接上篇博文 NDK下 将Platinum SDK 编译成so库 （android - upnp）

讲述了如何利用该代码库编译给android程序调用的so库，其中也提到了，在使用sample-upnp工程来测试生成的so库是无效的

大家比对一下Platinum开发库的Platinum\Source\Platform\Android\module\platinum\jni\platinum-jni.cpp和

Platinum\Source\Tests\MediaRenderer\MediaRendererTest.cpp

platinum-jni.cpp

  1. #include <assert.h>
  2. #include <jni.h>
  3. #include <string.h>
  4. #include <sys/types.h>
  5.  
  6. #include "platinum-jni.h"
  7. #include "Platinum.h"
  8.  
  9. #include <android/log.h>
  10.  
  11. /*----------------------------------------------------------------------
  12. |   logging
  13. +---------------------------------------------------------------------*/
  14. NPT_SET_LOCAL_LOGGER("platinum.android.jni")
  15.  
  16. /*----------------------------------------------------------------------
  17. |   functions
  18. +---------------------------------------------------------------------*/
  19. __attribute__((constructor)) static void onDlOpen(void)
  20. {
  21. }
  22.  
  23. /*----------------------------------------------------------------------
  24. |    JNI_OnLoad
  25. +---------------------------------------------------------------------*/
  26. JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved)
  27. {
  28.     NPT_LogManager::GetDefault().Configure("plist:.level=FINE;.handlers=ConsoleHandler;.ConsoleHandler.outputs=2;.ConsoleHandler.colors=false;.ConsoleHandler.filter=59");
  29.     return JNI_VERSION_1_4;
  30. }
  31.  
  32. /*
  33.  * Class:     com_plutinosoft_platinum_UPnP
  34.  * Method:    _init
  35.  * Signature: ()J
  36.  */
  37. JNIEXPORT jlong JNICALL Java_com_plutinosoft_platinum_UPnP__1init(JNIEnv *env, jclass)
  38. {
  39.     NPT_LOG_INFO("init");
  40.     PLT_UPnP* self = new PLT_UPnP();
  41.     return (jlong)self;
  42. }
  43.  
  44. /*
  45.  * Class:     com_plutinosoft_platinum_UPnP
  46.  * Method:    _start
  47.  * Signature: (J)I
  48.  */
  49. JNIEXPORT jint JNICALL Java_com_plutinosoft_platinum_UPnP__1start(JNIEnv *, jclass, jlong _self)
  50. {
  51.     NPT_LOG_INFO("start");
  52.     PLT_UPnP* self = (PLT_UPnP*)_self;
  53.  
  54.     return self->Start();
  55. }
  56.  
  57. /*
  58.  * Class:     com_plutinosoft_platinum_UPnP
  59.  * Method:    _stop
  60.  * Signature: (J)I
  61.  */
  62. JNIEXPORT jint JNICALL Java_com_plutinosoft_platinum_UPnP__1stop(JNIEnv *, jclass, jlong _self)
  63. {
  64.     NPT_LOG_INFO("stop");
  65.     PLT_UPnP* self = (PLT_UPnP*)_self;
  66.  
  67.     return self->Stop();
  68. }

