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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/chromeos_camera/mojo_mjpeg_decode_accelerator.h"
#include <stddef.h>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"
#include "mojo/public/cpp/system/platform_handle.h"
namespace chromeos_camera {
MojoMjpegDecodeAccelerator::MojoMjpegDecodeAccelerator(
scoped_refptr<base::SequencedTaskRunner> io_task_runner,
mojo::PendingRemote<chromeos_camera::mojom::MjpegDecodeAccelerator>
jpeg_decoder)
: io_task_runner_(std::move(io_task_runner)),
jpeg_decoder_remote_(std::move(jpeg_decoder)) {}
MojoMjpegDecodeAccelerator::~MojoMjpegDecodeAccelerator() {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
}
void MojoMjpegDecodeAccelerator::InitializeAsync(
MjpegDecodeAccelerator::Client* client,
MjpegDecodeAccelerator::InitCB init_cb) {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
jpeg_decoder_.Bind(std::move(jpeg_decoder_remote_));
// base::Unretained is safe because |this| owns |jpeg_decoder_|.
jpeg_decoder_.set_disconnect_handler(
base::BindOnce(&MojoMjpegDecodeAccelerator::OnLostConnectionToJpegDecoder,
base::Unretained(this)));
jpeg_decoder_->Initialize(
base::BindOnce(&MojoMjpegDecodeAccelerator::OnInitializeDone,
base::Unretained(this), std::move(init_cb), client));
}
void MojoMjpegDecodeAccelerator::Decode(
media::BitstreamBuffer bitstream_buffer,
media::VideoPixelFormat format,
const gfx::Size& coded_size,
base::UnsafeSharedMemoryRegion output_region) {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
DCHECK(jpeg_decoder_.is_bound());
const size_t output_buffer_size =
media::VideoFrame::AllocationSize(format, coded_size);
DCHECK_GE(output_region.GetSize(), output_buffer_size);
mojo::ScopedSharedBufferHandle output_frame_handle =
mojo::WrapUnsafeSharedMemoryRegion(std::move(output_region));
if (!output_frame_handle.is_valid()) {
DLOG(ERROR) << "Failed to duplicate handle of VideoFrame";
return;
}
// base::Unretained is safe because |this| owns |jpeg_decoder_|.
jpeg_decoder_->Decode(std::move(bitstream_buffer), coded_size,
std::move(output_frame_handle),
base::checked_cast<uint32_t>(output_buffer_size),
base::BindOnce(&MojoMjpegDecodeAccelerator::OnDecodeAck,
base::Unretained(this)));
}
bool MojoMjpegDecodeAccelerator::IsSupported() {
return true;
}
void MojoMjpegDecodeAccelerator::OnInitializeDone(
MjpegDecodeAccelerator::InitCB init_cb,
MjpegDecodeAccelerator::Client* client,
bool success) {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
if (success)
client_ = client;
std::move(init_cb).Run(success);
}
void MojoMjpegDecodeAccelerator::OnDecodeAck(
int32_t bitstream_buffer_id,
::chromeos_camera::MjpegDecodeAccelerator::Error error) {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
if (!client_)
return;
if (error == ::chromeos_camera::MjpegDecodeAccelerator::Error::NO_ERRORS) {
client_->VideoFrameReady(bitstream_buffer_id);
return;
}
// Only NotifyError once.
// Client::NotifyError() may trigger deletion of |this|, so calling it needs
// to be the last thing done on this stack!
MjpegDecodeAccelerator::Client* client = client_;
client_ = nullptr;
client->NotifyError(bitstream_buffer_id, error);
}
void MojoMjpegDecodeAccelerator::OnLostConnectionToJpegDecoder() {
DCHECK(io_task_runner_->RunsTasksInCurrentSequence());
OnDecodeAck(
MjpegDecodeAccelerator::kInvalidTaskId,
::chromeos_camera::MjpegDecodeAccelerator::Error::PLATFORM_FAILURE);
}
} // namespace chromeos_camera
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