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// Copyright 2020 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 "cast/streaming/rpc_messenger.h"
#include <memory>
#include <string>
#include <utility>
#include "util/osp_logging.h"
namespace openscreen {
namespace cast {
namespace {
std::ostream& operator<<(std::ostream& out, const RpcMessage& message) {
out << "handle=" << message.handle() << ", proc=" << message.proc();
switch (message.rpc_oneof_case()) {
case RpcMessage::kIntegerValue:
return out << ", integer_value=" << message.integer_value();
case RpcMessage::kInteger64Value:
return out << ", integer64_value=" << message.integer64_value();
case RpcMessage::kDoubleValue:
return out << ", double_value=" << message.double_value();
case RpcMessage::kBooleanValue:
return out << ", boolean_value=" << message.boolean_value();
case RpcMessage::kStringValue:
return out << ", string_value=" << message.string_value();
default:
return out << ", rpc_oneof=" << message.rpc_oneof_case();
}
OSP_NOTREACHED();
}
} // namespace
constexpr RpcMessenger::Handle RpcMessenger::kInvalidHandle;
constexpr RpcMessenger::Handle RpcMessenger::kAcquireRendererHandle;
constexpr RpcMessenger::Handle RpcMessenger::kAcquireDemuxerHandle;
constexpr RpcMessenger::Handle RpcMessenger::kFirstHandle;
RpcMessenger::RpcMessenger(SendMessageCallback send_message_cb)
: next_handle_(kFirstHandle),
send_message_cb_(std::move(send_message_cb)) {}
RpcMessenger::~RpcMessenger() {
receive_callbacks_.clear();
}
RpcMessenger::Handle RpcMessenger::GetUniqueHandle() {
return next_handle_++;
}
void RpcMessenger::RegisterMessageReceiverCallback(
RpcMessenger::Handle handle,
ReceiveMessageCallback callback) {
OSP_DCHECK(receive_callbacks_.find(handle) == receive_callbacks_.end())
<< "must deregister before re-registering";
receive_callbacks_.emplace_back(handle, std::move(callback));
}
void RpcMessenger::UnregisterMessageReceiverCallback(RpcMessenger::Handle handle) {
receive_callbacks_.erase_key(handle);
}
void RpcMessenger::ProcessMessageFromRemote(const uint8_t* message,
std::size_t message_len) {
auto rpc = std::make_unique<RpcMessage>();
if (!rpc->ParseFromArray(message, message_len)) {
OSP_DLOG_WARN << "Failed to parse RPC message from remote: \"" << message
<< "\"";
return;
}
ProcessMessageFromRemote(std::move(rpc));
}
void RpcMessenger::ProcessMessageFromRemote(std::unique_ptr<RpcMessage> message) {
const auto entry = receive_callbacks_.find(message->handle());
if (entry == receive_callbacks_.end()) {
OSP_VLOG << "Dropping message due to unregistered handle: "
<< message->handle();
return;
}
entry->second(std::move(message));
}
void RpcMessenger::SendMessageToRemote(const RpcMessage& rpc) {
OSP_VLOG << "Sending RPC message: " << rpc;
std::vector<uint8_t> message(rpc.ByteSizeLong());
rpc.SerializeToArray(message.data(), message.size());
send_message_cb_(std::move(message));
}
bool RpcMessenger::IsRegisteredForTesting(RpcMessenger::Handle handle) {
return receive_callbacks_.find(handle) != receive_callbacks_.end();
}
WeakPtr<RpcMessenger> RpcMessenger::GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
} // namespace cast
} // namespace openscreen
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