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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/dbus/cec_service/cec_service_client.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "chromeos/ash/components/dbus/cec_service/fake_cec_service_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
namespace {
CecServiceClient* g_instance = nullptr;
// Translates a power state from a D-Bus response to the types exposed by
// CecServiceClient.
CecServiceClient::PowerState ConvertDBusPowerState(int32_t power_state) {
switch (power_state) {
case cecservice::kTvPowerStatusError:
return CecServiceClient::PowerState::kError;
case cecservice::kTvPowerStatusAdapterNotConfigured:
return CecServiceClient::PowerState::kAdapterNotConfigured;
case cecservice::kTvPowerStatusNoTv:
return CecServiceClient::PowerState::kNoDevice;
case cecservice::kTvPowerStatusOn:
return CecServiceClient::PowerState::kOn;
case cecservice::kTvPowerStatusStandBy:
return CecServiceClient::PowerState::kStandBy;
case cecservice::kTvPowerStatusToOn:
return CecServiceClient::PowerState::kTransitioningToOn;
case cecservice::kTvPowerStatusToStandBy:
return CecServiceClient::PowerState::kTransitioningToStandBy;
case cecservice::kTvPowerStatusUnknown:
return CecServiceClient::PowerState::kUnknown;
default:
NOTREACHED() << "Received unknown state " << power_state;
}
}
void OnGetTvsPowerStatus(CecServiceClient::PowerStateCallback callback,
dbus::Response* response) {
if (!response) {
LOG(ERROR) << "QueryDisplayCecPowerState call failed, no response";
std::move(callback).Run({});
return;
}
dbus::MessageReader reader(response);
dbus::MessageReader array_reader(nullptr);
if (!reader.PopArray(&array_reader)) {
LOG(ERROR) << "Unable to read back array for QueryDisplayCecPowerState";
std::move(callback).Run({});
return;
}
std::vector<CecServiceClient::PowerState> result;
while (array_reader.HasMoreData()) {
int32_t low_level_power_state = -1;
if (!array_reader.PopInt32(&low_level_power_state)) {
LOG(ERROR) << "Unable to pop state for QueryDisplayCecPowerState";
std::move(callback).Run({});
return;
}
result.push_back(ConvertDBusPowerState(low_level_power_state));
}
std::move(callback).Run(result);
}
// Real implementation of CecServiceClient.
class CecServiceClientImpl : public CecServiceClient {
public:
CecServiceClientImpl() = default;
CecServiceClientImpl(const CecServiceClientImpl&) = delete;
CecServiceClientImpl& operator=(const CecServiceClientImpl&) = delete;
~CecServiceClientImpl() override = default;
void SendStandBy() override {
dbus::MethodCall method_call(cecservice::kCecServiceInterface,
cecservice::kSendStandByToAllDevicesMethod);
cec_service_proxy_->CallMethod(&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::DoNothing());
}
void SendWakeUp() override {
dbus::MethodCall method_call(cecservice::kCecServiceInterface,
cecservice::kSendWakeUpToAllDevicesMethod);
cec_service_proxy_->CallMethod(&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::DoNothing());
}
void QueryDisplayCecPowerState(PowerStateCallback callback) override {
dbus::MethodCall query_method(cecservice::kCecServiceInterface,
cecservice::kGetTvsPowerStatus);
cec_service_proxy_->CallMethod(
&query_method, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&OnGetTvsPowerStatus, std::move(callback)));
}
void Init(dbus::Bus* bus) override {
cec_service_proxy_ =
bus->GetObjectProxy(cecservice::kCecServiceName,
dbus::ObjectPath(cecservice::kCecServicePath));
}
private:
scoped_refptr<dbus::ObjectProxy> cec_service_proxy_;
};
} // namespace
////////////////////////////////////////////////////////////////////////////////
// CecServiceClient
// static
CecServiceClient* CecServiceClient::Get() {
return g_instance;
}
// static
void CecServiceClient::Initialize(dbus::Bus* bus) {
CHECK(bus);
(new CecServiceClientImpl())->Init(bus);
}
// static
void CecServiceClient::InitializeFake() {
(new FakeCecServiceClient())->Init(nullptr);
}
// static
void CecServiceClient::Shutdown() {
CHECK(g_instance);
delete g_instance;
}
CecServiceClient::CecServiceClient() {
CHECK(!g_instance);
g_instance = this;
}
CecServiceClient::~CecServiceClient() {
CHECK_EQ(g_instance, this);
g_instance = nullptr;
}
} // namespace ash
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