gstreamer/ext/jack/gstjack.c
Jan Schmidt 012dfb8b33 Fix up all the state change functions.
Original commit message from CVS:
Fix up all the state change functions.
2005-09-05 17:20:29 +00:00

534 lines
14 KiB
C

/* -*- Mode: C; c-basic-offset: 4 -*- */
/*
Copyright (C) 2002, 2003 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "gstjack.h"
#include <gst/audio/audio.h>
/* TODO:
- 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
*/
/* elementfactory information */
static GstElementDetails gst_jack_bin_details = {
"Jack Bin",
"Generic/Bin",
"Jack processing bin",
"Andy Wingo <wingo@pobox.com>",
};
static GstElementDetails gst_jack_sink_details = {
"Jack Sink",
"Sink/Audio",
"Output to a Jack processing network",
"Andy Wingo <wingo@pobox.com>",
};
static GstElementDetails gst_jack_src_details = {
"Jack Src",
"Source/Audio",
"Input from a Jack processing network",
"Andy Wingo <wingo@pobox.com>",
};
static GHashTable *port_name_counts = NULL;
static GstElementClass *parent_class = NULL;
static void gst_jack_base_init (gpointer g_class);
static void gst_jack_src_base_init (gpointer g_class);
static void gst_jack_sink_base_init (gpointer g_class);
static void gst_jack_init (GstJack * this);
static void gst_jack_class_init (GstJackClass * klass);
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 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 GstStateChangeReturn gst_jack_change_state (GstElement * element,
GstStateChange transition);
static GstPadLinkReturn gst_jack_link (GstPad * pad, const 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),
gst_jack_base_init,
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),
gst_jack_sink_base_init,
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),
gst_jack_src_base_init,
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 void
gst_jack_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_jack_bin_details);
}
static void
gst_jack_src_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_jack_src_request_pad_factory ());
gst_element_class_set_details (element_class, &gst_jack_src_details);
}
static void
gst_jack_sink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_jack_sink_request_pad_factory ());
gst_element_class_set_details (element_class, &gst_jack_sink_details);
}
static void
gst_jack_class_init (GstJackClass * klass)
{
GObjectClass *object_class;
GstElementClass *element_class;
GParamSpec *pspec;
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-";
pspec = g_param_spec_string ("port-name-prefix", "Port name prefix",
"String to prepend to jack port names",
prefix, G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
g_object_class_install_property (object_class, ARG_PORT_NAME_PREFIX, pspec);
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 void
gst_jack_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstJack *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 = (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 GstPadTemplate *
gst_jack_src_request_pad_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
GstCaps *caps;
caps = gst_caps_from_string (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS);
template = gst_pad_template_new ("%s", GST_PAD_SRC, GST_PAD_REQUEST, caps);
}
return template;
}
static GstPadTemplate *
gst_jack_sink_request_pad_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
GstCaps *caps;
caps = gst_caps_from_string (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS);
template = gst_pad_template_new ("%s", GST_PAD_SINK, GST_PAD_REQUEST, caps);
}
return template;
}
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 (GST_IS_JACK (element), NULL);
this = GST_JACK (element);
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:playback_1");
else
newname = g_strdup ("alsa_pcm:capture_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_link_function (pad->pad, gst_jack_link);
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 GstStateChangeReturn
gst_jack_change_state (GstElement * element, GstStateChange transition)
{
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:
JACK_DEBUG ("%s: NULL", GST_OBJECT_NAME (GST_OBJECT (this)));
break;
case GST_STATE_READY:
JACK_DEBUG ("%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 (element));
return GST_STATE_CHANGE_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);
JACK_DEBUG ("%s: appending pad %s:%s to list", GST_OBJECT_NAME (this),
pad->name, pad->peer_name);
*pads = g_list_append (*pads, pad);
l = g_list_next (l);
}
}
break;
case GST_STATE_PAUSED:
JACK_DEBUG ("%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_caps_copy (gst_pad_get_negotiated_caps (pad->pad));
gst_caps_set_simple (caps,
"rate", G_TYPE_INT, (int) this->bin->rate,
"buffer-frames", G_TYPE_INT, (gint) this->bin->nframes, NULL);
if (gst_pad_try_set_caps (pad->pad, caps) <= 0)
return GST_STATE_CHANGE_FAILURE;
l = g_list_next (l);
}
}
break;
case GST_STATE_PLAYING:
JACK_DEBUG ("%s: PLAYING", GST_OBJECT_NAME (GST_OBJECT (this)));
break;
}
JACK_DEBUG ("%s: state change finished", GST_OBJECT_NAME (this));
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
static GstPadLinkReturn
gst_jack_link (GstPad * pad, const GstCaps * caps)
{
GstJack *this;
gint rate, buffer_frames;
GstStructure *structure;
this = GST_JACK (GST_OBJECT_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "rate", &rate);
gst_structure_get_int (structure, "buffer-frames", &buffer_frames);
if (this->bin && (rate != this->bin->rate ||
buffer_frames != this->bin->nframes))
return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static void
gst_jack_loop (GstElement * element)
{
GstJack *this;
GList *pads;
gint len;
GstJackPad *pad;
GstBuffer *buffer;
this = GST_JACK (element);
len = this->bin->nframes * sizeof (sample_t);
pads = this->pads;
while (pads) {
pad = GST_JACK_PAD (pads);
if (this->direction == GST_PAD_SINK) {
buffer = GST_BUFFER (gst_pad_pull (pad->pad));
if (GST_IS_EVENT (buffer)) {
GstEvent *event = GST_EVENT (buffer);
switch (GST_EVENT_TYPE (buffer)) {
case GST_EVENT_EOS:
gst_element_set_eos (element);
gst_event_unref (event);
return;
default:
gst_pad_event_default (pad->pad, event);
return;
}
}
/* if the other plugins only give out buffer-frames or less (as
they should), if the length of the GstBuffer is different
from nframes then the buffer is short and we will get EOS
next */
memcpy (pad->data, GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer));
if (len != GST_BUFFER_SIZE (buffer))
memset (pad->data + GST_BUFFER_SIZE (buffer), 0,
len - GST_BUFFER_SIZE (buffer));
gst_buffer_unref (buffer);
} else {
buffer = gst_buffer_new ();
gst_buffer_set_data (buffer, pad->data, len);
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_DONTFREE);
gst_pad_push (pad->pad, GST_DATA (buffer));
}
pads = g_list_next (pads);
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "jackbin", GST_RANK_NONE,
GST_TYPE_JACK_BIN))
return FALSE;
if (!gst_element_register (plugin, "jacksrc", GST_RANK_NONE,
GST_TYPE_JACK_SRC))
return FALSE;
if (!gst_element_register (plugin, "jacksink", GST_RANK_NONE,
GST_TYPE_JACK_SINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"jack",
"Jack Plugin Library", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)