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From: Hartmut S. <ret...@us...> - 2006-06-30 04:38:45
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Update of /cvsroot/artoolkit/artoolkit/lib/SRC/VideoGStreamer In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv11247/lib/SRC/VideoGStreamer Added Files: Makefile.in video.c Log Message: added GStreamer support --- NEW FILE: Makefile.in --- # # For instalation. Change this to your settings. # INC_DIR = ../../../include LIB_DIR = ../.. # # compiler # CC=cc CFLAG= @CFLAG@ -I$(INC_DIR) # # For making the library # AR= ar ARFLAGS= @ARFLAG@ # # products # LIB= ${LIB_DIR}/libARvideo.a INCLUDE= ${INC_DIR}/AR/video.h # # compilation control # LIBOBJS= ${LIB}(video.o) \ ${LIB}(video2.o) all: ${LIBOBJS} ${LIBOBJS}: ${INCLUDE} .c.a: ${CC} -c ${CFLAG} $< ${AR} ${ARFLAGS} $@ $*.o rm -f $*.o clean: rm -f *.o rm -f ${LIB} allclean: rm -f *.o rm -f ${LIB} rm -f Makefile --- NEW FILE: video.c --- /* * Video capture module utilising the GStreamer pipeline for AR Toolkit * * (c) Copyrights 2003-2006 Hartmut Seichter * * licensed under the terms of the GPL v2.0 * */ /* include AR Toolkit*/ #include <AR/config.h> #include <AR/ar.h> #include <AR/video.h> /* include GLib for GStreamer */ #include <glib.h> /* include GStreamer itself */ #include <gst/gst.h> /* using memcpy */ #include <string.h> static AR2VideoParamT *gVid = 0; static gboolean cb_have_data (GstPad *pad, GstBuffer *buffer, gpointer u_data) { const GstCaps *caps; GstStructure *str; gint width,height; gdouble rate; AR2VideoParamT *vid = (AR2VideoParamT*)u_data; /* only do initialy for the buffer */ if (vid->videoBuffer == 0) { /* * Get the capabilities of the frame, we need that in order * to extract information about the frame */ caps=gst_pad_get_negotiated_caps(pad); str=gst_caps_get_structure(caps,0); /* Get some data about the frame */ gst_structure_get_int(str,"width",&width); gst_structure_get_int(str,"height",&height); gst_structure_get_double(str,"framerate",&rate); g_print("libARvideo: GStreamer negotiated %dx%d\n",width,height); vid->width = width; vid->height = height; /* allocate the buffer */ vid->videoBuffer = malloc(buffer->size); return TRUE; } else { /* copy the video buffer */ memcpy(vid->videoBuffer, buffer->data, buffer->size); } return TRUE; } int arVideoOpen( char *config ) { if( gVid != NULL ) { printf("Device has been opened!!\n"); return -1; } gVid = ar2VideoOpen( config ); if( gVid == NULL ) return -1; } int arVideoClose( void ) { return ar2VideoClose(gVid); } int arVideoDispOption( void ) { return 0; } int arVideoInqSize( int *x, int *y ) { ar2VideoInqSize(gVid,x,y); return 0; } ARUint8 *arVideoGetImage( void ) { return ar2VideoGetImage(gVid); // address of your image data } int arVideoCapStart( void ) { ar2VideoCapStart(gVid); return 0; } int arVideoCapStop( void ) { ar2VideoCapStop(gVid); return 0; } int arVideoCapNext( void ) { ar2VideoCapNext(gVid); return 0; } /*---------------------------------------------------------------------------*/ AR2VideoParamT* ar2VideoOpen(char *config ) { AR2VideoParamT *vid = 0; GError *error = 0; int i; GstPad *pad; GstXML *xml; /* initialise GStreamer */ gst_init(0,0); /* init ART structure */ arMalloc( vid, AR2VideoParamT, 1 ); /* initialise buffer */ vid->videoBuffer = 0; /* report the current version and features */ g_print ("libARvideo: %s\n", gst_version_string()); #if 0 xml = gst_xml_new(); /* first check if config contains an xml file */ if (gst_xml_parse_file(xml,config,NULL)) { /* parse the pipe definition */ } else { vid->pipeline = gst_xml_get_element(xml,"pipeline"); } #endif vid->pipeline = gst_parse_launch (config, &error); if (!vid->pipeline) { g_print ("Parse error: %s\n", error->message); return 0; }; /* get the video sink */ vid->probe = gst_bin_get_by_name(GST_BIN(vid->pipeline), "artoolkit"); if (!vid->probe) { g_print("Pipeline has no element named 'artoolkit'!\n"); return 0; }; /* get the pad from the probe (the source pad seems to be more flexible) */ pad = gst_element_get_pad (vid->probe, "src"); /* install the probe callback for capturing */ gst_pad_add_buffer_probe (pad, G_CALLBACK (cb_have_data), vid); /* dismiss the pad */ gst_object_unref (pad); /* request ready state */ gst_element_set_state (vid->pipeline, GST_STATE_READY); /* check if stream is ready */ if (gst_element_get_state (vid->pipeline, NULL, NULL, -1) == GST_STATE_CHANGE_FAILURE) { g_error ("libARvideo: failed to put GStreamer into READY state!\n"); } else { g_print ("libARvideo: GStreamer pipeline is READY!\n"); } /* Needed to fill the information for ARVidInfo */ gst_element_set_state (vid->pipeline, GST_STATE_PAUSED); /* wait until it's up and running or failed */ if (gst_element_get_state (vid->pipeline, NULL, NULL, -1) == GST_STATE_CHANGE_FAILURE) { g_error ("libARvideo: failed to put GStreamer into PAUSE state!\n"); } else { g_print ("libARvideo: GStreamer pipeline is PAUSED!\n"); } #if 0 /* write the bin to stdout */ gst_xml_write_file (GST_ELEMENT (vid->pipeline), stdout); #endif /* return the video handle */ return vid; }; int ar2VideoClose(AR2VideoParamT *vid) { /* stop the pipeline */ gst_element_set_state (vid->pipeline, GST_STATE_NULL); /* free the pipeline handle */ gst_object_unref (GST_OBJECT (vid->pipeline)); return 0; } ARUint8* ar2VideoGetImage(AR2VideoParamT *vid) { /* just return the bare video buffer */ return vid->videoBuffer; } int ar2VideoCapStart(AR2VideoParamT *vid) { GstStateChangeReturn _ret; /* set playing state of the pipeline */ _ret = gst_element_set_state (vid->pipeline, GST_STATE_PLAYING); if (_ret == GST_STATE_CHANGE_ASYNC) { /* wait until it's up and running or failed */ if (gst_element_get_state (vid->pipeline, NULL, NULL, GST_CLOCK_TIME_NONE) == GST_STATE_CHANGE_FAILURE) { g_error ("libARvideo: failed to put GStreamer into PLAYING state!\n"); return 0; } } return 1; } int ar2VideoCapStop(AR2VideoParamT *vid) { /* stop pipeline */ return gst_element_set_state (vid->pipeline, GST_STATE_NULL); } int ar2VideoCapNext(AR2VideoParamT *vid) { /* gstreamer should */ return TRUE; } int ar2VideoInqSize(AR2VideoParamT *vid, int *x, int *y ) { *x = vid->width; // width of your static image *y = vid->height; // height of your static image } |
