/* -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */ /* GStreamer * Copyright (C) <1999> Erik Walthinsen * <2000> Daniel Fischer * <2004> Wim Taymans * * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include "gstdv1394src.h" GST_DEBUG_CATEGORY_STATIC (dv1394src_debug); #define GST_CAT_DEFAULT (dv1394src_debug) #define PAL_FRAMESIZE 144000 #define PAL_FRAMERATE 25 #define NTSC_FRAMESIZE 120000 #define NTSC_FRAMERATE 30 /* Filter signals and args */ enum { SIGNAL_FRAME_DROPPED, /* FILL ME */ LAST_SIGNAL }; #define DEFAULT_PORT -1 #define DEFAULT_CHANNEL 63 #define DEFAULT_CONSECUTIVE 1 #define DEFAULT_SKIP 0 #define DEFAULT_DROP_INCOMPLETE TRUE #define DEFAULT_USE_AVC TRUE #define DEFAULT_GUID 0 enum { ARG_0, ARG_PORT, ARG_CHANNEL, ARG_CONSECUTIVE, ARG_SKIP, ARG_DROP_INCOMPLETE, ARG_USE_AVC, ARG_GUID }; static GstElementDetails gst_dv1394src_details = GST_ELEMENT_DETAILS ("Firewire (1394) DV Source", "Source/Video", "Source for DV video data from firewire port", "Erik Walthinsen \n" "Daniel Fischer \n" "Wim Taymans "); static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-dv, " "format = (string) { NTSC, PAL }") ); static void gst_dv1394src_base_init (gpointer g_class); static void gst_dv1394src_class_init (GstDV1394SrcClass * klass); static void gst_dv1394src_init (GstDV1394Src * filter); static void gst_dv1394src_dispose (GObject * obj); static void gst_dv1394src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_dv1394src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstElementStateReturn gst_dv1394src_change_state (GstElement * element); static GstData *gst_dv1394src_get (GstPad * pad); static const GstEventMask *gst_dv1394src_get_event_mask (GstPad * pad); static gboolean gst_dv1394src_event (GstPad * pad, GstEvent * event); static const GstFormat *gst_dv1394src_get_formats (GstPad * pad); static gboolean gst_dv1394src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static const GstQueryType *gst_dv1394src_get_query_types (GstPad * pad); static gboolean gst_dv1394src_query (GstPad * pad, GstQueryType type, GstFormat * format, gint64 * value); static GstElementClass *parent_class = NULL; static void gst_dv1394src_uri_handler_init (gpointer g_iface, gpointer iface_data); static guint gst_dv1394src_signals[LAST_SIGNAL] = { 0 }; GType gst_dv1394src_get_type (void) { static GType gst_dv1394src_type = 0; if (!gst_dv1394src_type) { static const GTypeInfo gst_dv1394src_info = { sizeof (GstDV1394Src), gst_dv1394src_base_init, NULL, (GClassInitFunc) gst_dv1394src_class_init, NULL, NULL, sizeof (GstDV1394Src), 0, (GInstanceInitFunc) gst_dv1394src_init, }; static const GInterfaceInfo urihandler_info = { gst_dv1394src_uri_handler_init, NULL, NULL, }; gst_dv1394src_type = g_type_register_static (GST_TYPE_ELEMENT, "DV1394Src", &gst_dv1394src_info, 0); g_type_add_interface_static (gst_dv1394src_type, GST_TYPE_URI_HANDLER, &urihandler_info); GST_DEBUG_CATEGORY_INIT (dv1394src_debug, "dv1394src", 0, "DV firewire source"); } return gst_dv1394src_type; } static void gst_dv1394src_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 (&src_factory)); gst_element_class_set_details (element_class, &gst_dv1394src_details); } static void gst_dv1394src_class_init (GstDV1394SrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gst_dv1394src_signals[SIGNAL_FRAME_DROPPED] = g_signal_new ("frame-dropped", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDV1394SrcClass, frame_dropped), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT, g_param_spec_int ("port", "Port", "Port number (-1 automatic)", -1, 16, DEFAULT_PORT, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CHANNEL, g_param_spec_int ("channel", "Channel", "Channel number for listening", 0, 64, DEFAULT_CHANNEL, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CONSECUTIVE, g_param_spec_int ("consecutive", "consecutive frames", "send n consecutive frames after skipping", 1, G_MAXINT, DEFAULT_CONSECUTIVE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SKIP, g_param_spec_int ("skip", "skip frames", "skip n frames", 0, G_MAXINT, DEFAULT_SKIP, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DROP_INCOMPLETE, g_param_spec_boolean ("drop_incomplete", "drop_incomplete", "drop incomplete frames", DEFAULT_DROP_INCOMPLETE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_USE_AVC, g_param_spec_boolean ("use-avc", "Use AV/C", "Use AV/C VTR control", DEFAULT_USE_AVC, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_GUID, g_param_spec_uint64 ("guid", "GUID", "select one of multiple DV devices by its GUID. use a hexadecimal " "like 0xhhhhhhhhhhhhhhhh. (0 = no guid)", 0, G_MAXUINT64, DEFAULT_GUID, G_PARAM_READWRITE)); parent_class = g_type_class_ref (GST_TYPE_ELEMENT); gobject_class->set_property = gst_dv1394src_set_property; gobject_class->get_property = gst_dv1394src_get_property; gobject_class->dispose = gst_dv1394src_dispose; gstelement_class->change_state = gst_dv1394src_change_state; } static void gst_dv1394src_init (GstDV1394Src * dv1394src) { dv1394src->srcpad = gst_pad_new_from_template (gst_element_get_pad_template (GST_ELEMENT (dv1394src), "src"), "src"); gst_pad_set_get_function (dv1394src->srcpad, gst_dv1394src_get); gst_pad_use_explicit_caps (dv1394src->srcpad); gst_pad_set_event_function (dv1394src->srcpad, gst_dv1394src_event); gst_pad_set_event_mask_function (dv1394src->srcpad, gst_dv1394src_get_event_mask); gst_pad_set_convert_function (dv1394src->srcpad, gst_dv1394src_convert); gst_pad_set_query_function (dv1394src->srcpad, gst_dv1394src_query); gst_pad_set_query_type_function (dv1394src->srcpad, gst_dv1394src_get_query_types); gst_pad_set_formats_function (dv1394src->srcpad, gst_dv1394src_get_formats); gst_element_add_pad (GST_ELEMENT (dv1394src), dv1394src->srcpad); dv1394src->port = DEFAULT_PORT; dv1394src->channel = DEFAULT_CHANNEL; dv1394src->consecutive = DEFAULT_CONSECUTIVE; dv1394src->skip = DEFAULT_SKIP; dv1394src->drop_incomplete = DEFAULT_DROP_INCOMPLETE; dv1394src->use_avc = DEFAULT_USE_AVC; dv1394src->guid = DEFAULT_GUID; /* initialized when first header received */ dv1394src->frame_size = 0; dv1394src->buf = NULL; dv1394src->frame = NULL; dv1394src->frame_sequence = 0; } static void gst_dv1394src_dispose (GObject * obj) { GstDV1394Src *dv1394src; dv1394src = GST_DV1394SRC (obj); G_OBJECT_CLASS (parent_class)->dispose (obj); } static void gst_dv1394src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDV1394Src *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_DV1394SRC (object)); filter = GST_DV1394SRC (object); switch (prop_id) { case ARG_PORT: filter->port = g_value_get_int (value); break; case ARG_CHANNEL: filter->channel = g_value_get_int (value); break; case ARG_SKIP: filter->skip = g_value_get_int (value); break; case ARG_CONSECUTIVE: filter->consecutive = g_value_get_int (value); break; case ARG_DROP_INCOMPLETE: filter->drop_incomplete = g_value_get_boolean (value); break; case ARG_USE_AVC: filter->use_avc = g_value_get_boolean (value); break; case ARG_GUID: filter->guid = g_value_get_uint64 (value); break; default: break; } } static void gst_dv1394src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDV1394Src *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_DV1394SRC (object)); filter = GST_DV1394SRC (object); switch (prop_id) { case ARG_PORT: g_value_set_int (value, filter->port); break; case ARG_CHANNEL: g_value_set_int (value, filter->channel); break; case ARG_SKIP: g_value_set_int (value, filter->skip); break; case ARG_CONSECUTIVE: g_value_set_int (value, filter->consecutive); break; case ARG_DROP_INCOMPLETE: g_value_set_boolean (value, filter->drop_incomplete); break; case