Keun young Park | 4bbb5d7 | 2012-03-26 18:31:29 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| 5 | * use this file except in compliance with the License. You may obtain a copy of |
| 6 | * 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, WITHOUT |
| 12 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 13 | * License for the specific language governing permissions and limitations under |
| 14 | * the License. |
| 15 | */ |
| 16 | #include <Log.h> |
| 17 | #include "audio/Buffer.h" |
| 18 | #include "audio/AudioLocal.h" |
| 19 | |
| 20 | bool AudioLocal::prepare(AudioHardware::SamplingRate samplingRate, int gain, int /*mode*/) |
| 21 | { |
| 22 | LOGV("prepare"); |
| 23 | // gain control not necessary in MobilePre as there is no control. |
| 24 | // This means audio source itself should be adjusted to control volume |
| 25 | if (mState == EStNone) { |
| 26 | if (run() != android::NO_ERROR) { |
| 27 | LOGE("AudioLocal cannot run"); |
| 28 | // cannot run thread |
| 29 | return false; |
| 30 | } |
| 31 | mState = EStCreated; |
| 32 | } else if (mState == EStRunning) { |
| 33 | // wrong usage. first stop! |
| 34 | return false; |
| 35 | } |
| 36 | mClientCompletionWait.tryWait(); // this will reset semaphore to 0 if it is 1. |
| 37 | mSamplingRate = samplingRate; |
| 38 | return issueCommandAndWaitForCompletion(ECmInitialize); |
| 39 | } |
| 40 | |
| 41 | bool AudioLocal::startPlaybackOrRecord(android::sp<Buffer>& buffer, int numberRepetition) |
| 42 | { |
| 43 | LOGV("startPlaybackOrRecord"); |
| 44 | if (mState != EStInitialized) { |
| 45 | LOGE("startPlaybackOrRecord while not initialized"); |
| 46 | // wrong state |
| 47 | return false; |
| 48 | } |
| 49 | mBuffer = buffer; |
| 50 | mNumberRepetition = numberRepetition; |
| 51 | mCurrentRepeat = 0; |
| 52 | return issueCommandAndWaitForCompletion(ECmRun); |
| 53 | } |
| 54 | |
| 55 | bool AudioLocal::waitForCompletion() |
| 56 | { |
| 57 | int waitTimeInMsec = mBuffer->getSamples() / (mSamplingRate/1000); |
| 58 | waitTimeInMsec += COMMAND_WAIT_TIME_MSEC; |
| 59 | LOGD("waitForCompletion will wait for %d", waitTimeInMsec); |
| 60 | if (!mClientCompletionWait.timedWait(waitTimeInMsec)) { |
| 61 | LOGE("waitForCompletion time-out"); |
| 62 | return false; |
| 63 | } |
| 64 | return mCompletionResult; |
| 65 | } |
| 66 | |
| 67 | void AudioLocal::stopPlaybackOrRecord() |
| 68 | { |
| 69 | LOGV("stopPlaybackOrRecord"); |
| 70 | if (mState == EStRunning) { |
| 71 | issueCommandAndWaitForCompletion(ECmStop); |
| 72 | } |
| 73 | |
| 74 | if (mState != EStNone) { // thread alive |
| 75 | requestExit(); |
| 76 | mCurrentCommand = ECmThreadStop; |
| 77 | mAudioThreadWait.post(); |
| 78 | requestExitAndWait(); |
| 79 | mState = EStNone; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | bool AudioLocal::issueCommandAndWaitForCompletion(AudioCommand command) |
| 84 | { |
| 85 | mCurrentCommand = command; |
| 86 | mAudioThreadWait.post(); |
| 87 | if (!mClientCommandWait.timedWait(COMMAND_WAIT_TIME_MSEC)) { |
| 88 | LOGE("issueCommandAndWaitForCompletion timeout cmd %d", command); |
| 89 | return false; |
| 90 | } |
| 91 | return mCommandResult; |
| 92 | } |
| 93 | |
| 94 | AudioLocal::~AudioLocal() |
| 95 | { |
| 96 | LOGV("~AudioLocal"); |
| 97 | } |
| 98 | |
| 99 | AudioLocal::AudioLocal() |
| 100 | : mState(EStNone), |
| 101 | mCurrentCommand(ECmNone), |
| 102 | mClientCommandWait(0), |
| 103 | mClientCompletionWait(0), |
| 104 | mAudioThreadWait(0), |
| 105 | mCompletionResult(false) |
| 106 | { |
| 107 | LOGV("AudioLocal"); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | bool AudioLocal::threadLoop() |
| 112 | { |
| 113 | if (mCurrentCommand == ECmNone) { |
| 114 | if (mState == EStRunning) { |
| 115 | if (doPlaybackOrRecord(mBuffer)) { |
| 116 | // check exit condition |
| 117 | if (mBuffer->bufferHandled()) { |
| 118 | mCurrentRepeat++; |
| 119 | LOGV("repeat %d - %d", mCurrentRepeat, mNumberRepetition); |
| 120 | if (mCurrentRepeat == mNumberRepetition) { |
| 121 | LOGV("AudioLocal complete command"); |
| 122 | mState = EStInitialized; |
| 123 | mCompletionResult = true; |
| 124 | mClientCompletionWait.post(); |
| 125 | } else { |
| 126 | mBuffer->restart(); |
| 127 | } |
| 128 | } |
| 129 | } else { |
| 130 | mState = EStInitialized; |
| 131 | //notify error |
| 132 | mCompletionResult = false; |
| 133 | mClientCompletionWait.post(); |
| 134 | } |
| 135 | return true; |
| 136 | } |
| 137 | //LOGV("audio thread waiting"); |
| 138 | mAudioThreadWait.wait(); |
| 139 | //LOGV("audio thread waken up"); |
| 140 | if (mCurrentCommand == ECmNone) { |
| 141 | return true; // continue to check exit condition |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | int pendingCommand = mCurrentCommand; |
| 146 | // now there is a command |
| 147 | switch (pendingCommand) { |
| 148 | case ECmInitialize: |
| 149 | mCommandResult = doPrepare(mSamplingRate, AudioHardware::SAMPLES_PER_ONE_GO); |
| 150 | if (mCommandResult) { |
| 151 | mState = EStInitialized; |
| 152 | } |
| 153 | break; |
| 154 | case ECmRun: { |
| 155 | mCommandResult = doPlaybackOrRecord(mBuffer); |
| 156 | if (mCommandResult) { |
| 157 | mState = EStRunning; |
| 158 | } |
| 159 | } |
| 160 | break; |
| 161 | case ECmStop: |
| 162 | doStop(); |
| 163 | mState = EStCreated; |
| 164 | mCommandResult = true; |
| 165 | break; |
| 166 | case ECmThreadStop: |
| 167 | return false; |
| 168 | break; |
| 169 | default: |
| 170 | // this should not happen |
| 171 | ASSERT(false); |
| 172 | break; |
| 173 | } |
| 174 | |
| 175 | mCurrentCommand = ECmNone; |
| 176 | mClientCommandWait.post(); |
| 177 | |
| 178 | return true; |
| 179 | } |
| 180 | |
| 181 | |