audio: import aidl hal
* hardware/interfaces/audio/aidl/default/ at android-16.0.0_r1.
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Konsta
286
audio/stub/StreamMmapStub.cpp
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286
audio/stub/StreamMmapStub.cpp
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/*
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* Copyright (C) 2025 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 <unistd.h>
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#include <cstdlib>
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#define LOG_TAG "AHAL_MmapStream"
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#include <android-base/logging.h>
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#include <audio_utils/clock.h>
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#include <error/Result.h>
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#include <utils/SystemClock.h>
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#include "core-impl/StreamMmapStub.h"
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using aidl::android::hardware::audio::common::SinkMetadata;
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using aidl::android::hardware::audio::common::SourceMetadata;
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using aidl::android::media::audio::common::AudioOffloadInfo;
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using aidl::android::media::audio::common::MicrophoneInfo;
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namespace aidl::android::hardware::audio::core {
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namespace mmap {
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std::string DspSimulatorLogic::init() {
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{
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std::lock_guard l(mSharedState.lock);
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mSharedState.mmapPos.timeNs = StreamDescriptor::Position::UNKNOWN;
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mSharedState.mmapPos.frames = StreamDescriptor::Position::UNKNOWN;
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}
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// Progress in buffer size chunks to make sure that VTS tolerates infrequent position updates
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// (see b/350998390).
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mCycleDurationUs = (mSharedState.bufferSizeBytes / mSharedState.frameSizeBytes) *
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MICROS_PER_SECOND / mSharedState.sampleRate;
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return "";
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}
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DspSimulatorLogic::Status DspSimulatorLogic::cycle() {
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// Simulate DSP moving along in real time.
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const int64_t timeBeginNs = ::android::uptimeNanos();
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usleep(mCycleDurationUs);
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int64_t newFrames;
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std::lock_guard l(mSharedState.lock);
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if (mMemBegin != mSharedState.sharedMemory) {
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mMemBegin = mSharedState.sharedMemory;
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if (mMemBegin != nullptr) mMemPos = mMemBegin;
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}
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if (mMemBegin != nullptr) {
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mSharedState.mmapPos.timeNs = ::android::uptimeNanos();
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newFrames = (mSharedState.mmapPos.timeNs - timeBeginNs) * mSharedState.sampleRate /
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NANOS_PER_SECOND;
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// Restore the reported frames position to ensure continuity.
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if (mSharedState.mmapPos.frames == StreamDescriptor::Position::UNKNOWN) {
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mSharedState.mmapPos.frames = mLastFrames;
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}
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mSharedState.mmapPos.frames += newFrames;
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mLastFrames = mSharedState.mmapPos.frames;
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if (mSharedState.isInput) {
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for (size_t i = 0; i < static_cast<size_t>(newFrames) * mSharedState.frameSizeBytes;
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++i) {
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*mMemPos++ = std::rand() % 255;
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if (mMemPos >= mMemBegin + mSharedState.bufferSizeBytes) mMemPos = mMemBegin;
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}
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}
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} else {
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LOG(WARNING) << "No shared memory but the DSP is active";
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mSharedState.mmapPos.timeNs = StreamDescriptor::Position::UNKNOWN;
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mSharedState.mmapPos.frames = StreamDescriptor::Position::UNKNOWN;
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}
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return Status::CONTINUE;
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}
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} // namespace mmap
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using mmap::DspSimulatorState;
