gstreamer/ext/esd/esdsink.c

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/* 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 "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",
"Richard Boulton <richard-gst@tartarus.org>",
};
/* Signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_MUTE,
ARG_HOST,
ARG_SYNC,
ARG_FALLBACK
};
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 = 44100, " "channels = 2")
);
static void gst_esdsink_base_init (gpointer g_class);
static void gst_esdsink_class_init (gpointer g_class, gpointer class_data);
static void gst_esdsink_init (GTypeInstance * instance, gpointer g_class);
static gboolean gst_esdsink_open_audio (GstEsdsink * sink);
static void gst_esdsink_close_audio (GstEsdsink * sink);
static GstElementStateReturn gst_esdsink_change_state (GstElement * element);
static GstClockTime gst_esdsink_get_time (GstClock * clock, gpointer data);
static GstClock *gst_esdsink_get_clock (GstElement * element);
static void gst_esdsink_set_clock (GstElement * element, GstClock * clock);
static void gst_esdsink_chain (GstPad * pad, GstData * _data);
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;
/*static guint gst_esdsink_signals[LAST_SIGNAL] = { 0 }; */
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,
gst_esdsink_class_init,
NULL,
NULL,
sizeof (GstEsdsink),
0,
gst_esdsink_init,
};
esdsink_type =
g_type_register_static (GST_TYPE_ELEMENT, "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 (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
parent_class = g_type_class_peek_parent (g_class);
g_object_class_install_property (gobject_class, ARG_MUTE, g_param_spec_boolean ("mute", "mute", "mute", TRUE, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_HOST, g_param_spec_string ("host", "host", "host", NULL, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_SYNC,
g_param_spec_boolean ("sync", "sync", "Synchronize output to clock",
TRUE, G_PARAM_READWRITE));
#if 0
/* This option is disabled because it is dumb in GStreamer's architecture. */
g_object_class_install_property (gobject_class, ARG_FALLBACK,
g_param_spec_boolean ("fallback", "fallback",
"Fall back to using OSS if Esound daemon is not present", FALSE,
G_PARAM_READWRITE));
#endif
gobject_class->set_property = gst_esdsink_set_property;
gobject_class->get_property = gst_esdsink_get_property;
gstelement_class->change_state = gst_esdsink_change_state;
gstelement_class->set_clock = gst_esdsink_set_clock;
gstelement_class->get_clock = gst_esdsink_get_clock;
}
static void
gst_esdsink_init (GTypeInstance * instance, gpointer g_class)
{
GstEsdsink *esdsink = GST_ESDSINK (instance);
esdsink->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template
(GST_ELEMENT_GET_CLASS (instance), "sink"), "sink");
gst_element_add_pad (GST_ELEMENT (esdsink), esdsink->sinkpad);
gst_pad_set_chain_function (esdsink->sinkpad,
GST_DEBUG_FUNCPTR (gst_esdsink_chain));
GST_FLAG_SET (esdsink, GST_ELEMENT_EVENT_AWARE);
esdsink->mute = FALSE;
esdsink->fd = -1;
/* FIXME: get default from somewhere better than just putting them inline. */
/*esdsink->negotiated = FALSE; */
/* we have static caps on our template, so it always is negotiated */
esdsink->negotiated = TRUE;
esdsink->format = 16;
esdsink->depth = 16;
esdsink->channels = 2;
esdsink->frequency = 44100;
esdsink->bytes_per_sample = esdsink->channels * (esdsink->depth / 8);
esdsink->host = getenv ("ESPEAKER");
esdsink->provided_clock =
gst_audio_clock_new ("esdclock", gst_esdsink_get_time, esdsink);
gst_object_set_parent (GST_OBJECT (esdsink->provided_clock),
GST_OBJECT (esdsink));
esdsink->sync = TRUE;
esdsink->fallback = FALSE;
esdsink->link_open = FALSE;
}
#ifdef unused
static GstPadLinkReturn
gst_esdsink_link (GstPad * pad, const GstCaps * caps)
{
GstEsdsink *esdsink;
GstStructure *structure;
esdsink = GST_ESDSINK (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "depth", &esdsink->depth);
gst_structure_get_int (structure, "channels", &esdsink->channels);
gst_structure_get_int (structure, "rate", &esdsink->frequency);
esdsink->bytes_per_sample = esdsink->channels * (esdsink->depth / 8);
if (esdsink->link_open) {
gst_esdsink_close_audio (esdsink);
if (gst_esdsink_open_audio (esdsink)) {
esdsink->negotiated = TRUE;
esdsink->link_open = TRUE;
return GST_PAD_LINK_OK;
}
}
/* FIXME: is it supposed to be correct to have closed audio when caps nego
failed? */
GST_DEBUG ("esd link function could not negotiate, returning delayed");
return GST_PAD_LINK_REFUSED;
}
#endif
static GstClockTime
gst_esdsink_get_time (GstClock * clock, gpointer data)
{
GstEsdsink *esdsink = GST_ESDSINK (data);
GstClockTime res;
res = (esdsink->handled * GST_SECOND) / esdsink->frequency;
//- GST_SECOND * 2;
return res;
}
static GstClock *
gst_esdsink_get_clock (GstElement * element)
{
GstEsdsink *esdsink;
esdsink = GST_ESDSINK (element);
return GST_CLOCK (esdsink->provided_clock);
}
static void
gst_esdsink_set_clock (GstElement * element, GstClock * clock)
