android -> plarforms/android

platforms/android/service/engine/jni/BinderComponent/BnOpenCVEngine.cpp

@@ -0,0 +1,72 @@
+#include "EngineCommon.h"
+#include "IOpenCVEngine.h"
+#include "BnOpenCVEngine.h"
+#include <utils/Log.h>
+#include <utils/String8.h>
+#include <utils/String16.h>
+
+using namespace android;
+
+BnOpenCVEngine::~BnOpenCVEngine()
+{
+}
+
+// Notes about data transaction:
+// Java Binder Wrapper call readInt32 before reading return data
+// It treet this in value as exception code
+// OnTransact method support this feature
+status_t BnOpenCVEngine::onTransact(uint32_t code, const Parcel& data, android::Parcel* reply, uint32_t flags)
+{
+    LOGD("OpenCVEngine::OnTransact(%u,%u)", code, flags);
+
+    switch(code)
+    {
+        case OCVE_GET_ENGINE_VERSION:
+        {
+            LOGD("OpenCVEngine OCVE_GET_ENGINE_VERSION request");
+            CHECK_INTERFACE(IOpenCVEngine, data, reply);
+            LOGD("OpenCVEngine::GetVersion()");
+            reply->writeInt32(0);
+            return reply->writeInt32(GetVersion());
+        } break;
+        case OCVE_GET_LIB_PATH_BY_VERSION:
+        {
+            LOGD("OpenCVEngine OCVE_GET_LIB_PATH_BY_VERSION request");
+            CHECK_INTERFACE(IOpenCVEngine, data, reply);
+            const String16 version = data.readString16();
+            LOGD("OpenCVEngine::GetLibPathByVersion(%s)", String8(version).string());
+            String16 path = GetLibPathByVersion(version);
+            reply->writeInt32(0);
+            return reply->writeString16(path);
+        } break;
+        case OCVE_GET_LIB_LIST:
+        {
+            LOGD("OpenCVEngine OCVE_GET_LIB_LIST request");
+            CHECK_INTERFACE(IOpenCVEngine, data, reply);
+            const String16 version = data.readString16();
+            LOGD("OpenCVEngine::GetLibraryList(%s)", String8(version).string());
+            String16 path = GetLibraryList(version);
+            reply->writeInt32(0);
+            return reply->writeString16(path);
+        } break;
+        case OCVE_INSTALL_VERSION:
+        {
+            LOGD("OpenCVEngine OCVE_INSTALL_VERSION request");
+            CHECK_INTERFACE(IOpenCVEngine, data, reply);
+            const String16 version = data.readString16();
+            LOGD("OpenCVEngine::InstallVersion(%s)", String8(version).string());
+            bool result = InstallVersion(version);
+            reply->writeInt32(0);
+            int res = reply->writeInt32(static_cast<int32_t>(result));
+            LOGD("InstallVersion call to Binder finished with res %d", res);
+            return res;
+        } break;
+        default:
+        {
+            LOGD("OpenCVEngine unknown request");
+            return BBinder::onTransact(code, data, reply, flags);
+        }
+    }
+
+    return android::NO_ERROR;
+}

platforms/android/service/engine/jni/BinderComponent/BnOpenCVEngine.h

@@ -0,0 +1,21 @@
+#ifndef __BP_OPENCV_ENGINE_H__
+#define __BP_OPENCV_ENGINE_H__
+
+#include "EngineCommon.h"
+#include "IOpenCVEngine.h"
+#include <binder/IInterface.h>
+#include <binder/Parcel.h>
+#include <utils/String16.h>
+
+class BnOpenCVEngine: public android::BnInterface<IOpenCVEngine>
+{
+public:
+    android::status_t onTransact(uint32_t code,
+                 const android::Parcel &data,
+                 android::Parcel *reply,
+                 uint32_t flags);
+    virtual ~BnOpenCVEngine();
+
+};
+
+#endif

