VideoBase.cpp

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/*
-----------------------------------------------------------------------------
This source file is part of VideoTexture library

Copyright (c) 2007 The Zdeno Ash Miklas

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/

#if defined WIN32
#define WINDOWS_LEAN_AND_MEAN
#include <windows.h>
#endif

#include "VideoBase.h"

#include "FilterSource.h"

// VideoBase implementation


// initialize image data
void VideoBase::init(short width, short height)
{
    // save original sizes
    m_orgSize[0] = width;
    m_orgSize[1] = height;
    // call base class initialization
    ImageBase::init(width, height);
}


// process video frame
void VideoBase::process (BYTE * sample)
{
    // if scale was changed
    if (m_scaleChange)
        // reset image
        init(m_orgSize[0], m_orgSize[1]);
    // if image is allocated and is able to store new image
    if (m_image != NULL && !m_avail)
    {
        // filters used
        // convert video format to image
        switch (m_format)
        {
        case RGBA32:
            {
                FilterRGBA32 filtRGBA;
                // use filter object for format to convert image
                filterImage(filtRGBA, sample, m_orgSize);
                // finish
                break;
            }
        case RGB24:
            {
                FilterRGB24 filtRGB;
                // use filter object for format to convert image
                filterImage(filtRGB, sample, m_orgSize);
                // finish
                break;
            }
        case YV12:
            {
                // use filter object for format to convert image
                FilterYV12 filtYUV;
                filtYUV.setBuffs(sample, m_orgSize);
                filterImage(filtYUV, sample, m_orgSize);
                // finish
                break;
            }
        case None:
            break; /* assert? */
        }
    }
}


// python functions


// exceptions for video source initialization
ExceptionID SourceVideoEmpty, SourceVideoCreation;
ExpDesc SourceVideoEmptyDesc (SourceVideoEmpty, "Source Video is empty");
ExpDesc SourceVideoCreationDesc (SourceVideoCreation, "SourceVideo object was not created");

// open video source
void Video_open (VideoBase * self, char * file, short captureID)
{
    // if file is empty, throw exception
    if (file == NULL) THRWEXCP(SourceVideoEmpty, S_OK);

    // open video file or capture device
    if (captureID >= 0) 
        self->openCam(file, captureID);
    else 
        self->openFile(file);
}


// play video
PyObject * Video_play (PyImage * self)
{ if (getVideo(self)->play()) Py_RETURN_TRUE; else Py_RETURN_FALSE; }

// pause video
PyObject * Video_pause (PyImage * self)
{ if (getVideo(self)->pause()) Py_RETURN_TRUE; else Py_RETURN_FALSE; }

PyObject * Video_stop (PyImage * self)
{ if (getVideo(self)->stop()) Py_RETURN_TRUE; else Py_RETURN_FALSE; }

// get status
PyObject * Video_getStatus (PyImage * self, void * closure)
{
    return Py_BuildValue("h", getVideo(self)->getStatus());
}

// refresh video
PyObject * Video_refresh (PyImage * self)
{
    getVideo(self)->refresh();
    return Video_getStatus(self, NULL);
}


// get range
PyObject * Video_getRange (PyImage * self, void * closure)
{
    return Py_BuildValue("[ff]", getVideo(self)->getRange()[0],
        getVideo(self)->getRange()[1]);
}

// set range
int Video_setRange (PyImage * self, PyObject * value, void * closure)
{
    // check validity of parameter
    if (value == NULL || !PySequence_Check(value) || PySequence_Size(value) != 2
        || !PyFloat_Check(PySequence_Fast_GET_ITEM(value, 0))
        || !PyFloat_Check(PySequence_Fast_GET_ITEM(value, 1)))
    {
        PyErr_SetString(PyExc_TypeError, "The value must be a sequence of 2 float");
        return -1;
    }
    // set range
    getVideo(self)->setRange(PyFloat_AsDouble(PySequence_Fast_GET_ITEM(value, 0)),
        PyFloat_AsDouble(PySequence_Fast_GET_ITEM(value, 1)));
    // success
    return 0;
}

// get repeat
PyObject * Video_getRepeat (PyImage * self, void * closure)
{ return Py_BuildValue("h", getVideo(self)->getRepeat()); }

// set repeat
int Video_setRepeat (PyImage * self, PyObject * value, void * closure)
{
    // check validity of parameter
    if (value == NULL || !PyLong_Check(value))
    {
        PyErr_SetString(PyExc_TypeError, "The value must be an int");
        return -1;
    }
    // set repeat
    getVideo(self)->setRepeat(int(PyLong_AsSsize_t(value)));
    // success
    return 0;
}

// get frame rate
PyObject * Video_getFrameRate (PyImage * self, void * closure)
{ return Py_BuildValue("f", double(getVideo(self)->getFrameRate())); }

// set frame rate
int Video_setFrameRate (PyImage * self, PyObject * value, void * closure)
{
    // check validity of parameter
    if (value == NULL || !PyFloat_Check(value))
    {
        PyErr_SetString(PyExc_TypeError, "The value must be a float");
        return -1;
    }
    // set repeat
    getVideo(self)->setFrameRate(float(PyFloat_AsDouble(value)));
    // success
    return 0;
}