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// 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/command_buffer_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 Scheduler;
// 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> {
public:
// TODO(andrescj): right now, we only accept one worker to be used for JPEG
// decoding. If we want to use multiple workers, we need to ensure that sync
// tokens are released in order.
ImageDecodeAcceleratorStub(ImageDecodeAcceleratorWorker* worker,
GpuChannel* channel,
int32_t route_id);
ImageDecodeAcceleratorStub(const ImageDecodeAcceleratorStub&) = delete;
ImageDecodeAcceleratorStub& operator=(const ImageDecodeAcceleratorStub&) =
delete;
// Processes a decode request. Must be called on the IO thread.
// `release_count` will be released on completion, no matter whether the
// operation is successful or not.
void ScheduleImageDecode(mojom::ScheduleImageDecodeParamsPtr params,
uint64_t release_count);
// Called on the main thread to indicate that |channel_| should no longer be
// used.
void Shutdown();
private:
friend class base::RefCountedThreadSafe<ImageDecodeAcceleratorStub>;
~ImageDecodeAcceleratorStub();
// Creates the service-side cache entry for a completed decode. If the decode
// was unsuccessful, no cache entry is created.
void ProcessCompletedDecode(mojom::ScheduleImageDecodeParamsPtr params_ptr);
// Disables |sequence_| if there are no more decodes to process for now.
void FinishCompletedDecode() EXCLUSIVE_LOCKS_REQUIRED(lock_);
// The |worker_| calls this when a decode is completed. |result| is enqueued
// and |sequence_| is enabled so that ProcessCompletedDecode() picks it up.
void OnDecodeCompleted(
gfx::Size expected_output_size,
std::unique_ptr<ImageDecodeAcceleratorWorker::DecodeResult> result);
void ScheduleSyncTokenRelease(const SyncToken& release);
// The object to which the actual decoding can be delegated.
const raw_ptr<ImageDecodeAcceleratorWorker> worker_ = nullptr;
const raw_ptr<Scheduler> scheduler_ = nullptr;
const CommandBufferId command_buffer_id_;
const SequenceId sequence_;
base::Lock lock_;
raw_ptr<GpuChannel> channel_ GUARDED_BY(lock_) = nullptr;
base::queue<std::unique_ptr<ImageDecodeAcceleratorWorker::DecodeResult>>
pending_completed_decodes_ GUARDED_BY(lock_);
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
};
} // namespace gpu
#endif // GPU_IPC_SERVICE_IMAGE_DECODE_ACCELERATOR_STUB_H_
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