IEEE1394Writer Class Reference

#include <ieee1394io.h>

List of all members.

Public Member Functions
	IEEE1394Writer ()
virtual	~IEEE1394Writer ()
void	StartThread ()
void	StopThread ()
int	WaitForAction (bool isBlocking, int seconds=1)
void	TriggerAction ()
virtual bool	SendFrame (Frame &frame, bool isBlocking=true)=0
virtual bool	isValid ()=0
virtual void *	Thread ()=0
Protected Attributes
bool	m_isInitialised
unsigned int	m_channel
unsigned int	m_nBuffers
deque< Frame * >	m_deque
pthread_t	m_thread
pthread_mutex_t	m_dequeMutex
	this mutex protects capture related variables that could possibly accessed from two threads at the same time
pthread_mutex_t	m_conditionMutex
	This condition and mutex are used to indicate when new frames are received.
pthread_cond_t	m_condition
bool	m_isRunning
	A state variable for starting and stopping thread.
Static Private Member Functions
static void *	ThreadProxy (void *arg)

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Constructor & Destructor Documentation

IEEE1394Writer::IEEE1394Writer (   )

Definition at line 1210 of file ieee1394io.cc. References m_condition, m_conditionMutex, and m_dequeMutex. : m_isInitialised( false ), m_isRunning( false ) { pthread_mutex_init( &m_dequeMutex, NULL ); pthread_mutex_init( &m_conditionMutex, NULL ); pthread_cond_init( &m_condition, NULL ); }

IEEE1394Writer::~IEEE1394Writer (   )  [virtual]

Definition at line 1218 of file ieee1394io.cc. References GetFramePool(), m_condition, m_conditionMutex, m_deque, and m_dequeMutex. { for ( int i = m_deque.size(); i > 0; --i ) { Frame* frame = m_deque[ 0 ]; m_deque.pop_front(); GetFramePool()->DoneWithFrame( frame ); } pthread_mutex_destroy( &m_conditionMutex ); pthread_cond_destroy( &m_condition ); pthread_mutex_destroy( &m_dequeMutex ); }

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Member Function Documentation

virtual bool IEEE1394Writer::isValid (   )  [pure virtual]

Referenced by Export1394::start().

virtual bool IEEE1394Writer::SendFrame (  Frame &  frame, bool  isBlocking = true )  [pure virtual]

Referenced by readThread(), PageTrim::showFrame(), and PageEditor::showFrame().

void IEEE1394Writer::StartThread (   )

Definition at line 1231 of file ieee1394io.cc. References m_isRunning, m_thread, and ThreadProxy(). { if ( m_isRunning ) return; pthread_create( &m_thread, NULL, ThreadProxy, this ); }

void IEEE1394Writer::StopThread (   )

Definition at line 1238 of file ieee1394io.cc. References m_isRunning, and m_thread. { if ( m_isRunning ) { m_isRunning = false; pthread_join( m_thread, NULL ); } }

virtual void* IEEE1394Writer::Thread (   )  [pure virtual]

void * IEEE1394Writer::ThreadProxy (  void *  arg  )  [static, private]

Definition at line 1301 of file ieee1394io.cc. Referenced by StartThread(). { IEEE1394Writer* self = static_cast< IEEE1394Writer* >( arg ); return self->Thread(); }

void IEEE1394Writer::TriggerAction (   )

Definition at line 1294 of file ieee1394io.cc. References m_condition, and m_conditionMutex. { pthread_mutex_lock( &m_conditionMutex ); pthread_cond_signal( &m_condition ); pthread_mutex_unlock( &m_conditionMutex ); }

int IEEE1394Writer::WaitForAction (  bool  isBlocking, int  seconds = 1 )

Definition at line 1247 of file ieee1394io.cc. References m_condition, m_conditionMutex, m_deque, m_dequeMutex, and m_nBuffers. { pthread_mutex_lock( &m_dequeMutex ); int size = m_deque.size( ); pthread_mutex_unlock( &m_dequeMutex ); if ( ( unsigned int )size >= m_nBuffers ) { if ( isBlocking ) { pthread_mutex_lock( &m_conditionMutex ); if ( seconds == 0 ) { pthread_cond_wait( &m_condition, &m_conditionMutex ); pthread_mutex_unlock( &m_conditionMutex ); pthread_mutex_lock( &m_dequeMutex ); size = m_deque.size( ); } else { struct timeval tp; struct timespec ts; int result; gettimeofday( &tp, NULL ); ts.tv_sec = tp.tv_sec + seconds; ts.tv_nsec = tp.tv_usec * 1000; result = pthread_cond_timedwait( &m_condition, &m_conditionMutex, &ts ); pthread_mutex_unlock( &m_conditionMutex ); pthread_mutex_lock( &m_dequeMutex ); size = m_deque.size(); if ( ( unsigned int )size >= m_nBuffers ) size = -size; } pthread_mutex_unlock( &m_dequeMutex ); } else { size = -size; } } return size; }

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Member Data Documentation

unsigned int IEEE1394Writer::m_channel [protected]

Definition at line 223 of file ieee1394io.h.

pthread_cond_t IEEE1394Writer::m_condition [protected]

Definition at line 235 of file ieee1394io.h. Referenced by IEEE1394Writer(), TriggerAction(), WaitForAction(), and ~IEEE1394Writer().

pthread_mutex_t IEEE1394Writer::m_conditionMutex [protected]

This condition and mutex are used to indicate when new frames are received. Definition at line 234 of file ieee1394io.h. Referenced by IEEE1394Writer(), TriggerAction(), WaitForAction(), and ~IEEE1394Writer().

deque< Frame* > IEEE1394Writer::m_deque [protected]

Definition at line 225 of file ieee1394io.h. Referenced by WaitForAction(), and ~IEEE1394Writer().

pthread_mutex_t IEEE1394Writer::m_dequeMutex [protected]

this mutex protects capture related variables that could possibly accessed from two threads at the same time Definition at line 230 of file ieee1394io.h. Referenced by IEEE1394Writer(), WaitForAction(), and ~IEEE1394Writer().

bool IEEE1394Writer::m_isInitialised [protected]

Definition at line 222 of file ieee1394io.h.

bool IEEE1394Writer::m_isRunning [protected]

A state variable for starting and stopping thread. Definition at line 238 of file ieee1394io.h. Referenced by StartThread(), and StopThread().

unsigned int IEEE1394Writer::m_nBuffers [protected]

Definition at line 224 of file ieee1394io.h. Referenced by WaitForAction().

pthread_t IEEE1394Writer::m_thread [protected]

Definition at line 226 of file ieee1394io.h. Referenced by StartThread(), and StopThread().

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The documentation for this class was generated from the following files:

• ieee1394io.h
• ieee1394io.cc

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