Rename "UpdateLayerConfig" to "NextFrameConfig"

Rename "UpdateLayerConfig" to the more appropriate "NextFrameConfig".
Also update some comments in vp8_frame_buffer_controller.h.

Bug: None
Change-Id: Iba8227f84e33e5ebd28d2eeb10fe03e776036603
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133202
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27660}
diff --git a/api/video_codecs/vp8_frame_buffer_controller.h b/api/video_codecs/vp8_frame_buffer_controller.h
index f3d2b1a..e41df8e 100644
--- a/api/video_codecs/vp8_frame_buffer_controller.h
+++ b/api/video_codecs/vp8_frame_buffer_controller.h
@@ -25,7 +25,7 @@
 // * Vp8FrameBufferController is not thread safe, synchronization is the
 //   caller's responsibility.
 // * The encoder is assumed to encode all frames in order, and callbacks to
-//   PopulateCodecSpecific() / FrameEncoded() must happen in the same order.
+//   PopulateCodecSpecific() / OnEncodeDone() must happen in the same order.
 //
 // This means that in the case of pipelining encoders, it is OK to have a chain
 // of calls such as this:
@@ -38,11 +38,15 @@
 // - OnEncodeDone(timestampB, 0, ...)
 // - OnEncodeDone(timestampC, 1234, ...)
 // Note that UpdateLayerConfig() for a new frame can happen before
-// FrameEncoded() for a previous one, but calls themselves must be both
+// OnEncodeDone() for a previous one, but calls themselves must be both
 // synchronized (e.g. run on a task queue) and in order (per type).
+//
+// TODO(eladalon): Revise comment (referring to PopulateCodecSpecific in this
+// context is not very meaningful).
 
 struct CodecSpecificInfo;
 
+// TODO(eladalon): This configuration is temporal-layers specific; refactor.
 struct Vp8EncoderConfig {
   static constexpr size_t kMaxPeriodicity = 16;
   static constexpr size_t kMaxLayers = 5;
@@ -90,37 +94,36 @@
   //     OnEncodeDone() again when the frame has actually been encoded.
   virtual bool SupportsEncoderFrameDropping(size_t stream_index) const = 0;
 
-  // New target bitrate, per temporal layer.
+  // New target bitrate for a stream (each entry in
+  // |bitrates_bps| is for another temporal layer).
   virtual void OnRatesUpdated(size_t stream_index,
                               const std::vector<uint32_t>& bitrates_bps,
                               int framerate_fps) = 0;
 
   // Called by the encoder before encoding a frame. |cfg| contains the current
-  // configuration. If the TemporalLayers instance wishes any part of that
-  // to be changed before the encode step, |cfg| should be changed and then
-  // return true. If false is returned, the encoder will proceed without
-  // updating the configuration.
+  // configuration. If the encoder wishes any part of that to be changed before
+  // the encode step, |cfg| should be changed and then return true. If false is
+  // returned, the encoder will proceed without updating the configuration.
   virtual bool UpdateConfiguration(size_t stream_index,
                                    Vp8EncoderConfig* cfg) = 0;
 
-  // Returns the recommended VP8 encode flags needed, and moves the temporal
-  // pattern to the next frame.
+  // Returns the recommended VP8 encode flags needed.
   // The timestamp may be used as both a time and a unique identifier, and so
   // the caller must make sure no two frames use the same timestamp.
   // The timestamp uses a 90kHz RTP clock.
   // After calling this method, first call the actual encoder with the provided
   // frame configuration, and then OnEncodeDone() below.
-  virtual Vp8FrameConfig UpdateLayerConfig(size_t stream_index,
-                                           uint32_t rtp_timestamp) = 0;
+  virtual Vp8FrameConfig NextFrameConfig(size_t stream_index,
+                                         uint32_t rtp_timestamp) = 0;
 
