3834    }
3835
3836    // temporary mute output if device selection changes to avoid volume bursts due to
3837    // different per device volumes
3838    if (outputDesc->isActive() && (device != prevDevice)) {
3839        if (muteWaitMs < outputDesc->latency() * 2) {
3840            muteWaitMs = outputDesc->latency() * 2;
3841        }
3842        for (size_t i = 0; i < NUM_STRATEGIES; i++) {
3843            if (outputDesc->isStrategyActive((routing_strategy)i)) {
3844                setStrategyMute((routing_strategy)i, true, outputDesc->mIoHandle);
3845                // do tempMute unmute after twice the mute wait time
3846                setStrategyMute((routing_strategy)i, false, outputDesc->mIoHandle,
3847                                muteWaitMs *2, device);
3848            }
3849        }
3850    }
3851
3852    // wait for the PCM output buffers to empty before proceeding with the rest of the command
3853    if (muteWaitMs > delayMs) {
3854        muteWaitMs -= delayMs;
3855        usleep(muteWaitMs * 1000);
3856        return muteWaitMs;
3857    }
3858    return 0;
3859}
3860
3861uint32_t AudioPolicyManager::setOutputDevice(audio_io_handle_t output,
3862                                             audio_devices_t device,
3863                                             bool force,
3864                                             int delayMs,
3865                                             audio_patch_handle_t *patchHandle,
3866                                             const char* address)
3867{
3868    ALOGV("setOutputDevice() output %d device %04x delayMs %d", output, device, delayMs);
3869    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3870    AudioParameter param;
3871    uint32_t muteWaitMs;
3872
3873    if (outputDesc->isDuplicated()) {
3874        muteWaitMs = setOutputDevice(outputDesc->mOutput1->mIoHandle, device, force, delayMs);
3875        muteWaitMs += setOutputDevice(outputDesc->mOutput2->mIoHandle, device, force, delayMs);
3876        return muteWaitMs;
3877    }
3878    // no need to proceed if new device is not AUDIO_DEVICE_NONE and not supported by current
3879    // output profile
3880    if ((device != AUDIO_DEVICE_NONE) &&
3881            ((device & outputDesc->mProfile->mSupportedDevices.types()) == 0)) {
3882        return 0;
3883    }
3884
3885    // filter devices according to output selected
3886    device = (audio_devices_t)(device & outputDesc->mProfile->mSupportedDevices.types());
3887
3888    audio_devices_t prevDevice = outputDesc->mDevice;
3889
3890    ALOGV("setOutputDevice() prevDevice %04x", prevDevice);
3891
3892    if (device != AUDIO_DEVICE_NONE) {
3893        outputDesc->mDevice = device;
3894    }
3895    muteWaitMs = checkDeviceMuteStrategies(outputDesc, prevDevice, delayMs);
3896
3897    // Do not change the routing if:
3898    //  - the requested device is AUDIO_DEVICE_NONE
3899    //  - the requested device is the same as current device and force is not specified.
3900    // Doing this check here allows the caller to call setOutputDevice() without conditions
3901    if ((device == AUDIO_DEVICE_NONE || device == prevDevice) && !force) {
3902        ALOGV("setOutputDevice() setting same device %04x or null device for output %d", device, output);
3903        return muteWaitMs;
3904    }
3905
3906    ALOGV("setOutputDevice() changing device");
3907
3908    // do the routing
3909    if (device == AUDIO_DEVICE_NONE) {
3910        resetOutputDevice(output, delayMs, NULL);
3911    } else {
3912        DeviceVector deviceList = (address == NULL) ?
3913                mAvailableOutputDevices.getDevicesFromType(device)
3914                : mAvailableOutputDevices.getDevicesFromTypeAddr(device, String8(address));
3915        if (!deviceList.isEmpty()) {
3916            struct audio_patch patch;
3917            outputDesc->toAudioPortConfig(&patch.sources[0]);
3918            patch.num_sources = 1;
3919            patch.num_sinks = 0;
3920            for (size_t i = 0; i < deviceList.size() && i < AUDIO_PATCH_PORTS_MAX; i++) {
3921                deviceList.itemAt(i)->toAudioPortConfig(&patch.sinks[i]);
3922                patch.num_sinks++;
3923            }
3924            ssize_t index;
3925            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
3926                index = mAudioPatches.indexOfKey(*patchHandle);
3927            } else {
3928                index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3929            }
3930            sp< AudioPatch> patchDesc;
3931            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
3932            if (index >= 0) {
3933                patchDesc = mAudioPatches.valueAt(index);
3934                afPatchHandle = patchDesc->mAfPatchHandle;
3935            }
3936
3937            status_t status = mpClientInterface->createAudioPatch(&patch,
3938                                                                   &afPatchHandle,
3939                                                                   delayMs);
3940            ALOGV("setOutputDevice() createAudioPatch returned %d patchHandle %d"
3941                    "num_sources %d num_sinks %d",
3942                                       status, afPatchHandle, patch.num_sources, patch.num_sinks);
3943            if (status == NO_ERROR) {
3944                if (index < 0) {
3945                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
3946                                               &patch, mUidCached);
3947                    addAudioPatch(patchDesc->mHandle, patchDesc);
3948                } else {
3949                    patchDesc->mPatch = patch;
3950                }
3951                patchDesc->mAfPatchHandle = afPatchHandle;
3952                patchDesc->mUid = mUidCached;
3953                if (patchHandle) {
3954                    *patchHandle = patchDesc->mHandle;
3955                }
3956                outputDesc->mPatchHandle = patchDesc->mHandle;
3957                nextAudioPortGeneration();
3958                mpClientInterface->onAudioPatchListUpdate();
3959            }
3960        }
3961    }
3962
3963    // update stream volumes according to new device
3964    applyStreamVolumes(output, device, delayMs);
3965
3966    return muteWaitMs;
3967}
3968
3969status_t AudioPolicyManager::resetOutputDevice(audio_io_handle_t output,
3970                                               int delayMs,
3971                                               audio_patch_handle_t *patchHandle)
3972{
3973    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
3974    ssize_t index;
3975    if (patchHandle) {
3976        index = mAudioPatches.indexOfKey(*patchHandle);
3977    } else {
3978        index = mAudioPatches.indexOfKey(outputDesc->mPatchHandle);
3979    }
3980    if (index < 0) {
3981        return INVALID_OPERATION;
3982    }
3983    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
3984    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, delayMs);
3985    ALOGV("resetOutputDevice() releaseAudioPatch returned %d", status);
3986    outputDesc->mPatchHandle = 0;
3987    removeAudioPatch(patchDesc->mHandle);
3988    nextAudioPortGeneration();
3989    mpClientInterface->onAudioPatchListUpdate();
3990    return status;
3991}
3992
3993status_t AudioPolicyManager::setInputDevice(audio_io_handle_t input,
3994                                            audio_devices_t device,
3995                                            bool force,
3996                                            audio_patch_handle_t *patchHandle)
3997{
3998    status_t status = NO_ERROR;
3999
4000    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4001    if ((device != AUDIO_DEVICE_NONE) && ((device != inputDesc->mDevice) || force)) {
4002        inputDesc->mDevice = device;
4003
4004        DeviceVector deviceList = mAvailableInputDevices.getDevicesFromType(device);
4005        if (!deviceList.isEmpty()) {
4006            struct audio_patch patch;
4007            inputDesc->toAudioPortConfig(&patch.sinks[0]);
4008            // AUDIO_SOURCE_HOTWORD is for internal use only:
4009            // handled as AUDIO_SOURCE_VOICE_RECOGNITION by the audio HAL
4010            if (patch.sinks[0].ext.mix.usecase.source == AUDIO_SOURCE_HOTWORD) {
4011                patch.sinks[0].ext.mix.usecase.source = AUDIO_SOURCE_VOICE_RECOGNITION;
4012            }
4013            patch.num_sinks = 1;
4014            //only one input device for now
4015            deviceList.itemAt(0)->toAudioPortConfig(&patch.sources[0]);
4016            patch.num_sources = 1;
4017            ssize_t index;
4018            if (patchHandle && *patchHandle != AUDIO_PATCH_HANDLE_NONE) {
4019                index = mAudioPatches.indexOfKey(*patchHandle);
4020            } else {
4021                index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4022            }
4023            sp< AudioPatch> patchDesc;
4024            audio_patch_handle_t afPatchHandle = AUDIO_PATCH_HANDLE_NONE;
4025            if (index >= 0) {
4026                patchDesc = mAudioPatches.valueAt(index);
4027                afPatchHandle = patchDesc->mAfPatchHandle;
4028            }
4029
4030            status_t status = mpClientInterface->createAudioPatch(&patch,
4031                                                                  &afPatchHandle,
4032                                                                  0);
4033            ALOGV("setInputDevice() createAudioPatch returned %d patchHandle %d",
4034                                                                          status, afPatchHandle);
4035            if (status == NO_ERROR) {
4036                if (index < 0) {
4037                    patchDesc = new AudioPatch((audio_patch_handle_t)nextUniqueId(),
4038                                               &patch, mUidCached);
4039                    addAudioPatch(patchDesc->mHandle, patchDesc);
4040                } else {
4041                    patchDesc->mPatch = patch;
4042                }
4043                patchDesc->mAfPatchHandle = afPatchHandle;
4044                patchDesc->mUid = mUidCached;
4045                if (patchHandle) {
4046                    *patchHandle = patchDesc->mHandle;
4047                }
4048                inputDesc->mPatchHandle = patchDesc->mHandle;
4049                nextAudioPortGeneration();
4050                mpClientInterface->onAudioPatchListUpdate();
4051            }
4052        }
4053    }
4054    return status;
4055}
4056
4057status_t AudioPolicyManager::resetInputDevice(audio_io_handle_t input,
4058                                              audio_patch_handle_t *patchHandle)
4059{
4060    sp<AudioInputDescriptor> inputDesc = mInputs.valueFor(input);
4061    ssize_t index;
4062    if (patchHandle) {
4063        index = mAudioPatches.indexOfKey(*patchHandle);
4064    } else {
4065        index = mAudioPatches.indexOfKey(inputDesc->mPatchHandle);
4066    }
4067    if (index < 0) {
4068        return INVALID_OPERATION;
4069    }
4070    sp< AudioPatch> patchDesc = mAudioPatches.valueAt(index);
4071    status_t status = mpClientInterface->releaseAudioPatch(patchDesc->mAfPatchHandle, 0);
4072    ALOGV("resetInputDevice() releaseAudioPatch returned %d", status);
4073    inputDesc->mPatchHandle = 0;
4074    removeAudioPatch(patchDesc->mHandle);
4075    nextAudioPortGeneration();
4076    mpClientInterface->onAudioPatchListUpdate();
4077    return status;
4078}
4079
4080sp<AudioPolicyManager::IOProfile> AudioPolicyManager::getInputProfile(audio_devices_t device,
4081                                                   uint32_t& samplingRate,
4082                                                   audio_format_t format,
4083                                                   audio_channel_mask_t channelMask,
4084                                                   audio_input_flags_t flags)
4085{
4086    // Choose an input profile based on the requested capture parameters: select the first available
4087    // profile supporting all requested parameters.
4088
4089    for (size_t i = 0; i < mHwModules.size(); i++)
4090    {
4091        if (mHwModules[i]->mHandle == 0) {
4092            continue;
4093        }
4094        for (size_t j = 0; j < mHwModules[i]->mInputProfiles.size(); j++)
4095        {
4096            sp<IOProfile> profile = mHwModules[i]->mInputProfiles[j];
4097            // profile->log();
4098            if (profile->isCompatibleProfile(device, samplingRate,
4099                                             &samplingRate /*updatedSamplingRate*/,
4100                                             format, channelMask, (audio_output_flags_t) flags)) {
4101                return profile;
4102            }
4103        }
4104    }
4105    return NULL;
4106}
4107
4108audio_devices_t AudioPolicyManager::getDeviceForInputSource(audio_source_t inputSource)
4109{
4110    uint32_t device = AUDIO_DEVICE_NONE;
4111    audio_devices_t availableDeviceTypes = mAvailableInputDevices.types() &
4112                                            ~AUDIO_DEVICE_BIT_IN;
4113    switch (inputSource) {
4114    case AUDIO_SOURCE_VOICE_UPLINK:
4115      if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4116          device = AUDIO_DEVICE_IN_VOICE_CALL;
4117          break;
4118      }
4119      // FALL THROUGH
4120
4121    case AUDIO_SOURCE_DEFAULT:
4122    case AUDIO_SOURCE_MIC:
4123    if (availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_A2DP) {
4124        device = AUDIO_DEVICE_IN_BLUETOOTH_A2DP;
4125        break;
4126    }
4127    // FALL THROUGH
4128
4129    case AUDIO_SOURCE_VOICE_RECOGNITION:
4130    case AUDIO_SOURCE_HOTWORD:
4131    case AUDIO_SOURCE_VOICE_COMMUNICATION:
4132        if (mForceUse[AUDIO_POLICY_FORCE_FOR_RECORD] == AUDIO_POLICY_FORCE_BT_SCO &&
4133                availableDeviceTypes & AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET) {
4134            device = AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET;
4135        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_WIRED_HEADSET) {
4136            device = AUDIO_DEVICE_IN_WIRED_HEADSET;
4137        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_USB_DEVICE) {
4138            device = AUDIO_DEVICE_IN_USB_DEVICE;
4139        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4140            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4141        }
4142        break;
4143    case AUDIO_SOURCE_CAMCORDER:
4144        if (availableDeviceTypes & AUDIO_DEVICE_IN_BACK_MIC) {
4145            device = AUDIO_DEVICE_IN_BACK_MIC;
4146        } else if (availableDeviceTypes & AUDIO_DEVICE_IN_BUILTIN_MIC) {
4147            device = AUDIO_DEVICE_IN_BUILTIN_MIC;
4148        }
4149        break;
4150    case AUDIO_SOURCE_VOICE_DOWNLINK:
4151    case AUDIO_SOURCE_VOICE_CALL:
4152        if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
4153            device = AUDIO_DEVICE_IN_VOICE_CALL;
4154        }
4155        break;
4156    case AUDIO_SOURCE_REMOTE_SUBMIX:
4157        if (availableDeviceTypes & AUDIO_DEVICE_IN_REMOTE_SUBMIX) {
4158            device = AUDIO_DEVICE_IN_REMOTE_SUBMIX;
4159        }
4160        break;
4161    default:
4162        ALOGW("getDeviceForInputSource() invalid input source %d", inputSource);
4163        break;
4164    }
4165    ALOGV("getDeviceForInputSource()input source %d, device %08x", inputSource, device);
4166    return device;
4167}
4168
4169bool AudioPolicyManager::isVirtualInputDevice(audio_devices_t device)
4170{
4171    if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
4172        device &= ~AUDIO_DEVICE_BIT_IN;
4173        if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
4174            return true;
4175    }
4176    return false;
4177}
4178
4179bool AudioPolicyManager::deviceDistinguishesOnAddress(audio_devices_t device) {
4180    return ((device & APM_AUDIO_DEVICE_MATCH_ADDRESS_ALL) != 0);
4181}
4182
4183audio_io_handle_t AudioPolicyManager::getActiveInput(bool ignoreVirtualInputs)
4184{
4185    for (size_t i = 0; i < mInputs.size(); i++) {
4186        const sp<AudioInputDescriptor>  input_descriptor = mInputs.valueAt(i);
4187        if ((input_descriptor->mRefCount > 0)
4188                && (!ignoreVirtualInputs || !isVirtualInputDevice(input_descriptor->mDevice))) {
4189            return mInputs.keyAt(i);
4190        }
4191    }
4192    return 0;
4193}
4194
4195
4196audio_devices_t AudioPolicyManager::getDeviceForVolume(audio_devices_t device)
4197{
4198    if (device == AUDIO_DEVICE_NONE) {
4199        // this happens when forcing a route update and no track is active on an output.
