256 lines
7.9 KiB
C++
256 lines
7.9 KiB
C++
/*
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* Copyright (C) 2006-2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "AudioSystem"
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#include <utils/Log.h>
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#include <utils/IServiceManager.h>
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#include <media/AudioSystem.h>
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#include <media/AudioTrack.h>
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#include <math.h>
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namespace android {
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// client singleton for AudioFlinger binder interface
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Mutex AudioSystem::gLock;
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sp<IAudioFlinger> AudioSystem::gAudioFlinger;
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sp<AudioSystem::DeathNotifier> AudioSystem::gDeathNotifier;
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audio_error_callback AudioSystem::gAudioErrorCallback = NULL;
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// establish binder interface to AudioFlinger service
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const sp<IAudioFlinger>& AudioSystem::get_audio_flinger()
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{
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Mutex::Autolock _l(gLock);
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if (gAudioFlinger.get() == 0) {
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sp<IServiceManager> sm = defaultServiceManager();
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sp<IBinder> binder;
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do {
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binder = sm->getService(String16("media.audio_flinger"));
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if (binder != 0)
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break;
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LOGW("AudioFlinger not published, waiting...");
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usleep(500000); // 0.5 s
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} while(true);
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if (gDeathNotifier == NULL) {
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gDeathNotifier = new DeathNotifier();
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} else {
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if (gAudioErrorCallback) {
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gAudioErrorCallback(NO_ERROR);
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}
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}
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binder->linkToDeath(gDeathNotifier);
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gAudioFlinger = interface_cast<IAudioFlinger>(binder);
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}
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LOGE_IF(gAudioFlinger==0, "no AudioFlinger!?");
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return gAudioFlinger;
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}
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// routing helper functions
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status_t AudioSystem::speakerphone(bool state) {
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uint32_t routes = state ? ROUTE_SPEAKER : ROUTE_EARPIECE;
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return setRouting(MODE_IN_CALL, routes, ROUTE_ALL);
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}
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status_t AudioSystem::isSpeakerphoneOn(bool* state) {
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uint32_t routes = 0;
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status_t s = getRouting(MODE_IN_CALL, &routes);
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*state = !!(routes & ROUTE_SPEAKER);
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return s;
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}
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status_t AudioSystem::bluetoothSco(bool state) {
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uint32_t mask = ROUTE_BLUETOOTH;
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uint32_t routes = state ? mask : ROUTE_EARPIECE;
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return setRouting(MODE_IN_CALL, routes, ROUTE_ALL);
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}
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status_t AudioSystem::isBluetoothScoOn(bool* state) {
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uint32_t routes = 0;
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status_t s = getRouting(MODE_IN_CALL, &routes);
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*state = !!(routes & ROUTE_BLUETOOTH);
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return s;
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}
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status_t AudioSystem::muteMicrophone(bool state) {
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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return af->setMicMute(state);
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}
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status_t AudioSystem::isMicrophoneMuted(bool* state) {
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*state = af->getMicMute();
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return NO_ERROR;
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}
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status_t AudioSystem::setMasterVolume(float value)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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af->setMasterVolume(value);
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return NO_ERROR;
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}
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status_t AudioSystem::setMasterMute(bool mute)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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af->setMasterMute(mute);
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return NO_ERROR;
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}
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status_t AudioSystem::getMasterVolume(float* volume)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*volume = af->masterVolume();
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return NO_ERROR;
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}
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status_t AudioSystem::getMasterMute(bool* mute)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*mute = af->masterMute();
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return NO_ERROR;
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}
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status_t AudioSystem::setStreamVolume(int stream, float value)
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{
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if (uint32_t(stream) >= AudioTrack::NUM_STREAM_TYPES) return BAD_VALUE;
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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af->setStreamVolume(stream, value);
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return NO_ERROR;
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}
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status_t AudioSystem::setStreamMute(int stream, bool mute)
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{
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if (uint32_t(stream) >= AudioTrack::NUM_STREAM_TYPES) return BAD_VALUE;
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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af->setStreamMute(stream, mute);
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return NO_ERROR;
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}
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status_t AudioSystem::getStreamVolume(int stream, float* volume)
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{
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if (uint32_t(stream) >= AudioTrack::NUM_STREAM_TYPES) return BAD_VALUE;
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*volume = af->streamVolume(stream);
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return NO_ERROR;
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}
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status_t AudioSystem::getStreamMute(int stream, bool* mute)
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{
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if (uint32_t(stream) >= AudioTrack::NUM_STREAM_TYPES) return BAD_VALUE;
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*mute = af->streamMute(stream);
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return NO_ERROR;
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}
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status_t AudioSystem::setMode(int mode)
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{
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if (mode >= NUM_MODES) return BAD_VALUE;
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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return af->setMode(mode);
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}
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status_t AudioSystem::getMode(int* mode)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*mode = af->getMode();
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return NO_ERROR;
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}
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status_t AudioSystem::setRouting(int mode, uint32_t routes, uint32_t mask)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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return af->setRouting(mode, routes, mask);
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}
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status_t AudioSystem::getRouting(int mode, uint32_t* routes)
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{
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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uint32_t r = af->getRouting(mode);
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*routes = r;
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return NO_ERROR;
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}
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status_t AudioSystem::isMusicActive(bool* state) {
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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*state = af->isMusicActive();
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return NO_ERROR;
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}
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// Temporary interface, do not use
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// TODO: Replace with a more generic key:value get/set mechanism
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status_t AudioSystem::setParameter(const char* key, const char* value) {
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const sp<IAudioFlinger>& af = AudioSystem::get_audio_flinger();
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if (af == 0) return PERMISSION_DENIED;
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return af->setParameter(key, value);
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}
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// convert volume steps to natural log scale
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// change this value to change volume scaling
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static const float dBPerStep = 0.5f;
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// shouldn't need to touch these
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static const float dBConvert = -dBPerStep * 2.302585093f / 20.0f;
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static const float dBConvertInverse = 1.0f / dBConvert;
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float AudioSystem::linearToLog(int volume)
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{
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// float v = volume ? exp(float(100 - volume) * dBConvert) : 0;
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// LOGD("linearToLog(%d)=%f", volume, v);
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// return v;
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return volume ? exp(float(100 - volume) * dBConvert) : 0;
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}
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int AudioSystem::logToLinear(float volume)
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{
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// int v = volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
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// LOGD("logTolinear(%d)=%f", v, volume);
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// return v;
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return volume ? 100 - int(dBConvertInverse * log(volume) + 0.5) : 0;
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}
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// ---------------------------------------------------------------------------
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void AudioSystem::DeathNotifier::binderDied(const wp<IBinder>& who) {
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Mutex::Autolock _l(AudioSystem::gLock);
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AudioSystem::gAudioFlinger.clear();
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if (gAudioErrorCallback) {
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gAudioErrorCallback(DEAD_OBJECT);
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}
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LOGW("AudioFlinger server died!");
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}
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void AudioSystem::setErrorCallback(audio_error_callback cb) {
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Mutex::Autolock _l(AudioSystem::gLock);
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gAudioErrorCallback = cb;
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}
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}; // namespace android
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