gstreamer/ext/jack/gstjack.c
Andy Wingo 30e825ae1a make jack work in all its full duplex glory
Original commit message from CVS:
make jack work in all its full duplex glory
2002-07-02 23:35:07 +00:00

520 lines
16 KiB
C

/* -*- 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"
#include <gst/audio/audio.h>
/* TODO:
this element is still nonfunctional
- work out the src side (caps setting, etc)
future core TODO:
- make a jack clock provider
- add GST_ELEMENT_FIXED_DATA_RATE, GST_ELEMENT_QOS,
GST_ELEMENT_CHANGES_DATA_RATE element flags, and make the scheduler
sensitive to them
*/
static GstElementDetails gst_jack_bin_details = {
"Jack Bin",
"Generic/Bin",
"Jack processing bin: see README for more info",
VERSION,
"Andy Wingo <wingo@pobox.com>",
"(C) 2002 "
};
static GstElementDetails gst_jack_sink_details = {
"Jack Sink",
"Sink/Audio",
"Output to a Jack processing network: see README for more info",
VERSION,
"Andy Wingo <wingo@pobox.com>",
"(C) 2002 "
};
static GstElementDetails gst_jack_src_details = {
"Jack Src",
"Source/Audio",
"Input from a Jack processing network: see README for more info",
VERSION,
"Andy Wingo <wingo@pobox.com>",
"(C) 2002",
};
static GHashTable *port_name_counts = NULL;
static GstElementClass *parent_class = NULL;
static void gst_jack_init(GstJack *this);
static void gst_jack_class_init(GstJackClass *klass);
static GstPadTemplate *gst_jack_src_request_pad_factory();
static GstPadTemplate *gst_jack_sink_request_pad_factory();
static GstPad* gst_jack_request_new_pad (GstElement *element, GstPadTemplate *templ, const
gchar *name);
static void gst_jack_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_jack_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static GstElementStateReturn gst_jack_change_state(GstElement *element);
static GstPadConnectReturn gst_jack_connect (GstPad *pad, GstCaps *caps);
static void gst_jack_loop (GstElement *element);
enum {
ARG_0,
ARG_PORT_NAME_PREFIX,
};
GType
gst_jack_get_type (void)
{
static GType jack_type = 0;
if (!jack_type) {
static const GTypeInfo jack_info = {
sizeof(GstJackClass),
NULL,
NULL,
NULL,
NULL,
NULL,
sizeof(GstJack),
0,
NULL,
};
jack_type = g_type_register_static (GST_TYPE_ELEMENT, "GstJack", &jack_info, 0);
}
return jack_type;
}
GType
gst_jack_sink_get_type (void)
{
static GType jack_type = 0;
if (!jack_type) {
static const GTypeInfo jack_info = {
sizeof(GstJackClass),
NULL,
NULL,
(GClassInitFunc)gst_jack_class_init,
NULL,
NULL,
sizeof(GstJack),
0,
(GInstanceInitFunc)gst_jack_init,
};
jack_type = g_type_register_static (GST_TYPE_JACK, "GstJackSink", &jack_info, 0);
}
return jack_type;
}
GType
gst_jack_src_get_type (void)
{
static GType jack_type = 0;
if (!jack_type) {
static const GTypeInfo jack_info = {
sizeof(GstJackClass),
NULL,
NULL,
(GClassInitFunc)gst_jack_class_init,
NULL,
NULL,
sizeof(GstJack),
0,
(GInstanceInitFunc)gst_jack_init,
};
jack_type = g_type_register_static (GST_TYPE_JACK, "GstJackSrc", &jack_info, 0);
}
return jack_type;
}
static GstPadTemplate*
gst_jack_src_request_pad_factory(void)
{
static GstPadTemplate *template = NULL;
if (!template)
template = gst_pad_template_new("%s", GST_PAD_SRC, GST_PAD_REQUEST,
gst_caps_new("src", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
NULL);
return template;
}
static GstPadTemplate*
gst_jack_sink_request_pad_factory(void)
{
static GstPadTemplate *template = NULL;
if (!template)
template = gst_pad_template_new("%s", GST_PAD_SINK, GST_PAD_REQUEST,
gst_caps_new("sink", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
NULL);
return template;
}
static void
gst_jack_class_init(GstJackClass *klass)
{
GObjectClass *object_class;
GstElementClass *element_class;
gchar *prefix;
object_class = (GObjectClass *)klass;
element_class = (GstElementClass *)klass;
if (parent_class == NULL)
