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gst-plugin-linescan/sys/phoenix/gstphoenixsrc.c
Joshua M. Doe 20b8d06c84 phoenix: fix buffer size and align strides
2014-01-24 10:03:08 -05:00

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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_memory_new_wrapped
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstpushsrc.h>
#include <gst/video/video.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 gboolean gst_phoenixsrc_start (GstBaseSrc * src);
static gboolean gst_phoenixsrc_stop (GstBaseSrc * src);
static GstCaps *gst_phoenixsrc_get_caps (GstBaseSrc * src, GstCaps * filter);
static gboolean gst_phoenixsrc_set_caps (GstBaseSrc * src, GstCaps * caps);
static GstFlowReturn gst_phoenixsrc_create (GstPushSrc * src, GstBuffer ** buf);
enum
{
PROP_0,
PROP_CAMERA_CONFIG_FILEPATH,
PROP_NUM_CAPTURE_BUFFERS,
PROP_BOARD,
PROP_CHANNEL
};
#define DEFAULT_PROP_CAMERA_CONFIG_FILEPATH NULL /* defaults to 640x480x8bpp */
#define DEFAULT_PROP_NUM_CAPTURE_BUFFERS 2
#define DEFAULT_PROP_BOARD 0
#define DEFAULT_PROP_CHANNEL 0
/* 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_MAKE
("{ GRAY8, GRAY16_LE, GRAY16_BE, RGB, xRGB, RGB_15, RGB_16 }"))
);
/* class initialization */
G_DEFINE_TYPE (GstPhoenixSrc, gst_phoenixsrc, 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_class_init (GstPhoenixSrcClass * 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);
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;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_phoenixsrc_src_template));
gst_element_class_set_static_metadata (gstelement_class,
"Active Silicon Phoenix Video Source", "Source/Video",
"Active Silicon Phoenix framegrabber video source",
"Joshua M. Doe <oss@nvl.army.mil>");
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_phoenixsrc_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_phoenixsrc_stop);
gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_phoenixsrc_get_caps);
gstbasesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_phoenixsrc_set_caps);
gstpushsrc_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)));
g_object_class_install_property (gobject_class, PROP_BOARD,
g_param_spec_uint ("board", "Board",
"Board number (0 for auto)", 0, 7,
DEFAULT_PROP_BOARD,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_CHANNEL,
g_param_spec_uint ("channel", "Channel",
"Channel number (0 for auto)", 0, 2,
DEFAULT_PROP_CHANNEL,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
}
static void
gst_phoenixsrc_init (GstPhoenixSrc * phoenixsrc)
{
/* 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->hCamera = 0;
g_mutex_init (&phoenixsrc->mutex);
g_cond_init (&phoenixsrc->cond);
}
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;
case PROP_BOARD:
phoenixsrc->board = g_value_get_uint (value);
break;
case PROP_CHANNEL:
phoenixsrc->channel = g_value_get_uint (value);
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;
case PROP_BOARD:
g_value_set_uint (value, phoenixsrc->board);
break;
case PROP_CHANNEL:
g_value_set_uint (value, phoenixsrc->channel);
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 (gst_phoenixsrc_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_OBJECT_CLASS (gst_phoenixsrc_parent_class)->finalize (object);
}
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 = PHX_INVALID_PARAMVALUE;
ui32 dwParamValue = 0;
guint eCamConfig;
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;
}
/* TODO: hacky, use enums or something */
eCamConfig = PHX_DIGITAL;
switch (phoenixsrc->board) {
case 0:
eCamConfig |= PHX_BOARD_AUTO;
break;
case 1:
eCamConfig |= PHX_BOARD1;
break;
case 2:
eCamConfig |= PHX_BOARD2;
break;
case 3:
eCamConfig |= PHX_BOARD3;
break;
case 4:
eCamConfig |= PHX_BOARD4;
break;
case 5:
eCamConfig |= PHX_BOARD5;
break;
case 6:
eCamConfig |= PHX_BOARD6;
break;
case 7:
eCamConfig |= PHX_BOARD7;
break;
default:
g_assert_not_reached ();
}
switch (phoenixsrc->channel) {
case 0:
eCamConfig |= PHX_CHANNEL_AUTO;
break;
case 1:
eCamConfig |= PHX_CHANNEL1;
break;
case 2:
eCamConfig |= PHX_CHANNEL2;
break;
}
/* Initialize board */
eStat =
PHX_CameraConfigLoad (&phoenixsrc->hCamera, phoenixsrc->config_filepath,