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DriverMmapStubImpl::DriverMmapStubImpl(const StreamContext& context)
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: DriverStubImpl(context, 0 /*asyncSleepTimeUs*/),
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mState{mIsInput, mSampleRate, static_cast<int>(mFrameSizeBytes),
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mBufferSizeFrames * mFrameSizeBytes},
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mDspWorker(mState) {
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LOG_IF(FATAL, !context.isMmap()) << "The steam must be used in MMAP mode";
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}
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::android::status_t DriverMmapStubImpl::init(DriverCallbackInterface* callback) {
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RETURN_STATUS_IF_ERROR(DriverStubImpl::init(callback));
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::drain(StreamDescriptor::DrainMode drainMode) {
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RETURN_STATUS_IF_ERROR(DriverStubImpl::drain(drainMode));
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mDspWorker.pause();
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::pause() {
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RETURN_STATUS_IF_ERROR(DriverStubImpl::pause());
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mDspWorker.pause();
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::start() {
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RETURN_STATUS_IF_ERROR(DriverStubImpl::start());
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RETURN_STATUS_IF_ERROR(startWorkerIfNeeded());
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mDspWorker.resume();
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::transfer(void*, size_t, size_t*, int32_t*) {
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// Do not call into DriverStubImpl::transfer
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if (!mIsInitialized) {
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LOG(FATAL) << __func__ << ": must not happen for an uninitialized driver";
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}
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if (mIsStandby) {
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LOG(FATAL) << __func__ << ": must not happen while in standby";
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}
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RETURN_STATUS_IF_ERROR(startWorkerIfNeeded());
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mDspWorker.resume();
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return ::android::OK;
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}
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void DriverMmapStubImpl::shutdown() {
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LOG(DEBUG) << __func__ << ": stopping the DSP simulator worker";
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mDspWorker.stop();
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std::lock_guard l(mState.lock);
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releaseSharedMemory();
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DriverStubImpl::shutdown();
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}
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::android::status_t DriverMmapStubImpl::initSharedMemory(int ashmemFd) {
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{
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std::lock_guard l(mState.lock);
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if (ashmemFd == -1) {
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mState.sharedMemory = nullptr;
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return ::android::BAD_VALUE;
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}
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RETURN_STATUS_IF_ERROR(releaseSharedMemory());
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}
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uint8_t* sharedMemory = static_cast<uint8_t*>(::mmap(
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nullptr, mState.bufferSizeBytes, PROT_READ | PROT_WRITE, MAP_SHARED, ashmemFd, 0));
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if (sharedMemory == reinterpret_cast<uint8_t*>(MAP_FAILED) || sharedMemory == nullptr) {
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PLOG(ERROR) << "mmap failed for size " << mState.bufferSizeBytes << ", fd " << ashmemFd;
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return ::android::NO_INIT;
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}
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std::lock_guard l(mState.lock);
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mState.sharedMemory = sharedMemory;
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::releaseSharedMemory() {
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if (mState.sharedMemory != nullptr) {
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LOG(DEBUG) << __func__ << ": unmapping shared memory";
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if (munmap(mState.sharedMemory, mState.bufferSizeBytes) != 0) {
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PLOG(ERROR) << "munmap failed for size " << mState.bufferSizeBytes;
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return ::android::INVALID_OPERATION;
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}
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mState.sharedMemory = nullptr;
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}
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::startWorkerIfNeeded() {
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if (!mDspWorkerStarted) {
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// This is an "audio service thread," must have elevated priority.
