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gst-plugin-linescan/sys/phoenix/gstphoenixsrc.c
Joshua M. Doe 2296c487ae style: run gst-indent
2014-01-24 10:02:53 -05:00

841 lines
26 KiB
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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., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstphoenixsrc
*
* The phoenixsrc element is a source for framegrabbers supported by the Active Silicon Phoenix driver.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v phoenixsrc ! ffmpegcolorspace ! autovideosink
* ]|
* Shows video from the default Phoenix framegrabber
* </refsect2>
*/
/* TODO:
* allow for use of onboard LUT (rare, since we usually want raw data)
* allow for colorspace conversions (again rare)
* test sending of API-provided buffers, using GST_BUFFER_FREE_FUNC
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <gst/video/video.h>
#include <gst/gst-i18n-lib.h>
#include "gstphoenixsrc.h"
GST_DEBUG_CATEGORY_STATIC (gst_phoenixsrc_debug);
#define GST_CAT_DEFAULT gst_phoenixsrc_debug
/* prototypes */
static void gst_phoenixsrc_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_phoenixsrc_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_phoenixsrc_dispose (GObject * object);
static void gst_phoenixsrc_finalize (GObject * object);
static GstCaps *gst_phoenixsrc_get_caps (GstBaseSrc * src);
static gboolean gst_phoenixsrc_set_caps (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_phoenixsrc_newsegment (GstBaseSrc * src);
static gboolean gst_phoenixsrc_start (GstBaseSrc * src);
static gboolean gst_phoenixsrc_stop (GstBaseSrc * src);
static void
gst_phoenixsrc_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static gboolean gst_phoenixsrc_get_size (GstBaseSrc * src, guint64 * size);
static gboolean gst_phoenixsrc_is_seekable (GstBaseSrc * src);
static gboolean gst_phoenixsrc_query (GstBaseSrc * src, GstQuery * query);
static gboolean gst_phoenixsrc_check_get_range (GstBaseSrc * src);
static void gst_phoenixsrc_fixate (GstBaseSrc * src, GstCaps * caps);
static GstFlowReturn gst_phoenixsrc_create (GstPushSrc * src, GstBuffer ** buf);
enum
{
PROP_0,
PROP_CAMERA_CONFIG_FILEPATH,
PROP_NUM_CAPTURE_BUFFERS
};
#define DEFAULT_PROP_CAMERA_CONFIG_FILEPATH NULL /* defaults to 640x480x8bpp */
#define DEFAULT_PROP_NUM_CAPTURE_BUFFERS 2
/* pad templates */
static GstStaticPadTemplate gst_phoenixsrc_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8 ";"
GST_VIDEO_CAPS_GRAY16 ("BIG_ENDIAN") ";"
GST_VIDEO_CAPS_GRAY16 ("LITTLE_ENDIAN") ";"
GST_VIDEO_CAPS_RGB ";"
GST_VIDEO_CAPS_xRGB ";" GST_VIDEO_CAPS_RGB_15 ";" GST_VIDEO_CAPS_RGB_16)
);
/* class initialization */
GST_BOILERPLATE (GstPhoenixSrc, gst_phoenixsrc, GstPushSrc, GST_TYPE_PUSH_SRC);
static GstVideoFormat
gst_phoenixsrc_color_format_to_video_format (int dst_format, int dst_endian)
{
switch (dst_format) {
case PHX_DST_FORMAT_Y8:
return GST_VIDEO_FORMAT_GRAY8;
/* TODO: possibly use different formats for each of the following */
case PHX_DST_FORMAT_Y10:
case PHX_DST_FORMAT_Y12:
case PHX_DST_FORMAT_Y14:
case PHX_DST_FORMAT_Y16:
if (dst_endian == PHX_DST_LITTLE_ENDIAN)
return GST_VIDEO_FORMAT_GRAY16_LE;
else if (dst_endian == PHX_DST_BIG_ENDIAN)
return GST_VIDEO_FORMAT_GRAY16_BE;
else
return GST_VIDEO_FORMAT_UNKNOWN;
/* TODO: Bayer here */
case PHX_DST_FORMAT_RGB15:
return GST_VIDEO_FORMAT_RGB15;
case PHX_DST_FORMAT_RGB16:
return GST_VIDEO_FORMAT_RGB16;
case PHX_DST_FORMAT_RGB24:
return GST_VIDEO_FORMAT_RGB;
case PHX_DST_FORMAT_RGB32: /* FIXME: what is the format of this? */
case PHX_DST_FORMAT_XRGB32:
return GST_VIDEO_FORMAT_xRGB;
default:
return GST_VIDEO_FORMAT_UNKNOWN;
}
};
static void
