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qcamsrc: Initial commit of QImaging QCam video source

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This commit is contained in:
Joshua M. Doe 2021-01-19 13:32:47 -05:00
parent 01c65a2d18
commit c72458c918
6 changed files with 864 additions and 0 deletions
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3
CMakeLists.txt
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@ -108,6 +108,9 @@ macro_log_feature(Pleora_FOUND "Pleora eBUS" "Required to build Pleora eBUS sour
find_package(Pylon)
macro_log_feature(PYLON_FOUND "Basler Pylon" "Required to build Basler Pylon source element" "http://www.baslerweb.com/" FALSE)
find_package(QCam)
macro_log_feature(QCAM_FOUND "QImaging QCam" "Required to build QImaging QCam source element" "https://www.photometrics.com/qimaging" FALSE)
find_package(Sapera)
macro_log_feature(SAPERA_FOUND "Teledyne DALSA Sapera" "Required to build Teledyne DALSA Sapera source element" "http://www.teledynedalsa.com/" FALSE)

34
cmake/modules/FindQCam.cmake Normal file
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@ -0,0 +1,34 @@
# - Try to find QCam SDK
# Once done this will define
#
# QCAM_FOUND - system has QCam SDK
# QCAM_INCLUDE_DIR - the QCam SDK include directory
# QCAM_LIBRARIES - the libraries needed to use QCam SDK
# Copyright (c) 2006, Tim Beaulen <tbscope@gmail.com>
# Copyright (c) 2021 outside US, United States Government, Joshua M. Doe <oss@nvl.army.mil>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
if (NOT QCAM_DIR)
set (QCAM_DIR "C:/Program Files/QImaging/SDK" CACHE PATH "Directory containing QCam SDK includes and libraries")
endif ()
if (CMAKE_SIZEOF_VOID_P MATCHES "8")
set(_LIB_NAME "QCamDriverx64")
else ()
set(_LIB_NAME "QCamDriver")
endif ()
find_path (QCAM_INCLUDE_DIR QCamApi.h
PATHS
"${QCAM_DIR}/Headers"
DOC "Directory containing QCam API include files")
find_library (QCAM_LIBRARIES NAMES ${_LIB_NAME}
PATHS
"${QCAM_DIR}/libs/AMD64" "${QCAM_DIR}/libs/i386")
include (FindPackageHandleStandardArgs)
find_package_handle_standard_args (QCAM DEFAULT_MSG QCAM_INCLUDE_DIR QCAM_LIBRARIES)

4
sys/CMakeLists.txt
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@ -62,6 +62,10 @@ if (PYLON_FOUND)
add_subdirectory(pylon)
endif (PYLON_FOUND)
if (QCAM_FOUND)
add_subdirectory(qcam)
endif (QCAM_FOUND)
if (SAPERA_FOUND)
add_subdirectory(sapera)
endif (SAPERA_FOUND)

33
sys/qcam/CMakeLists.txt Normal file
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@ -0,0 +1,33 @@
set (SOURCES
gstqcamsrc.c)
set (HEADERS
gstqcamsrc.h)
include_directories (AFTER
${QCAM_INCLUDE_DIR}
)
set (libname gstqcam)
add_library (${libname} MODULE
${SOURCES}
${HEADERS})
set (LIBRARIES
${GLIB2_LIBRARIES}
${GOBJECT_LIBRARIES}
${GSTREAMER_LIBRARY}
${GSTREAMER_BASE_LIBRARY}
${GSTREAMER_VIDEO_LIBRARY}
${QCAM_LIBRARIES}
)
target_link_libraries (${libname}
${LIBRARIES}
)
if (WIN32)
install (FILES $<TARGET_PDB_FILE:${libname}> DESTINATION ${PDB_INSTALL_DIR} COMPONENT pdb OPTIONAL)
endif ()
install(TARGETS ${libname} LIBRARY DESTINATION ${PLUGIN_INSTALL_DIR})

713
sys/qcam/gstqcamsrc.c Normal file
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@ -0,0 +1,713 @@
/* GStreamer
* Copyright (C) 2021 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-gstqcamsrc
*
* The qcamsrc element is a source for QImaging QCam cameras like the Retiga 2000R
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v qcamsrc ! videoconvert ! autovideosink
* ]|
* Shows video from the default QCam device
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <gst/video/video.h>
