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iotechdaqx: Initial commit

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Element works, but not configurable or thoroughly tested.
This commit is contained in:
Joshua M. Doe 2011-04-12 15:28:38 -04:00
parent 390ad794e0
commit f3084e002e
6 changed files with 636 additions and 0 deletions
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1
CMakeLists.txt
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@ -10,6 +10,7 @@ find_package (NIIMAQ)
find_package (FreeImage)
find_package (OpenCV)
find_package (Euresys)
find_package (IOtechDaqX)
# conditional required packages
include (CheckIncludeFiles)

49
cmake/modules/FindIOtechDaqX.cmake Normal file
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@ -0,0 +1,49 @@
# - Try to find IOtech DaqX SDK
# Once done this will define
#
# IOTECHDAQX_FOUND - system has IOtech DaqX SDK
# IOTECHDAQX_INCLUDE_DIR - the IOtech DaqX SDK include directory
# IOTECHDAQX_LIBRARIES - the libraries needed to use IOtech DaqX
# Copyright (c) 2006, Tim Beaulen <tbscope@gmail.com>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
IF (IOTECHDAQX_INCLUDE_DIR AND IOTECHDAQX_LIBRARIES)
# in cache already
SET(IOTECHDAQX_FIND_QUIETLY TRUE)
ELSE (IOTECHDAQX_INCLUDE_DIR AND IOTECHDAQX_LIBRARIES)
SET(IOTECHDAQX_FIND_QUIETLY FALSE)
ENDIF (IOTECHDAQX_INCLUDE_DIR AND IOTECHDAQX_LIBRARIES)
IF (NOT IOTECHDAQX_DIR)
SET (IOTECHDAQX_DIR "C:/Program Files/DaqX" CACHE PATH "Directory containing IOtech DaqX")
ENDIF (NOT IOTECHDAQX_DIR)
FIND_PATH (IOTECHDAQX_INCLUDE_DIR DAQX.H
PATHS
"${IOTECHDAQX_DIR}/Programming Language Support/WaveBook/C/32-bit Enhanced API"
DOC "Directory containing DAQX.H include file")
FIND_LIBRARY (IOTECHDAQX_LIBRARIES NAMES DAQX
PATHS
"${IOTECHDAQX_DIR}/Programming Language Support/WaveBook/C/32-bit Enhanced API"
DOC "IOTECHDAQX library to link with")
IF (IOTECHDAQX_INCLUDE_DIR)
#MESSAGE(STATUS "DEBUG: Found IOtech DaqX include dir: ${IOTECHDAQX_INCLUDE_DIR}")
ELSE (IOTECHDAQX_INCLUDE_DIR)
MESSAGE(STATUS "IOTECHDAQX: WARNING: include dir not found")
ENDIF (IOTECHDAQX_INCLUDE_DIR)
IF (IOTECHDAQX_LIBRARIES)
#MESSAGE(STATUS "DEBUG: Found IOtech DaqX library: ${IOTECHDAQX_LIBRARIES}")
ELSE (IOTECHDAQX_LIBRARIES)
MESSAGE(STATUS "IOTECHDAQX: WARNING: library not found")
ENDIF (IOTECHDAQX_LIBRARIES)
INCLUDE (FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS (IOTECHDAQX DEFAULT_MSG IOTECHDAQX_INCLUDE_DIR IOTECHDAQX_LIBRARIES)
MARK_AS_ADVANCED(IOTECHDAQX_INCLUDE_DIR IOTECHDAQX_LIBRARIES)

1
sys/CMakeLists.txt
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@ -1,2 +1,3 @@
add_subdirectory (euresys)
add_subdirectory (niimaq)
add_subdirectory (iotechdaqx)

26
sys/iotechdaqx/CMakeLists.txt Normal file
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@ -0,0 +1,26 @@
add_definitions(-DHAVE_CONFIG_H)
set ( SOURCES
gstiotechdaqx.c )
set ( HEADERS
gstiotechdaqx.h )
include_directories ( AFTER
.
