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// Copyright 2013 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 CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
#define CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
#include <list>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/resources/release_callback_impl.h"
#include "cc/resources/resource_format.h"
#include "cc/resources/texture_mailbox.h"
#include "ui/gfx/geometry/size.h"
namespace media {
class SkCanvasVideoRenderer;
class VideoFrame;
}
namespace cc {
class ContextProvider;
class ResourceProvider;
class CC_EXPORT VideoFrameExternalResources {
public:
// Specifies what type of data is contained in the mailboxes, as well as how
// many mailboxes will be present.
enum ResourceType {
NONE,
YUV_RESOURCE,
RGB_RESOURCE,
RGBA_RESOURCE,
STREAM_TEXTURE_RESOURCE,
IO_SURFACE,
#if defined(VIDEO_HOLE)
// TODO(danakj): Implement this with a solid color layer instead of a video
// frame and video layer.
HOLE,
#endif // defined(VIDEO_HOLE)
// TODO(danakj): Remove this and abstract TextureMailbox into
// "ExternalResource" that can hold a hardware or software backing.
SOFTWARE_RESOURCE
};
ResourceType type;
std::vector<TextureMailbox> mailboxes;
std::vector<ReleaseCallbackImpl> release_callbacks;
// TODO(danakj): Remove these too.
std::vector<unsigned> software_resources;
ReleaseCallbackImpl software_release_callback;
VideoFrameExternalResources();
~VideoFrameExternalResources();
};
// VideoResourceUpdater is used by the video system to produce frame content as
// resources consumable by the compositor.
class CC_EXPORT VideoResourceUpdater
: public base::SupportsWeakPtr<VideoResourceUpdater> {
public:
VideoResourceUpdater(ContextProvider* context_provider,
ResourceProvider* resource_provider);
~VideoResourceUpdater();
VideoFrameExternalResources CreateExternalResourcesFromVideoFrame(
const scoped_refptr<media::VideoFrame>& video_frame);
private:
struct PlaneResource {
unsigned resource_id;
gfx::Size resource_size;
ResourceFormat resource_format;
gpu::Mailbox mailbox;
// The balance between the number of times this resource has been returned
// from CreateForSoftwarePlanes vs released in RecycleResource.
int ref_count;
// These last three members will be used for identifying the data stored in
// this resource, and uniquely identifies a media::VideoFrame plane. The
// frame pointer will only be used for pointer comparison, i.e. the
// underlying data will not be accessed.
const void* frame_ptr;
int plane_index;
base::TimeDelta timestamp;
PlaneResource(unsigned resource_id,
const gfx::Size& resource_size,
ResourceFormat resource_format,
gpu::Mailbox mailbox);
};
static bool PlaneResourceMatchesUniqueID(const PlaneResource& plane_resource,
const media::VideoFrame* video_frame,
int plane_index);
static void SetPlaneResourceUniqueId(const media::VideoFrame* video_frame,
int plane_index,
PlaneResource* plane_resource);
// This needs to be a container where iterators can be erased without
// invalidating other iterators.
typedef std::list<PlaneResource> ResourceList;
ResourceList::iterator AllocateResource(const gfx::Size& plane_size,
ResourceFormat format,
bool has_mailbox);
void DeleteResource(ResourceList::iterator resource_it);
bool VerifyFrame(const scoped_refptr<media::VideoFrame>& video_frame);
VideoFrameExternalResources CreateForHardwarePlanes(
const scoped_refptr<media::VideoFrame>& video_frame);
VideoFrameExternalResources CreateForSoftwarePlanes(
const scoped_refptr<media::VideoFrame>& video_frame);
static void RecycleResource(base::WeakPtr<VideoResourceUpdater> updater,
unsigned resource_id,
uint32 sync_point,
bool lost_resource,
BlockingTaskRunner* main_thread_task_runner);
static void ReturnTexture(base::WeakPtr<VideoResourceUpdater> updater,
const scoped_refptr<media::VideoFrame>& video_frame,
uint32 sync_point,
bool lost_resource,
BlockingTaskRunner* main_thread_task_runner);
ContextProvider* context_provider_;
ResourceProvider* resource_provider_;
scoped_ptr<media::SkCanvasVideoRenderer> video_renderer_;
std::vector<uint8_t> upload_pixels_;
// Recycle resources so that we can reduce the number of allocations and
// data transfers.
ResourceList all_resources_;
DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
};
} // namespace cc
#endif // CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
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