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// Copyright (c) 2011 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 MEDIA_BASE_MEDIA_LOG_H_
#define MEDIA_BASE_MEDIA_LOG_H_
#pragma once
#include "base/memory/ref_counted.h"
#include "base/synchronization/lock.h"
#include "media/base/media_export.h"
#include "media/base/media_log_event.h"
#include "media/base/pipeline_impl.h"
#include "media/base/pipeline_status.h"
namespace media {
class MEDIA_EXPORT MediaLog : public base::RefCountedThreadSafe<MediaLog> {
public:
// Convert various enums to strings.
static const char* EventTypeToString(MediaLogEvent::Type type);
static const char* PipelineStateToString(PipelineImpl::State);
static const char* PipelineStatusToString(PipelineStatus);
MediaLog();
// Add an event to this log. Overriden by inheritors to actually do something
// with it.
// Takes ownership of |event|.
virtual void AddEvent(MediaLogEvent* event);
// Helper methods to create events and their parameters.
MediaLogEvent* CreateEvent(MediaLogEvent::Type type);
MediaLogEvent* CreateBooleanEvent(MediaLogEvent::Type type,
const char* property, bool value);
MediaLogEvent* CreateIntegerEvent(MediaLogEvent::Type type,
const char* property, int64 value);
MediaLogEvent* CreateTimeEvent(MediaLogEvent::Type type,
const char* property, base::TimeDelta value);
MediaLogEvent* CreateLoadEvent(const std::string& url);
MediaLogEvent* CreateSeekEvent(float seconds);
MediaLogEvent* CreatePipelineStateChangedEvent(PipelineImpl::State state);
MediaLogEvent* CreatePipelineErrorEvent(PipelineStatus error);
MediaLogEvent* CreateVideoSizeSetEvent(size_t width, size_t height);
MediaLogEvent* CreateBufferedExtentsChangedEvent(size_t start, size_t current,
size_t end);
// Called when the pipeline statistics have been updated.
// This gets called every frame, so we send the most recent stats after 500ms.
// This function is NOT thread safe.
void QueueStatisticsUpdatedEvent(PipelineStatistics stats);
protected:
friend class base::RefCountedThreadSafe<MediaLog>;
virtual ~MediaLog();
private:
// Actually add a STATISTICS_UPDATED event.
void AddStatisticsUpdatedEvent();
// A unique (to this process) id for this MediaLog.
int32 id_;
// The most recent set of pipeline stats.
PipelineStatistics last_statistics_;
bool stats_update_pending_;
base::Lock stats_lock_;
DISALLOW_COPY_AND_ASSIGN(MediaLog);
};
} // namespace media
#endif // MEDIA_BASE_MEDIA_LOG_H_
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