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66 lines
1.6 KiB
66 lines
1.6 KiB
#ifndef FRAME_QUEUE_H
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#define FRAME_QUEUE_H
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#include <queue>
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#include <mutex>
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#include <condition_variable>
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#include <chrono>
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#include <optional>
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template<typename T>
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class FrameQueue {
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public:
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explicit FrameQueue(size_t max_size = 4) : max_size_(max_size) {}
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bool push(const T& item) {
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std::unique_lock<std::mutex> lock(mutex_);
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if (queue_.size() >= max_size_) {
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queue_.pop(); // 丢弃最旧
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}
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queue_.push(item);
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cv_.notify_one();
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return true;
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}
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bool pop(T& out_item, int timeout_ms = 100) {
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std::unique_lock<std::mutex> lock(mutex_);
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if (!cv_.wait_for(lock, std::chrono::milliseconds(timeout_ms),
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[this]{ return !queue_.empty(); })) {
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return false;
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}
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out_item = std::move(queue_.front());
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queue_.pop();
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return true;
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}
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std::optional<T> tryPop() {
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std::unique_lock<std::mutex> lock(mutex_);
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if (queue_.empty()) return std::nullopt;
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T item = std::move(queue_.front());
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queue_.pop();
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return item;
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}
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size_t size() const {
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std::unique_lock<std::mutex> lock(mutex_);
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return queue_.size();
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}
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void clear() {
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std::unique_lock<std::mutex> lock(mutex_);
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while (!queue_.empty()) queue_.pop();
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}
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bool empty() const {
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std::unique_lock<std::mutex> lock(mutex_);
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return queue_.empty();
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}
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private:
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mutable std::mutex mutex_;
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std::condition_variable cv_;
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std::queue<T> queue_;
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size_t max_size_;
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};
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#endif // FRAME_QUEUE_H
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