Report data from aaudio mmap path to audio flinger.
Report data from aaudio mmap path to audio flinger for sound dose
computation. A shared memory is allocated for read and write counter.
The client will shared the write counter with the aaudio service. The
command thread will wake up every 5 burst time to report the data to
audio flinger.
Test: atest AAudioTests
Test: test_marshalling
Test: dump wav file in audio flinger and play
Bug: 264254430
Change-Id: Ib732442c5afc9169fe891212cf77b458c41a87f1
diff --git a/services/oboeservice/SharedMemoryWrapper.cpp b/services/oboeservice/SharedMemoryWrapper.cpp
new file mode 100644
index 0000000..c0dcccb
--- /dev/null
+++ b/services/oboeservice/SharedMemoryWrapper.cpp
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2023 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 "SharedMemoryWrapper"
+//#define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include <iomanip>
+#include <iostream>
+#include <sys/mman.h>
+
+#include "SharedMemoryWrapper.h"
+
+namespace aaudio {
+
+constexpr int COUNTER_SIZE_IN_BYTES = sizeof(android::fifo_counter_t);
+constexpr int WRAPPER_SIZE_IN_BYTES = 2 * COUNTER_SIZE_IN_BYTES;
+
+SharedMemoryWrapper::SharedMemoryWrapper() {
+ mCounterFd.reset(ashmem_create_region("AAudioSharedMemoryWrapper", WRAPPER_SIZE_IN_BYTES));
+ if (mCounterFd.get() == -1) {
+ ALOGE("allocate() ashmem_create_region() failed %d", errno);
+ return;
+ }
+ int err = ashmem_set_prot_region(mCounterFd.get(), PROT_READ|PROT_WRITE);
+ if (err < 0) {
+ ALOGE("allocate() ashmem_set_prot_region() failed %d", errno);
+ mCounterFd.reset();
+ return;
+ }
+ auto tmpPtr = (uint8_t *) mmap(nullptr, WRAPPER_SIZE_IN_BYTES,
+ PROT_READ|PROT_WRITE,
+ MAP_SHARED,
+ mCounterFd.get(), 0);
+ if (tmpPtr == MAP_FAILED) {
+ ALOGE("allocate() mmap() failed %d", errno);
+ mCounterFd.reset();
+ return;
+ }
+ mCounterMemoryAddress = tmpPtr;
+
+ mReadCounterAddress = (android::fifo_counter_t*) mCounterMemoryAddress;
+ mWriteCounterAddress = (android::fifo_counter_t*) &mCounterMemoryAddress[COUNTER_SIZE_IN_BYTES];
+}
+
+SharedMemoryWrapper::~SharedMemoryWrapper()
+{
+ reset();
+ if (mCounterMemoryAddress != nullptr) {
+ munmap(mCounterMemoryAddress, COUNTER_SIZE_IN_BYTES);
+ mCounterMemoryAddress = nullptr;
+ }
+}
+
+aaudio_result_t SharedMemoryWrapper::setupFifoBuffer(android::fifo_frames_t bytesPerFrame,
+ android::fifo_frames_t capacityInFrames) {
+ if (mDataFd.get() == -1) {
+ ALOGE("%s data file descriptor is not initialized", __func__);
+ return AAUDIO_ERROR_INTERNAL;
+ }
+ if (mCounterMemoryAddress == nullptr) {
+ ALOGE("%s the counter memory is not allocated correctly", __func__);
+ return AAUDIO_ERROR_INTERNAL;
+ }
+ mSharedMemorySizeInBytes = bytesPerFrame * capacityInFrames;
+ auto tmpPtr = (uint8_t *) mmap(nullptr, mSharedMemorySizeInBytes,
+ PROT_READ|PROT_WRITE,
+ MAP_SHARED,
+ mDataFd.get(), 0);
+ if (tmpPtr == MAP_FAILED) {
+ ALOGE("allocate() mmap() failed %d", errno);
+ return AAUDIO_ERROR_INTERNAL;
+ }
+ mSharedMemory = tmpPtr;
+
+ mFifoBuffer = std::make_shared<android::FifoBufferIndirect>(
+ bytesPerFrame, capacityInFrames, mReadCounterAddress,
+ mWriteCounterAddress, mSharedMemory);
+ return AAUDIO_OK;
+}
+
+void SharedMemoryWrapper::reset() {
+ mFifoBuffer.reset();
+ if (mSharedMemory != nullptr) {
+ munmap(mSharedMemory, mSharedMemorySizeInBytes);
+ mSharedMemory = nullptr;
+ }
+ mDataFd.reset();
+}
+
+void SharedMemoryWrapper::fillParcelable(
+ AudioEndpointParcelable* endpointParcelable, RingBufferParcelable &ringBufferParcelable,
+ int32_t bytesPerFrame, int32_t framesPerBurst, int32_t capacityInFrames,
+ CounterFilling counterFilling) {
+ const int capacityInBytes = bytesPerFrame * capacityInFrames;
+ const int dataFdIndex =
+ endpointParcelable->addFileDescriptor(mDataFd, mSharedMemorySizeInBytes);
+ ringBufferParcelable.setBytesPerFrame(bytesPerFrame);
+ ringBufferParcelable.setFramesPerBurst(framesPerBurst);
+ ringBufferParcelable.setCapacityInFrames(capacityInFrames);
+ if (mCounterFd.get() == -1 || counterFilling == NONE) {
+ // Failed to create shared memory for read/write counter or requesting no filling counters.
+ ALOGD("%s no counter is filled, counterFd=%d", __func__, mCounterFd.get());
+ ringBufferParcelable.setupMemory(dataFdIndex, 0, capacityInBytes);
+ } else {
+ int counterFdIndex =
+ endpointParcelable->addFileDescriptor(mCounterFd, WRAPPER_SIZE_IN_BYTES);
+ const int readCounterSize = (counterFilling & READ) == NONE ? 0 : COUNTER_SIZE_IN_BYTES;
+ const int writeCounterSize = (counterFilling & WRITE) == NONE ? 0 : COUNTER_SIZE_IN_BYTES;
+ ALOGD("%s counterFdIndex=%d readCounterSize=%d, writeCounterSize=%d",
+ __func__, counterFdIndex, readCounterSize, writeCounterSize);
+ ringBufferParcelable.setupMemory(
+ {dataFdIndex, 0 /*offset*/, capacityInBytes},
+ {counterFdIndex, 0 /*offset*/, readCounterSize},
+ {counterFdIndex, COUNTER_SIZE_IN_BYTES, writeCounterSize});
+ }
+}
+
+} // namespace aaudio