platforms/android/service/engine/jni/BinderComponent/BpOpenCVEngine.cpp

@@ -0,0 +1,71 @@
+#include "IOpenCVEngine.h"
+#include "BpOpenCVEngine.h"
+
+using namespace android;
+
+BpOpenCVEngine::BpOpenCVEngine(const sp<IBinder>& impl):
+    BpInterface<IOpenCVEngine>(impl)
+{
+}
+
+BpOpenCVEngine::~BpOpenCVEngine()
+{
+}
+
+// Notes about data transaction:
+// Java Binder Wrapper call readInt32 before reading return data
+// It treet this in value as exception code
+// This implementation support this feature
+
+int BpOpenCVEngine::GetVersion()
+{
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IOpenCVEngine::descriptor);
+    remote()->transact(OCVE_GET_ENGINE_VERSION, data, &reply, 0);
+    // read exception code
+    reply.readInt32();
+
+    return reply.readInt32();
+}
+
+String16 BpOpenCVEngine::GetLibPathByVersion(String16 version)
+{
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IOpenCVEngine::descriptor);
+    data.writeString16(version);
+    remote()->transact(OCVE_GET_LIB_PATH_BY_VERSION, data, &reply, 0);
+    // read exception code
+    reply.readInt32();
+
+    return reply.readString16();
+}
+
+android::String16 BpOpenCVEngine::GetLibraryList(String16 version)
+{
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IOpenCVEngine::descriptor);
+    data.writeString16(version);
+    remote()->transact(OCVE_GET_LIB_LIST, data, &reply, 0);
+    // read exception code
+    reply.readInt32();
+
+    return reply.readString16();
+}
+
+bool BpOpenCVEngine::InstallVersion(String16 version)
+{
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IOpenCVEngine::descriptor);
+    data.writeString16(version);
+    remote()->transact(OCVE_INSTALL_VERSION, data, &reply, 0);
+    // read exception code
+    reply.readInt32();
+
+    return static_cast<bool>(reply.readInt32());
+}
+
+IMPLEMENT_META_INTERFACE(OpenCVEngine, OPECV_ENGINE_CLASSNAME)

platforms/android/service/engine/jni/BinderComponent/BpOpenCVEngine.h

@@ -0,0 +1,20 @@
+#ifndef __BP_OPENCV_ENGINE_H__
+#define __BP_OPENCV_ENGINE_H__
+
+#include "IOpenCVEngine.h"
+#include <binder/IInterface.h>
+#include <binder/Parcel.h>
+#include <utils/String16.h>
+
+class BpOpenCVEngine: public android::BpInterface<IOpenCVEngine>
+{
+public:
+    BpOpenCVEngine(const android::sp<android::IBinder>& impl);
+    virtual ~BpOpenCVEngine();
+    virtual int GetVersion();
+    virtual android::String16 GetLibPathByVersion(android::String16 version);
+    virtual android::String16 GetLibraryList(android::String16 version);
+    virtual bool InstallVersion(android::String16 version);
+};
+
+#endif

