gnuradio-examples: add C++ audio examples using new gr-audio

* gnuradio-examples/C++/audio/dial_tone

8 files changed, 89 insertions, 147 deletions

diff --git a/gnuradio-examples/c++/Makefile.am b/gnuradio-examples/c++/Makefile.am
index 43c63847a..5a49e0e89 100644
--- a/gnuradio-examples/c++/Makefile.am
+++ b/gnuradio-examples/c++/Makefile.am
@@ -1,5 +1,5 @@
 #
-# Copyright 2006,2008 Free Software Foundation, Inc.
+# Copyright 2011 Free Software Foundation, Inc.
 # 
 # This file is part of GNU Radio
 # 
@@ -20,4 +20,4 @@
 # 
 
 include $(top_srcdir)/Makefile.common
-#SUBDIRS = dial_tone
+SUBDIRS = audio
diff --git a/gnuradio-examples/c++/dial_tone/.gitignore b/gnuradio-examples/c++/audio/.gitignore
index c5e345858..bb08aaf91 100644
--- a/gnuradio-examples/c++/dial_tone/.gitignore
+++ b/gnuradio-examples/c++/audio/.gitignore
@@ -1,5 +1,3 @@
-/.deps
-/.libs
 /Makefile
 /Makefile.in
 /dial_tone
diff --git a/gnuradio-examples/c++/dial_tone/Makefile.am b/gnuradio-examples/c++/audio/Makefile.am
index 188275fca..88bd7c1fd 100644
--- a/gnuradio-examples/c++/dial_tone/Makefile.am
+++ b/gnuradio-examples/c++/audio/Makefile.am
@@ -1,5 +1,5 @@
 #
-# Copyright 2006,2008,2009,2010 Free Software Foundation, Inc.
+# Copyright 2011 Free Software Foundation, Inc.
 # 
 # This file is part of GNU Radio
 # 
@@ -21,25 +21,18 @@
 
 include $(top_srcdir)/Makefile.common
 
-# For compiling within the GNU Radio build tree
+# For compiling with the GNU Radio build tree, use include dir below.
+# For compiling outside the tree, use 'pkg-config --cflags gnuradio-audio'
 AM_CPPFLAGS = \
-	-I$(top_srcdir)/gr-audio-alsa/src \
+	-I$(top_srcdir)/gr-audio/include \
 	$(STD_DEFINES_AND_INCLUDES) \
 	$(WITH_INCLUDES)
 
-GR_AUDIO_ALSA_LA=$(top_builddir)/gr-audio-alsa/src/libgnuradio-audio-alsa.la
-
-# For compiling outside the tree, these will get fished out by pkgconfig
+# For compiling within the GNU Radio build tree, link against GR_AUDIO_LA
+# For compiling outside the tree, use 'pkg-config --libs gnuradio-audio'
+GR_AUDIO_LA=$(top_builddir)/gr-audio/lib/libgnuradio-audio.la
 
