Glenn Kasten | f91df1b | 2014-03-13 14:59:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 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 "FastCapture" |
| 18 | //#define LOG_NDEBUG 0 |
| 19 | |
| 20 | #define ATRACE_TAG ATRACE_TAG_AUDIO |
| 21 | |
| 22 | #include "Configuration.h" |
| 23 | #include <linux/futex.h> |
| 24 | #include <sys/syscall.h> |
| 25 | #include <media/AudioBufferProvider.h> |
| 26 | #include <utils/Log.h> |
| 27 | #include <utils/Trace.h> |
| 28 | #include "FastCapture.h" |
| 29 | |
| 30 | namespace android { |
| 31 | |
| 32 | /*static*/ const FastCaptureState FastCapture::initial; |
| 33 | |
| 34 | FastCapture::FastCapture() : FastThread(), |
| 35 | inputSource(NULL), inputSourceGen(0), pipeSink(NULL), pipeSinkGen(0), |
| 36 | readBuffer(NULL), readBufferState(-1), format(Format_Invalid), sampleRate(0), |
| 37 | // dummyDumpState |
| 38 | totalNativeFramesRead(0) |
| 39 | { |
| 40 | previous = &initial; |
| 41 | current = &initial; |
| 42 | |
| 43 | mDummyDumpState = &dummyDumpState; |
| 44 | } |
| 45 | |
| 46 | FastCapture::~FastCapture() |
| 47 | { |
| 48 | } |
| 49 | |
| 50 | FastCaptureStateQueue* FastCapture::sq() |
| 51 | { |
| 52 | return &mSQ; |
| 53 | } |
| 54 | |
| 55 | const FastThreadState *FastCapture::poll() |
| 56 | { |
| 57 | return mSQ.poll(); |
| 58 | } |
| 59 | |
| 60 | void FastCapture::setLog(NBLog::Writer *logWriter __unused) |
| 61 | { |
| 62 | } |
| 63 | |
| 64 | void FastCapture::onIdle() |
| 65 | { |
| 66 | preIdle = *(const FastCaptureState *)current; |
| 67 | current = &preIdle; |
| 68 | } |
| 69 | |
| 70 | void FastCapture::onExit() |
| 71 | { |
| 72 | delete[] readBuffer; |
| 73 | } |
| 74 | |
| 75 | bool FastCapture::isSubClassCommand(FastThreadState::Command command) |
| 76 | { |
| 77 | switch ((FastCaptureState::Command) command) { |
| 78 | case FastCaptureState::READ: |
| 79 | case FastCaptureState::WRITE: |
| 80 | case FastCaptureState::READ_WRITE: |
| 81 | return true; |
| 82 | default: |
| 83 | return false; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | void FastCapture::onStateChange() |
| 88 | { |
| 89 | const FastCaptureState * const current = (const FastCaptureState *) this->current; |
| 90 | const FastCaptureState * const previous = (const FastCaptureState *) this->previous; |
| 91 | FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) this->dumpState; |
| 92 | const size_t frameCount = current->mFrameCount; |
| 93 | |
| 94 | bool eitherChanged = false; |
| 95 | |
| 96 | // check for change in input HAL configuration |
| 97 | NBAIO_Format previousFormat = format; |
| 98 | if (current->mInputSourceGen != inputSourceGen) { |
| 99 | inputSource = current->mInputSource; |
| 100 | inputSourceGen = current->mInputSourceGen; |
| 101 | if (inputSource == NULL) { |
| 102 | format = Format_Invalid; |
| 103 | sampleRate = 0; |
| 104 | } else { |
| 105 | format = inputSource->format(); |
| 106 | sampleRate = Format_sampleRate(format); |
| 107 | unsigned channelCount = Format_channelCount(format); |
| 108 | ALOG_ASSERT(channelCount == 1 || channelCount == 2); |
| 109 | } |
| 110 | dumpState->mSampleRate = sampleRate; |
| 111 | eitherChanged = true; |
| 112 | } |
| 113 | |
| 114 | // check for change in pipe |
| 115 | if (current->mPipeSinkGen != pipeSinkGen) { |
| 116 | pipeSink = current->mPipeSink; |
| 117 | pipeSinkGen = current->mPipeSinkGen; |
| 118 | eitherChanged = true; |
| 119 | } |
| 120 | |
| 121 | // input source and pipe sink must be compatible |
| 122 | if (eitherChanged && inputSource != NULL && pipeSink != NULL) { |
| 123 | ALOG_ASSERT(Format_isEqual(format, pipeSink->format())); |
| 124 | } |
| 125 | |
| 126 | if ((!Format_isEqual(format, previousFormat)) || (frameCount != previous->mFrameCount)) { |
| 127 | // FIXME to avoid priority inversion, don't delete here |
