gstreamer/ext/jack/gstjackbin.c

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/* -*- Mode: C; c-basic-offset: 4 -*- */
/*
Copyright (C) 2002 Andy Wingo <wingo@pobox.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU 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
General Public License for more details.
You should have received a copy of the GNU General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <string.h>
#include "gstjack.h"
static GstBinClass *parent_class = NULL;
static void gst_jack_bin_init(GstJackBin *this);
static void gst_jack_bin_class_init(GstJackBinClass *klass);
static GstElementStateReturn gst_jack_bin_change_state(GstElement *element);
/* jack callbacks */
static int process (nframes_t nframes, void *arg);
static int buffer_size (nframes_t nframes, void *arg);
static int sample_rate (nframes_t nframes, void *arg);
static void shutdown (void *arg);
GType
gst_jack_bin_get_type (void)
{
static GType jack_bin_type = 0;
if (!jack_bin_type) {
static const GTypeInfo jack_bin_info = {
sizeof(GstJackBinClass),
NULL,
NULL,
(GClassInitFunc)gst_jack_bin_class_init,
NULL,
NULL,
sizeof(GstJackBin),
0,
(GInstanceInitFunc)gst_jack_bin_init,
};
jack_bin_type = g_type_register_static (GST_TYPE_BIN, "GstJackBin", &jack_bin_info, 0);
}
return jack_bin_type;
}
static void
gst_jack_bin_class_init(GstJackBinClass *klass)
{
GObjectClass *object_class;
GstElementClass *element_class;
object_class = (GObjectClass *)klass;
element_class = (GstElementClass *)klass;
parent_class = g_type_class_ref(GST_TYPE_BIN);
element_class->change_state = gst_jack_bin_change_state;
}
static void
gst_jack_bin_init(GstJackBin *this)
{
GST_DEBUG (GST_CAT_THREAD, "initializing jack bin");
/* jack bins are managing bins and iterate themselves */
GST_FLAG_SET (this, GST_BIN_FLAG_MANAGER);
GST_FLAG_SET (this, GST_BIN_SELF_SCHEDULABLE);
/* make a new scheduler and associate it with the bin */
gst_scheduler_factory_make (NULL, GST_ELEMENT (this));
this->cond = g_cond_new ();
this->lock = g_mutex_new ();
g_mutex_lock (this->lock);
this->sched_setup = FALSE;
}
static GstElementStateReturn
gst_jack_bin_change_state (GstElement *element)
{
GstJackBin *this;
GList *l = NULL;
GstJackPad *pad;
g_return_val_if_fail (element != NULL, FALSE);
this = GST_JACK_BIN (element);
switch (GST_STATE_PENDING (element)) {
case GST_STATE_NULL:
g_message ("jack: NULL state");
if (this->client) {
g_message ("jack: closing client");
jack_client_close (this->client);
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
break;
case GST_STATE_READY:
g_message ("jack: READY");
if (!this->client) {
if (!(this->client = jack_client_new ("gst-jack"))) {
g_warning ("jack server not running?");
return GST_STATE_FAILURE;
}
jack_set_process_callback (this->client, process, this);
jack_set_buffer_size_callback (this->client, buffer_size, this);
jack_set_sample_rate_callback (this->client, sample_rate, this);
jack_on_shutdown (this->client, shutdown, this);
}
/* fixme: there are a *lot* of problems here */
if (GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_OPEN)) {
l = this->src_pads;
while (l) {
g_message ("jack: unregistering pad %s:%s", GST_JACK_PAD (l)->name, GST_JACK_PAD (l)->peer_name);
jack_port_unregister (this->client, GST_JACK_PAD (l)->port);
l = g_list_next (l);
}
l = this->sink_pads;
while (l) {
g_message ("jack: unregistering pad %s:%s", GST_JACK_PAD (l)->name, GST_JACK_PAD (l)->peer_name);
jack_port_unregister (this->client, GST_JACK_PAD (l)->port);
l = g_list_next (l);
}
GST_FLAG_UNSET (GST_OBJECT (this), GST_JACK_OPEN);
if (GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_ACTIVE)) {
g_message ("jack: deactivating client");
jack_deactivate (this->client);
GST_FLAG_UNSET (GST_OBJECT (this), GST_JACK_ACTIVE);
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
break;
case GST_STATE_PAUSED:
g_message ("jack: PAUSED");
