Step #2: Add batch mode to VideoProcessor integration tests.

webrtc/modules/video_coding/codecs/test/videoprocessor.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 200 matching lines @@
 void VideoProcessorImpl::SetRates(int bit_rate, int frame_rate) {
   int set_rates_result = encoder_->SetRateAllocation(
       bitrate_allocator_->GetAllocation(bit_rate * 1000, frame_rate),
       frame_rate);
   RTC_DCHECK_GE(set_rates_result, 0)
       << "Failed to update encoder with new rate " << bit_rate;
   num_dropped_frames_ = 0;
   num_spatial_resizes_ = 0;
 }
 
-// TODO(brandtr): Update implementation of EncodedFrameSize and EncodedFrameType
-// to support batch processing in the caller.
-size_t VideoProcessorImpl::EncodedFrameSize() {
-  RTC_DCHECK(!frame_infos_.empty());
-  return frame_infos_.back().encoded_frame_size;
+size_t VideoProcessorImpl::EncodedFrameSize(int frame_number) {
+  RTC_DCHECK_LT(frame_number, frame_infos_.size());
+  return frame_infos_[frame_number].encoded_frame_size;
 }
 
-FrameType VideoProcessorImpl::EncodedFrameType() {
-  RTC_DCHECK(!frame_infos_.empty());
-  return frame_infos_.back().encoded_frame_type;
+FrameType VideoProcessorImpl::EncodedFrameType(int frame_number) {
+  RTC_DCHECK_LT(frame_number, frame_infos_.size());
+  return frame_infos_[frame_number].encoded_frame_type;
 }
 
 int VideoProcessorImpl::NumberDroppedFrames() {
   return num_dropped_frames_;
 }
 
 int VideoProcessorImpl::NumberSpatialResizes() {
   return num_spatial_resizes_;
 }
 
@@ skipping 252 matching lines @@
   if (decoded_frame_writer_) {
     RTC_DCHECK_EQ(extracted_length, decoded_frame_writer_->FrameLength());
     RTC_CHECK(decoded_frame_writer_->WriteFrame(extracted_buffer.data()));
   }
 
   last_decoded_frame_buffer_ = std::move(extracted_buffer);
 }
 
 }  // namespace test
 }  // namespace webrtc