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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_
#define CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_
#include <list>
#include <map>
#include <string>
#include <tuple>
#include <vector>
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/strings/string16.h"
#include "base/synchronization/lock.h"
#include "base/values.h"
#include "content/common/content_export.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "media/audio/audio_logging.h"
#include "media/base/media_log.h"
#include "media/capture/video/video_capture_device_descriptor.h"
#include "media/capture/video_capture_types.h"
namespace media {
struct MediaLogEvent;
}
namespace ukm {
class UkmEntryBuilder;
}
namespace content {
// This class stores information about currently active media.
class CONTENT_EXPORT MediaInternals
: NON_EXPORTED_BASE(public media::AudioLogFactory),
public NotificationObserver {
public:
// Called with the update string.
typedef base::Callback<void(const base::string16&)> UpdateCallback;
static MediaInternals* GetInstance();
~MediaInternals() override;
// NotificationObserver implementation.
void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) override;
// Called when a MediaEvent occurs.
void OnMediaEvents(int render_process_id,
const std::vector<media::MediaLogEvent>& events);
// Add/remove update callbacks (see above). Must be called on the UI thread.
// The callbacks must also be fired on UI thread.
void AddUpdateCallback(const UpdateCallback& callback);
void RemoveUpdateCallback(const UpdateCallback& callback);
// Whether there are any update callbacks available. Can be called on any
// thread.
bool CanUpdate();
// Replay all saved media events.
void SendHistoricalMediaEvents();
// Sends all audio cached data to each registered UpdateCallback.
void SendAudioStreamData();
// Sends all video capture capabilities cached data to each registered
// UpdateCallback.
void SendVideoCaptureDeviceCapabilities();
// Called to inform of the capabilities enumerated for video devices.
void UpdateVideoCaptureDeviceCapabilities(
const std::vector<std::tuple<media::VideoCaptureDeviceDescriptor,
media::VideoCaptureFormats>>&
descriptors_and_formats);
// AudioLogFactory implementation. Safe to call from any thread.
std::unique_ptr<media::AudioLog> CreateAudioLog(
AudioComponent component) override;
// If possible, i.e. a WebContents exists for the given RenderFrameHostID,
// tells an existing AudioLogEntry the WebContents title for easier
// differentiation on the UI.
void SetWebContentsTitleForAudioLogEntry(int component_id,
int render_process_id,
int render_frame_id,
media::AudioLog* audio_log);
void OnProcessTerminatedForTesting(int process_id);
private:
// Inner class to handle reporting pipelinestatus to UMA
class MediaInternalsUMAHandler;
friend class AudioLogImpl;
MediaInternals();
// Sends |update| to each registered UpdateCallback. Safe to call from any
// thread, but will forward to the IO thread.
void SendUpdate(const base::string16& update);
// Saves |event| so that it can be sent later in SendHistoricalMediaEvents().
void SaveEvent(int process_id, const media::MediaLogEvent& event);
// Caches |value| under |cache_key| so that future UpdateAudioLog() calls
// will include the current data. Calls JavaScript |function|(|value|) for
// each registered UpdateCallback (if any).
enum AudioLogUpdateType {
CREATE, // Creates a new AudioLog cache entry.
UPDATE_IF_EXISTS, // Updates an existing AudioLog cache entry, does
// nothing if it doesn't exist.
UPDATE_AND_DELETE, // Deletes an existing AudioLog cache entry.
};
void UpdateAudioLog(AudioLogUpdateType type,
const std::string& cache_key,
const std::string& function,
const base::DictionaryValue* value);
std::unique_ptr<ukm::UkmEntryBuilder> CreateUkmBuilder(
const GURL& url,
const char* event_name);
// Must only be accessed on the UI thread.
std::vector<UpdateCallback> update_callbacks_;
// Saved events by process ID for showing recent players in the UI.
std::map<int, std::list<media::MediaLogEvent>> saved_events_by_process_;
// Must only be accessed on the IO thread.
base::ListValue video_capture_capabilities_cached_data_;
NotificationRegistrar registrar_;
// All variables below must be accessed under |lock_|.
base::Lock lock_;
bool can_update_;
base::DictionaryValue audio_streams_cached_data_;
int owner_ids_[AUDIO_COMPONENT_MAX];
std::unique_ptr<MediaInternalsUMAHandler> uma_handler_;
DISALLOW_COPY_AND_ASSIGN(MediaInternals);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_
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