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opencv/modules/highgui/src/cap_xine.cpp

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
// Authors: Konstantin Dols <dols@ient.rwth-aachen.de>
// Mark Asbach <asbach@ient.rwth-aachen.de>
//
// Institute of Communications Engineering
// RWTH Aachen University
#include "precomp.hpp"
// required to enable some functions used here...
#define XINE_ENABLE_EXPERIMENTAL_FEATURES
#include <cv.h>
#include <cassert>
extern "C"
{
#include <xine.h>
//#include <xine/xineutils.h>
// forward declaration from <xine/xineutils.h>
const char *xine_get_homedir( void );
}
typedef struct CvCaptureAVI_XINE
{
/// method call table
xine_t * xine;
xine_stream_t * stream;
xine_video_port_t * vo_port;
/// frame returned by xine_get_next_video_frame()
xine_video_frame_t xine_frame;
IplImage * yuv_frame;
IplImage * bgr_frame;
/// image dimansions of the input stream.
CvSize size;
/// framenumber of the last frame received from xine_get_next_video_frame().
/// note: always keep this value updated !!!!
int frame_number;
/// framerate of the opened stream
double frame_rate;
/// duration of a frame in stream
double frame_duration;
/// indicated if input is seekable
bool seekable;
}
CvCaptureAVI_XINE;
// 4:2:2 interleaved -> BGR
static void icvYUY2toBGR( CvCaptureAVI_XINE * capture )
{
uint8_t * v = capture->xine_frame.data;
int offset;
for ( int y = 0; y < capture->yuv_frame->height; y++ )
{
offset = y * capture->yuv_frame->widthStep;
for ( int x = 0; x < capture->yuv_frame->width; x++, offset += 3 )
{
capture->yuv_frame->imageData[ offset + 1 ] = v[ 3 ];
capture->yuv_frame->imageData[ offset + 2 ] = v[ 1 ];
if ( x & 1 )
{
capture->yuv_frame->imageData[ offset ] = v[ 2 ];
v += 4;
}
else
{
capture->yuv_frame->imageData[ offset ] = v[ 0 ];
}
}
}
// convert to BGR
cvCvtColor( capture->yuv_frame, capture->bgr_frame, CV_YCrCb2BGR );
}
// 4:2:0 planary -> BGR
static void icvYV12toBGR( CvCaptureAVI_XINE * capture )
{
IplImage * yuv = capture->yuv_frame;
int w_Y = capture->size.width;
int h_Y = capture->size.height;
int w_UV = w_Y >> 1;
int size_Y = w_Y * h_Y;
int size_UV = size_Y / 4;
int line = yuv->widthStep;
uint8_t * addr_Y = capture->xine_frame.data;
uint8_t * addr_U = addr_Y + size_Y;
uint8_t * addr_V = addr_U + size_UV;
// YYYY..UU.VV. -> BGRBGRBGR...
for ( int y = 0; y < h_Y; y++ )
{
int offset = y * line;
for ( int x = 0; x < w_Y; x++, offset += 3 )
{
/*
if ( x&1 )
{
addr_U++; addr_V++;
}
*/
int one_zero = x & 1;
addr_U += one_zero;
addr_V += one_zero;
yuv->imageData[ offset ] = *( addr_Y++ );
yuv->imageData[ offset + 1 ] = *addr_U;
yuv->imageData[ offset + 2 ] = *addr_V;
}
if ( y & 1 )
{
addr_U -= w_UV;
addr_V -= w_UV;
}
}
/* convert to BGR */
cvCvtColor( capture->yuv_frame, capture->bgr_frame, CV_YCrCb2BGR );
}
static void icvCloseAVI_XINE( CvCaptureAVI_XINE* capture )
{
xine_free_video_frame( capture->vo_port, &capture->xine_frame );
if ( capture->yuv_frame ) cvReleaseImage( &capture->yuv_frame );
if ( capture->bgr_frame ) cvReleaseImage( &capture->bgr_frame );
xine_close( capture->stream );
// xine_dispose( capture->stream );
if ( capture->vo_port ) xine_close_video_driver( capture->xine, capture->vo_port );
xine_exit( capture->xine );
}
/**
* CHECKS IF THE STREAM IN * capture IS SEEKABLE.