   // Called after the encode step is done. |rtp_timestamp| must match the
   // parameter use in the UpdateLayerConfig() call.
   // |is_keyframe| must be true iff the encoder decided to encode this frame as
   // a keyframe.
-  // If |info| is not null, the TemporalLayers instance may update |info| with
-  // codec specific data such as temporal id.
-  // |qp| should indicate the frame-level QP this frame was encoded at. If the
-  // encoder does not support extracting this, |qp| should be set to 0.
+  // If |info| is not null, the encoder may update |info| with codec specific
+  // data such as temporal id. |qp| should indicate the frame-level QP this
+  // frame was encoded at. If the encoder does not support extracting this, |qp|
+  // should be set to 0.
   virtual void OnEncodeDone(size_t stream_index,
                             uint32_t rtp_timestamp,
                             size_t size_bytes,
diff --git a/api/video_codecs/vp8_temporal_layers.cc b/api/video_codecs/vp8_temporal_layers.cc
index 7a9cf37..7f7d8ad 100644
--- a/api/video_codecs/vp8_temporal_layers.cc
+++ b/api/video_codecs/vp8_temporal_layers.cc
@@ -53,10 +53,10 @@
   return controllers_[stream_index]->UpdateConfiguration(0, cfg);
 }
 
-Vp8FrameConfig Vp8TemporalLayers::UpdateLayerConfig(size_t stream_index,
-                                                    uint32_t rtp_timestamp) {
+Vp8FrameConfig Vp8TemporalLayers::NextFrameConfig(size_t stream_index,
+                                                  uint32_t rtp_timestamp) {
   RTC_DCHECK_LT(stream_index, controllers_.size());
-  return controllers_[stream_index]->UpdateLayerConfig(0, rtp_timestamp);
+  return controllers_[stream_index]->NextFrameConfig(0, rtp_timestamp);
 }
 
 void Vp8TemporalLayers::OnEncodeDone(size_t stream_index,
diff --git a/api/video_codecs/vp8_temporal_layers.h b/api/video_codecs/vp8_temporal_layers.h
index f02d288..3864705 100644
--- a/api/video_codecs/vp8_temporal_layers.h
+++ b/api/video_codecs/vp8_temporal_layers.h
@@ -45,8 +45,8 @@
 
   bool UpdateConfiguration(size_t stream_index, Vp8EncoderConfig* cfg) override;
 
-  Vp8FrameConfig UpdateLayerConfig(size_t stream_index,
-                                   uint32_t rtp_timestamp) override;
+  Vp8FrameConfig NextFrameConfig(size_t stream_index,
+                                 uint32_t rtp_timestamp) override;
 
   void OnEncodeDone(size_t stream_index,
                     uint32_t rtp_timestamp,
diff --git a/modules/video_coding/codecs/vp8/default_temporal_layers.cc b/modules/video_coding/codecs/vp8/default_temporal_layers.cc
index 31298fe..e315dc4 100644
--- a/modules/video_coding/codecs/vp8/default_temporal_layers.cc
+++ b/modules/video_coding/codecs/vp8/default_temporal_layers.cc
@@ -330,8 +330,8 @@
   return true;
 }
 
-Vp8FrameConfig DefaultTemporalLayers::UpdateLayerConfig(size_t stream_index,
-                                                        uint32_t timestamp) {
+Vp8FrameConfig DefaultTemporalLayers::NextFrameConfig(size_t stream_index,
+                                                      uint32_t timestamp) {
   RTC_DCHECK_LT(stream_index, StreamCount());
   RTC_DCHECK_GT(num_layers_, 0);
   RTC_DCHECK_GT(temporal_pattern_.size(), 0);
diff --git a/modules/video_coding/codecs/vp8/default_temporal_layers.h b/modules/video_coding/codecs/vp8/default_temporal_layers.h
index 7a47650..34ed711 100644
--- a/modules/video_coding/codecs/vp8/default_temporal_layers.h
+++ b/modules/video_coding/codecs/vp8/default_temporal_layers.h
@@ -40,8 +40,8 @@
 
