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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/media/key_system_support_win.h"
#include "base/logging.h"
#include "base/types/expected.h"
#include "content/browser/media/service_factory.h"
#include "media/base/cdm_capability.h"
#include "media/base/key_system_capability.h"
#include "media/cdm/win/media_foundation_cdm.h"
#include "media/mojo/mojom/key_system_support.mojom.h"
#include "media/mojo/mojom/media_foundation_service.mojom.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "url/gurl.h"
namespace content {
namespace {
template <typename T>
base::flat_set<T> VectorToSet(const std::vector<T>& v) {
return base::flat_set<T>(v.begin(), v.end());
}
void OnKeySystemCapability(
bool is_hw_secure,
media::CdmCapabilityCB cdm_capability_cb,
bool is_supported,
const media::KeySystemCapability& key_system_capability) {
DVLOG(1) << __func__ << ": is_hw_secure=" << is_hw_secure;
const media::CdmCapabilityOrStatus& cdm_capability_or_status =
is_hw_secure ? key_system_capability.hw_cdm_capability_or_status
: key_system_capability.sw_cdm_capability_or_status;
// Key system must support at least 1 video codec, 1 encryption scheme,
// and 1 encryption scheme to be considered. Support for audio codecs is
// optional.
if (!is_supported || !cdm_capability_or_status.has_value()) {
std::move(cdm_capability_cb).Run(cdm_capability_or_status);
return;
}
std::optional<media::CdmCapability> capability =
cdm_capability_or_status.value();
if (!capability || capability->video_codecs.empty() ||
capability->encryption_schemes.empty() ||
capability->session_types.empty()) {
std::move(cdm_capability_cb)
.Run(base::unexpected(
media::CdmCapabilityQueryStatus::kUnexpectedEmptyCapability));
return;
}
std::move(cdm_capability_cb).Run(capability.value());
}
} // namespace
void GetMediaFoundationServiceCdmCapability(
const std::string& key_system,
const media::CdmType& cdm_type,
const base::FilePath& cdm_path,
bool is_hw_secure,
media::CdmCapabilityCB cdm_capability_cb) {
DVLOG(3) << __func__ << ": key_system=" << key_system
<< ", is_hw_secure=" << is_hw_secure;
if (!media::MediaFoundationCdm::IsAvailable()) {
DVLOG(1) << "MediaFoundationCdm not available!";
std::move(cdm_capability_cb)
.Run(base::unexpected(
media::CdmCapabilityQueryStatus::kMediaFoundationCdmNotSupported));
return;
}
// CDM capability is global, use a generic BrowserContext and Site to query.
auto& mf_service =
GetMediaFoundationService(cdm_type, nullptr, GURL(), cdm_path);
mf_service.IsKeySystemSupported(
key_system,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
base::BindOnce(&OnKeySystemCapability, is_hw_secure,
std::move(cdm_capability_cb)),
false,
media::KeySystemCapability(
base::unexpected(
media::CdmCapabilityQueryStatus::kDisconnectionError),
base::unexpected(
media::CdmCapabilityQueryStatus::kDisconnectionError))));
}
} // namespace content
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