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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/capture_mode/fake_video_source_provider.h"
#include "base/check.h"
#include "base/system/system_monitor.h"
#include "base/task/single_thread_task_runner.h"
#include "media/base/video_types.h"
#include "media/capture/video/video_capture_device_descriptor.h"
#include "media/capture/video_capture_types.h"
namespace ash {
namespace {
// Triggers a notification that video capture devices have changed.
void NotifyVideoCaptureDevicesChanged() {
base::SystemMonitor::Get()->ProcessDevicesChanged(
base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE);
}
media::VideoCaptureFormat CreateCaptureFormat(const gfx::Size& frame_size,
float frame_rate) {
return media::VideoCaptureFormat(frame_size, frame_rate,
media::PIXEL_FORMAT_I420);
}
media::VideoCaptureFormats GenerateCaptureFormatList() {
return media::VideoCaptureFormats{
CreateCaptureFormat(gfx::Size(160, 120), 30.f),
CreateCaptureFormat(gfx::Size(160, 120), 20.f),
CreateCaptureFormat(gfx::Size(176, 144), 30.f),
CreateCaptureFormat(gfx::Size(176, 144), 24.f),
CreateCaptureFormat(gfx::Size(320, 180), 30.f),
CreateCaptureFormat(gfx::Size(320, 180), 24.f),
CreateCaptureFormat(gfx::Size(320, 180), 7.f),
};
}
media::VideoCaptureDeviceInfo CreateCaptureDeviceInfo(
const std::string& device_id,
const std::string& display_name,
const std::string& model_id,
media::VideoFacingMode camera_facing_mode) {
media::VideoCaptureDeviceInfo info{media::VideoCaptureDeviceDescriptor(
display_name, device_id, model_id, media::VideoCaptureApi::UNKNOWN,
media::VideoCaptureControlSupport())};
info.supported_formats = GenerateCaptureFormatList();
info.descriptor.facing = camera_facing_mode;
return info;
}
} // namespace
FakeVideoSourceProvider::FakeVideoSourceProvider() = default;
FakeVideoSourceProvider::~FakeVideoSourceProvider() = default;
void FakeVideoSourceProvider::Bind(
mojo::PendingReceiver<video_capture::mojom::VideoSourceProvider>
pending_receiver) {
receiver_.Bind(std::move(pending_receiver));
}
void FakeVideoSourceProvider::TriggerFatalErrorOnCamera(
const std::string& device_id) {
DCHECK(devices_map_.contains(device_id));
devices_map_.at(device_id)->TriggerFatalError();
}
void FakeVideoSourceProvider::AddFakeCamera(
const std::string& device_id,
const std::string& display_name,
const std::string& model_id,
media::VideoFacingMode camera_facing_mode) {
AddFakeCameraWithoutNotifying(device_id, display_name, model_id,
camera_facing_mode);
NotifyVideoCaptureDevicesChanged();
}
void FakeVideoSourceProvider::AddFakeCameraWithoutNotifying(
const std::string& device_id,
const std::string& display_name,
const std::string& model_id,
media::VideoFacingMode camera_facing_mode) {
const auto iter = devices_map_.emplace(
device_id, std::make_unique<FakeCameraDevice>(CreateCaptureDeviceInfo(
device_id, display_name, model_id, camera_facing_mode)));
DCHECK(iter.second);
}
void FakeVideoSourceProvider::RemoveFakeCamera(const std::string& device_id) {
RemoveFakeCameraWithoutNotifying(device_id);
NotifyVideoCaptureDevicesChanged();
}
void FakeVideoSourceProvider::RemoveFakeCameraWithoutNotifying(
const std::string& device_id) {
DCHECK(devices_map_.contains(device_id));
devices_map_.erase(device_id);
}
void FakeVideoSourceProvider::GetSourceInfos(GetSourceInfosCallback callback) {
DCHECK(callback);
std::vector<media::VideoCaptureDeviceInfo> devices;
for (const auto& pair : devices_map_)
devices.emplace_back(pair.second->device_info());
// Simulate the asynchronously behavior of the actual VideoSourceProvider
// which does a lot of asynchronous and mojo calls.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback),
video_capture::mojom::VideoSourceProvider::
GetSourceInfosResult::kSuccess,
devices));
if (on_replied_with_source_infos_)
std::move(on_replied_with_source_infos_).Run();
}
void FakeVideoSourceProvider::GetVideoSource(
const std::string& source_id,
mojo::PendingReceiver<video_capture::mojom::VideoSource> stream) {
// The camera device may get removed after the client has issued an
// asynchronous mojo call to `GetVideoSource()`.
auto iter = devices_map_.find(source_id);
if (iter == devices_map_.end())
return;
iter->second->Bind(std::move(stream));
}
} // namespace ash
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