Remove DataSourceImpl from chrome/renderer/media...

chrome/renderer/media/data_source_impl.h

-// Copyright (c) 2009 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.
-//
-// A Chrome specific data source for video stack pipeline. The actual resource
-// loading would happen in the browser process. This class is given a file
-// handle and will ask for progress of downloading from RenderView which
-// delegates requests to browser process through IPC. Asynchronous IO will be
-// performed on the file handle.
-//
-// This class is access by 4 different threads during it's lifetime, namely:
-// 1. Render thread
-//    Thread that runs WebKit objects and construct this class. Updates about
-//    progress for resource loading also happens in this thread.
-// 2. Pipeline thread
-//    Closing thread of the video stack pipeline, it initialized this class
-//    and performs stopping in an orderly fashion.
-// 3. Demuxer thread
-//    Thread created by the pipeline and ask for data from this class.
-//    media::DataSource methods are called from this thread.
-// 4. IO thread
-//    Performs file stream construction and callback of read completion also
-//    comes from this thread.
-//
-// Methods in the class categorized by the thread(s) they are running on:
-//
-// Render thread
-//   +-- DataSourceImpl()
-//   |     Perform construction of this class.
-//   |-- static CreateFactory()
-//   |     Called during construction of this class.
-//   |-- OnInitialize()
-//   |     Task posted by Initialize() to kick start resource loading.
-//   |-- OnCancel()
-//   |     Cancel the resource loading.
-//   |-- OnDownloadProgress()
-//   |     Receives download progress information for the response data file.
-//   |-- OnUploadProgress()
-//   |-- OnReceivedRedirect()
-//   |-- OnReceivedResponse()
-//   |-- OnReceivedData()
-//   |-- OnCompletedRequest()
-//   |-- GetURLForDebugging()
-//   \-- OnDestroy()
-//
-// Pipeline thread
-//   +-- Initialize()
-//   |     Performs initialization of data source in the pipeline.
-//   \-- Stop()
-//         Cease all activities during pipeline tear down.
-//
-// Demuxer thread
-//   +-- Read()
-//   |     Called to read from the media file.
-//   |-- GetPosition()
-//   |     Called to obtain current position in the file.
-//   |-- SetPosition()
-//   |     Performs a seek operation.
-//   |-- GetSize()
-//   |     Retrieve the size of the resource.
-//   \-- IsSeekable()
-//         Returns true if URL is file:/// or else false.
-//
-// IO thread
-//   +-- OnCreateFileStream()
-//   |     Callback for construction of net::FileStream in an IO message loop.
-//   |-- OnReadFileStream()
-//   |     Actual read operation on FileStream performs here.
-//   |-- OnSeekFileStream()
-//   |     Actual seek operation happens here.
-//   \-- OnDidFileStreamRead()
-//         Callback for asynchronous file read completion.
-
-
-#ifndef CHROME_RENDERER_MEDIA_DATA_SOURCE_IMPL_H_
-#define CHROME_RENDERER_MEDIA_DATA_SOURCE_IMPL_H_
-
-#include <string>
-
-#include "base/lock.h"
-#include "base/platform_file.h"
-#include "base/scoped_ptr.h"
-#include "base/waitable_event.h"
-#include "media/base/factory.h"
-#include "media/base/filters.h"
-#include "media/base/media_format.h"
-#include "media/base/pipeline.h"
-#include "net/base/completion_callback.h"
-#include "net/base/file_stream.h"
-#include "webkit/glue/resource_loader_bridge.h"
-
-class WebMediaPlayerDelegateImpl;
-
-class DataSourceImpl : public media::DataSource,
-                       public webkit_glue::ResourceLoaderBridge::Peer {
- public:
-  // Methods called from render thread ----------------------------------------
-  // Static methods for creating this class.
-  static media::FilterFactory* CreateFactory(
-    WebMediaPlayerDelegateImpl* delegate) {
-      return new media::FilterFactoryImpl1<DataSourceImpl,
-        WebMediaPlayerDelegateImpl*>(delegate);
-  }
-
-  // webkit_glue::ResourceLoaderBridge::Peer implementations, receive events
-  // for resource loading.
-  virtual void OnDownloadProgress(uint64 position, uint64 size);
-  virtual void OnUploadProgress(uint64 position, uint64 size);
-  virtual void OnReceivedRedirect(const GURL& new_url);
-  virtual void OnReceivedResponse(
-      const webkit_glue::ResourceLoaderBridge::ResponseInfo& info,
-      bool content_filtered);
-  virtual void OnReceivedData(const char* data, int len);
-  virtual void OnCompletedRequest(const URLRequestStatus& status,
-                                  const std::string& security_info);
-  virtual std::string GetURLForDebugging();
-
-  // Methods called from pipeline thread --------------------------------------
-  virtual bool Initialize(const std::string& url);
-  // media::MediaFilter implementation.
-  virtual void Stop();
-
-  // Methods called from demuxer thread ---------------------------------------
-  // media::DataSource implementation.
-  virtual size_t Read(uint8* data, size_t size);
-  virtual bool GetPosition(int64* position_out);
-  virtual bool SetPosition(int64 position);
-  virtual bool GetSize(int64* size_out);
-  virtual bool IsSeekable();
-
-  const media::MediaFormat& media_format();
-
- private:
-  friend class media::FilterFactoryImpl1<DataSourceImpl,
-                                         WebMediaPlayerDelegateImpl*>;
-  // Call to filter host to trigger an error, be sure not to call this method
-  // while the lock is acquired.
-  void HandleError(media::PipelineError error);
-
-  // Methods called from render thread ----------------------------------------
-  explicit DataSourceImpl(WebMediaPlayerDelegateImpl* delegate);
-  virtual ~DataSourceImpl();
-
-  // Tasks to be posted on render thread.
-  void OnInitialize(std::string uri);
-  void OnCancel();
-  void OnDestroy();
-
-  // Methods called from IO thread --------------------------------------------
-  // Handlers for file reading.
-  void OnCreateFileStream(base::PlatformFile file);
-  void OnReadFileStream(uint8* data, size_t size);
-  void OnSeekFileStream(net::Whence whence, int64 position);
-  void OnDidFileStreamRead(int size);
-
-  media::MediaFormat media_format_;
-
-  // Pointer to the delegate which provides access to RenderView, this is set
-  // in construction and can be accessed in all threads safely.
-  WebMediaPlayerDelegateImpl* delegate_;
-
-  // Message loop of render thread.
-  MessageLoop* render_loop_;
-
-  // A common lock for protecting members accessed by multiple threads.
-  Lock lock_;
-  bool stopped_;
-
-  // URI to the resource being downloaded.
-  std::string uri_;
-
-  // Members for keeping track of downloading progress.
-  base::WaitableEvent download_event_;
-  int64 downloaded_bytes_;
-  int64 total_bytes_;
-  bool total_bytes_known_;
-  bool download_completed_;
-
-  // Members related to resource loading with RenderView.
-  scoped_ptr<webkit_glue::ResourceLoaderBridge> resource_loader_bridge_;
-
-  // Members used for reading.
-  base::WaitableEvent read_event_;
-  net::CompletionCallbackImpl<DataSourceImpl> read_callback_;
-  scoped_ptr<net::FileStream> stream_;
-  size_t last_read_size_;
-  int64 position_;
-  MessageLoop* io_loop_;
-
-  // Events for other operations on stream_.
-  base::WaitableEvent seek_event_;
-
-  DISALLOW_COPY_AND_ASSIGN(DataSourceImpl);
-};
-
-#endif  // CHROME_RENDERER_MEDIA_DATA_SOURCE_IMPL_H_