Houston, we have a trunk.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 231 insertions, 0 deletions

diff --git a/gr-audio-jack/src/audio_jack_sink.cc b/gr-audio-jack/src/audio_jack_sink.cc
new file mode 100644
index 000000000..b5a8373ec
--- /dev/null
+++ b/gr-audio-jack/src/audio_jack_sink.cc
@@ -0,0 +1,231 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  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 <audio_jack_sink.h>
+#include <gr_io_signature.h>
+#include <gr_prefs.h>
+#include <stdio.h>
+#include <iostream>
+#include <stdexcept>
+#include <gri_jack.h>
+
+#ifndef NO_PTHREAD
+#include <pthread.h>
+#endif
+
+typedef jack_default_audio_sample_t sample_t;
+
+
+// Number of jack buffers in the ringbuffer
+// TODO: make it to match at least the quantity of items passed by work()
+static const unsigned int N_BUFFERS = 16;
+
+static std::string 
+default_device_name ()
+{
+  return gr_prefs::singleton()->get_string("audio_jack", "default_output_device", "gr_sink");
+}
+
+int
+jack_sink_process (jack_nframes_t nframes, void *arg)
+{
+  audio_jack_sink *self = (audio_jack_sink *)arg;
+  unsigned int read_size = nframes*sizeof(sample_t);
+
+  if (jack_ringbuffer_read_space (self->d_ringbuffer) < read_size) {
+    self->d_nunderuns++;
+    // FIXME: move this fputs out, we shouldn't use blocking calls in process()
+    fputs ("jU", stderr);
+    return 0;
+  }
+
+  char *buffer = (char *) jack_port_get_buffer (self->d_jack_output_port, nframes);
+
+  jack_ringbuffer_read (self->d_ringbuffer, buffer, read_size);
+
+#ifndef NO_PTHREAD
+  // Tell the sink thread there is room in the ringbuffer.
+  // If it is already running, the lock will not be available.
+  // We can't wait here in the process() thread, but we don't
+  // need to signal in that case, because the sink thread will 
+  // check for room availability.
+
+  if (pthread_mutex_trylock (&self->d_jack_process_lock) == 0) {
+    pthread_cond_signal (&self->d_ringbuffer_ready);
+    pthread_mutex_unlock (&self->d_jack_process_lock);
+  }
+#endif
+
+  return 0;
+}
+
+// ----------------------------------------------------------------
+
+audio_jack_sink_sptr
+audio_jack_make_sink(int sampling_rate, const std::string dev, bool ok_to_block)
+{
+  return audio_jack_sink_sptr (new audio_jack_sink (sampling_rate, dev,
+						    ok_to_block));
+}
+
+audio_jack_sink::audio_jack_sink (int sampling_rate,
+				  const std::string device_name,
+				  bool ok_to_block)
+  : gr_sync_block ("audio_jack_sink",
+		   gr_make_io_signature (0, 0, 0),
+		   gr_make_io_signature (0, 0, 0)),
+    d_sampling_rate (sampling_rate),
+    d_device_name (device_name.empty() ? default_device_name() : device_name),
+    d_ok_to_block (ok_to_block),
+    d_jack_client (0),
+    d_ringbuffer (0),
+    d_nunderuns (0)
+{
+#ifndef NO_PTHREAD
+    pthread_cond_init(&d_ringbuffer_ready, NULL);;
+    pthread_mutex_init(&d_jack_process_lock, NULL);
+#endif
+
+  // try to become a client of the JACK server
+  if ((d_jack_client = jack_client_new (d_device_name.c_str ())) == 0) {
+    fprintf (stderr, "audio_jack_sink[%s]: jack server not running?\n",
+	     d_device_name.c_str());
+    throw std::runtime_error ("audio_jack_sink");
+  }
+
+  // tell the JACK server to call `jack_sink_process()' whenever
+  // there is work to be done.
