mirror of
https://github.com/hajimehoshi/ebiten.git
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687 lines
27 KiB
C++
Vendored
687 lines
27 KiB
C++
Vendored
/*
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* Copyright 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <cassert>
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#include <stdint.h>
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#include <stdlib.h>
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#include "oboe_aaudio_AAudioLoader_android.h"
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#include "oboe_aaudio_AudioStreamAAudio_android.h"
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#include "oboe_common_AudioClock_android.h"
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#include "oboe_common_OboeDebug_android.h"
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#include "oboe_oboe_Utilities_android.h"
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#ifdef __ANDROID__
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#include <sys/system_properties.h>
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#include "oboe_common_QuirksManager_android.h"
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#endif
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#ifndef OBOE_FIX_FORCE_STARTING_TO_STARTED
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// Workaround state problems in AAudio
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// TODO Which versions does this occur in? Verify fixed in Q.
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#define OBOE_FIX_FORCE_STARTING_TO_STARTED 1
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#endif // OBOE_FIX_FORCE_STARTING_TO_STARTED
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using namespace oboe;
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AAudioLoader *AudioStreamAAudio::mLibLoader = nullptr;
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// 'C' wrapper for the data callback method
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static aaudio_data_callback_result_t oboe_aaudio_data_callback_proc(
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AAudioStream *stream,
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void *userData,
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void *audioData,
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int32_t numFrames) {
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AudioStreamAAudio *oboeStream = reinterpret_cast<AudioStreamAAudio*>(userData);
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if (oboeStream != nullptr) {
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return static_cast<aaudio_data_callback_result_t>(
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oboeStream->callOnAudioReady(stream, audioData, numFrames));
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} else {
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return static_cast<aaudio_data_callback_result_t>(DataCallbackResult::Stop);
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}
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}
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// This runs in its own thread.
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// Only one of these threads will be launched from internalErrorCallback().
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// It calls app error callbacks from a static function in case the stream gets deleted.
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static void oboe_aaudio_error_thread_proc(AudioStreamAAudio *oboeStream,
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Result error) {
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LOGD("%s() - entering >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>", __func__);
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AudioStreamErrorCallback *errorCallback = oboeStream->getErrorCallback();
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if (errorCallback == nullptr) return; // should be impossible
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bool isErrorHandled = errorCallback->onError(oboeStream, error);
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if (!isErrorHandled) {
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oboeStream->requestStop();
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errorCallback->onErrorBeforeClose(oboeStream, error);
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oboeStream->close();
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// Warning, oboeStream may get deleted by this callback.
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errorCallback->onErrorAfterClose(oboeStream, error);
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}
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LOGD("%s() - exiting <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<", __func__);
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}
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// This runs in its own thread.
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// Only one of these threads will be launched from internalErrorCallback().
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// Prevents deletion of the stream if the app is using AudioStreamBuilder::openSharedStream()
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static void oboe_aaudio_error_thread_proc_shared(std::shared_ptr<AudioStream> sharedStream,
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Result error) {
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AudioStreamAAudio *oboeStream = reinterpret_cast<AudioStreamAAudio*>(sharedStream.get());
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oboe_aaudio_error_thread_proc(oboeStream, error);
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}
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namespace oboe {
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/*
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* Create a stream that uses Oboe Audio API.
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*/
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AudioStreamAAudio::AudioStreamAAudio(const AudioStreamBuilder &builder)
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: AudioStream(builder)
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, mAAudioStream(nullptr) {
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mCallbackThreadEnabled.store(false);
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mLibLoader = AAudioLoader::getInstance();
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}
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bool AudioStreamAAudio::isSupported() {
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mLibLoader = AAudioLoader::getInstance();
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int openResult = mLibLoader->open();
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return openResult == 0;
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}
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// Static method for the error callback.
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// We use a method so we can access protected methods on the stream.
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// Launch a thread to handle the error.
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// That other thread can safely stop, close and delete the stream.
