blob: 37f181e63f73548eb8c8593a46cfbb5be08d640a [file] [log] [blame]
// Copyright 2014 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 "chromecast/media/cdm/cast_cdm.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "chromecast/media/base/decrypt_context_impl.h"
#include "chromecast/media/base/media_caps.h"
#include "chromecast/media/common/media_resource_tracker.h"
#include "media/base/cdm_key_information.h"
#include "media/base/cdm_promise.h"
#include "media/base/decryptor.h"
#include "url/gurl.h"
namespace chromecast {
namespace media {
namespace {
using KeyStatus = ::media::CdmKeyInformation::KeyStatus;
constexpr size_t kKeyStatusCount =
static_cast<size_t>(KeyStatus::KEY_STATUS_MAX) + 1;
class CastCdmContextImpl : public CastCdmContext {
public:
explicit CastCdmContextImpl(CastCdm* cast_cdm) : cast_cdm_(cast_cdm) {
DCHECK(cast_cdm_);
}
~CastCdmContextImpl() override = default;
std::unique_ptr<::media::CallbackRegistration> RegisterEventCB(
EventCB event_cb) override {
return cast_cdm_->RegisterEventCB(std::move(event_cb));
}
std::unique_ptr<DecryptContextImpl> GetDecryptContext(
const std::string& key_id,
EncryptionScheme encryption_scheme) override {
return cast_cdm_->GetDecryptContext(key_id, encryption_scheme);
}
void SetKeyStatus(const std::string& key_id,
CastKeyStatus key_status,
uint32_t system_code) override {
cast_cdm_->SetKeyStatus(key_id, key_status, system_code);
}
void SetVideoResolution(int width, int height) override {
cast_cdm_->SetVideoResolution(width, height);
}
private:
// The CastCdm object which owns |this|.
CastCdm* const cast_cdm_;
DISALLOW_COPY_AND_ASSIGN(CastCdmContextImpl);
};
// Returns the HDCP version multiplied by ten.
int HdcpVersionX10(::media::HdcpVersion hdcp_version) {
switch (hdcp_version) {
case ::media::HdcpVersion::kHdcpVersionNone:
return 0;
case ::media::HdcpVersion::kHdcpVersion1_0:
return 10;
case ::media::HdcpVersion::kHdcpVersion1_1:
return 11;
case ::media::HdcpVersion::kHdcpVersion1_2:
return 12;
case ::media::HdcpVersion::kHdcpVersion1_3:
return 13;
case ::media::HdcpVersion::kHdcpVersion1_4:
return 14;
case ::media::HdcpVersion::kHdcpVersion2_0:
return 20;
case ::media::HdcpVersion::kHdcpVersion2_1:
return 21;
case ::media::HdcpVersion::kHdcpVersion2_2:
return 22;
case ::media::HdcpVersion::kHdcpVersion2_3:
return 23;
default:
NOTREACHED();
return 0;
}
}
} // namespace
CastCdm::CastCdm(MediaResourceTracker* media_resource_tracker)
: media_resource_tracker_(media_resource_tracker),
cast_cdm_context_(new CastCdmContextImpl(this)) {
thread_checker_.DetachFromThread();
}
CastCdm::~CastCdm() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void CastCdm::Initialize(
const ::media::SessionMessageCB& session_message_cb,
const ::media::SessionClosedCB& session_closed_cb,
const ::media::SessionKeysChangeCB& session_keys_change_cb,
const ::media::SessionExpirationUpdateCB& session_expiration_update_cb) {
DCHECK(thread_checker_.CalledOnValidThread());
if (media_resource_tracker_) {
media_resource_usage_ = std::make_unique<MediaResourceTracker::ScopedUsage>(
media_resource_tracker_);
}
session_message_cb_ = session_message_cb;
session_closed_cb_ = session_closed_cb;
session_keys_change_cb_ = session_keys_change_cb;
session_expiration_update_cb_ = session_expiration_update_cb;
InitializeInternal();
}
std::unique_ptr<::media::CallbackRegistration> CastCdm::RegisterEventCB(
::media::CdmContext::EventCB event_cb) {
return event_callbacks_.Register(std::move(event_cb));
}
::media::CdmContext* CastCdm::GetCdmContext() {
return cast_cdm_context_.get();
}
void CastCdm::GetStatusForPolicy(
::media::HdcpVersion min_hdcp_version,
std::unique_ptr<::media::KeyStatusCdmPromise> promise) {
int min_hdcp_x10 = HdcpVersionX10(min_hdcp_version);
int cur_hdcp_x10 = MediaCapabilities::GetHdcpVersion();
promise->resolve(cur_hdcp_x10 >= min_hdcp_x10 ? KeyStatus::USABLE
: KeyStatus::OUTPUT_RESTRICTED);
}
void CastCdm::OnSessionMessage(const std::string& session_id,
const std::vector<uint8_t>& message,
::media::CdmMessageType message_type) {
session_message_cb_.Run(session_id, message_type, message);
}
void CastCdm::OnSessionClosed(const std::string& session_id,
::media::CdmSessionClosedReason reason) {
session_closed_cb_.Run(session_id, reason);
}
void CastCdm::OnSessionKeysChange(const std::string& session_id,
bool newly_usable_keys,
::media::CdmKeysInfo keys_info) {
logging::LogMessage log_message(__FILE__, __LINE__, logging::LOG_INFO);
log_message.stream() << "keystatuseschange ";
int status_count[kKeyStatusCount] = {0};
for (const auto& key_info : keys_info) {
status_count[key_info->status]++;
}
for (int i = 0; i != ::media::CdmKeyInformation::KEY_STATUS_MAX; ++i) {
if (status_count[i] == 0)
continue;
log_message.stream() << status_count[i] << " " << static_cast<KeyStatus>(i)
<< " ";
}
session_keys_change_cb_.Run(session_id, newly_usable_keys,
std::move(keys_info));
if (newly_usable_keys) {
event_callbacks_.Notify(
::media::CdmContext::Event::kHasAdditionalUsableKey);
}
}
void CastCdm::OnSessionExpirationUpdate(const std::string& session_id,
base::Time new_expiry_time) {
session_expiration_update_cb_.Run(session_id, new_expiry_time);
}
void CastCdm::KeyIdAndKeyPairsToInfo(const ::media::KeyIdAndKeyPairs& keys,
::media::CdmKeysInfo* keys_info) {
DCHECK(keys_info);
for (const std::pair<std::string, std::string>& key : keys) {
keys_info->push_back(std::make_unique<::media::CdmKeyInformation>(
key.first, ::media::CdmKeyInformation::USABLE, 0));
}
}
// A default empty implementation for subclasses that don't need to provide
// any key system specific initialization.
void CastCdm::InitializeInternal() {}
} // namespace media
} // namespace chromecast