platforms/android/service/engine/jni/BinderComponent/HardwareDetector.cpp

@@ -0,0 +1,175 @@
+#include "HardwareDetector.h"
+#include "TegraDetector.h"
+#include "ProcReader.h"
+#include "EngineCommon.h"
+#include "StringUtils.h"
+#include <utils/Log.h>
+
+using namespace std;
+
+int GetCpuID()
+{
+    int result = 0;
+    map<string, string> cpu_info = GetCpuInfo();
+    map<string, string>::const_iterator it;
+
+    #if defined(__i386__)
+    LOGD("Using X86 HW detector");
+    result |= ARCH_X86;
+    it = cpu_info.find("flags");
+    if (cpu_info.end() != it)
+    {
+        set<string> features = SplitString(it->second, ' ');
+        if (features.end() != features.find(CPU_INFO_SSE_STR))
+        {
+            result |= FEATURES_HAS_SSE;
+        }
+        if (features.end() != features.find(CPU_INFO_SSE2_STR))
+        {
+            result |= FEATURES_HAS_SSE2;
+        }
+        if (features.end() != features.find(CPU_INFO_SSSE3_STR))
+        {
+            result |= FEATURES_HAS_SSSE3;
+        }
+    }
+#elif defined(__mips)
+#ifdef __SUPPORT_MIPS
+    result |= ARCH_MIPS;
+#else
+    result = ARCH_UNKNOWN;
+#endif
+#else
+    LOGD("Using ARM HW detector");
+    it = cpu_info.find("Processor");
+
+    if (cpu_info.end() != it)
+    {
+        size_t proc_name_pos = it->second.find(CPU_INFO_ARCH_X86_STR);
+        if (string::npos != proc_name_pos)
+        {
+        }
+        else
+        {
+            proc_name_pos = it->second.find(CPU_INFO_ARCH_ARMV7_STR);
+            if (string::npos != proc_name_pos)
+            {
+                result |= ARCH_ARMv7;
+            }
+            else
+            {
+                proc_name_pos = it->second.find(CPU_INFO_ARCH_ARMV6_STR);
+                if (string::npos != proc_name_pos)
+                {
+                    result |= ARCH_ARMv6;
+                }
+                else
+                {
+                    proc_name_pos = it->second.find(CPU_INFO_ARCH_ARMV5_STR);
+                    if (string::npos != proc_name_pos)
+                    {
+                        result |= ARCH_ARMv5;
+                    }
+                }
+            }
+        }
+    }
+    else
+    {
+        return ARCH_UNKNOWN;
+    }
+
+    it = cpu_info.find("Features");
+    if (cpu_info.end() != it)
+    {
+        set<string> features = SplitString(it->second, ' ');
+        if (features.end() != features.find(CPU_INFO_NEON_STR))
+        {
+            result |= FEATURES_HAS_NEON;
+        }
+        if (features.end() != features.find(CPU_INFO_NEON2_STR))
+        {
+            result |= FEATURES_HAS_NEON2;
+        }
+        if (features.end() != features.find(CPU_INFO_VFPV3_STR))
+        {
+            if (features.end () != features.find(CPU_INFO_VFPV3D16_STR))
+            {
+                result |= FEATURES_HAS_VFPv3d16;
+            }
+            else
+            {
+                result |= FEATURES_HAS_VFPv3;
+            }
+        }
+    }
+    #endif
+
+    return result;
+}
+
+string GetPlatformName()
+{
+    map<string, string> cpu_info = GetCpuInfo();
+    string hardware_name = "";
+    map<string, string>::const_iterator hw_iterator = cpu_info.find("Hardware");
+
+    if (cpu_info.end() != hw_iterator)
+    {
+        hardware_name = hw_iterator->second;
+    }
+
+    return hardware_name;
+}
+
+int GetProcessorCount()
+{
+    FILE* cpuPossible = fopen("/sys/devices/system/cpu/possible", "r");
+    if(!cpuPossible)
+        return 1;
+
+    char buf[2000]; //big enough for 1000 CPUs in worst possible configuration
+    char* pbuf = fgets(buf, sizeof(buf), cpuPossible);
+    fclose(cpuPossible);
+    if(!pbuf)
+        return 1;
+
+    //parse string of form "0-1,3,5-7,10,13-15"
+        int cpusAvailable = 0;
+
+        while(*pbuf)
+        {
+            const char* pos = pbuf;
+            bool range = false;
+            while(*pbuf && *pbuf != ',')
+            {
+                if(*pbuf == '-') range = true;
+                ++pbuf;
+            }
+            if(*pbuf) *pbuf++ = 0;
+            if(!range)
+                ++cpusAvailable;
+            else
+            {
+                int rstart = 0, rend = 0;
+                sscanf(pos, "%d-%d", &rstart, &rend);
+                cpusAvailable += rend - rstart + 1;
+            }
+        }
+        return cpusAvailable ? cpusAvailable : 1;
+}
+
+int DetectKnownPlatforms()
+{
+    int tegra_status = DetectTegra();
+
+    // All Tegra platforms since Tegra3
+    if (2 < tegra_status)
+    {
+        return PLATFORM_TEGRA + tegra_status - 1;
+    }
+    else
+    {
+        return PLATFORM_UNKNOWN;
+    }
+}

