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// Copyright 2015 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 MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODE_ACCELERATOR_H_
#define MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODE_ACCELERATOR_H_
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread.h"
#include "media/gpu/media_gpu_export.h"
#include "media/video/jpeg_decode_accelerator.h"
// These data types are defined in va/va.h using typedef, reproduced here.
typedef struct _VAImageFormat VAImageFormat;
typedef unsigned int VASurfaceID;
namespace media {
class BitstreamBuffer;
struct JpegParseResult;
class UnalignedSharedMemory;
class VaapiWrapper;
class VaapiJpegDecodeAcceleratorTest;
// Class to provide JPEG decode acceleration for Intel systems with hardware
// support for it, and on which libva is available.
// Decoding tasks are performed in a separate decoding thread.
//
// Threading/life-cycle: this object is created & destroyed on the GPU
// ChildThread. A few methods on it are called on the decoder thread which is
// stopped during |this->Destroy()|, so any tasks posted to the decoder thread
// can assume |*this| is still alive. See |weak_this_| below for more details.
class MEDIA_GPU_EXPORT VaapiJpegDecodeAccelerator
: public JpegDecodeAccelerator {
public:
VaapiJpegDecodeAccelerator(
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
~VaapiJpegDecodeAccelerator() override;
// JpegDecodeAccelerator implementation.
bool Initialize(JpegDecodeAccelerator::Client* client) override;
void Decode(const BitstreamBuffer& bitstream_buffer,
const scoped_refptr<VideoFrame>& video_frame) override;
bool IsSupported() override;
private:
friend class VaapiJpegDecodeAcceleratorTest;
// Notifies the client that an error has occurred and decoding cannot
// continue. The client is notified on the |task_runner_|, i.e., the thread in
// which |*this| was created.
void NotifyError(int32_t bitstream_buffer_id, Error error);
// Notifies the client that a decode is ready. The client is notified on the
// |task_runner_|, i.e., the thread in which |*this| was created.
void VideoFrameReady(int32_t bitstream_buffer_id);
// Processes one decode request.
void DecodeTask(int32_t bitstream_buffer_id,
std::unique_ptr<UnalignedSharedMemory> shm,
scoped_refptr<VideoFrame> video_frame);
// Puts contents of |va_surface| into given |video_frame|, releases the
// surface and passes the |input_buffer_id| of the resulting picture to
// client for output.
bool OutputPicture(VASurfaceID va_surface_id,
int32_t input_buffer_id,
const scoped_refptr<VideoFrame>& video_frame);
// Decodes a JPEG picture. It will fill VA-API parameters and call
// corresponding VA-API methods according to the JPEG |parse_result|. Decoded
// data will be outputted to the given |va_surface|. Returns false on failure.
// |vaapi_wrapper| should be initialized in kDecode mode with
// VAProfileJPEGBaseline profile. |va_surface| should be created with size at
// least as large as the picture size.
static bool DoDecode(VaapiWrapper* vaapi_wrapper,
const JpegParseResult& parse_result,
VASurfaceID va_surface);
// ChildThread's task runner.
const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
// GPU IO task runner.
const scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// The client of this class.
Client* client_;
scoped_refptr<VaapiWrapper> vaapi_wrapper_;
// Comes after vaapi_wrapper_ to ensure its destructor is executed before
// |vaapi_wrapper_| is destroyed.
base::Thread decoder_thread_;
// Use this to post tasks to |decoder_thread_| instead of
// |decoder_thread_.task_runner()| because the latter will be NULL once
// |decoder_thread_.Stop()| returns.
scoped_refptr<base::SingleThreadTaskRunner> decoder_task_runner_;
// The current VA surface for decoding.
VASurfaceID va_surface_id_;
// The coded size associated with |va_surface_id_|.
gfx::Size coded_size_;
// The VA RT format associated with |va_surface_id_|.
unsigned int va_rt_format_;
// The VA image format that will be requested from the VA API.
std::unique_ptr<VAImageFormat> va_image_format_;
// WeakPtr factory for use in posting tasks from |decoder_task_runner_| back
// to |task_runner_|. Since |decoder_thread_| is a fully owned member of
// this class, tasks posted to it may use base::Unretained(this), and tasks
// posted from the |decoder_task_runner_| to |task_runner_| should use a
// WeakPtr (obtained via weak_this_factory_.GetWeakPtr()).
base::WeakPtrFactory<VaapiJpegDecodeAccelerator> weak_this_factory_;
DISALLOW_COPY_AND_ASSIGN(VaapiJpegDecodeAccelerator);
};
} // namespace media
#endif // MEDIA_GPU_VAAPI_VAAPI_JPEG_DECODE_ACCELERATOR_H_