drm/libmediadrm/interface/mediadrm/DrmUtils.h

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_DRMUTILS_H
#define ANDROID_DRMUTILS_H

#include <utils/Errors.h>  // for status_t
#include <utils/StrongPointer.h>
#include <binder/Parcel.h>

namespace android {

struct ICrypto;
struct IDrm;

namespace DrmUtils {

bool UseDrmService();

sp<IDrm> MakeDrm(status_t *pstatus = nullptr);

sp<ICrypto> MakeCrypto(status_t *pstatus = nullptr);

template<typename BA>
void WriteByteArray(Parcel &obj, const BA &vec) {
    obj.writeInt32(vec.size());
    if (vec.size()) {
        obj.write(vec.data(), vec.size());
    }
}

template<typename ET, typename BA>
void WriteEventToParcel(
        Parcel &obj,
        ET eventType,
        const BA &sessionId,
        const BA &data) {
    WriteByteArray(obj, sessionId);
    WriteByteArray(obj, data);
    obj.writeInt32(eventType);
}

template<typename BA>
void WriteExpirationUpdateToParcel(
        Parcel &obj,
        const BA &sessionId,
        int64_t expiryTimeInMS) {
    WriteByteArray(obj, sessionId);
    obj.writeInt64(expiryTimeInMS);
}

template<typename BA, typename KSL>
void WriteKeysChange(
        Parcel &obj,
        const BA &sessionId,
        const KSL &keyStatusList,
        bool hasNewUsableKey) {
    WriteByteArray(obj, sessionId);
    obj.writeInt32(keyStatusList.size());
    for (const auto &keyStatus : keyStatusList) {
        WriteByteArray(obj, keyStatus.keyId);
        obj.writeInt32(keyStatus.type);
    }
    obj.writeInt32(hasNewUsableKey);
}

} // namespace DrmUtils

} // namespace android

#endif // ANDROID_DRMUTILS_H