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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/mojo/services/mojo_cdm_service.h"
#include <map>
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/synchronization/lock.h"
#include "base/types/optional_util.h"
#include "build/build_config.h"
#include "media/base/cdm_config.h"
#include "media/base/cdm_context.h"
#include "media/base/cdm_factory.h"
#include "media/base/cdm_key_information.h"
#include "media/base/key_systems.h"
#include "media/mojo/common/media_type_converters.h"
#include "media/mojo/services/mojo_cdm_service_context.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace media {
using SimpleMojoCdmPromise = MojoCdmPromise<void(mojom::CdmPromiseResultPtr)>;
using KeyStatusMojoCdmPromise =
MojoCdmPromise<void(mojom::CdmPromiseResultPtr,
CdmKeyInformation::KeyStatus),
CdmKeyInformation::KeyStatus>;
using NewSessionMojoCdmPromise =
MojoCdmPromise<void(mojom::CdmPromiseResultPtr, const std::string&),
std::string>;
MojoCdmService::MojoCdmService(MojoCdmServiceContext* context)
: context_(context) {
DVLOG(1) << __func__;
DCHECK(context_);
}
MojoCdmService::~MojoCdmService() {
DVLOG(1) << __func__;
if (!cdm_id_)
return;
context_->UnregisterCdm(cdm_id_.value());
}
void MojoCdmService::Initialize(CdmFactory* cdm_factory,
const CdmConfig& cdm_config,
InitializeCB init_cb) {
auto weak_this = weak_factory_.GetWeakPtr();
cdm_factory->Create(
cdm_config,
base::BindRepeating(&MojoCdmService::OnSessionMessage, weak_this),
base::BindRepeating(&MojoCdmService::OnSessionClosed, weak_this),
base::BindRepeating(&MojoCdmService::OnSessionKeysChange, weak_this),
base::BindRepeating(&MojoCdmService::OnSessionExpirationUpdate,
weak_this),
base::BindOnce(&MojoCdmService::OnCdmCreated, weak_this,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
std::move(init_cb), nullptr,
"Mojo CDM Service creation aborted")));
}
void MojoCdmService::SetClient(
mojo::PendingAssociatedRemote<mojom::ContentDecryptionModuleClient>
client) {
client_.Bind(std::move(client));
}
void MojoCdmService::SetServerCertificate(
const std::vector<uint8_t>& certificate_data,
SetServerCertificateCallback callback) {
DVLOG(2) << __func__;
cdm_->SetServerCertificate(
certificate_data,
std::make_unique<SimpleMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::GetStatusForPolicy(HdcpVersion min_hdcp_version,
GetStatusForPolicyCallback callback) {
DVLOG(2) << __func__;
cdm_->GetStatusForPolicy(
min_hdcp_version,
std::make_unique<KeyStatusMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::CreateSessionAndGenerateRequest(
CdmSessionType session_type,
EmeInitDataType init_data_type,
const std::vector<uint8_t>& init_data,
CreateSessionAndGenerateRequestCallback callback) {
DVLOG(2) << __func__;
cdm_->CreateSessionAndGenerateRequest(
session_type, init_data_type, init_data,
std::make_unique<NewSessionMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::LoadSession(CdmSessionType session_type,
const std::string& session_id,
LoadSessionCallback callback) {
DVLOG(2) << __func__;
cdm_->LoadSession(
session_type, session_id,
std::make_unique<NewSessionMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::UpdateSession(const std::string& session_id,
const std::vector<uint8_t>& response,
UpdateSessionCallback callback) {
DVLOG(2) << __func__;
cdm_->UpdateSession(
session_id, response,
std::make_unique<SimpleMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::CloseSession(const std::string& session_id,
CloseSessionCallback callback) {
DVLOG(2) << __func__;
cdm_->CloseSession(
session_id, std::make_unique<SimpleMojoCdmPromise>(std::move(callback)));
}
void MojoCdmService::RemoveSession(const std::string& session_id,
RemoveSessionCallback callback) {
DVLOG(2) << __func__;
cdm_->RemoveSession(
session_id, std::make_unique<SimpleMojoCdmPromise>(std::move(callback)));
}
scoped_refptr<ContentDecryptionModule> MojoCdmService::GetCdm() {
return cdm_;
}
void MojoCdmService::OnCdmCreated(
InitializeCB init_cb,
const scoped_refptr<::media::ContentDecryptionModule>& cdm,
const std::string& error_message) {
// TODO(xhwang): This should not happen when KeySystemInfo is properly
// populated. See http://crbug.com/469366
if (!cdm) {
// Make sure the error string is non-empty on failure.
