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Added UMA telemetry for Format Queries (#2954)
Modifies the existing class `media::FormatSupportQueryMetrics` to report latency stats to UMA histograms, and does so on Gold builds. The existing log reporting has been retained for non-Gold builds. Added basic unit tests to verify that the UMA histograms are being reported correctly. b/329439820 Change-Id: Ie7f4e2e6c518d1c6c058fcbf62f046b56ea5f298
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,76 @@ | ||
| // Copyright 2024 The Cobalt Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #include "cobalt/media/base/format_support_query_metrics.h" | ||
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| #include <memory> | ||
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| #include "base/test/metrics/histogram_tester.h" | ||
| #include "base/test/simple_test_tick_clock.h" | ||
| #include "base/time/tick_clock.h" | ||
| #include "base/time/time.h" | ||
| #include "starboard/media.h" | ||
| #include "testing/gtest/include/gtest/gtest.h" | ||
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| namespace cobalt { | ||
| namespace media { | ||
| namespace { | ||
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| constexpr char kUmaPrefix[] = "Cobalt.Media."; | ||
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| class FormatSupportQueryMetricsTest : public ::testing::Test { | ||
| protected: | ||
| FormatSupportQueryMetricsTest() : metrics_(&clock_) {} | ||
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| void SetUp() override { clock_.SetNowTicks(base::TimeTicks()); } | ||
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| base::HistogramTester histogram_tester_; | ||
| base::SimpleTestTickClock clock_; | ||
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| FormatSupportQueryMetrics metrics_; | ||
| }; | ||
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| TEST_F(FormatSupportQueryMetricsTest, | ||
| ReportsMediaSourceIsTypeSupportedLatencyToUMA) { | ||
| clock_.Advance(base::TimeDelta::FromMicroseconds(50)); | ||
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| metrics_.RecordAndLogQuery( | ||
| FormatSupportQueryAction::MEDIA_SOURCE_IS_TYPE_SUPPORTED, "", "", | ||
| kSbMediaSupportTypeNotSupported); | ||
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| auto counts = histogram_tester_.GetTotalCountsForPrefix(kUmaPrefix); | ||
| EXPECT_EQ(1, counts.size()); | ||
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| histogram_tester_.ExpectUniqueSample( | ||
| std::string(kUmaPrefix) + "MediaSource.IsTypeSupported.Timing", 50, 1); | ||
| } | ||
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| TEST_F(FormatSupportQueryMetricsTest, | ||
| ReportsHTMLMediaElementCanPlayTypeLatencyToUMA) { | ||
| clock_.Advance(base::TimeDelta::FromMicroseconds(50)); | ||
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| metrics_.RecordAndLogQuery( | ||
| FormatSupportQueryAction::HTML_MEDIA_ELEMENT_CAN_PLAY_TYPE, "", "", | ||
| kSbMediaSupportTypeNotSupported); | ||
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| auto counts = histogram_tester_.GetTotalCountsForPrefix(kUmaPrefix); | ||
| EXPECT_EQ(1, counts.size()); | ||
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| histogram_tester_.ExpectUniqueSample( | ||
| std::string(kUmaPrefix) + "HTMLMediaElement.CanPlayType.Timing", 50, 1); | ||
| } | ||
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| } // namespace | ||
| } // namespace media | ||
| } // namespace cobalt |
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| Original file line number | Diff line number | Diff line change |
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@@ -67,6 +67,28 @@ Always run the pretty print utility on this file after editing: | |
| </summary> | ||
| </histogram> | ||
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| <histogram name="Cobalt.Media.HTMLMediaElement.CanPlayType.Timing" | ||
| units="microseconds" expires_after="never"> | ||
| <!-- expires-never: Needed for long-term tracking of format query latency. --> | ||
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| <owner>[email protected]</owner> | ||
| <owner>[email protected]</owner> | ||
| <summary> | ||
| Timing data for calls to `HTMLMediaElement.canPlayType`. | ||
| </summary> | ||
| </histogram> | ||
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| <histogram name="Cobalt.Media.MediaSource.IsTypeSupported.Timing" | ||
| units="microseconds" expires_after="never"> | ||
| <!-- expires-never: Needed for long-term tracking of format query latency. --> | ||
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| <owner>[email protected]</owner> | ||
| <owner>[email protected]</owner> | ||
| <summary> | ||
| Timing data for calls to `MediaSource.isTypeSupported`. | ||
| </summary> | ||
| </histogram> | ||
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| <histogram name="Cobalt.Media.PipelineStatus.AudioOnly" enum="PipelineStatus" | ||
| expires_after="never"> | ||
| <!-- expires-never: Needed for baseline Media pipeline health metric. --> | ||
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