4200        // In this case the returned category is not important.
4201        device =  AUDIO_DEVICE_OUT_SPEAKER;
4202    } else if (popcount(device) > 1) {
4203        // Multiple device selection is either:
4204        //  - speaker + one other device: give priority to speaker in this case.
4205        //  - one A2DP device + another device: happens with duplicated output. In this case
4206        // retain the device on the A2DP output as the other must not correspond to an active
4207        // selection if not the speaker.
4208        if (device & AUDIO_DEVICE_OUT_SPEAKER) {
4209            device = AUDIO_DEVICE_OUT_SPEAKER;
4210        } else {
4211            device = (audio_devices_t)(device & AUDIO_DEVICE_OUT_ALL_A2DP);
4212        }
4213    }
4214
4215    ALOGW_IF(popcount(device) != 1,
4216            "getDeviceForVolume() invalid device combination: %08x",
4217            device);
4218
4219    return device;
4220}
4221
4222AudioPolicyManager::device_category AudioPolicyManager::getDeviceCategory(audio_devices_t device)
4223{
4224    switch(getDeviceForVolume(device)) {
4225        case AUDIO_DEVICE_OUT_EARPIECE:
4226            return DEVICE_CATEGORY_EARPIECE;
4227        case AUDIO_DEVICE_OUT_WIRED_HEADSET:
4228        case AUDIO_DEVICE_OUT_WIRED_HEADPHONE:
4229        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO:
4230        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET:
4231        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP:
4232        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES:
4233            return DEVICE_CATEGORY_HEADSET;
4234        case AUDIO_DEVICE_OUT_SPEAKER:
4235        case AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT:
4236        case AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER:
4237        case AUDIO_DEVICE_OUT_AUX_DIGITAL:
4238        case AUDIO_DEVICE_OUT_USB_ACCESSORY:
4239        case AUDIO_DEVICE_OUT_USB_DEVICE:
4240        case AUDIO_DEVICE_OUT_REMOTE_SUBMIX:
4241        default:
4242            return DEVICE_CATEGORY_SPEAKER;
4243    }
4244}
4245
4246float AudioPolicyManager::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
4247        int indexInUi)
4248{
4249    device_category deviceCategory = getDeviceCategory(device);
4250    const VolumeCurvePoint *curve = streamDesc.mVolumeCurve[deviceCategory];
4251
4252    // the volume index in the UI is relative to the min and max volume indices for this stream type
4253    int nbSteps = 1 + curve[VOLMAX].mIndex -
4254            curve[VOLMIN].mIndex;
4255    int volIdx = (nbSteps * (indexInUi - streamDesc.mIndexMin)) /
4256            (streamDesc.mIndexMax - streamDesc.mIndexMin);
4257
4258    // find what part of the curve this index volume belongs to, or if it's out of bounds
4259    int segment = 0;
4260    if (volIdx < curve[VOLMIN].mIndex) {         // out of bounds
4261        return 0.0f;
4262    } else if (volIdx < curve[VOLKNEE1].mIndex) {
4263        segment = 0;
4264    } else if (volIdx < curve[VOLKNEE2].mIndex) {
4265        segment = 1;
4266    } else if (volIdx <= curve[VOLMAX].mIndex) {
4267        segment = 2;
4268    } else {                                                               // out of bounds
4269        return 1.0f;
4270    }
4271
4272    // linear interpolation in the attenuation table in dB
4273    float decibels = curve[segment].mDBAttenuation +
4274            ((float)(volIdx - curve[segment].mIndex)) *
4275                ( (curve[segment+1].mDBAttenuation -
4276                        curve[segment].mDBAttenuation) /
4277                    ((float)(curve[segment+1].mIndex -
4278                            curve[segment].mIndex)) );
4279
4280    float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
4281
4282    ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f",
4283            curve[segment].mIndex, volIdx,
4284            curve[segment+1].mIndex,
4285            curve[segment].mDBAttenuation,
4286            decibels,
4287            curve[segment+1].mDBAttenuation,
4288            amplification);
4289
4290    return amplification;
4291}
4292
4293const AudioPolicyManager::VolumeCurvePoint
4294    AudioPolicyManager::sDefaultVolumeCurve[AudioPolicyManager::VOLCNT] = {
4295    {1, -49.5f}, {33, -33.5f}, {66, -17.0f}, {100, 0.0f}
4296};
4297
4298const AudioPolicyManager::VolumeCurvePoint
4299    AudioPolicyManager::sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4300    {1, -58.0f}, {20, -40.0f}, {60, -17.0f}, {100, 0.0f}
4301};
4302
4303const AudioPolicyManager::VolumeCurvePoint
4304    AudioPolicyManager::sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT] = {
4305    {1, -56.0f}, {20, -34.0f}, {60, -11.0f}, {100, 0.0f}
4306};
4307
4308const AudioPolicyManager::VolumeCurvePoint
4309    AudioPolicyManager::sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4310    {1, -55.0f}, {20, -43.0f}, {86, -12.0f}, {100, 0.0f}
4311};
4312
4313const AudioPolicyManager::VolumeCurvePoint
4314    AudioPolicyManager::sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT] = {
4315    {1, -29.7f}, {33, -20.1f}, {66, -10.2f}, {100, 0.0f}
4316};
4317
4318const AudioPolicyManager::VolumeCurvePoint
4319    AudioPolicyManager::sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4320    {1, -35.7f}, {33, -26.1f}, {66, -13.2f}, {100, 0.0f}
4321};
4322
4323// AUDIO_STREAM_SYSTEM, AUDIO_STREAM_ENFORCED_AUDIBLE and AUDIO_STREAM_DTMF volume tracks
4324// AUDIO_STREAM_RING on phones and AUDIO_STREAM_MUSIC on tablets.
4325// AUDIO_STREAM_DTMF tracks AUDIO_STREAM_VOICE_CALL while in call (See AudioService.java).
4326// The range is constrained between -24dB and -6dB over speaker and -30dB and -18dB over headset.
4327
4328const AudioPolicyManager::VolumeCurvePoint
4329    AudioPolicyManager::sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4330    {1, -24.0f}, {33, -18.0f}, {66, -12.0f}, {100, -6.0f}
4331};
4332
4333const AudioPolicyManager::VolumeCurvePoint
4334    AudioPolicyManager::sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT] = {
4335    {1, -34.0f}, {33, -24.0f}, {66, -15.0f}, {100, -6.0f}
4336};
4337
4338const AudioPolicyManager::VolumeCurvePoint
4339    AudioPolicyManager::sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT] = {
4340    {1, -30.0f}, {33, -26.0f}, {66, -22.0f}, {100, -18.0f}
4341};
4342
4343const AudioPolicyManager::VolumeCurvePoint
4344    AudioPolicyManager::sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4345    {0, -42.0f}, {33, -28.0f}, {66, -14.0f}, {100, 0.0f}
4346};
4347
4348const AudioPolicyManager::VolumeCurvePoint
4349    AudioPolicyManager::sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT] = {
4350    {0, -24.0f}, {33, -16.0f}, {66, -8.0f}, {100, 0.0f}
4351};
4352
4353const AudioPolicyManager::VolumeCurvePoint
4354            *AudioPolicyManager::sVolumeProfiles[AUDIO_STREAM_CNT]
4355                                                   [AudioPolicyManager::DEVICE_CATEGORY_CNT] = {
4356    { // AUDIO_STREAM_VOICE_CALL
4357        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4358        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4359        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4360    },
4361    { // AUDIO_STREAM_SYSTEM
4362        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4363        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4364        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4365    },
4366    { // AUDIO_STREAM_RING
4367        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4368        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4369        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4370    },
4371    { // AUDIO_STREAM_MUSIC
4372        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4373        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4374        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4375    },
4376    { // AUDIO_STREAM_ALARM
4377        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4378        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4379        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4380    },
4381    { // AUDIO_STREAM_NOTIFICATION
4382        sDefaultVolumeCurve, // DEVICE_CATEGORY_HEADSET
4383        sSpeakerSonificationVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4384        sDefaultVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4385    },
4386    { // AUDIO_STREAM_BLUETOOTH_SCO
4387        sDefaultVoiceVolumeCurve, // DEVICE_CATEGORY_HEADSET
4388        sSpeakerVoiceVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4389        sDefaultVoiceVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4390    },
4391    { // AUDIO_STREAM_ENFORCED_AUDIBLE
4392        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4393        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4394        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4395    },
4396    {  // AUDIO_STREAM_DTMF
4397        sHeadsetSystemVolumeCurve, // DEVICE_CATEGORY_HEADSET
4398        sDefaultSystemVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4399        sDefaultSystemVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4400    },
4401    { // AUDIO_STREAM_TTS
4402        sDefaultMediaVolumeCurve, // DEVICE_CATEGORY_HEADSET
4403        sSpeakerMediaVolumeCurve, // DEVICE_CATEGORY_SPEAKER
4404        sDefaultMediaVolumeCurve  // DEVICE_CATEGORY_EARPIECE
4405    },
4406};
4407
4408void AudioPolicyManager::initializeVolumeCurves()
4409{
4410    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4411        for (int j = 0; j < DEVICE_CATEGORY_CNT; j++) {
4412            mStreams[i].mVolumeCurve[j] =
4413                    sVolumeProfiles[i][j];
4414        }
4415    }
4416
4417    // Check availability of DRC on speaker path: if available, override some of the speaker curves
4418    if (mSpeakerDrcEnabled) {
4419        mStreams[AUDIO_STREAM_SYSTEM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4420                sDefaultSystemVolumeCurveDrc;
4421        mStreams[AUDIO_STREAM_RING].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4422                sSpeakerSonificationVolumeCurveDrc;
4423        mStreams[AUDIO_STREAM_ALARM].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4424                sSpeakerSonificationVolumeCurveDrc;
4425        mStreams[AUDIO_STREAM_NOTIFICATION].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4426                sSpeakerSonificationVolumeCurveDrc;
4427        mStreams[AUDIO_STREAM_MUSIC].mVolumeCurve[DEVICE_CATEGORY_SPEAKER] =
4428                sSpeakerMediaVolumeCurveDrc;
4429    }
4430}
4431
4432float AudioPolicyManager::computeVolume(audio_stream_type_t stream,
4433                                            int index,
4434                                            audio_io_handle_t output,
4435                                            audio_devices_t device)
4436{
4437    float volume = 1.0;
4438    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4439    StreamDescriptor &streamDesc = mStreams[stream];
4440
4441    if (device == AUDIO_DEVICE_NONE) {
4442        device = outputDesc->device();
4443    }
4444
4445    volume = volIndexToAmpl(device, streamDesc, index);
4446
4447    // if a headset is connected, apply the following rules to ring tones and notifications
4448    // to avoid sound level bursts in user's ears:
4449    // - always attenuate ring tones and notifications volume by 6dB
4450    // - if music is playing, always limit the volume to current music volume,
4451    // with a minimum threshold at -36dB so that notification is always perceived.
4452    const routing_strategy stream_strategy = getStrategy(stream);
4453    if ((device & (AUDIO_DEVICE_OUT_BLUETOOTH_A2DP |
4454            AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES |
4455            AUDIO_DEVICE_OUT_WIRED_HEADSET |
4456            AUDIO_DEVICE_OUT_WIRED_HEADPHONE)) &&
4457        ((stream_strategy == STRATEGY_SONIFICATION)
4458                || (stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL)
4459                || (stream == AUDIO_STREAM_SYSTEM)
4460                || ((stream_strategy == STRATEGY_ENFORCED_AUDIBLE) &&
4461                    (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) &&
4462        streamDesc.mCanBeMuted) {
4463        volume *= SONIFICATION_HEADSET_VOLUME_FACTOR;
4464        // when the phone is ringing we must consider that music could have been paused just before
4465        // by the music application and behave as if music was active if the last music track was
4466        // just stopped
4467        if (isStreamActive(AUDIO_STREAM_MUSIC, SONIFICATION_HEADSET_MUSIC_DELAY) ||
4468                mLimitRingtoneVolume) {
4469            audio_devices_t musicDevice = getDeviceForStrategy(STRATEGY_MEDIA, true /*fromCache*/);
4470            float musicVol = computeVolume(AUDIO_STREAM_MUSIC,
4471                               mStreams[AUDIO_STREAM_MUSIC].getVolumeIndex(musicDevice),
4472                               output,
4473                               musicDevice);
4474            float minVol = (musicVol > SONIFICATION_HEADSET_VOLUME_MIN) ?
