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/*
* pdp2gem : pdp to gem bridge
*
* Holds the contents of a PDP packet and introduce it in the GEM rendering chain
*
* Copyright (c) 2003 Yves Degoyon
*
*/
#include "pdp2gem.h"
#include "yuv.h"
CPPEXTERN_NEW(pdp2gem)
pdp2gem :: pdp2gem(void)
{
// initialize the pix block data
m_pixBlock.image.data = NULL;
m_pixBlock.image.xsize = 0;
m_pixBlock.image.ysize = 0;
m_pixBlock.image.csize = 3;
m_pixBlock.image.format = GL_RGB;
m_pixBlock.image.type = GL_UNSIGNED_BYTE;
m_format = GL_RGB;
m_csize = 3;
m_data = NULL;
m_packet0 = -1;
m_xsize = 0;
m_ysize = 0;
m_dropped = 0;
m_pdpdata = NULL;
m_mutex = NULL;
m_mutex = (pthread_mutex_t*) malloc(sizeof(pthread_mutex_t));
if ( pthread_mutex_init(m_mutex, NULL) < 0 )
{
perror("pdp2gem : couldn't create mutex");
}
else
{
post("pdp2gem : created mutex");
}
}
pdp2gem :: ~pdp2gem()
{
if ( m_mutex )
{
pthread_mutex_destroy(m_mutex);
free(m_mutex);
post("pdp2gem : destroyed mutex");
}
deleteBuffer();
}
void pdp2gem :: deleteBuffer()
{
if ( m_data )
{
delete [] m_data;
}
m_pixBlock.image.data=NULL;
}
void pdp2gem :: createBuffer()
{
const int neededXSize = m_xsize;
const int neededYSize = m_ysize;
int dataSize;
deleteBuffer();
m_pixBlock.image.xsize = neededXSize;
m_pixBlock.image.ysize = neededYSize;
m_pixBlock.image.csize = m_csize;
m_pixBlock.image.format= m_format;
// +4 from MPEG
dataSize = (m_pixBlock.image.xsize * m_pixBlock.image.ysize * m_pixBlock.image.csize)+4;
m_data = new unsigned char[dataSize];
memset(m_data, 0, dataSize);
m_pixBlock.image.data = m_data;
post("pdp2gem : created buffer %dx%d", m_xsize, m_ysize );
}
void pdp2gem :: pdpMess(t_symbol *action, t_int pcktno)
{
t_int psize;
short int *pY, *pU, *pV;
unsigned char r,g,b;
unsigned char y,u,v;
t_int cpt, px, py;
if (action == gensym("register_ro"))
{
m_dropped = pdp_packet_copy_ro_or_drop(&m_packet0, pcktno);
}
// post("pdp2gem : got pdp packet #%d : dropped : %d", pcktno, m_dropped );
m_header = pdp_packet_header(m_packet0);
if ((action == gensym("process")) && (-1 != m_packet0) && (!m_dropped))
{
if ( PDP_IMAGE == m_header->type )
{
if (pdp_packet_header(m_packet0)->info.image.encoding == PDP_IMAGE_YV12)
{
if ( ( m_xsize != (int)m_header->info.image.width ) ||
( m_ysize != (int)m_header->info.image.height ) )
{
m_xsize = m_header->info.image.width;
m_ysize = m_header->info.image.height;
createBuffer();
}
m_pdpdata = (short int *)pdp_packet_data(m_packet0);
psize = m_xsize*m_ysize;
pY = m_pdpdata;
pV = m_pdpdata+psize;
pU = m_pdpdata+psize+(psize>>2);
// lock mutex
pthread_mutex_lock(m_mutex);
// copy image data
for ( py=0; py<m_ysize; py++)
{
for ( px=0; px<m_xsize; px++)
{
cpt=((m_ysize-py)*m_xsize+px)*3;
y = *(pY)>>7;
v = (*(pV)>>8)+128;
u = (*(pU)>>8)+128;
m_data[cpt++] = yuv_YUVtoR( y, u, v );
m_data[cpt++] = yuv_YUVtoG( y, u, v );
m_data[cpt] = yuv_YUVtoB( y, u, v );
pY++;
if ( (px%2==0) && (py%2==0) )
{
pV++; pU++;
}
}
}
// unlock mutex
pthread_mutex_unlock(m_mutex);
// free PDP packet
pdp_packet_mark_unused(m_packet0);
m_packet0 = -1;
}
else
{
post("pdp2gem : unsupported image type", m_header->info.image.encoding );
}
}
}
}
void pdp2gem :: startRendering()
{
m_pixBlock.newimage = 1;
}
void pdp2gem :: render(GemState *state)
{
if ( m_data )
{
// lock mutex
pthread_mutex_lock(m_mutex);
m_pixBlock.newimage = 1;
state->image = &m_pixBlock;
}
}
void pdp2gem :: postrender(GemState *state)
{
m_pixBlock.newimage = 0;
// unlock mutex
pthread_mutex_unlock(m_mutex);
}
void pdp2gem :: obj_setupCallback(t_class *classPtr)
{
post( "pdp2gem : a bridge between PDP/PiDiP and GEM v"GEM2PDP_VERSION" (ydegoyon@free.fr)" );
class_addmethod(classPtr, (t_method)&pdp2gem::pdpCallback, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
}
void pdp2gem :: pdpCallback(void *data, t_symbol *action, t_floatarg fpcktno)
{
// post("pdp2gem : callback : action : %s : no : %f", action->s_name, fpcktno );
GetMyClass(data)->pdpMess(action, (int)fpcktno);
}
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