(etCamConfigLoad) eCamConfig, 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;
/* 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;
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);
}
phoenixsrc->dropped_frame_count = 0;
/*phoenixsrc->last_time_code = -1; */
return TRUE;
}
static GstCaps *
gst_phoenixsrc_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstPhoenixSrc *src = GST_PHOENIX_SRC (bsrc);
etStat eStat = PHX_OK; /* Status variable */
etParamValue eParamValue = PHX_INVALID_PARAMVALUE;
ui32 dwParamValue = 0;
guint32 phx_format, phx_endian;
GstVideoFormat videoFormat;
GstVideoInfo vinfo;
GstCaps *caps;
if (!src->hCamera) {
return gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (src));
}
/* Create video info */
gst_video_info_init (&vinfo);
/* Get format (mono, Bayer, RBG, etc.) */
eStat = PHX_ParameterGet (src->hCamera, PHX_DST_FORMAT, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
phx_format = dwParamValue;
/* Get endianness */
eStat = PHX_ParameterGet (src->hCamera, PHX_DST_ENDIAN, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
phx_endian = dwParamValue;
videoFormat =
gst_phoenixsrc_color_format_to_video_format (phx_format, phx_endian);
if (videoFormat == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ELEMENT_ERROR (src, STREAM, WRONG_TYPE,
(("Unknown or unsupported color format.")), (NULL));
goto Error;
}
vinfo.finfo = gst_video_format_get_info (videoFormat);
/* get width */
eStat =
PHX_ParameterGet (src->hCamera, PHX_ROI_XLENGTH_SCALED, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
GST_VIDEO_INFO_WIDTH (&vinfo) = dwParamValue;
/* get height */
eStat =
PHX_ParameterGet (src->hCamera, PHX_ROI_YLENGTH_SCALED, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
GST_VIDEO_INFO_HEIGHT (&vinfo) = dwParamValue;
/* get buffer size; width (in bytes) and height (in lines) */
eStat = PHX_ParameterGet (src->hCamera, PHX_BUF_DST_XLENGTH, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
src->phx_stride = dwParamValue;
eStat = PHX_ParameterGet (src->hCamera, PHX_BUF_DST_YLENGTH, &dwParamValue);
if (PHX_OK != eStat)
goto ResourceSettingsError;
/* TODO: should we be using PHX_BUF_DST_YLENGTH or PHX_ROI_YLENGTH_SCALED
for height? */
g_assert (dwParamValue == GST_VIDEO_INFO_HEIGHT (&vinfo));
caps = gst_video_info_to_caps (&vinfo);
if (caps == NULL) {
GST_ELEMENT_ERROR (src, STREAM, TOO_LAZY,
(("Failed to generate caps from video format.")), (NULL));
goto Error;
}
if (filter) {
GstCaps *tmp = gst_caps_intersect (caps, filter);
gst_caps_unref (caps);
caps = tmp;
}
return caps;
ResourceSettingsError:
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
(("Failed to get Phoenix parameters.")), (NULL));
Error:
return NULL;
}
static gboolean
gst_phoenixsrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstPhoenixSrc *src = GST_PHOENIX_SRC (bsrc);
if (!gst_video_info_from_caps (&src->vinfo, caps)) {
GST_ERROR_OBJECT (src, "Failed to parse caps: %" GST_PTR_FORMAT, caps);
return FALSE;
}
return TRUE;
}
static GstFlowReturn
gst_phoenixsrc_create (GstPushSrc * src, GstBuffer ** buf)
{
GstPhoenixSrc *phoenixsrc = GST_PHOENIX_SRC (src);
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;
gint i;
guint n;
GstMapInfo minfo;
guint gst_stride;
/* 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;
}
/* TODO: use allocator or use from Phoenix pool */
*buf = gst_buffer_new_and_alloc (phoenixsrc->vinfo.size);
/* Copy image to buffer from surface TODO: use orc_memcpy */
gst_buffer_map (*buf, &minfo, GST_MAP_WRITE);
gst_stride = GST_VIDEO_INFO_COMP_STRIDE (&phoenixsrc->vinfo, 0);
GST_DEBUG_OBJECT (phoenixsrc,
"GstBuffer size=%d, gst_stride=%d, phx_stride=%d", minfo.size, gst_stride,
phoenixsrc->phx_stride);
for (i = 0; i < phoenixsrc->vinfo.height; i++) {
memcpy (minfo.data + i * gst_stride,
((guint8 *) phx_buffer.pvAddress) + i * phoenixsrc->phx_stride,
gst_stride);
}
gst_buffer_unmap (*buf, &minfo);
/* 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 */
}
/* 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,
phoenix,
"Phoenix frame grabber source",
plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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