4475                                musicVol : SONIFICATION_HEADSET_VOLUME_MIN;
4476            if (volume > minVol) {
4477                volume = minVol;
4478                ALOGV("computeVolume limiting volume to %f musicVol %f", minVol, musicVol);
4479            }
4480        }
4481    }
4482
4483    return volume;
4484}
4485
4486status_t AudioPolicyManager::checkAndSetVolume(audio_stream_type_t stream,
4487                                                   int index,
4488                                                   audio_io_handle_t output,
4489                                                   audio_devices_t device,
4490                                                   int delayMs,
4491                                                   bool force)
4492{
4493
4494    // do not change actual stream volume if the stream is muted
4495    if (mOutputs.valueFor(output)->mMuteCount[stream] != 0) {
4496        ALOGVV("checkAndSetVolume() stream %d muted count %d",
4497              stream, mOutputs.valueFor(output)->mMuteCount[stream]);
4498        return NO_ERROR;
4499    }
4500
4501    // do not change in call volume if bluetooth is connected and vice versa
4502    if ((stream == AUDIO_STREAM_VOICE_CALL &&
4503            mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] == AUDIO_POLICY_FORCE_BT_SCO) ||
4504        (stream == AUDIO_STREAM_BLUETOOTH_SCO &&
4505                mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION] != AUDIO_POLICY_FORCE_BT_SCO)) {
4506        ALOGV("checkAndSetVolume() cannot set stream %d volume with force use = %d for comm",
4507             stream, mForceUse[AUDIO_POLICY_FORCE_FOR_COMMUNICATION]);
4508        return INVALID_OPERATION;
4509    }
4510
4511    float volume = computeVolume(stream, index, output, device);
4512    // We actually change the volume if:
4513    // - the float value returned by computeVolume() changed
4514    // - the force flag is set
4515    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
4516            force) {
4517        mOutputs.valueFor(output)->mCurVolume[stream] = volume;
4518        ALOGVV("checkAndSetVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
4519        // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
4520        // enabled
4521        if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4522            mpClientInterface->setStreamVolume(AUDIO_STREAM_VOICE_CALL, volume, output, delayMs);
4523        }
4524        mpClientInterface->setStreamVolume(stream, volume, output, delayMs);
4525    }
4526
4527    if (stream == AUDIO_STREAM_VOICE_CALL ||
4528        stream == AUDIO_STREAM_BLUETOOTH_SCO) {
4529        float voiceVolume;
4530        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
4531        if (stream == AUDIO_STREAM_VOICE_CALL) {
4532            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
4533        } else {
4534            voiceVolume = 1.0;
4535        }
4536
4537        if (voiceVolume != mLastVoiceVolume && output == mPrimaryOutput) {
4538            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
4539            mLastVoiceVolume = voiceVolume;
4540        }
4541    }
4542
4543    return NO_ERROR;
4544}
4545
4546void AudioPolicyManager::applyStreamVolumes(audio_io_handle_t output,
4547                                                audio_devices_t device,
4548                                                int delayMs,
4549                                                bool force)
4550{
4551    ALOGVV("applyStreamVolumes() for output %d and device %x", output, device);
4552
4553    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4554        checkAndSetVolume((audio_stream_type_t)stream,
4555                          mStreams[stream].getVolumeIndex(device),
4556                          output,
4557                          device,
4558                          delayMs,
4559                          force);
4560    }
4561}
4562
4563void AudioPolicyManager::setStrategyMute(routing_strategy strategy,
4564                                             bool on,
4565                                             audio_io_handle_t output,
4566                                             int delayMs,
4567                                             audio_devices_t device)
4568{
4569    ALOGVV("setStrategyMute() strategy %d, mute %d, output %d", strategy, on, output);
4570    for (int stream = 0; stream < AUDIO_STREAM_CNT; stream++) {
4571        if (getStrategy((audio_stream_type_t)stream) == strategy) {
4572            setStreamMute((audio_stream_type_t)stream, on, output, delayMs, device);
4573        }
4574    }
4575}
4576
4577void AudioPolicyManager::setStreamMute(audio_stream_type_t stream,
4578                                           bool on,
4579                                           audio_io_handle_t output,
4580                                           int delayMs,
4581                                           audio_devices_t device)
4582{
4583    StreamDescriptor &streamDesc = mStreams[stream];
4584    sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
4585    if (device == AUDIO_DEVICE_NONE) {
4586        device = outputDesc->device();
4587    }
4588
4589    ALOGVV("setStreamMute() stream %d, mute %d, output %d, mMuteCount %d device %04x",
4590          stream, on, output, outputDesc->mMuteCount[stream], device);
4591
4592    if (on) {
4593        if (outputDesc->mMuteCount[stream] == 0) {
4594            if (streamDesc.mCanBeMuted &&
4595                    ((stream != AUDIO_STREAM_ENFORCED_AUDIBLE) ||
4596                     (mForceUse[AUDIO_POLICY_FORCE_FOR_SYSTEM] == AUDIO_POLICY_FORCE_NONE))) {
4597                checkAndSetVolume(stream, 0, output, device, delayMs);
4598            }
4599        }
4600        // increment mMuteCount after calling checkAndSetVolume() so that volume change is not ignored
4601        outputDesc->mMuteCount[stream]++;
4602    } else {
4603        if (outputDesc->mMuteCount[stream] == 0) {
4604            ALOGV("setStreamMute() unmuting non muted stream!");
4605            return;
4606        }
4607        if (--outputDesc->mMuteCount[stream] == 0) {
4608            checkAndSetVolume(stream,
4609                              streamDesc.getVolumeIndex(device),
4610                              output,
4611                              device,
4612                              delayMs);
4613        }
4614    }
4615}
4616
4617void AudioPolicyManager::handleIncallSonification(audio_stream_type_t stream,
4618                                                      bool starting, bool stateChange)
4619{
4620    // if the stream pertains to sonification strategy and we are in call we must
4621    // mute the stream if it is low visibility. If it is high visibility, we must play a tone
4622    // in the device used for phone strategy and play the tone if the selected device does not
4623    // interfere with the device used for phone strategy
4624    // if stateChange is true, we are called from setPhoneState() and we must mute or unmute as
4625    // many times as there are active tracks on the output
4626    const routing_strategy stream_strategy = getStrategy(stream);
4627    if ((stream_strategy == STRATEGY_SONIFICATION) ||
4628            ((stream_strategy == STRATEGY_SONIFICATION_RESPECTFUL))) {
4629        sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(mPrimaryOutput);
4630        ALOGV("handleIncallSonification() stream %d starting %d device %x stateChange %d",
4631                stream, starting, outputDesc->mDevice, stateChange);
4632        if (outputDesc->mRefCount[stream]) {
4633            int muteCount = 1;
4634            if (stateChange) {
4635                muteCount = outputDesc->mRefCount[stream];
4636            }
4637            if (audio_is_low_visibility(stream)) {
4638                ALOGV("handleIncallSonification() low visibility, muteCount %d", muteCount);
4639                for (int i = 0; i < muteCount; i++) {
4640                    setStreamMute(stream, starting, mPrimaryOutput);
4641                }
4642            } else {
4643                ALOGV("handleIncallSonification() high visibility");
4644                if (outputDesc->device() &
4645                        getDeviceForStrategy(STRATEGY_PHONE, true /*fromCache*/)) {
4646                    ALOGV("handleIncallSonification() high visibility muted, muteCount %d", muteCount);
4647                    for (int i = 0; i < muteCount; i++) {
4648                        setStreamMute(stream, starting, mPrimaryOutput);
4649                    }
4650                }
4651                if (starting) {
4652                    mpClientInterface->startTone(AUDIO_POLICY_TONE_IN_CALL_NOTIFICATION,
4653                                                 AUDIO_STREAM_VOICE_CALL);
4654                } else {
4655                    mpClientInterface->stopTone();
4656                }
4657            }
4658        }
4659    }
4660}
4661
4662bool AudioPolicyManager::isInCall()
4663{
4664    return isStateInCall(mPhoneState);
4665}
4666
4667bool AudioPolicyManager::isStateInCall(int state) {
4668    return ((state == AUDIO_MODE_IN_CALL) ||
4669            (state == AUDIO_MODE_IN_COMMUNICATION));
4670}
4671
4672uint32_t AudioPolicyManager::getMaxEffectsCpuLoad()
4673{
4674    return MAX_EFFECTS_CPU_LOAD;
4675}
4676
4677uint32_t AudioPolicyManager::getMaxEffectsMemory()
4678{
4679    return MAX_EFFECTS_MEMORY;
4680}
4681
4682
4683// --- AudioOutputDescriptor class implementation
4684
4685AudioPolicyManager::AudioOutputDescriptor::AudioOutputDescriptor(
4686        const sp<IOProfile>& profile)
4687    : mId(0), mIoHandle(0), mLatency(0),
4688    mFlags((audio_output_flags_t)0), mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0),
4689    mOutput1(0), mOutput2(0), mProfile(profile), mDirectOpenCount(0)
4690{
4691    // clear usage count for all stream types
4692    for (int i = 0; i < AUDIO_STREAM_CNT; i++) {
4693        mRefCount[i] = 0;
4694        mCurVolume[i] = -1.0;
4695        mMuteCount[i] = 0;
4696        mStopTime[i] = 0;
4697    }
4698    for (int i = 0; i < NUM_STRATEGIES; i++) {
4699        mStrategyMutedByDevice[i] = false;
4700    }
4701    if (profile != NULL) {
4702        mAudioPort = profile;
4703        mFlags = profile->mFlags;
4704        mSamplingRate = profile->pickSamplingRate();
4705        mFormat = profile->pickFormat();
4706        mChannelMask = profile->pickChannelMask();
4707        if (profile->mGains.size() > 0) {
4708            profile->mGains[0]->getDefaultConfig(&mGain);
4709        }
4710    }
4711}
4712
4713audio_devices_t AudioPolicyManager::AudioOutputDescriptor::device() const
4714{
4715    if (isDuplicated()) {
4716        return (audio_devices_t)(mOutput1->mDevice | mOutput2->mDevice);
4717    } else {
4718        return mDevice;
4719    }
4720}
4721
4722uint32_t AudioPolicyManager::AudioOutputDescriptor::latency()
4723{
4724    if (isDuplicated()) {
4725        return (mOutput1->mLatency > mOutput2->mLatency) ? mOutput1->mLatency : mOutput2->mLatency;
4726    } else {
4727        return mLatency;
4728    }
4729}
4730
4731bool AudioPolicyManager::AudioOutputDescriptor::sharesHwModuleWith(
4732        const sp<AudioOutputDescriptor> outputDesc)
4733{
4734    if (isDuplicated()) {
4735        return mOutput1->sharesHwModuleWith(outputDesc) || mOutput2->sharesHwModuleWith(outputDesc);
4736    } else if (outputDesc->isDuplicated()){
4737        return sharesHwModuleWith(outputDesc->mOutput1) || sharesHwModuleWith(outputDesc->mOutput2);
4738    } else {
4739        return (mProfile->mModule == outputDesc->mProfile->mModule);
4740    }
4741}
4742
4743void AudioPolicyManager::AudioOutputDescriptor::changeRefCount(audio_stream_type_t stream,
4744                                                                   int delta)
4745{
4746    // forward usage count change to attached outputs
4747    if (isDuplicated()) {
4748        mOutput1->changeRefCount(stream, delta);
4749        mOutput2->changeRefCount(stream, delta);
4750    }
4751    if ((delta + (int)mRefCount[stream]) < 0) {
4752        ALOGW("changeRefCount() invalid delta %d for stream %d, refCount %d",
4753              delta, stream, mRefCount[stream]);
4754        mRefCount[stream] = 0;
4755        return;
4756    }
4757    mRefCount[stream] += delta;
4758    ALOGV("changeRefCount() stream %d, count %d", stream, mRefCount[stream]);
4759}
4760
4761audio_devices_t AudioPolicyManager::AudioOutputDescriptor::supportedDevices()
4762{
4763    if (isDuplicated()) {
4764        return (audio_devices_t)(mOutput1->supportedDevices() | mOutput2->supportedDevices());
4765    } else {
4766        return mProfile->mSupportedDevices.types() ;
4767    }
4768}
4769
4770bool AudioPolicyManager::AudioOutputDescriptor::isActive(uint32_t inPastMs) const
4771{
4772    return isStrategyActive(NUM_STRATEGIES, inPastMs);
4773}
4774
4775bool AudioPolicyManager::AudioOutputDescriptor::isStrategyActive(routing_strategy strategy,
4776                                                                       uint32_t inPastMs,
4777                                                                       nsecs_t sysTime) const
4778{
4779    if ((sysTime == 0) && (inPastMs != 0)) {
4780        sysTime = systemTime();
4781    }
4782    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4783        if (((getStrategy((audio_stream_type_t)i) == strategy) ||
4784                (NUM_STRATEGIES == strategy)) &&
4785                isStreamActive((audio_stream_type_t)i, inPastMs, sysTime)) {