${WAVEBOOK_INCLUDE_DIR} )
add_library ( libgstiotechdaqx MODULE
${SOURCES}
${HEADERS} )
target_link_libraries ( libgstiotechdaqx
${GLIB2_LIBRARIES}
${GSTREAMER_LIBRARIES}
${GSTREAMER_BASE_LIBRARY}
${GSTREAMER_INTERFACE_LIBRARY}
${GSTREAMER_VIDEO_LIBRARY}
${IOTECHDAQX_LIBRARIES})
install (TARGETS libgstiotechdaqx
LIBRARY DESTINATION lib/gstreamer-0.10)

493
sys/iotechdaqx/gstiotechdaqx.c Normal file
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@ -0,0 +1,493 @@
/* GStreamer
* Copyright (C) 2011 FIXME <fixme@example.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstiotechdaqx
*
* The iotechdaqx element is a source for data acquisition devices supported by the IOtechDaqX driver.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v iotechdaqx ! FIXME
* ]|
* FIXME from the default IOtechDaqX device
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst-i18n-lib.h>
#include <gst\audio\audio.h>
#include "gstiotechdaqx.h"
#define NULL 0
GST_DEBUG_CATEGORY_STATIC (gst_iotechdaqx_debug);
#define GST_CAT_DEFAULT gst_iotechdaqx_debug
/* prototypes */
static void gst_iotechdaqx_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_iotechdaqx_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_iotechdaqx_dispose (GObject * object);
static void gst_iotechdaqx_finalize (GObject * object);
static GstCaps *gst_iotechdaqx_get_caps (GstBaseSrc * src);
static gboolean gst_iotechdaqx_set_caps (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_iotechdaqx_newsegment (GstBaseSrc * src);
static gboolean gst_iotechdaqx_start (GstBaseSrc * src);
static gboolean gst_iotechdaqx_stop (GstBaseSrc * src);
static void
gst_iotechdaqx_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static gboolean gst_iotechdaqx_get_size (GstBaseSrc * src, guint64 * size);
static gboolean gst_iotechdaqx_is_seekable (GstBaseSrc * src);
static gboolean gst_iotechdaqx_query (GstBaseSrc * src, GstQuery * query);
static gboolean gst_iotechdaqx_check_get_range (GstBaseSrc * src);
static void gst_iotechdaqx_fixate (GstBaseSrc * src, GstCaps * caps);
static GstFlowReturn gst_iotechdaqx_create (GstPushSrc * src, GstBuffer ** buf);
enum
{
PROP_0,
PROP_BOARD_INDEX
/* FILL ME */
};
#define DEFAULT_PROP_BOARD_INDEX 0
/* pad templates */
static GstStaticPadTemplate gst_iotechdaqx_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
//GST_AUDIO_INT_PAD_TEMPLATE_CAPS)
"audio/x-raw-int, " \
"rate = (int) 10000, " \
"channels = (int) 1, " \
"endianness = (int) BYTE_ORDER, " \
"width = (int) 16, " \
"depth = (int) 16, " \
"signed = (boolean) true")
);
/* class initialization */
GST_BOILERPLATE (GstIOtechDaqX, gst_iotechdaqx, GstPushSrc,
GST_TYPE_PUSH_SRC);
char* GetProtocol(DaqProtocol protocol){
/*This function is used to display the protcol name; since the
protcol itself is stored as a number, this function associates
the protocol number with a string.
