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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_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
#define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
#include <stdint.h>
#include <map>
#include <vector>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/shared_memory.h"
#include "base/synchronization/waitable_event.h"
#include "content/common/gpu/gpu_command_buffer_stub.h"
#include "content/common/gpu/media/gpu_video_decode_accelerator_helpers.h"
#include "gpu/command_buffer/service/texture_manager.h"
#include "gpu/config/gpu_info.h"
#include "ipc/ipc_listener.h"
#include "ipc/ipc_sender.h"
#include "media/video/video_decode_accelerator.h"
#include "ui/gfx/geometry/size.h"
namespace gpu {
struct GpuPreferences;
} // namespace gpu
namespace content {
class GpuVideoDecodeAccelerator
: public IPC::Listener,
public IPC::Sender,
public media::VideoDecodeAccelerator::Client,
public GpuCommandBufferStub::DestructionObserver {
public:
// Each of the arguments to the constructor must outlive this object.
// |stub->decoder()| will be made current around any operation that touches
// the underlying VDA so that it can make GL calls safely.
GpuVideoDecodeAccelerator(
int32_t host_route_id,
GpuCommandBufferStub* stub,
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
// Static query for the capabilities, which includes the supported profiles.
// This query calls the appropriate platform-specific version. The returned
// capabilities will not contain duplicate supported profile entries.
static gpu::VideoDecodeAcceleratorCapabilities GetCapabilities(
const gpu::GpuPreferences& gpu_preferences);
// IPC::Listener implementation.
bool OnMessageReceived(const IPC::Message& message) override;
// media::VideoDecodeAccelerator::Client implementation.
void NotifyCdmAttached(bool success) override;
void ProvidePictureBuffers(uint32_t requested_num_of_buffers,
const gfx::Size& dimensions,
uint32_t texture_target) override;
void DismissPictureBuffer(int32_t picture_buffer_id) override;
void PictureReady(const media::Picture& picture) override;
void NotifyEndOfBitstreamBuffer(int32_t bitstream_buffer_id) override;
void NotifyFlushDone() override;
void NotifyResetDone() override;
void NotifyError(media::VideoDecodeAccelerator::Error error) override;
// GpuCommandBufferStub::DestructionObserver implementation.
void OnWillDestroyStub() override;
// Function to delegate sending to actual sender.
bool Send(IPC::Message* message) override;
// Initialize VDAs from the set of VDAs supported for current platform until
// one of them succeeds for given |config|. Send the |init_done_msg| when
// done. filter_ is passed to GpuCommandBufferStub channel only if the chosen
// VDA can decode on IO thread.
bool Initialize(const media::VideoDecodeAccelerator::Config& config);
private:
class MessageFilter;
// We only allow self-delete, from OnWillDestroyStub(), after cleanup there.
~GpuVideoDecodeAccelerator() override;
// Handlers for IPC messages.
void OnSetCdm(int cdm_id);
void OnDecode(const media::BitstreamBuffer& bitstream_buffer);
void OnAssignPictureBuffers(const std::vector<int32_t>& buffer_ids,
const std::vector<uint32_t>& texture_ids);
void OnReusePictureBuffer(int32_t picture_buffer_id);
void OnFlush();
void OnReset();
void OnDestroy();
// Called on IO thread when |filter_| has been removed.
void OnFilterRemoved();
// Sets the texture to cleared.
void SetTextureCleared(const media::Picture& picture);
// Route ID to communicate with the host.
const int32_t host_route_id_;
// Unowned pointer to the underlying GpuCommandBufferStub. |this| is
// registered as a DestuctionObserver of |stub_| and will self-delete when
// |stub_| is destroyed.
GpuCommandBufferStub* const stub_;
// The underlying VideoDecodeAccelerator.
scoped_ptr<media::VideoDecodeAccelerator> video_decode_accelerator_;
// Callback to return current GLContext, if available.
GetGLContextCallback get_gl_context_cb_;
// Callback for making the relevant context current for GL calls.
MakeGLContextCurrentCallback make_context_current_cb_;
// Callback to bind a GLImage to a given texture id and target.
BindGLImageCallback bind_image_cb_;
// Callback to return a WeakPtr to GLES2Decoder.
GetGLES2DecoderCallback get_gles2_decoder_cb_;
// The texture dimensions as requested by ProvidePictureBuffers().
gfx::Size texture_dimensions_;
// The texture target as requested by ProvidePictureBuffers().
uint32_t texture_target_;
// The message filter to run VDA::Decode on IO thread if VDA supports it.
scoped_refptr<MessageFilter> filter_;
// Used to wait on for |filter_| to be removed, before we can safely
// destroy the VDA.
base::WaitableEvent filter_removed_;
// GPU child thread task runner.
const scoped_refptr<base::SingleThreadTaskRunner> child_task_runner_;
// GPU IO thread task runner.
const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// Weak pointers will be invalidated on IO thread.
base::WeakPtrFactory<Client> weak_factory_for_io_;
// Protects |uncleared_textures_| when DCHECK is on. This is for debugging
// only. We don't want to hold a lock on IO thread. When DCHECK is off,
// |uncleared_textures_| is only accessed from the child thread.
base::Lock debug_uncleared_textures_lock_;
// A map from picture buffer ID to TextureRef that have not been cleared.
std::map<int32_t, scoped_refptr<gpu::gles2::TextureRef>> uncleared_textures_;
DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
};
} // namespace content
#endif // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
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