1 files changed, 89 insertions, 0 deletions
diff --git a/gr-audio/lib/portaudio/portaudio_source.h b/gr-audio/lib/portaudio/portaudio_source.h
new file mode 100644
index 0000000000..d4f4f01d1f
--- /dev/null
+++ b/gr-audio/lib/portaudio/portaudio_source.h
@@ -0,0 +1,89 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006-2011,2013 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_PORTAUDIO_SOURCE_H
+#define INCLUDED_AUDIO_PORTAUDIO_SOURCE_H
+
+#include <audio/source.h>
+#include <gr_buffer.h>
+#include <gruel/thread.h>
+#include <string>
+#include <portaudio.h>
+#include <stdexcept>
+
+namespace gr {
+  namespace audio {
+
+    PaStreamCallback portaudio_source_callback;
+
+    /*!
+     * \brief Audio source using PORTAUDIO
+     * \ingroup audio_blk
+     *
+     * Input samples must be in the range [-1,1].
+     */
+    class portaudio_source : public source
+    {
+      friend PaStreamCallback portaudio_source_callback;
+
+      unsigned int d_sampling_rate;
+      std::string  d_device_name;
+      bool         d_ok_to_block;
+      bool         d_verbose;
+
+      unsigned int d_portaudio_buffer_size_frames; // number of frames in a portaudio buffer
+
+      PaStream           *d_stream;
+      PaStreamParameters  d_input_parameters;
+
+      gr_buffer_sptr        d_writer;  // buffer used between work and callback
+      gr_buffer_reader_sptr d_reader;
+
+      gruel::mutex              d_ringbuffer_mutex;
+      gruel::condition_variable d_ringbuffer_cond;
+      bool                      d_ringbuffer_ready;
+
+      // 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);
+      void create_ringbuffer();
+
+    public:
+      portaudio_source(int sampling_rate,
+                       const std::string device_name,
+                       bool ok_to_block);
+
+      ~portaudio_source();
+
+      bool check_topology(int ninputs, int noutputs);
+
+      int work(int ninput_items,
+               gr_vector_const_void_star &input_items,
+               gr_vector_void_star &output_items);
+    };
+
+  } /* namespace audio */
+} /* namespace gr */
+
+#endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */