Query WebRTC-KeyframeInterval through propagated field trials

Bug: webrtc:42220378
Change-Id: I3556ec6b280bf6c03e6c3a20949a19e182eed2b8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/349640
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42349}

rtc_base/experiments/BUILD.gn

@@ -152,7 +152,6 @@ rtc_library("keyframe_interval_settings_experiment") {
   deps = [
     ":field_trial_parser",
     "../../api:field_trials_view",
-    "../../api/transport:field_trial_based_config",
   ]
   absl_deps = [ "//third_party/abseil-cpp/absl/types:optional" ]
 }

rtc_base/experiments/keyframe_interval_settings.cc

@@ -10,7 +10,7 @@
 
 #include "rtc_base/experiments/keyframe_interval_settings.h"
 
-#include "api/transport/field_trial_based_config.h"
+#include "api/field_trials_view.h"
 
 namespace webrtc {
 
@@ -21,15 +21,10 @@ constexpr char kFieldTrialName[] = "WebRTC-KeyframeInterval";
 }  // namespace
 
 KeyframeIntervalSettings::KeyframeIntervalSettings(
-    const FieldTrialsView* const key_value_config)
+    const FieldTrialsView& key_value_config)
     : min_keyframe_send_interval_ms_("min_keyframe_send_interval_ms") {
   ParseFieldTrial({&min_keyframe_send_interval_ms_},
-                  key_value_config->Lookup(kFieldTrialName));
-}
-
-KeyframeIntervalSettings KeyframeIntervalSettings::ParseFromFieldTrials() {
-  FieldTrialBasedConfig field_trial_config;
-  return KeyframeIntervalSettings(&field_trial_config);
+                  key_value_config.Lookup(kFieldTrialName));
 }
 
 absl::optional<int> KeyframeIntervalSettings::MinKeyframeSendIntervalMs()

rtc_base/experiments/keyframe_interval_settings.h

@@ -17,20 +17,18 @@
 
 namespace webrtc {
 
-// TODO(bugs.webrtc.org/10427): Remove and replace with proper configuration
+// TODO: bugs.webrtc.org/42220470 - Remove and replace with proper configuration
 // parameter, or move to using FIR if intent is to avoid triggering multiple
 // times to PLIs corresponding to the same request when RTT is large.
 class KeyframeIntervalSettings final {
  public:
-  static KeyframeIntervalSettings ParseFromFieldTrials();
+  explicit KeyframeIntervalSettings(const FieldTrialsView& key_value_config);
 
   // Sender side.
   // The encoded keyframe send rate is <= 1/MinKeyframeSendIntervalMs().
   absl::optional<int> MinKeyframeSendIntervalMs() const;
 
  private:
-  explicit KeyframeIntervalSettings(const FieldTrialsView* key_value_config);
-
   FieldTrialOptional<int> min_keyframe_send_interval_ms_;
 };
 

rtc_base/experiments/keyframe_interval_settings_unittest.cc

@@ -10,33 +10,29 @@
 
 #include "rtc_base/experiments/keyframe_interval_settings.h"
 
-#include "test/field_trial.h"
+#include "test/explicit_key_value_config.h"
 #include "test/gtest.h"
 
 namespace webrtc {
 namespace {
 
+using test::ExplicitKeyValueConfig;
+
 TEST(KeyframeIntervalSettingsTest, ParsesMinKeyframeSendIntervalMs) {
-  EXPECT_FALSE(KeyframeIntervalSettings::ParseFromFieldTrials()
+  EXPECT_FALSE(KeyframeIntervalSettings(ExplicitKeyValueConfig(""))
                    .MinKeyframeSendIntervalMs());
 
-  test::ScopedFieldTrials field_trials(
+  ExplicitKeyValueConfig field_trials(
       "WebRTC-KeyframeInterval/min_keyframe_send_interval_ms:100/");
-  EXPECT_EQ(KeyframeIntervalSettings::ParseFromFieldTrials()
-                .MinKeyframeSendIntervalMs(),
+  EXPECT_EQ(KeyframeIntervalSettings(field_trials).MinKeyframeSendIntervalMs(),
             100);
 }
 
 TEST(KeyframeIntervalSettingsTest, DoesNotParseIncorrectValues) {
-  EXPECT_FALSE(KeyframeIntervalSettings::ParseFromFieldTrials()
-                   .MinKeyframeSendIntervalMs());
-
-  test::ScopedFieldTrials field_trials(
+  ExplicitKeyValueConfig field_trials(
       "WebRTC-KeyframeInterval/min_keyframe_send_interval_ms:a/");
-  EXPECT_FALSE(KeyframeIntervalSettings::ParseFromFieldTrials()
-                   .MinKeyframeSendIntervalMs());
-  EXPECT_FALSE(KeyframeIntervalSettings::ParseFromFieldTrials()
-                   .MinKeyframeSendIntervalMs());
+  EXPECT_FALSE(
+      KeyframeIntervalSettings(field_trials).MinKeyframeSendIntervalMs());
 }
 
