chromium/gpu/ipc/service/image_decode_accelerator_stub.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GPU_IPC_SERVICE_IMAGE_DECODE_ACCELERATOR_STUB_H_
#define GPU_IPC_SERVICE_IMAGE_DECODE_ACCELERATOR_STUB_H_

#include <stdint.h>

#include <memory>

#include "base/containers/queue.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_refptr.h"
#include "base/synchronization/lock.h"
#include "base/thread_annotations.h"
#include "gpu/command_buffer/service/sequence_id.h"
#include "gpu/ipc/common/gpu_channel.mojom.h"
#include "gpu/ipc/service/gpu_ipc_service_export.h"
#include "gpu/ipc/service/image_decode_accelerator_worker.h"
#include "ui/gfx/geometry/size.h"

namespace base {
class SingleThreadTaskRunner;
}  // namespace base

namespace gpu {
class GpuChannel;
class SyncPointClientState;

// Processes incoming image decode requests from renderers: it schedules the
// decode with the appropriate hardware decode accelerator and releases sync
// tokens as decodes complete. These sync tokens must be generated on the client
// side (in ImageDecodeAcceleratorProxy) using the following information:
//
// - The command buffer namespace is GPU_IO.
// - The command buffer ID is created using the
//   CommandBufferIdFromChannelAndRoute() function using
//   GpuChannelReservedRoutes::kImageDecodeAccelerator as the route ID.
// - The release count should be incremented for each decode request.
//
// An object of this class is meant to be used in
// both the IO thread (for receiving decode requests) and the main thread (for
// processing completed decodes).
class GPU_IPC_SERVICE_EXPORT ImageDecodeAcceleratorStub
    : public base::RefCountedThreadSafe<ImageDecodeAcceleratorStub> { … };

}  // namespace gpu

#endif  // GPU_IPC_SERVICE_IMAGE_DECODE_ACCELERATOR_STUB_H_