4786            return true;
4787        }
4788    }
4789    return false;
4790}
4791
4792bool AudioPolicyManager::AudioOutputDescriptor::isStreamActive(audio_stream_type_t stream,
4793                                                                       uint32_t inPastMs,
4794                                                                       nsecs_t sysTime) const
4795{
4796    if (mRefCount[stream] != 0) {
4797        return true;
4798    }
4799    if (inPastMs == 0) {
4800        return false;
4801    }
4802    if (sysTime == 0) {
4803        sysTime = systemTime();
4804    }
4805    if (ns2ms(sysTime - mStopTime[stream]) < inPastMs) {
4806        return true;
4807    }
4808    return false;
4809}
4810
4811void AudioPolicyManager::AudioOutputDescriptor::toAudioPortConfig(
4812                                                 struct audio_port_config *dstConfig,
4813                                                 const struct audio_port_config *srcConfig) const
4814{
4815    ALOG_ASSERT(!isDuplicated(), "toAudioPortConfig() called on duplicated output %d", mIoHandle);
4816
4817    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4818                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4819    if (srcConfig != NULL) {
4820        dstConfig->config_mask |= srcConfig->config_mask;
4821    }
4822    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4823
4824    dstConfig->id = mId;
4825    dstConfig->role = AUDIO_PORT_ROLE_SOURCE;
4826    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4827    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4828    dstConfig->ext.mix.handle = mIoHandle;
4829    dstConfig->ext.mix.usecase.stream = AUDIO_STREAM_DEFAULT;
4830}
4831
4832void AudioPolicyManager::AudioOutputDescriptor::toAudioPort(
4833                                                    struct audio_port *port) const
4834{
4835    ALOG_ASSERT(!isDuplicated(), "toAudioPort() called on duplicated output %d", mIoHandle);
4836    mProfile->toAudioPort(port);
4837    port->id = mId;
4838    toAudioPortConfig(&port->active_config);
4839    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4840    port->ext.mix.handle = mIoHandle;
4841    port->ext.mix.latency_class =
4842            mFlags & AUDIO_OUTPUT_FLAG_FAST ? AUDIO_LATENCY_LOW : AUDIO_LATENCY_NORMAL;
4843}
4844
4845status_t AudioPolicyManager::AudioOutputDescriptor::dump(int fd)
4846{
4847    const size_t SIZE = 256;
4848    char buffer[SIZE];
4849    String8 result;
4850
4851    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4852    result.append(buffer);
4853    snprintf(buffer, SIZE, " Format: %08x\n", mFormat);
4854    result.append(buffer);
4855    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4856    result.append(buffer);
4857    snprintf(buffer, SIZE, " Latency: %d\n", mLatency);
4858    result.append(buffer);
4859    snprintf(buffer, SIZE, " Flags %08x\n", mFlags);
4860    result.append(buffer);
4861    snprintf(buffer, SIZE, " Devices %08x\n", device());
4862    result.append(buffer);
4863    snprintf(buffer, SIZE, " Stream volume refCount muteCount\n");
4864    result.append(buffer);
4865    for (int i = 0; i < (int)AUDIO_STREAM_CNT; i++) {
4866        snprintf(buffer, SIZE, " %02d     %.03f     %02d       %02d\n",
4867                 i, mCurVolume[i], mRefCount[i], mMuteCount[i]);
4868        result.append(buffer);
4869    }
4870    write(fd, result.string(), result.size());
4871
4872    return NO_ERROR;
4873}
4874
4875// --- AudioInputDescriptor class implementation
4876
4877AudioPolicyManager::AudioInputDescriptor::AudioInputDescriptor(const sp<IOProfile>& profile)
4878    : mId(0), mIoHandle(0),
4879      mDevice(AUDIO_DEVICE_NONE), mPatchHandle(0), mRefCount(0),
4880      mInputSource(AUDIO_SOURCE_DEFAULT), mProfile(profile)
4881{
4882    if (profile != NULL) {
4883        mAudioPort = profile;
4884        mSamplingRate = profile->pickSamplingRate();
4885        mFormat = profile->pickFormat();
4886        mChannelMask = profile->pickChannelMask();
4887        if (profile->mGains.size() > 0) {
4888            profile->mGains[0]->getDefaultConfig(&mGain);
4889        }
4890    }
4891}
4892
4893void AudioPolicyManager::AudioInputDescriptor::toAudioPortConfig(
4894                                                   struct audio_port_config *dstConfig,
4895                                                   const struct audio_port_config *srcConfig) const
4896{
4897    ALOG_ASSERT(mProfile != 0,
4898                "toAudioPortConfig() called on input with null profile %d", mIoHandle);
4899    dstConfig->config_mask = AUDIO_PORT_CONFIG_SAMPLE_RATE|AUDIO_PORT_CONFIG_CHANNEL_MASK|
4900                            AUDIO_PORT_CONFIG_FORMAT|AUDIO_PORT_CONFIG_GAIN;
4901    if (srcConfig != NULL) {
4902        dstConfig->config_mask |= srcConfig->config_mask;
4903    }
4904
4905    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
4906
4907    dstConfig->id = mId;
4908    dstConfig->role = AUDIO_PORT_ROLE_SINK;
4909    dstConfig->type = AUDIO_PORT_TYPE_MIX;
4910    dstConfig->ext.mix.hw_module = mProfile->mModule->mHandle;
4911    dstConfig->ext.mix.handle = mIoHandle;
4912    dstConfig->ext.mix.usecase.source = mInputSource;
4913}
4914
4915void AudioPolicyManager::AudioInputDescriptor::toAudioPort(
4916                                                    struct audio_port *port) const
4917{
4918    ALOG_ASSERT(mProfile != 0, "toAudioPort() called on input with null profile %d", mIoHandle);
4919
4920    mProfile->toAudioPort(port);
4921    port->id = mId;
4922    toAudioPortConfig(&port->active_config);
4923    port->ext.mix.hw_module = mProfile->mModule->mHandle;
4924    port->ext.mix.handle = mIoHandle;
4925    port->ext.mix.latency_class = AUDIO_LATENCY_NORMAL;
4926}
4927
4928status_t AudioPolicyManager::AudioInputDescriptor::dump(int fd)
4929{
4930    const size_t SIZE = 256;
4931    char buffer[SIZE];
4932    String8 result;
4933
4934    snprintf(buffer, SIZE, " Sampling rate: %d\n", mSamplingRate);
4935    result.append(buffer);
4936    snprintf(buffer, SIZE, " Format: %d\n", mFormat);
4937    result.append(buffer);
4938    snprintf(buffer, SIZE, " Channels: %08x\n", mChannelMask);
4939    result.append(buffer);
4940    snprintf(buffer, SIZE, " Devices %08x\n", mDevice);
4941    result.append(buffer);
4942    snprintf(buffer, SIZE, " Ref Count %d\n", mRefCount);
4943    result.append(buffer);
4944    snprintf(buffer, SIZE, " Open Ref Count %d\n", mOpenRefCount);
4945    result.append(buffer);
4946
4947    write(fd, result.string(), result.size());
4948
4949    return NO_ERROR;
4950}
4951
4952// --- StreamDescriptor class implementation
4953
4954AudioPolicyManager::StreamDescriptor::StreamDescriptor()
4955    :   mIndexMin(0), mIndexMax(1), mCanBeMuted(true)
4956{
4957    mIndexCur.add(AUDIO_DEVICE_OUT_DEFAULT, 0);
4958}
4959
4960int AudioPolicyManager::StreamDescriptor::getVolumeIndex(audio_devices_t device)
4961{
4962    device = AudioPolicyManager::getDeviceForVolume(device);
4963    // there is always a valid entry for AUDIO_DEVICE_OUT_DEFAULT
4964    if (mIndexCur.indexOfKey(device) < 0) {
4965        device = AUDIO_DEVICE_OUT_DEFAULT;
4966    }
4967    return mIndexCur.valueFor(device);
4968}
4969
4970void AudioPolicyManager::StreamDescriptor::dump(int fd)
4971{
4972    const size_t SIZE = 256;
4973    char buffer[SIZE];
4974    String8 result;
4975
4976    snprintf(buffer, SIZE, "%s         %02d         %02d         ",
4977             mCanBeMuted ? "true " : "false", mIndexMin, mIndexMax);
4978    result.append(buffer);
4979    for (size_t i = 0; i < mIndexCur.size(); i++) {
4980        snprintf(buffer, SIZE, "%04x : %02d, ",
4981                 mIndexCur.keyAt(i),
4982                 mIndexCur.valueAt(i));
4983        result.append(buffer);
4984    }
4985    result.append("\n");
4986
4987    write(fd, result.string(), result.size());
4988}
4989
4990// --- EffectDescriptor class implementation
4991
4992status_t AudioPolicyManager::EffectDescriptor::dump(int fd)
4993{
4994    const size_t SIZE = 256;
4995    char buffer[SIZE];
4996    String8 result;
4997
4998    snprintf(buffer, SIZE, " I/O: %d\n", mIo);
4999    result.append(buffer);
5000    snprintf(buffer, SIZE, " Strategy: %d\n", mStrategy);
5001    result.append(buffer);
5002    snprintf(buffer, SIZE, " Session: %d\n", mSession);
5003    result.append(buffer);
5004    snprintf(buffer, SIZE, " Name: %s\n",  mDesc.name);
5005    result.append(buffer);
5006    snprintf(buffer, SIZE, " %s\n",  mEnabled ? "Enabled" : "Disabled");
5007    result.append(buffer);
5008    write(fd, result.string(), result.size());
5009
5010    return NO_ERROR;
5011}
5012
5013// --- HwModule class implementation
5014
5015AudioPolicyManager::HwModule::HwModule(const char *name)
5016    : mName(strndup(name, AUDIO_HARDWARE_MODULE_ID_MAX_LEN)),
5017      mHalVersion(AUDIO_DEVICE_API_VERSION_MIN), mHandle(0)
5018{
5019}
5020
5021AudioPolicyManager::HwModule::~HwModule()
5022{
5023    for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5024        mOutputProfiles[i]->mSupportedDevices.clear();
5025    }
5026    for (size_t i = 0; i < mInputProfiles.size(); i++) {
5027        mInputProfiles[i]->mSupportedDevices.clear();
5028    }
5029    free((void *)mName);
5030}
5031
5032status_t AudioPolicyManager::HwModule::loadInput(cnode *root)
5033{
5034    cnode *node = root->first_child;
5035
5036    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SINK, this);
5037
5038    while (node) {
5039        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5040            profile->loadSamplingRates((char *)node->value);
5041        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5042            profile->loadFormats((char *)node->value);
5043        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5044            profile->loadInChannels((char *)node->value);
5045        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5046            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5047                                                           mDeclaredDevices);
5048        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5049            profile->loadGains(node);
5050        }
5051        node = node->next;
5052    }
5053    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5054            "loadInput() invalid supported devices");
5055    ALOGW_IF(profile->mChannelMasks.size() == 0,
5056            "loadInput() invalid supported channel masks");
5057    ALOGW_IF(profile->mSamplingRates.size() == 0,
5058            "loadInput() invalid supported sampling rates");
5059    ALOGW_IF(profile->mFormats.size() == 0,
5060            "loadInput() invalid supported formats");
5061    if (!profile->mSupportedDevices.isEmpty() &&
5062            (profile->mChannelMasks.size() != 0) &&
5063            (profile->mSamplingRates.size() != 0) &&
5064            (profile->mFormats.size() != 0)) {
5065
5066        ALOGV("loadInput() adding input Supported Devices %04x",
5067              profile->mSupportedDevices.types());
5068
5069        mInputProfiles.add(profile);
5070        return NO_ERROR;
5071    } else {
5072        return BAD_VALUE;
5073    }
5074}
5075
5076status_t AudioPolicyManager::HwModule::loadOutput(cnode *root)
5077{
5078    cnode *node = root->first_child;
5079
5080    sp<IOProfile> profile = new IOProfile(String8(root->name), AUDIO_PORT_ROLE_SOURCE, this);
5081
5082    while (node) {
5083        if (strcmp(node->name, SAMPLING_RATES_TAG) == 0) {
5084            profile->loadSamplingRates((char *)node->value);
5085        } else if (strcmp(node->name, FORMATS_TAG) == 0) {
5086            profile->loadFormats((char *)node->value);
5087        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5088            profile->loadOutChannels((char *)node->value);
5089        } else if (strcmp(node->name, DEVICES_TAG) == 0) {
5090            profile->mSupportedDevices.loadDevicesFromName((char *)node->value,
5091                                                           mDeclaredDevices);
5092        } else if (strcmp(node->name, FLAGS_TAG) == 0) {
5093            profile->mFlags = parseFlagNames((char *)node->value);
5094        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5095            profile->loadGains(node);
5096        }
5097        node = node->next;
5098    }
5099    ALOGW_IF(profile->mSupportedDevices.isEmpty(),
5100            "loadOutput() invalid supported devices");
5101    ALOGW_IF(profile->mChannelMasks.size() == 0,
5102            "loadOutput() invalid supported channel masks");
5103    ALOGW_IF(profile->mSamplingRates.size() == 0,
5104            "loadOutput() invalid supported sampling rates");
5105    ALOGW_IF(profile->mFormats.size() == 0,
5106            "loadOutput() invalid supported formats");
5107    if (!profile->mSupportedDevices.isEmpty() &&
5108            (profile->mChannelMasks.size() != 0) &&
5109            (profile->mSamplingRates.size() != 0) &&
5110            (profile->mFormats.size() != 0)) {
5111
5112        ALOGV("loadOutput() adding output Supported Devices %04x, mFlags %04x",
5113              profile->mSupportedDevices.types(), profile->mFlags);
5114
5115        mOutputProfiles.add(profile);
5116        return NO_ERROR;
5117    } else {
5118        return BAD_VALUE;
5119    }
5120}
5121
5122status_t AudioPolicyManager::HwModule::loadDevice(cnode *root)
5123{
5124    cnode *node = root->first_child;
5125
5126    audio_devices_t type = AUDIO_DEVICE_NONE;
5127    while (node) {
