ivf_file_writer.h - mozsearch

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/*

 *  Copyright (c) 2016 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 MODULES_VIDEO_CODING_UTILITY_IVF_FILE_WRITER_H_

#define MODULES_VIDEO_CODING_UTILITY_IVF_FILE_WRITER_H_

#include <stddef.h>

#include <stdint.h>

#include <memory>

#include "absl/strings/string_view.h"

#include "api/video/encoded_image.h"

#include "api/video/video_codec_type.h"

#include "rtc_base/numerics/sequence_number_unwrapper.h"

#include "rtc_base/system/file_wrapper.h"

namespace webrtc {

class IvfFileWriter {

 public:

  // Takes ownership of the file, which will be closed either through

  // Close or ~IvfFileWriter. If writing a frame would take the file above the

  // `byte_limit` the file will be closed, the write (and all future writes)

  // will fail. A `byte_limit` of 0 is equivalent to no limit.

  static std::unique_ptr<IvfFileWriter> Wrap(FileWrapper file,

                                             size_t byte_limit);

  static std::unique_ptr<IvfFileWriter> Wrap(absl::string_view filename,

                                             size_t byte_limit);

  ~IvfFileWriter();

  IvfFileWriter(const IvfFileWriter&) = delete;

  IvfFileWriter& operator=(const IvfFileWriter&) = delete;

  bool WriteFrame(const EncodedImage& encoded_image, VideoCodecType codec_type);

  bool Close();

 private:

  explicit IvfFileWriter(FileWrapper file, size_t byte_limit);

  bool WriteHeader();

  bool InitFromFirstFrame(const EncodedImage& encoded_image,

                          VideoCodecType codec_type);

  bool WriteOneSpatialLayer(int64_t timestamp,

                            const uint8_t* data,

                            size_t size);

  VideoCodecType codec_type_;

  size_t bytes_written_;

  size_t byte_limit_;

  size_t num_frames_;

  uint16_t width_;

  uint16_t height_;

  int64_t last_timestamp_;

  bool using_capture_timestamps_;

  RtpTimestampUnwrapper wrap_handler_;

  FileWrapper file_;

};

}  // namespace webrtc

#endif  // MODULES_VIDEO_CODING_UTILITY_IVF_FILE_WRITER_H_