if (!GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_OPEN)) {
l = this->src_pads;
while (l) {
pad = GST_JACK_PAD (l);
g_message ("jack: registering pad %s:%s", pad->name, pad->peer_name);
pad->port = jack_port_register (this->client, pad->name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0);
l = g_list_next (l);
}
l = this->sink_pads;
while (l) {
pad = GST_JACK_PAD (l);
g_message ("jack: registering pad %s:%s", pad->name, pad->peer_name);
pad->port = jack_port_register (this->client, pad->name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
l = g_list_next (l);
}
if (!GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_ACTIVE)) {
g_message ("jack: activating client");
jack_activate (this->client);
GST_FLAG_SET (GST_OBJECT (this), GST_JACK_ACTIVE);
}
g_cond_wait (this->cond, this->lock);
l = this->src_pads;
while (l) {
pad = GST_JACK_PAD (l);
g_message ("connecting gst jack port %s to jack port %s", jack_port_name (pad->port), pad->peer_name);
if (jack_connect (this->client, jack_port_name (pad->port), pad->peer_name)) {
g_warning ("could not connect %s and %s", pad->peer_name, jack_port_name (pad->port));
return GST_STATE_FAILURE;
}
l = g_list_next (l);
}
l = this->sink_pads;
while (l) {
pad = GST_JACK_PAD (l);
g_message ("connecting gst jack port %s to jack port %s", jack_port_name (pad->port), pad->peer_name);
if (jack_connect (this->client, jack_port_name (pad->port), pad->peer_name)) {
g_warning ("could not connect %s and %s", pad->peer_name, jack_port_name (pad->port));
return GST_STATE_FAILURE;
}
l = g_list_next (l);
}
g_message ("jack: setting OPEN flag");
GST_FLAG_SET (GST_OBJECT (this), GST_JACK_OPEN);
} else {
g_cond_wait (this->cond, this->lock);
}
break;
case GST_STATE_PLAYING:
g_message ("jack: PLAYING");
g_cond_wait (this->cond, this->lock);
break;
}
g_message ("jack: state change finished");
return GST_STATE_SUCCESS;
}
/* jack callbacks */
/* keep in mind that these run in another thread, mm-kay? */
static int
process (nframes_t nframes, void *arg)
{
GstJackBin *bin = (GstJackBin*) arg;
GstJackPad *pad;
GList *l;
g_assert (bin);
g_message ("jack: process()");
if (GST_STATE_PENDING (bin) != GST_STATE_VOID_PENDING) {
g_message ("jackbin: doing state change from %s to %s",
gst_element_state_get_name (GST_STATE (bin)),
gst_element_state_get_name (GST_STATE_PENDING (bin)));
/* FIXME: this breaks ultra-low latency... */
g_mutex_lock (bin->lock);
switch (GST_STATE_TRANSITION (bin)) {
case GST_STATE_READY_TO_PAUSED:
if (!bin->sched_setup) {
gst_scheduler_setup (GST_ELEMENT_SCHED (bin));
bin->sched_setup = TRUE;
}
break;
}
/* do the chaining up from within the jack thread, so that child
elements are initialized from within the proper thread */
if (GST_ELEMENT_CLASS (parent_class)->change_state)
GST_ELEMENT_CLASS (parent_class)->change_state (GST_ELEMENT_CAST (bin));
g_cond_signal (bin->cond);
g_mutex_unlock (bin->lock);
}
if (GST_STATE (bin) != GST_STATE_PLAYING) {
g_message ("jackbin: bin is not PLAYING yet, returning");
return 0;
}
l = bin->src_pads;
while (l) {
pad = GST_JACK_PAD (l);
pad->data = jack_port_get_buffer (pad->port, nframes);
l = g_list_next (l);
}
l = bin->sink_pads;
while (l) {
pad = GST_JACK_PAD (l);
pad->data = jack_port_get_buffer (pad->port, nframes);
l = g_list_next (l);
}
bin->nframes = nframes;
if (!gst_bin_iterate (GST_BIN_CAST (bin))) {
g_warning ("bin failed to iterate");
return -1;
}
/* that's all folks */
return 0;
}
static int
buffer_size (nframes_t nframes, void *arg)
{
printf ("the maximum buffer size is now %lu\n", nframes);
return 0;
}
static int
sample_rate (nframes_t nframes, void *arg)
{
GstJackBin *bin = (GstJackBin*) arg;
printf ("the sample rate is now %lu/sec\n", nframes);
bin->rate = nframes;
return 0;
}
static void
shutdown (void *arg)
{
/* GstJackClient *client = (GstJackClient*) arg; */
printf ("shutdown %p\n", arg);
/* gst_element_set_state (GST_ELEMENT (client->manager), GST_STATE_READY); */
}