   // Returns the recommended VP8 encode flags needed. May refresh the decoder
   // and/or update the reference buffers.
-  Vp8FrameConfig UpdateLayerConfig(size_t stream_index,
-                                   uint32_t timestamp) override;
+  Vp8FrameConfig NextFrameConfig(size_t stream_index,
+                                 uint32_t timestamp) override;
 
   // New target bitrate, per temporal layer.
   void OnRatesUpdated(size_t stream_index,
@@ -108,7 +108,7 @@
     // Bitmask of Vp8BufferReference flags, indicating which buffers this frame
     // updates.
     uint8_t updated_buffer_mask = 0;
-    // The frame config return by UpdateLayerConfig() for this frame.
+    // The frame config returned by NextFrameConfig() for this frame.
     DependencyInfo dependency_info;
   };
   // Map from rtp timestamp to pending frame status. Reset on pattern loop.
diff --git a/modules/video_coding/codecs/vp8/default_temporal_layers_unittest.cc b/modules/video_coding/codecs/vp8/default_temporal_layers_unittest.cc
index 54e71c4..8f01e59 100644
--- a/modules/video_coding/codecs/vp8/default_temporal_layers_unittest.cc
+++ b/modules/video_coding/codecs/vp8/default_temporal_layers_unittest.cc
@@ -142,7 +142,7 @@
   for (size_t i = 0; i < kPatternSize * kRepetitions; ++i) {
     const size_t ind = i % kPatternSize;
     CodecSpecificInfo info;
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
     EXPECT_EQ(expected_flags[ind], LibvpxVp8Encoder::EncodeFlags(tl_config))
         << i;
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, i == 0, kDefaultQp,
@@ -197,7 +197,7 @@
   unsigned int timestamp = 0;
   for (int i = 0; i < 16; ++i) {
     CodecSpecificInfo info;
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
     EXPECT_EQ(expected_flags[i], LibvpxVp8Encoder::EncodeFlags(tl_config)) << i;
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, i == 0, kDefaultQp,
                     &info);
@@ -240,7 +240,7 @@
   unsigned int timestamp = 0;
   for (int i = 0; i < 8; ++i) {
     CodecSpecificInfo info;
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
     EXPECT_EQ(expected_flags[i], LibvpxVp8Encoder::EncodeFlags(tl_config)) << i;
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, i == 0, kDefaultQp,
                     &info);
@@ -272,19 +272,19 @@
 
   // Start with a key-frame. tl_config flags can be ignored.
   uint32_t timestamp = 0;
-  Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+  Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame. First one only references TL0. Updates altref.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_EQ(tl_config.first_reference, Vp8BufferReference::kLast);
   EXPECT_EQ(tl_config.second_reference, Vp8BufferReference::kNone);
 
   // TL1 frame. Can only reference TL0. Updated golden.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_EQ(tl_config.first_reference, Vp8BufferReference::kLast);
@@ -292,7 +292,7 @@
 
   // TL2 frame. Can reference all three buffers. Golden was the last to be
   // updated, the next to last was altref.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_EQ(tl_config.first_reference, Vp8BufferReference::kGolden);
@@ -316,24 +316,24 @@
 
   // Start with a key-frame. tl_config flags can be ignored.
   uint32_t timestamp = 0;
-  Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+  Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame. First one only references TL0. Updates altref.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_EQ(tl_config.first_reference, Vp8BufferReference::kLast);
   EXPECT_EQ(tl_config.second_reference, Vp8BufferReference::kNone);
 
   // Dropped TL1 frame. Can only reference TL0. Should have updated golden.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, 0, false, 0, nullptr);
 
   // TL2 frame. Can normally reference all three buffers, but golden has not
   // been populated this cycle. Altref was last to be updated, before that last.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_EQ(tl_config.first_reference, Vp8BufferReference::kAltref);
@@ -378,7 +378,7 @@
   uint32_t timestamp = 0;
   for (int i = 0; i < 16; ++i) {
     CodecSpecificInfo info;
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
     EXPECT_EQ(expected_flags[i], LibvpxVp8Encoder::EncodeFlags(tl_config)) << i;
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, i == 0, kDefaultQp,
                     &info);
@@ -409,21 +409,21 @@
 
   // Start with a keyframe.
   uint32_t timestamp = 0;
-  Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+  Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Dropped TL2 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, 0, false, 0, nullptr);
 
   // Dropped TL1 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, 0, false, 0, nullptr);
 
   // TL2 frame. Can reference all three buffers, valid since golden and altref
   // both contain the last keyframe.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
@@ -433,23 +433,23 @@
   // Restart of cycle!
 
