1 /*
2 * Copyright (C) 2011 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 #include <dlfcn.h>
18
19 #include "base/logging.h"
20 #include "core/native_frame.h"
21 #include "core/native_program.h"
22
23 #include <string>
24 #include <vector>
25
26 namespace android {
27 namespace filterfw {
28
NativeProgram()29 NativeProgram::NativeProgram()
30 : lib_handle_(NULL),
31 init_function_(NULL),
32 setvalue_function_(NULL),
33 getvalue_function_(NULL),
34 process_function_(NULL),
35 reset_function_(NULL),
36 teardown_function_(NULL),
37 user_data_(NULL) {
38 }
39
~NativeProgram()40 NativeProgram::~NativeProgram() {
41 if (lib_handle_)
42 dlclose(lib_handle_);
43 }
44
OpenLibrary(const std::string & lib_name)45 bool NativeProgram::OpenLibrary(const std::string& lib_name) {
46 if (!lib_handle_) {
47 lib_handle_ = dlopen(lib_name.c_str(), RTLD_NOW);
48 if (!lib_handle_) {
49 ALOGE("NativeProgram: Error opening library: '%s': %s", lib_name.c_str(), dlerror());
50 return false;
51 }
52 return true;
53 }
54 return false;
55 }
56
BindProcessFunction(const std::string & func_name)57 bool NativeProgram::BindProcessFunction(const std::string& func_name) {
58 if (!lib_handle_)
59 return false;
60 process_function_ = reinterpret_cast<ProcessFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
61 if (!process_function_) {
62 ALOGE("NativeProgram: Could not find process function symbol: '%s'!", func_name.c_str());
63 return false;
64 }
65 return true;
66 }
67
BindInitFunction(const std::string & func_name)68 bool NativeProgram::BindInitFunction(const std::string& func_name) {
69 if (!lib_handle_)
70 return false;
71 init_function_ = reinterpret_cast<InitFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
72 return init_function_ != NULL;
73 }
74
BindSetValueFunction(const std::string & func_name)75 bool NativeProgram::BindSetValueFunction(const std::string& func_name) {
76 if (!lib_handle_)
77 return false;
78 setvalue_function_ = reinterpret_cast<SetValueFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
79 return setvalue_function_ != NULL;
80 }
81
BindGetValueFunction(const std::string & func_name)82 bool NativeProgram::BindGetValueFunction(const std::string& func_name) {
83 if (!lib_handle_)
84 return false;
85 getvalue_function_ = reinterpret_cast<GetValueFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
86 return getvalue_function_ != NULL;
87 }
88
BindResetFunction(const std::string & func_name)89 bool NativeProgram::BindResetFunction(const std::string& func_name) {
90 if (!lib_handle_)
91 return false;
92 reset_function_ = reinterpret_cast<ResetFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
93 return reset_function_ != NULL;
94 }
95
BindTeardownFunction(const std::string & func_name)96 bool NativeProgram::BindTeardownFunction(const std::string& func_name) {
97 if (!lib_handle_)
98 return false;
99 teardown_function_ = reinterpret_cast<TeardownFunctionPtr>(dlsym(lib_handle_, func_name.c_str()));
100 return teardown_function_ != NULL;
101 }
102
CallProcess(const std::vector<const char * > & inputs,const std::vector<int> & input_sizes,char * output,int output_size)103 bool NativeProgram::CallProcess(const std::vector<const char*>& inputs,
104 const std::vector<int>& input_sizes,
105 char* output,
106 int output_size) {
107 if (process_function_) {
108 return process_function_(const_cast<const char**>(&inputs[0]),
109 &input_sizes[0],
110 inputs.size(),
111 output,
112 output_size,
113 user_data_) == 1;
114 }
115 return false;
116 }
117
CallInit()118 bool NativeProgram::CallInit() {
119 if (init_function_) {
120 init_function_(&user_data_);
121 return true;
122 }
123 return false;
124 }
125
CallSetValue(const std::string & key,const std::string & value)126 bool NativeProgram::CallSetValue(const std::string& key, const std::string& value) {
127 if (setvalue_function_) {
128 setvalue_function_(key.c_str(), value.c_str(), user_data_);
129 return true;
130 }
131 return false;
132 }
133
CallGetValue(const std::string & key)134 std::string NativeProgram::CallGetValue(const std::string& key) {
135 if (getvalue_function_) {
136 static const int buffer_size = 1024;
137 char result[buffer_size];
138 result[buffer_size - 1] = '\0';
139 getvalue_function_(key.c_str(), result, buffer_size, user_data_);
140 return std::string(result);
141 }
142 return std::string();
143 }
144
CallReset()145 bool NativeProgram::CallReset() {
146 if (reset_function_) {
147 reset_function_(user_data_);
148 return true;
149 }
150 return false;
151 }
152
CallTeardown()153 bool NativeProgram::CallTeardown() {
154 if (teardown_function_) {
155 teardown_function_(user_data_);
156 return true;
157 }
158 return false;
159 }
160
161 } // namespace filterfw
162 } // namespace android
163