From 697af707e4f2be30ce2b41caac3c86bb88104c83 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 10 Mar 2004 15:41:40 +0000
Subject: [PATCH] Ported mpeg plugin across to use OpenThreads instead of
 pthreads.

---
 src/osgPlugins/mpeg/GNUmakefile         |  2 +-
 src/osgPlugins/mpeg/MpegImageStream.cpp | 37 +++++++++++++------------
 src/osgPlugins/mpeg/MpegImageStream.h   | 23 ++++++++-------
 3 files changed, 31 insertions(+), 31 deletions(-)

diff --git a/src/osgPlugins/mpeg/GNUmakefile b/src/osgPlugins/mpeg/GNUmakefile
index 41771ec8b..e6f19b0b1 100644
--- a/src/osgPlugins/mpeg/GNUmakefile
+++ b/src/osgPlugins/mpeg/GNUmakefile
@@ -5,7 +5,7 @@ CXXFILES =\
         MpegImageStream.cpp\
         ReaderWriterMPEG.cpp\
 
-MPEG_LIBS = -lmpeg3 -lpthread
+MPEG_LIBS = -lmpeg3
 
 LIBS  += $(OSG_LIBS) $(MPEG_LIBS) $(OTHER_LIBS)
 
diff --git a/src/osgPlugins/mpeg/MpegImageStream.cpp b/src/osgPlugins/mpeg/MpegImageStream.cpp
index 8428243bc..fc9fea5ee 100644
--- a/src/osgPlugins/mpeg/MpegImageStream.cpp
+++ b/src/osgPlugins/mpeg/MpegImageStream.cpp
@@ -55,13 +55,10 @@ MpegImageStream::MpegImageStream(const char* fileName) : ImageStream()
 
     load(fileName);
 
-    ::pthread_mutex_init(&_mutex, NULL);
-    ::pthread_create(&_id, NULL, MpegImageStream::s_decode, this);
-
     if (fileName)
         setFileName(fileName);
 
-
+    startThread();
 }
 
 
@@ -69,9 +66,24 @@ MpegImageStream::MpegImageStream(const char* fileName) : ImageStream()
 MpegImageStream::~MpegImageStream()
 {
     stop();
+
     setCmd(THREAD_QUIT);
-    ::pthread_join(_id, NULL);
-    ::pthread_mutex_destroy(&_mutex);
+
+    if( isRunning() )
+    {
+
+        // cancel the thread..
+        cancel();
+        //join();
+
+        // then wait for the the thread to stop running.
+        while(isRunning())
+        {
+            osg::notify(osg::DEBUG_INFO)<<"Waiting for MpegImageStream to cancel"<<std::endl;
+            OpenThreads::Thread::YieldCurrentThread();
+        }
+        
+    }
 
     mpeg3_t* mpg = (mpeg3_t*)_mpg;
     if (mpg) {
@@ -110,14 +122,6 @@ MpegImageStream::ThreadCommand MpegImageStream::getCmd()
 }
 
 
-/*
- * Decoder thread
- */
-void* MpegImageStream::s_decode(void* vp)
-{
-    return ((MpegImageStream*) vp)->decode(vp);
-}
-
 void MpegImageStream::load(const char* fileName)
 {
     mpeg3_t* mpg = mpeg3_open((char*) fileName);
@@ -198,7 +202,7 @@ void MpegImageStream::load(const char* fileName)
 }
 
 
-void* MpegImageStream::decode(void*)
+void MpegImageStream::run()
 {
     bool playing = false;
     mpeg3_t* mpg = (mpeg3_t*)_mpg;
@@ -283,7 +287,4 @@ void* MpegImageStream::decode(void*)
         }
     }
 
-    // Cleanup decoder
-
-    return NULL;
 }
diff --git a/src/osgPlugins/mpeg/MpegImageStream.h b/src/osgPlugins/mpeg/MpegImageStream.h
index 233aac51e..58a0322b4 100644
--- a/src/osgPlugins/mpeg/MpegImageStream.h
+++ b/src/osgPlugins/mpeg/MpegImageStream.h
@@ -29,9 +29,9 @@
 #define _MPEGIMAGESTREAM_H_
 
 #include <osg/ImageStream>
-//#include "ImageStream.h"
 
-#include <pthread.h>
+#include <OpenThreads/Thread>
+#include <OpenThreads/Mutex>
 
 #define NUM_CMD_INDEX 4
 
@@ -40,7 +40,7 @@ namespace osg {
     /**
      * MPEG1/2 Image Stream class.
      */
-    class SG_EXPORT MpegImageStream : public osg::ImageStream
+    class SG_EXPORT MpegImageStream : public osg::ImageStream, public OpenThreads::Thread
     {
     public:
         MpegImageStream(const char* fileName = NULL);
@@ -52,13 +52,13 @@ namespace osg {
         virtual const char* className() const { return "MpegImageStream"; }
 
         /// Start or continue stream.
-        virtual inline void start() { setCmd(THREAD_START); }
+        virtual void start() { setCmd(THREAD_START); }
 
         /// Stop stream at current position.
-        virtual inline void stop() { setCmd(THREAD_STOP); }
+        virtual void stop() { setCmd(THREAD_STOP); }
 
         /// Rewind stream to beginning.
-        virtual inline void rewind() { setCmd(THREAD_REWIND); }
+        virtual void rewind() { setCmd(THREAD_REWIND); }
 
         /// Enable/disable MMX.
         inline void enableMMX(bool b) { _useMMX = b; }
@@ -81,6 +81,8 @@ namespace osg {
         
         void load(const char* fileName);
 
+        virtual void run();
+
     protected:
         virtual ~MpegImageStream();
 
@@ -101,12 +103,11 @@ namespace osg {
         ThreadCommand _cmd[NUM_CMD_INDEX];
         int _wrIndex, _rdIndex;
 
-        pthread_mutex_t _mutex;
-        pthread_t _id;
+        OpenThreads::Mutex _mutex;
 
         // Lock/unlock object.
-        inline void lock() { ::pthread_mutex_lock(&_mutex); }
-        inline void unlock() { ::pthread_mutex_unlock(&_mutex); }
+        inline void lock() { _mutex.lock(); }
+        inline void unlock() { _mutex.unlock(); }
 
         /// Set command.
         void setCmd(ThreadCommand cmd);
@@ -115,8 +116,6 @@ namespace osg {
         ThreadCommand getCmd();
 
         /// Decoder hook.
-        static void* s_decode(void*);
-        void* decode(void*);
         
         void* _mpg;
         unsigned char** _rows;