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// 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 "components/cdm/renderer/android_key_systems.h"
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/logging.h"
#include "components/cdm/common/cdm_messages_android.h"
#include "components/cdm/renderer/widevine_key_systems.h"
#include "content/public/renderer/render_thread.h"
#include "media/base/eme_constants.h"
#include "media/base/media_switches.h"
#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
using media::EmeFeatureSupport;
using media::EmeRobustness;
using media::EmeSessionTypeSupport;
using media::KeySystemInfo;
using media::SupportedCodecs;
namespace cdm {
static SupportedKeySystemResponse QueryKeySystemSupport(
const std::string& key_system) {
SupportedKeySystemRequest request;
SupportedKeySystemResponse response;
request.key_system = key_system;
request.codecs = media::EME_CODEC_ALL;
content::RenderThread::Get()->Send(
new ChromeViewHostMsg_QueryKeySystemSupport(request, &response));
DCHECK(!(response.compositing_codecs & ~media::EME_CODEC_ALL))
<< "unrecognized codec";
DCHECK(!(response.non_compositing_codecs & ~media::EME_CODEC_ALL))
<< "unrecognized codec";
return response;
}
void AddAndroidWidevine(std::vector<KeySystemInfo>* concrete_key_systems) {
SupportedKeySystemResponse response = QueryKeySystemSupport(
kWidevineKeySystem);
// Since we do not control the implementation of the MediaDrm API on Android,
// we assume that it can and will make use of persistence even though no
// persistence-based features are supported.
if (response.compositing_codecs != media::EME_CODEC_NONE) {
AddWidevineWithCodecs(
WIDEVINE,
response.compositing_codecs, // Regular codecs.
response.non_compositing_codecs, // Hardware-secure codecs.
EmeRobustness::HW_SECURE_CRYPTO, // Max audio robustness.
EmeRobustness::HW_SECURE_ALL, // Max video robustness.
EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-license.
EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-release-message.
EmeFeatureSupport::ALWAYS_ENABLED, // Persistent state.
EmeFeatureSupport::ALWAYS_ENABLED, // Distinctive identifier.
concrete_key_systems);
} else {
// It doesn't make sense to support secure codecs but not regular codecs.
DCHECK(response.non_compositing_codecs == media::EME_CODEC_NONE);
}
// For compatibility with the prefixed API, register a separate L1 key system.
// This key systems acts as though only hardware-secure codecs are available.
// We only register support for codecs with both regular and hardware-secure
// variants so that we can be sure they will work regardless of the renderer
// preference.
SupportedCodecs secure_codecs =
response.compositing_codecs & response.non_compositing_codecs;
if (secure_codecs != media::EME_CODEC_NONE) {
// Note: The prefixed API only consults the regular codecs field.
AddWidevineWithCodecs(
WIDEVINE_HR_NON_COMPOSITING,
secure_codecs, // Regular codecs.
media::EME_CODEC_NONE, // Hardware-secure codecs.
EmeRobustness::HW_SECURE_CRYPTO, // Max audio robustness.
EmeRobustness::HW_SECURE_ALL, // Max video robustness.
EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-license.
EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-release-message.
EmeFeatureSupport::ALWAYS_ENABLED, // Persistent state.
EmeFeatureSupport::ALWAYS_ENABLED, // Distinctive identifier.
concrete_key_systems);
}
}
void AddAndroidPlatformKeySystems(
std::vector<KeySystemInfo>* concrete_key_systems) {
std::vector<std::string> key_system_names;
content::RenderThread::Get()->Send(
new ChromeViewHostMsg_GetPlatformKeySystemNames(&key_system_names));
for (std::vector<std::string>::const_iterator it = key_system_names.begin();
it != key_system_names.end(); ++it) {
SupportedKeySystemResponse response = QueryKeySystemSupport(*it);
if (response.compositing_codecs != media::EME_CODEC_NONE) {
KeySystemInfo info;
info.key_system = *it;
info.supported_codecs = response.compositing_codecs;
// Here we assume that support for a container implies support for the
// associated initialization data type. KeySystems handles validating
// |init_data_type| x |container| pairings.
if (response.compositing_codecs & media::EME_CODEC_WEBM_ALL)
info.supported_init_data_types |= media::kInitDataTypeMaskWebM;
#if defined(USE_PROPRIETARY_CODECS)
if (response.compositing_codecs & media::EME_CODEC_MP4_ALL)
info.supported_init_data_types |= media::kInitDataTypeMaskCenc;
#endif // defined(USE_PROPRIETARY_CODECS)
info.max_audio_robustness = EmeRobustness::EMPTY;
info.max_video_robustness = EmeRobustness::EMPTY;
// Assume that platform key systems support no features but can and will
// make use of persistence and identifiers.
info.persistent_license_support =
media::EmeSessionTypeSupport::NOT_SUPPORTED;
info.persistent_release_message_support =
media::EmeSessionTypeSupport::NOT_SUPPORTED;
info.persistent_state_support = media::EmeFeatureSupport::ALWAYS_ENABLED;
info.distinctive_identifier_support =
media::EmeFeatureSupport::ALWAYS_ENABLED;
concrete_key_systems->push_back(info);
}
}
}
} // namespace cdm
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