**/
static void icvCheckSeekAVI_XINE( CvCaptureAVI_XINE * capture )
{
OPENCV_ASSERT ( capture, "icvCheckSeekAVI_XINE( CvCaptureAVI_XINE* )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvCheckSeekAVI_XINE( CvCaptureAVI_XINE* )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvCheckSeekAVI_XINE( CvCaptureAVI_XINE* )", "illegal capture->vo_port");
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvCheckSeekAVI_XINE ... start\n" );
#endif
// temp. frame for testing.
xine_video_frame_t tmp;
// try to seek to a future frame...
xine_play( capture->stream, 0, 300 ); /* 300msec */
// try to receive the frame...
xine_get_next_video_frame( capture->vo_port, &tmp );
// if the framenumber is still 0, we can't use the xine seek functionality
capture->seekable = ( tmp.frame_number != 0 );
// reset stream
xine_play( capture->stream, 0, 0 );
// release xine_frame
xine_free_video_frame( capture->vo_port, &tmp );
#ifndef NDEBUG
if ( capture->seekable )
fprintf( stderr, "(DEBUG) icvCheckSeekAVI_XINE: Input is seekable, using XINE seek implementation.\n" );
else
fprintf( stderr, "(DEBUG) icvCheckSeekAVI_XINE: Input is NOT seekable, using fallback function.\n" );
fprintf( stderr, "(DEBUG) icvCheckSeekAVI_XINE ... end\n" );
#endif
}
static int icvOpenAVI_XINE( CvCaptureAVI_XINE* capture, const char* filename )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOpenAVI_XINE ... start\n" );
#endif
char configfile[ 2048 ];
capture->xine = xine_new();
sprintf( configfile, "%s%s", xine_get_homedir(), "/.xine/config" );
xine_config_load( capture->xine, configfile );
xine_init( capture->xine );
xine_engine_set_param( capture->xine, 0, 0 );
capture->vo_port = xine_new_framegrab_video_port( capture->xine );
if ( capture->vo_port == NULL )
{
printf( "(ERROR)icvOpenAVI_XINE(): Unable to initialize video driver.\n" );
return 0;
}
capture->stream = xine_stream_new( capture->xine, NULL, capture->vo_port );
if ( !xine_open( capture->stream, filename ) )
{
printf( "(ERROR)icvOpenAVI_XINE(): Unable to open source '%s'\n", filename );
return 0;
}
// reset stream...
xine_play( capture->stream, 0, 0 );
// initialize some internals...
capture->frame_number = 0;
if ( !xine_get_next_video_frame( capture->vo_port, &capture->xine_frame ) )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOpenAVI_XINE ... failed!\n" );
#endif
return 0;
}
capture->size = cvSize( capture->xine_frame.width, capture->xine_frame.height );
capture->yuv_frame = cvCreateImage( capture->size, IPL_DEPTH_8U, 3 );
capture->bgr_frame = cvCreateImage( capture->size, IPL_DEPTH_8U, 3 );
xine_free_video_frame( capture->vo_port, &capture->xine_frame );
capture->xine_frame.data[ 0 ] = 0;
icvCheckSeekAVI_XINE( capture );
capture->frame_duration = xine_get_stream_info( capture->stream, XINE_STREAM_INFO_FRAME_DURATION ) / 90.;
capture->frame_rate = 1000 / capture->frame_duration;
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) frame_duration = %f, framerate = %f\n", capture->frame_duration, capture->frame_rate );
#endif
OPENCV_ASSERT ( capture->yuv_frame,
"icvOpenAVI_XINE( CvCaptureAVI_XINE *, const char *)", "couldn't create yuv frame");
OPENCV_ASSERT ( capture->bgr_frame,
"icvOpenAVI_XINE( CvCaptureAVI_XINE *, const char *)", "couldn't create bgr frame");
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOpenAVI_XINE ... end\n" );
#endif
return 1;
}
static int icvGrabFrameAVI_XINE( CvCaptureAVI_XINE* capture )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvGrabFrameAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvGrabFrameAVI_XINE( CvCaptureAVI_XINE * )", "illegal capture");
OPENCV_ASSERT ( capture->vo_port,
"icvGrabFrameAVI_XINE( CvCaptureAVI_XINE * )", "illegal capture->vo_port");
int res = xine_get_next_video_frame( capture->vo_port, &capture->xine_frame );
/* always keep internal framenumber updated !!! */
if ( res ) capture->frame_number++;
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvGrabFrameAVI_XINE ... end\n" );
#endif
return res;
}
static const IplImage* icvRetrieveFrameAVI_XINE( CvCaptureAVI_XINE* capture, int )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvRetrieveFrameAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvRetrieveFrameAVI_XINE( CvCaptureAVI_XINE * )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvRetrieveFrameAVI_XINE( CvCaptureAVI_XINE * )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvRetrieveFrameAVI_XINE( CvCaptureAVI_XINE * )", "illegal capture->vo_port");
/* no frame grabbed yet? so let's do it now! */
int res = 0;
if ( capture->xine_frame.data == 0 )
{
res = icvGrabFrameAVI_XINE( capture );
}
else
{
res = 1;
}
if ( res )
{
switch ( capture->xine_frame.colorspace )
{
case XINE_IMGFMT_YV12: icvYV12toBGR( capture );
#ifndef NDEBUG
printf( "(DEBUG)icvRetrieveFrameAVI_XINE: converted YV12 to BGR.\n" );
#endif
break;
case XINE_IMGFMT_YUY2: icvYUY2toBGR( capture );
#ifndef NDEBUG
printf( "(DEBUG)icvRetrieveFrameAVI_XINE: converted YUY2 to BGR.\n" );
#endif
break;
case XINE_IMGFMT_XVMC: printf( "(ERROR)icvRetrieveFrameAVI_XINE: XVMC format not supported!\n" );
break;
case XINE_IMGFMT_XXMC: printf( "(ERROR)icvRetrieveFrameAVI_XINE: XXMC format not supported!\n" );
break;
default: printf( "(ERROR)icvRetrieveFrameAVI_XINE: unknown color/pixel format!\n" );
}