   // TL0 base layer frame, updating and referencing last.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame, updating altref.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL1 frame, updating golden.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame. Can still reference all buffer since they have been update this
   // cycle.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
@@ -459,21 +459,21 @@
   // Restart of cycle!
 
   // TL0 base layer frame, updating and referencing last.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Dropped TL2 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, 0, false, 0, nullptr);
 
   // Dropped TL1 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, 0, false, 0, nullptr);
 
   // TL2 frame. This time golden and altref contain data from the previous cycle
   // and cannot be referenced.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
@@ -496,40 +496,40 @@
 
   // Start with a keyframe.
   uint32_t timestamp = 0;
-  Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+  Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Do a full cycle of the pattern.
   for (int i = 0; i < 7; ++i) {
-    tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+    tl_config = tl.NextFrameConfig(0, ++timestamp);
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                     IgnoredCodecSpecificInfo());
   }
 
   // TL0 base layer frame, starting the cycle over.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Encoder has a hiccup and builds a queue, so frame encoding is delayed.
   // TL1 frame, updating golden.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
 
   // TL2 frame, that should be referencing golden, but we can't be certain it's
   // not going to be dropped, so that is not allowed.
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 1);
+  tl_config = tl.NextFrameConfig(0, timestamp + 1);
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
   EXPECT_FALSE(tl_config.golden_buffer_flags & BufferFlags::kReference);
   EXPECT_FALSE(tl_config.arf_buffer_flags & BufferFlags::kReference);
 
   // TL0 base layer frame.
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 2);
+  tl_config = tl.NextFrameConfig(0, timestamp + 2);
 
   // The previous four enqueued frames finally get encoded, and the updated
   // buffers are now OK to reference.
@@ -544,7 +544,7 @@
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame, all buffers are now in a known good state, OK to reference.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp + 1);
+  tl_config = tl.NextFrameConfig(0, ++timestamp + 1);
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
   EXPECT_TRUE(tl_config.golden_buffer_flags & BufferFlags::kReference);
   EXPECT_FALSE(tl_config.arf_buffer_flags & BufferFlags::kReference);
@@ -566,37 +566,37 @@
 
   // Start with a keyframe.
   uint32_t timestamp = 0;
-  Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+  Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Do a full cycle of the pattern.
   for (int i = 0; i < 3; ++i) {
-    tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+    tl_config = tl.NextFrameConfig(0, ++timestamp);
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                     IgnoredCodecSpecificInfo());
   }
 
   // TL0 base layer frame, starting the cycle over.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // TL2 frame.
-  tl_config = tl.UpdateLayerConfig(0, ++timestamp);
+  tl_config = tl.NextFrameConfig(0, ++timestamp);
   tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
                   IgnoredCodecSpecificInfo());
 
   // Encoder has a hiccup and builds a queue, so frame encoding is delayed.
   // Encoded, but delayed frames in TL 1, 2.
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 1);
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 2);
+  tl_config = tl.NextFrameConfig(0, timestamp + 1);
+  tl_config = tl.NextFrameConfig(0, timestamp + 2);
 
   // Restart of the pattern!
 