+  jack_set_process_callback (d_jack_client, &jack_sink_process, (void*)this);
+
+  // tell the JACK server to call `jack_shutdown()' if
+  // it ever shuts down, either entirely, or if it
+  // just decides to stop calling us.
+
+  //jack_on_shutdown (d_jack_client, &jack_shutdown, (void*)this);
+ 
+  d_jack_output_port = 
+    jack_port_register (d_jack_client, "out", 
+			JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
+
+
+  d_jack_buffer_size = jack_get_buffer_size (d_jack_client);
+
+  set_output_multiple (d_jack_buffer_size);
+
+  d_ringbuffer =
+    jack_ringbuffer_create (N_BUFFERS*d_jack_buffer_size*sizeof(sample_t));
+  if (d_ringbuffer == NULL)
+    bail ("jack_ringbuffer_create failed", 0);
+
+  assert(sizeof(float)==sizeof(sample_t));
+  set_input_signature (gr_make_io_signature (1, 1, sizeof (sample_t)));
+
+
+  jack_nframes_t sample_rate = jack_get_sample_rate (d_jack_client);
+
+  if ((jack_nframes_t)sampling_rate != sample_rate){
+    fprintf (stderr, "audio_jack_sink[%s]: unable to support sampling rate %d\n",
+	     d_device_name.c_str (), sampling_rate);
+    fprintf (stderr, "  card requested %d instead.\n", sample_rate);
+  }
+}
+
+
+bool
+audio_jack_sink::check_topology (int ninputs, int noutputs)
+{
+  if (ninputs != 1)
+    return false;
+
+  // tell the JACK server that we are ready to roll 
+  if (jack_activate (d_jack_client))
+    throw std::runtime_error ("audio_jack_sink");
+
+  return true;
+}
+
+audio_jack_sink::~audio_jack_sink ()
+{
+  jack_client_close (d_jack_client);
+  jack_ringbuffer_free (d_ringbuffer);
+}
+
+int
+audio_jack_sink::work (int noutput_items,
+		       gr_vector_const_void_star &input_items,
+		       gr_vector_void_star &output_items)
+{
+  // write_size and work_size are in bytes
+  int work_size = noutput_items*sizeof(sample_t);
+  unsigned int write_size;
+
+  while (work_size > 0) {
+    unsigned int write_space;	// bytes
+
+#ifdef NO_PTHREAD
+    while ((write_space=jack_ringbuffer_write_space (d_ringbuffer)) < 
+	   d_jack_buffer_size*sizeof(sample_t)) {
+      usleep(1000000*((d_jack_buffer_size-write_space/sizeof(sample_t))/d_sampling_rate));
+    }
+#else
+    // JACK actually requires POSIX
+
+    pthread_mutex_lock (&d_jack_process_lock);
+    while ((write_space=jack_ringbuffer_write_space (d_ringbuffer)) < 
+	   d_jack_buffer_size*sizeof(sample_t)) {
+
+      // wait until jack_sink_process() signals more room
+      pthread_cond_wait (&d_ringbuffer_ready, &d_jack_process_lock);
+    }
+    pthread_mutex_unlock (&d_jack_process_lock);
+#endif
+
+    write_space -= write_space%(d_jack_buffer_size*sizeof(sample_t));
+    write_size = std::min(write_space, (unsigned int)work_size);
+
+    if (jack_ringbuffer_write (d_ringbuffer, (char *) input_items[0],
+			       write_size) < write_size) {
+      bail ("jack_ringbuffer_write failed", 0);
+    }
+    work_size -= write_size;
+  }
+
+  return noutput_items;
+}
+
+void
+audio_jack_sink::output_error_msg (const char *msg, int err)
+{
+  fprintf (stderr, "audio_jack_sink[%s]: %s: %d\n",
+	   d_device_name.c_str (), msg,  err);
+}
+
+void
+audio_jack_sink::bail (const char *msg, int err) throw (std::runtime_error)
+{
+  output_error_msg (msg, err);
+  throw std::runtime_error ("audio_jack_sink");
+}