gst_phoenixsrc_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_phoenixsrc_src_template));
gst_element_class_set_details_simple (element_class,
"Active Silicon Phoenix Video Source", "Source/Video",
"Active Silicon Phoenix framegrabber video source",
"Joshua M. Doe <oss@nvl.army.mil>");
}
static void
gst_phoenixsrc_class_init (GstPhoenixSrcClass * 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_phoenixsrc_set_property;
gobject_class->get_property = gst_phoenixsrc_get_property;
gobject_class->dispose = gst_phoenixsrc_dispose;
gobject_class->finalize = gst_phoenixsrc_finalize;
base_src_class->get_caps = GST_DEBUG_FUNCPTR (gst_phoenixsrc_get_caps);
base_src_class->set_caps = GST_DEBUG_FUNCPTR (gst_phoenixsrc_set_caps);
base_src_class->newsegment = GST_DEBUG_FUNCPTR (gst_phoenixsrc_newsegment);
base_src_class->start = GST_DEBUG_FUNCPTR (gst_phoenixsrc_start);
base_src_class->stop = GST_DEBUG_FUNCPTR (gst_phoenixsrc_stop);
base_src_class->get_times = GST_DEBUG_FUNCPTR (gst_phoenixsrc_get_times);
base_src_class->get_size = GST_DEBUG_FUNCPTR (gst_phoenixsrc_get_size);
base_src_class->is_seekable = GST_DEBUG_FUNCPTR (gst_phoenixsrc_is_seekable);
base_src_class->query = GST_DEBUG_FUNCPTR (gst_phoenixsrc_query);
base_src_class->check_get_range =
GST_DEBUG_FUNCPTR (gst_phoenixsrc_check_get_range);
base_src_class->fixate = GST_DEBUG_FUNCPTR (gst_phoenixsrc_fixate);
push_src_class->create = GST_DEBUG_FUNCPTR (gst_phoenixsrc_create);
/* Install GObject properties */
g_object_class_install_property (gobject_class, PROP_CAMERA_CONFIG_FILEPATH,
g_param_spec_string ("config-file", "Config file",
"Camera configuration filepath", DEFAULT_PROP_CAMERA_CONFIG_FILEPATH,
(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)));
}
static void
gst_phoenixsrc_init (GstPhoenixSrc * phoenixsrc,
GstPhoenixSrcClass * phoenixsrc_class)
{
phoenixsrc->srcpad =
gst_pad_new_from_static_template (&gst_phoenixsrc_src_template, "src");
/* set source as live (no preroll) */
gst_base_src_set_live (GST_BASE_SRC (phoenixsrc), TRUE);
/* override default of BYTES to operate in time mode */
gst_base_src_set_format (GST_BASE_SRC (phoenixsrc), GST_FORMAT_TIME);
/* initialize member variables */
phoenixsrc->config_filepath = g_strdup (DEFAULT_PROP_CAMERA_CONFIG_FILEPATH);
phoenixsrc->num_capture_buffers = DEFAULT_PROP_NUM_CAPTURE_BUFFERS;
phoenixsrc->first_phoenix_ts = GST_CLOCK_TIME_NONE;
phoenixsrc->frame_start_times =
g_new (guint64, phoenixsrc->num_capture_buffers);
phoenixsrc->frame_end_times =
g_new (guint64, phoenixsrc->num_capture_buffers);
phoenixsrc->buffer_ready = FALSE;
phoenixsrc->timeout_occurred = FALSE;
phoenixsrc->fifo_overflow_occurred = FALSE;
phoenixsrc->buffer_ready_count = 0;
phoenixsrc->buffer_processed_count = 0;
phoenixsrc->frame_end_count = 0;
phoenixsrc->frame_start_count = 0;
/*phoenixsrc->frame_count = 0; */
phoenixsrc->mutex = g_mutex_new ();
phoenixsrc->cond = g_cond_new ();
}
void
gst_phoenixsrc_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstPhoenixSrc *phoenixsrc;
g_return_if_fail (GST_IS_PHOENIX_SRC (object));
phoenixsrc = GST_PHOENIX_SRC (object);
switch (property_id) {
case PROP_CAMERA_CONFIG_FILEPATH:
g_free (phoenixsrc->config_filepath);
phoenixsrc->config_filepath = g_strdup (g_value_get_string (value));
break;
case PROP_NUM_CAPTURE_BUFFERS:
if (phoenixsrc->acq_started) {
GST_ELEMENT_WARNING (phoenixsrc, RESOURCE, SETTINGS,
("Number of capture buffers cannot be changed after acquisition has started."),
(NULL));
} else {
phoenixsrc->num_capture_buffers = g_value_get_uint (value);
g_free (phoenixsrc->frame_start_times);
phoenixsrc->frame_start_times =
g_new (guint64, phoenixsrc->num_capture_buffers);
g_free (phoenixsrc->frame_end_times);
phoenixsrc->frame_end_times =