| 128 | delete[] readBuffer; |
| 129 | readBuffer = NULL; |
| 130 | if (frameCount > 0 && sampleRate > 0) { |
| 131 | // FIXME new may block for unbounded time at internal mutex of the heap |
| 132 | // implementation; it would be better to have normal capture thread allocate for |
| 133 | // us to avoid blocking here and to prevent possible priority inversion |
| 134 | unsigned channelCount = Format_channelCount(format); |
| 135 | // FIXME frameSize |
| 136 | readBuffer = new short[frameCount * channelCount]; |
| 137 | periodNs = (frameCount * 1000000000LL) / sampleRate; // 1.00 |
| 138 | underrunNs = (frameCount * 1750000000LL) / sampleRate; // 1.75 |
| 139 | overrunNs = (frameCount * 500000000LL) / sampleRate; // 0.50 |
| 140 | forceNs = (frameCount * 950000000LL) / sampleRate; // 0.95 |
| 141 | warmupNs = (frameCount * 500000000LL) / sampleRate; // 0.50 |
| 142 | } else { |
| 143 | periodNs = 0; |
| 144 | underrunNs = 0; |
| 145 | overrunNs = 0; |
| 146 | forceNs = 0; |
| 147 | warmupNs = 0; |
| 148 | } |
| 149 | readBufferState = -1; |
| 150 | dumpState->mFrameCount = frameCount; |
| 151 | } |
| 152 | |
| 153 | } |
| 154 | |
| 155 | void FastCapture::onWork() |
| 156 | { |
| 157 | const FastCaptureState * const current = (const FastCaptureState *) this->current; |
| 158 | FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) this->dumpState; |
| 159 | const FastCaptureState::Command command = this->command; |
| 160 | const size_t frameCount = current->mFrameCount; |
| 161 | |
| 162 | if ((command & FastCaptureState::READ) /*&& isWarm*/) { |
| 163 | ALOG_ASSERT(inputSource != NULL); |
| 164 | ALOG_ASSERT(readBuffer != NULL); |
| 165 | dumpState->mReadSequence++; |
| 166 | ATRACE_BEGIN("read"); |
| 167 | ssize_t framesRead = inputSource->read(readBuffer, frameCount, |
| 168 | AudioBufferProvider::kInvalidPTS); |
| 169 | ATRACE_END(); |
| 170 | dumpState->mReadSequence++; |
| 171 | if (framesRead >= 0) { |
| 172 | LOG_ALWAYS_FATAL_IF((size_t) framesRead > frameCount); |
| 173 | totalNativeFramesRead += framesRead; |
| 174 | dumpState->mFramesRead = totalNativeFramesRead; |
| 175 | readBufferState = framesRead; |
| 176 | } else { |
| 177 | dumpState->mReadErrors++; |
| 178 | readBufferState = 0; |
| 179 | } |
| 180 | // FIXME rename to attemptedIO |
| 181 | attemptedWrite = true; |
| 182 | } |
| 183 | |
| 184 | if (command & FastCaptureState::WRITE) { |
| 185 | ALOG_ASSERT(pipeSink != NULL); |
| 186 | ALOG_ASSERT(readBuffer != NULL); |
| 187 | if (readBufferState < 0) { |
| 188 | unsigned channelCount = Format_channelCount(format); |
| 189 | // FIXME frameSize |
| 190 | memset(readBuffer, 0, frameCount * channelCount * sizeof(short)); |
| 191 | readBufferState = frameCount; |
| 192 | } |
| 193 | if (readBufferState > 0) { |
| 194 | ssize_t framesWritten = pipeSink->write(readBuffer, readBufferState); |
| 195 | // FIXME This supports at most one fast capture client. |
| 196 | // To handle multiple clients this could be converted to an array, |
| 197 | // or with a lot more work the control block could be shared by all clients. |
| 198 | audio_track_cblk_t* cblk = current->mCblk; |
| 199 | if (cblk != NULL && framesWritten > 0) { |
| 200 | int32_t rear = cblk->u.mStreaming.mRear; |
| 201 | android_atomic_release_store(framesWritten + rear, &cblk->u.mStreaming.mRear); |
| 202 | cblk->mServer += framesWritten; |
| 203 | int32_t old = android_atomic_or(CBLK_FUTEX_WAKE, &cblk->mFutex); |
| 204 | if (!(old & CBLK_FUTEX_WAKE)) { |
| 205 | // client is never in server process, so don't use FUTEX_WAKE_PRIVATE |
| 206 | (void) syscall(__NR_futex, &cblk->mFutex, FUTEX_WAKE, 1); |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
Glenn Kasten | f91df1b | 2014-03-13 14:59:31 -0700 | [diff] [blame] | 213 | } // namespace android |