MediaRendererTest.cpp

  1. #include "PltUPnP.h"
  2. #include "PltMediaRenderer.h"
  3.  
  4. #include <stdlib.h>
  5.  
  6. /*----------------------------------------------------------------------
  7. |   globals
  8. +---------------------------------------------------------------------*/
  9. struct Options {
  10.     const char* friendly_name;
  11. } Options;
  12.  
  13. /*----------------------------------------------------------------------
  14. |   PrintUsageAndExit
  15. +---------------------------------------------------------------------*/
  16. static void
  17. PrintUsageAndExit(char** args)
  18. {
  19.     fprintf(stderr, "usage: %s [-f <friendly_name>]\n", args[0]);
  20.     fprintf(stderr, "-f : optional upnp server friendly name\n");
  21.     fprintf(stderr, "<path> : local path to serve\n");
  22.     exit(1);
  23. }
  24.  
  25. /*----------------------------------------------------------------------
  26. |   ParseCommandLine
  27. +---------------------------------------------------------------------*/
  28. static void
  29. ParseCommandLine(char** args)
  30. {
  31.     const char* arg;
  32.     char**      tmp = args+1;
  33.  
  34.     /* default values */
  35.     Options.friendly_name = NULL;
  36.  
  37.     while ((arg = *tmp++)) {
  38.         if (!strcmp(arg, "-f")) {
  39.             Options.friendly_name = *tmp++;
  40.         } else {
  41.             fprintf(stderr, "ERROR: too many arguments\n");
  42.             PrintUsageAndExit(args);
  43.         }
  44.     }
  45. }
  46.  
  47. /*----------------------------------------------------------------------
  48. |   main
  49. +---------------------------------------------------------------------*/
  50. int
  51. main(int /* argc */, char** argv)
  52. {
  53.     PLT_UPnP upnp;
  54.  
  55.     /* parse command line */
  56.     ParseCommandLine(argv);
  57.  
  58.     PLT_DeviceHostReference device(
  59.         new PLT_MediaRenderer(Options.friendly_name?Options.friendly_name:"Platinum Media Renderer",
  60.                               false,
  61.                               "e6572b54-f3c7-2d91-2fb5-b757f2537e21"));
  62.     upnp.AddDevice(device);
  63.     bool added = true;
  64.  
  65.     upnp.Start();
  66.  
  67.     char buf[256];
  68.     while (gets(buf)) {
  69.         if (*buf == 'q')
  70.             break;
  71.  
  72.         if (*buf == 's') {
  73.             if (added) {
  74.                 upnp.RemoveDevice(device);
  75.             } else {
  76.                 upnp.AddDevice(device);
  77.             }
  78.             added = !added;
  79.         }
  80.     }
  81.  
  82.     upnp.Stop();
  83.     return 0;
  84. }

可以看出JNI接口中的PLT_UPnP对象并没有加入PLT_DeviceHostReference对象，所以无法启动设备，只要参照MediaRenderTest.cpp的做法我们就可以实现一个dmr设备的开启与关闭了，童鞋们可以仿照博文 基于Platinum库的DMR实现（android）当中的jni类来尝试实现一下这两个接口

public static native int startMediaRender(byte[] friendname ,byte[] uuid);

public static native int stopMediaRender();

完成这一步，DMR的实现就已经成功一半了

接下来我们要做的两件事就是

1.将外部的action事件通过反射机制抛给java层处理

2.通过jni将一些事件状态值更新至所在服务列表

先看第一点，每当有action事件到来时，PLT_MediaRenderer的

virtual NPT_Result OnAction(PLT_ActionReference&action,const PLT_HttpRequestContext& context);方法就会被调用

