gstreamer/ext/raw1394/gstdv1394src.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#include <gst/gst.h>
#include "gstdv1394src.h"
/* Filter signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0
};
static GstPadTemplate*
gst_dv1394src_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
template = gst_pad_template_new (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
gst_caps_new (
"dv1394src",
"video/dv",
gst_props_new (
"format", GST_PROPS_STRING ("NTSC"),
NULL)),
NULL);
}
return template;
}
static void gst_dv1394src_class_init (GstDV1394SrcClass *klass);
static void gst_dv1394src_init (GstDV1394Src *filter);
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 GstBuffer * gst_dv1394src_get (GstPad *pad);
static GstElementClass *parent_class = NULL;
/*static guint gst_filter_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), NULL,
NULL,
(GClassInitFunc)gst_dv1394src_class_init,
NULL,
NULL,
sizeof(GstDV1394Src),
0,
(GInstanceInitFunc)gst_dv1394src_init,
};
gst_dv1394src_type = g_type_register_static(GST_TYPE_ELEMENT, "DV1394Src", &gst_dv1394src_info, 0);
}
return gst_dv1394src_type;
}
static void
gst_dv1394src_class_init (GstDV1394SrcClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
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;
gstelement_class->change_state = gst_dv1394src_change_state;
}
static void
gst_dv1394src_init (GstDV1394Src *dv1394src)
{
dv1394src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_get_function (dv1394src->srcpad, gst_dv1394src_get);
gst_element_add_pad (GST_ELEMENT (dv1394src), dv1394src->srcpad);
dv1394src->card = 0;
dv1394src->port = 0;
dv1394src->channel = 63;
}
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) {
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) {
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));
unsigned char *ptr = (unsigned char *)&data[3];
GstBuffer *buf;
if (len > 16) {
/*fprintf(stderr,"section_type %d, dif_sequence %d, dif_block %d\n",ptr[0] >> 5,ptr[1] >> 4,ptr[2]); */
fprintf(stderr,".");
if (((ptr[0] >> 5) == 0) &&
((ptr[1] >> 4) == 0) && (ptr[2] == 0)) dv1394src->started = TRUE;
if (dv1394src->started) {
buf = gst_buffer_new();
GST_BUFFER_DATA(buf) = ptr;
GST_BUFFER_SIZE(buf) = 480;
GST_BUFFER_OFFSET(buf) = 0;
GST_BUFFER_FLAG_SET(buf,GST_BUFFER_DONTFREE);
dv1394src->buf = buf;
}
}
return 0;
}
static
int gst_dv1394src_bus_reset(raw1394handle_t handle) {
GST_INFO_ELEMENT(0,GST_DV1394SRC(raw1394_get_userdata(handle)),"have bus reset");
return 0;
}
static GstBuffer *
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 dv1394src->buf;
}
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:
if ((dv1394src->handle = raw1394_get_handle()) == NULL) {
GST_INFO_ELEMENT(0,dv1394src,"can't get raw1394 handle");
return GST_STATE_FAILURE;
}
raw1394_set_userdata(dv1394src->handle,dv1394src);
dv1394src->numcards = raw1394_get_port_info(dv1394src->handle,dv1394src->pinfo,16);
if (dv1394src->numcards == 0) {
GST_INFO_ELEMENT(0,dv1394src,"no cards available for raw1394");
return GST_STATE_FAILURE;
}
if (dv1394src->pinfo[dv1394src->card].nodes <= 1) {
GST_INFO_ELEMENT(0,dv1394src,"there are no nodes on the 1394 bus");
return GST_STATE_FAILURE;
}
if (raw1394_set_port(dv1394src->handle,dv1394src->port) < 0) {
GST_INFO_ELEMENT(0,dv1394src,"can't set 1394 port %d",dv1394src->port);
return GST_STATE_FAILURE;
}
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(0,"successfully opened up 1394 connection");
break;
case GST_STATE_PAUSED_TO_PLAYING:
if (raw1394_start_iso_rcv(dv1394src->handle,dv1394src->channel) < 0) {
GST_INFO_ELEMENT(0,dv1394src,"can't start 1394 iso receive");
return GST_STATE_FAILURE;
}
break;
case GST_STATE_PLAYING_TO_PAUSED:
raw1394_stop_iso_rcv(dv1394src->handle, dv1394src->channel);
break;
case GST_STATE_READY_TO_NULL:
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;
}