#include "gstqcamsrc.h"
#include <QCamApi.h>
GST_DEBUG_CATEGORY_STATIC (gst_qcamsrc_debug);
#define GST_CAT_DEFAULT gst_qcamsrc_debug
/* prototypes */
static void gst_qcamsrc_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_qcamsrc_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_qcamsrc_dispose (GObject * object);
static void gst_qcamsrc_finalize (GObject * object);
static gboolean gst_qcamsrc_start (GstBaseSrc * src);
static gboolean gst_qcamsrc_stop (GstBaseSrc * src);
static GstCaps *gst_qcamsrc_get_caps (GstBaseSrc * src, GstCaps * filter);
static gboolean gst_qcamsrc_set_caps (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_qcamsrc_unlock (GstBaseSrc * src);
static gboolean gst_qcamsrc_unlock_stop (GstBaseSrc * src);
static GstFlowReturn gst_qcamsrc_create (GstPushSrc * src, GstBuffer ** buf);
static void gst_qcamsrc_frame_callback (void *userPtr, unsigned long userData,
QCam_Err errcode, unsigned long flags);
enum
{
PROP_0,
PROP_DEVICE_INDEX,
PROP_NUM_CAPTURE_BUFFERS,
PROP_TIMEOUT,
PROP_EXPOSURE,
PROP_GAIN,
PROP_OFFSET,
PROP_FORMAT
};
#define DEFAULT_PROP_DEVICE_INDEX 0
#define DEFAULT_PROP_NUM_CAPTURE_BUFFERS 3
#define DEFAULT_PROP_TIMEOUT 1000
#define DEFAULT_PROP_EXPOSURE 16384
#define DEFAULT_PROP_GAIN 1.0
#define DEFAULT_PROP_OFFSET 0
#define DEFAULT_PROP_FORMAT qfmtMono16
/* pad templates */
static GstStaticPadTemplate gst_qcamsrc_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ GRAY16_LE, GRAY8 }")
)
);
/* class initialization */
G_DEFINE_TYPE (GstQcamSrc, gst_qcamsrc, GST_TYPE_PUSH_SRC);
static int g_qcam_use_count = 0;
static void
gst_qcamsrc_driver_ref ()
{
if (g_qcam_use_count == 0) {
QCam_LoadDriver ();
}
g_qcam_use_count++;
}
static void
gst_qcamsrc_driver_unref ()
{
g_qcam_use_count--;
if (g_qcam_use_count == 0) {
QCam_ReleaseDriver ();
}
}
static void
gst_qcamsrc_class_init (GstQcamSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qcamsrc", 0,
"QImaging QCam source");
gobject_class->set_property = gst_qcamsrc_set_property;
gobject_class->get_property = gst_qcamsrc_get_property;
gobject_class->dispose = gst_qcamsrc_dispose;
gobject_class->finalize = gst_qcamsrc_finalize;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_qcamsrc_src_template));
gst_element_class_set_static_metadata (gstelement_class,
"QCam Video Source", "Source/Video",
"QImaging QCam video source", "Joshua M. Doe <oss@nvl.army.mil>");
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_qcamsrc_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_qcamsrc_stop);
gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_qcamsrc_get_caps);
gstbasesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_qcamsrc_set_caps);
gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_qcamsrc_unlock);
gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_qcamsrc_unlock_stop);
gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_qcamsrc_create);
/* Install GObject properties */
g_object_class_install_property (gobject_class, PROP_DEVICE_INDEX,
g_param_spec_int ("device-index", "Device index",
"Index of device, use -1 to enumerate all and select last", -1,
G_MAXINT, DEFAULT_PROP_DEVICE_INDEX,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_NUM_CAPTURE_BUFFERS,
g_param_spec_uint ("num-capture-buffers", "Number of capture buffers",
"Number of capture buffers", 1, G_MAXUINT,
DEFAULT_PROP_NUM_CAPTURE_BUFFERS,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
g_param_spec_int ("timeout", "Timeout (ms)",
"Timeout in ms (0 to use default)", 0, G_MAXINT, DEFAULT_PROP_TIMEOUT,
