1 /*
2 * Copyright 2018, 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 //#define LOG_NDEBUG 0
18 #define LOG_TAG "StagefrightPluginLoader"
19 #include <utils/Log.h>
20
21 #include <android-base/properties.h>
22 #include <dlfcn.h>
23
24 #include "StagefrightPluginLoader.h"
25
26 namespace android {
27
28 /* static */ Mutex StagefrightPluginLoader::sMutex;
29 /* static */ std::unique_ptr<StagefrightPluginLoader> StagefrightPluginLoader::sInstance;
30
31 namespace /* unnamed */ {
32
33 constexpr const char kCCodecPluginPath[] = "libsfplugin_ccodec.so";
34
35 } // unnamed namespace
36
StagefrightPluginLoader(const char * libPath)37 StagefrightPluginLoader::StagefrightPluginLoader(const char *libPath) {
38 if (android::base::GetIntProperty("debug.stagefright.ccodec", 1) == 0) {
39 ALOGD("CCodec is disabled.");
40 return;
41 }
42 mLibHandle = dlopen(libPath, RTLD_NOW | RTLD_NODELETE);
43 if (mLibHandle == nullptr) {
44 ALOGD("Failed to load library: %s (%s)", libPath, dlerror());
45 return;
46 }
47 mCreateCodec = (CodecBase::CreateCodecFunc)dlsym(mLibHandle, "CreateCodec");
48 if (mCreateCodec == nullptr) {
49 ALOGD("Failed to find symbol: CreateCodec (%s)", dlerror());
50 }
51 mCreateBuilder = (MediaCodecListBuilderBase::CreateBuilderFunc)dlsym(
52 mLibHandle, "CreateBuilder");
53 if (mCreateBuilder == nullptr) {
54 ALOGD("Failed to find symbol: CreateBuilder (%s)", dlerror());
55 }
56 mCreateInputSurface = (CodecBase::CreateInputSurfaceFunc)dlsym(
57 mLibHandle, "CreateInputSurface");
58 if (mCreateInputSurface == nullptr) {
59 ALOGD("Failed to find symbol: CreateInputSurface (%s)", dlerror());
60 }
61 }
62
~StagefrightPluginLoader()63 StagefrightPluginLoader::~StagefrightPluginLoader() {
64 if (mLibHandle != nullptr) {
65 ALOGV("Closing handle");
66 dlclose(mLibHandle);
67 }
68 }
69
createCodec()70 CodecBase *StagefrightPluginLoader::createCodec() {
71 if (mLibHandle == nullptr || mCreateCodec == nullptr) {
72 ALOGD("Handle or CreateCodec symbol is null");
73 return nullptr;
74 }
75 return mCreateCodec();
76 }
77
createBuilder()78 MediaCodecListBuilderBase *StagefrightPluginLoader::createBuilder() {
79 if (mLibHandle == nullptr || mCreateBuilder == nullptr) {
80 ALOGD("Handle or CreateBuilder symbol is null");
81 return nullptr;
82 }
83 return mCreateBuilder();
84 }
85
createInputSurface()86 PersistentSurface *StagefrightPluginLoader::createInputSurface() {
87 if (mLibHandle == nullptr || mCreateInputSurface == nullptr) {
88 ALOGD("Handle or CreateInputSurface symbol is null");
89 return nullptr;
90 }
91 return mCreateInputSurface();
92 }
93
94 //static
GetCCodecInstance()95 const std::unique_ptr<StagefrightPluginLoader> &StagefrightPluginLoader::GetCCodecInstance() {
96 Mutex::Autolock _l(sMutex);
97 if (!sInstance) {
98 ALOGV("Loading library");
99 sInstance.reset(new StagefrightPluginLoader(kCCodecPluginPath));
100 }
101 return sInstance;
102 }
103
104 } // namespace android
105