Let ViEEncoder handle resolution changes.

webrtc/test/encoder_settings.cc

 /*
  *  Copyright (c) 2014 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/encoder_settings.h"
 
-#include <assert.h>
-#include <string.h>
+#include <algorithm>
+#include <string>
 
 #include "webrtc/test/fake_decoder.h"
 #include "webrtc/video_decoder.h"
 
 namespace webrtc {
 namespace test {
-std::vector<VideoStream> CreateVideoStreams(size_t num_streams) {
-  assert(num_streams > 0);
 
-  // Add more streams to the settings above with reasonable values if required.
-  static const size_t kNumSettings = 3;
-  assert(num_streams <= kNumSettings);
+const size_t DefaultVideoStreamFactory::kMaxNumberOfStreams;
+constexpr int DefaultVideoStreamFactory::kMaxBitratePerStream[];
+constexpr int DefaultVideoStreamFactory::kDefaultMinBitratePerStream[];
 
-  std::vector<VideoStream> stream_settings(kNumSettings);
+// static
+std::vector<VideoStream> CreateVideoStreams(
+    int width,
+    int height,
+    const webrtc::VideoEncoderConfig& encoder_config) {
+  RTC_DCHECK(encoder_config.number_of_streams <=
+             DefaultVideoStreamFactory::kMaxNumberOfStreams);
 
-  stream_settings[0].width = 320;
-  stream_settings[0].height = 180;
-  stream_settings[0].max_framerate = 30;
-  stream_settings[0].min_bitrate_bps = 50000;
-  stream_settings[0].target_bitrate_bps = stream_settings[0].max_bitrate_bps =
-      150000;
-  stream_settings[0].max_qp = 56;
+  std::vector<VideoStream> stream_settings(encoder_config.number_of_streams);
+  int bitrate_left_bps = encoder_config.max_bitrate_bps;
 
-  stream_settings[1].width = 640;
-  stream_settings[1].height = 360;
-  stream_settings[1].max_framerate = 30;
-  stream_settings[1].min_bitrate_bps = 200000;
-  stream_settings[1].target_bitrate_bps = stream_settings[1].max_bitrate_bps =
-      450000;
-  stream_settings[1].max_qp = 56;
+  for (size_t i = 0; i < encoder_config.number_of_streams; ++i) {
+    stream_settings[i].width =
+        (i + 1) * width / encoder_config.number_of_streams;
+    stream_settings[i].height =
+        (i + 1) * height / encoder_config.number_of_streams;
+    stream_settings[i].max_framerate = 30;
+    stream_settings[i].min_bitrate_bps =
+        DefaultVideoStreamFactory::kDefaultMinBitratePerStream[i];
+    stream_settings[i].target_bitrate_bps = stream_settings[i].max_bitrate_bps =
+        std::min(bitrate_left_bps,
+                 DefaultVideoStreamFactory::kMaxBitratePerStream[i]);
+    stream_settings[i].max_qp = 56;
+    bitrate_left_bps -= stream_settings[i].target_bitrate_bps;
+  }
 
-  stream_settings[2].width = 1280;
-  stream_settings[2].height = 720;
-  stream_settings[2].max_framerate = 30;
-  stream_settings[2].min_bitrate_bps = 700000;
-  stream_settings[2].target_bitrate_bps = stream_settings[2].max_bitrate_bps =
-      1500000;
-  stream_settings[2].max_qp = 56;
-  stream_settings.resize(num_streams);
+  stream_settings[encoder_config.number_of_streams - 1].max_bitrate_bps +=
+      bitrate_left_bps;
+
   return stream_settings;
 }
 
+DefaultVideoStreamFactory::DefaultVideoStreamFactory() {}
+
+std::vector<VideoStream> DefaultVideoStreamFactory::CreateEncoderStreams(
+    int width,
+    int height,
+    const webrtc::VideoEncoderConfig& encoder_config) {
+  return CreateVideoStreams(width, height, encoder_config);
+}
+
+void FillEncoderConfiguration(size_t num_streams,
+                              VideoEncoderConfig* configuration) {
+  RTC_DCHECK_LE(num_streams, DefaultVideoStreamFactory::kMaxNumberOfStreams);
+
+  configuration->number_of_streams = num_streams;
+  configuration->encoder_stream_factory =
+      new rtc::RefCountedObject<DefaultVideoStreamFactory>();
+  configuration->max_bitrate_bps = 0;
+  for (size_t i = 0; i < num_streams; ++i) {
+    configuration->max_bitrate_bps +=
+        DefaultVideoStreamFactory::kMaxBitratePerStream[i];
+  }
+}
+
 VideoReceiveStream::Decoder CreateMatchingDecoder(
     const VideoSendStream::Config::EncoderSettings& encoder_settings) {
   VideoReceiveStream::Decoder decoder;
   decoder.payload_type = encoder_settings.payload_type;
   decoder.payload_name = encoder_settings.payload_name;
   if (encoder_settings.payload_name == "H264") {
     decoder.decoder = VideoDecoder::Create(VideoDecoder::kH264);
   } else if (encoder_settings.payload_name == "VP8") {
     decoder.decoder = VideoDecoder::Create(VideoDecoder::kVp8);
   } else if (encoder_settings.payload_name == "VP9") {
     decoder.decoder = VideoDecoder::Create(VideoDecoder::kVp9);
   } else {
     decoder.decoder = new FakeDecoder();
   }
   return decoder;
 }
 }  // namespace test
 }  // namespace webrtc