platforms/android/service/engine/jni/BinderComponent/HardwareDetector.h

@@ -0,0 +1,37 @@
+#ifndef __HARDWARE_DETECTOR_H__
+#define __HARDWARE_DETECTOR_H__
+
+#include <string>
+
+#define ARCH_UNKNOWN 0L
+#define ARCH_X86 16777216L
+#define ARCH_X64 33554432L
+#define ARCH_ARMv5 67108864L
+#define ARCH_ARMv6 134217728L
+#define ARCH_ARMv7 268435456L
+#define ARCH_ARMv8 536870912L
+#define ARCH_MIPS 1073741824L
+
+#define FEATURES_HAS_VFPv3d16 1L
+#define FEATURES_HAS_VFPv3 2L
+#define FEATURES_HAS_NEON 4L
+#define FEATURES_HAS_NEON2 8L
+#define FEATURES_HAS_SSE 1L
+#define FEATURES_HAS_SSE2 2L
+#define FEATURES_HAS_SSSE3 4L
+#define FEATURES_HAS_GPU 65536L
+
+// TODO: Do not forget to add Platrfom name to PackageInfo::PlatformNameMap
+// in method PackageInfo::InitPlatformNameMap()
+#define PLATFORM_UNKNOWN 0L
+#define PLATFORM_TEGRA 1L
+#define PLATFORM_TEGRA2 2L
+#define PLATFORM_TEGRA3 3L
+#define PLATFORM_TEGRA4 4L
+
+int DetectKnownPlatforms();
+int GetProcessorCount();
+std::string GetPlatformName();
+int GetCpuID();
+
+#endif

