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device_media_to_mojo_adapter.cc
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device_media_to_mojo_adapter.cc
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// Copyright 2016 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 "services/video_capture/device_media_to_mojo_adapter.h"
#include "base/logging.h"
#include "media/base/bind_to_current_loop.h"
#include "media/capture/video/video_capture_buffer_pool_impl.h"
#include "media/capture/video/video_capture_buffer_tracker_factory_impl.h"
#include "media/capture/video/video_capture_jpeg_decoder.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "services/video_capture/receiver_mojo_to_media_adapter.h"
namespace video_capture {
DeviceMediaToMojoAdapter::DeviceMediaToMojoAdapter(
std::unique_ptr<service_manager::ServiceContextRef> service_ref,
std::unique_ptr<media::VideoCaptureDevice> device,
const media::VideoCaptureJpegDecoderFactoryCB&
jpeg_decoder_factory_callback)
: service_ref_(std::move(service_ref)),
device_(std::move(device)),
jpeg_decoder_factory_callback_(jpeg_decoder_factory_callback),
device_started_(false),
weak_factory_(this) {}
DeviceMediaToMojoAdapter::~DeviceMediaToMojoAdapter() {
DCHECK(thread_checker_.CalledOnValidThread());
if (device_started_)
device_->StopAndDeAllocate();
}
void DeviceMediaToMojoAdapter::Start(
const media::VideoCaptureParams& requested_settings,
mojom::ReceiverPtr receiver) {
DCHECK(thread_checker_.CalledOnValidThread());
receiver.set_connection_error_handler(
base::Bind(&DeviceMediaToMojoAdapter::OnClientConnectionErrorOrClose,
weak_factory_.GetWeakPtr()));
auto receiver_adapter =
std::make_unique<ReceiverMojoToMediaAdapter>(std::move(receiver));
auto media_receiver = std::make_unique<ReceiverOnTaskRunner>(
std::move(receiver_adapter), base::ThreadTaskRunnerHandle::Get());
// Create a dedicated buffer pool for the device usage session.
auto buffer_tracker_factory =
std::make_unique<media::VideoCaptureBufferTrackerFactoryImpl>();
scoped_refptr<media::VideoCaptureBufferPool> buffer_pool(
new media::VideoCaptureBufferPoolImpl(std::move(buffer_tracker_factory),
max_buffer_pool_buffer_count()));
auto device_client = std::make_unique<media::VideoCaptureDeviceClient>(
std::move(media_receiver), buffer_pool, jpeg_decoder_factory_callback_);
device_->AllocateAndStart(requested_settings, std::move(device_client));
device_started_ = true;
}
void DeviceMediaToMojoAdapter::OnReceiverReportingUtilization(
int32_t frame_feedback_id,
double utilization) {
DCHECK(thread_checker_.CalledOnValidThread());
device_->OnUtilizationReport(frame_feedback_id, utilization);
}
void DeviceMediaToMojoAdapter::RequestRefreshFrame() {
if (!device_started_)
return;
device_->RequestRefreshFrame();
}
void DeviceMediaToMojoAdapter::MaybeSuspend() {
if (!device_started_)
return;
device_->MaybeSuspend();
}
void DeviceMediaToMojoAdapter::Resume() {
if (!device_started_)
return;
device_->Resume();
}
void DeviceMediaToMojoAdapter::GetPhotoState(GetPhotoStateCallback callback) {
media::VideoCaptureDevice::GetPhotoStateCallback scoped_callback =
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
media::BindToCurrentLoop(std::move(callback)), nullptr);
device_->GetPhotoState(std::move(scoped_callback));
}
void DeviceMediaToMojoAdapter::SetPhotoOptions(
media::mojom::PhotoSettingsPtr settings,
SetPhotoOptionsCallback callback) {
media::mojom::ImageCapture::SetOptionsCallback scoped_callback =
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
media::BindToCurrentLoop(std::move(callback)), false);
device_->SetPhotoOptions(std::move(settings), std::move(scoped_callback));
}
void DeviceMediaToMojoAdapter::TakePhoto(TakePhotoCallback callback) {
media::mojom::ImageCapture::TakePhotoCallback scoped_callback =
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
media::BindToCurrentLoop(std::move(callback)), nullptr);
device_->TakePhoto(std::move(scoped_callback));
}
void DeviceMediaToMojoAdapter::Stop() {
DCHECK(thread_checker_.CalledOnValidThread());
if (device_started_ == false)
return;
device_started_ = false;
weak_factory_.InvalidateWeakPtrs();
device_->StopAndDeAllocate();
}
void DeviceMediaToMojoAdapter::OnClientConnectionErrorOrClose() {
DCHECK(thread_checker_.CalledOnValidThread());
Stop();
}
// static
int DeviceMediaToMojoAdapter::max_buffer_pool_buffer_count() {
// The maximum number of video frame buffers in-flight at any one time.
// If all buffers are still in use by consumers when new frames are produced
// those frames get dropped.
static const int kMaxBufferCount = 3;
return kMaxBufferCount;
}
} // namespace video_capture