mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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245 lines
7.1 KiB
C
245 lines
7.1 KiB
C
/* Gnome-Streamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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#include "gstdv1394src.h"
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/* Filter signals and args */
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enum {
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/* FILL ME */
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LAST_SIGNAL
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};
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enum {
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ARG_0
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};
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static GstPadTemplate*
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gst_dv1394src_factory (void)
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{
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static GstPadTemplate *template = NULL;
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if (!template) {
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template = gst_padtemplate_new (
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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gst_caps_new (
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"dv1394src",
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"video/dv",
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gst_props_new (
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"format", GST_PROPS_STRING ("NTSC"),
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NULL)),
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NULL);
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}
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return template;
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}
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static void gst_dv1394src_class_init (GstDV1394SrcClass *klass);
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static void gst_dv1394src_init (GstDV1394Src *filter);
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static void gst_dv1394src_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
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static void gst_dv1394src_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
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static GstElementStateReturn gst_dv1394src_change_state (GstElement *element);
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static GstBuffer * gst_dv1394src_get (GstPad *pad);
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static GstElementClass *parent_class = NULL;
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//static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_dv1394src_get_type(void) {
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static GType gst_dv1394src_type = 0;
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if (!gst_dv1394src_type) {
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static const GTypeInfo gst_dv1394src_info = {
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sizeof(GstDV1394Src), NULL,
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NULL,
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(GClassInitFunc)gst_dv1394src_class_init,
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NULL,
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NULL,
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sizeof(GstDV1394Src),
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0,
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(GInstanceInitFunc)gst_dv1394src_init,
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};
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gst_dv1394src_type = g_type_register_static(GST_TYPE_ELEMENT, "DV1394Src", &gst_dv1394src_info, 0);
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}
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return gst_dv1394src_type;
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}
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static void
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gst_dv1394src_class_init (GstDV1394SrcClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
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gobject_class->set_property = gst_dv1394src_set_property;
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gobject_class->get_property = gst_dv1394src_get_property;
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gstelement_class->change_state = gst_dv1394src_change_state;
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}
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static void
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gst_dv1394src_init (GstDV1394Src *dv1394src)
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{
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dv1394src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_pad_set_get_function (dv1394src->srcpad, gst_dv1394src_get);
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gst_element_add_pad (GST_ELEMENT (dv1394src), dv1394src->srcpad);
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dv1394src->card = 0;
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dv1394src->port = 0;
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dv1394src->channel = 63;
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}
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static void
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gst_dv1394src_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstDV1394Src *filter;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_DV1394SRC(object));
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filter = GST_DV1394SRC(object);
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switch (prop_id) {
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default:
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break;
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}
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}
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static void
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gst_dv1394src_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstDV1394Src *filter;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_DV1394SRC(object));
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filter = GST_DV1394SRC(object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static
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int gst_dv1394src_iso_receive(raw1394handle_t handle,int channel,size_t len,quadlet_t *data) {
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GstDV1394Src *dv1394src = GST_DV1394SRC (raw1394_get_userdata(handle));
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unsigned char *ptr = (unsigned char *)&data[3];
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GstBuffer *buf;
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if (len > 16) {
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//fprintf(stderr,"section_type %d, dif_sequence %d, dif_block %d\n",ptr[0] >> 5,ptr[1] >> 4,ptr[2]);
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fprintf(stderr,".");
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if (((ptr[0] >> 5) == 0) &&
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((ptr[1] >> 4) == 0) && (ptr[2] == 0)) dv1394src->started = TRUE;
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if (dv1394src->started) {
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buf = gst_buffer_new();
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GST_BUFFER_DATA(buf) = ptr;
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GST_BUFFER_SIZE(buf) = 480;
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GST_BUFFER_OFFSET(buf) = 0;
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GST_BUFFER_FLAG_SET(buf,GST_BUFFER_DONTFREE);
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dv1394src->buf = buf;
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}
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}
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return 0;
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}
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static
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int gst_dv1394src_bus_reset(raw1394handle_t handle) {
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GST_INFO_ELEMENT(0,GST_DV1394SRC(raw1394_get_userdata(handle)),"have bus reset");
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return 0;
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}
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static GstBuffer *
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gst_dv1394src_get (GstPad *pad)
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{
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GstDV1394Src *dv1394src = GST_DV1394SRC (GST_PAD_PARENT(pad));
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dv1394src->buf = NULL;
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while (dv1394src->buf == NULL)
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raw1394_loop_iterate(dv1394src->handle);
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return dv1394src->buf;
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}
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static GstElementStateReturn
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gst_dv1394src_change_state (GstElement *element)
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{
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GstDV1394Src *dv1394src;
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g_return_val_if_fail (GST_IS_DV1394SRC (element), GST_STATE_FAILURE);
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dv1394src = GST_DV1394SRC (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_NULL_TO_READY:
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if ((dv1394src->handle = raw1394_get_handle()) == NULL) {
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GST_INFO_ELEMENT(0,dv1394src,"can't get raw1394 handle");
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return GST_STATE_FAILURE;
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}
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raw1394_set_userdata(dv1394src->handle,dv1394src);
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dv1394src->numcards = raw1394_get_port_info(dv1394src->handle,dv1394src->pinfo,16);
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if (dv1394src->numcards == 0) {
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GST_INFO_ELEMENT(0,dv1394src,"no cards available for raw1394");
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return GST_STATE_FAILURE;
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}
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if (dv1394src->pinfo[dv1394src->card].nodes <= 1) {
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GST_INFO_ELEMENT(0,dv1394src,"there are no nodes on the 1394 bus");
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return GST_STATE_FAILURE;
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}
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if (raw1394_set_port(dv1394src->handle,dv1394src->port) < 0) {
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GST_INFO_ELEMENT(0,dv1394src,"can't set 1394 port %d",dv1394src->port);
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return GST_STATE_FAILURE;
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}
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raw1394_set_iso_handler(dv1394src->handle,dv1394src->channel,gst_dv1394src_iso_receive);
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raw1394_set_bus_reset_handler(dv1394src->handle,gst_dv1394src_bus_reset);
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dv1394src->started = FALSE;
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GST_DEBUG(0,"successfully opened up 1394 connection");
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break;
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case GST_STATE_PAUSED_TO_PLAYING:
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if (raw1394_start_iso_rcv(dv1394src->handle,dv1394src->channel) < 0) {
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GST_INFO_ELEMENT(0,dv1394src,"can't start 1394 iso receive");
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return GST_STATE_FAILURE;
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}
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break;
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case GST_STATE_PLAYING_TO_PAUSED:
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raw1394_stop_iso_rcv(dv1394src->handle, dv1394src->channel);
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break;
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case GST_STATE_READY_TO_NULL:
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raw1394_destroy_handle(dv1394src->handle);
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break;
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default:
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break;
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}
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/* if we haven't failed already, give the parent class a chance to ;-) */
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element);
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return GST_STATE_SUCCESS;
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}
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