(GParamFlags) (G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE)));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_EXPOSURE,
g_param_spec_uint ("exposure", "Exposure (us)",
"Exposure time in microseconds", 0, G_MAXINT, DEFAULT_PROP_EXPOSURE,
(GParamFlags) (G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE)));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GAIN,
g_param_spec_float ("gain", "Normalized gain",
"Normalized gain", 0, 1000, DEFAULT_PROP_GAIN,
(GParamFlags) (G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE)));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_OFFSET,
g_param_spec_int ("offset", "Offset",
"Absolute offset", -G_MAXINT, G_MAXINT, DEFAULT_PROP_OFFSET,
(GParamFlags) (G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE)));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FORMAT,
g_param_spec_int ("format", "Image format",
"Image format (2=GRAY8, 3=GRAY16_LE)", 2, 3, DEFAULT_PROP_FORMAT,
(GParamFlags) (G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE)));
}
static void
gst_qcamsrc_reset (GstQcamSrc * src)
{
src->handle = NULL;
src->exposure = DEFAULT_PROP_EXPOSURE;
src->gain = DEFAULT_PROP_GAIN;
src->offset = DEFAULT_PROP_OFFSET;
src->format = DEFAULT_PROP_FORMAT;
src->last_frame_count = 0;
src->total_dropped_frames = 0;
if (src->caps) {
gst_caps_unref (src->caps);
src->caps = NULL;
}
src->width = 0;
src->height = 0;
if (src->queue) {
// TODO: remove dangling buffers
g_async_queue_unref (src->queue);
}
src->queue = g_async_queue_new ();
}
static void
gst_qcamsrc_init (GstQcamSrc * src)
{
GST_DEBUG_OBJECT (src, "Initialize instance");
gst_qcamsrc_driver_ref ();
/* set source as live (no preroll) */
gst_base_src_set_live (GST_BASE_SRC (src), TRUE);
/* override default of BYTES to operate in time mode */
gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
/* initialize member variables */
src->device_index = DEFAULT_PROP_DEVICE_INDEX;
src->num_capture_buffers = DEFAULT_PROP_NUM_CAPTURE_BUFFERS;
src->timeout = DEFAULT_PROP_TIMEOUT;
src->stop_requested = FALSE;
src->caps = NULL;
src->queue = NULL;
gst_qcamsrc_reset (src);
}
static void
gst_qcamsrc_set_exposure (GstQcamSrc * src, unsigned long exposure)
{
QCam_SetParam (&src->qsettings, qprmExposure, exposure);
QCam_SendSettingsToCam (src->handle, &src->qsettings);
}
static void
gst_qcamsrc_set_gain (GstQcamSrc * src, float gain)
{
QCam_SetParam (&src->qsettings, qprmNormalizedGain,
(unsigned long) (gain * 1000000));
QCam_SendSettingsToCam (src->handle, &src->qsettings);
}
static void
gst_qcamsrc_set_offset (GstQcamSrc * src, long offset)
{
QCam_SetParamS32 (&src->qsettings, qprmS32AbsoluteOffset, offset);
QCam_SendSettingsToCam (src->handle, &src->qsettings);
}
void
gst_qcamsrc_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstQcamSrc *src;
src = GST_QCAM_SRC (object);
switch (property_id) {
case PROP_DEVICE_INDEX:
src->device_index = g_value_get_int (value);
break;
case PROP_NUM_CAPTURE_BUFFERS:
src->num_capture_buffers = g_value_get_uint (value);
break;
case PROP_TIMEOUT:
src->timeout = g_value_get_int (value);
break;
case PROP_EXPOSURE:
src->exposure = g_value_get_uint (value);
if (src->handle)
gst_qcamsrc_set_exposure (src, src->exposure);
break;
case PROP_GAIN:
src->gain = g_value_get_float (value);
if (src->handle)
gst_qcamsrc_set_gain (src, src->gain);
break;
case PROP_OFFSET:
src->offset = g_value_get_int (value);
if (src->handle)
gst_qcamsrc_set_offset (src, src->offset);
break;
case PROP_FORMAT:
src->format = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_qcamsrc_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstQcamSrc *src;
