Reland of Add optional visualization file writers to VideoProcessor tests.

webrtc/test/testsupport/frame_reader.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_reader.h"
-
-#include <assert.h>
-
-#include "webrtc/api/video/i420_buffer.h"
-#include "webrtc/test/frame_utils.h"
-#include "webrtc/test/testsupport/fileutils.h"
-
-namespace webrtc {
-namespace test {
-
-FrameReaderImpl::FrameReaderImpl(std::string input_filename,
-                                 int width, int height)
-    : input_filename_(input_filename),
-      width_(width), height_(height),
-      input_file_(NULL) {
-}
-
-FrameReaderImpl::~FrameReaderImpl() {
-  Close();
-}
-
-bool FrameReaderImpl::Init() {
-  if (width_ <= 0 || height_ <= 0) {
-    fprintf(stderr, "Frame width and height must be >0, was %d x %d\n",
-            width_, height_);
-    return false;
-  }
-  frame_length_in_bytes_ =
-      width_ * height_ + 2 * ((width_ + 1) / 2) * ((height_ + 1) / 2);
-
-  input_file_ = fopen(input_filename_.c_str(), "rb");
-  if (input_file_ == NULL) {
-    fprintf(stderr, "Couldn't open input file for reading: %s\n",
-            input_filename_.c_str());
-    return false;
-  }
-  // Calculate total number of frames.
-  size_t source_file_size = GetFileSize(input_filename_);
-  if (source_file_size <= 0u) {
-    fprintf(stderr, "Found empty file: %s\n", input_filename_.c_str());
-    return false;
-  }
-  number_of_frames_ = static_cast<int>(source_file_size /
-                                       frame_length_in_bytes_);
-  return true;
-}
-
-void FrameReaderImpl::Close() {
-  if (input_file_ != NULL) {
-    fclose(input_file_);
-    input_file_ = NULL;
-  }
-}
-
-rtc::scoped_refptr<I420Buffer> FrameReaderImpl::ReadFrame() {
-  if (input_file_ == NULL) {
-    fprintf(stderr, "FrameReader is not initialized (input file is NULL)\n");
-    return nullptr;
-  }
-  rtc::scoped_refptr<I420Buffer> buffer(
-      ReadI420Buffer(width_, height_, input_file_));
-  if (!buffer && ferror(input_file_)) {
-    fprintf(stderr, "Error reading from input file: %s\n",
-            input_filename_.c_str());
-  }
-  return buffer;
-}
-
-size_t FrameReaderImpl::FrameLength() { return frame_length_in_bytes_; }
-int FrameReaderImpl::NumberOfFrames() { return number_of_frames_; }
-
-}  // namespace test
-}  // namespace webrtc