 noinst_PROGRAMS = dial_tone
 
-noinst_HEADERS = \
-    dial_tone.h
-
-dial_tone_SOURCES = \
-    dial_tone.cc	   \
-    main.cc
-
-dial_tone_LDADD = \
-    $(GNURADIO_CORE_LA) \
-    $(GR_AUDIO_ALSA_LA)
+dial_tone_SOURCES = dial_tone.cc
+dial_tone_LDADD = $(GNURADIO_CORE_LA) $(GR_AUDIO_LA)
diff --git a/gnuradio-examples/c++/audio/dial_tone.cc b/gnuradio-examples/c++/audio/dial_tone.cc
new file mode 100644
index 000000000..e4e3d8ceb
--- /dev/null
+++ b/gnuradio-examples/c++/audio/dial_tone.cc
@@ -0,0 +1,78 @@
+/*
+ * Copyright 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.
+ */
+
+
+/*
+ * GNU Radio C++ example creating dial tone
+ * ("the simplest thing that could possibly work")
+ *
+ * Send a tone each to the left and right channels of stereo audio
+ * output and let the user's brain sum them.
+ *
+ * GNU Radio makes extensive use of Boost shared pointers.  Signal processing
+ * blocks are typically created by calling a "make" factory function, which
+ * returns an instance of the block as a typedef'd shared pointer that can
+ * be used in any way a regular pointer can.  Shared pointers created this way
+ * keep track of their memory and free it at the right time, so the user
+ * doesn't need to worry about it (really).
+ *
+ */
+
+// Include header files for each block used in flowgraph
+#include <gr_top_block.h>
+#include <gr_sig_source_f.h>
+#include <gr_audio_sink.h>
+
+int main(int argc, char **argv)
+{
+  int rate = 48000;		// Audio card sample rate
+  float ampl = 0.1;		// Don't exceed 0.5 or clipping will occur
+
+  // Construct a top block that will contain flowgraph blocks.  Alternatively,
+  // one may create a derived class from gr_top_block and hold instantiated blocks
+  // as member data for later manipulation.
+  gr_top_block_sptr tb = gr_make_top_block("dial_tone");
+
+  // Construct a real-valued signal source for each tone, at given sample rate
+  gr_sig_source_f_sptr src0 = gr_make_sig_source_f(rate, GR_SIN_WAVE, 350, ampl);
+  gr_sig_source_f_sptr src1 = gr_make_sig_source_f(rate, GR_SIN_WAVE, 440, ampl);
+
+  // Construct an audio sink to accept audio tones
+  audio_sink::sptr sink = audio_make_sink(rate);
+
+  // Connect output #0 of src0 to input #0 of sink (left channel)
+  tb->connect(src0, 0, sink, 0);
+
+  // Connect output #0 of src1 to input #1 of sink (right channel)
+  tb->connect(src1, 0, sink, 1);
+
+  // Tell GNU Radio runtime to start flowgraph threads; the foreground thread
+  // will block until either flowgraph exits (this example doesn't) or the
+  // application receives SIGINT (e.g., user hits CTRL-C).
+  //
+  // Real applications may use tb->start() which returns, allowing the foreground
+  // thread to proceed, then later use tb->stop(), followed by tb->wait(), to cleanup
+  // GNU Radio before exiting.
+  tb->run();
+
+  // Exit normally.
+  return 0;
+}
diff --git a/gnuradio-examples/c++/dial_tone/README b/gnuradio-examples/c++/dial_tone/README
deleted file mode 100644
index 6d5ed5059..000000000
--- a/gnuradio-examples/c++/dial_tone/README
+++ /dev/null
@@ -1,16 +0,0 @@
-This example requires that gr-audio-alsa be built in the main tree in order
-to compile successfully.  It is not built automatically.
-
-To build this example, you must make two modifications to the build system:
-
-1) Add the following line inside config/grc_gnuradio_examples.m4:
-
-   gnuradio-examples/c++/dial_tone/Makefile
-   
-   ...to the list of Makefiles already in there.
-   
-2) In gnuradio-examples/c++/Makefile.am, uncomment the SUBDIRS line
-
-# SUBDIRS = dial_tone
-
-Then, from the top-level directory, re-run ./bootstrap and ./configure.
\ No newline at end of file
diff --git a/gnuradio-examples/c++/dial_tone/dial_tone.cc b/gnuradio-examples/c++/dial_tone/dial_tone.cc
deleted file mode 100644
index 9a2772a18..000000000
--- a/gnuradio-examples/c++/dial_tone/dial_tone.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright 2006,2008 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.
- */
-
-#include <dial_tone.h>
-#include <gr_io_signature.h>
-#include <gr_sig_source_f.h>
-#include <audio_alsa_sink.h>
-
-// Shared pointer constructor
-dial_tone_sptr make_dial_tone()
-{
-  return gnuradio::get_initial_sptr(new dial_tone());
-}
-
-// Hierarchical block constructor, with no inputs or outputs
-dial_tone::dial_tone() : 
-    gr_top_block("dial_tone")
-{
-    gr_sig_source_f_sptr src0 = gr_make_sig_source_f(48000, GR_SIN_WAVE, 350, 0.1);
-    gr_sig_source_f_sptr src1 = gr_make_sig_source_f(48000, GR_SIN_WAVE, 440, 0.1);
-    audio_alsa_sink_sptr sink = audio_alsa_make_sink(48000);
-
-    connect(src0, 0, sink, 0);
-    connect(src1, 0, sink, 1);
-}
diff --git a/gnuradio-examples/c++/dial_tone/dial_tone.h b/gnuradio-examples/c++/dial_tone/dial_tone.h
deleted file mode 100644
index c645439bb..000000000
--- a/gnuradio-examples/c++/dial_tone/dial_tone.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright 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 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.
- */
-
-#include <gr_top_block.h>
-
-class dial_tone;
-typedef boost::shared_ptr<dial_tone> dial_tone_sptr;
-dial_tone_sptr make_dial_tone();
-
-class dial_tone : public gr_top_block
-{
-private:
-    dial_tone();
-    friend dial_tone_sptr make_dial_tone();
-};
diff --git a/gnuradio-examples/c++/dial_tone/main.cc b/gnuradio-examples/c++/dial_tone/main.cc
deleted file mode 100644
index a09bd8288..000000000
--- a/gnuradio-examples/c++/dial_tone/main.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 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 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.
- */
-
-// GNU Radio C++ application
-//
-// Instantiate a top block
-// Instantiate a runtime, passing it the top block
-// Tell the runtime to go...
-
-#include <dial_tone.h>
-
-int main()
-{
-    dial_tone_sptr top_block = make_dial_tone();
-    top_block->run();   
-    return 0;
-}