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void AudioStreamAAudio::internalErrorCallback(
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AAudioStream *stream,
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void *userData,
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aaudio_result_t error) {
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oboe::Result oboeResult = static_cast<Result>(error);
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AudioStreamAAudio *oboeStream = reinterpret_cast<AudioStreamAAudio*>(userData);
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// Coerce the error code if needed to workaround a regression in RQ1A that caused
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// the wrong code to be passed when headsets plugged in. See b/173928197.
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if (OboeGlobals::areWorkaroundsEnabled()
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&& getSdkVersion() == __ANDROID_API_R__
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&& oboeResult == oboe::Result::ErrorTimeout) {
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oboeResult = oboe::Result::ErrorDisconnected;
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LOGD("%s() ErrorTimeout changed to ErrorDisconnected to fix b/173928197", __func__);
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}
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oboeStream->mErrorCallbackResult = oboeResult;
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// Prevents deletion of the stream if the app is using AudioStreamBuilder::openStream(shared_ptr)
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std::shared_ptr<AudioStream> sharedStream = oboeStream->lockWeakThis();
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// These checks should be enough because we assume that the stream close()
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// will join() any active callback threads and will not allow new callbacks.
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if (oboeStream->wasErrorCallbackCalled()) { // block extra error callbacks
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LOGE("%s() multiple error callbacks called!", __func__);
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} else if (stream != oboeStream->getUnderlyingStream()) {
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LOGW("%s() stream already closed or closing", __func__); // might happen if there are bugs
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} else if (sharedStream) {
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// Handle error on a separate thread using shared pointer.
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std::thread t(oboe_aaudio_error_thread_proc_shared, sharedStream, oboeResult);
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t.detach();
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} else {
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// Handle error on a separate thread.
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std::thread t(oboe_aaudio_error_thread_proc, oboeStream, oboeResult);
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t.detach();
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}
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}
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void AudioStreamAAudio::logUnsupportedAttributes() {
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int sdkVersion = getSdkVersion();
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// These attributes are not supported pre Android "P"
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if (sdkVersion < __ANDROID_API_P__) {
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if (mUsage != Usage::Media) {
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LOGW("Usage [AudioStreamBuilder::setUsage()] "
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"is not supported on AAudio streams running on pre-Android P versions.");
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}
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if (mContentType != ContentType::Music) {
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LOGW("ContentType [AudioStreamBuilder::setContentType()] "
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"is not supported on AAudio streams running on pre-Android P versions.");
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}
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if (mSessionId != SessionId::None) {
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LOGW("SessionId [AudioStreamBuilder::setSessionId()] "
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"is not supported on AAudio streams running on pre-Android P versions.");
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}
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}
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}
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Result AudioStreamAAudio::open() {
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Result result = Result::OK;
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if (mAAudioStream != nullptr) {
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return Result::ErrorInvalidState;
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}
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result = AudioStream::open();
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if (result != Result::OK) {
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return result;
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}
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AAudioStreamBuilder *aaudioBuilder;
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result = static_cast<Result>(mLibLoader->createStreamBuilder(&aaudioBuilder));
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if (result != Result::OK) {
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return result;
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}
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// Do not set INPUT capacity below 4096 because that prevents us from getting a FAST track
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// when using the Legacy data path.
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// If the app requests > 4096 then we allow it but we are less likely to get LowLatency.
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// See internal bug b/80308183 for more details.
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// Fixed in Q but let's still clip the capacity because high input capacity
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// does not increase latency.
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int32_t capacity = mBufferCapacityInFrames;
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constexpr int kCapacityRequiredForFastLegacyTrack = 4096; // matches value in AudioFinger
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if (OboeGlobals::areWorkaroundsEnabled()
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&& mDirection == oboe::Direction::Input
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&& capacity != oboe::Unspecified
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&& capacity < kCapacityRequiredForFastLegacyTrack
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&& mPerformanceMode == oboe::PerformanceMode::LowLatency) {
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capacity = kCapacityRequiredForFastLegacyTrack;
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LOGD("AudioStreamAAudio.open() capacity changed from %d to %d for lower latency",
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static_cast<int>(mBufferCapacityInFrames), capacity);
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}
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mLibLoader->builder_setBufferCapacityInFrames(aaudioBuilder, capacity);
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mLibLoader->builder_setChannelCount(aaudioBuilder, mChannelCount);
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mLibLoader->builder_setDeviceId(aaudioBuilder, mDeviceId);
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mLibLoader->builder_setDirection(aaudioBuilder, static_cast<aaudio_direction_t>(mDirection));
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mLibLoader->builder_setFormat(aaudioBuilder, static_cast<aaudio_format_t>(mFormat));
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mLibLoader->builder_setSampleRate(aaudioBuilder, mSampleRate);
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mLibLoader->builder_setSharingMode(aaudioBuilder,
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static_cast<aaudio_sharing_mode_t>(mSharingMode));
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mLibLoader->builder_setPerformanceMode(aaudioBuilder,
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static_cast<aaudio_performance_mode_t>(mPerformanceMode));
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// These were added in P so we have to check for the function pointer.
