Revert of Issue 2434073003: Extract bitrate allocation ...

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

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
index 32472750f5f0fc21df8512431ece44af806377d7..880f45fa7e4ca7f0ffa55ccd67251e3e5f986eec 100644
--- a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
@@ -83,6 +83,17 @@
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
+struct ScreenshareTemporalLayersFactory : webrtc::TemporalLayersFactory {
+  ScreenshareTemporalLayersFactory() {}
+  virtual ~ScreenshareTemporalLayersFactory() {}
+
+  virtual webrtc::TemporalLayers* Create(int num_temporal_layers,
+                                         uint8_t initial_tl0_pic_idx) const {
+    return new webrtc::ScreenshareLayers(num_temporal_layers, rand(),
+                                         webrtc::Clock::GetRealTimeClock());
+  }
+};
+
 // An EncodedImageCallback implementation that forwards on calls to a
 // SimulcastEncoderAdapter, but with the stream index it's registered with as
 // the first parameter to Encoded.
@@ -105,25 +116,6 @@
   const size_t stream_idx_;
 };
 
-// Utility class used to adapt the simulcast id as reported by the temporal
-// layers factory, since each sub-encoder will report stream 0.
-class TemporalLayersFactoryAdapter : public webrtc::TemporalLayersFactory {
- public:
-  TemporalLayersFactoryAdapter(int adapted_simulcast_id,
-                               const TemporalLayersFactory& tl_factory)
-      : adapted_simulcast_id_(adapted_simulcast_id), tl_factory_(tl_factory) {}
-  ~TemporalLayersFactoryAdapter() override {}
-  webrtc::TemporalLayers* Create(int simulcast_id,
-                                 int temporal_layers,
-                                 uint8_t initial_tl0_pic_idx) const override {
-    return tl_factory_.Create(adapted_simulcast_id_, temporal_layers,
-                              initial_tl0_pic_idx);
-  }
-
-  const int adapted_simulcast_id_;
-  const TemporalLayersFactory& tl_factory_;
-};
-
 }  // namespace
 
 namespace webrtc {
@@ -133,6 +125,7 @@
       encoded_complete_callback_(nullptr),
       implementation_name_("SimulcastEncoderAdapter") {
   memset(&codec_, 0, sizeof(webrtc::VideoCodec));
+  rate_allocator_.reset(new SimulcastRateAllocator(codec_));
 }
 
 SimulcastEncoderAdapter::~SimulcastEncoderAdapter() {
@@ -180,13 +173,14 @@
   }
 
   codec_ = *inst;
-  SimulcastRateAllocator rate_allocator(codec_, nullptr);
-  BitrateAllocation allocation = rate_allocator.GetAllocation(
-      codec_.startBitrate * 1000, codec_.maxFramerate);
-  std::vector<uint32_t> start_bitrates;
-  for (int i = 0; i < kMaxSimulcastStreams; ++i) {
-    uint32_t stream_bitrate = allocation.GetSpatialLayerSum(i) / 1000;
-    start_bitrates.push_back(stream_bitrate);
+  rate_allocator_.reset(new SimulcastRateAllocator(codec_));
+  std::vector<uint32_t> start_bitrates =
+      rate_allocator_->GetAllocation(codec_.startBitrate);
+
+  // Special mode when screensharing on a single stream.
+  if (number_of_streams == 1 && inst->mode == kScreensharing) {
+    screensharing_tl_factory_.reset(new ScreenshareTemporalLayersFactory());
+    codec_.VP8()->tl_factory = screensharing_tl_factory_.get();
   }
 
   std::string implementation_name;
@@ -206,9 +200,6 @@
       PopulateStreamCodec(&codec_, i, start_bitrate_kbps,
                           highest_resolution_stream, &stream_codec);
     }
-    TemporalLayersFactoryAdapter tl_factory_adapter(i,
-                                                    *codec_.VP8()->tl_factory);
-    stream_codec.VP8()->tl_factory = &tl_factory_adapter;
 
     // TODO(ronghuawu): Remove once this is handled in VP8EncoderImpl.
     if (stream_codec.qpMax < kDefaultMinQp) {
@@ -349,48 +340,61 @@
   return WEBRTC_VIDEO_CODEC_OK;
 }
 