platforms/android/service/engine/jni/BinderComponent/OpenCVEngine.cpp

@@ -0,0 +1,202 @@
+#include "EngineCommon.h"
+#include "OpenCVEngine.h"
+#include "HardwareDetector.h"
+#include "StringUtils.h"
+#include <utils/Log.h>
+#include <assert.h>
+#include <string>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <dlfcn.h>
+
+using namespace android;
+
+const int OpenCVEngine::Platform = DetectKnownPlatforms();
+const int OpenCVEngine::CpuID = GetCpuID();
+const int OpenCVEngine::KnownVersions[] = {2040000, 2040100, 2040200, 2040300, 2040301, 2040302, 2040400, 2040500};
+
+bool OpenCVEngine::ValidateVersion(int version)
+{
+    for (size_t i = 0; i < sizeof(KnownVersions)/sizeof(int); i++)
+        if (KnownVersions[i] == version)
+            return true;
+
+    return false;
+}
+
+int OpenCVEngine::NormalizeVersionString(std::string version)
+{
+    int result = 0;
+
+    if (version.empty())
+    {
+        return result;
+    }
+
+    std::vector<std::string> parts = SplitStringVector(version, '.');
+
+    // Use only 4 digits of the version, i.e. 1.2.3.4.
+    // Other digits will be ignored.
+    if (parts.size() > 4)
+        parts.erase(parts.begin()+4, parts.end());
+
+    int multiplyer = 1000000;
+    for (std::vector<std::string>::const_iterator it = parts.begin(); it != parts.end(); ++it)
+    {
+        int digit = atoi(it->c_str());
+        result += multiplyer*digit;
+        multiplyer /= 100;
+    }
+
+    if (!ValidateVersion(result))
+        result  = 0;
+
+    return result;
+}
+
+OpenCVEngine::OpenCVEngine(IPackageManager* PkgManager):
+    PackageManager(PkgManager)
+{
+    assert(PkgManager);
+}
+
+int32_t OpenCVEngine::GetVersion()
+{
+    return OPEN_CV_ENGINE_VERSION;
+}
+
+String16 OpenCVEngine::GetLibPathByVersion(android::String16 version)
+{
+    std::string std_version(String8(version).string());
+    int norm_version;
+    std::string path;
+
+    LOGD("OpenCVEngine::GetLibPathByVersion(%s) impl", String8(version).string());
+
+    norm_version = NormalizeVersionString(std_version);
+
+    if (0 != norm_version)
+    {
+        path = PackageManager->GetPackagePathByVersion(norm_version, Platform, CpuID);
+        if (path.empty())
+        {
+            LOGI("Package OpenCV of version \"%s\" (%d) is not installed. Try to install it :)", String8(version).string(), norm_version);
+        }
+        else
+        {
+            FixPermissions(path);
+        }
+    }
+    else
+    {
+        LOGE("OpenCV version \"%s\" (%d) is not supported", String8(version).string(), norm_version);
+    }
+
+    return String16(path.c_str());
+}
+
+android::String16 OpenCVEngine::GetLibraryList(android::String16 version)
+{
+    std::string std_version = String8(version).string();
+    int norm_version;
+    String16 result;
+    norm_version = NormalizeVersionString(std_version);
+
+    if (0 != norm_version)
+    {
+        std::string tmp = PackageManager->GetPackagePathByVersion(norm_version, Platform, CpuID);
+        if (!tmp.empty())
+        {
+            tmp += (std::string("/") + LIB_OPENCV_INFO_NAME);
+
+            LOGD("Trying to load info library \"%s\"", tmp.c_str());
+
+            void* handle;
+            InfoFunctionType info_func;
+
+            handle = dlopen(tmp.c_str(), RTLD_LAZY);
+            if (handle)
+            {
+                const char* error;
+
+                dlerror();
+                info_func = (InfoFunctionType)dlsym(handle, "GetLibraryList");
+                if ((error = dlerror()) == NULL)
+                {
+                    result = String16((*info_func)());
+                    dlclose(handle);
+                }
+                else
+                {
+                    LOGE("Library loading error: \"%s\"", error);
+                }
+            }
+            else
+            {
+                LOGI("Info library not found in package");
+            }
+        }
+        else
+        {
+            LOGI("Package OpenCV of version \"%s\" (%d) is not installed. Try to install it :)", std_version.c_str(), norm_version);
+        }
+    }
+    else
+    {
+        LOGE("OpenCV version \"%s\" is not supported", std_version.c_str());
+    }
+
+    return result;
+}
+
+bool OpenCVEngine::InstallVersion(android::String16 version)
+{
+    std::string std_version = String8(version).string();
+    int norm_version;
+    bool result = false;
+
+    LOGD("OpenCVEngine::InstallVersion() begin");
+
+    norm_version = NormalizeVersionString(std_version);
+
+    if (0 != norm_version)
+    {
+        LOGD("PackageManager->InstallVersion call");
+        result = PackageManager->InstallVersion(norm_version, Platform, CpuID);
+    }
+    else
+    {
+        LOGE("OpenCV version \"%s\" (%d) is not supported", std_version.c_str(), norm_version);
+    }
+
+    LOGD("OpenCVEngine::InstallVersion() end");
+
+    return result;
+}
+
+bool OpenCVEngine::FixPermissions(const std::string& path)
+{
+    LOGD("Fixing permissions for folder: \"%s\"", path.c_str());
+    chmod(path.c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+
+    DIR* dir = opendir(path.c_str());
+    if (!dir)
+    {
+        LOGD("Fixing permissions error");
+        return false;
+    }
+
+    dirent* files = readdir(dir);
+    while (files)
+    {
+        LOGD("Fix permissions for \"%s\"", files->d_name);
+        chmod((path + std::string("/") + std::string(files->d_name)).c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+        files = readdir(dir);
+    }
+
+    closedir(dir);
+
+    return true;
+}

platforms/android/service/engine/jni/BinderComponent/OpenCVEngine.h

@@ -0,0 +1,37 @@
+#ifndef __OPEN_CV_ENGINE_H__
+#define __OPEN_CV_ENGINE_H__
+
+#include "EngineCommon.h"
+#include "IOpenCVEngine.h"
+#include "BnOpenCVEngine.h"
+#include "IPackageManager.h"
+#include <binder/IInterface.h>
+#include <binder/Parcel.h>
+#include <utils/String8.h>
+#include <utils/String16.h>
+#include <string>
+#include <set>
+
+class OpenCVEngine: public BnOpenCVEngine
+{
+public:
+    OpenCVEngine(IPackageManager* PkgManager);
+    int32_t GetVersion();
+    android::String16 GetLibPathByVersion(android::String16 version);
+    virtual android::String16 GetLibraryList(android::String16 version);
+    bool InstallVersion(android::String16 version);
+
+protected:
+    IPackageManager* PackageManager;
+    static const int KnownVersions[];
+
+    OpenCVEngine();
+    bool ValidateVersion(int version);
+    int NormalizeVersionString(std::string version);
+    bool FixPermissions(const std::string& path);
+
+    static const int Platform;
+    static const int CpuID;
+};
+
+#endif

