Reland of Add optional visualization file writers to VideoProcessor tests.

webrtc/test/testsupport/yuv_frame_reader.cc

 /*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *  Copyright (c) 2017 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)
+YuvFrameReaderImpl::YuvFrameReaderImpl(std::string input_filename,
+                                       int width,
+                                       int height)
     : input_filename_(input_filename),
-      width_(width), height_(height),
-      input_file_(NULL) {
-}
+      frame_length_in_bytes_(0),
+      width_(width),
+      height_(height),
+      number_of_frames_(-1),
+      input_file_(nullptr) {}
 
-FrameReaderImpl::~FrameReaderImpl() {
+YuvFrameReaderImpl::~YuvFrameReaderImpl() {
   Close();
 }
 
-bool FrameReaderImpl::Init() {
+bool YuvFrameReaderImpl::Init() {
   if (width_ <= 0 || height_ <= 0) {
-    fprintf(stderr, "Frame width and height must be >0, was %d x %d\n",
-            width_, height_);
+    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) {
+  if (input_file_ == nullptr) {
     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_);
+  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");
+rtc::scoped_refptr<I420Buffer> YuvFrameReaderImpl::ReadFrame() {
+  if (input_file_ == nullptr) {
+    fprintf(stderr,
+            "YuvFrameReaderImpl 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_; }
+void YuvFrameReaderImpl::Close() {
+  if (input_file_ != nullptr) {
+    fclose(input_file_);
+    input_file_ = nullptr;
+  }
+}
+
+size_t YuvFrameReaderImpl::FrameLength() {
+  return frame_length_in_bytes_;
+}
+
+int YuvFrameReaderImpl::NumberOfFrames() {
+  return number_of_frames_;
+}
 
 }  // namespace test
 }  // namespace webrtc