/* always release last xine_frame, not needed anymore, but store its frame_number in *capture ! */
xine_free_video_frame( capture->vo_port, &capture->xine_frame );
capture->xine_frame.data = 0;
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvRetrieveFrameAVI_XINE ... end\n" );
#endif
return capture->bgr_frame;
}
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvRetrieveFrameAVI_XINE ... failed!\n" );
#endif
return 0;
}
/**
* THIS FUNCTION IS A FALLBACK FUNCTION FOR THE CASE THAT THE XINE SEEK IMPLEMENTATION
* DOESN'T WORK WITH THE ACTUAL INPUT. THIS FUNCTION IS ONLY USED IN THE CASE OF AN EMERGENCY,
* BECAUSE IT IS VERY SLOW !
**/
static int icvOldSeekFrameAVI_XINE( CvCaptureAVI_XINE* capture, int f )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOldSeekFrameAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvRetricvOldSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvOldSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvOldSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->vo_port");
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream ) return 0;
// no need to seek if we are already there...
if ( f == capture->frame_number )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOldSeekFrameAVI_XINE ... end\n" );
#endif
return 1;
}
// if the requested position is behind out actual position,
// we just need to read the remaining amount of frames until we are there.
else if ( f > capture->frame_number )
{
for ( ;capture->frame_number < f;capture->frame_number++ )
/// un-increment framenumber grabbing failed
if ( !xine_get_next_video_frame( capture->vo_port, &capture->xine_frame ) )
{
capture->frame_number--;
break;
}
else
{
xine_free_video_frame( capture->vo_port, &capture->xine_frame );
}
}
// otherwise we need to reset the stream and
// start reading frames from the beginning.
else // f < capture->frame_number
{
/// reset stream, should also work with non-seekable input
xine_play( capture->stream, 0, 0 );
/// read frames until we are at the requested frame
for ( capture->frame_number = 0; capture->frame_number < f; capture->frame_number++ )
/// un-increment last framenumber if grabbing failed
if ( !xine_get_next_video_frame( capture->vo_port, &capture->xine_frame ) )
{
capture->frame_number--;
break;
}
else
{
xine_free_video_frame( capture->vo_port, &capture->xine_frame );
}
}
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvOldSeekFrameAVI_XINE ... end\n" );
#endif
return ( f == capture->frame_number ) ? 1 : 0;
}
static int icvSeekFrameAVI_XINE( CvCaptureAVI_XINE* capture, int f )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvSeekFrameAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->vo_port");
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream ) return 0;
if ( capture->seekable )
{
/// use xinelib's seek functionality
int new_time = ( int ) ( ( f + 1 ) * ( float ) capture->frame_duration );
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) calling xine_play()" );
#endif
if ( xine_play( capture->stream, 0, new_time ) )
{
#ifndef NDEBUG
fprintf( stderr, "ok\n" );
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... end\n" );
#endif
capture->frame_number = f;
return 1;
}
else
{
#ifndef NDEBUG
fprintf( stderr, "failed\n" );
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... failed\n" );
#endif
return 0;
}
}
else
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... end\n" );
#endif
return icvOldSeekFrameAVI_XINE( capture, f );
}
}
static int icvSeekTimeAVI_XINE( CvCaptureAVI_XINE* capture, int t )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekTimeAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvSeekTimeAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvSeekTimeAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvSeekTimeAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->vo_port");
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekTimeAVI_XINE ... start\n" );
#endif
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream ) return 0;
if ( capture->seekable )
{
/// use xinelib's seek functionality
if ( xine_play( capture->stream, 0, t ) )
{
capture->frame_number = ( int ) ( ( float ) t * capture->frame_rate / 1000 );
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... end\n" );
#endif
return 1;
}
else
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ... failed!\n" );
#endif
return 0;
}
}
else
{
int new_frame = ( int ) ( ( float ) t * capture->frame_rate / 1000 );
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekFrameAVI_XINE ....end\n" );
#endif
return icvOldSeekFrameAVI_XINE( capture, new_frame );
}
}
static int icvSeekRatioAVI_XINE( CvCaptureAVI_XINE* capture, double ratio )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekRatioAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvSeekRatioAVI_XINE( CvCaptureAVI_XINE *, double )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvSeekRatioAVI_XINE( CvCaptureAVI_XINE *, double )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvSeekRatioAVI_XINE( CvCaptureAVI_XINE *, double )", "illegal capture->vo_port");
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream ) return 0;
/// ratio must be [0..1]
if ( ratio > 1 || ratio < 0 ) return 0;
if ( capture->seekable )
{
// TODO: FIX IT, DOESN'T WORK PROPERLY, YET...!
int pos_t, pos_l, length;
xine_get_pos_length( capture->stream, &pos_l, &pos_t, &length );
fprintf( stderr, "ratio on GetProperty(): %d\n", pos_l );
/// use xinelib's seek functionality
if ( xine_play( capture->stream, (int)(ratio*(float)length), 0 ) )
{
capture->frame_number = ( int ) ( ratio*length / capture->frame_duration );
}
else
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekRatioAVI_XINE ... failed!\n" );
#endif
return 0;
}
}
else
{
/// TODO: fill it !
fprintf( stderr, "icvSeekRatioAVI_XINE(): Seek not supported by stream !\n" );
fprintf( stderr, "icvSeekRatioAVI_XINE(): (seek in stream with NO seek support NOT implemented...yet!)\n" );
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekRatioAVI_XINE ... failed!\n" );
#endif
return 0;
}
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSeekRatioAVI_XINE ... end!\n" );
#endif
return 1;
}
static double icvGetPropertyAVI_XINE( CvCaptureAVI_XINE* capture, int property_id )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvGetPropertyAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvGetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvGetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvGetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->vo_port");
OPENCV_ASSERT ( capture->xine,
"icvGetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->xine");
OPENCV_ASSERT ( capture->bgr_frame,
"icvGetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->bgr_frame");
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream || !capture->bgr_frame || !capture->xine || !capture->vo_port ) return 0
int pos_t, pos_l, length;
xine_get_pos_length( capture->stream, &pos_l, &pos_t, &length );
fprintf( stderr, "ratio on GetProperty(): %i\n", pos_l );
switch ( property_id )
{
/// return actual position in msec
case CV_CAP_PROP_POS_MSEC:
if ( !capture->seekable )
{
fprintf( stderr, "(ERROR) GetPropertyAVI_XINE(CV_CAP_PROP_POS_MSEC:\n" );
fprintf( stderr, " Stream is NOT seekable, so position info may NOT be valid !!\n" );
}
return pos_t;
/// return actual frame number
case CV_CAP_PROP_POS_FRAMES:
/// we insist the capture->frame_number to be remain updated !!!!
return capture->frame_number;
/// return actual position ratio in the range [0..1] depending on
/// the total length of the stream and the actual position
case CV_CAP_PROP_POS_AVI_RATIO:
if ( !capture->seekable )
{
fprintf( stderr, "(ERROR) GetPropertyAVI_XINE(CV_CAP_PROP_POS_AVI_RATIO:\n" );
fprintf( stderr, " Stream is NOT seekable, so ratio info may NOT be valid !!\n" );
}
if ( length == 0 ) break;
else return pos_l / 65535;
/// return width of image source
case CV_CAP_PROP_FRAME_WIDTH:
return capture->size.width;
/// return height of image source
case CV_CAP_PROP_FRAME_HEIGHT:
return capture->size.height;
/// return framerate of stream
case CV_CAP_PROP_FPS:
if ( !capture->seekable )
{
fprintf( stderr, "(ERROR) GetPropertyAVI_XINE(CV_CAP_PROP_FPS:\n" );
fprintf( stderr, " Stream is NOT seekable, so FPS info may NOT be valid !!\n" );
}
return capture->frame_rate;
/// return four-character-code (FOURCC) of source's codec
case CV_CAP_PROP_FOURCC:
return ( double ) xine_get_stream_info( capture->stream, XINE_STREAM_INFO_VIDEO_FOURCC );
}
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvGetPropertyAVI_XINE ... failed!\n" );
#endif
return 0;
}
static int icvSetPropertyAVI_XINE( CvCaptureAVI_XINE* capture,
int property_id, double value )
{
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSetPropertyAVI_XINE ... start\n" );
#endif
OPENCV_ASSERT ( capture,
"icvSetPropertyAVI_XINE( CvCaptureAVI_XINE *, int, double )", "illegal capture");
OPENCV_ASSERT ( capture->stream,
"icvGetPropericvSetPropertyAVI_XINE( CvCaptureAVI_XINE *, int )", "illegal capture->stream");
OPENCV_ASSERT ( capture->vo_port,
"icvSetPropertyAVI_XINE( CvCaptureAVI_XINE *, int, double )", "illegal capture->vo_port");
// not needed tnx to asserts...