5128        if (strcmp(node->name, DEVICE_TYPE) == 0) {
5129            type = parseDeviceNames((char *)node->value);
5130            break;
5131        }
5132        node = node->next;
5133    }
5134    if (type == AUDIO_DEVICE_NONE ||
5135            (!audio_is_input_device(type) && !audio_is_output_device(type))) {
5136        ALOGW("loadDevice() bad type %08x", type);
5137        return BAD_VALUE;
5138    }
5139    sp<DeviceDescriptor> deviceDesc = new DeviceDescriptor(String8(root->name), type);
5140    deviceDesc->mModule = this;
5141
5142    node = root->first_child;
5143    while (node) {
5144        if (strcmp(node->name, DEVICE_ADDRESS) == 0) {
5145            deviceDesc->mAddress = String8((char *)node->value);
5146        } else if (strcmp(node->name, CHANNELS_TAG) == 0) {
5147            if (audio_is_input_device(type)) {
5148                deviceDesc->loadInChannels((char *)node->value);
5149            } else {
5150                deviceDesc->loadOutChannels((char *)node->value);
5151            }
5152        } else if (strcmp(node->name, GAINS_TAG) == 0) {
5153            deviceDesc->loadGains(node);
5154        }
5155        node = node->next;
5156    }
5157
5158    ALOGV("loadDevice() adding device name %s type %08x address %s",
5159          deviceDesc->mName.string(), type, deviceDesc->mAddress.string());
5160
5161    mDeclaredDevices.add(deviceDesc);
5162
5163    return NO_ERROR;
5164}
5165
5166void AudioPolicyManager::HwModule::dump(int fd)
5167{
5168    const size_t SIZE = 256;
5169    char buffer[SIZE];
5170    String8 result;
5171
5172    snprintf(buffer, SIZE, "  - name: %s\n", mName);
5173    result.append(buffer);
5174    snprintf(buffer, SIZE, "  - handle: %d\n", mHandle);
5175    result.append(buffer);
5176    snprintf(buffer, SIZE, "  - version: %u.%u\n", mHalVersion >> 8, mHalVersion & 0xFF);
5177    result.append(buffer);
5178    write(fd, result.string(), result.size());
5179    if (mOutputProfiles.size()) {
5180        write(fd, "  - outputs:\n", strlen("  - outputs:\n"));
5181        for (size_t i = 0; i < mOutputProfiles.size(); i++) {
5182            snprintf(buffer, SIZE, "    output %zu:\n", i);
5183            write(fd, buffer, strlen(buffer));
5184            mOutputProfiles[i]->dump(fd);
5185        }
5186    }
5187    if (mInputProfiles.size()) {
5188        write(fd, "  - inputs:\n", strlen("  - inputs:\n"));
5189        for (size_t i = 0; i < mInputProfiles.size(); i++) {
5190            snprintf(buffer, SIZE, "    input %zu:\n", i);
5191            write(fd, buffer, strlen(buffer));
5192            mInputProfiles[i]->dump(fd);
5193        }
5194    }
5195    if (mDeclaredDevices.size()) {
5196        write(fd, "  - devices:\n", strlen("  - devices:\n"));
5197        for (size_t i = 0; i < mDeclaredDevices.size(); i++) {
5198            mDeclaredDevices[i]->dump(fd, 4, i);
5199        }
5200    }
5201}
5202
5203// --- AudioPort class implementation
5204
5205
5206AudioPolicyManager::AudioPort::AudioPort(const String8& name, audio_port_type_t type,
5207          audio_port_role_t role, const sp<HwModule>& module) :
5208    mName(name), mType(type), mRole(role), mModule(module), mFlags((audio_output_flags_t)0)
5209{
5210    mUseInChannelMask = ((type == AUDIO_PORT_TYPE_DEVICE) && (role == AUDIO_PORT_ROLE_SOURCE)) ||
5211                    ((type == AUDIO_PORT_TYPE_MIX) && (role == AUDIO_PORT_ROLE_SINK));
5212}
5213
5214void AudioPolicyManager::AudioPort::toAudioPort(struct audio_port *port) const
5215{
5216    port->role = mRole;
5217    port->type = mType;
5218    unsigned int i;
5219    for (i = 0; i < mSamplingRates.size() && i < AUDIO_PORT_MAX_SAMPLING_RATES; i++) {
5220        port->sample_rates[i] = mSamplingRates[i];
5221    }
5222    port->num_sample_rates = i;
5223    for (i = 0; i < mChannelMasks.size() && i < AUDIO_PORT_MAX_CHANNEL_MASKS; i++) {
5224        port->channel_masks[i] = mChannelMasks[i];
5225    }
5226    port->num_channel_masks = i;
5227    for (i = 0; i < mFormats.size() && i < AUDIO_PORT_MAX_FORMATS; i++) {
5228        port->formats[i] = mFormats[i];
5229    }
5230    port->num_formats = i;
5231
5232    ALOGV("AudioPort::toAudioPort() num gains %zu", mGains.size());
5233
5234    for (i = 0; i < mGains.size() && i < AUDIO_PORT_MAX_GAINS; i++) {
5235        port->gains[i] = mGains[i]->mGain;
5236    }
5237    port->num_gains = i;
5238}
5239
5240
5241void AudioPolicyManager::AudioPort::loadSamplingRates(char *name)
5242{
5243    char *str = strtok(name, "|");
5244
5245    // by convention, "0' in the first entry in mSamplingRates indicates the supported sampling
5246    // rates should be read from the output stream after it is opened for the first time
5247    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5248        mSamplingRates.add(0);
5249        return;
5250    }
5251
5252    while (str != NULL) {
5253        uint32_t rate = atoi(str);
5254        if (rate != 0) {
5255            ALOGV("loadSamplingRates() adding rate %d", rate);
5256            mSamplingRates.add(rate);
5257        }
5258        str = strtok(NULL, "|");
5259    }
5260}
5261
5262void AudioPolicyManager::AudioPort::loadFormats(char *name)
5263{
5264    char *str = strtok(name, "|");
5265
5266    // by convention, "0' in the first entry in mFormats indicates the supported formats
5267    // should be read from the output stream after it is opened for the first time
5268    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5269        mFormats.add(AUDIO_FORMAT_DEFAULT);
5270        return;
5271    }
5272
5273    while (str != NULL) {
5274        audio_format_t format = (audio_format_t)stringToEnum(sFormatNameToEnumTable,
5275                                                             ARRAY_SIZE(sFormatNameToEnumTable),
5276                                                             str);
5277        if (format != AUDIO_FORMAT_DEFAULT) {
5278            mFormats.add(format);
5279        }
5280        str = strtok(NULL, "|");
5281    }
5282}
5283
5284void AudioPolicyManager::AudioPort::loadInChannels(char *name)
5285{
5286    const char *str = strtok(name, "|");
5287
5288    ALOGV("loadInChannels() %s", name);
5289
5290    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5291        mChannelMasks.add(0);
5292        return;
5293    }
5294
5295    while (str != NULL) {
5296        audio_channel_mask_t channelMask =
5297                (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5298                                                   ARRAY_SIZE(sInChannelsNameToEnumTable),
5299                                                   str);
5300        if (channelMask != 0) {
5301            ALOGV("loadInChannels() adding channelMask %04x", channelMask);
5302            mChannelMasks.add(channelMask);
5303        }
5304        str = strtok(NULL, "|");
5305    }
5306}
5307
5308void AudioPolicyManager::AudioPort::loadOutChannels(char *name)
5309{
5310    const char *str = strtok(name, "|");
5311
5312    ALOGV("loadOutChannels() %s", name);
5313
5314    // by convention, "0' in the first entry in mChannelMasks indicates the supported channel
5315    // masks should be read from the output stream after it is opened for the first time
5316    if (str != NULL && strcmp(str, DYNAMIC_VALUE_TAG) == 0) {
5317        mChannelMasks.add(0);
5318        return;
5319    }
5320
5321    while (str != NULL) {
5322        audio_channel_mask_t channelMask =
5323                (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5324                                                   ARRAY_SIZE(sOutChannelsNameToEnumTable),
5325                                                   str);
5326        if (channelMask != 0) {
5327            mChannelMasks.add(channelMask);
5328        }
5329        str = strtok(NULL, "|");
5330    }
5331    return;
5332}
5333
5334audio_gain_mode_t AudioPolicyManager::AudioPort::loadGainMode(char *name)
5335{
5336    const char *str = strtok(name, "|");
5337
5338    ALOGV("loadGainMode() %s", name);
5339    audio_gain_mode_t mode = 0;
5340    while (str != NULL) {
5341        mode |= (audio_gain_mode_t)stringToEnum(sGainModeNameToEnumTable,
5342                                                ARRAY_SIZE(sGainModeNameToEnumTable),
5343                                                str);
5344        str = strtok(NULL, "|");
5345    }
5346    return mode;
5347}
5348
5349void AudioPolicyManager::AudioPort::loadGain(cnode *root, int index)
5350{
5351    cnode *node = root->first_child;
5352
5353    sp<AudioGain> gain = new AudioGain(index, mUseInChannelMask);
5354
5355    while (node) {
5356        if (strcmp(node->name, GAIN_MODE) == 0) {
5357            gain->mGain.mode = loadGainMode((char *)node->value);
5358        } else if (strcmp(node->name, GAIN_CHANNELS) == 0) {
5359            if (mUseInChannelMask) {
5360                gain->mGain.channel_mask =
5361                        (audio_channel_mask_t)stringToEnum(sInChannelsNameToEnumTable,
5362                                                           ARRAY_SIZE(sInChannelsNameToEnumTable),
5363                                                           (char *)node->value);
5364            } else {
5365                gain->mGain.channel_mask =
5366                        (audio_channel_mask_t)stringToEnum(sOutChannelsNameToEnumTable,
5367                                                           ARRAY_SIZE(sOutChannelsNameToEnumTable),
5368                                                           (char *)node->value);
5369            }
5370        } else if (strcmp(node->name, GAIN_MIN_VALUE) == 0) {
5371            gain->mGain.min_value = atoi((char *)node->value);
5372        } else if (strcmp(node->name, GAIN_MAX_VALUE) == 0) {
5373            gain->mGain.max_value = atoi((char *)node->value);
5374        } else if (strcmp(node->name, GAIN_DEFAULT_VALUE) == 0) {
5375            gain->mGain.default_value = atoi((char *)node->value);
5376        } else if (strcmp(node->name, GAIN_STEP_VALUE) == 0) {
5377            gain->mGain.step_value = atoi((char *)node->value);
5378        } else if (strcmp(node->name, GAIN_MIN_RAMP_MS) == 0) {
5379            gain->mGain.min_ramp_ms = atoi((char *)node->value);
5380        } else if (strcmp(node->name, GAIN_MAX_RAMP_MS) == 0) {
5381            gain->mGain.max_ramp_ms = atoi((char *)node->value);
5382        }
5383        node = node->next;
5384    }
5385
5386    ALOGV("loadGain() adding new gain mode %08x channel mask %08x min mB %d max mB %d",
5387          gain->mGain.mode, gain->mGain.channel_mask, gain->mGain.min_value, gain->mGain.max_value);
5388
5389    if (gain->mGain.mode == 0) {
5390        return;
5391    }
5392    mGains.add(gain);
5393}
5394
5395void AudioPolicyManager::AudioPort::loadGains(cnode *root)
5396{
5397    cnode *node = root->first_child;
5398    int index = 0;
5399    while (node) {
5400        ALOGV("loadGains() loading gain %s", node->name);
5401        loadGain(node, index++);
5402        node = node->next;
5403    }
5404}
5405
5406status_t AudioPolicyManager::AudioPort::checkExactSamplingRate(uint32_t samplingRate) const
5407{
5408    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5409        if (mSamplingRates[i] == samplingRate) {
5410            return NO_ERROR;
5411        }
5412    }
5413    return BAD_VALUE;
5414}
5415
5416status_t AudioPolicyManager::AudioPort::checkCompatibleSamplingRate(uint32_t samplingRate,
5417        uint32_t *updatedSamplingRate) const
5418{
5419    // Search for the closest supported sampling rate that is above (preferred)
5420    // or below (acceptable) the desired sampling rate, within a permitted ratio.
5421    // The sampling rates do not need to be sorted in ascending order.
5422    ssize_t maxBelow = -1;
5423    ssize_t minAbove = -1;
5424    uint32_t candidate;
5425    for (size_t i = 0; i < mSamplingRates.size(); i++) {
5426        candidate = mSamplingRates[i];
5427        if (candidate == samplingRate) {
5428            if (updatedSamplingRate != NULL) {
5429                *updatedSamplingRate = candidate;
5430            }
5431            return NO_ERROR;
5432        }
5433        // candidate < desired
5434        if (candidate < samplingRate) {
5435            if (maxBelow < 0 || candidate > mSamplingRates[maxBelow]) {
5436                maxBelow = i;
5437            }
5438        // candidate > desired
5439        } else {
5440            if (minAbove < 0 || candidate < mSamplingRates[minAbove]) {
5441                minAbove = i;
5442            }
5443        }
5444    }
5445    // This uses hard-coded knowledge about AudioFlinger resampling ratios.
5446    // TODO Move these assumptions out.
5447    static const uint32_t kMaxDownSampleRatio = 6;  // beyond this aliasing occurs
5448    static const uint32_t kMaxUpSampleRatio = 256;  // beyond this sample rate inaccuracies occur
5449                                                    // due to approximation by an int32_t of the
5450                                                    // phase increments
5451    // Prefer to down-sample from a higher sampling rate, as we get the desired frequency spectrum.
5452    if (minAbove >= 0) {
5453        candidate = mSamplingRates[minAbove];
5454        if (candidate / kMaxDownSampleRatio <= samplingRate) {
5455            if (updatedSamplingRate != NULL) {
5456                *updatedSamplingRate = candidate;
5457            }
5458            return NO_ERROR;
5459        }
5460    }
5461    // But if we have to up-sample from a lower sampling rate, that's OK.