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if (!mDspWorker.start("dsp_sim", ANDROID_PRIORITY_URGENT_AUDIO)) {
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return ::android::NO_INIT;
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}
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mDspWorkerStarted = true;
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}
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::refinePosition(StreamDescriptor::Position* position) {
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std::lock_guard l(mState.lock);
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*position = mState.mmapPos;
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return ::android::OK;
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}
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::android::status_t DriverMmapStubImpl::getMmapPositionAndLatency(
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StreamDescriptor::Position* position, int32_t* latencyMs) {
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{
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std::lock_guard l(mState.lock);
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*position = mState.mmapPos;
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}
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const size_t latencyFrames = mBufferSizeFrames / 2;
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if (position->frames != StreamDescriptor::Position::UNKNOWN) {
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position->frames += latencyFrames;
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}
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*latencyMs = latencyFrames * MILLIS_PER_SECOND / mSampleRate;
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return ::android::OK;
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}
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const std::string StreamMmapStub::kCreateMmapBufferName = "aosp.createMmapBuffer";
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StreamMmapStub::StreamMmapStub(StreamContext* context, const Metadata& metadata)
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: StreamCommonImpl(context, metadata), DriverMmapStubImpl(getContext()) {}
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StreamMmapStub::~StreamMmapStub() {
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cleanupWorker();
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}
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ndk::ScopedAStatus StreamMmapStub::getVendorParameters(const std::vector<std::string>& in_ids,
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std::vector<VendorParameter>* _aidl_return) {
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std::vector<std::string> unprocessedIds;
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for (const auto& id : in_ids) {
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if (id == kCreateMmapBufferName) {
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LOG(DEBUG) << __func__ << ": " << id;
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MmapBufferDescriptor mmapDesc;
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RETURN_STATUS_IF_ERROR(createMmapBuffer(&mmapDesc));
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VendorParameter createMmapBuffer{.id = id};
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createMmapBuffer.ext.setParcelable(mmapDesc);
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LOG(DEBUG) << __func__ << ": returning " << mmapDesc.toString();
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_aidl_return->push_back(std::move(createMmapBuffer));
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} else {
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unprocessedIds.push_back(id);
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}
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}
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if (!unprocessedIds.empty()) {
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return StreamCommonImpl::getVendorParameters(unprocessedIds, _aidl_return);
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}
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus StreamMmapStub::setVendorParameters(
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const std::vector<VendorParameter>& in_parameters, bool in_async) {
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std::vector<VendorParameter> unprocessedParameters;
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for (const auto& param : in_parameters) {
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if (param.id == kCreateMmapBufferName) {
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LOG(DEBUG) << __func__ << ": " << param.id;
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// The value is irrelevant. The fact that this parameter can be "set" is an
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// indication that the method can be used by the client via 'getVendorParameters'.
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} else {
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unprocessedParameters.push_back(param);
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}
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}
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if (!unprocessedParameters.empty()) {
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return StreamCommonImpl::setVendorParameters(unprocessedParameters, in_async);
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}
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus StreamMmapStub::createMmapBuffer(MmapBufferDescriptor* desc) {
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const size_t bufferSizeFrames = mContext.getBufferSizeInFrames();
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const size_t bufferSizeBytes = static_cast<size_t>(bufferSizeFrames) * mContext.getFrameSize();
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const std::string regionName =
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std::string("mmap-sim-") + std::to_string(mContext.getMixPortHandle());
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int fd = ashmem_create_region(regionName.c_str(), bufferSizeBytes);
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if (fd < 0) {
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PLOG(ERROR) << __func__ << ": failed to create shared memory region of " << bufferSizeBytes
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<< " bytes";
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return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
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}
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mSharedMemoryFd = ndk::ScopedFileDescriptor(fd);
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if (initSharedMemory(mSharedMemoryFd.get()) != ::android::OK) {
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return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
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}
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desc->sharedMemory.fd = mSharedMemoryFd.dup();
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desc->sharedMemory.size = bufferSizeBytes;
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desc->burstSizeFrames = bufferSizeFrames / 2;
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desc->flags = 0;
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LOG(DEBUG) << __func__ << ": " << desc->toString();
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return ndk::ScopedAStatus::ok();
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}
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StreamInMmapStub::StreamInMmapStub(StreamContext&& context, const SinkMetadata& sinkMetadata,
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const std::vector<MicrophoneInfo>& microphones)
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: StreamIn(std::move(context), microphones), StreamMmapStub(&mContextInstance, sinkMetadata) {}
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StreamOutMmapStub::StreamOutMmapStub(StreamContext&& context, const SourceMetadata& sourceMetadata,
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const std::optional<AudioOffloadInfo>& offloadInfo)
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: StreamOut(std::move(context), offloadInfo),
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StreamMmapStub(&mContextInstance, sourceMetadata) {}
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} // namespace aidl::android::hardware::audio::core
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