gstreamer/ext/artsd/gstartsdsink.c

347 lines
10 KiB
C

/* GStreamer
* Copyright (C) <2001> Richard Boulton <richard-gst@tartarus.org>
*
* Based on example.c:
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstartsdsink.h"
#include <gst/audio/audio.h>
/* Signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_MUTE,
ARG_NAME
};
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS)
);
static void gst_artsdsink_base_init (gpointer g_class);
static void gst_artsdsink_class_init (GstArtsdsinkClass * klass);
static void gst_artsdsink_init (GstArtsdsink * artsdsink);
static gboolean gst_artsdsink_open_audio (GstArtsdsink * sink);
static void gst_artsdsink_close_audio (GstArtsdsink * sink);
static GstStateChangeReturn gst_artsdsink_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_artsdsink_sync_parms (GstArtsdsink * artsdsink);
static GstPadLinkReturn gst_artsdsink_link (GstPad * pad, const GstCaps * caps);
static void gst_artsdsink_chain (GstPad * pad, GstData * _data);
static void gst_artsdsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_artsdsink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
/*static guint gst_artsdsink_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_artsdsink_get_type (void)
{
static GType artsdsink_type = 0;
if (!artsdsink_type) {
static const GTypeInfo artsdsink_info = {
sizeof (GstArtsdsinkClass),
gst_artsdsink_base_init,
NULL,
(GClassInitFunc) gst_artsdsink_class_init,
NULL,
NULL,
sizeof (GstArtsdsink),
0,
(GInstanceInitFunc) gst_artsdsink_init,
};
artsdsink_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstArtsdsink",
&artsdsink_info, 0);
}
return artsdsink_type;
}
static void
gst_artsdsink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_element_class_set_details_simple (element_class, "aRtsd audio sink",
"Sink/Audio",
"Plays audio to an aRts server",
"Richard Boulton <richard-gst@tartarus.org>");
}
static void
gst_artsdsink_class_init (GstArtsdsinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
/* FIXME: add long property descriptions */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MUTE,
g_param_spec_boolean ("mute", "mute", "mute", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* FIXME: rename to e.g. "client-name" */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NAME,
g_param_spec_string ("name", "name", "name", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gobject_class->set_property = gst_artsdsink_set_property;
gobject_class->get_property = gst_artsdsink_get_property;
gstelement_class->change_state = gst_artsdsink_change_state;
}
static void
gst_artsdsink_init (GstArtsdsink * artsdsink)
{
artsdsink->sinkpad =
gst_pad_new_from_template (gst_element_get_pad_template (GST_ELEMENT
(artsdsink), "sink"), "sink");
gst_element_add_pad (GST_ELEMENT (artsdsink), artsdsink->sinkpad);
gst_pad_set_chain_function (artsdsink->sinkpad, gst_artsdsink_chain);
gst_pad_set_link_function (artsdsink->sinkpad, gst_artsdsink_link);
artsdsink->connected = FALSE;
artsdsink->mute = FALSE;
artsdsink->connect_name = NULL;
}
static gboolean
gst_artsdsink_sync_parms (GstArtsdsink * artsdsink)
{
g_return_val_if_fail (artsdsink != NULL, FALSE);
g_return_val_if_fail (GST_IS_ARTSDSINK (artsdsink), FALSE);
if (!artsdsink->connected)
return TRUE;
/* Need to set stream to use new parameters: only way to do this is to reopen. */
gst_artsdsink_close_audio (artsdsink);
return gst_artsdsink_open_audio (artsdsink);
}
static GstPadLinkReturn
gst_artsdsink_link (GstPad * pad, const GstCaps * caps)
{
GstArtsdsink *artsdsink = GST_ARTSDSINK (gst_pad_get_parent (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "rate", &artsdsink->frequency);
gst_structure_get_int (structure, "depth", &artsdsink->depth);
gst_structure_get_int (structure, "signed", &artsdsink->signd);
gst_structure_get_int (structure, "channels", &artsdsink->channels);