5462    if (maxBelow >= 0) {
5463        candidate = mSamplingRates[maxBelow];
5464        if (candidate * kMaxUpSampleRatio >= samplingRate) {
5465            if (updatedSamplingRate != NULL) {
5466                *updatedSamplingRate = candidate;
5467            }
5468            return NO_ERROR;
5469        }
5470    }
5471    // leave updatedSamplingRate unmodified
5472    return BAD_VALUE;
5473}
5474
5475status_t AudioPolicyManager::AudioPort::checkExactChannelMask(audio_channel_mask_t channelMask) const
5476{
5477    for (size_t i = 0; i < mChannelMasks.size(); i++) {
5478        if (mChannelMasks[i] == channelMask) {
5479            return NO_ERROR;
5480        }
5481    }
5482    return BAD_VALUE;
5483}
5484
5485status_t AudioPolicyManager::AudioPort::checkCompatibleChannelMask(audio_channel_mask_t channelMask)
5486        const
5487{
5488    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5489    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5490        // FIXME Does not handle multi-channel automatic conversions yet
5491        audio_channel_mask_t supported = mChannelMasks[i];
5492        if (supported == channelMask) {
5493            return NO_ERROR;
5494        }
5495        if (isRecordThread) {
5496            // This uses hard-coded knowledge that AudioFlinger can silently down-mix and up-mix.
5497            // FIXME Abstract this out to a table.
5498            if (((supported == AUDIO_CHANNEL_IN_FRONT_BACK || supported == AUDIO_CHANNEL_IN_STEREO)
5499                    && channelMask == AUDIO_CHANNEL_IN_MONO) ||
5500                (supported == AUDIO_CHANNEL_IN_MONO && (channelMask == AUDIO_CHANNEL_IN_FRONT_BACK
5501                    || channelMask == AUDIO_CHANNEL_IN_STEREO))) {
5502                return NO_ERROR;
5503            }
5504        }
5505    }
5506    return BAD_VALUE;
5507}
5508
5509status_t AudioPolicyManager::AudioPort::checkFormat(audio_format_t format) const
5510{
5511    for (size_t i = 0; i < mFormats.size(); i ++) {
5512        if (mFormats[i] == format) {
5513            return NO_ERROR;
5514        }
5515    }
5516    return BAD_VALUE;
5517}
5518
5519
5520uint32_t AudioPolicyManager::AudioPort::pickSamplingRate() const
5521{
5522    // special case for uninitialized dynamic profile
5523    if (mSamplingRates.size() == 1 && mSamplingRates[0] == 0) {
5524        return 0;
5525    }
5526
5527    uint32_t samplingRate = 0;
5528    uint32_t maxRate = MAX_MIXER_SAMPLING_RATE;
5529
5530    // For mixed output and inputs, use max mixer sampling rates. Do not
5531    // limit sampling rate otherwise
5532    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5533            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5534            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5535        maxRate = UINT_MAX;
5536    }
5537    for (size_t i = 0; i < mSamplingRates.size(); i ++) {
5538        if ((mSamplingRates[i] > samplingRate) && (mSamplingRates[i] <= maxRate)) {
5539            samplingRate = mSamplingRates[i];
5540        }
5541    }
5542    return samplingRate;
5543}
5544
5545audio_channel_mask_t AudioPolicyManager::AudioPort::pickChannelMask() const
5546{
5547    // special case for uninitialized dynamic profile
5548    if (mChannelMasks.size() == 1 && mChannelMasks[0] == 0) {
5549        return AUDIO_CHANNEL_NONE;
5550    }
5551
5552    audio_channel_mask_t channelMask = AUDIO_CHANNEL_NONE;
5553    uint32_t channelCount = 0;
5554    uint32_t maxCount = MAX_MIXER_CHANNEL_COUNT;
5555
5556    // For mixed output and inputs, use max mixer channel count. Do not
5557    // limit channel count otherwise
5558    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5559            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5560            (mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)))) {
5561        maxCount = UINT_MAX;
5562    }
5563    for (size_t i = 0; i < mChannelMasks.size(); i ++) {
5564        uint32_t cnlCount;
5565        if (mUseInChannelMask) {
5566            cnlCount = audio_channel_count_from_in_mask(mChannelMasks[i]);
5567        } else {
5568            cnlCount = audio_channel_count_from_out_mask(mChannelMasks[i]);
5569        }
5570        if ((cnlCount > channelCount) && (cnlCount <= maxCount)) {
5571            channelMask = mChannelMasks[i];
5572        }
5573    }
5574    return channelMask;
5575}
5576
5577const audio_format_t AudioPolicyManager::AudioPort::sPcmFormatCompareTable[] = {
5578        AUDIO_FORMAT_DEFAULT,
5579        AUDIO_FORMAT_PCM_16_BIT,
5580        AUDIO_FORMAT_PCM_8_24_BIT,
5581        AUDIO_FORMAT_PCM_24_BIT_PACKED,
5582        AUDIO_FORMAT_PCM_32_BIT,
5583};
5584
5585int AudioPolicyManager::AudioPort::compareFormats(audio_format_t format1,
5586                                                  audio_format_t format2)
5587{
5588    // NOTE: AUDIO_FORMAT_INVALID is also considered not PCM and will be compared equal to any
5589    // compressed format and better than any PCM format. This is by design of pickFormat()
5590    if (!audio_is_linear_pcm(format1)) {
5591        if (!audio_is_linear_pcm(format2)) {
5592            return 0;
5593        }
5594        return 1;
5595    }
5596    if (!audio_is_linear_pcm(format2)) {
5597        return -1;
5598    }
5599
5600    int index1 = -1, index2 = -1;
5601    for (size_t i = 0;
5602            (i < ARRAY_SIZE(sPcmFormatCompareTable)) && ((index1 == -1) || (index2 == -1));
5603            i ++) {
5604        if (sPcmFormatCompareTable[i] == format1) {
5605            index1 = i;
5606        }
5607        if (sPcmFormatCompareTable[i] == format2) {
5608            index2 = i;
5609        }
5610    }
5611    // format1 not found => index1 < 0 => format2 > format1
5612    // format2 not found => index2 < 0 => format2 < format1
5613    return index1 - index2;
5614}
5615
5616audio_format_t AudioPolicyManager::AudioPort::pickFormat() const
5617{
5618    // special case for uninitialized dynamic profile
5619    if (mFormats.size() == 1 && mFormats[0] == 0) {
5620        return AUDIO_FORMAT_DEFAULT;
5621    }
5622
5623    audio_format_t format = AUDIO_FORMAT_DEFAULT;
5624    audio_format_t bestFormat = BEST_MIXER_FORMAT;
5625    // For mixed output and inputs, use best mixer output format. Do not
5626    // limit format otherwise
5627    if ((mType != AUDIO_PORT_TYPE_MIX) ||
5628            ((mRole == AUDIO_PORT_ROLE_SOURCE) &&
5629             (((mFlags & (AUDIO_OUTPUT_FLAG_DIRECT | AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD)) != 0)))) {
5630        bestFormat = AUDIO_FORMAT_INVALID;
5631    }
5632
5633    for (size_t i = 0; i < mFormats.size(); i ++) {
5634        if ((compareFormats(mFormats[i], format) > 0) &&
5635                (compareFormats(mFormats[i], bestFormat) <= 0)) {
5636            format = mFormats[i];
5637        }
5638    }
5639    return format;
5640}
5641
5642status_t AudioPolicyManager::AudioPort::checkGain(const struct audio_gain_config *gainConfig,
5643                                                  int index) const
5644{
5645    if (index < 0 || (size_t)index >= mGains.size()) {
5646        return BAD_VALUE;
5647    }
5648    return mGains[index]->checkConfig(gainConfig);
5649}
5650
5651void AudioPolicyManager::AudioPort::dump(int fd, int spaces) const
5652{
5653    const size_t SIZE = 256;
5654    char buffer[SIZE];
5655    String8 result;
5656
5657    if (mName.size() != 0) {
5658        snprintf(buffer, SIZE, "%*s- name: %s\n", spaces, "", mName.string());
5659        result.append(buffer);
5660    }
5661
5662    if (mSamplingRates.size() != 0) {
5663        snprintf(buffer, SIZE, "%*s- sampling rates: ", spaces, "");
5664        result.append(buffer);
5665        for (size_t i = 0; i < mSamplingRates.size(); i++) {
5666            if (i == 0 && mSamplingRates[i] == 0) {
5667                snprintf(buffer, SIZE, "Dynamic");
5668            } else {
5669                snprintf(buffer, SIZE, "%d", mSamplingRates[i]);
5670            }
5671            result.append(buffer);
5672            result.append(i == (mSamplingRates.size() - 1) ? "" : ", ");
5673        }
5674        result.append("\n");
5675    }
5676
5677    if (mChannelMasks.size() != 0) {
5678        snprintf(buffer, SIZE, "%*s- channel masks: ", spaces, "");
5679        result.append(buffer);
5680        for (size_t i = 0; i < mChannelMasks.size(); i++) {
5681            ALOGV("AudioPort::dump mChannelMasks %zu %08x", i, mChannelMasks[i]);
5682
5683            if (i == 0 && mChannelMasks[i] == 0) {
5684                snprintf(buffer, SIZE, "Dynamic");
5685            } else {
5686                snprintf(buffer, SIZE, "0x%04x", mChannelMasks[i]);
5687            }
5688            result.append(buffer);
5689            result.append(i == (mChannelMasks.size() - 1) ? "" : ", ");
5690        }
5691        result.append("\n");
5692    }
5693
5694    if (mFormats.size() != 0) {
5695        snprintf(buffer, SIZE, "%*s- formats: ", spaces, "");
5696        result.append(buffer);
5697        for (size_t i = 0; i < mFormats.size(); i++) {
5698            const char *formatStr = enumToString(sFormatNameToEnumTable,
5699                                                 ARRAY_SIZE(sFormatNameToEnumTable),
5700                                                 mFormats[i]);
5701            if (i == 0 && strcmp(formatStr, "") == 0) {
5702                snprintf(buffer, SIZE, "Dynamic");
5703            } else {
5704                snprintf(buffer, SIZE, "%s", formatStr);
5705            }
5706            result.append(buffer);
5707            result.append(i == (mFormats.size() - 1) ? "" : ", ");
5708        }
5709        result.append("\n");
5710    }
5711    write(fd, result.string(), result.size());
5712    if (mGains.size() != 0) {
5713        snprintf(buffer, SIZE, "%*s- gains:\n", spaces, "");
5714        write(fd, buffer, strlen(buffer) + 1);
5715        result.append(buffer);
5716        for (size_t i = 0; i < mGains.size(); i++) {
5717            mGains[i]->dump(fd, spaces + 2, i);
5718        }
5719    }
5720}
5721
5722// --- AudioGain class implementation
5723
5724AudioPolicyManager::AudioGain::AudioGain(int index, bool useInChannelMask)
5725{
5726    mIndex = index;
5727    mUseInChannelMask = useInChannelMask;
5728    memset(&mGain, 0, sizeof(struct audio_gain));
5729}
5730
5731void AudioPolicyManager::AudioGain::getDefaultConfig(struct audio_gain_config *config)
5732{
5733    config->index = mIndex;
5734    config->mode = mGain.mode;
5735    config->channel_mask = mGain.channel_mask;
5736    if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5737        config->values[0] = mGain.default_value;
5738    } else {
5739        uint32_t numValues;
5740        if (mUseInChannelMask) {
5741            numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
5742        } else {
5743            numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
5744        }
5745        for (size_t i = 0; i < numValues; i++) {
5746            config->values[i] = mGain.default_value;
5747        }
5748    }
5749    if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5750        config->ramp_duration_ms = mGain.min_ramp_ms;
5751    }
5752}
5753
5754status_t AudioPolicyManager::AudioGain::checkConfig(const struct audio_gain_config *config)
5755{
5756    if ((config->mode & ~mGain.mode) != 0) {
5757        return BAD_VALUE;
5758    }
5759    if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
5760        if ((config->values[0] < mGain.min_value) ||
5761                    (config->values[0] > mGain.max_value)) {
5762            return BAD_VALUE;
5763        }
5764    } else {
5765        if ((config->channel_mask & ~mGain.channel_mask) != 0) {
5766            return BAD_VALUE;
5767        }
5768        uint32_t numValues;
5769        if (mUseInChannelMask) {
5770            numValues = audio_channel_count_from_in_mask(config->channel_mask);
5771        } else {
5772            numValues = audio_channel_count_from_out_mask(config->channel_mask);
5773        }
5774        for (size_t i = 0; i < numValues; i++) {
5775            if ((config->values[i] < mGain.min_value) ||
5776                    (config->values[i] > mGain.max_value)) {
5777                return BAD_VALUE;
5778            }
5779        }
5780    }
5781    if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
5782        if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
5783                    (config->ramp_duration_ms > mGain.max_ramp_ms)) {
5784            return BAD_VALUE;
5785        }
5786    }
5787    return NO_ERROR;
5788}
5789
5790void AudioPolicyManager::AudioGain::dump(int fd, int spaces, int index) const
5791{
5792    const size_t SIZE = 256;
5793    char buffer[SIZE];
5794    String8 result;
5795
5796    snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
5797    result.append(buffer);
5798    snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
5799    result.append(buffer);
5800    snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
5801    result.append(buffer);
5802    snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
5803    result.append(buffer);
5804    snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
5805    result.append(buffer);
5806    snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
5807    result.append(buffer);
5808    snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
5809    result.append(buffer);
5810    snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
5811    result.append(buffer);
5812    snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
5813    result.append(buffer);
5814
5815    write(fd, result.string(), result.size());
5816}
5817
5818// --- AudioPortConfig class implementation
5819
5820AudioPolicyManager::AudioPortConfig::AudioPortConfig()
5821{
5822    mSamplingRate = 0;
5823    mChannelMask = AUDIO_CHANNEL_NONE;
5824    mFormat = AUDIO_FORMAT_INVALID;
5825    mGain.index = -1;
5826}
5827
5828status_t AudioPolicyManager::AudioPortConfig::applyAudioPortConfig(
5829                                                        const struct audio_port_config *config,
5830                                                        struct audio_port_config *backupConfig)
5831{
5832    struct audio_port_config localBackupConfig;
5833    status_t status = NO_ERROR;
5834
5835    localBackupConfig.config_mask = config->config_mask;
5836    toAudioPortConfig(&localBackupConfig);
5837
5838    if (mAudioPort == 0) {
5839        status = NO_INIT;
5840        goto exit;
5841    }
5842    if (config->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5843        status = mAudioPort->checkExactSamplingRate(config->sample_rate);
5844        if (status != NO_ERROR) {
5845            goto exit;
5846        }
5847        mSamplingRate = config->sample_rate;
5848    }
5849    if (config->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5850        status = mAudioPort->checkExactChannelMask(config->channel_mask);
5851        if (status != NO_ERROR) {
5852            goto exit;
5853        }
5854        mChannelMask = config->channel_mask;
5855    }
5856    if (config->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5857        status = mAudioPort->checkFormat(config->format);
5858        if (status != NO_ERROR) {
5859            goto exit;
5860        }
5861        mFormat = config->format;
5862    }
5863    if (config->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5864        status = mAudioPort->checkGain(&config->gain, config->gain.index);
5865        if (status != NO_ERROR) {
5866            goto exit;
5867        }
5868        mGain = config->gain;
5869    }
5870
5871exit:
5872    if (status != NO_ERROR) {
5873        applyAudioPortConfig(&localBackupConfig);
5874    }
5875    if (backupConfig != NULL) {
5876        *backupConfig = localBackupConfig;
5877    }
5878    return status;
5879}
5880
5881void AudioPolicyManager::AudioPortConfig::toAudioPortConfig(
5882                                                    struct audio_port_config *dstConfig,
5883                                                    const struct audio_port_config *srcConfig) const
5884{
5885    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE) {
5886        dstConfig->sample_rate = mSamplingRate;
5887        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_SAMPLE_RATE)) {
5888            dstConfig->sample_rate = srcConfig->sample_rate;
5889        }
5890    } else {
5891        dstConfig->sample_rate = 0;
5892    }
5893    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK) {
5894        dstConfig->channel_mask = mChannelMask;
5895        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_CHANNEL_MASK)) {
5896            dstConfig->channel_mask = srcConfig->channel_mask;
5897        }
5898    } else {
5899        dstConfig->channel_mask = AUDIO_CHANNEL_NONE;
5900    }
5901    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT) {
5902        dstConfig->format = mFormat;
5903        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_FORMAT)) {
5904            dstConfig->format = srcConfig->format;
5905        }
5906    } else {
5907        dstConfig->format = AUDIO_FORMAT_INVALID;
5908    }
5909    if (dstConfig->config_mask & AUDIO_PORT_CONFIG_GAIN) {
5910        dstConfig->gain = mGain;
5911        if ((srcConfig != NULL) && (srcConfig->config_mask & AUDIO_PORT_CONFIG_GAIN)) {
5912            dstConfig->gain = srcConfig->gain;
5913        }
5914    } else {
5915        dstConfig->gain.index = -1;
5916    }
5917    if (dstConfig->gain.index != -1) {
5918        dstConfig->config_mask |= AUDIO_PORT_CONFIG_GAIN;
5919    } else {
5920        dstConfig->config_mask &= ~AUDIO_PORT_CONFIG_GAIN;
5921    }
5922}
5923
5924// --- IOProfile class implementation
5925
5926AudioPolicyManager::IOProfile::IOProfile(const String8& name, audio_port_role_t role,
5927                                         const sp<HwModule>& module)
5928    : AudioPort(name, AUDIO_PORT_TYPE_MIX, role, module)
5929{
5930}
5931
5932AudioPolicyManager::IOProfile::~IOProfile()
5933{
5934}
5935
5936// checks if the IO profile is compatible with specified parameters.