  1. NPT_Result
  2. PLT_MediaRenderer::OnAction(PLT_ActionReference&          action,
  3.                             const PLT_HttpRequestContext& context)
  4. {
  5.     NPT_COMPILER_UNUSED(context);
  6.  
  7.     /* parse the action name */
  8.     NPT_String name = action->GetActionDesc().GetName();
  9.  
  10.     // since all actions take an instance ID and we only support 1 instance
  11.     // verify that the Instance ID is 0 and return an error here now if not
  12.     NPT_String serviceType = action->GetActionDesc().GetService()->GetServiceType();
  13.     if (serviceType.Compare("urn:schemas-upnp-org:service:AVTransport:1", true) == 0) {
  14.         if (NPT_FAILED(action->VerifyArgumentValue("InstanceID", "0"))) {
  15.             action->SetError(718, "Not valid InstanceID");
  16.             return NPT_FAILURE;
  17.         }
  18.     }
  19. 	serviceType = action->GetActionDesc().GetService()->GetServiceType();
  20. 	if (serviceType.Compare("urn:schemas-upnp-org:service:RenderingControl:1", true) == 0) {
  21. 		if (NPT_FAILED(action->VerifyArgumentValue("InstanceID", "0"))) {
  22. 			action->SetError(702, "Not valid InstanceID");
  23. 			return NPT_FAILURE;
  24. 		}
  25. 	}
  26.  
  27. 	/* Is it a ConnectionManager Service Action ? */
  28. 	if (name.Compare("GetCurrentConnectionInfo", true) == 0) {
  29. 		return OnGetCurrentConnectionInfo(action);
  30. 	}  
  31.  
  32. 	/* Is it a AVTransport Service Action ? */
  33.     if (name.Compare("Next", true) == 0) {
  34.         return OnNext(action);
  35.     }
  36.     if (name.Compare("Pause", true) == 0) {
  37.         return OnPause(action);
  38.     }
  39.     if (name.Compare("Play", true) == 0) {
  40.         return OnPlay(action);
  41.     }
  42.     if (name.Compare("Previous", true) == 0) {
  43.         return OnPrevious(action);
  44.     }
  45.     if (name.Compare("Seek", true) == 0) {
  46.         return OnSeek(action);
  47.     }
  48.     if (name.Compare("Stop", true) == 0) {
  49.         return OnStop(action);
  50.     }
  51.     if (name.Compare("SetAVTransportURI", true) == 0) {
  52.         return OnSetAVTransportURI(action);
  53.     }
  54.     if (name.Compare("SetPlayMode", true) == 0) {
  55.         return OnSetPlayMode(action);
  56.     }
  57.  
  58.     /* Is it a RendererControl Service Action ? */
  59.     if (name.Compare("SetVolume", true) == 0) {
  60.           return OnSetVolume(action);
  61.     }
  62. 	if (name.Compare("SetVolumeDB", true) == 0) {
  63. 		return OnSetVolumeDB(action);
  64.     }
  65. 	if (name.Compare("GetVolumeDBRange", true) == 0) {
  66. 		return OnGetVolumeDBRange(action);
  67.  
  68. 	}
  69.     if (name.Compare("SetMute", true) == 0) {
  70.           return OnSetMute(action);
  71.     }
  72.  
  73.     // other actions rely on state variables
  74.     NPT_CHECK_LABEL_WARNING(action->SetArgumentsOutFromStateVariable(), failure);
  75.     return NPT_SUCCESS;
  76.  
  77. failure:
  78.     action->SetError(401,"No Such Action.");
  79.     return NPT_FAILURE;
  80. }

部分事件会由m_Delegate成员变量来处理，也就是 virtual void SetDelegate(PLT_MediaRendererDelegate* delegate) { m_Delegate = delegate; }传进来的

所以我们只需要从PLT_MediaRendererDelegate类派生一个子类，然后将它设进PLT_MediaRenderer并实现相应的action方法并把一些需要的值反射出来即可

