1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef NUPLAYER_DRM_H_ 18 #define NUPLAYER_DRM_H_ 19 20 #include <binder/Parcel.h> 21 #include <media/ICrypto.h> 22 #include <media/IDrm.h> 23 #include <media/stagefright/MetaData.h> // for CryptInfo 24 25 26 namespace android { 27 28 struct DrmUUID { 29 static const int UUID_SIZE = 16; 30 DrmUUIDDrmUUID31 DrmUUID() { 32 memset(this->uuid, 0, sizeof(uuid)); 33 } 34 35 // to allow defining Vector/KeyedVector of UUID type DrmUUIDDrmUUID36 DrmUUID(const DrmUUID &a) { 37 memcpy(this->uuid, a.uuid, sizeof(uuid)); 38 } 39 40 // to allow defining Vector/KeyedVector of UUID type DrmUUIDDrmUUID41 DrmUUID(const uint8_t uuid_in[UUID_SIZE]) { 42 memcpy(this->uuid, uuid_in, sizeof(uuid)); 43 } 44 ptrDrmUUID45 const uint8_t *ptr() const { 46 return uuid; 47 } 48 toHexStringDrmUUID49 String8 toHexString() const { 50 return arrayToHex(uuid, UUID_SIZE); 51 } 52 toHexStringDrmUUID53 static String8 toHexString(const uint8_t uuid_in[UUID_SIZE]) { 54 return arrayToHex(uuid_in, UUID_SIZE); 55 } 56 arrayToHexDrmUUID57 static String8 arrayToHex(const uint8_t *array, int bytes) { 58 String8 result; 59 for (int i = 0; i < bytes; i++) { 60 result.appendFormat("%02x", array[i]); 61 } 62 63 return result; 64 } 65 66 protected: 67 uint8_t uuid[UUID_SIZE]; 68 }; 69 70 71 struct NuPlayerDrm { 72 73 // static helpers - internal 74 75 protected: 76 static sp<IDrm> CreateDrm(status_t *pstatus); 77 static sp<ICrypto> createCrypto(status_t *pstatus); 78 static Vector<DrmUUID> parsePSSH(const void *pssh, size_t psshsize); 79 static Vector<DrmUUID> getSupportedDrmSchemes(const void *pssh, size_t psshsize); 80 81 // static helpers - public 82 83 public: 84 static sp<ICrypto> createCryptoAndPlugin(const uint8_t uuid[16], 85 const Vector<uint8_t> &drmSessionId, status_t &status); 86 // Parcel has only private copy constructor so passing it in rather than returning 87 static void retrieveDrmInfo(const void *pssh, size_t psshsize, Parcel *parcel); 88 89 //////////////////////////////////////////////////////////////////////////////////////////// 90 /// Helpers for NuPlayerDecoder 91 //////////////////////////////////////////////////////////////////////////////////////////// 92 93 static const uint8_t kBlockSize = 16; // AES_BLOCK_SIZE 94 95 struct CryptoInfo { 96 int numSubSamples; 97 uint8_t key[kBlockSize]; 98 uint8_t iv[kBlockSize]; 99 CryptoPlugin::Mode mode; 100 CryptoPlugin::Pattern pattern; 101 CryptoPlugin::SubSample *subSamples; 102 }; 103 104 static CryptoInfo *makeCryptoInfo( 105 int numSubSamples, 106 uint8_t key[kBlockSize], 107 uint8_t iv[kBlockSize], 108 CryptoPlugin::Mode mode, 109 size_t *clearbytes, 110 size_t *encryptedbytes); 111 112 static CryptoInfo *getSampleCryptoInfo(sp<MetaData> meta); 113 114 }; // NuPlayerDrm 115 116 } // android 117 118 #endif //NUPLAYER_DRM_H_ 119