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if (mLibLoader->builder_setUsage != nullptr) {
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mLibLoader->builder_setUsage(aaudioBuilder,
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static_cast<aaudio_usage_t>(mUsage));
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}
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if (mLibLoader->builder_setContentType != nullptr) {
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mLibLoader->builder_setContentType(aaudioBuilder,
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static_cast<aaudio_content_type_t>(mContentType));
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}
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if (mLibLoader->builder_setInputPreset != nullptr) {
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aaudio_input_preset_t inputPreset = mInputPreset;
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if (getSdkVersion() <= __ANDROID_API_P__ && inputPreset == InputPreset::VoicePerformance) {
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LOGD("InputPreset::VoicePerformance not supported before Q. Using VoiceRecognition.");
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inputPreset = InputPreset::VoiceRecognition; // most similar preset
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}
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mLibLoader->builder_setInputPreset(aaudioBuilder,
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static_cast<aaudio_input_preset_t>(inputPreset));
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}
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if (mLibLoader->builder_setSessionId != nullptr) {
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mLibLoader->builder_setSessionId(aaudioBuilder,
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static_cast<aaudio_session_id_t>(mSessionId));
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}
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// TODO get more parameters from the builder?
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if (isDataCallbackSpecified()) {
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mLibLoader->builder_setDataCallback(aaudioBuilder, oboe_aaudio_data_callback_proc, this);
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mLibLoader->builder_setFramesPerDataCallback(aaudioBuilder, getFramesPerDataCallback());
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if (!isErrorCallbackSpecified()) {
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// The app did not specify a callback so we should specify
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// our own so the stream gets closed and stopped.
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mErrorCallback = &mDefaultErrorCallback;
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}
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mLibLoader->builder_setErrorCallback(aaudioBuilder, internalErrorCallback, this);
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}
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// Else if the data callback is not being used then the write method will return an error
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// and the app can stop and close the stream.
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// ============= OPEN THE STREAM ================
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{
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AAudioStream *stream = nullptr;
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result = static_cast<Result>(mLibLoader->builder_openStream(aaudioBuilder, &stream));
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mAAudioStream.store(stream);
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}
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if (result != Result::OK) {
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// Warn developer because ErrorInternal is not very informative.
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if (result == Result::ErrorInternal && mDirection == Direction::Input) {
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LOGW("AudioStreamAAudio.open() may have failed due to lack of "
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"audio recording permission.");
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}
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goto error2;
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}
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// Query and cache the stream properties
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mDeviceId = mLibLoader->stream_getDeviceId(mAAudioStream);
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mChannelCount = mLibLoader->stream_getChannelCount(mAAudioStream);
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mSampleRate = mLibLoader->stream_getSampleRate(mAAudioStream);
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mFormat = static_cast<AudioFormat>(mLibLoader->stream_getFormat(mAAudioStream));
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mSharingMode = static_cast<SharingMode>(mLibLoader->stream_getSharingMode(mAAudioStream));
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mPerformanceMode = static_cast<PerformanceMode>(
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mLibLoader->stream_getPerformanceMode(mAAudioStream));
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mBufferCapacityInFrames = mLibLoader->stream_getBufferCapacity(mAAudioStream);
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mBufferSizeInFrames = mLibLoader->stream_getBufferSize(mAAudioStream);
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// These were added in P so we have to check for the function pointer.
