Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 | |
Phil Burk | 71d97e9 | 2019-03-08 12:50:01 -0800 | [diff] [blame] | 17 | #include "common/OboeDebug.h" |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 18 | #include "OboeStreamCallbackProxy.h" |
| 19 | |
Phil Burk | 0f94ca1 | 2019-12-21 15:13:40 -0800 | [diff] [blame] | 20 | // Linear congruential random number generator. |
| 21 | static uint32_t s_random16() { |
| 22 | static uint32_t seed = 1234; |
| 23 | seed = ((seed * 31421) + 6927) & 0x0FFFF; |
| 24 | return seed; |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 25 | } |
| 26 | |
Phil Burk | 0f94ca1 | 2019-12-21 15:13:40 -0800 | [diff] [blame] | 27 | /** |
| 28 | * The random number generator is good for burning CPU because the compiler cannot |
| 29 | * easily optimize away the computation. |
| 30 | * @param workload number of times to execute the loop |
| 31 | * @return a white noise value between -1.0 and +1.0 |
| 32 | */ |
| 33 | static float s_burnCPU(int32_t workload) { |
| 34 | uint32_t random = 0; |
| 35 | for (int32_t i = 0; i < workload; i++) { |
| 36 | for (int32_t j = 0; j < 10; j++) { |
| 37 | random = random ^ s_random16(); |
| 38 | } |
| 39 | } |
| 40 | return (random - 32768) * (1.0 / 32768); |
| 41 | } |
| 42 | |
| 43 | bool OboeStreamCallbackProxy::mCallbackReturnStop = false; |
| 44 | |
Phil Burk | 8e03882 | 2020-02-25 15:00:59 -0800 | [diff] [blame] | 45 | int64_t OboeStreamCallbackProxy::getNanoseconds(clockid_t clockId) { |
| 46 | struct timespec time; |
| 47 | int result = clock_gettime(clockId, &time); |
| 48 | if (result < 0) { |
| 49 | return result; |
| 50 | } |
| 51 | return (time.tv_sec * 1e9) + time.tv_nsec; |
| 52 | } |
| 53 | |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 54 | oboe::DataCallbackResult OboeStreamCallbackProxy::onAudioReady( |
| 55 | oboe::AudioStream *audioStream, |
| 56 | void *audioData, |
| 57 | int numFrames) { |
Phil Burk | 8e03882 | 2020-02-25 15:00:59 -0800 | [diff] [blame] | 58 | oboe::DataCallbackResult callbackResult = oboe::DataCallbackResult::Stop; |
| 59 | int64_t startTimeNanos = getNanoseconds(); |
| 60 | |
Phil Burk | 6fb1d80 | 2018-12-21 15:28:07 -0800 | [diff] [blame] | 61 | mCallbackCount++; |
Phil Burk | 27c7271 | 2020-01-27 09:13:19 -0800 | [diff] [blame] | 62 | mFramesPerCallback = numFrames; |
| 63 | |
Phil Burk | 6fb1d80 | 2018-12-21 15:28:07 -0800 | [diff] [blame] | 64 | if (mCallbackReturnStop) { |
| 65 | return oboe::DataCallbackResult::Stop; |
| 66 | } |
Phil Burk | 0f94ca1 | 2019-12-21 15:13:40 -0800 | [diff] [blame] | 67 | |
Phil Burk | 0f94ca1 | 2019-12-21 15:13:40 -0800 | [diff] [blame] | 68 | s_burnCPU((int32_t)(mWorkload * kWorkloadScaler * numFrames)); |
| 69 | |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 70 | if (mCallback != nullptr) { |
Phil Burk | 8e03882 | 2020-02-25 15:00:59 -0800 | [diff] [blame] | 71 | callbackResult = mCallback->onAudioReady(audioStream, audioData, numFrames); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 72 | } |
Phil Burk | 8e03882 | 2020-02-25 15:00:59 -0800 | [diff] [blame] | 73 | |
| 74 | // Update CPU load |
| 75 | double calculationTime = (double)(getNanoseconds() - startTimeNanos); |
| 76 | double inverseRealTime = audioStream->getSampleRate() / (1.0e9 * numFrames); |
| 77 | double currentCpuLoad = calculationTime * inverseRealTime; // avoid a divide |
| 78 | mCpuLoad = (mCpuLoad * 0.95) + (currentCpuLoad * 0.05); // simple low pass filter |
| 79 | |
| 80 | return callbackResult; |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | void OboeStreamCallbackProxy::onErrorBeforeClose(oboe::AudioStream *audioStream, oboe::Result error) { |
Phil Burk | c572e88 | 2020-01-07 14:26:56 -0800 | [diff] [blame] | 84 | LOGD("OboeStreamCallbackProxy::%s(%p, %d) called", __func__, audioStream, error); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 85 | if (mCallback != nullptr) { |
Phil Burk | c572e88 | 2020-01-07 14:26:56 -0800 | [diff] [blame] | 86 | mCallback->onErrorBeforeClose(audioStream, error); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 87 | } |
Phil Burk | c4556cc | 2020-04-15 13:50:58 -0700 | [diff] [blame^] | 88 | usleep(2000 * 1000); // FIXME - sleep to provoke a race condition |
| 89 | LOGD("OboeStreamCallbackProxy::%s(%p, %d) returning after sleep", __func__, audioStream, error); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | void OboeStreamCallbackProxy::onErrorAfterClose(oboe::AudioStream *audioStream, oboe::Result error) { |
Phil Burk | c572e88 | 2020-01-07 14:26:56 -0800 | [diff] [blame] | 93 | |
| 94 | LOGD("OboeStreamCallbackProxy::%s(%p, %d) called", __func__, audioStream, error); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 95 | if (mCallback != nullptr) { |
Phil Burk | c572e88 | 2020-01-07 14:26:56 -0800 | [diff] [blame] | 96 | mCallback->onErrorAfterClose(audioStream, error); |
Phil Burk | 0433d8f | 2018-11-21 16:41:25 -0800 | [diff] [blame] | 97 | } |
| 98 | } |