g_new (guint64, phoenixsrc->num_capture_buffers);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_phoenixsrc_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstPhoenixSrc *phoenixsrc;
g_return_if_fail (GST_IS_PHOENIX_SRC (object));
phoenixsrc = GST_PHOENIX_SRC (object);
switch (property_id) {
case PROP_CAMERA_CONFIG_FILEPATH:
g_value_set_string (value, phoenixsrc->config_filepath);
break;
case PROP_NUM_CAPTURE_BUFFERS:
g_value_set_uint (value, phoenixsrc->num_capture_buffers);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_phoenixsrc_dispose (GObject * object)
{
GstPhoenixSrc *phoenixsrc;
g_return_if_fail (GST_IS_PHOENIX_SRC (object));
phoenixsrc = GST_PHOENIX_SRC (object);
/* clean up as possible. may be called multiple times */
g_free (phoenixsrc->config_filepath);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_phoenixsrc_finalize (GObject * object)
{
GstPhoenixSrc *phoenixsrc;
g_return_if_fail (GST_IS_PHOENIX_SRC (object));
phoenixsrc = GST_PHOENIX_SRC (object);
/* clean up object here */
g_free (phoenixsrc->frame_start_times);
g_free (phoenixsrc->frame_end_times);
g_mutex_free (phoenixsrc->mutex);
g_cond_free (phoenixsrc->cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_phoenixsrc_get_caps (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "get_caps");
/* return template caps if we don't know the actual camera caps */
if (!phoenixsrc->caps) {
return
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD
(phoenixsrc)));
}
return gst_caps_copy (phoenixsrc->caps);
return NULL;
}
static gboolean
gst_phoenixsrc_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GstStructure *structure;
gboolean ret;
gint width, height;
GST_DEBUG_OBJECT (phoenixsrc, "set_caps");
if (phoenixsrc->caps) {
gst_caps_unref (phoenixsrc->caps);
phoenixsrc->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, &width, "height", G_TYPE_INT, &height, NULL);
if (!ret) {
GST_DEBUG ("Failed to retrieve width and height");
return FALSE;
}
return TRUE;
}
static gboolean
gst_phoenixsrc_newsegment (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "newsegment");
return TRUE;
}
static inline GstClockTime
gst_phoenix_get_timestamp (GstPhoenixSrc * phoenixsrc)
{
ui32 dwParam;
guint64 timestamp;
/* get time in microseconds from start of acquisition */
/* TODO: check for rollover */
PHX_ParameterGet (phoenixsrc->hCamera, PHX_EVENTCOUNT, &dwParam);
timestamp = (guint64) 1000 *dwParam;
if (phoenixsrc->first_phoenix_ts == GST_CLOCK_TIME_NONE) {
phoenixsrc->first_phoenix_ts = timestamp;
}
return timestamp - phoenixsrc->first_phoenix_ts;
}
/* Callback function to handle image capture events. */
void
phx_callback (tHandle hCamera, ui32 dwMask, void *pvParams)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (pvParams);
GstClockTime ct = gst_phoenix_get_timestamp (phoenixsrc);
gboolean signal_create_func = FALSE;
guint n;
g_mutex_lock (phoenixsrc->mutex);
/* Note that more than one interrupt can be sent, so no "else if" */
/* called when frame valid signal goes high */
if (PHX_INTRPT_FRAME_START & dwMask) {
/* FIXME: this will work until frames are dropped */
n = phoenixsrc->frame_start_count % phoenixsrc->num_capture_buffers;
phoenixsrc->frame_start_times[n] = ct;
phoenixsrc->frame_start_count++;
}
/* called when frame valid signal goes low */
if (PHX_INTRPT_FRAME_END & dwMask) {
/* FIXME: this will work until frames are dropped */
n = (phoenixsrc->frame_end_count - 1) % phoenixsrc->num_capture_buffers;
phoenixsrc->frame_end_times[n] = ct;
phoenixsrc->frame_end_count++;
}
if (PHX_INTRPT_BUFFER_READY & dwMask) {
/* we have a buffer */
phoenixsrc->buffer_ready = TRUE;
phoenixsrc->buffer_ready_count++;
signal_create_func = TRUE;
}
