/* GStreamer * Copyright (C) 2011 FIXME * * 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. * * * Example launch line * |[ * gst-launch -v phoenixsrc ! ffmpegcolorspace ! autovideosink * ]| * Shows video from the default Phoenix framegrabber * */ /* 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 #include #include #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 GstFlowReturn gst_phoenixsrc_fill (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_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 "); gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_phoenixsrc_start); gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_phoenixsrc_stop); gstpushsrc_class->fill = GST_DEBUG_FUNCPTR (gst_phoenixsrc_fill); /* 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) { /* 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; */ 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; 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 (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; guint32 phx_format, phx_endian; GstVideoFormat videoFormat; ui32 dwBufferWidth, dwBufferHeight; GstVideoInfo vinfo; GstCaps *caps; gboolean res; 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; /* Create video info */ gst_video_info_init (&vinfo); /* 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; 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; } vinfo.finfo = gst_video_format_get_info (videoFormat); /* get width */ eStat = PHX_ParameterGet (phoenixsrc->hCamera, PHX_ROI_XLENGTH_SCALED, &dwParamValue); if (PHX_OK != eStat) goto ResourceSettingsError; GST_VIDEO_INFO_WIDTH (&vinfo) = dwParamValue; /* get height */ eStat = PHX_ParameterGet (phoenixsrc->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 (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; caps = gst_video_info_to_caps (&vinfo); if (caps == NULL) { GST_ELEMENT_ERROR (phoenixsrc, STREAM, TOO_LAZY, (("Failed to generate caps from video format.")), (NULL)); goto Error; } res = gst_pad_set_caps (GST_BASE_SRC_PAD (phoenixsrc), caps); return res; 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 GstFlowReturn gst_phoenixsrc_fill (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; guint n; GstMapInfo minfo; /* 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 */ /* TODO: align strides */ gst_buffer_map (buf, &minfo, GST_MAP_WRITE); memcpy (minfo.data, phx_buffer.pvAddress, phoenixsrc->buffer_size); 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, "phoenixsrc", "Phoenix frame grabber source", plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)