1
2 /*
3 * Copyright (C) 2017 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 //#define LOG_NDEBUG 0
18 #define LOG_TAG "DescramblerImpl"
19
20 #include <media/cas/DescramblerAPI.h>
21 #include <media/DescramblerImpl.h>
22 #include <media/SharedLibrary.h>
23 #include <utils/Log.h>
24 #include <binder/IMemory.h>
25
26 namespace android {
27
getBinderStatus(status_t err)28 static Status getBinderStatus(status_t err) {
29 if (err == OK) {
30 return Status::ok();
31 }
32 if (err == BAD_VALUE) {
33 return Status::fromExceptionCode(Status::EX_ILLEGAL_ARGUMENT);
34 }
35 if (err == INVALID_OPERATION) {
36 return Status::fromExceptionCode(Status::EX_ILLEGAL_STATE);
37 }
38 return Status::fromServiceSpecificError(err);
39 }
40
sessionIdToString(const CasSessionId & sessionId)41 static String8 sessionIdToString(const CasSessionId &sessionId) {
42 String8 result;
43 for (size_t i = 0; i < sessionId.size(); i++) {
44 result.appendFormat("%02x ", sessionId[i]);
45 }
46 if (result.isEmpty()) {
47 result.append("(null)");
48 }
49 return result;
50 }
51
DescramblerImpl(const sp<SharedLibrary> & library,DescramblerPlugin * plugin)52 DescramblerImpl::DescramblerImpl(
53 const sp<SharedLibrary>& library, DescramblerPlugin *plugin) :
54 mLibrary(library), mPlugin(plugin) {
55 ALOGV("CTOR: mPlugin=%p", mPlugin);
56 }
57
~DescramblerImpl()58 DescramblerImpl::~DescramblerImpl() {
59 ALOGV("DTOR: mPlugin=%p", mPlugin);
60 release();
61 }
62
setMediaCasSession(const CasSessionId & sessionId)63 Status DescramblerImpl::setMediaCasSession(const CasSessionId& sessionId) {
64 ALOGV("setMediaCasSession: sessionId=%s",
65 sessionIdToString(sessionId).string());
66
67 return getBinderStatus(mPlugin->setMediaCasSession(sessionId));
68 }
69
requiresSecureDecoderComponent(const String16 & mime,bool * result)70 Status DescramblerImpl::requiresSecureDecoderComponent(
71 const String16& mime, bool *result) {
72 *result = mPlugin->requiresSecureDecoderComponent(String8(mime));
73
74 return getBinderStatus(OK);
75 }
76
descramble(const DescrambleInfo & info,int32_t * result)77 Status DescramblerImpl::descramble(
78 const DescrambleInfo& info, int32_t *result) {
79 ALOGV("descramble");
80
81 *result = mPlugin->descramble(
82 info.dstType != DescrambleInfo::kDestinationTypeVmPointer,
83 info.scramblingControl,
84 info.numSubSamples,
85 info.subSamples,
86 info.srcMem->pointer(),
87 info.srcOffset,
88 info.dstType == DescrambleInfo::kDestinationTypeVmPointer ?
89 info.srcMem->pointer() : info.dstPtr,
90 info.dstOffset,
91 NULL);
92
93 return getBinderStatus(*result >= 0 ? OK : *result);
94 }
95
release()96 Status DescramblerImpl::release() {
97 ALOGV("release: mPlugin=%p", mPlugin);
98
99 if (mPlugin != NULL) {
100 delete mPlugin;
101 mPlugin = NULL;
102 }
103 return Status::ok();
104 }
105
106 } // namespace android
107
108