1 /*--------------------------------------------------------------------------
2 Copyright (c) 2010-2012, Code Aurora Forum. All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are met:
6 * Redistributions of source code must retain the above copyright
7 notice, this list of conditions and the following disclaimer.
8 * Redistributions in binary form must reproduce the above copyright
9 notice, this list of conditions and the following disclaimer in the
10 documentation and/or other materials provided with the distribution.
11 * Neither the name of Code Aurora nor
12 the names of its contributors may be used to endorse or promote
13 products derived from this software without specific prior written
14 permission.
15
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 --------------------------------------------------------------------------*/
28
29 #include "DivXDrmDecrypt.h"
30 #include <dlfcn.h> // for dlopen/dlclose
31
32 //#define LOG_NDEBUG 0
33 #define LOG_TAG "DivXDrmDecrypt"
34 #ifdef _ANDROID_
35 #include <utils/Log.h>
36 #else
37 #include <stdio.h>
38 #define ALOGE(fmt, args...) fprintf(stderr, fmt, ##args)
39 #endif /* _ANDROID_ */
40
41 static const char* DIVX_DRM_SHIM_LIB = "libSHIMDivxDrm.so";
42
getDecryptHandle()43 void* getDecryptHandle() {
44 static void* decryptLib = NULL;
45 static bool decryptLibOpened = false;
46
47 if(decryptLibOpened) {
48 return decryptLib;
49 }
50
51 decryptLib = ::dlopen(DIVX_DRM_SHIM_LIB, RTLD_NOW);
52 decryptLibOpened = true;
53
54 if (decryptLib == NULL) {
55 ALOGE("Failed to open DIVX_DRM_SHIM_LIB \n");
56 }
57
58 return decryptLib;
59 }
60
DrmDecryptFactoryFunction()61 DivXDrmDecryptFactory DrmDecryptFactoryFunction() {
62 static DivXDrmDecryptFactory drmDecryptFactoryFunction = NULL;
63 static bool alreadyTriedToFindFactoryFunction = false;
64
65 if(alreadyTriedToFindFactoryFunction) {
66 return drmDecryptFactoryFunction;
67 }
68
69 void *pDecryptLib = getDecryptHandle();
70 if (pDecryptLib == NULL) {
71 return NULL;
72 }
73
74 drmDecryptFactoryFunction = (DivXDrmDecryptFactory) dlsym(pDecryptLib, MEDIA_CREATE_DIVX_DRM_DECRYPT);
75 alreadyTriedToFindFactoryFunction = true;
76
77 if(!drmDecryptFactoryFunction) {
78 ALOGE(" dlsym for DrmDecrypt factory function failed \n");
79 }
80
81 return drmDecryptFactoryFunction;
82 }
83
84
85
Create()86 DivXDrmDecrypt* DivXDrmDecrypt::Create() {
87 DivXDrmDecryptFactory drmCreateFunc = DrmDecryptFactoryFunction();
88 if( drmCreateFunc == NULL ) {
89 return NULL;
90 }
91
92 DivXDrmDecrypt* decrypt = drmCreateFunc();
93 if( decrypt == NULL ) {
94 ALOGE(" failed to instantiate DrmDecoder \n");
95 }
96 return decrypt;
97 }
98
99