{
GstEsdsink *esdsink;
esdsink = GST_ESDSINK (element);
esdsink->clock = clock;
}
static void
gst_esdsink_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstEsdsink *esdsink;
esdsink = GST_ESDSINK (gst_pad_get_parent (pad));
if (!esdsink->negotiated) {
GST_ELEMENT_ERROR (esdsink, CORE, NEGOTIATION, (NULL),
("element wasn't negotiated before chain function"));
goto done;
}
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (esdsink->provided_clock),
FALSE);
gst_pad_event_default (pad, event);
return;
default:
gst_pad_event_default (pad, event);
return;
}
gst_event_unref (event);
return;
}
if (GST_BUFFER_DATA (buf) != NULL) {
if (!esdsink->mute && esdsink->fd >= 0) {
guchar *data = GST_BUFFER_DATA (buf);
gint size = GST_BUFFER_SIZE (buf);
gint to_write = 0;
to_write = size;
GST_LOG ("fd=%d data=%p size=%d",
esdsink->fd, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
while (to_write > 0) {
int done;
done = write (esdsink->fd, data, to_write);
if (done < 0) {
if (errno == EINTR) {
goto done;
}
/* connection closed? */
GST_ELEMENT_ERROR (esdsink, RESOURCE, WRITE, (NULL),
("communication with ESD failed"));
return;
}
to_write -= done;
data += done;
esdsink->handled += done / esdsink->bytes_per_sample;
}
}
}
gst_audio_clock_update_time ((GstAudioClock *) esdsink->provided_clock,
gst_esdsink_get_time (esdsink->provided_clock, esdsink));
done:
gst_buffer_unref (buf);
}
static void
gst_esdsink_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstEsdsink *esdsink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_ESDSINK (object));
esdsink = GST_ESDSINK (object);
switch (prop_id) {
case ARG_MUTE:
esdsink->mute = g_value_get_boolean (value);
break;
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;
case ARG_SYNC:
esdsink->sync = g_value_get_boolean (value);
break;
case ARG_FALLBACK:
esdsink->fallback = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_esdsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstEsdsink *esdsink;
esdsink = GST_ESDSINK (object);
switch (prop_id) {
case ARG_MUTE:
g_value_set_boolean (value, esdsink->mute);
break;
case ARG_HOST:
g_value_set_string (value, esdsink->host);
break;
case ARG_SYNC:
g_value_set_boolean (value, esdsink->sync);
break;
case ARG_FALLBACK:
g_value_set_boolean (value, esdsink->fallback);
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;
}
static gboolean
gst_esdsink_open_audio (GstEsdsink * sink)
{
/* Name used by esound for this connection. */
const char *connname = "GStreamer";
/* Bitmap describing audio format. */
esd_format_t esdformat = ESD_STREAM | ESD_PLAY;
g_return_val_if_fail (sink->fd == -1, FALSE);
if (sink->depth == 16)
esdformat |= ESD_BITS16;
else if (sink->depth == 8)
esdformat |= ESD_BITS8;
else {
GST_ELEMENT_ERROR (sink, STREAM, FORMAT, (NULL),
("invalid bit depth (%d)", sink->depth));
return FALSE;
}
if (sink->channels == 2)
esdformat |= ESD_STEREO;
else if (sink->channels == 1)
esdformat |= ESD_MONO;
else {
GST_ELEMENT_ERROR (sink, STREAM, FORMAT, (NULL),
("invalid number of channels (%d)", sink->channels));
return FALSE;
}
GST_INFO ("attempting to open connection to esound server");
if (sink->fallback) {
sink->fd =
esd_play_stream_fallback (esdformat, sink->frequency, sink->host,
connname);
} else {
sink->fd =
esd_play_stream (esdformat, sink->frequency, sink->host, connname);
}
if (sink->fd < 0) {
GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (NULL),
("can't open connection to esound server"));
return FALSE;
}
GST_INFO ("successfully opened connection to esound server");
return TRUE;
}
static void
gst_esdsink_close_audio (GstEsdsink * sink)
{
if (sink->fd < 0)
return;
close (sink->fd);
sink->fd = -1;
GST_INFO ("esdsink: closed sound device");
}
static GstElementStateReturn
gst_esdsink_change_state (GstElement * element)
{
GstEsdsink *esdsink;
esdsink = GST_ESDSINK (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
/* Open and close the link to test it's available */
if (!esdsink->link_open) {
if (!gst_esdsink_open_audio (GST_ESDSINK (element))) {
return GST_STATE_FAILURE;
}
gst_esdsink_close_audio (GST_ESDSINK (element));
}
break;
case GST_STATE_PAUSED_TO_PLAYING:
if (!esdsink->link_open) {
if (!gst_esdsink_open_audio (GST_ESDSINK (element))) {
return GST_STATE_FAILURE;
}
esdsink->link_open = TRUE;
}
gst_audio_clock_set_active (GST_AUDIO_CLOCK (esdsink->provided_clock),
TRUE);
break;
case GST_STATE_PLAYING_TO_PAUSED:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (esdsink->provided_clock),
FALSE);
if (esdsink->link_open) {
gst_esdsink_close_audio (GST_ESDSINK (element));
esdsink->link_open = FALSE;
}
esdsink->resync = TRUE;
break;
case GST_STATE_PAUSED_TO_READY:
/* Make doubly sure we don't leave our esd connection open
* or we'll block the other users
*/
if (esdsink->link_open) {
gst_esdsink_close_audio (GST_ESDSINK (element));
esdsink->link_open = FALSE;
}
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}