-int SimulcastEncoderAdapter::SetRateAllocation(const BitrateAllocation& bitrate,
-                                               uint32_t new_framerate) {
-  if (!Initialized())
+int SimulcastEncoderAdapter::SetRates(uint32_t new_bitrate_kbit,
+                                      uint32_t new_framerate) {
+  if (!Initialized()) {
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
-
-  if (new_framerate < 1)
-    return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-
-  if (codec_.maxBitrate > 0 && bitrate.get_sum_kbps() > codec_.maxBitrate)
-    return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-
-  if (bitrate.get_sum_bps() > 0) {
+  }
+  if (new_framerate < 1) {
+    return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
+  }
+  if (codec_.maxBitrate > 0 && new_bitrate_kbit > codec_.maxBitrate) {
+    new_bitrate_kbit = codec_.maxBitrate;
+  }
+
+  std::vector<uint32_t> stream_bitrates;
+  if (new_bitrate_kbit > 0) {
     // Make sure the bitrate fits the configured min bitrates. 0 is a special
     // value that means paused, though, so leave it alone.
-    if (bitrate.get_sum_kbps() < codec_.minBitrate)
-      return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-
+    if (new_bitrate_kbit < codec_.minBitrate) {
+      new_bitrate_kbit = codec_.minBitrate;
+    }
     if (codec_.numberOfSimulcastStreams > 0 &&
-        bitrate.get_sum_kbps() < codec_.simulcastStream[0].minBitrate) {
-      return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
-    }
-  }
-
+        new_bitrate_kbit < codec_.simulcastStream[0].minBitrate) {
+      new_bitrate_kbit = codec_.simulcastStream[0].minBitrate;
+    }
+    stream_bitrates = rate_allocator_->GetAllocation(new_bitrate_kbit);
+  }
   codec_.maxFramerate = new_framerate;
 
+  // Disable any stream not in the current allocation.
+  stream_bitrates.resize(streaminfos_.size(), 0U);
+
   for (size_t stream_idx = 0; stream_idx < streaminfos_.size(); ++stream_idx) {
-    uint32_t stream_bitrate_kbps =
-        bitrate.GetSpatialLayerSum(stream_idx) / 1000;
-
+    uint32_t stream_bitrate_kbps = stream_bitrates[stream_idx];
     // Need a key frame if we have not sent this stream before.
     if (stream_bitrate_kbps > 0 && !streaminfos_[stream_idx].send_stream) {
       streaminfos_[stream_idx].key_frame_request = true;
     }
     streaminfos_[stream_idx].send_stream = stream_bitrate_kbps > 0;
 
-    // Slice the temporal layers out of the full allocation and pass it on to
-    // the encoder handling the current simulcast stream.
-    BitrateAllocation stream_allocation;
-    for (int i = 0; i < kMaxTemporalStreams; ++i)
-      stream_allocation.SetBitrate(0, i, bitrate.GetBitrate(stream_idx, i));
-    streaminfos_[stream_idx].encoder->SetRateAllocation(stream_allocation,
-                                                        new_framerate);
+    // TODO(holmer): This is a temporary hack for screensharing, where we
+    // interpret the startBitrate as the encoder target bitrate. This is
+    // to allow for a different max bitrate, so if the codec can't meet
+    // the target we still allow it to overshoot up to the max before dropping
+    // frames. This hack should be improved.
+    if (codec_.targetBitrate > 0 &&
+        (codec_.VP8()->numberOfTemporalLayers == 2 ||
+         codec_.simulcastStream[0].numberOfTemporalLayers == 2)) {
+      stream_bitrate_kbps = std::min(codec_.maxBitrate, stream_bitrate_kbps);
+      // TODO(ronghuawu): Can't change max bitrate via the VideoEncoder
+      // interface. And VP8EncoderImpl doesn't take negative framerate.
+      // max_bitrate = std::min(codec_.maxBitrate, stream_bitrate_kbps);
+      // new_framerate = -1;
+    }
+
+    streaminfos_[stream_idx].encoder->SetRates(stream_bitrate_kbps,
+                                               new_framerate);
   }
 
   return WEBRTC_VIDEO_CODEC_OK;