Allow injecting a Vp8FrameBufferControllerFactory

Injection is made possible through VP8Encoder::Create.
According to native-api.md, it is a defacto public API despite
not being in the api/ folder.

Bug: webrtc:10259, webrtc:10382
Change-Id: Ifc5d55aa99613cfee0fcb4f0c6690121c85b2e3e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128883
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27281}

modules/video_coding/codecs/vp8/include/vp8.h

@@ -15,6 +15,7 @@
 
 #include <memory>
 
+#include "api/video_codecs/vp8_frame_buffer_controller.h"
 #include "modules/video_coding/include/video_codec_interface.h"
 
 namespace webrtc {
@@ -22,6 +23,10 @@ namespace webrtc {
 class VP8Encoder {
  public:
   static std::unique_ptr<VideoEncoder> Create();
+
+  static std::unique_ptr<VideoEncoder> Create(
+      std::unique_ptr<Vp8FrameBufferControllerFactory>
+          frame_buffer_controller_factory);
 };  // end of VP8Encoder class
 
 class VP8Decoder {

modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc

@@ -136,7 +136,14 @@ bool UpdateVpxConfiguration(size_t stream_index,
 }  // namespace
 
 std::unique_ptr<VideoEncoder> VP8Encoder::Create() {
-  return absl::make_unique<LibvpxVp8Encoder>();
+  return VP8Encoder::Create(nullptr);
+}
+
+std::unique_ptr<VideoEncoder> VP8Encoder::Create(
+    std::unique_ptr<Vp8FrameBufferControllerFactory>
+        frame_buffer_controller_factory) {
+  return absl::make_unique<LibvpxVp8Encoder>(
+      std::move(frame_buffer_controller_factory));
 }
 
 vpx_enc_frame_flags_t LibvpxVp8Encoder::EncodeFlags(
@@ -169,9 +176,21 @@ vpx_enc_frame_flags_t LibvpxVp8Encoder::EncodeFlags(
 }
 
 LibvpxVp8Encoder::LibvpxVp8Encoder()
-    : LibvpxVp8Encoder(LibvpxInterface::CreateEncoder()) {}
+    : LibvpxVp8Encoder(nullptr, LibvpxInterface::CreateEncoder()) {}
+
+LibvpxVp8Encoder::LibvpxVp8Encoder(
+    std::unique_ptr<Vp8FrameBufferControllerFactory>
+        frame_buffer_controller_factory)
+    : LibvpxVp8Encoder(std::move(frame_buffer_controller_factory),
+                       LibvpxInterface::CreateEncoder()) {}
 
 LibvpxVp8Encoder::LibvpxVp8Encoder(std::unique_ptr<LibvpxInterface> interface)
+    : LibvpxVp8Encoder(nullptr, std::move(interface)) {}
+
+LibvpxVp8Encoder::LibvpxVp8Encoder(
+    std::unique_ptr<Vp8FrameBufferControllerFactory>
+        frame_buffer_controller_factory,
+    std::unique_ptr<LibvpxInterface> interface)
     : libvpx_(std::move(interface)),
       experimental_cpu_speed_config_arm_(CpuSpeedExperiment::GetConfigs()),
       rate_control_settings_(RateControlSettings::ParseFromFieldTrials()),
@@ -182,6 +201,8 @@ LibvpxVp8Encoder::LibvpxVp8Encoder(std::unique_ptr<LibvpxInterface> interface)
       cpu_speed_default_(-6),
       number_of_cores_(0),
       rc_max_intra_target_(0),
+      frame_buffer_controller_factory_(
+          std::move(frame_buffer_controller_factory)),
       key_frame_request_(kMaxSimulcastStreams, false),
       variable_framerate_experiment_(ParseVariableFramerateConfig(
           "WebRTC-VP8VariableFramerateScreenshare")),
@@ -351,9 +372,12 @@ int LibvpxVp8Encoder::InitEncode(const VideoCodec* inst,
   }
 
   RTC_DCHECK(!frame_buffer_controller_);
-  // TODO(bugs.webrtc.org/10382): Inject the factory.
-  Vp8TemporalLayersFactory factory;
-  frame_buffer_controller_ = factory.Create(*inst);
+  if (frame_buffer_controller_factory_) {
+    frame_buffer_controller_ = frame_buffer_controller_factory_->Create(*inst);
+  } else {
+    Vp8TemporalLayersFactory factory;
+    frame_buffer_controller_ = factory.Create(*inst);
+  }
 
   number_of_cores_ = number_of_cores;
   timestamp_ = 0;

modules/video_coding/codecs/vp8/libvpx_vp8_encoder.h

@@ -36,7 +36,12 @@ namespace webrtc {
 class LibvpxVp8Encoder : public VideoEncoder {
  public:
   LibvpxVp8Encoder();
+  explicit LibvpxVp8Encoder(std::unique_ptr<Vp8FrameBufferControllerFactory>
+                                frame_buffer_controller_factory);
   explicit LibvpxVp8Encoder(std::unique_ptr<LibvpxInterface> interface);
+  LibvpxVp8Encoder(std::unique_ptr<Vp8FrameBufferControllerFactory>
+                       frame_buffer_controller_factory,
+                   std::unique_ptr<LibvpxInterface> interface);
   ~LibvpxVp8Encoder() override;
 
   int Release() override;
@@ -102,6 +107,8 @@ class LibvpxVp8Encoder : public VideoEncoder {
   int cpu_speed_default_;
   int number_of_cores_;
   uint32_t rc_max_intra_target_;
+  const std::unique_ptr<Vp8FrameBufferControllerFactory>
+      frame_buffer_controller_factory_;
   std::unique_ptr<Vp8FrameBufferController> frame_buffer_controller_;
   std::vector<bool> key_frame_request_;
   std::vector<bool> send_stream_;