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
object_class->get_property = gst_jack_get_property;
object_class->set_property = gst_jack_set_property;
if (GST_IS_JACK_SINK_CLASS (klass))
prefix = "gst-out-";
else
prefix = "gst-in-";
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_PORT_NAME_PREFIX,
g_param_spec_string("port-name-prefix","Port name prefix",
"String to prepend to jack port names",
prefix,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
element_class->change_state = gst_jack_change_state;
element_class->request_new_pad = gst_jack_request_new_pad;
}
static void
gst_jack_init(GstJack *this)
{
if (G_OBJECT_TYPE (this) == GST_TYPE_JACK_SRC) {
this->direction = GST_PAD_SRC;
} else if (G_OBJECT_TYPE (this) == GST_TYPE_JACK_SINK) {
this->direction = GST_PAD_SINK;
} else {
g_assert_not_reached ();
}
gst_element_set_loop_function(GST_ELEMENT(this), gst_jack_loop);
}
static GstPad*
gst_jack_request_new_pad (GstElement *element, GstPadTemplate *templ, const gchar *name)
{
GstJack *this;
gchar *newname;
GList *l, **pad_list;
GstJackPad *pad;
gint count;
g_return_val_if_fail ((this = GST_JACK (element)), NULL);
if (!this->bin)
pad_list = &this->pads;
else if (this->direction == GST_PAD_SRC)
pad_list = &this->bin->src_pads;
else
pad_list = &this->bin->sink_pads;
if (name) {
l = *pad_list;
while (l) {
if (strcmp (GST_JACK_PAD(l)->name, name) == 0) {
g_warning("requested port name %s already in use.", name);
return NULL;
}
l = l->next;
}
newname = g_strdup (name);
} else {
if (this->direction == GST_PAD_SINK)
newname = g_strdup ("alsa_pcm:out_1");
else
newname = g_strdup ("alsa_pcm:in_1");
}
pad = g_new0(GstJackPad, 1);
if (!port_name_counts)
port_name_counts = g_hash_table_new (g_str_hash, g_str_equal);
count = GPOINTER_TO_INT (g_hash_table_lookup (port_name_counts, this->port_name_prefix));
g_hash_table_insert (port_name_counts, g_strdup (this->port_name_prefix), GINT_TO_POINTER (count+1));
pad->name = g_strdup_printf ("%s%d", this->port_name_prefix, count);
pad->peer_name = newname;
pad->pad = gst_pad_new_from_template (templ, newname);
gst_element_add_pad (GST_ELEMENT (this), pad->pad);
gst_pad_set_connect_function (pad->pad, gst_jack_connect);
this->pads = g_list_append (this->pads, pad);
g_print ("returning from request_new_pad, pad %s created, to connect to %s\n", pad->name, pad->peer_name);
return pad->pad;
}
static void
gst_jack_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstJack *this;
this = (GstJack *)object;
switch (prop_id) {
case ARG_PORT_NAME_PREFIX:
if (this->port_name_prefix)
g_free (this->port_name_prefix);
this->port_name_prefix = g_strdup (g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
return;
}
}
static void
gst_jack_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstJack *this;
this = (GstJack *)object;
switch (prop_id) {
case ARG_PORT_NAME_PREFIX:
g_value_set_string (value, this->port_name_prefix);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_jack_change_state (GstElement *element)
{
GstJack *this;
GList *l = NULL, **pads;
GstJackPad *pad;
GstCaps *caps;
g_return_val_if_fail (element != NULL, FALSE);
this = GST_JACK (element);
switch (GST_STATE_PENDING (element)) {
case GST_STATE_NULL:
g_message ("jack client %s: NULL", GST_OBJECT_NAME (GST_OBJECT (this)));
break;
case GST_STATE_READY:
g_message ("jack client %s: READY", GST_OBJECT_NAME (GST_OBJECT (this)));
if (!this->bin) {
if (!(this->bin = (GstJackBin*)gst_element_get_managing_bin (element))
|| !GST_IS_JACK_BIN (this->bin)) {
this->bin = NULL;
g_warning ("jack element %s needs to be contained in a jack bin.",
GST_OBJECT_NAME (GST_OBJECT (element)));
return GST_STATE_FAILURE;
}
/* fixme: verify that all names are unique */
l = this->pads;
pads = (this->direction == GST_PAD_SRC) ? &this->bin->src_pads : &this->bin->sink_pads;