  1. class PLT_MediaRendererDelegate
  2. {
  3. public:
  4.     virtual ~PLT_MediaRendererDelegate() {}
  5.  
  6.     // ConnectionManager
  7.     virtual NPT_Result OnGetCurrentConnectionInfo(PLT_ActionReference& action) = 0;
  8.  
  9.     // AVTransport
  10.     virtual NPT_Result OnNext(PLT_ActionReference& action) = 0;
  11.     virtual NPT_Result OnPause(PLT_ActionReference& action) = 0;
  12.     virtual NPT_Result OnPlay(PLT_ActionReference& action) = 0;
  13.     virtual NPT_Result OnPrevious(PLT_ActionReference& action) = 0;
  14.     virtual NPT_Result OnSeek(PLT_ActionReference& action) = 0;
  15.     virtual NPT_Result OnStop(PLT_ActionReference& action) = 0;
  16.     virtual NPT_Result OnSetAVTransportURI(PLT_ActionReference& action) = 0;
  17.     virtual NPT_Result OnSetPlayMode(PLT_ActionReference& action) = 0;
  18.  
  19.     // RenderingControl
  20.     virtual NPT_Result OnSetVolume(PLT_ActionReference& action) = 0;
  21.     virtual NPT_Result OnSetVolumeDB(PLT_ActionReference& action) = 0;
  22.     virtual NPT_Result OnGetVolumeDBRange(PLT_ActionReference& action) = 0;
  23.     virtual NPT_Result OnSetMute(PLT_ActionReference& action) = 0;
  24. };
  1. void ActionInflect(int cmd, const char* value, const char* data)
  2. {
  3.  
  4. 	if (g_vm == NULL)
  5. 	{
  6. 		UpnpPrintInfo("g_vm = NULL!!!");
  7. 		return ;
  8. 	}
  9.  
  10. 	int status;
  11. 	JNIEnv *env = NULL;
  12. 	bool isAttach = false;
  13. 	status = g_vm->GetEnv((void **) &env, JNI_VERSION_1_6);
  14. 	if(status != JNI_OK)
  15. 	{
  16. 		status = g_vm->AttachCurrentThread(&env, NULL);
  17. 		if(status < 0) {
  18. 			UpnpPrintInfo("callback_handler: failed to attach , current thread, status = %d", status);
  19. 			return;
  20. 		}
  21. 		isAttach = true;
  22. 	}
  23.  
  24. 	jstring valueString = NULL;
  25. 	jstring dataString = NULL;
  26. 	jclass inflectClass = g_inflectClass;
  27. 	jmethodID inflectMethod = g_methodID;
  28.  
  29. 	if (inflectClass == NULL || inflectMethod == NULL)
  30. 	{
  31. 		goto end;
  32. 	}
  33.  
  34. //	UpnpPrintInfo("CMD = %d\nVALUE = %s\nDATA = %s",cmd, value, data);
  35.  
  36. 	valueString = env->NewStringUTF(value);
  37. 	dataString = env->NewStringUTF(data);
  38.  
  39. 	env->CallStaticVoidMethod(inflectClass, inflectMethod, cmd, valueString, dataString);
  40.  
  41. 	env->DeleteLocalRef(valueString);
  42. 	env->DeleteLocalRef(dataString);
  43.  
  44. end:
  45. 	if (env->ExceptionOccurred())
  46. 	{
  47. 		env->ExceptionDescribe();
  48. 		env->ExceptionClear();
  49. 	}
  50. 	if (isAttach)
  51. 	{
  52. 		g_vm->DetachCurrentThread();
  53. 	}
  54.  
  55. }

再看第二点，如何将事件变量值更新至服务列表

首先通过FindServiceByType方法找到urn:schemas-upnp-org:service:AVTransport:1服务，

然后通过SetStateVariable更新值即可

变量名与值对应关系大家参照dlna文档开发即可

http://download.csdn.net/detail/geniuseoe2012/4969961

重点看standardizeddcps\MediaServer_4 and  MediaRenderer_3下的UPnP-av-AVTransport-v3-Service-20101231.pdf文档

