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media / mojo / mojom / webrtc_video_perf.mojom [blame]

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module media.mojom;

import "media/mojo/mojom/media_types.mojom";

// WebRTC prediction features that represent a video configuration.
struct WebrtcPredictionFeatures {
  bool is_decode_stats = true;
  // Not possible to have a default initialization for native enums.
  VideoCodecProfile profile;
  int32 video_pixels = 0;
  bool hardware_accelerated = false;
};

// WebRTC video stats that are collected and stored for for MediaCapabilities
// smoothness predictions.
struct WebrtcVideoStats {
  uint32 frames_processed = 0;
  uint32 key_frames_processed = 0;
  // The 99 percentile of the processing time.
  float p99_processing_time_ms = 0;
};

// This interface allows forwarding WebRTC encode and decode statistics to the
// browser process where they are stored in a local database.
interface WebrtcVideoPerfRecorder {
  // Update stats values for the specified features. Each update overrides the
  // previous values.
  UpdateRecord(
    WebrtcPredictionFeatures features, WebrtcVideoStats video_stats);
};

// This interface allows retrieving a smoothness prediction based on historical
// performance for the specified video configuration.
interface WebrtcVideoPerfHistory {
  // Get a performance prediction `is_smooth` based on the specified `features`
  // and `frames_per_second`.
  GetPerfInfo(WebrtcPredictionFeatures features, int32 frames_per_second)
    => (bool is_smooth);
};