You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.9 KiB
65 lines
1.9 KiB
4 months ago
|
/*
|
||
|
|
* Copyright 2015 The WebRTC Project Authors. All rights reserved.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by a BSD-style license
|
||
|
|
* that can be found in the LICENSE file in the root of the source
|
||
|
|
* tree. An additional intellectual property rights grant can be found
|
||
|
|
* in the file PATENTS. All contributing project authors may
|
||
|
|
* be found in the AUTHORS file in the root of the source tree.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef RTC_BASE_BUFFER_QUEUE_H_
|
||
|
|
#define RTC_BASE_BUFFER_QUEUE_H_
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include <deque>
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
#include "rtc_base/buffer.h"
|
||
|
|
#include "rtc_base/constructor_magic.h"
|
||
|
|
#include "rtc_base/synchronization/mutex.h"
|
||
|
|
#include "rtc_base/thread_annotations.h"
|
||
|
|
|
||
|
|
namespace rtc {
|
||
|
|
|
||
|
|
class BufferQueue {
|
||
|
|
public:
|
||
|
|
// Creates a buffer queue with a given capacity and default buffer size.
|
||
|
|
BufferQueue(size_t capacity, size_t default_size);
|
||
|
|
virtual ~BufferQueue();
|
||
|
|
|
||
|
|
// Return number of queued buffers.
|
||
|
|
size_t size() const;
|
||
|
|
|
||
|
|
// Clear the BufferQueue by moving all Buffers from |queue_| to |free_list_|.
|
||
|
|
void Clear();
|
||
|
|
|
||
|
|
// ReadFront will only read one buffer at a time and will truncate buffers
|
||
|
|
// that don't fit in the passed memory.
|
||
|
|
// Returns true unless no data could be returned.
|
||
|
|
bool ReadFront(void* data, size_t bytes, size_t* bytes_read);
|
||
|
|
|
||
|
|
// WriteBack always writes either the complete memory or nothing.
|
||
|
|
// Returns true unless no data could be written.
|
||
|
|
bool WriteBack(const void* data, size_t bytes, size_t* bytes_written);
|
||
|
|
|
||
|
|
protected:
|
||
|
|
// These methods are called when the state of the queue changes.
|
||
|
|
virtual void NotifyReadableForTest() {}
|
||
|
|
virtual void NotifyWritableForTest() {}
|
||
|
|
|
||
|
|
private:
|
||
|
|
size_t capacity_;
|
||
|
|
size_t default_size_;
|
||
|
|
mutable webrtc::Mutex mutex_;
|
||
|
|
std::deque<Buffer*> queue_ RTC_GUARDED_BY(mutex_);
|
||
|
|
std::vector<Buffer*> free_list_ RTC_GUARDED_BY(mutex_);
|
||
|
|
|
||
|
|
RTC_DISALLOW_COPY_AND_ASSIGN(BufferQueue);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace rtc
|
||
|
|
|
||
|
|
#endif // RTC_BASE_BUFFER_QUEUE_H_
|