if (PHX_INTRPT_TIMEOUT & dwMask) {
/* TODO: we could offer to try and ABORT then re-START capture */
phoenixsrc->timeout_occurred = TRUE;
signal_create_func = TRUE;
}
if (PHX_INTRPT_FIFO_OVERFLOW & dwMask) {
phoenixsrc->fifo_overflow_occurred = TRUE;
signal_create_func = TRUE;
}
if (signal_create_func)
g_cond_signal (phoenixsrc->cond);
g_mutex_unlock (phoenixsrc->mutex);
/* after unlocking, _create will check for these errors and copy data */
}
static gboolean
gst_phoenixsrc_start (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
etStat eStat = PHX_OK; /* Status variable */
etParamValue eParamValue = 0;
ui32 dwParamValue = 0;
guint32 phx_format, phx_endian, width, height;
GstVideoFormat videoFormat;
ui32 dwBufferWidth, dwBufferHeight;
GST_DEBUG_OBJECT (phoenixsrc, "start");
if (phoenixsrc->config_filepath == NULL) {
GST_WARNING_OBJECT (phoenixsrc,
"No config file set, using default 640x480x8bpp");
} else if (!g_file_test (phoenixsrc->config_filepath, G_FILE_TEST_EXISTS)) {
GST_ELEMENT_ERROR (phoenixsrc, RESOURCE, NOT_FOUND,
("Camera config file does not exist: %s", phoenixsrc->config_filepath),
(NULL));
goto Error;
}
/* Initialize board */
/* TODO: this picks first digital board using default settings, parameterize this! */
eStat =
PHX_CameraConfigLoad (&phoenixsrc->hCamera, phoenixsrc->config_filepath,
PHX_BOARD_AUTO | PHX_DIGITAL, PHX_ErrHandlerDefault);
if (eStat != PHX_OK) {
GST_ELEMENT_ERROR (phoenixsrc, LIBRARY, INIT, (NULL), (NULL));
goto Error;
}
/* capture frames continuously */
eParamValue = PHX_ENABLE;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_ACQ_CONTINUOUS, &eParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
/* capture in blocking fashion, i.e. don't overwrite un-processed buffers */
eParamValue = PHX_DISABLE;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_ACQ_BLOCKING, &eParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
/* use event counter to count time from start of acquisition */
eParamValue = PHX_EVENTCOUNT_TIME;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_EVENTCOUNT_SRC, &eParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
eParamValue = PHX_EVENTGATE_ACQ;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_EVENTGATE_SRC, &eParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
/* Get format (mono, Bayer, RBG, etc.) */
eStat = PHX_ParameterGet (phoenixsrc->hCamera, PHX_DST_FORMAT, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
phx_format = dwParamValue;
/* Get endianness */
eStat = PHX_ParameterGet (phoenixsrc->hCamera, PHX_DST_ENDIAN, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
phx_endian = dwParamValue;
/* get width */
eStat =
PHX_ParameterGet (phoenixsrc->hCamera, PHX_ROI_XLENGTH_SCALED,
&dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
width = dwParamValue;
/* get height */
eStat =
PHX_ParameterGet (phoenixsrc->hCamera, PHX_ROI_YLENGTH_SCALED,
&dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
height = dwParamValue;
/* get buffer size; width (in bytes) and height (in lines) */
eStat =
PHX_ParameterGet (phoenixsrc->hCamera, PHX_BUF_DST_XLENGTH,
&dwBufferWidth);
if (PHX_OK != eStat)
goto ResourceSettingsError;
eStat =
PHX_ParameterGet (phoenixsrc->hCamera, PHX_BUF_DST_YLENGTH,
&dwBufferHeight);
if (PHX_OK != eStat)
goto ResourceSettingsError;
phoenixsrc->buffer_size = dwBufferHeight * dwBufferWidth;
/* Tell Phoenix to use N buffers. */
eParamValue = phoenixsrc->num_capture_buffers;
PHX_ParameterSet (phoenixsrc->hCamera, PHX_ACQ_NUM_IMAGES, &eParamValue);
/* Setup a one second timeout value (milliseconds) */
dwParamValue = 1000;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_TIMEOUT_DMA,
(void *) &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