   // Encoded, but delayed frames in TL 2, 1.
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 3);
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 4);
+  tl_config = tl.NextFrameConfig(0, timestamp + 3);
+  tl_config = tl.NextFrameConfig(0, timestamp + 4);
 
   // TL1 frame from last cycle is ready.
   tl.OnEncodeDone(0, timestamp + 1, kDefaultBytesPerFrame, false, kDefaultQp,
@@ -608,7 +608,7 @@
   // TL2 frame, that should be referencing all buffers, but altref and golden
   // haven not been updated this cycle. (Don't be fooled by the late frames from
   // the last cycle!)
-  tl_config = tl.UpdateLayerConfig(0, timestamp + 5);
+  tl_config = tl.NextFrameConfig(0, timestamp + 5);
   EXPECT_TRUE(tl_config.last_buffer_flags & BufferFlags::kReference);
   EXPECT_FALSE(tl_config.golden_buffer_flags & BufferFlags::kReference);
   EXPECT_FALSE(tl_config.arf_buffer_flags & BufferFlags::kReference);
@@ -646,7 +646,7 @@
     for (int j = 1; j <= i; ++j) {
       // Since last frame was always a keyframe and thus index 0 in the pattern,
       // this loop starts at index 1.
-      Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+      Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
       EXPECT_EQ(expected_flags[j], LibvpxVp8Encoder::EncodeFlags(tl_config))
           << j;
       tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, false, kDefaultQp,
@@ -659,7 +659,7 @@
     }
 
     CodecSpecificInfo info;
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp);
     tl.OnEncodeDone(0, timestamp, kDefaultBytesPerFrame, true, kDefaultQp,
                     &info);
     EXPECT_TRUE(info.codecSpecific.VP8.layerSync)
@@ -748,7 +748,7 @@
   // updates |last|.
   std::vector<Vp8FrameConfig> tl_configs(kMaxPatternLength);
   for (int i = 0; i < kMaxPatternLength; ++i) {
-    Vp8FrameConfig tl_config = tl.UpdateLayerConfig(0, timestamp_);
+    Vp8FrameConfig tl_config = tl.NextFrameConfig(0, timestamp_);
     tl.OnEncodeDone(0, timestamp_, kDefaultBytesPerFrame, i == 0, kDefaultQp,
                     IgnoredCodecSpecificInfo());
     ++timestamp_;
diff --git a/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc b/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
index 3e43275..44c2026 100644
--- a/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
+++ b/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
@@ -923,7 +923,7 @@
   Vp8FrameConfig tl_configs[kMaxSimulcastStreams];
   for (size_t i = 0; i < encoders_.size(); ++i) {
     tl_configs[i] =
-        frame_buffer_controller_->UpdateLayerConfig(i, frame.timestamp());
+        frame_buffer_controller_->NextFrameConfig(i, frame.timestamp());
     if (tl_configs[i].drop_frame) {
       if (send_key_frame) {
         continue;
diff --git a/modules/video_coding/codecs/vp8/screenshare_layers.cc b/modules/video_coding/codecs/vp8/screenshare_layers.cc
index 85fb6d7..352300b 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers.cc
+++ b/modules/video_coding/codecs/vp8/screenshare_layers.cc
@@ -82,8 +82,8 @@
   return false;
 }
 
-Vp8FrameConfig ScreenshareLayers::UpdateLayerConfig(size_t stream_index,
-                                                    uint32_t timestamp) {
+Vp8FrameConfig ScreenshareLayers::NextFrameConfig(size_t stream_index,
+                                                  uint32_t timestamp) {
   RTC_DCHECK_LT(stream_index, StreamCount());
 
   auto it = pending_frame_configs_.find(timestamp);
diff --git a/modules/video_coding/codecs/vp8/screenshare_layers.h b/modules/video_coding/codecs/vp8/screenshare_layers.h
index c7bc5f4..06d4553 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers.h
+++ b/modules/video_coding/codecs/vp8/screenshare_layers.h
@@ -42,8 +42,8 @@
 
   // Returns the recommended VP8 encode flags needed. May refresh the decoder
   // and/or update the reference buffers.
-  Vp8FrameConfig UpdateLayerConfig(size_t stream_index,
-                                   uint32_t rtp_timestamp) override;
+  Vp8FrameConfig NextFrameConfig(size_t stream_index,
+                                 uint32_t rtp_timestamp) override;
 