代码实现可以参照PLT_MediaRenderer::SetupServices()方法

  1. NPT_Result
  2. PLT_MediaRenderer::SetupServices()
  3. {
  4.     PLT_Service* service;
  5.  
  6.     {
  7.         /* AVTransport */
  8.         service = new PLT_Service(
  9.             this,
  10.             "urn:schemas-upnp-org:service:AVTransport:1",
  11.             "urn:upnp-org:serviceId:AVTransport",
  12.             "AVTransport",
  13.             "urn:schemas-upnp-org:metadata-1-0/AVT/");
  14.         NPT_CHECK_FATAL(service->SetSCPDXML((const char*) RDR_AVTransportSCPD));
  15.         NPT_CHECK_FATAL(AddService(service));
  16.  
  17.         service->SetStateVariableRate("LastChange", NPT_TimeInterval(0.2f));
  18.         service->SetStateVariable("A_ARG_TYPE_InstanceID", "0"); 
  19.  
  20.         // GetCurrentTransportActions
  21.         service->SetStateVariable("CurrentTransportActions", "Play,Pause,Stop,Seek,Next,Previous");
  22.  
  23.         // GetDeviceCapabilities
  24.         service->SetStateVariable("PossiblePlaybackStorageMedia", "NONE,NETWORK,HDD,CD-DA,UNKNOWN");
  25.         service->SetStateVariable("PossibleRecordStorageMedia", "NOT_IMPLEMENTED");
  26.         service->SetStateVariable("PossibleRecordQualityModes", "NOT_IMPLEMENTED");
  27.  
  28.         // GetMediaInfo
  29.         service->SetStateVariable("NumberOfTracks", "0");
  30.         service->SetStateVariable("CurrentMediaDuration", "00:00:00");
  31.         service->SetStateVariable("AVTransportURI", "");
  32.         service->SetStateVariable("AVTransportURIMetadata", "");;
  33.         service->SetStateVariable("NextAVTransportURI", "NOT_IMPLEMENTED");
  34.         service->SetStateVariable("NextAVTransportURIMetadata", "NOT_IMPLEMENTED");
  35.         service->SetStateVariable("PlaybackStorageMedium", "NONE");
  36.         service->SetStateVariable("RecordStorageMedium", "NOT_IMPLEMENTED");
  37. 		service->SetStateVariable("RecordMediumWriteStatus", "NOT_IMPLEMENTED");
  38.  
  39.         // GetPositionInfo
  40.         service->SetStateVariable("CurrentTrack", "0");
  41.         NPT_Result durResult = service->SetStateVariable("CurrentTrackDuration", "00:00:00");
  42.         service->SetStateVariable("CurrentTrackMetadata", "");
  43.         service->SetStateVariable("CurrentTrackURI", "");
  44.         NPT_Result relTimeResult = service->SetStateVariable("RelativeTimePosition", "00:00:00");
  45.         service->SetStateVariable("AbsoluteTimePosition", "00:50:00");
  46.         service->SetStateVariable("RelativeCounterPosition", "2147483647"); // means NOT_IMPLEMENTED
  47.         service->SetStateVariable("AbsoluteCounterPosition", "2147483647"); // means NOT_IMPLEMENTED
  48.  
  49.         // disable indirect eventing for certain state variables
  50.         PLT_StateVariable* var;
  51.         var = service->FindStateVariable("RelativeTimePosition");
  52.         if (var) var->DisableIndirectEventing();
  53.         var = service->FindStateVariable("AbsoluteTimePosition");
  54.         if (var) var->DisableIndirectEventing();
  55.         var = service->FindStateVariable("RelativeCounterPosition");
  56.         if (var) var->DisableIndirectEventing();
  57.         var = service->FindStateVariable("AbsoluteCounterPosition");
  58.         if (var) var->DisableIndirectEventing();
  59.  
  60.         // GetTransportInfo
  61.         service->SetStateVariable("TransportState", "NO_MEDIA_PRESENT");
  62.         service->SetStateVariable("TransportStatus", "OK");
  63.         service->SetStateVariable("TransportPlaySpeed", "1");
  64.  
  65.         // GetTransportSettings
  66.         service->SetStateVariable("CurrentPlayMode", "NORMAL");
  67.         service->SetStateVariable("CurrentRecordQualityMode", "NOT_IMPLEMENTED");
  68.     }
  69.  
  70.     {
  71.         /* ConnectionManager */
  72.         service = new PLT_Service(
  73.             this,
  74.             "urn:schemas-upnp-org:service:ConnectionManager:1",