platforms/android/service/engine/jni/BinderComponent/ProcReader.cpp

@@ -0,0 +1,31 @@
+#include "ProcReader.h"
+#include "StringUtils.h"
+#include <fstream>
+
+using namespace std;
+
+map<string, string> GetCpuInfo()
+{
+    map<string, string> result;
+    ifstream f;
+
+    f.open("/proc/cpuinfo");
+    if (f.is_open())
+    {
+        while (!f.eof())
+        {
+            string tmp;
+            string key;
+            string value;
+            getline(f, tmp);
+            if (ParseString(tmp, key, value))
+            {
+                result[key] = value;
+            }
+        }
+    }
+
+    f.close();
+
+    return result;
+}

platforms/android/service/engine/jni/BinderComponent/ProcReader.h

@@ -0,0 +1,29 @@
+#ifndef __PROC_READER_H__
+#define __PROC_READER_H__
+
+#include <map>
+#include <set>
+#include <string>
+
+#define CPU_INFO_NEON_STR "neon"
+#define CPU_INFO_NEON2_STR "neon2"
+#define CPU_INFO_VFPV3_STR "vfpv3"
+#define CPU_INFO_VFPV3D16_STR "vfpv3d16"
+
+#define CPU_INFO_SSE_STR "sse"
+#define CPU_INFO_SSE2_STR "sse2"
+#define CPU_INFO_SSSE3_STR "ssse3"
+
+#define CPU_INFO_ARCH_ARMV7_STR "(v7l)"
+#define CPU_INFO_ARCH_ARMV6_STR "(v6l)"
+#define CPU_INFO_ARCH_ARMV5_STR "(v5l)"
+
+#define CPU_INFO_ARCH_X86_STR "x86"
+
+#define CPU_INFO_ARCH_MIPS_STR "MIPS"
+
+
+// public part
+std::map<std::string, std::string> GetCpuInfo();
+
+#endif

platforms/android/service/engine/jni/BinderComponent/StringUtils.cpp

@@ -0,0 +1,92 @@
+#include "StringUtils.h"
+
+using namespace std;
+
+bool StripString(string& src)
+{
+    size_t pos = 0;
+
+    if (src.empty())
+    {
+        return false;
+    }
+
+    while ((pos < src.length()) && (' ' == src[pos])) pos++;
+    src.erase(0, pos);
+
+    pos = 0;
+    while ((pos < src.length()) && ('\t' == src[pos])) pos++;
+    src.erase(0, pos);
+
+    pos = src.length() - 1;
+    while (pos && (' ' == src[pos])) pos--;
+    src.erase(pos+1);
+
+    pos = src.length() - 1;
+    while (pos && ('\t' == src[pos])) pos--;
+    src.erase(pos+1);
+
+    return true;
+}
+
+bool ParseString(const string& src, string& key, string& value)
+{
+    if (src.empty())
+        return false;
+
+    // find seporator ":"
+    size_t seporator_pos = src.find(":");
+    if (string::npos != seporator_pos)
+    {
+        key = src.substr(0, seporator_pos);
+        StripString(key);
+        value = src.substr(seporator_pos+1);
+        StripString(value);
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+set<string> SplitString(const string& src, const char seporator)
+{
+    set<string> result;
+
+    if (!src.empty())
+    {
+        size_t seporator_pos;
+        size_t prev_pos = 0;
+        do
+        {
+            seporator_pos = src.find(seporator, prev_pos);
+            result.insert(src.substr(prev_pos, seporator_pos - prev_pos));
+            prev_pos = seporator_pos + 1;
+        }
+        while (string::npos != seporator_pos);
+    }
+
+    return result;
+}
+
+vector<string> SplitStringVector(const string& src, const char seporator)
+{
+    vector<string> result;
+
+    if (!src.empty())
+    {
+        size_t seporator_pos;
+        size_t prev_pos = 0;
+        do
+        {
+            seporator_pos = src.find(seporator, prev_pos);
+            string tmp = src.substr(prev_pos, seporator_pos - prev_pos);
+            result.push_back(tmp);
+            prev_pos = seporator_pos + 1;
+        }
+        while (string::npos != seporator_pos);
+    }
+
+    return result;
+}