while (l) {
pad = GST_JACK_PAD (l);
g_message ("jack: appending pad %s:%s to list", pad->name, pad->peer_name);
*pads = g_list_append (*pads, pad);
l = g_list_next (l);
}
}
break;
case GST_STATE_PAUSED:
g_message ("jack client %s: PAUSED", GST_OBJECT_NAME (GST_OBJECT (this)));
if (GST_STATE (element) == GST_STATE_READY) {
/* we're in READY->PAUSED */
l = this->pads;
while (l) {
pad = GST_JACK_PAD (l);
caps = gst_pad_get_caps (pad->pad);
gst_caps_set (caps, "rate", GST_PROPS_INT_TYPE, (gint) this->bin->rate, NULL);
caps->fixed = TRUE; /* we know this to be true */
if (!gst_pad_try_set_caps (pad->pad, caps))
return GST_STATE_FAILURE;
l = g_list_next (l);
}
}
break;
case GST_STATE_PLAYING:
g_message ("jack client %s: PLAYING", GST_OBJECT_NAME (GST_OBJECT (this)));
break;
}
g_message ("jack: state change finished");
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static GstPadConnectReturn
gst_jack_connect (GstPad *pad, GstCaps *caps)
{
GstJack *this;
gint rate;
this = GST_JACK (gst_pad_get_parent (pad));
g_return_val_if_fail (this != NULL, GST_PAD_CONNECT_REFUSED);
g_return_val_if_fail (GST_IS_JACK (this), GST_PAD_CONNECT_REFUSED);
if (GST_CAPS_IS_FIXED (caps)) {
gst_caps_get_int (caps, "rate", &rate);
if (this->bin && rate != this->bin->rate)
return GST_PAD_CONNECT_REFUSED;
return GST_PAD_CONNECT_OK;
}
return GST_PAD_CONNECT_DELAYED;
}
static void
gst_jack_loop (GstElement *element)
{
GstJack *this;
GList *pads;
gint len, peeked_len;
gchar *peeked;
gint avail;
GstEvent *event;
GstJackPad *pad;
GstBuffer *buffer;
this = GST_JACK (element);
g_return_if_fail(this != NULL);
len = this->bin->nframes * sizeof (jack_default_audio_sample_t);
do {
pads = this->pads;
while (pads) {
pad = GST_JACK_PAD (pads);
if (this->direction == GST_PAD_SINK) {
if (!pad->bs)
pad->bs = gst_bytestream_new (pad->pad);
read:
peeked_len = gst_bytestream_peek_bytes (pad->bs, (guint8**)&peeked, len);
if (peeked_len < len) {
gst_bytestream_get_status(pad->bs, &avail, &event);
if (event) {
g_warning("got an event on jacksink");
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
/* really, we should just cut this pad out of the graph. let
* me know when this is needed ;)
* also, for sample accuracy etc, we should play avail
* bytes, but hey. */
gst_element_set_eos (element);
gst_event_free (event);
gst_element_yield (element); /* shouldn't return */
return;
}
goto read;
} else {
/* the element at the top of the chain did not emit an eos
* event. this is a Bug(tm) */
g_assert_not_reached();
}
}
memcpy (pad->data, peeked, peeked_len);
gst_bytestream_flush (pad->bs, peeked_len);
} else {
buffer = gst_buffer_new ();
GST_BUFFER_DATA (buffer) = pad->data;
GST_BUFFER_SIZE (buffer) = len;
GST_BUFFER_MAXSIZE (buffer) = len;
gst_pad_push (pad->pad, buffer);
}
pads = g_list_next (pads);
}
gst_element_yield (element);
} while (TRUE);
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
if (!gst_library_load ("gstbytestream")) {
gst_info("jack: could not load support library: 'gstbytestream'\n");
return FALSE;
}
factory = gst_element_factory_new ("jackbin", GST_TYPE_JACK_BIN, &gst_jack_bin_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
factory = gst_element_factory_new ("jacksrc", GST_TYPE_JACK_SRC, &gst_jack_src_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, gst_jack_src_request_pad_factory());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
factory = gst_element_factory_new ("jacksink", GST_TYPE_JACK_SINK, &gst_jack_sink_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, gst_jack_sink_request_pad_factory());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
gst_plugin_set_longname(plugin, "JACK plugin library");
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"jack",
plugin_init
};