   // New target bitrate, per temporal layer.
   void OnRatesUpdated(size_t stream_index,
diff --git a/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc b/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
index b5ff190..032c528 100644
--- a/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
+++ b/modules/video_coding/codecs/vp8/screenshare_layers_unittest.cc
@@ -85,7 +85,7 @@
   }
 
   int ConfigureFrame(bool key_frame) {
-    tl_config_ = UpdateLayerConfig(0, timestamp_);
+    tl_config_ = NextFrameConfig(0, timestamp_);
     EXPECT_EQ(0, tl_config_.encoder_layer_id)
         << "ScreenshareLayers always encodes using the bitrate allocator for "
            "layer 0, but may reference different buffers and packetize "
@@ -99,10 +99,10 @@
     return flags;
   }
 
-  Vp8FrameConfig UpdateLayerConfig(size_t stream_index, uint32_t timestamp) {
+  Vp8FrameConfig NextFrameConfig(size_t stream_index, uint32_t timestamp) {
     int64_t timestamp_ms = timestamp / 90;
     clock_.AdvanceTime(TimeDelta::ms(timestamp_ms - rtc::TimeMillis()));
-    return layers_->UpdateLayerConfig(stream_index, timestamp);
+    return layers_->NextFrameConfig(stream_index, timestamp);
   }
 
   int FrameSizeForBitrate(int bitrate_kbps) {
@@ -245,7 +245,7 @@
   for (int i = 0; i < kNumFrames; ++i) {
     CodecSpecificInfo info;
 
-    tl_config_ = UpdateLayerConfig(0, timestamp_);
+    tl_config_ = NextFrameConfig(0, timestamp_);
     config_updated_ = layers_->UpdateConfiguration(0, &cfg_);
 
     // Simulate TL1 being at least 8 qp steps better.
@@ -486,8 +486,8 @@
   layers_->OnRatesUpdated(0, layer_rates, kFrameRate);
   layers_->UpdateConfiguration(0, &cfg_);
 
-  EXPECT_EQ(kTl0Flags, LibvpxVp8Encoder::EncodeFlags(
-                           UpdateLayerConfig(0, kStartTimestamp)));
+  EXPECT_EQ(kTl0Flags,
+            LibvpxVp8Encoder::EncodeFlags(NextFrameConfig(0, kStartTimestamp)));
   layers_->OnEncodeDone(0, kStartTimestamp, kLargeFrameSizeBytes, false,
                         kDefaultQp, IgnoredCodecSpecificInfo());
 
@@ -502,12 +502,12 @@
   // any later, the frame will be dropped anyway by the frame rate throttling
   // logic.
   EXPECT_TRUE(
-      UpdateLayerConfig(0, kTwoSecondsLater - kTimestampDelta5Fps).drop_frame);
+      NextFrameConfig(0, kTwoSecondsLater - kTimestampDelta5Fps).drop_frame);
 
   // More than two seconds has passed since last frame, one should be emitted
   // even if bitrate target is then exceeded.
   EXPECT_EQ(kTl0Flags, LibvpxVp8Encoder::EncodeFlags(
-                           UpdateLayerConfig(0, kTwoSecondsLater + 90)));
+                           NextFrameConfig(0, kTwoSecondsLater + 90)));
 }
 
 TEST_F(ScreenshareLayerTest, UpdatesHistograms) {
@@ -520,7 +520,7 @@
   for (int64_t timestamp = 0;
        timestamp < kTimestampDelta5Fps * 5 * metrics::kMinRunTimeInSeconds;
        timestamp += kTimestampDelta5Fps) {
-    tl_config_ = UpdateLayerConfig(0, timestamp);
+    tl_config_ = NextFrameConfig(0, timestamp);
     if (tl_config_.drop_frame) {
       dropped_frame = true;
       continue;
@@ -609,7 +609,7 @@
 
