gstreamer/ext/esd/esdsink.c

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/* GStreamer
* Copyright (C) <2005> Arwed v. Merkatz <v.merkatz@gmx.net>
*
* Roughly based on the gstreamer 0.8 esdsink plugin:
* Copyright (C) <2001> Richard Boulton <richard-gst@tartarus.org>
*
* esdsink.c: an EsounD audio sink
*
* 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 "esdsink.h"
#include <esd.h>
#include <unistd.h>
#include <errno.h>
GST_DEBUG_CATEGORY_EXTERN (esd_debug);
#define GST_CAT_DEFAULT esd_debug
/* elementfactory information */
static GstElementDetails esdsink_details = {
"Esound audio sink",
"Sink/Audio",
"Plays audio to an esound server",
"Arwed von Merkatz <v.merkatz@gmx.net>",
};
enum
{
ARG_0,
ARG_HOST
};
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, 2 ]; "
"audio/x-raw-int, "
"signed = (boolean) { true, false }, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
);
static void gst_esdsink_base_init (gpointer g_class);
static void gst_esdsink_class_init (GstEsdSinkClass * klass);
static void gst_esdsink_init (GstEsdSink * esdsink);
static void gst_esdsink_dispose (GObject * object);
static GstCaps *gst_esdsink_getcaps (GstBaseSink * bsink);
static gboolean gst_esdsink_open (GstAudioSink * asink);
static gboolean gst_esdsink_close (GstAudioSink * asink);
static gboolean gst_esdsink_prepare (GstAudioSink * asink,
GstRingBufferSpec * spec);
static gboolean gst_esdsink_unprepare (GstAudioSink * asink);
static guint gst_esdsink_write (GstAudioSink * asink, gpointer data,
guint length);
static guint gst_esdsink_delay (GstAudioSink * asink);
static void gst_esdsink_reset (GstAudioSink * asink);
static void gst_esdsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_esdsink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstElementClass *parent_class = NULL;
GType
gst_esdsink_get_type (void)
{
static GType esdsink_type = 0;
if (!esdsink_type) {
static const GTypeInfo esdsink_info = {
sizeof (GstEsdSinkClass),
gst_esdsink_base_init,
NULL,
(GClassInitFunc) gst_esdsink_class_init,
NULL,
NULL,
sizeof (GstEsdSink),
0,
(GInstanceInitFunc) gst_esdsink_init,
};
esdsink_type =
g_type_register_static (GST_TYPE_AUDIO_SINK, "GstEsdSink",
&esdsink_info, 0);
}
return esdsink_type;
}
static void
gst_esdsink_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 (&sink_factory));
gst_element_class_set_details (element_class, &esdsink_details);
}
static void
gst_esdsink_class_init (GstEsdSinkClass * klass)
{
GObjectClass *gobject_class;
GstBaseSinkClass *gstbasesink_class;
GstBaseAudioSinkClass *gstbaseaudiosink_class;
GstAudioSinkClass *gstaudiosink_class;
gobject_class = (GObjectClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
gstaudiosink_class = (GstAudioSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_AUDIO_SINK);
gobject_class->dispose = gst_esdsink_dispose;
gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_esdsink_getcaps);
gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_esdsink_open);
gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_esdsink_close);
gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_esdsink_prepare);
gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_esdsink_unprepare);
gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_esdsink_write);
gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_esdsink_delay);
gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_esdsink_reset);
gobject_class->set_property = gst_esdsink_set_property;
gobject_class->get_property = gst_esdsink_get_property;
g_object_class_install_property (gobject_class, ARG_HOST,
g_param_spec_string ("host", "host", "host", NULL, G_PARAM_READWRITE));
}
static void
gst_esdsink_init (GstEsdSink * esdsink)
{
esdsink->fd = -1;
esdsink->ctrl_fd = -1;
esdsink->host = g_strdup (getenv ("ESPEAKER"));
}
static void
gst_esdsink_dispose (GObject * object)
{
GstEsdSink *esdsink = GST_ESDSINK (object);
g_free (esdsink->host);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstCaps *
gst_esdsink_getcaps (GstBaseSink * bsink)
{
GstEsdSink *esdsink;
GstPadTemplate *pad_template;
GstCaps *caps = NULL;
gint i;
esd_server_info_t *server_info;
GST_DEBUG ("getcaps called");
esdsink = GST_ESDSINK (bsink);
pad_template = gst_static_pad_template_get (&sink_factory);
caps = gst_caps_copy (gst_pad_template_get_caps (pad_template));
if (esdsink->ctrl_fd < 0) {
return caps;
}
server_info = esd_get_server_info (esdsink->ctrl_fd);
if (server_info) {
GST_DEBUG ("got server info rate: %i", server_info->rate);
for (i = 0; i < caps->structs->len; i++) {
GstStructure *s;
s = gst_caps_get_structure (caps, i);
gst_structure_set (s, "rate", G_TYPE_INT, server_info->rate, NULL);
}
esd_free_server_info (server_info);
return caps;
} else {
GST_WARNING_OBJECT (esdsink, "couldn't get server info!");
gst_caps_unref (caps);
return NULL;
}
}
static gboolean
gst_esdsink_open (GstAudioSink * asink)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
esdsink->ctrl_fd = esd_open_sound (esdsink->host);
if (esdsink->ctrl_fd < 0)
goto couldnt_connect;
return TRUE;
couldnt_connect:
{
GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE, (NULL),
("can't open connection to esound server"));
return FALSE;
}
}
static gboolean
gst_esdsink_close (GstAudioSink * asink)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
esd_close (esdsink->ctrl_fd);
return TRUE;
}
static gboolean
gst_esdsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
/* Name used by esound for this connection. */
const char connname[] = "GStreamer";
/* Bitmap describing audio format. */
esd_format_t esdformat = ESD_STREAM | ESD_PLAY;
if (spec->depth == 16)
esdformat |= ESD_BITS16;
else if (spec->depth == 8) {
esdformat |= ESD_BITS8;
}
if (spec->channels == 2)
esdformat |= ESD_STEREO;
else if (spec->channels == 1) {
esdformat |= ESD_MONO;
}
GST_INFO ("attempting to open data connection to esound server");
esdsink->fd =
esd_play_stream (esdformat, spec->rate, esdsink->host, connname);
if ((esdsink->fd < 0) || (esdsink->ctrl_fd < 0)) {
GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE, (NULL),
("can't open connection to esound server"));
return FALSE;
}
GST_INFO ("successfully opened connection to esound server");
return TRUE;
}
static gboolean
gst_esdsink_unprepare (GstAudioSink * asink)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
if ((esdsink->fd < 0) && (esdsink->ctrl_fd < 0))
return TRUE;
close (esdsink->fd);
esdsink->fd = -1;
GST_INFO ("esdsink: closed sound device");
return TRUE;
}
static guint
gst_esdsink_write (GstAudioSink * asink, gpointer data, guint length)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
gint to_write = 0;
to_write = length;
while (to_write > 0) {
int done;
done = write (esdsink->fd, data, to_write);
if (done < 0) {
GST_ELEMENT_ERROR (esdsink, RESOURCE, WRITE,
("Failed to write data to the esound daemon"), GST_ERROR_SYSTEM);
return 0;
}
to_write -= done;
data += done;
}
return length;
}
static guint
gst_esdsink_delay (GstAudioSink * asink)
{
GstEsdSink *esdsink = GST_ESDSINK (asink);
guint latency = esd_get_latency (esdsink->ctrl_fd);
GST_DEBUG ("got latency: %u", latency);
return latency;
}
static void
gst_esdsink_reset (GstAudioSink * asink)
{
GST_DEBUG ("reset called");
}
static void
gst_esdsink_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstEsdSink *esdsink = GST_ESDSINK (object);
switch (prop_id) {
case ARG_HOST:
g_free (esdsink->host);
if (g_value_get_string (value) == NULL)
esdsink->host = NULL;
else
esdsink->host = g_strdup (g_value_get_string (value));
break;
default:
break;
}
}
static void
gst_esdsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstEsdSink *esdsink = GST_ESDSINK (object);
switch (prop_id) {
case ARG_HOST:
g_value_set_string (value, esdsink->host);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_esdsink_factory_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "esdsink", GST_RANK_NONE,
GST_TYPE_ESDSINK))
return FALSE;
return TRUE;
}