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if (mLibLoader->stream_getUsage != nullptr) {
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mUsage = static_cast<Usage>(mLibLoader->stream_getUsage(mAAudioStream));
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}
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if (mLibLoader->stream_getContentType != nullptr) {
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mContentType = static_cast<ContentType>(mLibLoader->stream_getContentType(mAAudioStream));
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}
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if (mLibLoader->stream_getInputPreset != nullptr) {
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mInputPreset = static_cast<InputPreset>(mLibLoader->stream_getInputPreset(mAAudioStream));
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}
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if (mLibLoader->stream_getSessionId != nullptr) {
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mSessionId = static_cast<SessionId>(mLibLoader->stream_getSessionId(mAAudioStream));
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} else {
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mSessionId = SessionId::None;
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}
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LOGD("AudioStreamAAudio.open() format=%d, sampleRate=%d, capacity = %d",
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static_cast<int>(mFormat), static_cast<int>(mSampleRate),
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static_cast<int>(mBufferCapacityInFrames));
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error2:
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mLibLoader->builder_delete(aaudioBuilder);
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LOGD("AudioStreamAAudio.open: AAudioStream_Open() returned %s",
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mLibLoader->convertResultToText(static_cast<aaudio_result_t>(result)));
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return result;
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}
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Result AudioStreamAAudio::close() {
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// Prevent two threads from closing the stream at the same time and crashing.
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// This could occur, for example, if an application called close() at the same
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// time that an onError callback was being executed because of a disconnect.
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std::lock_guard<std::mutex> lock(mLock);
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AudioStream::close();
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// This will delete the AAudio stream object so we need to null out the pointer.
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AAudioStream *stream = mAAudioStream.exchange(nullptr);
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if (stream != nullptr) {
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if (OboeGlobals::areWorkaroundsEnabled()) {
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// Make sure we are really stopped. Do it under mLock
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// so another thread cannot call requestStart() right before the close.
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requestStop_l(stream);
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// Sometimes a callback can occur shortly after a stream has been stopped and
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// even after a close! If the stream has been closed then the callback
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// can access memory that has been freed. That causes a crash.
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// This seems to be more likely in Android P or earlier.
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// But it can also occur in later versions.
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usleep(kDelayBeforeCloseMillis * 1000);
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}
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return static_cast<Result>(mLibLoader->stream_close(stream));
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} else {
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return Result::ErrorClosed;
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}
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}
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DataCallbackResult AudioStreamAAudio::callOnAudioReady(AAudioStream *stream,
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void *audioData,
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int32_t numFrames) {
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DataCallbackResult result = fireDataCallback(audioData, numFrames);
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if (result == DataCallbackResult::Continue) {
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return result;
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} else {
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if (result == DataCallbackResult::Stop) {
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LOGD("Oboe callback returned DataCallbackResult::Stop");
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} else {
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LOGE("Oboe callback returned unexpected value = %d", result);
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}
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if (getSdkVersion() <= __ANDROID_API_P__) {
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launchStopThread();
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if (isMMapUsed()) {
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return DataCallbackResult::Stop;
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} else {
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// Legacy stream <= API_P cannot be restarted after returning Stop.
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return DataCallbackResult::Continue;
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}
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} else {
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return DataCallbackResult::Stop; // OK >= API_Q
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}
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}
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}
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Result AudioStreamAAudio::requestStart() {
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std::lock_guard<std::mutex> lock(mLock);
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AAudioStream *stream = mAAudioStream.load();
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if (stream != nullptr) {
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// Avoid state machine errors in O_MR1.
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if (getSdkVersion() <= __ANDROID_API_O_MR1__) {
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StreamState state = static_cast<StreamState>(mLibLoader->stream_getState(stream));
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if (state == StreamState::Starting || state == StreamState::Started) {
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// WARNING: On P, AAudio is returning ErrorInvalidState for Output and OK for Input.
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return Result::OK;
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}
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}
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if (isDataCallbackSpecified()) {
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setDataCallbackEnabled(true);
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}
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return static_cast<Result>(mLibLoader->stream_requestStart(stream));
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} else {
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return Result::ErrorClosed;
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}
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}
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Result AudioStreamAAudio::requestPause() {
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std::lock_guard<std::mutex> lock(mLock);
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AAudioStream *stream = mAAudioStream.load();
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if (stream != nullptr) {
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// Avoid state machine errors in O_MR1.