/* The BUFFER_READY interrupt is already enabled by default,
* but we must enable other interrupts here. */
eParamValue =
PHX_INTRPT_TIMEOUT | PHX_INTRPT_FIFO_OVERFLOW | PHX_INTRPT_FRAME_END |
PHX_INTRPT_FRAME_START;
eStat =
PHX_ParameterSet (phoenixsrc->hCamera, PHX_INTRPT_SET,
(void *) &eParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
videoFormat =
gst_phoenixsrc_color_format_to_video_format (phx_format, phx_endian);
if (videoFormat == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ELEMENT_ERROR (phoenixsrc, STREAM, WRONG_TYPE,
(_("Unknown or unsupported color format.")), (NULL));
goto Error;
}
if (phoenixsrc->caps)
gst_caps_unref (phoenixsrc->caps);
phoenixsrc->caps =
gst_video_format_new_caps (videoFormat, width, height, 30, 1, 1, 1);
if (phoenixsrc->caps == NULL) {
GST_ELEMENT_ERROR (phoenixsrc, STREAM, TOO_LAZY,
(_("Failed to generate caps from video format.")), (NULL));
goto Error;
}
return TRUE;
ResourceSettingsError:
GST_ELEMENT_ERROR (phoenixsrc, RESOURCE, SETTINGS,
(_("Failed to get Phoenix parameters.")), (NULL));
Error:
/* Now cease all captures */
if (phoenixsrc->hCamera)
PHX_Acquire (phoenixsrc->hCamera, PHX_ABORT, NULL);
/* TODO Free all the user allocated memory */
//psImageBuff = pasImageBuffs;
//if ( NULL != pasImageBuffs ) {
// while ( NULL != psImageBuff->pvAddress ) {
// free( psImageBuff->pvAddress );
// psImageBuff++;
// }
// free( pasImageBuffs );
//}
/* Release the Phoenix board */
if (phoenixsrc->hCamera)
PHX_CameraRelease (&phoenixsrc->hCamera);
return FALSE;
}
static gboolean
gst_phoenixsrc_stop (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "stop");
if (phoenixsrc->hCamera) {
/* Stop the acquisition */
/* TODO: should we use PHX_STOP (finished current image) instead? */
PHX_Acquire (phoenixsrc->hCamera, PHX_ABORT, NULL);
/* Deallocates hardware and software resources, setting handle to null */
PHX_CameraRelease (&phoenixsrc->hCamera);
}
gst_caps_unref (phoenixsrc->caps);
phoenixsrc->caps = NULL;
phoenixsrc->dropped_frame_count = 0;
/*phoenixsrc->last_time_code = -1; */
return TRUE;
}
static void
gst_phoenixsrc_get_times (GstBaseSrc * src, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "get_times");
}
static gboolean
gst_phoenixsrc_get_size (GstBaseSrc * src, guint64 * size)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "get_size");
return TRUE;
}
static gboolean
gst_phoenixsrc_is_seekable (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "is_seekable");
return FALSE;
}
static gboolean
gst_phoenixsrc_query (GstBaseSrc * src, GstQuery * query)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "query");
return TRUE;
}
static gboolean
gst_phoenixsrc_check_get_range (GstBaseSrc * src)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "get_range");
return FALSE;
}
static void
gst_phoenixsrc_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GST_DEBUG_OBJECT (phoenixsrc, "fixate");
}
static GstFlowReturn
gst_phoenixsrc_create (GstPushSrc * src, GstBuffer ** buf)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
GstFlowReturn ret;
etStat eStat = PHX_OK; /* Phoenix status variable */
ui32 dwParamValue = 0; /* Phoenix Get/Set intermediate variable */
stImageBuff phx_buffer;
guint dropped_frame_count = 0;
guint new_dropped_frames;
guint n;
/* Create and allocate the buffer */
ret = gst_pad_alloc_buffer (GST_BASE_SRC_PAD (GST_BASE_SRC (src)),
GST_BUFFER_OFFSET_NONE, phoenixsrc->buffer_size,
GST_PAD_CAPS (GST_BASE_SRC_PAD (GST_BASE_SRC (src))), buf);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
return GST_FLOW_ERROR;
}
/* Start acquisition */
if (!phoenixsrc->acq_started) {
/* make class instance pointer available to the callback, and flush cache */
