1/* 2 * Copyright (C) 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 17#define LOG_TAG "AAudioService" 18//#define LOG_NDEBUG 0 19#include <utils/Log.h> 20 21#include <assert.h> 22#include <map> 23#include <mutex> 24#include <utils/Singleton.h> 25 26#include "AAudioEndpointManager.h" 27#include "AAudioServiceEndpoint.h" 28 29#include "core/AudioStreamBuilder.h" 30#include "AAudioServiceEndpoint.h" 31#include "AAudioServiceStreamShared.h" 32#include "AAudioServiceEndpointCapture.h" 33 34using namespace android; // TODO just import names needed 35using namespace aaudio; // TODO just import names needed 36 37AAudioServiceEndpointCapture::AAudioServiceEndpointCapture(AAudioService &audioService) 38 : mStreamInternalCapture(audioService, true) { 39} 40 41AAudioServiceEndpointCapture::~AAudioServiceEndpointCapture() { 42 delete mDistributionBuffer; 43} 44 45aaudio_result_t AAudioServiceEndpointCapture::open(int32_t deviceId) { 46 aaudio_result_t result = AAudioServiceEndpoint::open(deviceId); 47 if (result == AAUDIO_OK) { 48 delete mDistributionBuffer; 49 int distributionBufferSizeBytes = getStreamInternal()->getFramesPerBurst() 50 * getStreamInternal()->getBytesPerFrame(); 51 mDistributionBuffer = new uint8_t[distributionBufferSizeBytes]; 52 } 53 return result; 54} 55 56// Read data from the shared MMAP stream and then distribute it to the client streams. 57void *AAudioServiceEndpointCapture::callbackLoop() { 58 ALOGD("AAudioServiceEndpointCapture(): callbackLoop() entering"); 59 int32_t underflowCount = 0; 60 61 aaudio_result_t result = getStreamInternal()->requestStart(); 62 63 int64_t timeoutNanos = getStreamInternal()->calculateReasonableTimeout(); 64 65 // result might be a frame count 66 while (mCallbackEnabled.load() && getStreamInternal()->isActive() && (result >= 0)) { 67 // Read audio data from stream using a blocking read. 68 result = getStreamInternal()->read(mDistributionBuffer, getFramesPerBurst(), timeoutNanos); 69 if (result == AAUDIO_ERROR_DISCONNECTED) { 70 disconnectRegisteredStreams(); 71 break; 72 } else if (result != getFramesPerBurst()) { 73 ALOGW("AAudioServiceEndpointCapture(): callbackLoop() read %d / %d", 74 result, getFramesPerBurst()); 75 break; 76 } 77 78 // Distribute data to each active stream. 79 { // use lock guard 80 std::lock_guard <std::mutex> lock(mLockStreams); 81 for (AAudioServiceStreamShared *sharedStream : mRunningStreams) { 82 FifoBuffer *fifo = sharedStream->getDataFifoBuffer(); 83 if (fifo->getFifoControllerBase()->getEmptyFramesAvailable() < 84 getFramesPerBurst()) { 85 underflowCount++; 86 } else { 87 fifo->write(mDistributionBuffer, getFramesPerBurst()); 88 } 89 sharedStream->markTransferTime(AudioClock::getNanoseconds()); 90 } 91 } 92 } 93 94 result = getStreamInternal()->requestStop(); 95 96 ALOGD("AAudioServiceEndpointCapture(): callbackLoop() exiting, %d underflows", underflowCount); 97 return NULL; // TODO review 98} 99