Revert EVS revisions 209760, 298753, 213143.

media/video/encoded_video_source.h

-// Copyright 2013 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 MEDIA_VIDEO_ENCODED_VIDEO_SOURCE_H_
-#define MEDIA_VIDEO_ENCODED_VIDEO_SOURCE_H_
-
-#include "base/memory/ref_counted.h"
-#include "media/base/encoded_bitstream_buffer.h"
-#include "media/video/video_encode_types.h"
-
-namespace media {
-
-// Class to represent any encoded video source. Anything that provides encoded
-// video can be an EncodedVideoSource. Notable examples of this can be video
-// encoder and webcam that has encoding capabilities.
-// TODO(hshi): merge this with VEA interface. http://crbug.com/248334.
-class EncodedVideoSource {
- public:
-  class Client {
-   public:
-    // Notifies client that bitstream is opened successfully. The |params|
-    // contains the actual encoding parameters chosen by the browser process.
-    // It may be different from the params requested in OpenBitstream().
-    virtual void OnOpened(const VideoEncodingParameters& params) = 0;
-
-    // Notifies client that bitstream is closed. After this call it is
-    // guaranteed that client will not receive further calls.
-    virtual void OnClosed() = 0;
-
-    // Delivers an encoded bitstream buffer to the client.
-    virtual void OnBufferReady(
-        scoped_refptr<const EncodedBitstreamBuffer> buffer) = 0;
-
-    // Notifies client that encoding parameters has changed. The |params|
-    // contains the current encoding parameters chosen by the browser process.
-    // It may be different from the params requested in TrySetBitstreamConfig().
-    virtual void OnConfigChanged(
-        const RuntimeVideoEncodingParameters& params) = 0;
-  };
-
-  // Callback is invoked once RequestCapabilities() is complete.
-  typedef base::Callback<void(const VideoEncodingCapabilities& capabilities)>
-      RequestCapabilitiesCallback;
-
-  // RequestCapabilities initiates an asynchronous query for the types of
-  // encoded bitstream supported by the encoder. This call should be invoked
-  // only once. EncodedVideoSource will invoke |callback| when capabilities
-  // become available.
-  virtual void RequestCapabilities(
-      const RequestCapabilitiesCallback& callback) = 0;
-
-  // OpenBitstream opens the bitstream on the encoded video source. Only one
-  // bitstream can be opened for an encoded video source.
-  virtual void OpenBitstream(Client* client,
-                             const VideoEncodingParameters& params) = 0;
-
-  // CloseBitstream closes the bitstream.
-  virtual void CloseBitstream() = 0;
-
-  // ReturnBitstreamBuffer notifies that the data within the buffer has been
-  // processed and it can be reused to encode upcoming bitstream.
-  virtual void ReturnBitstreamBuffer(
-      scoped_refptr<const media::EncodedBitstreamBuffer> buffer) = 0;
-
-  // TrySetBitstreamConfig requests to change encoding parameters. Old config
-  // must be considered valid until OnConfigChanged is invoked on the client
-  // signaling successful change.
-  virtual void TrySetBitstreamConfig(
-      const RuntimeVideoEncodingParameters& params) = 0;
-
-  // RequestKeyFrame requests a key frame.
-  virtual void RequestKeyFrame() = 0;
-};
-
-}  // namespace media
-
-#endif  // MEDIA_VIDEO_ENCODED_VIDEO_SOURCE_H_
-