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/*
* Copyright (C) 2019 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_NDEBUG 0
#define LOG_TAG "GCH_BasicResultProcessor"
#define ATRACE_TAG ATRACE_TAG_CAMERA
#include <log/log.h>
#include <utils/Trace.h>
#include <inttypes.h>
#include "basic_result_processor.h"
#include "hal_utils.h"
namespace android {
namespace google_camera_hal {
BasicResultProcessor::~BasicResultProcessor() {
// Avoid a possible timing issue that could result
// in invalid memory access. Once 'process_capture_result_'
// in 'ProcessResult' returns on the very last buffer of the
// last pending request, camera service will be able to
// re-configure the camera streams at any time. Depending
// on scheduling the current 'BasicResultProcessor' instance
// might be destroyed before 'ProcessResult' is able to
// unlock 'callback_lock_' which will result in undefined behavior.
// To resolve this block the destructor until the result
// callback is able to correctly unlock the mutex.
std::lock_guard<std::mutex> lock(callback_lock_);
}
std::unique_ptr<BasicResultProcessor> BasicResultProcessor::Create() {
auto result_processor =
std::unique_ptr<BasicResultProcessor>(new BasicResultProcessor());
if (result_processor == nullptr) {
ALOGE("%s: Creating BasicResultProcessor failed.", __FUNCTION__);
return nullptr;
}
return result_processor;
}
void BasicResultProcessor::SetResultCallback(
ProcessCaptureResultFunc process_capture_result, NotifyFunc notify) {
ATRACE_CALL();
std::lock_guard<std::mutex> lock(callback_lock_);
process_capture_result_ = process_capture_result;
notify_ = notify;
}
status_t BasicResultProcessor::AddPendingRequests(
const std::vector<ProcessBlockRequest>& process_block_requests,
const CaptureRequest& remaining_session_request) {
ATRACE_CALL();
// This is the last result processor. Sanity check if requests contains
// all remaining output buffers.
if (!hal_utils::AreAllRemainingBuffersRequested(process_block_requests,
remaining_session_request)) {
ALOGE("%s: Some output buffers will not be completed.", __FUNCTION__);
return BAD_VALUE;
}
return OK;
}
void BasicResultProcessor::ProcessResult(ProcessBlockResult block_result) {
ATRACE_CALL();
std::lock_guard<std::mutex> lock(callback_lock_);
if (block_result.result == nullptr) {
ALOGW("%s: Received a nullptr result.", __FUNCTION__);
return;
}
if (process_capture_result_ == nullptr) {
ALOGE("%s: process_capture_result_ is nullptr. Dropping a result.",
__FUNCTION__);
return;
}
process_capture_result_(std::move(block_result.result));
}
void BasicResultProcessor::Notify(const ProcessBlockNotifyMessage& block_message) {
ATRACE_CALL();
std::lock_guard<std::mutex> lock(callback_lock_);
if (notify_ == nullptr) {
ALOGE("%s: notify_ is nullptr. Dropping a message.", __FUNCTION__);
return;
}
notify_(block_message.message);
}
status_t BasicResultProcessor::FlushPendingRequests() {
ATRACE_CALL();
return INVALID_OPERATION;
}
} // namespace google_camera_hal
} // namespace android
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