platforms/android/service/engine/jni/BinderComponent/StringUtils.h

@@ -0,0 +1,13 @@
+#ifndef __STRING_UTILS_H__
+#define __STRING_UTILS_H__
+
+#include <string>
+#include <set>
+#include <vector>
+
+bool StripString(std::string& src);
+std::set<std::string> SplitString(const std::string& src, const char seporator);
+bool ParseString(const std::string& src, std::string& key, std::string& value);
+std::vector<std::string> SplitStringVector(const std::string& src, const char seporator);
+
+#endif

platforms/android/service/engine/jni/BinderComponent/TegraDetector.cpp

@@ -0,0 +1,61 @@
+#include "TegraDetector.h"
+#include <zlib.h>
+#include <string.h>
+
+#define KERNEL_CONFIG "/proc/config.gz"
+#define KERNEL_CONFIG_MAX_LINE_WIDTH 512
+#define KERNEL_CONFIG_TEGRA_MAGIC "CONFIG_ARCH_TEGRA=y"
+#define KERNEL_CONFIG_TEGRA2_MAGIC "CONFIG_ARCH_TEGRA_2x_SOC=y"
+#define KERNEL_CONFIG_TEGRA3_MAGIC "CONFIG_ARCH_TEGRA_3x_SOC=y"
+#define KERNEL_CONFIG_TEGRA4_MAGIC "CONFIG_ARCH_TEGRA_11x_SOC=y"
+#define MAX_DATA_LEN    4096
+
+int DetectTegra()
+{
+    int result = TEGRA_NOT_TEGRA;
+    gzFile kernelConfig = gzopen(KERNEL_CONFIG, "r");
+    if (kernelConfig != 0)
+    {
+        char tmpbuf[KERNEL_CONFIG_MAX_LINE_WIDTH];
+        const char *tegra_config = KERNEL_CONFIG_TEGRA_MAGIC;
+        const char *tegra2_config = KERNEL_CONFIG_TEGRA2_MAGIC;
+        const char *tegra3_config = KERNEL_CONFIG_TEGRA3_MAGIC;
+        const char *tegra4_config = KERNEL_CONFIG_TEGRA4_MAGIC;
+        int len = strlen(tegra_config);
+        int len2 = strlen(tegra2_config);
+        int len3 = strlen(tegra3_config);
+        int len4 = strlen(tegra4_config);
+        while (0 != gzgets(kernelConfig, tmpbuf, KERNEL_CONFIG_MAX_LINE_WIDTH))
+        {
+            if (0 == strncmp(tmpbuf, tegra_config, len))
+            {
+                result = 1;
+            }
+
+            if (0 == strncmp(tmpbuf, tegra2_config, len2))
+            {
+                result = 2;
+                break;
+            }
+
+            if (0 == strncmp(tmpbuf, tegra3_config, len3))
+            {
+                result = 3;
+                break;
+            }
+
+            if (0 == strncmp(tmpbuf, tegra4_config, len4))
+            {
+                result = 4;
+                break;
+            }
+        }
+        gzclose(kernelConfig);
+    }
+    else
+    {
+        result = TEGRA_DETECTOR_ERROR;
+    }
+
+    return result;
+}

platforms/android/service/engine/jni/BinderComponent/TegraDetector.h

@@ -0,0 +1,9 @@
+#ifndef __TEGRA_DETECTOR_H__
+#define __TEGRA_DETECTOR_H__
+
+#define TEGRA_DETECTOR_ERROR -2
+#define TEGRA_NOT_TEGRA -1
+
+int DetectTegra();
+
+#endif