  75.             "urn:upnp-org:serviceId:ConnectionManager",
  76.             "ConnectionManager");
  77.         NPT_CHECK_FATAL(service->SetSCPDXML((const char*) RDR_ConnectionManagerSCPD));
  78.         NPT_CHECK_FATAL(AddService(service));
  79.  
  80.         service->SetStateVariable("CurrentConnectionIDs", "0");
  81.  
  82.         // put all supported mime types here instead
  83.         service->SetStateVariable("SinkProtocolInfo", "http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVMED_PRO,http-get:*:video/x-ms-asf:DLNA.ORG_PN=MPEG4_P2_ASF_SP_G726,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVMED_FULL,http-get:*:image/jpeg:DLNA.ORG_PN=JPEG_MED,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVMED_BASE,http-get:*:audio/L16;rate=44100;channels=1:DLNA.ORG_PN=LPCM,http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_PAL,http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_NTSC,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVHIGH_PRO,http-get:*:audio/L16;rate=44100;channels=2:DLNA.ORG_PN=LPCM,http-get:*:image/jpeg:DLNA.ORG_PN=JPEG_SM,http-get:*:video/x-ms-asf:DLNA.ORG_PN=VC1_ASF_AP_L1_WMA,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMDRM_WMABASE,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVHIGH_FULL,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMAFULL,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMABASE,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVSPLL_BASE,http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_NTSC_XAC3,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMDRM_WMVSPLL_BASE,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVSPML_BASE,http-get:*:video/x-ms-asf:DLNA.ORG_PN=MPEG4_P2_ASF_ASP_L5_SO_G726,http-get:*:image/jpeg:DLNA.ORG_PN=JPEG_LRG,http-get:*:audio/mpeg:DLNA.ORG_PN=MP3,http-get:*:video/mpeg:DLNA.ORG_PN=MPEG_PS_PAL_XAC3,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMAPRO,http-get:*:video/mpeg:DLNA.ORG_PN=MPEG1,http-get:*:image/jpeg:DLNA.ORG_PN=JPEG_TN,http-get:*:video/x-ms-asf:DLNA.ORG_PN=MPEG4_P2_ASF_ASP_L4_SO_G726,http-get:*:audio/L16;rate=48000;channels=2:DLNA.ORG_PN=LPCM,http-get:*:audio/mpeg:DLNA.ORG_PN=MP3X,http-get:*:video/x-ms-wmv:DLNA.ORG_PN=WMVSPML_MP3,http-get:*:video/x-ms-wmv:*,http-get:*:video/mp4:*");
  84.         service->SetStateVariable("SourceProtocolInfo", "");
  85.     }
  86.  
  87.     {
  88.         /* RenderingControl */
  89.         service = new PLT_Service(
  90.             this,
  91.             "urn:schemas-upnp-org:service:RenderingControl:1",
  92.             "urn:upnp-org:serviceId:RenderingControl",
  93.             "RenderingControl",
  94.             "urn:schemas-upnp-org:metadata-1-0/RCS/");
  95.         NPT_CHECK_FATAL(service->SetSCPDXML((const char*) RDR_RenderingControlSCPD));
  96.         NPT_CHECK_FATAL(AddService(service));
  97.  
  98.         service->SetStateVariableRate("LastChange", NPT_TimeInterval(0.2f));
  99.  
  100.         service->SetStateVariable("Mute", "0");
  101.         service->SetStateVariableExtraAttribute("Mute", "Channel", "Master");
  102.         service->SetStateVariable("Volume", "100");
  103.         service->SetStateVariableExtraAttribute("Volume", "Channel", "Master");
  104.         service->SetStateVariable("VolumeDB", "0");
  105.         service->SetStateVariableExtraAttribute("VolumeDB", "Channel", "Master");
  106.  
  107.         service->SetStateVariable("PresetNameList", "FactoryDefaults");
  108.     }
  109.  
  110.     return NPT_SUCCESS;
  111. }

至此代码实现步骤已全部讲解完毕，当然在具体实现过程中多多少少会遇到些问题

根据log信息多问问谷哥度娘，一般都能找到解决方案的

同时在jni层转换C++类型与java类型时一定要注意及时释放资源，不要造成内存泄漏了

另外不要再向楼主索要源码了，编程最重要的是思维

只有自己动手实践了，摸索了，思考了，解决了，自身水平才会提高

否则你永远都只能是code-farmer而无法成为code-designer

授之以鱼不如授之予渔也是蓝老师一贯的教学宗旨，伸手党请自觉绕道

最后感谢大家的支持，我们下节课再见！

more brilliant，Please pay attention to my CSDN blog -->http://blog.csdn.net/geniuseoe2012

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