*/
char* protocolName[64];
switch (protocol)
{
case DaqProtocolNone: *protocolName="DaqProtocolNone";break;
case DaqProtocol4: *protocolName="DaqProtocol4";break;
case DaqProtocol8: *protocolName="DaqProtocol8";break;
case DaqProtocolSMC666: *protocolName="DaqProtocolSMC666";break;
case DaqProtocolFastEPP: *protocolName="DaqProtocolFastEPP";break;
case DaqProtocolECP: *protocolName="DaqProtocolECP";break;
case DaqProtocol8BitEPP: *protocolName="DaqProtocol8BitEPP";break;
case DaqProtocolTCPIP: *protocolName="DaqProtocolTCPIP";break;
case DaqProtocolISA: *protocolName="DaqProtocolISA";break;
case DaqProtocolPcCard: *protocolName="DaqProtocolPcCard";break;
case DaqProtocolUSB: *protocolName="DaqProtocolUSB";break;
case DaqProtocolPCI: *protocolName="DaqProtocolPCI";break;
case DaqProtocolCPCI: *protocolName="DaqProtocolCPCI";break;
default: *protocolName="Unknown";break;
}
return *protocolName;
}
static void
gst_iotechdaqx_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_iotechdaqx_src_template));
gst_element_class_set_details_simple (element_class,
"IOtechDaqX Data Source", "Source/Audio",
"IOtechDaqX data source",
"Joshua Doe <oss@nvl.army.mil>");
}
static void
gst_iotechdaqx_class_init (GstIOtechDaqXClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);
GstPushSrcClass *push_src_class = GST_PUSH_SRC_CLASS (klass);
gobject_class->set_property = gst_iotechdaqx_set_property;
gobject_class->get_property = gst_iotechdaqx_get_property;
gobject_class->dispose = gst_iotechdaqx_dispose;
gobject_class->finalize = gst_iotechdaqx_finalize;
base_src_class->get_caps = GST_DEBUG_FUNCPTR (gst_iotechdaqx_get_caps);
base_src_class->set_caps = GST_DEBUG_FUNCPTR (gst_iotechdaqx_set_caps);
base_src_class->newsegment = GST_DEBUG_FUNCPTR (gst_iotechdaqx_newsegment);
base_src_class->start = GST_DEBUG_FUNCPTR (gst_iotechdaqx_start);
base_src_class->stop = GST_DEBUG_FUNCPTR (gst_iotechdaqx_stop);
base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_iotechdaqx_get_times);
base_src_class->get_size = GST_DEBUG_FUNCPTR (gst_iotechdaqx_get_size);
base_src_class->is_seekable = GST_DEBUG_FUNCPTR (gst_iotechdaqx_is_seekable);
base_src_class->query = GST_DEBUG_FUNCPTR (gst_iotechdaqx_query);
base_src_class->check_get_range = GST_DEBUG_FUNCPTR (gst_iotechdaqx_check_get_range);
base_src_class->fixate = GST_DEBUG_FUNCPTR (gst_iotechdaqx_fixate);
push_src_class->create = GST_DEBUG_FUNCPTR (gst_iotechdaqx_create);
/* Install GObject properties */
//g_object_class_install_property (gobject_class, PROP_BOARD_INDEX,
// g_param_spec_int ("board", "Board", "Index of board connected to camera",
// 0, 15, DEFAULT_PROP_BOARD_INDEX, G_PARAM_READWRITE));
}
static void
gst_iotechdaqx_init (GstIOtechDaqX * iotechdaqx, GstIOtechDaqXClass * iotechdaqx_class)
{
iotechdaqx->srcpad = gst_pad_new_from_static_template (&gst_iotechdaqx_src_template
, "src");
/* set source as live (no preroll) */
gst_base_src_set_live (GST_BASE_SRC (iotechdaqx), TRUE);
/* override default of BYTES to operate in time mode */
gst_base_src_set_format (GST_BASE_SRC (iotechdaqx), GST_FORMAT_TIME);
/* initialize member variables */
iotechdaqx->caps = NULL;
iotechdaqx->handle = -1;
