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+/*
+ *  Copyright (c) 2012 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 TEST_TESTSUPPORT_FRAME_WRITER_H_
+#define TEST_TESTSUPPORT_FRAME_WRITER_H_
+
+#include <stdio.h>
+
+#include <string>
+
+#include "api/video/video_frame.h"
+
+namespace webrtc {
+namespace test {
+
+// Handles writing of video files.
+class FrameWriter {
+ public:
+  virtual ~FrameWriter() {}
+
+  // Initializes the file handler, i.e. opens the input and output files etc.
+  // This must be called before reading or writing frames has started.
+  // Returns false if an error has occurred, in addition to printing to stderr.
+  virtual bool Init() = 0;
+
+  // Writes a frame of the configured frame length to the output file.
+  // Returns true if the write was successful, false otherwise.
+  virtual bool WriteFrame(const uint8_t* frame_buffer) = 0;
+
+  // Closes the output file if open. Essentially makes this class impossible
+  // to use anymore. Will also be invoked by the destructor.
+  virtual void Close() = 0;
+
+  // Frame length in bytes of a single frame image.
+  virtual size_t FrameLength() = 0;
+};
+
+// Writes raw I420 frames in sequence.
+class YuvFrameWriterImpl : public FrameWriter {
+ public:
+  // Creates a file handler. The input file is assumed to exist and be readable
+  // and the output file must be writable.
+  // Parameters:
+  //   output_filename         The file to write. Will be overwritten if already
+  //                           existing.
+  //   width, height           Size of each frame to read.
+  YuvFrameWriterImpl(std::string output_filename, int width, int height);
+  ~YuvFrameWriterImpl() override;
+  bool Init() override;
+  bool WriteFrame(const uint8_t* frame_buffer) override;
+  void Close() override;
+  size_t FrameLength() override;
+
+ protected:
+  const std::string output_filename_;
+  size_t frame_length_in_bytes_;
+  const int width_;
+  const int height_;
+  FILE* output_file_;
+};
+
+// Writes raw I420 frames in sequence, but with Y4M file and frame headers for
+// more convenient playback in external media players.
+class Y4mFrameWriterImpl : public YuvFrameWriterImpl {
+ public:
+  Y4mFrameWriterImpl(std::string output_filename,
+                     int width,
+                     int height,
+                     int frame_rate);
+  ~Y4mFrameWriterImpl() override;
+  bool Init() override;
+  bool WriteFrame(const uint8_t* frame_buffer) override;
+
+ private:
+  const int frame_rate_;
+};
+
+// LibJpeg is not available on iOS. This class will do nothing on iOS.
+class JpegFrameWriter {
+ public:
+  JpegFrameWriter(const std::string& output_filename);
+  // Quality can be from 0 (worst) to 100 (best). Best quality is still lossy.
+  // WriteFrame can be called only once. Subsequent calls will fail.
+  bool WriteFrame(const VideoFrame& input_frame, int quality);
+
+#if !defined(WEBRTC_IOS)
+ private:
+  bool frame_written_;
+  const std::string output_filename_;
+  FILE* output_file_;
+#endif
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // TEST_TESTSUPPORT_FRAME_WRITER_H_