1 files changed, 83 insertions, 0 deletions
diff --git a/gr-audio/lib/portaudio/audio_portaudio_source.h b/gr-audio/lib/portaudio/audio_portaudio_source.h
new file mode 100644
index 000000000..245b3410b
--- /dev/null
+++ b/gr-audio/lib/portaudio/audio_portaudio_source.h
@@ -0,0 +1,83 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006-2011 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 <gr_audio_source.h>
+#include <gr_buffer.h>
+#include <gruel/thread.h>
+#include <string>
+#include <portaudio.h>
+#include <stdexcept>
+
+PaStreamCallback portaudio_source_callback;
+
+
+/*!
+ * \ Audio source using PORTAUDIO
+ *
+ * Input samples must be in the range [-1,1].
+ */
+class audio_portaudio_source : public audio_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:
+  audio_portaudio_source (int sampling_rate, const std::string device_name,
+			  bool ok_to_block);
+
+  ~audio_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);
+};
+
+#endif /* INCLUDED_AUDIO_PORTAUDIO_SOURCE_H */