webrtc/modules/video_processing/include/video_processing.h

/*
 *  Copyright (c) 2011 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 WEBRTC_MODULES_VIDEO_PROCESSING_INCLUDE_VIDEO_PROCESSING_H_
#define WEBRTC_MODULES_VIDEO_PROCESSING_INCLUDE_VIDEO_PROCESSING_H_

#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/modules/video_processing/include/video_processing_defines.h"
#include "webrtc/video_frame.h"

// The module is largely intended to process video streams, except functionality
// provided by static functions which operate independent of previous frames. It
// is recommended, but not required that a unique instance be used for each
// concurrently processed stream. Similarly, it is recommended to call Reset()
// before switching to a new stream, but this is not absolutely required.
//
// The module provides basic thread safety by permitting only a single function
// to execute concurrently.

namespace webrtc {

class VideoProcessing {
 public:
  static VideoProcessing* Create();
  virtual ~VideoProcessing() {}

  // The following functions refer to the pre-processor unit within VPM. The
  // pre-processor perfoms spatial/temporal decimation and content analysis on
  // the frames prior to encoding.

  // Enable/disable temporal decimation
  virtual void EnableTemporalDecimation(bool enable) = 0;

  virtual int32_t SetTargetResolution(uint32_t width,
                                      uint32_t height,
                                      uint32_t frame_rate) = 0;

  virtual uint32_t GetDecimatedFrameRate() = 0;
  virtual uint32_t GetDecimatedWidth() const = 0;
  virtual uint32_t GetDecimatedHeight() const = 0;

  // Set the spatial resampling settings of the VPM according to
  // VideoFrameResampling.
  virtual void SetInputFrameResampleMode(
      VideoFrameResampling resampling_mode) = 0;

  virtual void EnableDenoising(bool enable) = 0;
  virtual const VideoFrame* PreprocessFrame(const VideoFrame& frame) = 0;
};

}  // namespace webrtc

#endif  // WEBRTC_MODULES_VIDEO_PROCESSING_INCLUDE_VIDEO_PROCESSING_H_