if (gst_artsdsink_sync_parms (artsdsink))
return GST_PAD_LINK_OK;
return GST_PAD_LINK_REFUSED;
}
static void
gst_artsdsink_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstArtsdsink *artsdsink;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
artsdsink = GST_ARTSDSINK (gst_pad_get_parent (pad));
if (GST_BUFFER_DATA (buf) != NULL) {
gst_trace_add_entry (NULL, 0, GPOINTER_TO_INT (buf),
"artsdsink: writing to server");
if (!artsdsink->mute && artsdsink->connected) {
int bytes;
void *bufptr = GST_BUFFER_DATA (buf);
int bufsize = GST_BUFFER_SIZE (buf);
GST_DEBUG ("artsdsink: stream=%p data=%p size=%d",
artsdsink->stream, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
do {
bytes = arts_write (artsdsink->stream, bufptr, bufsize);
if (bytes < 0) {
fprintf (stderr, "arts_write error: %s\n", arts_error_text (bytes));
gst_buffer_unref (buf);
return;
}
bufptr += bytes;
bufsize -= bytes;
} while (bufsize > 0);
}
}
gst_buffer_unref (buf);
}
static void
gst_artsdsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstArtsdsink *artsdsink;
g_return_if_fail (GST_IS_ARTSDSINK (object));
artsdsink = GST_ARTSDSINK (object);
switch (prop_id) {
case ARG_MUTE:
artsdsink->mute = g_value_get_boolean (value);
break;
case ARG_NAME:
if (artsdsink->connect_name != NULL)
g_free (artsdsink->connect_name);
if (g_value_get_string (value) == NULL)
artsdsink->connect_name = NULL;
else
artsdsink->connect_name = g_strdup (g_value_get_string (value));
break;
default:
break;
}
}
static void
gst_artsdsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstArtsdsink *artsdsink;
g_return_if_fail (GST_IS_ARTSDSINK (object));
artsdsink = GST_ARTSDSINK (object);
switch (prop_id) {
case ARG_MUTE:
g_value_set_boolean (value, artsdsink->mute);
break;
case ARG_NAME:
g_value_set_string (value, artsdsink->connect_name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "artsdsink", GST_RANK_NONE,
GST_TYPE_ARTSDSINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"artsdsink",
"Plays audio to an aRts server",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
static gboolean gst_artsdsink_open_audio (GstArtsdsink * sink)
{
const char connname[] = "gstreamer";
int errcode;
/* Name used by aRtsd for this connection. */
if (sink->connect_name != NULL)
connname = sink->connect_name;
/* FIXME: this should only ever happen once per process. */
/* Really, artsc needs to be made thread safe to fix this (and other related */
/* problems). */
errcode = arts_init ();
if (errcode < 0) {
fprintf (stderr, "arts_init error: %s\n", arts_error_text (errcode));
return FALSE;
}
GST_DEBUG ("artsdsink: attempting to open connection to aRtsd server");
sink->stream = arts_play_stream (sink->frequency, sink->depth,
sink->channels, connname);
/* FIXME: check connection */
/* GST_DEBUG ("artsdsink: can't open connection to aRtsd server"); */
GST_OBJECT_FLAG_SET (sink, GST_ARTSDSINK_OPEN);
sink->connected = TRUE;
return TRUE;
}
static void
gst_artsdsink_close_audio (GstArtsdsink * sink)
{
if (!sink->connected)
return;
arts_close_stream (sink->stream);
arts_free ();
GST_OBJECT_FLAG_UNSET (sink, GST_ARTSDSINK_OPEN);
sink->connected = FALSE;
g_print ("artsdsink: closed connection\n");
}
static GstStateChangeReturn
gst_artsdsink_change_state (GstElement * element, GstStateChange transition)
{
g_return_val_if_fail (GST_IS_ARTSDSINK (element), FALSE);
/* if going down into NULL state, close the stream if it's open */
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_OBJECT_FLAG_IS_SET (element, GST_ARTSDSINK_OPEN))
gst_artsdsink_close_audio (GST_ARTSDSINK (element));
/* otherwise (READY or higher) we need to open the stream */
} else {
if (!GST_OBJECT_FLAG_IS_SET (element, GST_ARTSDSINK_OPEN)) {
if (!gst_artsdsink_open_audio (GST_ARTSDSINK (element)))
return GST_STATE_CHANGE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}