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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_layers_CompositionRecorder_h
#define mozilla_layers_CompositionRecorder_h
#include "mozilla/RefPtr.h"
#include "mozilla/TimeStamp.h"
#include "nsISupportsImpl.h"
#include "nsTArray.h"
#include "nsString.h"
namespace mozilla {
namespace gfx {
class DataSourceSurface;
}
namespace layers {
/**
* A captured frame from a |LayerManager|.
*/
class RecordedFrame {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RecordedFrame)
// The resulting DataSourceSurface must not be kept alive beyond the lifetime
// of the RecordedFrame object, since it may refer to data owned by the frame.
virtual already_AddRefed<gfx::DataSourceSurface> GetSourceSurface() = 0;
TimeStamp GetTimeStamp() { return mTimeStamp; }
protected:
virtual ~RecordedFrame() = default;
RecordedFrame(const TimeStamp& aTimeStamp) : mTimeStamp(aTimeStamp) {}
private:
TimeStamp mTimeStamp;
};
/**
* A recorded frame that has been encoded into a data: URI.
*/
struct CollectedFrame {
CollectedFrame(double aTimeOffset, nsCString&& aDataUri)
: mTimeOffset(aTimeOffset), mDataUri(std::move(aDataUri)) {}
double mTimeOffset;
nsCString mDataUri;
};
/**
* All of the frames collected during a composition recording session.
*/
struct CollectedFrames {
CollectedFrames(double aRecordingStart, nsTArray<CollectedFrame>&& aFrames)
: mRecordingStart(aRecordingStart), mFrames(std::move(aFrames)) {}
double mRecordingStart;
nsTArray<CollectedFrame> mFrames;
};
/**
* A recorder for composited frames.
*
* This object collects frames sent to it by a |LayerManager| and writes them
* out as a series of images until recording has finished.
*
* If GPU-accelerated rendering is used, the frames will not be mapped into
* memory until |WriteCollectedFrames| is called.
*/
class CompositionRecorder {
public:
explicit CompositionRecorder(TimeStamp aRecordingStart);
/**
* Record a composited frame.
*/
void RecordFrame(RecordedFrame* aFrame);
/**
* Write out the collected frames as a series of timestamped images.
*/
void WriteCollectedFrames();
/**
* Return the collected frames as an array of their timestamps and contents.
*/
CollectedFrames GetCollectedFrames();
protected:
void ClearCollectedFrames();
private:
nsTArray<RefPtr<RecordedFrame>> mCollectedFrames;
TimeStamp mRecordingStart;
};
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_CompositionRecorder_h
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