g_return_if_fail (GST_IS_QCAM_SRC (object));
src = GST_QCAM_SRC (object);
switch (property_id) {
case PROP_DEVICE_INDEX:
g_value_set_int (value, src->device_index);
break;
case PROP_NUM_CAPTURE_BUFFERS:
g_value_set_uint (value, src->num_capture_buffers);
break;
case PROP_TIMEOUT:
g_value_set_int (value, src->timeout);
break;
case PROP_EXPOSURE:
g_value_set_uint (value, src->exposure);
break;
case PROP_GAIN:
g_value_set_float (value, src->gain);
break;
case PROP_OFFSET:
g_value_set_int (value, src->offset);
break;
case PROP_FORMAT:
g_value_set_int (value, src->format);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_qcamsrc_dispose (GObject * object)
{
GstQcamSrc *src;
g_return_if_fail (GST_IS_QCAM_SRC (object));
src = GST_QCAM_SRC (object);
/* clean up as possible. may be called multiple times */
G_OBJECT_CLASS (gst_qcamsrc_parent_class)->dispose (object);
}
void
gst_qcamsrc_finalize (GObject * object)
{
GstQcamSrc *src;
g_return_if_fail (GST_IS_QCAM_SRC (object));
src = GST_QCAM_SRC (object);
/* clean up object here */
if (src->caps) {
gst_caps_unref (src->caps);
src->caps = NULL;
}
gst_qcamsrc_driver_unref ();
G_OBJECT_CLASS (gst_qcamsrc_parent_class)->finalize (object);
}
typedef struct
{
GstQcamSrc *src;
QCam_Frame frame;
GstClockTime clock_time;
} VideoFrame;
static void
video_frame_queue (VideoFrame * frame)
{
QCam_Err err;
g_assert (frame->src->handle);
GST_TRACE_OBJECT (frame->src, "Queuing frame 0x%x", frame);
err = QCam_QueueFrame (frame->src->handle,
&frame->frame,
gst_qcamsrc_frame_callback,
qcCallbackDone | qcCallbackExposeDone, frame, 0);
}
static void
video_frame_release (void *data)
{
VideoFrame *frame = (VideoFrame *) data;
video_frame_queue (frame);
}
static VideoFrame *
video_frame_create (GstQcamSrc * src, gsize buf_size)
{
VideoFrame *frame = g_new (VideoFrame, 1);
frame->frame.pBuffer = g_malloc (buf_size);
if (!frame->frame.pBuffer) {
GST_ERROR_OBJECT (src, "Failed to allocate buffer of size %d", buf_size);
g_free (frame);
return NULL;
}
frame->src = src;
frame->frame.bufferSize = buf_size;
return frame;
}
static gboolean
gst_qcamsrc_setup_stream (GstQcamSrc * src)
{
QCam_Err err;
QCam_CamListItem cam_list[255];
unsigned long num_cams = 255;
unsigned long width, height, imageFormat, exposure, gain;
long offset;
err = QCam_ListCameras (cam_list, &num_cams);
if (err != qerrSuccess) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
("Failed to get list of cameras (errcode=%d)", err), (NULL));
return FALSE;
}
GST_DEBUG_OBJECT (src, "Found %d cameras", num_cams);
if (src->device_index + 1 > num_cams) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
("device-index (%d) exceeds number of cameras found (%d)",
src->device_index, num_cams), (NULL));
return FALSE;
}
err = QCam_OpenCamera (cam_list[src->device_index].cameraId, &src->handle);
if (err != qerrSuccess) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
("Failed to open camera (errcode=%d)", err), (NULL));
return FALSE;
}
err = QCam_SetStreaming (src->handle, TRUE);
if (err != qerrSuccess) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
("Failed to start streaming (errcode=%d)", err), (NULL));
QCam_CloseCamera (src->handle);
return FALSE;
}
err = QCam_ReadSettingsFromCam (src->handle, &src->qsettings);
if (err != qerrSuccess) {
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
("Failed to read settings (errcode=%d)", err), (NULL));
QCam_CloseCamera (src->handle);
return FALSE;
}
err = QCam_SetParam (&src->qsettings, qprmImageFormat, src->format);
gst_qcamsrc_set_exposure (src, src->exposure);
