New helper function test::ReadI420Buffer, refactor FrameReader to use it.

webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc

 /*
  *  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.
  */
 
@@ skipping 146 matching lines @@
   Vp8SequenceCoderEncodeCallback encoder_callback(encoded_file);
   encoder->RegisterEncodeCompleteCallback(&encoder_callback);
   Vp8SequenceCoderDecodeCallback decoder_callback(output_file);
   decoder->RegisterDecodeCompleteCallback(&decoder_callback);
   // Read->Encode->Decode sequence.
   // num_frames = -1 implies unlimited encoding (entire sequence).
   int64_t starttime = rtc::TimeMillis();
   int frame_cnt = 1;
   int frames_processed = 0;
   input_frame.CreateEmptyFrame(width, height, width, half_width, half_width);
-  while (!feof(input_file) &&
-         (num_frames == -1 || frames_processed < num_frames)) {
-    if (fread(frame_buffer.get(), 1, length, input_file) != length)
-      continue;
+  while (num_frames == -1 || frames_processed < num_frames) {
+    rtc::scoped_refptr<VideoFrameBuffer> buffer(
+        test::ReadI420Buffer(width, height, input_file));
+    if (!buffer) {
+      // EOF or read error.
+      break;
+    }
     if (frame_cnt >= start_frame) {
-      webrtc::ConvertToI420(webrtc::kI420, frame_buffer.get(), 0, 0, width,
-                            height, 0, webrtc::kVideoRotation_0, &input_frame);
-      encoder->Encode(input_frame, NULL, NULL);
+      encoder->Encode(VideoFrame(buffer, webrtc::kVideoRotation_0, 0),
+                      NULL, NULL);
       decoder->Decode(encoder_callback.encoded_image(), false, NULL);
       ++frames_processed;
     }
     ++frame_cnt;
   }
   printf("\nProcessed %d frames\n", frames_processed);
   int64_t endtime = rtc::TimeMillis();
   int64_t totalExecutionTime = endtime - starttime;
   printf("Total execution time: %.2lf ms\n",
          static_cast<double>(totalExecutionTime));
@@ skipping 54 matching lines @@
 
   parser.ProcessFlags();
   if (parser.GetFlag("help") == "true") {
     parser.PrintUsageMessage();
     exit(EXIT_SUCCESS);
   }
   parser.PrintEnteredFlags();
 
   return SequenceCoder(&parser);
 }