Finally we're on to a proper jack setup, with a specialized bin and elements that can only go in a jack bin. I had to...

Original commit message from CVS:
Finally we're on to a proper jack setup, with a specialized bin and elements
that can only go in a jack bin. I had to fix the parser first to do this, but
to run it, the syntax is like so:

gst-launch jackbin.( filesrc ! mad ! jacksink )

But of course it's not fully functional yet. Sigh.

1 files changed, 250 insertions, 0 deletions

diff --git a/ext/jack/gstjackbin.c b/ext/jack/gstjackbin.c
new file mode 100644
index 00000000..8a4cc763
--- /dev/null
+++ b/ext/jack/gstjackbin.c
@@ -0,0 +1,250 @@
+/*
+    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 "gstjack.h"
+
+
+static GstBinClass *parent_class = NULL;
+
+static void gst_jack_bin_init(GstJack *this);
+static void gst_jack_bin_class_init(GstJackClass *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(GstJackClass *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(GstJack *this)
+{
+}
+
+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);
+        }
+            
+        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);
+        }
+        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);
+                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 ("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);
+                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);
+        }
+
+        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);
+        }
+        break;
+    case GST_STATE_PLAYING:
+        g_message ("jack: PLAYING");
+        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);
+        }
+        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;
+}
+
+/* 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()");
+
+    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); */
+}
+