 }  // namespace

video/encoder_rtcp_feedback.cc

@@ -14,9 +14,11 @@
 #include <utility>
 
 #include "absl/types/optional.h"
+#include "api/environment/environment.h"
 #include "api/video_codecs/video_encoder.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/experiments/keyframe_interval_settings.h"
+#include "system_wrappers/include/clock.h"
 
 namespace webrtc {
 
@@ -25,14 +27,14 @@ constexpr int kMinKeyframeSendIntervalMs = 300;
 }  // namespace
 
 EncoderRtcpFeedback::EncoderRtcpFeedback(
-    Clock* clock,
+    const Environment& env,
     bool per_layer_keyframes,
     const std::vector<uint32_t>& ssrcs,
     VideoStreamEncoderInterface* encoder,
     std::function<std::vector<RtpSequenceNumberMap::Info>(
         uint32_t ssrc,
         const std::vector<uint16_t>& seq_nums)> get_packet_infos)
-    : clock_(clock),
+    : env_(env),
       ssrcs_(ssrcs),
       per_layer_keyframes_(per_layer_keyframes),
       get_packet_infos_(std::move(get_packet_infos)),
@@ -40,7 +42,7 @@ EncoderRtcpFeedback::EncoderRtcpFeedback(
       time_last_packet_delivery_queue_(per_layer_keyframes ? ssrcs.size() : 1,
                                        Timestamp::Zero()),
       min_keyframe_send_interval_(
-          TimeDelta::Millis(KeyframeIntervalSettings::ParseFromFieldTrials()
+          TimeDelta::Millis(KeyframeIntervalSettings(env_.field_trials())
                                 .MinKeyframeSendIntervalMs()
                                 .value_or(kMinKeyframeSendIntervalMs))) {
   RTC_DCHECK(!ssrcs.empty());
@@ -60,7 +62,7 @@ void EncoderRtcpFeedback::OnReceivedIntraFrameRequest(uint32_t ssrc) {
   size_t ssrc_index =
       per_layer_keyframes_ ? std::distance(ssrcs_.begin(), it) : 0;
   RTC_CHECK_LE(ssrc_index, time_last_packet_delivery_queue_.size());
-  const Timestamp now = clock_->CurrentTime();
+  const Timestamp now = env_.clock().CurrentTime();
   if (time_last_packet_delivery_queue_[ssrc_index] +
           min_keyframe_send_interval_ >
       now)

video/encoder_rtcp_feedback.h

@@ -13,13 +13,13 @@
 #include <functional>
 #include <vector>
 
+#include "api/environment/environment.h"
 #include "api/sequence_checker.h"
 #include "api/units/time_delta.h"
 #include "api/units/timestamp.h"
 #include "call/rtp_video_sender_interface.h"
 #include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "rtc_base/system/no_unique_address.h"
-#include "system_wrappers/include/clock.h"
 #include "video/video_stream_encoder_interface.h"
 
 namespace webrtc {
@@ -32,7 +32,7 @@ class EncoderRtcpFeedback : public RtcpIntraFrameObserver,
                             public RtcpLossNotificationObserver {
  public:
   EncoderRtcpFeedback(
-      Clock* clock,
+      const Environment& env,
       bool per_layer_keyframes,
       const std::vector<uint32_t>& ssrcs,
       VideoStreamEncoderInterface* encoder,
@@ -50,7 +50,7 @@ class EncoderRtcpFeedback : public RtcpIntraFrameObserver,
                                   bool decodability_flag) override;
 
  private:
-  Clock* const clock_;
+  const Environment env_;
   const std::vector<uint32_t> ssrcs_;
   const bool per_layer_keyframes_;
   const std::function<std::vector<RtpSequenceNumberMap::Info>(

video/encoder_rtcp_feedback_unittest.cc

@@ -12,6 +12,7 @@
 
 #include <memory>
 
+#include "api/environment/environment_factory.h"
 #include "test/gmock.h"
 #include "test/gtest.h"
 #include "video/test/mock_video_stream_encoder.h"
@@ -27,7 +28,7 @@ class VideoEncoderFeedbackKeyframeTestBase : public ::testing::Test {
                                        std::vector<uint32_t> ssrcs)
       : simulated_clock_(123456789),
         encoder_(),
-        encoder_rtcp_feedback_(&simulated_clock_,
+        encoder_rtcp_feedback_(CreateEnvironment(&simulated_clock_),
                                per_layer_pli_handling,
                                ssrcs,
                                &encoder_,

video/video_send_stream_impl.cc

@@ -418,7 +418,7 @@ VideoSendStreamImpl::VideoSendStreamImpl(
                     metronome,
                     config_.encoder_selector)),
       encoder_feedback_(
-          &env_.clock(),
+          env_,
           SupportsPerLayerPictureLossIndication(
               encoder_config.video_format.parameters),
           config_.rtp.ssrcs,