gst_qcamsrc_set_gain (src, src->gain);
gst_qcamsrc_set_offset (src, src->offset);
err = QCam_GetInfo (src->handle, qinfCcdWidth, &width);
err = QCam_GetInfo (src->handle, qinfCcdHeight, &height);
GST_DEBUG_OBJECT (src, "Opened camera with CCD width,height=%d,%d", width,
height);
err = QCam_GetParam (&src->qsettings, qprmRoiWidth, &width);
err = QCam_GetParam (&src->qsettings, qprmRoiHeight, &height);
err = QCam_GetParam (&src->qsettings, qprmImageFormat, &imageFormat);
err = QCam_GetParam (&src->qsettings, qprmExposure, &exposure);
err = QCam_GetParam (&src->qsettings, qprmNormalizedGain, &gain);
err = QCam_GetParamS32 (&src->qsettings, qprmS32AbsoluteOffset, &offset);
GST_DEBUG_OBJECT (src,
"ROI configured with width,height,format,exposure,gain,offset=%d,%d,%d,%d,%d,%d,%d",
width, height, imageFormat, exposure, gain, offset);
for (int i = 0; i < src->num_capture_buffers; ++i) {
unsigned long buf_size;
QCam_GetInfo (src->handle, qinfImageSize, &buf_size);
VideoFrame *frame = video_frame_create (src, buf_size);
video_frame_queue (frame);
}
{
GstStructure *structure;
GstCaps *caps;
caps = gst_caps_new_empty ();
structure = gst_structure_from_string ("video/x-raw", NULL);
const char *gst_format;
if (imageFormat == qfmtMono8)
gst_format = "GRAY8";
else if (imageFormat == qfmtMono16)
gst_format = "GRAY16_LE";
gst_structure_set (structure,
"format", G_TYPE_STRING, gst_format,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, 30, 1, NULL);
gst_caps_append_structure (caps, structure);
if (src->caps) {
gst_caps_unref (src->caps);
}
src->caps = caps;
gst_base_src_set_caps (GST_BASE_SRC (src), src->caps);
}
return TRUE;
}
static gboolean
gst_qcamsrc_start (GstBaseSrc * bsrc)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GST_DEBUG_OBJECT (src, "start");
if (!gst_qcamsrc_setup_stream (src)) {
/* error already sent */
goto error;
}
return TRUE;
error:
return FALSE;
}
static gboolean
gst_qcamsrc_stop (GstBaseSrc * bsrc)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GST_DEBUG_OBJECT (src, "stop");
if (src->handle) {
QCam_CloseCamera (src->handle);
src->handle = NULL;
}
gst_qcamsrc_reset (src);
return TRUE;
}
static GstCaps *
gst_qcamsrc_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GstCaps *caps;
if (src->caps == NULL) {
caps = gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (src));
} else {
caps = gst_caps_copy (src->caps);
}
GST_DEBUG_OBJECT (src, "The caps before filtering are %" GST_PTR_FORMAT,
caps);
if (filter && caps) {
GstCaps *tmp = gst_caps_intersect (caps, filter);
gst_caps_unref (caps);
caps = tmp;
}
GST_DEBUG_OBJECT (src, "The caps after filtering are %" GST_PTR_FORMAT, caps);
return caps;
}
static gboolean
gst_qcamsrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GST_DEBUG_OBJECT (src, "The caps being set are %" GST_PTR_FORMAT, caps);
return TRUE;
}
static gboolean
gst_qcamsrc_unlock (GstBaseSrc * bsrc)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GST_LOG_OBJECT (src, "unlock");
src->stop_requested = TRUE;
return TRUE;
}
static gboolean
gst_qcamsrc_unlock_stop (GstBaseSrc * bsrc)
{
GstQcamSrc *src = GST_QCAM_SRC (bsrc);
GST_LOG_OBJECT (src, "unlock_stop");
src->stop_requested = FALSE;
return TRUE;
}
static GstFlowReturn
gst_qcamsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstQcamSrc *src = GST_QCAM_SRC (psrc);
GstClock *clock;
GstClockTime clock_time;
QCam_Err err;
VideoFrame *video_frame;
GST_LOG_OBJECT (src, "create");
video_frame =
(VideoFrame *) g_async_queue_timeout_pop (src->queue,
(guint64) src->timeout * 1000);