iotechdaqx->opened = FALSE;
// FIXME: initialize ALL member variables
}
void
gst_iotechdaqx_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstIOtechDaqX *iotechdaqx;
g_return_if_fail (GST_IS_IOTECHDAQX (object));
iotechdaqx = GST_IOTECHDAQX (object);
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_iotechdaqx_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstIOtechDaqX *iotechdaqx;
g_return_if_fail (GST_IS_IOTECHDAQX (object));
iotechdaqx = GST_IOTECHDAQX (object);
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_iotechdaqx_dispose (GObject * object)
{
GstIOtechDaqX *iotechdaqx;
g_return_if_fail (GST_IS_IOTECHDAQX (object));
iotechdaqx = GST_IOTECHDAQX (object);
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_iotechdaqx_finalize (GObject * object)
{
GstIOtechDaqX *iotechdaqx;
g_return_if_fail (GST_IS_IOTECHDAQX (object));
iotechdaqx = GST_IOTECHDAQX (object);
/* clean up object here */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_iotechdaqx_get_caps (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "get_caps");
/* return template caps if we don't know the actual camera caps */
if (!iotechdaqx->caps) {
return gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (iotechdaqx)));
}
return gst_caps_copy (iotechdaqx->caps);
return NULL;
}
static gboolean
gst_iotechdaqx_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GstStructure *structure;
gboolean ret;
GST_DEBUG_OBJECT (iotechdaqx, "set_caps");
if (iotechdaqx->caps) {
gst_caps_unref (iotechdaqx->caps);
iotechdaqx->caps = gst_caps_copy (caps);
}
/* parse caps */
if (gst_caps_get_size (caps) < 1)
return FALSE;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get (structure,
"width", G_TYPE_INT, &iotechdaqx->width,
"rate", G_TYPE_INT, &iotechdaqx->rate,
"channels", G_TYPE_INT, &iotechdaqx->channels,
NULL);
if (!ret) {
GST_DEBUG ("Failed to retrieve width and height");
return FALSE;
}
return TRUE;
}
static gboolean
gst_iotechdaqx_newsegment (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "newsegment");
return TRUE;
}
static gboolean
gst_iotechdaqx_start (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
DaqDeviceListT *devList;
DaqDevicePropsT devProps;
DWORD devCount, deviceIndex;
GST_DEBUG_OBJECT (iotechdaqx, "start");
// Find out how many devices are installed and allocate memory for device list
daqGetDeviceCount(&devCount);
devList = (DaqDeviceListT*)malloc(sizeof(DaqDeviceListT)*devCount);
GST_DEBUG ("Found %d devices", devCount);
// Get the names of all installed devices and the device count
daqGetDeviceList(devList, &devCount);
deviceIndex = 0;
do {
// Get the device properties for each device
daqGetDeviceProperties(devList[deviceIndex].daqName, &devProps);
GST_DEBUG ("Device %i: %s", deviceIndex, devList[deviceIndex].daqName);
deviceIndex++;
// Loop until a WaveBook is found or all the devices have been searched
} while (deviceIndex < devCount);
// We are done with the device list
free(devList);
iotechdaqx->handle = daqOpen(devProps.daqName);
GST_DEBUG ("Connected to %s on LPT%d\n", devProps.daqName, devProps.basePortAddress+1);
GST_DEBUG ("Protocol: %s \n", GetProtocol(devProps.protocol));
//FIXME check for errors!
