Reland of Add optional visualization file writers to VideoProcessor tests.

webrtc/test/testsupport/frame_writer.cc

-/*
- *  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.
- */
-
-#include "webrtc/test/testsupport/frame_writer.h"
-
-#include <assert.h>
-
-namespace webrtc {
-namespace test {
-
-FrameWriterImpl::FrameWriterImpl(std::string output_filename,
-                                 size_t frame_length_in_bytes)
-    : output_filename_(output_filename),
-      frame_length_in_bytes_(frame_length_in_bytes),
-      output_file_(NULL) {
-}
-
-FrameWriterImpl::~FrameWriterImpl() {
-  Close();
-}
-
-bool FrameWriterImpl::Init() {
-  if (frame_length_in_bytes_ <= 0) {
-    fprintf(stderr, "Frame length must be >0, was %zu\n",
-            frame_length_in_bytes_);
-    return false;
-  }
-  output_file_ = fopen(output_filename_.c_str(), "wb");
-  if (output_file_ == NULL) {
-    fprintf(stderr, "Couldn't open output file for writing: %s\n",
-            output_filename_.c_str());
-    return false;
-  }
-  return true;
-}
-
-void FrameWriterImpl::Close() {
-  if (output_file_ != NULL) {
-    fclose(output_file_);
-    output_file_ = NULL;
-  }
-}
-
-size_t FrameWriterImpl::FrameLength() { return frame_length_in_bytes_; }
-
-bool FrameWriterImpl::WriteFrame(uint8_t* frame_buffer) {
-  assert(frame_buffer);
-  if (output_file_ == NULL) {
-    fprintf(stderr, "FrameWriter is not initialized (output file is NULL)\n");
-    return false;
-  }
-  size_t bytes_written = fwrite(frame_buffer, 1, frame_length_in_bytes_,
-                                output_file_);
-  if (bytes_written != frame_length_in_bytes_) {
-    fprintf(stderr, "Failed to write %zu bytes to file %s\n",
-            frame_length_in_bytes_, output_filename_.c_str());
-    return false;
-  }
-  return true;
-}
-
-}  // namespace test
-}  // namespace webrtc