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