1 files changed, 86 insertions, 0 deletions
diff --git a/gr-audio/lib/jack/jack_source.h b/gr-audio/lib/jack/jack_source.h
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+++ b/gr-audio/lib/jack/jack_source.h
@@ -0,0 +1,86 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005-2011,2013 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 3, 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., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDED_AUDIO_JACK_SOURCE_H
+#define INCLUDED_AUDIO_JACK_SOURCE_H
+
+#include <audio/source.h>
+#include <jack/jack.h>
+#include <jack/ringbuffer.h>
+#include <string>
+#include <stdexcept>
+
+namespace gr {
+  namespace audio {
+
+    int jack_source_process(jack_nframes_t nframes, void *arg);
+
+    /*!
+     * \brief audio source using JACK
+     * \ingroup audio_blk
+     *
+     * The source has one input stream of floats.
+     *
+     * Output samples will be in the range [-1,1].
+     */
+    class jack_source : public source 
+    {
+      friend int jack_source_process(jack_nframes_t nframes, void *arg);
+
+      // typedef for pointer to class work method
+      typedef int(jack_source::*work_t)(int noutput_items,
+                                        gr_vector_const_void_star &input_items,
+                                        gr_vector_void_star &output_items);
+
+      unsigned int d_sampling_rate;
+      std::string  d_device_name;
+      bool         d_ok_to_block;
+
+      jack_client_t     *d_jack_client;
+      jack_port_t       *d_jack_input_port;
+      jack_ringbuffer_t *d_ringbuffer;
+      jack_nframes_t     d_jack_buffer_size;
+      pthread_cond_t     d_ringbuffer_ready;
+      pthread_mutex_t    d_jack_process_lock;
+
+      // random stats
+      int d_noverruns;  // count of overruns
+
+      void output_error_msg(const char *msg, int err);
+      void bail(const char *msg, int err) throw (std::runtime_error);
+
+    public:
+      jack_source(int sampling_rate,
+                  const std::string device_name,
+                  bool ok_to_block);
+      ~jack_source();
+
+      bool check_topology(int ninputs, int noutputs);
+
+      int work(int noutput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace audio */
+} /* namespace gr */
+
+#endif /* INCLUDED_AUDIO_JACK_SOURCE_H */