ARG_USE_AVC: g_value_set_boolean (value, filter->use_avc); break; case ARG_GUID: g_value_set_uint64 (value, filter->guid); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static int gst_dv1394src_iso_receive (raw1394handle_t handle, int channel, size_t len, quadlet_t * data) { GstDV1394Src *dv1394src = GST_DV1394SRC (raw1394_get_userdata (handle)); if (len > 16) { /* the following code taken from kino-0.51 (Dan Dennedy/Charles Yates) */ unsigned char *p = (unsigned char *) &data[3]; int section_type = p[0] >> 5; /* section type is in bits 5 - 7 */ int dif_sequence = p[1] >> 4; /* dif sequence number is in bits 4 - 7 */ int dif_block = p[2]; /* if we are at the beginning of a frame, we set buf=frame, and alloc a new buffer for frame */ if (section_type == 0 && dif_sequence == 0) { // dif header if (!dv1394src->negotiated) { // figure format (NTSC/PAL) if (p[3] & 0x80) { // PAL dv1394src->frame_size = PAL_FRAMESIZE; dv1394src->frame_rate = PAL_FRAMERATE; GST_DEBUG ("PAL data"); if (!gst_pad_set_explicit_caps (dv1394src->srcpad, gst_caps_new_simple ("video/x-dv", "format", G_TYPE_STRING, "PAL", NULL))) { GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL), ("Could not set source caps for PAL")); return 0; } } else { // NTSC (untested) dv1394src->frame_size = NTSC_FRAMESIZE; dv1394src->frame_rate = NTSC_FRAMERATE; GST_DEBUG ("NTSC data [untested] - please report success/failure to "); if (!gst_pad_set_explicit_caps (dv1394src->srcpad, gst_caps_new_simple ("video/x-dv", "format", G_TYPE_STRING, "NTSC", NULL))) { GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL), ("Could not set source caps for NTSC")); return 0; } } dv1394src->negotiated = TRUE; } // drop last frame when not complete if (!dv1394src->drop_incomplete || dv1394src->bytes_in_frame == dv1394src->frame_size) { dv1394src->buf = dv1394src->frame; } else { GST_INFO_OBJECT (GST_ELEMENT (dv1394src), "incomplete frame dropped"); g_signal_emit (G_OBJECT (dv1394src), gst_dv1394src_signals[SIGNAL_FRAME_DROPPED], 0); if (dv1394src->frame) { gst_buffer_unref (dv1394src->frame); } } dv1394src->frame = NULL; if ((dv1394src->frame_sequence + 1) % (dv1394src->skip + dv1394src->consecutive) < dv1394src->consecutive) { GstFormat format; GstBuffer *buf; buf = gst_buffer_new_and_alloc (dv1394src->frame_size); /* fill in default offset */ format = GST_FORMAT_DEFAULT; gst_dv1394src_query (dv1394src->srcpad, GST_QUERY_POSITION, &format, &GST_BUFFER_OFFSET (buf)); /* fill in timestamp */ format = GST_FORMAT_TIME; gst_dv1394src_query (dv1394src->srcpad, GST_QUERY_POSITION, &format, &GST_BUFFER_TIMESTAMP (buf)); /* fill in duration by converting one frame to time */ gst_dv1394src_convert (dv1394src->srcpad, GST_FORMAT_DEFAULT, 1, &format, &GST_BUFFER_DURATION (buf)); dv1394src->frame = buf; } dv1394src->frame_sequence++; dv1394src->bytes_in_frame = 0; } if (dv1394src->frame != NULL) { guint8 *data = GST_BUFFER_DATA (dv1394src->frame); switch (section_type) { case 0: /* 1 Header block */ /* p[3] |= 0x80; // hack to force PAL data */ memcpy (data + dif_sequence * 150 * 80, p, 480); break; case 1: /* 2 Subcode blocks */ memcpy (data + dif_sequence * 150 * 80 + (1 + dif_block) * 80, p, 480); break; case 2: /* 3 VAUX blocks */ memcpy (data + dif_sequence * 150 * 80 + (3 + dif_block) * 80, p, 480); break; case 3: /* 9 Audio blocks interleaved with video */ memcpy (data + dif_sequence * 150 * 80 + (6 + dif_block * 16) * 80, p, 480); break; case 4: /* 135 Video blocks interleaved with audio */ memcpy (data + dif_sequence * 150 * 80 + (7 + (dif_block / 15) + dif_block) * 80, p, 480); break; default: /* we can't handle any other data */ break; } dv1394src->bytes_in_frame += 480; } } return 0; } static int gst_dv1394src_bus_reset (raw1394handle_t handle, unsigned int generation) { GST_INFO_OBJECT (GST_DV1394SRC (raw1394_get_userdata (handle)), "have bus reset"); return 0; } static GstData * gst_dv1394src_get (GstPad * pad) { GstDV1394Src *dv1394src = GST_DV1394SRC (GST_PAD_PARENT (pad)); dv1394src->buf = NULL; while (dv1394src->buf == NULL) raw1394_loop_iterate (dv1394src->handle); return GST_DATA (dv1394src->buf); } static int gst_dv1394src_discover_avc_node (GstDV1394Src * src) { int node = -1; int i, j = 0; int m = src->num_ports; if (src->port >= 0) { /* search on explicit port */ j = src->port; m = j + 1; } /* loop over all our ports */ for (; j < m && node == -1; j++) { raw1394handle_t handle; gint n_ports; struct raw1394_portinfo pinf[16]; /* open the port */ handle = raw1394_new_handle (); if (!handle) { g_warning ("raw1394 - failed to get handle: %s.\n", strerror (errno)); continue; } if ((n_ports = raw1394_get_port_info (handle, pinf, 16)) < 0) { g_warning ("raw1394 - failed to get port info: %s.\n", strerror (errno)); goto next; } /* tell raw1394 which host adapter to use */ if (raw1394_set_port (handle, j) < 0) { g_warning ("raw1394 - failed to set set port: %s.\n", strerror (errno)); goto next; } /* now loop over all the nodes */ for (i = 0; i < raw1394_get_nodecount (handle); i++) { /* are we looking for an explicit GUID */ if (src->guid != 0) { if (src->guid == rom1394_get_guid (handle, i)) { node = i; src->port = j; break; } } else { rom1394_directory rom_dir; /* select first AV/C Tape Reccorder Player node */ if (rom1394_get_directory (handle, i, &rom_dir) < 0) { g_warning ("error reading config rom directory for node %d\n", i); continue; } if ((rom1394_get_node_type (&rom_dir) == ROM1394_NODE_TYPE_AVC) && avc1394_check_subunit_type (handle, i, AVC1394_SUBUNIT_TYPE_VCR)) { node = i; src->port = j; break; } } } next: raw1394_destroy_handle (handle); } return node; } static GstElementStateReturn gst_dv1394src_change_state (GstElement * element) { GstDV1394Src *dv1394src; g_return_val_if_fail (GST_IS_DV1394SRC (element), GST_STATE_FAILURE); dv1394src = GST_DV1394SRC (element); switch (GST_STATE_TRANSITION (element)) { case GST_STATE_NULL_TO_READY: /* create a handle */ if ((dv1394src->handle = raw1394_new_handle ()) == NULL) { GST_ELEMENT_ERROR (dv1394src, RESOURCE, NOT_FOUND, (NULL), ("can't get raw1394 handle")); return GST_STATE_FAILURE; } /* set this plugin as the user data */ raw1394_set_userdata (dv1394src->handle, dv1394src); /* get number of ports */ dv1394src->num_ports = raw1394_get_port_info (dv1394src->handle, dv1394src->pinfo, 16); if (dv1394src->num_ports == 0) { GST_ELEMENT_ERROR (dv1394src, RESOURCE, NOT_FOUND, (NULL), ("no ports available for raw1394")); return GST_STATE_FAILURE; } if (dv1394src->use_avc || dv1394src->port == -1) { /* discover AVC and optionally the port */ dv1394src->avc_node = gst_dv1394src_discover_avc_node (dv1394src); } /* configure our port now */ if (raw1394_set_port (dv1394src->handle, dv1394src->port) < 0) { GST_ELEMENT_ERROR (dv1394src, RESOURCE, SETTINGS, (NULL), ("can't set 1394 port %d", dv1394src->port)); return GST_STATE_FAILURE; } /* set the callbacks */ raw1394_set_iso_handler (dv1394src->handle, dv1394src->channel, gst_dv1394src_iso_receive); raw1394_set_bus_reset_handler (dv1394src->handle, gst_dv1394src_bus_reset); dv1394src->started = FALSE; GST_DEBUG_OBJECT (dv1394src, "successfully opened up 1394 connection"); break; case GST_STATE_PAUSED_TO_PLAYING: if (raw1394_start_iso_rcv (dv1394src->handle, dv1394src->channel) < 0) { GST_ELEMENT_ERROR (dv1394src, RESOURCE, READ, (NULL), ("can't start 1394 iso receive")); return GST_STATE_FAILURE; } if (dv1394src->use_avc) { /* start the VCR */ if (!avc1394_vcr_is_recording (dv1394src->handle, dv1394src->avc_node) && avc1394_vcr_is_playing (dv1394src->handle, dv1394src->avc_node) != AVC1394_VCR_OPERAND_PLAY_FORWARD) { avc1394_vcr_play (dv1394src->handle, dv1394src->avc_node); } } break; case GST_STATE_PLAYING_TO_PAUSED: raw1394_stop_iso_rcv (dv1394src->handle, dv1394src->channel); if (dv1394src->use_avc) { /* pause the VCR */ if (!avc1394_vcr_is_recording (dv1394src->handle, dv1394src->avc_node) && (avc1394_vcr_is_playing (dv1394src->handle, dv1394src->avc_node) != AVC1394_VCR_OPERAND_PLAY_FORWARD_PAUSE)) { avc1394_vcr_pause (dv1394src->handle, dv1394src->avc_node); } } break; case GST_STATE_READY_TO_NULL: if (dv1394src->use_avc) { /* stop the VCR */ avc1394_vcr_stop (dv1394src->handle, dv1394src->avc_node); } raw1394_destroy_handle (dv1394src->handle); break; default: break; } /* if we haven't failed already, give the parent class a chance to ;-) */ if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; } static const GstEventMask * gst_dv1394src_get_event_mask (GstPad * pad) { static const GstEventMask masks[] = { {0,} }; return masks; } static gboolean gst_dv1394src_event (GstPad * pad, GstEvent * event) { return FALSE; } static const GstFormat * gst_dv1394src_get_formats (GstPad * pad) { static GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES, GST_FORMAT_DEFAULT, 0 }; return formats; } static gboolean gst_dv1394src_convert (GstPad * pad, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { GstDV1394Src *src; src = GST_DV1394SRC (gst_pad_get_parent (pad)); switch (src_format) { case GST_FORMAT_TIME: switch (*dest_format) { case GST_FORMAT_BYTES: src_value *= src->frame_size; case GST_FORMAT_DEFAULT: *dest_value = src_value * src->frame_rate / GST_SECOND; break; default: return FALSE; } break; case GST_FORMAT_BYTES: src_value /= src->frame_size; case GST_FORMAT_DEFAULT: switch (*dest_format) { case GST_FORMAT_BYTES: *dest_value = src_value * src->frame_size; break; case GST_FORMAT_TIME: if (src->frame_rate != 0) *dest_value = src_value * GST_SECOND / src->frame_rate; else return FALSE; break; default: return FALSE; } break; default: break; } return TRUE; } static const GstQueryType * gst_dv1394src_get_query_types (GstPad * pad) { static const GstQueryType src_query_types[] = { GST_QUERY_POSITION, 0 }; return src_query_types; } static gboolean gst_dv1394src_query (GstPad * pad, GstQueryType type, GstFormat * format, gint64 * value) { gboolean res = TRUE; GstDV1394Src *src; src = GST_DV1394SRC (gst_pad_get_parent (pad)); switch (type) { case GST_QUERY_POSITION: /* bring our current frame to the requested format */ res = gst_pad_convert (src->srcpad, GST_FORMAT_DEFAULT, src->frame_sequence, format, value); break; default: res = FALSE; break; } return res; } /*** GSTURIHANDLER INTERFACE *************************************************/ static guint gst_dv1394src_uri_get_type (void) { return GST_URI_SRC; } static gchar ** gst_dv1394src_uri_get_protocols (void) { static gchar *protocols[] = { "dv", NULL }; return protocols; } static const gchar * gst_dv1394src_uri_get_uri (GstURIHandler * handler) { GstDV1394Src *gst_dv1394src = GST_DV1394SRC (handler); return gst_dv1394src->uri; } static gboolean gst_dv1394src_uri_set_uri (GstURIHandler * handler, const gchar * uri) { gchar *protocol, *location; gboolean ret; ret = TRUE; GstDV1394Src *gst_dv1394src = GST_DV1394SRC (handler); protocol = gst_uri_get_protocol (uri); if (strcmp (protocol, "dv") != 0) { g_free (protocol); return FALSE; } g_free (protocol); location = gst_uri_get_location (uri); gst_dv1394src->port = strtol (location, NULL, 10); g_free (location); return ret; } static void gst_dv1394src_uri_handler_init (gpointer g_iface, gpointer iface_data) { GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface; iface->get_type = gst_dv1394src_uri_get_type; iface->get_protocols = gst_dv1394src_uri_get_protocols; iface->get_uri = gst_dv1394src_uri_get_uri; iface->set_uri = gst_dv1394src_uri_set_uri; }