Revert 273745 "Implements RTP header dumping." due to memory leak

trunk/src/chrome/browser/media/webrtc_rtp_dump_writer.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_BROWSER_MEDIA_WEBRTC_RTP_DUMP_WRITER_H_
-#define CHROME_BROWSER_MEDIA_WEBRTC_RTP_DUMP_WRITER_H_
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "base/time/time.h"
-#include "chrome/browser/media/rtp_dump_type.h"
-
-// This class is responsible for creating the compressed RTP header dump file:
-// - Adds the RTP headers to an in-memory buffer.
-// - When the in-memory buffer is full, compresses it, and writes it to the
-//   disk.
-// - Notifies the caller when the on-disk file size reaches the max limit.
-// - The uncompressed dump follows the standard RTPPlay format
-//   (http://www.cs.columbia.edu/irt/software/rtptools/).
-// - The caller is always responsible for cleaning up the dump file in all
-//   cases.
-// - WebRtcRtpDumpWriter does not stop writing to the dump after the max size
-//   limit is reached. The caller must stop calling WriteRtpPacket instead.
-//
-// This object must run on the IO thread.
-class WebRtcRtpDumpWriter {
- public:
-  typedef base::Callback<void(bool incoming_succeeded, bool outgoing_succeeded)>
-      EndDumpCallback;
-
-  // |incoming_dump_path| and |outgoing_dump_path| are the file paths of the
-  // compressed dump files for incoming and outgoing packets respectively.
-  // |max_dump_size| is the max size of the compressed dump file in bytes.
-  // |max_dump_size_reached_callback| will be called when the on-disk file size
-  // reaches |max_dump_size|.
-  WebRtcRtpDumpWriter(const base::FilePath& incoming_dump_path,
-                      const base::FilePath& outgoing_dump_path,
-                      size_t max_dump_size,
-                      const base::Closure& max_dump_size_reached_callback);
-
-  virtual ~WebRtcRtpDumpWriter();
-
-  // Adds a RTP packet to the dump. The caller must make sure it's a valid RTP
-  // packet. No validation is done by this method.
-  virtual void WriteRtpPacket(const uint8* packet_header,
-                              size_t header_length,
-                              size_t packet_length,
-                              bool incoming);
-
-  // Flushes the in-memory buffer to the disk and ends the dump. The caller must
-  // make sure the dump has not already been ended.
-  // |finished_callback| will be called to indicate whether the dump is valid.
-  // If this object is destroyed before the operation is finished, the callback
-  // will be canceled and the dump files will be deleted.
-  virtual void EndDump(RtpDumpType type,
-                       const EndDumpCallback& finished_callback);
-
-  size_t max_dump_size() const;
-
- private:
-  enum FlushResult {
-    // Flushing has succeeded and the dump size is under the max limit.
-    FLUSH_RESULT_SUCCESS,
-    // Nothing has been written to disk and the dump is empty.
-    FLUSH_RESULT_NO_DATA,
-    // Flushing has failed for other reasons.
-    FLUSH_RESULT_FAILURE
-  };
-
-  class FileThreadWorker;
-
-  typedef base::Callback<void(bool)> FlushDoneCallback;
-
-  // Used by EndDump to cache the input and intermediate results.
-  struct EndDumpContext {
-    EndDumpContext(RtpDumpType type, const EndDumpCallback& callback);
-    ~EndDumpContext();
-
-    RtpDumpType type;
-    bool incoming_succeeded;
-    bool outgoing_succeeded;
-    EndDumpCallback callback;
-  };
-
-  // Flushes the in-memory buffer to disk. If |incoming| is true, the incoming
-  // buffer will be flushed; otherwise, the outgoing buffer will be flushed.
-  // The dump file will be ended if |end_stream| is true. |callback| will be
-  // called when flushing is done.
-  void FlushBuffer(bool incoming,
-                   bool end_stream,
-                   const FlushDoneCallback& callback);
-
-  // Called when FlushBuffer finishes. Checks the max dump size limit and
-  // maybe calls the |max_dump_size_reached_callback_|. Also calls |callback|
-  // with the flush result.
-  void OnFlushDone(const FlushDoneCallback& callback,
-                   const scoped_ptr<FlushResult>& result,
-                   const scoped_ptr<size_t>& bytes_written);
-
-  // Called when one type of dump has been ended. It continues to end the other
-  // dump if needed based on |context| and |incoming|, or calls the callback in
-  // |context| if no more dump needs to be ended.
-  void OnDumpEnded(EndDumpContext context, bool incoming, bool success);
-
-  // The max limit on the total size of incoming and outgoing dumps on disk.
-  const size_t max_dump_size_;
-
-  // The callback to call when the max size limit is reached.
-  const base::Closure max_dump_size_reached_callback_;
-
-  // The in-memory buffers for the uncompressed dumps.
-  std::vector<uint8> incoming_buffer_;
-  std::vector<uint8> outgoing_buffer_;
-
-  // The time when the first packet is dumped.
-  base::TimeTicks start_time_;
-
-  // The total on-disk size of the compressed incoming and outgoing dumps.
-  size_t total_dump_size_on_disk_;
-
-  // File thread workers must be called and deleted on the FILE thread.
-  scoped_ptr<FileThreadWorker> incoming_file_thread_worker_;
-  scoped_ptr<FileThreadWorker> outgoing_file_thread_worker_;
-
-  base::ThreadChecker thread_checker_;
-
-  base::WeakPtrFactory<WebRtcRtpDumpWriter> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebRtcRtpDumpWriter);
-};
-
-#endif  // CHROME_BROWSER_MEDIA_WEBRTC_RTP_DUMP_WRITER_H_