return TRUE;
}
static gboolean
gst_iotechdaqx_stop (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "stop");
/* Stop the acquisition */
daqAdcTransferStop (iotechdaqx->handle);
daqClose (iotechdaqx->handle);
gst_caps_unref (iotechdaqx->caps);
iotechdaqx->caps = NULL;
iotechdaqx->opened = FALSE;
return TRUE;
}
static void
gst_iotechdaqx_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
//GST_DEBUG_OBJECT (iotechdaqx, "get_times");
}
static gboolean
gst_iotechdaqx_get_size (GstBaseSrc * src, guint64 * size)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "get_size");
return TRUE;
}
static gboolean
gst_iotechdaqx_is_seekable (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "is_seekable");
return FALSE;
}
static gboolean
gst_iotechdaqx_query (GstBaseSrc * src, GstQuery * query)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "query");
return TRUE;
}
static gboolean
gst_iotechdaqx_check_get_range (GstBaseSrc * src)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "get_range");
return FALSE;
}
static void
gst_iotechdaqx_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
GST_DEBUG_OBJECT (iotechdaqx, "fixate");
}
static GstFlowReturn
gst_iotechdaqx_create (GstPushSrc * src, GstBuffer ** buf)
{
GstIOtechDaqX *iotechdaqx = GST_IOTECHDAQX (src);
DWORD retCount;
//GST_DEBUG ("create (handle=%d)", iotechdaqx->handle);
if (!iotechdaqx->opened) {
DWORD channels[1] = {1};
DaqAdcGain gains[1] = {DgainX1};
DWORD flags[1] = {DafAnalog|DafBipolar};
GST_DEBUG ("Setting up acquisition: rate=%d", iotechdaqx->rate);
daqAdcSetScan (iotechdaqx->handle, channels, gains, flags, 1);
daqAdcSetAcq (iotechdaqx->handle, DaamInfinitePost, 0, 0);
daqSetTriggerEvent (iotechdaqx->handle, DatsSoftware, NULL, NULL, NULL, NULL, NULL, NULL, NULL, DaqStartEvent);
//daqSetTriggerEvent (iotechdaqx->handle, DatsSoftware, NULL, NULL, NULL, NULL, NULL, NULL, NULL, DaqStopEvent);
daqAdcSetFreq (iotechdaqx->handle, (float)iotechdaqx->rate);
daqAdcTransferSetBuffer (iotechdaqx->handle, NULL, 44100, DatmCycleOn|DatmDriverBuf);
daqAdcTransferStart (iotechdaqx->handle);
daqAdcArm (iotechdaqx->handle);
daqAdcSoftTrig (iotechdaqx->handle); //FIXME: put in create() and use has_started flag
iotechdaqx->opened = TRUE;
}
gst_pad_alloc_buffer_and_set_caps (GST_BASE_SRC_PAD (GST_BASE_SRC (src)), 0, 2048*2, iotechdaqx->caps, buf);
daqAdcTransferBufData (iotechdaqx->handle, GST_BUFFER_DATA(*buf), 2048, DabtmOldest|DabtmWait, &retCount);
//GST_DEBUG ("Asked for %d samples, got %d", 2048, retCount);
//memcpy(GST_BUFFER_DATA (*buf), tmp, 16*sizeof(SHORT));
return GST_FLOW_OK;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_iotechdaqx_debug, "iotechdaqx", 0, \
"debug category for iotechdaqx element");
gst_element_register (plugin, "iotechdaqx", GST_RANK_NONE,
gst_iotechdaqx_get_type ());
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"iotechdaqx",
"IOtechDaqX source",
plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)

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sys/iotechdaqx/gstiotechdaqx.h Normal file
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/* GStreamer
* Copyright (C) 2011 FIXME <fixme@example.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _GST_IOTECHDAQX_H_
#define _GST_IOTECHDAQX_H_
#include <gst/base/gstpushsrc.h>
#include <windows.h>
#include <DAQX.h>
G_BEGIN_DECLS
#define GST_TYPE_IOTECHDAQX (gst_iotechdaqx_get_type())
#define GST_IOTECHDAQX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IOTECHDAQX,GstIOtechDaqX))
#define GST_IOTECHDAQX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IOTECHDAQX,GstIOtechDaqXClass))
#define GST_IS_IOTECHDAQX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IOTECHDAQX))
#define GST_IS_IOTECHDAQX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IOTECHDAQX))
typedef struct _GstIOtechDaqX GstIOtechDaqX;
typedef struct _GstIOtechDaqXClass GstIOtechDaqXClass;
struct _GstIOtechDaqX
{
GstPushSrc base_iotechdaqx;
GstPad *srcpad;
GstCaps *caps;
gint rate;
gint channels;
gint endianness;
gint width;
gint depth;
gboolean is_signed;
gboolean opened;
DaqHandleT handle;
};
struct _GstIOtechDaqXClass
{
GstPushSrcClass base_iotechdaqx_class;
};
GType gst_iotechdaqx_get_type (void);
G_END_DECLS
#endif