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if (getSdkVersion() <= __ANDROID_API_O_MR1__) {
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StreamState state = static_cast<StreamState>(mLibLoader->stream_getState(stream));
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if (state == StreamState::Pausing || state == StreamState::Paused) {
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return Result::OK;
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}
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}
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return static_cast<Result>(mLibLoader->stream_requestPause(stream));
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} else {
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return Result::ErrorClosed;
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}
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}
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Result AudioStreamAAudio::requestFlush() {
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std::lock_guard<std::mutex> lock(mLock);
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AAudioStream *stream = mAAudioStream.load();
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if (stream != nullptr) {
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// Avoid state machine errors in O_MR1.
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if (getSdkVersion() <= __ANDROID_API_O_MR1__) {
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StreamState state = static_cast<StreamState>(mLibLoader->stream_getState(stream));
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if (state == StreamState::Flushing || state == StreamState::Flushed) {
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return Result::OK;
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}
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}
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return static_cast<Result>(mLibLoader->stream_requestFlush(stream));
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} else {
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return Result::ErrorClosed;
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}
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}
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Result AudioStreamAAudio::requestStop() {
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std::lock_guard<std::mutex> lock(mLock);
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AAudioStream *stream = mAAudioStream.load();
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if (stream != nullptr) {
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return requestStop_l(stream);
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} else {
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return Result::ErrorClosed;
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}
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}
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// Call under mLock
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Result AudioStreamAAudio::requestStop_l(AAudioStream *stream) {
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// Avoid state machine errors in O_MR1.
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if (getSdkVersion() <= __ANDROID_API_O_MR1__) {
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StreamState state = static_cast<StreamState>(mLibLoader->stream_getState(stream));
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if (state == StreamState::Stopping || state == StreamState::Stopped) {
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return Result::OK;
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}
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}
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return static_cast<Result>(mLibLoader->stream_requestStop(stream));
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}
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ResultWithValue<int32_t> AudioStreamAAudio::write(const void *buffer,
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int32_t numFrames,
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int64_t timeoutNanoseconds) {
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AAudioStream *stream = mAAudioStream.load();
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if (stream != nullptr) {
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int32_t result = mLibLoader->stream_write(mAAudioStream, buffer,
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numFrames, timeoutNanoseconds);
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return ResultWithValue<int32_t>::createBasedOnSign(result);
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} else {
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return ResultWithValue<int32_t>(Result::ErrorClosed);
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}
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}
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ResultWithValue<int32_t> AudioStreamAAudio::read(void *buffer,
|
|
int32_t numFrames,
|
|
int64_t timeoutNanoseconds) {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
int32_t result = mLibLoader->stream_read(mAAudioStream, buffer,
|
|
numFrames, timeoutNanoseconds);
|
|
return ResultWithValue<int32_t>::createBasedOnSign(result);
|
|
} else {
|
|
return ResultWithValue<int32_t>(Result::ErrorClosed);
|
|
}
|
|
}
|
|
|
|
|
|
// AAudioStream_waitForStateChange() can crash if it is waiting on a stream and that stream
|
|
// is closed from another thread. We do not want to lock the stream for the duration of the call.
|
|
// So we call AAudioStream_waitForStateChange() with a timeout of zero so that it will not block.
|
|
// Then we can do our own sleep with the lock unlocked.
|
|
Result AudioStreamAAudio::waitForStateChange(StreamState currentState,
|
|
StreamState *nextState,
|
|
int64_t timeoutNanoseconds) {
|
|
Result oboeResult = Result::ErrorTimeout;
|
|
int64_t sleepTimeNanos = 20 * kNanosPerMillisecond; // arbitrary
|
|
aaudio_stream_state_t currentAAudioState = static_cast<aaudio_stream_state_t>(currentState);
|
|
|
|
aaudio_result_t result = AAUDIO_OK;
|
|
int64_t timeLeftNanos = timeoutNanoseconds;
|
|
|
|
mLock.lock();
|
|
while (true) {
|
|
// Do we still have an AAudio stream? If not then stream must have been closed.
