blob: c7d9b8ef4a2c92fb4b68c6b385c53f5d841e0e07 [file] [log] [blame]
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "AAudioService"
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <assert.h>
#include <map>
#include <mutex>
#include <utils/Singleton.h>
#include "AAudioEndpointManager.h"
#include "AAudioServiceEndpoint.h"
#include "core/AudioStreamBuilder.h"
#include "AAudioServiceEndpoint.h"
#include "AAudioServiceStreamShared.h"
#include "AAudioServiceEndpointCapture.h"
#include "AAudioServiceEndpointShared.h"
using namespace android; // TODO just import names needed
using namespace aaudio; // TODO just import names needed
AAudioServiceEndpointCapture::AAudioServiceEndpointCapture(AAudioService &audioService)
: mStreamInternalCapture(audioService, true) {
mStreamInternal = &mStreamInternalCapture;
}
AAudioServiceEndpointCapture::~AAudioServiceEndpointCapture() {
delete mDistributionBuffer;
}
aaudio_result_t AAudioServiceEndpointCapture::open(const aaudio::AAudioStreamRequest &request) {
aaudio_result_t result = AAudioServiceEndpointShared::open(request);
if (result == AAUDIO_OK) {
delete mDistributionBuffer;
int distributionBufferSizeBytes = getStreamInternal()->getFramesPerBurst()
* getStreamInternal()->getBytesPerFrame();
mDistributionBuffer = new uint8_t[distributionBufferSizeBytes];
}
return result;
}
// Read data from the shared MMAP stream and then distribute it to the client streams.
void *AAudioServiceEndpointCapture::callbackLoop() {
ALOGD("AAudioServiceEndpointCapture(): callbackLoop() entering");
int32_t underflowCount = 0;
aaudio_result_t result = AAUDIO_OK;
int64_t timeoutNanos = getStreamInternal()->calculateReasonableTimeout();
// result might be a frame count
while (mCallbackEnabled.load() && getStreamInternal()->isActive() && (result >= 0)) {
int64_t mmapFramesRead = getStreamInternal()->getFramesRead();
// Read audio data from stream using a blocking read.
result = getStreamInternal()->read(mDistributionBuffer, getFramesPerBurst(), timeoutNanos);
if (result == AAUDIO_ERROR_DISCONNECTED) {
disconnectRegisteredStreams();
break;
} else if (result != getFramesPerBurst()) {
ALOGW("AAudioServiceEndpointCapture(): callbackLoop() read %d / %d",
result, getFramesPerBurst());
break;
}
// Distribute data to each active stream.
{ // brackets are for lock_guard
std::lock_guard <std::mutex> lock(mLockStreams);
for (const auto clientStream : mRegisteredStreams) {
if (clientStream->isRunning()) {
int64_t clientFramesWritten = 0;
sp<AAudioServiceStreamShared> streamShared =
static_cast<AAudioServiceStreamShared *>(clientStream.get());
{
// Lock the AudioFifo to protect against close.
std::lock_guard <std::mutex> lock(streamShared->getAudioDataQueueLock());
FifoBuffer *fifo = streamShared->getAudioDataFifoBuffer_l();
if (fifo != nullptr) {
// Determine offset between framePosition in client's stream
// vs the underlying MMAP stream.
clientFramesWritten = fifo->getWriteCounter();
// There are two indices that refer to the same frame.
int64_t positionOffset = mmapFramesRead - clientFramesWritten;
streamShared->setTimestampPositionOffset(positionOffset);
if (fifo->getFifoControllerBase()->getEmptyFramesAvailable() <
getFramesPerBurst()) {
underflowCount++;
} else {
fifo->write(mDistributionBuffer, getFramesPerBurst());
}
clientFramesWritten = fifo->getWriteCounter();
}
}
if (clientFramesWritten > 0) {
// This timestamp represents the completion of data being written into the
// client buffer. It is sent to the client and used in the timing model
// to decide when data will be available to read.
Timestamp timestamp(clientFramesWritten, AudioClock::getNanoseconds());
streamShared->markTransferTime(timestamp);
}
}
}
}
}
ALOGD("AAudioServiceEndpointCapture(): callbackLoop() exiting, %d underflows", underflowCount);
return NULL; // TODO review
}