// 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 "chromecast/common/cast_content_client.h"
#include <stdint.h>
#include <memory>
#include <string_view>
#include <utility>
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/native_library.h"
#include "base/path_service.h"
#include "base/task/sequenced_task_runner.h"
#include "build/build_config.h"
#include "chromecast/base/cast_constants.h"
#include "chromecast/base/cast_paths.h"
#include "chromecast/base/version.h"
#include "chromecast/chromecast_buildflags.h"
#include "components/cast/common/constants.h"
#include "content/public/common/cdm_info.h"
#include "media/base/media_switches.h"
#include "media/cdm/cdm_type.h"
#include "media/media_buildflags.h"
#include "mojo/public/cpp/bindings/binder_map.h"
#include "third_party/widevine/cdm/buildflags.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "url/url_util.h"
#if BUILDFLAG(IS_ANDROID)
#include <optional>
#include "chromecast/common/media/cast_media_drm_bridge_client.h"
#include "components/cdm/common/android_cdm_registration.h"
#endif
#if !BUILDFLAG(IS_FUCHSIA)
#include "base/no_destructor.h"
#include "components/services/heap_profiling/public/cpp/profiling_client.h" // nogncheck
#include "mojo/public/cpp/bindings/pending_receiver.h"
#endif
#if BUILDFLAG(ENABLE_LIBRARY_CDMS)
#include "media/cdm/cdm_paths.h" // nogncheck
#endif
#if BUILDFLAG(BUNDLE_WIDEVINE_CDM) && BUILDFLAG(IS_LINUX)
#include "base/no_destructor.h"
#include "components/cdm/common/cdm_manifest.h"
#include "media/base/cdm_capability.h"
#include "third_party/widevine/cdm/widevine_cdm_common.h" // nogncheck
// component updated CDM on all desktop platforms and remove this.
// This file is In SHARED_INTERMEDIATE_DIR.
#include "widevine_cdm_version.h" // nogncheck
#endif
namespace chromecast {
namespace shell {
namespace {
#if BUILDFLAG(BUNDLE_WIDEVINE_CDM) && BUILDFLAG(IS_LINUX)
// Copied from chrome_content_client.cc
std::unique_ptr<content::CdmInfo> CreateWidevineCdmInfo(
const base::Version& version,
const base::FilePath& cdm_library_path,
media::CdmCapability capability) {
return std::make_unique<content::CdmInfo>(
kWidevineKeySystem, content::CdmInfo::Robustness::kSoftwareSecure,
std::move(capability), /*supports_sub_key_systems=*/false,
kWidevineCdmDisplayName, kWidevineCdmType, version, cdm_library_path);
}
// On desktop Linux, given |cdm_base_path| that points to a folder containing
// the Widevine CDM and associated files, read the manifest included in that
// directory and create a CdmInfo. If that is successful, return the CdmInfo. If
// not, return nullptr.
// Copied from chrome_content_client.cc
// TODO(crbug.com/40746872): move the functions to a common file.
std::unique_ptr<content::CdmInfo> CreateCdmInfoFromWidevineDirectory(
const base::FilePath& cdm_base_path) {
// Library should be inside a platform specific directory.
auto cdm_library_path =
media::GetPlatformSpecificDirectory(cdm_base_path)
.Append(base::GetNativeLibraryName(kWidevineCdmLibraryName));
if (!base::PathExists(cdm_library_path)) {
LOG(ERROR) << "cdm library path doesn't exist";
return nullptr;
}
// Manifest should be at the top level.
auto manifest_path = cdm_base_path.Append(FILE_PATH_LITERAL("manifest.json"));
base::Version version;
media::CdmCapability capability;
if (!ParseCdmManifestFromPath(manifest_path, &version, &capability))
return nullptr;
return CreateWidevineCdmInfo(version, cdm_library_path,
std::move(capability));
}
// This code checks to see if the Widevine CDM was bundled with Chrome. If one
// can be found and looks valid, it returns the CdmInfo for the CDM. Otherwise
// it returns nullptr.
// Copied from chrome_content_client.cc
content::CdmInfo* GetBundledWidevine() {
// We only want to do this on the first call, as if Widevine wasn't bundled
// with Chrome (or it was deleted/removed) it won't be loaded into the zygote.
static base::NoDestructor<std::unique_ptr<content::CdmInfo>> s_cdm_info(
[]() -> std::unique_ptr<content::CdmInfo> {
base::FilePath install_dir;
CHECK(base::PathService::Get(chromecast::DIR_BUNDLED_WIDEVINE_CDM,
&install_dir));
// On desktop Linux the MANIFEST is bundled with the CDM.