5937// Sampling rate, format and channel mask must be specified in order to
5938// get a valid a match
5939bool AudioPolicyManager::IOProfile::isCompatibleProfile(audio_devices_t device,
5940                                                            uint32_t samplingRate,
5941                                                            uint32_t *updatedSamplingRate,
5942                                                            audio_format_t format,
5943                                                            audio_channel_mask_t channelMask,
5944                                                            audio_output_flags_t flags) const
5945{
5946    const bool isPlaybackThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SOURCE;
5947    const bool isRecordThread = mType == AUDIO_PORT_TYPE_MIX && mRole == AUDIO_PORT_ROLE_SINK;
5948    ALOG_ASSERT(isPlaybackThread != isRecordThread);
5949
5950    if ((mSupportedDevices.types() & device) != device) {
5951        return false;
5952    }
5953
5954    if (samplingRate == 0) {
5955         return false;
5956    }
5957    uint32_t myUpdatedSamplingRate = samplingRate;
5958    if (isPlaybackThread && checkExactSamplingRate(samplingRate) != NO_ERROR) {
5959         return false;
5960    }
5961    if (isRecordThread && checkCompatibleSamplingRate(samplingRate, &myUpdatedSamplingRate) !=
5962            NO_ERROR) {
5963         return false;
5964    }
5965
5966    if (!audio_is_valid_format(format) || checkFormat(format) != NO_ERROR) {
5967        return false;
5968    }
5969
5970    if (isPlaybackThread && (!audio_is_output_channel(channelMask) ||
5971            checkExactChannelMask(channelMask) != NO_ERROR)) {
5972        return false;
5973    }
5974    if (isRecordThread && (!audio_is_input_channel(channelMask) ||
5975            checkCompatibleChannelMask(channelMask) != NO_ERROR)) {
5976        return false;
5977    }
5978
5979    if (isPlaybackThread && (mFlags & flags) != flags) {
5980        return false;
5981    }
5982    // The only input flag that is allowed to be different is the fast flag.
5983    // An existing fast stream is compatible with a normal track request.
5984    // An existing normal stream is compatible with a fast track request,
5985    // but the fast request will be denied by AudioFlinger and converted to normal track.
5986    if (isRecordThread && (((audio_input_flags_t) mFlags ^ (audio_input_flags_t) flags) &
5987            ~AUDIO_INPUT_FLAG_FAST)) {
5988        return false;
5989    }
5990
5991    if (updatedSamplingRate != NULL) {
5992        *updatedSamplingRate = myUpdatedSamplingRate;
5993    }
5994    return true;
5995}
5996
5997void AudioPolicyManager::IOProfile::dump(int fd)
5998{
5999    const size_t SIZE = 256;
6000    char buffer[SIZE];
6001    String8 result;
6002
6003    AudioPort::dump(fd, 4);
6004
6005    snprintf(buffer, SIZE, "    - flags: 0x%04x\n", mFlags);
6006    result.append(buffer);
6007    snprintf(buffer, SIZE, "    - devices:\n");
6008    result.append(buffer);
6009    write(fd, result.string(), result.size());
6010    for (size_t i = 0; i < mSupportedDevices.size(); i++) {
6011        mSupportedDevices[i]->dump(fd, 6, i);
6012    }
6013}
6014
6015void AudioPolicyManager::IOProfile::log()
6016{
6017    const size_t SIZE = 256;
6018    char buffer[SIZE];
6019    String8 result;
6020
6021    ALOGV("    - sampling rates: ");
6022    for (size_t i = 0; i < mSamplingRates.size(); i++) {
6023        ALOGV("  %d", mSamplingRates[i]);
6024    }
6025
6026    ALOGV("    - channel masks: ");
6027    for (size_t i = 0; i < mChannelMasks.size(); i++) {
6028        ALOGV("  0x%04x", mChannelMasks[i]);
6029    }
6030
6031    ALOGV("    - formats: ");
6032    for (size_t i = 0; i < mFormats.size(); i++) {
6033        ALOGV("  0x%08x", mFormats[i]);
6034    }
6035
6036    ALOGV("    - devices: 0x%04x\n", mSupportedDevices.types());
6037    ALOGV("    - flags: 0x%04x\n", mFlags);
6038}
6039
6040
6041// --- DeviceDescriptor implementation
6042
6043
6044AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audio_devices_t type) :
6045                     AudioPort(name, AUDIO_PORT_TYPE_DEVICE,
6046                               audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK :
6047                                                              AUDIO_PORT_ROLE_SOURCE,
6048                             NULL),
6049                     mDeviceType(type), mAddress(""), mId(0)
6050{
6051    mAudioPort = this;
6052    if (mGains.size() > 0) {
6053        mGains[0]->getDefaultConfig(&mGain);
6054    }
6055}
6056
6057bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
6058{
6059    // Devices are considered equal if they:
6060    // - are of the same type (a device type cannot be AUDIO_DEVICE_NONE)
6061    // - have the same address or one device does not specify the address
6062    // - have the same channel mask or one device does not specify the channel mask
6063    return (mDeviceType == other->mDeviceType) &&
6064           (mAddress == "" || other->mAddress == "" || mAddress == other->mAddress) &&
6065           (mChannelMask == 0 || other->mChannelMask == 0 ||
6066                mChannelMask == other->mChannelMask);
6067}
6068
6069void AudioPolicyManager::DeviceVector::refreshTypes()
6070{
6071    mDeviceTypes = AUDIO_DEVICE_NONE;
6072    for(size_t i = 0; i < size(); i++) {
6073        mDeviceTypes |= itemAt(i)->mDeviceType;
6074    }
6075    ALOGV("DeviceVector::refreshTypes() mDeviceTypes %08x", mDeviceTypes);
6076}
6077
6078ssize_t AudioPolicyManager::DeviceVector::indexOf(const sp<DeviceDescriptor>& item) const
6079{
6080    for(size_t i = 0; i < size(); i++) {
6081        if (item->equals(itemAt(i))) {
6082            return i;
6083        }
6084    }
6085    return -1;
6086}
6087
6088ssize_t AudioPolicyManager::DeviceVector::add(const sp<DeviceDescriptor>& item)
6089{
6090    ssize_t ret = indexOf(item);
6091
6092    if (ret < 0) {
6093        ret = SortedVector::add(item);
6094        if (ret >= 0) {
6095            refreshTypes();
6096        }
6097    } else {
6098        ALOGW("DeviceVector::add device %08x already in", item->mDeviceType);
6099        ret = -1;
6100    }
6101    return ret;
6102}
6103
6104ssize_t AudioPolicyManager::DeviceVector::remove(const sp<DeviceDescriptor>& item)
6105{
6106    size_t i;
6107    ssize_t ret = indexOf(item);
6108
6109    if (ret < 0) {
6110        ALOGW("DeviceVector::remove device %08x not in", item->mDeviceType);
6111    } else {
6112        ret = SortedVector::removeAt(ret);
6113        if (ret >= 0) {
6114            refreshTypes();
6115        }
6116    }
6117    return ret;
6118}
6119
6120void AudioPolicyManager::DeviceVector::loadDevicesFromType(audio_devices_t types)
6121{
6122    DeviceVector deviceList;
6123
6124    uint32_t role_bit = AUDIO_DEVICE_BIT_IN & types;
6125    types &= ~role_bit;
6126
6127    while (types) {
6128        uint32_t i = 31 - __builtin_clz(types);
6129        uint32_t type = 1 << i;
6130        types &= ~type;
6131        add(new DeviceDescriptor(String8(""), type | role_bit));
6132    }
6133}
6134
6135void AudioPolicyManager::DeviceVector::loadDevicesFromName(char *name,
6136                                                           const DeviceVector& declaredDevices)
6137{
6138    char *devName = strtok(name, "|");
6139    while (devName != NULL) {
6140        if (strlen(devName) != 0) {
6141            audio_devices_t type = stringToEnum(sDeviceNameToEnumTable,
6142                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6143                                 devName);
6144            if (type != AUDIO_DEVICE_NONE) {
6145                add(new DeviceDescriptor(String8(""), type));
6146            } else {
6147                sp<DeviceDescriptor> deviceDesc =
6148                        declaredDevices.getDeviceFromName(String8(devName));
6149                if (deviceDesc != 0) {
6150                    add(deviceDesc);
6151                }
6152            }
6153         }
6154        devName = strtok(NULL, "|");
6155     }
6156}
6157
6158sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDevice(
6159                                                        audio_devices_t type, String8 address) const
6160{
6161    sp<DeviceDescriptor> device;
6162    for (size_t i = 0; i < size(); i++) {
6163        if (itemAt(i)->mDeviceType == type) {
6164            device = itemAt(i);
6165            if (itemAt(i)->mAddress = address) {
6166                break;
6167            }
6168        }
6169    }
6170    ALOGV("DeviceVector::getDevice() for type %d address %s found %p",
6171          type, address.string(), device.get());
6172    return device;
6173}
6174
6175sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromId(
6176                                                                    audio_port_handle_t id) const
6177{
6178    sp<DeviceDescriptor> device;
6179    for (size_t i = 0; i < size(); i++) {
6180        ALOGV("DeviceVector::getDeviceFromId(%d) itemAt(%zu)->mId %d", id, i, itemAt(i)->mId);
6181        if (itemAt(i)->mId == id) {
6182            device = itemAt(i);
6183            break;
6184        }
6185    }
6186    return device;
6187}
6188
6189AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromType(
6190                                                                        audio_devices_t type) const
6191{
6192    DeviceVector devices;
6193    for (size_t i = 0; (i < size()) && (type != AUDIO_DEVICE_NONE); i++) {
6194        if (itemAt(i)->mDeviceType & type & ~AUDIO_DEVICE_BIT_IN) {
6195            devices.add(itemAt(i));
6196            type &= ~itemAt(i)->mDeviceType;
6197            ALOGV("DeviceVector::getDevicesFromType() for type %x found %p",
6198                  itemAt(i)->mDeviceType, itemAt(i).get());
6199        }
6200    }
6201    return devices;
6202}
6203
6204AudioPolicyManager::DeviceVector AudioPolicyManager::DeviceVector::getDevicesFromTypeAddr(
6205        audio_devices_t type, String8 address) const
6206{
6207    DeviceVector devices;
6208    //ALOGV("   looking for device=%x, addr=%s", type, address.string());
6209    for (size_t i = 0; i < size(); i++) {
6210        //ALOGV("     at i=%d: device=%x, addr=%s",
6211        //        i, itemAt(i)->mDeviceType, itemAt(i)->mAddress.string());
6212        if (itemAt(i)->mDeviceType == type) {
6213            if (itemAt(i)->mAddress == address) {
6214                //ALOGV("      found matching address %s", address.string());
6215                devices.add(itemAt(i));
6216            }
6217        }
6218    }
6219    return devices;
6220}
6221
6222sp<AudioPolicyManager::DeviceDescriptor> AudioPolicyManager::DeviceVector::getDeviceFromName(
6223        const String8& name) const
6224{
6225    sp<DeviceDescriptor> device;
6226    for (size_t i = 0; i < size(); i++) {
6227        if (itemAt(i)->mName == name) {
6228            device = itemAt(i);
6229            break;
6230        }
6231    }
6232    return device;
6233}
6234
6235void AudioPolicyManager::DeviceDescriptor::toAudioPortConfig(
6236                                                    struct audio_port_config *dstConfig,
6237                                                    const struct audio_port_config *srcConfig) const
6238{
6239    dstConfig->config_mask = AUDIO_PORT_CONFIG_CHANNEL_MASK|AUDIO_PORT_CONFIG_GAIN;
6240    if (srcConfig != NULL) {
6241        dstConfig->config_mask |= srcConfig->config_mask;
6242    }
6243
6244    AudioPortConfig::toAudioPortConfig(dstConfig, srcConfig);
6245
6246    dstConfig->id = mId;
6247    dstConfig->role = audio_is_output_device(mDeviceType) ?
