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>
/* 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 = [ 8000, 96000 ], "
"channels = [ 1, 2 ]; "
"audio/x-raw-int, "
"signed = (boolean) FALSE, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = [ 8000, 96000 ], "
"channels = [ 1, 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 GstPadLinkReturn gst_esdsink_link (GstPad *pad, const GstCaps *caps);
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",
FALSE,G_PARAM_READWRITE));
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));
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_pad_set_link_function(esdsink->sinkpad, gst_esdsink_link);
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;
esdsink->format = -1;
esdsink->depth = -1;
esdsink->channels = -1;
esdsink->frequency = -1;
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 = FALSE;
esdsink->fallback = FALSE;
}
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);
gst_esdsink_close_audio (esdsink);
if (gst_esdsink_open_audio (esdsink)) {
esdsink->negotiated = TRUE;
return GST_PAD_LINK_OK;
}
/* FIXME: is it supposed to be correct to have closed audio when caps nego
failed? */
return GST_PAD_LINK_REFUSED;
}
static int
gst_esdsink_get_latency (GstEsdsink *esdsink)
{
/* esd_get_latency() doesn't actually work. So we return a
* fake value */
return 44100/2;
#if 0
return esd_get_latency (esdsink->fd);
#endif
}
static GstClockTime
gst_esdsink_get_time (GstClock *clock, gpointer data)
{
GstEsdsink *esdsink = GST_ESDSINK(data);
GstClockTime res;
res = (esdsink->handled - gst_esdsink_get_latency(esdsink))
* GST_SECOND / esdsink->frequency;
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 (GST_ELEMENT (esdsink), "not negotiated");
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;
case GST_EVENT_DISCONTINUOUS:
{
gint64 value;
if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &value)) {
if (!gst_clock_handle_discont (esdsink->clock, value)){
gst_audio_clock_set_active (GST_AUDIO_CLOCK (esdsink->provided_clock),
FALSE);
}
esdsink->handled = 0;
}
esdsink->resync = TRUE;
break;
}
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;
if (esdsink->clock){
gint delay = 0;
gint64 queued;
GstClockTimeDiff jitter;
delay = gst_esdsink_get_latency (esdsink);
queued = delay * GST_SECOND / esdsink->frequency;
if (esdsink->resync && esdsink->sync) {
GstClockID id = gst_clock_new_single_shot_id (esdsink->clock,
GST_BUFFER_TIMESTAMP (buf) - queued);
gst_element_clock_wait (GST_ELEMENT (esdsink), id, &jitter);
gst_clock_id_free (id);
if (jitter >= 0){
gst_clock_handle_discont (esdsink->clock,
GST_BUFFER_TIMESTAMP (buf) - queued + jitter);
to_write = size;
gst_audio_clock_set_active ((GstAudioClock *)esdsink->provided_clock, TRUE);
esdsink->resync = FALSE;
}
}else{
to_write = size;
}
}
GST_DEBUG ("esdsink: 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;
}
g_assert_not_reached();
}
to_write -= done;
data += done;
esdsink->handled += done / esdsink->bytes_per_sample;
}
}
}
gst_audio_clock_update_time ((GstAudioClock *)esdsink->provided_clock,
GST_BUFFER_TIMESTAMP (buf));
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_DEBUG ("esdsink: 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_DEBUG ("esdsink: invalid number of channels (%d)", sink->channels);
return FALSE;
}
GST_DEBUG ("esdsink: 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_DEBUG ("esdsink: can't open connection to esound server");
return FALSE;
}
return TRUE;
}
static void
gst_esdsink_close_audio (GstEsdsink *sink)
{
if (sink->fd < 0)
return;
close(sink->fd);
sink->fd = -1;
GST_DEBUG ("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:
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (esdsink->provided_clock),
FALSE);
esdsink->resync = TRUE;
break;
case GST_STATE_PAUSED_TO_READY:
gst_esdsink_close_audio (GST_ESDSINK (element));
esdsink->negotiated = 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;
}