   // Send at regular rate - no drops expected.
   for (int64_t i = 0; i < kTestSpanMs; i += kFrameIntervalsMs) {
-    if (UpdateLayerConfig(0, timestamp).drop_frame) {
+    if (NextFrameConfig(0, timestamp).drop_frame) {
       ++num_discarded_frames;
     } else {
       size_t frame_size_bytes = kDefaultTl0BitrateKbps * kFrameIntervalsMs / 8;
@@ -627,7 +627,7 @@
   num_input_frames = 0;
   num_discarded_frames = 0;
   for (int64_t i = 0; i < kTestSpanMs; i += kFrameIntervalsMs / 2) {
-    if (UpdateLayerConfig(0, timestamp).drop_frame) {
+    if (NextFrameConfig(0, timestamp).drop_frame) {
       ++num_discarded_frames;
     } else {
       size_t frame_size_bytes = kDefaultTl0BitrateKbps * kFrameIntervalsMs / 8;
@@ -669,7 +669,7 @@
 
   // Add a large gap, so there's plenty of room in the rate tracker.
   timestamp_ += kTimestampDelta5Fps * 3;
-  EXPECT_FALSE(UpdateLayerConfig(0, timestamp_).drop_frame);
+  EXPECT_FALSE(NextFrameConfig(0, timestamp_).drop_frame);
   layers_->OnEncodeDone(0, timestamp_, frame_size_, false, kDefaultQp,
                         IgnoredCodecSpecificInfo());
 
@@ -677,11 +677,11 @@
   // frame just before this limit.
   const int64_t kMinFrameInterval = (kTimestampDelta5Fps * 85) / 100;
   timestamp_ += kMinFrameInterval - 90;
-  EXPECT_TRUE(UpdateLayerConfig(0, timestamp_).drop_frame);
+  EXPECT_TRUE(NextFrameConfig(0, timestamp_).drop_frame);
 
   // Try again at the limit, now it should pass.
   timestamp_ += 90;
-  EXPECT_FALSE(UpdateLayerConfig(0, timestamp_).drop_frame);
+  EXPECT_FALSE(NextFrameConfig(0, timestamp_).drop_frame);
 }
 
 TEST_F(ScreenshareLayerTest, AdjustsBitrateWhenDroppingFrames) {
diff --git a/modules/video_coding/utility/simulcast_rate_allocator_unittest.cc b/modules/video_coding/utility/simulcast_rate_allocator_unittest.cc
index 6a6604b..eefb743 100644
--- a/modules/video_coding/utility/simulcast_rate_allocator_unittest.cc
+++ b/modules/video_coding/utility/simulcast_rate_allocator_unittest.cc
@@ -37,7 +37,7 @@
 
 class MockTemporalLayers : public Vp8FrameBufferController {
  public:
-  MOCK_METHOD2(UpdateLayerConfig, Vp8FrameConfig(size_t, uint32_t));
+  MOCK_METHOD2(NextFrameConfig, Vp8FrameConfig(size_t, uint32_t));
   MOCK_METHOD3(OnRatesUpdated, void(size_t, const std::vector<uint32_t>&, int));
   MOCK_METHOD2(UpdateConfiguration, bool(size_t, Vp8EncoderConfig*));
   MOCK_METHOD6(OnEncodeDone,
diff --git a/test/fake_vp8_encoder.cc b/test/fake_vp8_encoder.cc
index b714b4d..dd60a48 100644
--- a/test/fake_vp8_encoder.cc
+++ b/test/fake_vp8_encoder.cc
@@ -93,8 +93,8 @@
     CodecSpecificInfo* codec_specific) {
   RTC_DCHECK_RUN_ON(&sequence_checker_);
   uint8_t stream_idx = encoded_image->SpatialIndex().value_or(0);
-  frame_buffer_controller_->UpdateLayerConfig(stream_idx,
-                                              encoded_image->Timestamp());
+  frame_buffer_controller_->NextFrameConfig(stream_idx,
+                                            encoded_image->Timestamp());
   PopulateCodecSpecific(codec_specific, encoded_image->size(),
                         encoded_image->_frameType, stream_idx,
                         encoded_image->Timestamp());