6248                        AUDIO_PORT_ROLE_SINK : AUDIO_PORT_ROLE_SOURCE;
6249    dstConfig->type = AUDIO_PORT_TYPE_DEVICE;
6250    dstConfig->ext.device.type = mDeviceType;
6251    dstConfig->ext.device.hw_module = mModule->mHandle;
6252    strncpy(dstConfig->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6253}
6254
6255void AudioPolicyManager::DeviceDescriptor::toAudioPort(struct audio_port *port) const
6256{
6257    ALOGV("DeviceDescriptor::toAudioPort() handle %d type %x", mId, mDeviceType);
6258    AudioPort::toAudioPort(port);
6259    port->id = mId;
6260    toAudioPortConfig(&port->active_config);
6261    port->ext.device.type = mDeviceType;
6262    port->ext.device.hw_module = mModule->mHandle;
6263    strncpy(port->ext.device.address, mAddress.string(), AUDIO_DEVICE_MAX_ADDRESS_LEN);
6264}
6265
6266status_t AudioPolicyManager::DeviceDescriptor::dump(int fd, int spaces, int index) const
6267{
6268    const size_t SIZE = 256;
6269    char buffer[SIZE];
6270    String8 result;
6271
6272    snprintf(buffer, SIZE, "%*sDevice %d:\n", spaces, "", index+1);
6273    result.append(buffer);
6274    if (mId != 0) {
6275        snprintf(buffer, SIZE, "%*s- id: %2d\n", spaces, "", mId);
6276        result.append(buffer);
6277    }
6278    snprintf(buffer, SIZE, "%*s- type: %-48s\n", spaces, "",
6279                                              enumToString(sDeviceNameToEnumTable,
6280                                                           ARRAY_SIZE(sDeviceNameToEnumTable),
6281                                                           mDeviceType));
6282    result.append(buffer);
6283    if (mAddress.size() != 0) {
6284        snprintf(buffer, SIZE, "%*s- address: %-32s\n", spaces, "", mAddress.string());
6285        result.append(buffer);
6286    }
6287    write(fd, result.string(), result.size());
6288    AudioPort::dump(fd, spaces);
6289
6290    return NO_ERROR;
6291}
6292
6293
6294// --- audio_policy.conf file parsing
6295
6296audio_output_flags_t AudioPolicyManager::parseFlagNames(char *name)
6297{
6298    uint32_t flag = 0;
6299
6300    // it is OK to cast name to non const here as we are not going to use it after
6301    // strtok() modifies it
6302    char *flagName = strtok(name, "|");
6303    while (flagName != NULL) {
6304        if (strlen(flagName) != 0) {
6305            flag |= stringToEnum(sFlagNameToEnumTable,
6306                               ARRAY_SIZE(sFlagNameToEnumTable),
6307                               flagName);
6308        }
6309        flagName = strtok(NULL, "|");
6310    }
6311    //force direct flag if offload flag is set: offloading implies a direct output stream
6312    // and all common behaviors are driven by checking only the direct flag
6313    // this should normally be set appropriately in the policy configuration file
6314    if ((flag & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
6315        flag |= AUDIO_OUTPUT_FLAG_DIRECT;
6316    }
6317
6318    return (audio_output_flags_t)flag;
6319}
6320
6321audio_devices_t AudioPolicyManager::parseDeviceNames(char *name)
6322{
6323    uint32_t device = 0;
6324
6325    char *devName = strtok(name, "|");
6326    while (devName != NULL) {
6327        if (strlen(devName) != 0) {
6328            device |= stringToEnum(sDeviceNameToEnumTable,
6329                                 ARRAY_SIZE(sDeviceNameToEnumTable),
6330                                 devName);
6331         }
6332        devName = strtok(NULL, "|");
6333     }
6334    return device;
6335}
6336
6337void AudioPolicyManager::loadHwModule(cnode *root)
6338{
6339    status_t status = NAME_NOT_FOUND;
6340    cnode *node;
6341    sp<HwModule> module = new HwModule(root->name);
6342
6343    node = config_find(root, DEVICES_TAG);
6344    if (node != NULL) {
6345        node = node->first_child;
6346        while (node) {
6347            ALOGV("loadHwModule() loading device %s", node->name);
6348            status_t tmpStatus = module->loadDevice(node);
6349            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6350                status = tmpStatus;
6351            }
6352            node = node->next;
6353        }
6354    }
6355    node = config_find(root, OUTPUTS_TAG);
6356    if (node != NULL) {
6357        node = node->first_child;
6358        while (node) {
6359            ALOGV("loadHwModule() loading output %s", node->name);
6360            status_t tmpStatus = module->loadOutput(node);
6361            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6362                status = tmpStatus;
6363            }
6364            node = node->next;
6365        }
6366    }
6367    node = config_find(root, INPUTS_TAG);
6368    if (node != NULL) {
6369        node = node->first_child;
6370        while (node) {
6371            ALOGV("loadHwModule() loading input %s", node->name);
6372            status_t tmpStatus = module->loadInput(node);
6373            if (status == NAME_NOT_FOUND || status == NO_ERROR) {
6374                status = tmpStatus;
6375            }
6376            node = node->next;
6377        }
6378    }
6379    loadGlobalConfig(root, module);
6380
6381    if (status == NO_ERROR) {
6382        mHwModules.add(module);
6383    }
6384}
6385
6386void AudioPolicyManager::loadHwModules(cnode *root)
6387{
6388    cnode *node = config_find(root, AUDIO_HW_MODULE_TAG);
6389    if (node == NULL) {
6390        return;
6391    }
6392
6393    node = node->first_child;
6394    while (node) {
6395        ALOGV("loadHwModules() loading module %s", node->name);
6396        loadHwModule(node);
6397        node = node->next;
6398    }
6399}
6400
6401void AudioPolicyManager::loadGlobalConfig(cnode *root, const sp<HwModule>& module)
6402{
6403    cnode *node = config_find(root, GLOBAL_CONFIG_TAG);
6404
6405    if (node == NULL) {
6406        return;
6407    }
6408    DeviceVector declaredDevices;
6409    if (module != NULL) {
6410        declaredDevices = module->mDeclaredDevices;
6411    }
6412
6413    node = node->first_child;
6414    while (node) {
6415        if (strcmp(ATTACHED_OUTPUT_DEVICES_TAG, node->name) == 0) {
6416            mAvailableOutputDevices.loadDevicesFromName((char *)node->value,
6417                                                        declaredDevices);
6418            ALOGV("loadGlobalConfig() Attached Output Devices %08x",
6419                  mAvailableOutputDevices.types());
6420        } else if (strcmp(DEFAULT_OUTPUT_DEVICE_TAG, node->name) == 0) {
6421            audio_devices_t device = (audio_devices_t)stringToEnum(sDeviceNameToEnumTable,
6422                                              ARRAY_SIZE(sDeviceNameToEnumTable),
6423                                              (char *)node->value);
6424            if (device != AUDIO_DEVICE_NONE) {
6425                mDefaultOutputDevice = new DeviceDescriptor(String8(""), device);
6426            } else {
6427                ALOGW("loadGlobalConfig() default device not specified");
6428            }
6429            ALOGV("loadGlobalConfig() mDefaultOutputDevice %08x", mDefaultOutputDevice->mDeviceType);
6430        } else if (strcmp(ATTACHED_INPUT_DEVICES_TAG, node->name) == 0) {
6431            mAvailableInputDevices.loadDevicesFromName((char *)node->value,
6432                                                       declaredDevices);
6433            ALOGV("loadGlobalConfig() Available InputDevices %08x", mAvailableInputDevices.types());
6434        } else if (strcmp(SPEAKER_DRC_ENABLED_TAG, node->name) == 0) {
6435            mSpeakerDrcEnabled = stringToBool((char *)node->value);
6436            ALOGV("loadGlobalConfig() mSpeakerDrcEnabled = %d", mSpeakerDrcEnabled);
6437        } else if (strcmp(AUDIO_HAL_VERSION_TAG, node->name) == 0) {
6438            uint32_t major, minor;
6439            sscanf((char *)node->value, "%u.%u", &major, &minor);
6440            module->mHalVersion = HARDWARE_DEVICE_API_VERSION(major, minor);
6441            ALOGV("loadGlobalConfig() mHalVersion = %04x major %u minor %u",
6442                  module->mHalVersion, major, minor);
6443        }
6444        node = node->next;
6445    }
6446}
6447
6448status_t AudioPolicyManager::loadAudioPolicyConfig(const char *path)
6449{
6450    cnode *root;
6451    char *data;
6452
6453    data = (char *)load_file(path, NULL);
6454    if (data == NULL) {
6455        return -ENODEV;
6456    }
6457    root = config_node("", "");
6458    config_load(root, data);
6459
6460    loadHwModules(root);
6461    // legacy audio_policy.conf files have one global_configuration section
6462    loadGlobalConfig(root, getModuleFromName(AUDIO_HARDWARE_MODULE_ID_PRIMARY));
6463    config_free(root);
6464    free(root);
6465    free(data);
6466
6467    ALOGI("loadAudioPolicyConfig() loaded %s\n", path);
6468
6469    return NO_ERROR;
6470}
6471
6472void AudioPolicyManager::defaultAudioPolicyConfig(void)
6473{
6474    sp<HwModule> module;
6475    sp<IOProfile> profile;
6476    sp<DeviceDescriptor> defaultInputDevice = new DeviceDescriptor(String8(""),
6477                                                                   AUDIO_DEVICE_IN_BUILTIN_MIC);
6478    mAvailableOutputDevices.add(mDefaultOutputDevice);
6479    mAvailableInputDevices.add(defaultInputDevice);
6480
6481    module = new HwModule("primary");
6482
6483    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SOURCE, module);
6484    profile->mSamplingRates.add(44100);
6485    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6486    profile->mChannelMasks.add(AUDIO_CHANNEL_OUT_STEREO);
6487    profile->mSupportedDevices.add(mDefaultOutputDevice);
6488    profile->mFlags = AUDIO_OUTPUT_FLAG_PRIMARY;
6489    module->mOutputProfiles.add(profile);
6490
6491    profile = new IOProfile(String8("primary"), AUDIO_PORT_ROLE_SINK, module);
6492    profile->mSamplingRates.add(8000);
6493    profile->mFormats.add(AUDIO_FORMAT_PCM_16_BIT);
6494    profile->mChannelMasks.add(AUDIO_CHANNEL_IN_MONO);
6495    profile->mSupportedDevices.add(defaultInputDevice);
6496    module->mInputProfiles.add(profile);
6497
6498    mHwModules.add(module);
6499}
6500
6501audio_stream_type_t AudioPolicyManager::streamTypefromAttributesInt(const audio_attributes_t *attr)
6502{
6503    // flags to stream type mapping
6504    if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
6505        return AUDIO_STREAM_ENFORCED_AUDIBLE;
6506    }
6507    if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
6508        return AUDIO_STREAM_BLUETOOTH_SCO;
6509    }
6510
6511    // usage to stream type mapping
6512    switch (attr->usage) {
6513    case AUDIO_USAGE_MEDIA:
6514    case AUDIO_USAGE_GAME:
6515    case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
6516    case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
6517        return AUDIO_STREAM_MUSIC;
6518    case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
6519        return AUDIO_STREAM_SYSTEM;
6520    case AUDIO_USAGE_VOICE_COMMUNICATION:
6521        return AUDIO_STREAM_VOICE_CALL;
6522
6523    case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
6524        return AUDIO_STREAM_DTMF;
6525
6526    case AUDIO_USAGE_ALARM:
6527        return AUDIO_STREAM_ALARM;
6528    case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
6529        return AUDIO_STREAM_RING;
6530
6531    case AUDIO_USAGE_NOTIFICATION:
6532    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
6533    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
6534    case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
6535    case AUDIO_USAGE_NOTIFICATION_EVENT:
6536        return AUDIO_STREAM_NOTIFICATION;
6537
6538    case AUDIO_USAGE_UNKNOWN:
6539    default:
6540        return AUDIO_STREAM_MUSIC;
6541    }
6542}
6543}; // namespace android
6544