// we need a valid capture context and it's stream to seek through
// if ( !capture || !capture->stream || !capture->bgr_frame || !capture->xine || !capture->vo_port ) return 0
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSetPropertyAVI_XINE: seeking to value %f ... ", value );
#endif
switch ( property_id )
{
/// set (seek to) position in msec
case CV_CAP_PROP_POS_MSEC:
return icvSeekTimeAVI_XINE( capture, ( int ) value );
/// set (seek to) frame number
case CV_CAP_PROP_POS_FRAMES:
return icvSeekFrameAVI_XINE( capture, ( int ) value );
/// set (seek to) position ratio in the range [0..1] depending on
/// the total length of the stream and the actual position
case CV_CAP_PROP_POS_AVI_RATIO:
return icvSeekRatioAVI_XINE( capture, value );
default:
#ifndef NDEBUG
fprintf( stderr, "(DEBUG) icvSetPropertyAVI_XINE ... failed!\n" );
#endif
return 0;
}
}
static CvCaptureAVI_XINE* icvCaptureFromFile_XINE( const char* filename )
{
// construct capture struct
CvCaptureAVI_XINE * capture = ( CvCaptureAVI_XINE* ) cvAlloc ( sizeof ( CvCaptureAVI_XINE ) );
memset( capture, 0, sizeof ( CvCaptureAVI_XINE ) );
// initialize XINE
if ( !icvOpenAVI_XINE( capture, filename ) )
return 0;
OPENCV_ASSERT ( capture,
"cvCaptureFromFile_XINE( const char * )", "couldn't create capture");
return capture;
}
class CvCaptureAVI_XINE_CPP : public CvCapture
{
public:
CvCaptureAVI_XINE_CPP() { captureXINE = 0; }
virtual ~CvCaptureAVI_XINE_CPP() { close(); }
virtual bool open( const char* filename );
virtual void close();
virtual double getProperty(int);
virtual bool setProperty(int, double);
virtual bool grabFrame();
virtual IplImage* retrieveFrame(int);
protected:
CvCaptureAVI_XINE* captureXINE;
};
bool CvCaptureAVI_XINE_CPP::open( const char* filename )
{
close();
captureXINE = icvCaptureFromFile_XINE(filename);
return captureXINE != 0;
}
void CvCaptureAVI_XINE_CPP::close()
{
if( captureXINE )
{
icvCloseAVI_XINE( captureXINE );
cvFree( &captureXINE );
}
}
bool CvCaptureAVI_XINE_CPP::grabFrame()
{
return captureXINE ? icvGrabFrameAVI_XINE( captureXINE ) != 0 : false;
}
IplImage* CvCaptureAVI_XINE_CPP::retrieveFrame(int)
{
return captureXINE ? (IplImage*)icvRetrieveFrameAVI_XINE( captureXINE, 0 ) : 0;
}
double CvCaptureAVI_XINE_CPP::getProperty( int propId )
{
return captureXINE ? icvGetPropertyAVI_XINE( captureXINE, propId ) : 0;
}
bool CvCaptureAVI_XINE_CPP::setProperty( int propId, double value )
{
return captureXINE ? icvSetPropertyAVI_XINE( captureXINE, propId, value ) != 0 : false;
}
CvCapture* cvCreateFileCapture_XINE(const char* filename)
{
CvCaptureAVI_XINE_CPP* capture = new CvCaptureAVI_XINE_CPP;
if( capture->open(filename))
return capture;
delete capture;
return 0;
}
#undef NDEBUG
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