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// Copyright 2018 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_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_JPEG_DECODER_IMPL_H_
#define MEDIA_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_JPEG_DECODER_IMPL_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "components/chromeos_camera/mojo_mjpeg_decode_accelerator.h"
#include "gpu/config/gpu_info.h"
#include "media/capture/capture_export.h"
#include "media/capture/video/chromeos/video_capture_device_factory_chromeos.h"
#include "media/capture/video/chromeos/video_capture_jpeg_decoder.h"
#include "media/capture/video/video_capture_device_factory.h"
namespace media {
// Implementation of media::VideoCaptureJpegDecoder that delegates to a
// chromeos_camera::mojom::MjpegDecodeAccelerator. When a frame is received in
// DecodeCapturedData(), it is copied to |in_shared_memory| for IPC transport
// to |decoder_|. When the decoder is finished with the frame, |decode_done_cb_|
// is invoked. Until |decode_done_cb_| is invoked, subsequent calls to
// DecodeCapturedData() are ignored.
// The given |decoder_task_runner| must allow blocking on |lock_|.
// Instances must be destroyed on |decoder_task_runner|, but the
// media::VideoCaptureJpegDecoder methods may be called from any thread.
class CAPTURE_EXPORT VideoCaptureJpegDecoderImpl
: public VideoCaptureJpegDecoder,
public chromeos_camera::MjpegDecodeAccelerator::Client {
public:
VideoCaptureJpegDecoderImpl(
MojoMjpegDecodeAcceleratorFactoryCB jpeg_decoder_factory,
scoped_refptr<base::SequencedTaskRunner> decoder_task_runner,
DecodeDoneCB decode_done_cb,
base::RepeatingCallback<void(const std::string&)> send_log_message_cb);
~VideoCaptureJpegDecoderImpl() override;
// Implementation of VideoCaptureJpegDecoder:
void Initialize() override;
STATUS GetStatus() const override;
void DecodeCapturedData(
const uint8_t* data,
size_t in_buffer_size,
const media::VideoCaptureFormat& frame_format,
base::TimeTicks reference_time,
base::TimeDelta timestamp,
media::VideoCaptureDevice::Client::Buffer out_buffer) override;
// chromeos_camera::MjpegDecodeAccelerator::Client implementation.
// These will be called on |decoder_task_runner|.
void VideoFrameReady(int32_t buffer_id) override;
void NotifyError(
int32_t buffer_id,
chromeos_camera::MjpegDecodeAccelerator::Error error) override;
private:
void FinishInitialization();
void OnInitializationDone(bool success);
// Returns true if the decoding of last frame is not finished yet.
bool IsDecoding_Locked() const;
// Records |decoder_status_| to histogram.
void RecordInitDecodeUMA_Locked();
void DestroyDecoderOnIOThread(base::WaitableEvent* event);
MojoMjpegDecodeAcceleratorFactoryCB jpeg_decoder_factory_;
scoped_refptr<base::SequencedTaskRunner> decoder_task_runner_;
// The underlying JPEG decode accelerator.
std::unique_ptr<chromeos_camera::MjpegDecodeAccelerator> decoder_;
// The callback to run when decode succeeds.
const DecodeDoneCB decode_done_cb_;
const base::RepeatingCallback<void(const std::string&)> send_log_message_cb_;
bool has_received_decoded_frame_;
// Guards |decode_done_closure_| and |decoder_status_|.
mutable base::Lock lock_;
// The closure of |decode_done_cb_| with bound parameters.
base::OnceClosure decode_done_closure_;
// Next id for input BitstreamBuffer.
int32_t next_bitstream_buffer_id_;
// The id for current input BitstreamBuffer being decoded.
int32_t in_buffer_id_;
// Shared memory to store JPEG stream buffer. The input BitstreamBuffer is
// backed by this.
std::unique_ptr<base::SharedMemory> in_shared_memory_;
STATUS decoder_status_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<VideoCaptureJpegDecoderImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(VideoCaptureJpegDecoderImpl);
};
} // namespace media
#endif // MEDIA_CAPTURE_VIDEO_CHROMEOS_VIDEO_CAPTURE_JPEG_DECODER_IMPL_H_
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