auto non_empty_error_message =
error_message.empty() ? "CDM creation failed" : error_message;
DVLOG(1) << __func__ << ": " << non_empty_error_message;
std::move(init_cb).Run(nullptr, non_empty_error_message);
return;
}
cdm_ = cdm;
cdm_id_ = context_->RegisterCdm(this);
DVLOG(1) << __func__ << ": CDM successfully registered with ID "
<< CdmContext::CdmIdToString(base::OptionalToPtr(cdm_id_));
auto mojo_cdm_context = mojom::CdmContext::New();
mojo_cdm_context->cdm_id = cdm_id();
CdmContext* const cdm_context = cdm_->GetCdmContext();
if (cdm_context) {
// If |cdm| has a decryptor, create the MojoDecryptorService
// and pass the connection back to the client.
if (cdm_context->GetDecryptor()) {
DVLOG(2) << __func__ << ": CDM supports Decryptor.";
mojo::PendingRemote<mojom::Decryptor> decryptor_remote;
// Both |cdm_| and |decryptor_| are owned by |this|, so we don't need to
// pass in a CdmContextRef.
decryptor_ = std::make_unique<MojoDecryptorService>(
cdm_context->GetDecryptor(), /*cdm_context_ref=*/nullptr);
decryptor_receiver_ = std::make_unique<mojo::Receiver<mojom::Decryptor>>(
decryptor_.get(), decryptor_remote.InitWithNewPipeAndPassReceiver());
// base::Unretained is safe because |decryptor_receiver_| is owned by
// |this|. If |this| is destructed, |decryptor_receiver_| will be
// destructed as well and the error handler should never be called.
// The disconnection can happen due to race conditions during render
// process teardown or crash.
decryptor_receiver_->set_disconnect_handler(base::BindOnce(
&MojoCdmService::OnDecryptorConnectionError, base::Unretained(this)));
mojo_cdm_context->decryptor = std::move(decryptor_remote);
}
#if BUILDFLAG(IS_WIN)
mojo_cdm_context->requires_media_foundation_renderer =
cdm_context->RequiresMediaFoundationRenderer();
#endif // BUILDFLAG(IS_WIN)
}
std::move(init_cb).Run(std::move(mojo_cdm_context), "");
}
void MojoCdmService::OnSessionMessage(const std::string& session_id,
::media::CdmMessageType message_type,
const std::vector<uint8_t>& message) {
DVLOG(2) << __func__;
if (client_) {
client_->OnSessionMessage(session_id, message_type, message);
}
}
void MojoCdmService::OnSessionKeysChange(const std::string& session_id,
bool has_additional_usable_key,
CdmKeysInfo keys_info) {
DVLOG(2) << __func__
<< " has_additional_usable_key = " << has_additional_usable_key;
if (client_) {
client_->OnSessionKeysChange(session_id, has_additional_usable_key,
std::move(keys_info));
}
}
void MojoCdmService::OnSessionExpirationUpdate(const std::string& session_id,
base::Time new_expiry_time_sec) {
DVLOG(2) << __func__ << " expiry = " << new_expiry_time_sec;
if (client_) {
client_->OnSessionExpirationUpdate(session_id,
new_expiry_time_sec.ToDoubleT());
}
}
void MojoCdmService::OnSessionClosed(const std::string& session_id,
CdmSessionClosedReason reason) {
DVLOG(2) << __func__;
if (client_) {
client_->OnSessionClosed(session_id, reason);
}
}
void MojoCdmService::OnDecryptorConnectionError() {
DVLOG(2) << __func__;
// MojoDecryptorService has lost connectivity to it's client, so it can be
// freed. This could happen due to render process teardown or crash. No need
// for recovery.
decryptor_.reset();
}
} // namespace media
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