blob: 4c000475d70510e288b4bf377b60f0e21e9afab6 [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/linked_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/lock.h"
#include "base/threading/thread.h"
#include "media/base/bitstream_buffer.h"
#include "media/gpu/media_gpu_export.h"
#include "media/gpu/shared_memory_region.h"
#include "media/gpu/vaapi_jpeg_decoder.h"
#include "media/gpu/vaapi_wrapper.h"
#include "media/video/jpeg_decode_accelerator.h"
namespace media {
// 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;
// An input buffer and the corresponding output video frame awaiting
// consumption, provided by the client.
struct DecodeRequest {
DecodeRequest(int32_t bitstream_buffer_id,
std::unique_ptr<SharedMemoryRegion> shm,
const scoped_refptr<VideoFrame>& video_frame);
int32_t bitstream_buffer_id;
std::unique_ptr<SharedMemoryRegion> shm;
scoped_refptr<VideoFrame> video_frame;
// Notifies the client that an error has occurred and decoding cannot
// continue.
void NotifyError(int32_t bitstream_buffer_id, Error error);
void NotifyErrorFromDecoderThread(int32_t bitstream_buffer_id, Error error);
void VideoFrameReady(int32_t bitstream_buffer_id);
// Processes one decode |request|.
void DecodeTask(const std::unique_ptr<DecodeRequest>& request);
// 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);
// ChildThread's task runner.
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
// GPU IO task runner.
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
// The client of this class.
Client* client_;
// WeakPtr<> pointing to |this| for use in posting tasks from the decoder
// thread back to the ChildThread. Because the decoder thread is a member of
// this class, any task running on the decoder thread is guaranteed that this
// object is still alive. As a result, tasks posted from ChildThread to
// decoder thread should use base::Unretained(this), and tasks posted from the
// decoder thread to the ChildThread should use |weak_this_|.
base::WeakPtr<VaapiJpegDecodeAccelerator> weak_this_;
scoped_refptr<VaapiWrapper> vaapi_wrapper_;
// Comes after vaapi_wrapper_ to ensure its destructor is executed before
// |vaapi_wrapper_| is destroyed.
std::unique_ptr<VaapiJpegDecoder> decoder_;
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 WeakPtrFactory for |weak_this_|.
base::WeakPtrFactory<VaapiJpegDecodeAccelerator> weak_this_factory_;
} // namespace media