PHX_ParameterSet (phoenixsrc->hCamera, PHX_EVENT_CONTEXT | PHX_CACHE_FLUSH,
(void *) phoenixsrc);
/* Now start our capture */
eStat = PHX_Acquire (phoenixsrc->hCamera, PHX_START, (void *) phx_callback);
if (PHX_OK != eStat) {
GST_ELEMENT_ERROR (phoenixsrc, RESOURCE, FAILED,
(_("Failed to start acquisition.")), (NULL));
return GST_FLOW_ERROR; /* TODO: make sure _stop is called if this happens to release resources */
}
phoenixsrc->acq_started = TRUE;
}
/* about to read/write variables modified by phx_callback */
g_mutex_lock (phoenixsrc->mutex);
/* wait for callback (we should always get at least a timeout( */
g_cond_wait (phoenixsrc->cond, phoenixsrc->mutex);
if (phoenixsrc->fifo_overflow_occurred) {
/* TODO: we could offer to try and ABORT then re-START capture */
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
(_("Acquisition failure due to FIFO overflow.")), (NULL));
g_mutex_unlock (phoenixsrc->mutex);
return GST_FLOW_ERROR;
}
if (phoenixsrc->timeout_occurred) {
/* TODO: we could offer to try and ABORT then re-START capture */
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
(_("Acquisition failure due to timeout.")), (NULL));
g_mutex_unlock (phoenixsrc->mutex);
return GST_FLOW_ERROR;
}
if (!phoenixsrc->buffer_ready) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
(_("You should not see this error, something very bad happened.")),
(NULL));
g_mutex_unlock (phoenixsrc->mutex);
return GST_FLOW_ERROR;
}
GST_INFO_OBJECT (phoenixsrc,
"Processing new buffer %d (Frame start: %d), ready-processed = %d",
phoenixsrc->buffer_ready_count, phoenixsrc->frame_start_count,
phoenixsrc->buffer_ready_count - phoenixsrc->buffer_processed_count);
phoenixsrc->buffer_ready = FALSE;
/* frame_start is always >= buffer_ready */
dropped_frame_count =
phoenixsrc->frame_start_count - phoenixsrc->buffer_ready_count;
g_mutex_unlock (phoenixsrc->mutex);
eStat = PHX_Acquire (phoenixsrc->hCamera, PHX_BUFFER_GET, &phx_buffer);
if (PHX_OK != eStat) {
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,
(_("Failed to get buffer.")), (NULL));
return GST_FLOW_ERROR;
}
/* Copy image to buffer from surface TODO: use orc_memcpy */
memcpy (GST_BUFFER_DATA (*buf), phx_buffer.pvAddress,
phoenixsrc->buffer_size);
/* Having processed the data, release the buffer ready for further image data */
eStat = PHX_Acquire (phoenixsrc->hCamera, PHX_BUFFER_RELEASE, NULL);
phoenixsrc->buffer_processed_count++;
/* check for dropped frames (can only detect more than one) */
new_dropped_frames = dropped_frame_count - phoenixsrc->dropped_frame_count;
if (new_dropped_frames > 0) {
phoenixsrc->dropped_frame_count = dropped_frame_count;
GST_WARNING ("Dropped %d frames (%d total)", new_dropped_frames,
phoenixsrc->dropped_frame_count);
/* TODO: emit message here about dropped frames */
}
GST_BUFFER_SIZE (*buf) = phoenixsrc->buffer_size;
/* use time from capture board */
n = (phoenixsrc->buffer_processed_count -
1) % phoenixsrc->num_capture_buffers;
GST_BUFFER_TIMESTAMP (*buf) = phoenixsrc->frame_start_times[n];
GST_BUFFER_DURATION (*buf) = GST_CLOCK_DIFF (phoenixsrc->frame_start_times[n],
phoenixsrc->frame_end_times[n]);
GST_BUFFER_OFFSET (*buf) = phoenixsrc->buffer_processed_count - 1;
GST_BUFFER_OFFSET_END (*buf) = GST_BUFFER_OFFSET (*buf);
return GST_FLOW_OK;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_phoenixsrc_debug, "phoenixsrc", 0,
"debug category for phoenixsrc element");
gst_element_register (plugin, "phoenixsrc", GST_RANK_NONE,
gst_phoenixsrc_get_type ());
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"phoenixsrc",
"Phoenix frame grabber source",
plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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