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream == nullptr) {
|
|
if (nextState != nullptr) {
|
|
*nextState = StreamState::Closed;
|
|
}
|
|
oboeResult = Result::ErrorClosed;
|
|
break;
|
|
}
|
|
|
|
// Update and query state change with no blocking.
|
|
aaudio_stream_state_t aaudioNextState;
|
|
result = mLibLoader->stream_waitForStateChange(
|
|
mAAudioStream,
|
|
currentAAudioState,
|
|
&aaudioNextState,
|
|
0); // timeout=0 for non-blocking
|
|
// AAudio will return AAUDIO_ERROR_TIMEOUT if timeout=0 and the state does not change.
|
|
if (result != AAUDIO_OK && result != AAUDIO_ERROR_TIMEOUT) {
|
|
oboeResult = static_cast<Result>(result);
|
|
break;
|
|
}
|
|
#if OBOE_FIX_FORCE_STARTING_TO_STARTED
|
|
if (OboeGlobals::areWorkaroundsEnabled()
|
|
&& aaudioNextState == static_cast<aaudio_stream_state_t >(StreamState::Starting)) {
|
|
aaudioNextState = static_cast<aaudio_stream_state_t >(StreamState::Started);
|
|
}
|
|
#endif // OBOE_FIX_FORCE_STARTING_TO_STARTED
|
|
if (nextState != nullptr) {
|
|
*nextState = static_cast<StreamState>(aaudioNextState);
|
|
}
|
|
if (currentAAudioState != aaudioNextState) { // state changed?
|
|
oboeResult = Result::OK;
|
|
break;
|
|
}
|
|
|
|
// Did we timeout or did user ask for non-blocking?
|
|
if (timeLeftNanos <= 0) {
|
|
break;
|
|
}
|
|
|
|
// No change yet so sleep.
|
|
mLock.unlock(); // Don't sleep while locked.
|
|
if (sleepTimeNanos > timeLeftNanos) {
|
|
sleepTimeNanos = timeLeftNanos; // last little bit
|
|
}
|
|
AudioClock::sleepForNanos(sleepTimeNanos);
|
|
timeLeftNanos -= sleepTimeNanos;
|
|
mLock.lock();
|
|
}
|
|
|
|
mLock.unlock();
|
|
return oboeResult;
|
|
}
|
|
|
|
ResultWithValue<int32_t> AudioStreamAAudio::setBufferSizeInFrames(int32_t requestedFrames) {
|
|
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
|
|
if (stream != nullptr) {
|
|
int32_t adjustedFrames = requestedFrames;
|
|
if (adjustedFrames > mBufferCapacityInFrames) {
|
|
adjustedFrames = mBufferCapacityInFrames;
|
|
}
|
|
adjustedFrames = QuirksManager::getInstance().clipBufferSize(*this, adjustedFrames);
|
|
|
|
int32_t newBufferSize = mLibLoader->stream_setBufferSize(mAAudioStream, adjustedFrames);
|
|
|
|
// Cache the result if it's valid
|
|
if (newBufferSize > 0) mBufferSizeInFrames = newBufferSize;
|
|
|
|
return ResultWithValue<int32_t>::createBasedOnSign(newBufferSize);
|
|
|
|
} else {
|
|
return ResultWithValue<int32_t>(Result::ErrorClosed);
|
|
}
|
|
}
|
|
|
|
StreamState AudioStreamAAudio::getState() const {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
aaudio_stream_state_t aaudioState = mLibLoader->stream_getState(stream);
|
|
#if OBOE_FIX_FORCE_STARTING_TO_STARTED
|
|
if (OboeGlobals::areWorkaroundsEnabled()
|
|
&& aaudioState == AAUDIO_STREAM_STATE_STARTING) {
|
|
aaudioState = AAUDIO_STREAM_STATE_STARTED;
|
|
}
|
|
#endif // OBOE_FIX_FORCE_STARTING_TO_STARTED
|
|
return static_cast<StreamState>(aaudioState);
|
|
} else {
|
|
return StreamState::Closed;
|
|
}
|
|
}
|
|
|
|
int32_t AudioStreamAAudio::getBufferSizeInFrames() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
mBufferSizeInFrames = mLibLoader->stream_getBufferSize(stream);
|
|
}
|
|
return mBufferSizeInFrames;
|
|
}
|
|
|
|
int32_t AudioStreamAAudio::getFramesPerBurst() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