return CreateCdmInfoFromWidevineDirectory(install_dir);
}());
return s_cdm_info->get();
}
#endif // BUILDFLAG(BUNDLE_WIDEVINE_CDM) && BUILDFLAG(IS_LINUX)
} // namespace
CastContentClient::~CastContentClient() {
}
void CastContentClient::SetActiveURL(const GURL& url, std::string top_origin) {
if (url.is_empty() || url == last_active_url_)
return;
LOG(INFO) << "Active URL: " << url.possibly_invalid_spec() << " for origin '"
<< top_origin << "'";
last_active_url_ = url;
}
void CastContentClient::AddAdditionalSchemes(Schemes* schemes) {
schemes->standard_schemes.push_back(kChromeResourceScheme);
}
std::u16string CastContentClient::GetLocalizedString(int message_id) {
return l10n_util::GetStringUTF16(message_id);
}
std::string_view CastContentClient::GetDataResource(
int resource_id,
ui::ResourceScaleFactor scale_factor) {
return ui::ResourceBundle::GetSharedInstance().GetRawDataResourceForScale(
resource_id, scale_factor);
}
base::RefCountedMemory* CastContentClient::GetDataResourceBytes(
int resource_id) {
// Chromecast loads localized resources for the home screen via this code
// path. See crbug.com/643886 for details.
return ui::ResourceBundle::GetSharedInstance().LoadLocalizedResourceBytes(
resource_id);
}
std::string CastContentClient::GetDataResourceString(int resource_id) {
return ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(
resource_id);
}
gfx::Image& CastContentClient::GetNativeImageNamed(int resource_id) {
return ui::ResourceBundle::GetSharedInstance().GetNativeImageNamed(
resource_id);
}
#if BUILDFLAG(IS_ANDROID)
::media::MediaDrmBridgeClient* CastContentClient::GetMediaDrmBridgeClient() {
return new media::CastMediaDrmBridgeClient();
}
#endif // BUILDFLAG(IS_ANDROID)
void CastContentClient::ExposeInterfacesToBrowser(
scoped_refptr<base::SequencedTaskRunner> io_task_runner,
mojo::BinderMap* binders) {
#if !BUILDFLAG(IS_FUCHSIA)
binders->Add<heap_profiling::mojom::ProfilingClient>(
base::BindRepeating(
[](mojo::PendingReceiver<heap_profiling::mojom::ProfilingClient>
receiver) {
static base::NoDestructor<heap_profiling::ProfilingClient>
profiling_client;
profiling_client->BindToInterface(std::move(receiver));
}),
io_task_runner);
#endif // !BUILDFLAG(IS_FUCHSIA)
}
void CastContentClient::AddContentDecryptionModules(
std::vector<content::CdmInfo>* cdms,
std::vector<::media::CdmHostFilePath>* cdm_host_file_paths) {
if (cdms) {
#if BUILDFLAG(BUNDLE_WIDEVINE_CDM) && BUILDFLAG(IS_LINUX)
// The Widevine CDM on Linux needs to be registered (and loaded) before the
// zygote is locked down. The CDM can be found from the version bundled with
// Chrome (if BUNDLE_WIDEVINE_CDM = true).
content::CdmInfo* bundled_widevine = GetBundledWidevine();
if (bundled_widevine) {
DVLOG(1) << "Registering bundled Widevine " << bundled_widevine->version;
cdms->push_back(*bundled_widevine);
} else {
DVLOG(1) << "Widevine enabled but no library found";
}
#elif BUILDFLAG(IS_ANDROID)
#if BUILDFLAG(ENABLE_WIDEVINE)
cdm::AddAndroidWidevineCdm(cdms);
#endif // BUILDFLAG(ENABLE_WIDEVINE)
#if BUILDFLAG(ENABLE_PLAYREADY)
// PlayReady may be supported on the devices. Register it anyway without
// any capabilities so that it will be checked the first time it is used.
// CdmInfo needs a CdmType, but on Android it is not used as the key system
// is supported by MediaDrm. Using a random value as something needs to be
// specified, and it must be different than other CdmTypes specified.
// (On Android the key system is identified by UUID, and that mapping is
// maintained by MediaDrmBridge.)
const ::media::CdmType kPlayReadyCdmType{0x86eb6b54497627b0ull,
0xdd48f67486daf152ull};
// TODO(jrummell): Move kChromecastPlayreadyKeySystem from
// chromecast/media/base/key_systems_common.h to someplace more accessible.
const char kChromecastPlayreadyKeySystem[] = "com.chromecast.playready";
cdms->push_back(
content::CdmInfo(kChromecastPlayreadyKeySystem,
content::CdmInfo::Robustness::kSoftwareSecure,
std::nullopt, kPlayReadyCdmType));
cdms->push_back(
content::CdmInfo(kChromecastPlayreadyKeySystem,
content::CdmInfo::Robustness::kHardwareSecure,
std::nullopt, kPlayReadyCdmType));
#endif // BUILDFLAG(ENABLE_PLAYREADY)
#endif // BUILDFLAG(BUNDLE_WIDEVINE_CDM) && BUILDFLAG(IS_LINUX)
}
}
} // namespace shell
} // namespace chromecast
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