blob: 2364ddf5eac7718afb0a67ce2395eb593b27541e [file] [log] [blame]
// 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.
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread.h"
#include "media/gpu/media_gpu_export.h"
#include "media/gpu/vaapi/vaapi_jpeg_decoder.h"
#include "media/video/jpeg_decode_accelerator.h"
namespace base {
class SingleThreadTaskRunner;
namespace media {
class BitstreamBuffer;
class ScopedVAImage;
class UnalignedSharedMemory;
class VideoFrame;
// 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 {
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;
// 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 |image| into given |video_frame| and passes the
// |input_buffer_id| of the resulting picture to client for output.
bool OutputPictureOnTaskRunner(std::unique_ptr<ScopedVAImage> image,
int32_t input_buffer_id,
const scoped_refptr<VideoFrame>& video_frame);
// 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_;
VaapiJpegDecoder decoder_;
// Comes after |decoder_| to ensure its destructor is executed before
// |decoder_| 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_;
// 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_;
} // namespace media