chromium/media/mojo/services/webrtc_video_perf_history.h

// 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.

#ifndef MEDIA_MOJO_SERVICES_WEBRTC_VIDEO_PERF_HISTORY_H_
#define MEDIA_MOJO_SERVICES_WEBRTC_VIDEO_PERF_HISTORY_H_

#include <stdint.h>
#include <memory>
#include <queue>

#include "base/functional/callback.h"
#include "base/metrics/field_trial_params.h"
#include "base/sequence_checker.h"
#include "base/supports_user_data.h"
#include "media/base/video_codecs.h"
#include "media/capabilities/webrtc_video_stats_db.h"
#include "media/capabilities/webrtc_video_stats_db_provider.h"
#include "media/mojo/mojom/webrtc_video_perf.mojom.h"
#include "media/mojo/services/media_mojo_export.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver_set.h"

namespace media {

// This class saves and retrieves WebRTC video performance statistics on behalf
// of the MediaCapabilities API.
//
// The database is lazily initialized/loaded upon the first API call requiring
// DB access. DB implementations must take care to perform work on a separate
// task runner.
//
// Retrieving stats is triggered by calls to the GetPerfInfo() Mojo interface.
// The raw values are reduced to a boolean (is_smooth) which is sent along the
// Mojo callback.
//
// Saving stats is performed by SavePerfRecord(), where a record is defined as a
// continuous playback/encoding of a stream with fixed characteristics (codec
// profile, number of pixels, hardware accelerated).
//
// THREAD SAFETY:
// This class is not thread safe. All API calls should be made on the same
// sequence.
class MEDIA_MOJO_EXPORT WebrtcVideoPerfHistory
    : public media::mojom::WebrtcVideoPerfHistory,
      public WebrtcVideoStatsDBProvider,
      public base::SupportsUserData::Data { … };

}  // namespace media

#endif  // MEDIA_MOJO_SERVICES_WEBRTC_VIDEO_PERF_HISTORY_H_