mFramesPerBurst = mLibLoader->stream_getFramesPerBurst(stream);
|
|
}
|
|
return mFramesPerBurst;
|
|
}
|
|
|
|
void AudioStreamAAudio::updateFramesRead() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
mFramesRead = mLibLoader->stream_getFramesRead(stream);
|
|
}
|
|
}
|
|
|
|
void AudioStreamAAudio::updateFramesWritten() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
mFramesWritten = mLibLoader->stream_getFramesWritten(stream);
|
|
}
|
|
}
|
|
|
|
ResultWithValue<int32_t> AudioStreamAAudio::getXRunCount() const {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
return ResultWithValue<int32_t>::createBasedOnSign(mLibLoader->stream_getXRunCount(stream));
|
|
} else {
|
|
return ResultWithValue<int32_t>(Result::ErrorNull);
|
|
}
|
|
}
|
|
|
|
Result AudioStreamAAudio::getTimestamp(clockid_t clockId,
|
|
int64_t *framePosition,
|
|
int64_t *timeNanoseconds) {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
if (getState() != StreamState::Started) {
|
|
return Result::ErrorInvalidState;
|
|
}
|
|
return static_cast<Result>(mLibLoader->stream_getTimestamp(stream, clockId,
|
|
framePosition, timeNanoseconds));
|
|
} else {
|
|
return Result::ErrorNull;
|
|
}
|
|
}
|
|
|
|
ResultWithValue<double> AudioStreamAAudio::calculateLatencyMillis() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream == nullptr) {
|
|
return ResultWithValue<double>(Result::ErrorClosed);
|
|
}
|
|
|
|
// Get the time that a known audio frame was presented.
|
|
int64_t hardwareFrameIndex;
|
|
int64_t hardwareFrameHardwareTime;
|
|
auto result = getTimestamp(CLOCK_MONOTONIC,
|
|
&hardwareFrameIndex,
|
|
&hardwareFrameHardwareTime);
|
|
if (result != oboe::Result::OK) {
|
|
return ResultWithValue<double>(static_cast<Result>(result));
|
|
}
|
|
|
|
// Get counter closest to the app.
|
|
bool isOutput = (getDirection() == oboe::Direction::Output);
|
|
int64_t appFrameIndex = isOutput ? getFramesWritten() : getFramesRead();
|
|
|
|
// Assume that the next frame will be processed at the current time
|
|
using namespace std::chrono;
|
|
int64_t appFrameAppTime =
|
|
duration_cast<nanoseconds>(steady_clock::now().time_since_epoch()).count();
|
|
|
|
// Calculate the number of frames between app and hardware
|
|
int64_t frameIndexDelta = appFrameIndex - hardwareFrameIndex;
|
|
|
|
// Calculate the time which the next frame will be or was presented
|
|
int64_t frameTimeDelta = (frameIndexDelta * oboe::kNanosPerSecond) / getSampleRate();
|
|
int64_t appFrameHardwareTime = hardwareFrameHardwareTime + frameTimeDelta;
|
|
|
|
// The current latency is the difference in time between when the current frame is at
|
|
// the app and when it is at the hardware.
|
|
double latencyNanos = static_cast<double>(isOutput
|
|
? (appFrameHardwareTime - appFrameAppTime) // hardware is later
|
|
: (appFrameAppTime - appFrameHardwareTime)); // hardware is earlier
|
|
double latencyMillis = latencyNanos / kNanosPerMillisecond;
|
|
|
|
return ResultWithValue<double>(latencyMillis);
|
|
}
|
|
|
|
bool AudioStreamAAudio::isMMapUsed() {
|
|
AAudioStream *stream = mAAudioStream.load();
|
|
if (stream != nullptr) {
|
|
return mLibLoader->stream_isMMapUsed(stream);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
} // namespace oboe
|