if (!video_frame) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
("Failed to get buffer in %d ms", src->timeout), (NULL));
return GST_FLOW_ERROR;
}
*buf = gst_buffer_new_wrapped_full ((GstMemoryFlags)
GST_MEMORY_FLAG_PHYSICALLY_CONTIGUOUS,
(gpointer) video_frame->frame.pBuffer, video_frame->frame.bufferSize, 0,
video_frame->frame.bufferSize, video_frame,
(GDestroyNotify) video_frame_release);
/* check for dropped frames and disrupted signal */
//dropped_frames = (circ_handle.FrameCount - src->last_frame_count) - 1;
//if (dropped_frames > 0) {
// src->total_dropped_frames += dropped_frames;
// GST_WARNING_OBJECT (src, "Dropped %d frames (%d total)", dropped_frames,
// src->total_dropped_frames);
//} else if (dropped_frames < 0) {
// GST_WARNING_OBJECT (src, "Frame count non-monotonic, signal disrupted?");
//}
//src->last_frame_count = circ_handle.FrameCount;
GST_BUFFER_TIMESTAMP (*buf) =
GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (src)),
video_frame->clock_time);
if (src->stop_requested) {
if (*buf != NULL) {
gst_buffer_unref (*buf);
*buf = NULL;
}
return GST_FLOW_FLUSHING;
}
return GST_FLOW_OK;
}
void
gst_qcamsrc_frame_callback (void *userPtr, unsigned long userData,
QCam_Err errcode, unsigned long flags)
{
VideoFrame *frame = (VideoFrame *) (userPtr);
if (flags & qcCallbackExposeDone) {
GstClock *clock = gst_element_get_clock (GST_ELEMENT (frame->src));
frame->clock_time = gst_clock_get_time (clock);
gst_object_unref (clock);
GST_TRACE_OBJECT (frame->src, "ExposeDone callback for frame 0x%x", frame);
} else if (flags & qcCallbackDone) {
GST_TRACE_OBJECT (frame->src, "FrameDone callback for frame 0x%x", frame);
if (errcode != qerrSuccess) {
GST_WARNING_OBJECT (frame->src, "Error code in callback: %d", errcode);
}
g_async_queue_push (frame->src->queue, frame);
} else {
g_assert_not_reached ();
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qcam", 0,
"debug category for qcam plugin");
if (!gst_element_register (plugin, "qcamsrc", GST_RANK_NONE,
gst_qcamsrc_get_type ())) {
return FALSE;
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
qcam,
"QImaging QCam video element",
plugin_init, GST_PACKAGE_VERSION, GST_PACKAGE_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)

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sys/qcam/gstqcamsrc.h Normal file
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/* GStreamer
* Copyright (C) 2021 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_QCAM_SRC_H_
#define _GST_QCAM_SRC_H_
#include <gst/base/gstpushsrc.h>
#include <QCamApi.h>
G_BEGIN_DECLS
#define GST_TYPE_QCAM_SRC (gst_qcamsrc_get_type())
#define GST_QCAM_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QCAM_SRC,GstQcamSrc))
#define GST_QCAM_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QCAM_SRC,GstQcamSrcClass))
#define GST_IS_QCAM_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QCAM_SRC))
#define GST_IS_QCAM_SRC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QCAM_SRC))
typedef struct _GstQcamSrc GstQcamSrc;
typedef struct _GstQcamSrcClass GstQcamSrcClass;
struct _GstQcamSrc
{
GstPushSrc base_qcamsrc;
/* camera handle */
QCam_Handle handle;
QCam_Settings qsettings;
/* properties */
gint device_index;
guint num_capture_buffers;
gint timeout;
guint exposure;
gfloat gain;
gint offset;
gint format;
GAsyncQueue *queue;
GstClockTime base_time;
guint32 last_frame_count;
guint32 total_dropped_frames;
GstCaps *caps;
gint width;
gint height;
gboolean stop_requested;
};
struct _GstQcamSrcClass
{
GstPushSrcClass base_qcamsrc_class;
};
GType gst_qcamsrc_get_type (void);
G_END_DECLS
#endif