From 95d7a87ce1122ecff3e1b8d607980e07a4e9111d Mon Sep 17 00:00:00 2001
From: Kamal Mostafa <kamal@whence.com>
Date: Wed, 8 Aug 2012 14:26:39 -0700
Subject: [PATCH] minimodem: configure --with-alsa for ALSA instead of
 Pulseaudio

---
 config.h.in     |  3 +++
 configure       | 26 ++++++++++++++++++++++++++
 configure.ac    | 14 ++++++++++++++
 src/Makefile.am |  1 +
 src/Makefile.in |  5 ++++-
 src/minimodem.c | 29 ++++++++++++++++++++---------
 6 files changed, 68 insertions(+), 10 deletions(-)

diff --git a/config.h.in b/config.h.in
index a062b23..03b5201 100644
--- a/config.h.in
+++ b/config.h.in
@@ -21,6 +21,9 @@
 /* Define to the version of this package. */
 #undef PACKAGE_VERSION
 
+/* Define to 1 to enable ALSA support */
+#undef USE_ALSA
+
 /* Define to 1 to enable pulseaudio support */
 #undef USE_PULSEAUDIO
 
diff --git a/configure b/configure
index d779dd2..46758f7 100755
--- a/configure
+++ b/configure
@@ -656,6 +656,7 @@ ac_subst_files=''
 ac_user_opts='
 enable_option_checking
 enable_dependency_tracking
+with_alsa
 with_pulseaudio
 with_sndfile
 '
@@ -1294,6 +1295,7 @@ Optional Features:
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --without-alsa          build without ALSA support
   --without-pulseaudio    build without pulseaudio support
   --without-sndfile       build without sndfile support
 
@@ -3290,6 +3292,28 @@ fi
 #   fftw3f
 deps_packages+=" fftw3f"
 
+#   ALSA
+
+# Check whether --with-alsa was given.
+if test "${with_alsa+set}" = set; then :
+  withval=$with_alsa;
+fi
+
+if test "x$with_alsa" != "xyes"; then :
+  # then
+	use_alsa=0
+else
+  # else
+	use_alsa=1
+	with_pulseaudio=no	# For now, ALSA precludes pulseaudio
+	deps_packages+=" alsa"
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define USE_ALSA $use_alsa
+_ACEOF
+
+
 #   pulseaudio
 
 # Check whether --with-pulseaudio was given.
@@ -5026,11 +5050,13 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: minimodem 0.8.2 configuration summary:
 	--with-pulseaudio     $with_pulseaudio ($use_pulseaudio)
+	--with-alsa           $with_alsa ($use_alsa)
 	--with-sndfile        $with_sndfile ($use_sndfile)
 	deps_packages:        $deps_packages
 " >&5
 $as_echo "minimodem 0.8.2 configuration summary:
 	--with-pulseaudio     $with_pulseaudio ($use_pulseaudio)
+	--with-alsa           $with_alsa ($use_alsa)
 	--with-sndfile        $with_sndfile ($use_sndfile)
 	deps_packages:        $deps_packages
 " >&6; }
diff --git a/configure.ac b/configure.ac
index 30a2052..b64f4e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,19 @@ AC_PROG_CC
 #   fftw3f
 deps_packages+=" fftw3f"
 
+#   ALSA
+AC_ARG_WITH([alsa],
+    AS_HELP_STRING([--without-alsa], [build without ALSA support]))
+AS_IF([test "x$with_alsa" != "xyes"],
+        # then
+	use_alsa=0,
+	# else
+	use_alsa=1
+	with_pulseaudio=no	# For now, ALSA precludes pulseaudio
+	deps_packages+=" alsa")
+AC_DEFINE_UNQUOTED(USE_ALSA, $use_alsa,
+	[Define to 1 to enable ALSA support])
+
 #   pulseaudio
 AC_ARG_WITH([pulseaudio],
     AS_HELP_STRING([--without-pulseaudio], [build without pulseaudio support]))
@@ -83,6 +96,7 @@ AC_OUTPUT
 
 AC_MSG_RESULT([PKG_NAME PKG_VERSION configuration summary:
 	--with-pulseaudio     $with_pulseaudio ($use_pulseaudio)
+	--with-alsa           $with_alsa ($use_alsa)
 	--with-sndfile        $with_sndfile ($use_sndfile)
 	deps_packages:        $deps_packages
 ])
diff --git a/src/Makefile.am b/src/Makefile.am
index 71d704d..86a1d81 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -36,6 +36,7 @@ SIMPLEAUDIO_SRC = \
 	simpleaudio.c		\
 	simple-tone-generator.c \
 	simpleaudio-pulse.c	\
+	simpleaudio-alsa.c	\
 	simpleaudio-sndfile.c
 
 FSK_SRC = fsk.h fsk.c
diff --git a/src/Makefile.in b/src/Makefile.in
index 143567a..80a1bef 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -68,7 +68,8 @@ PROGRAMS = $(bin_PROGRAMS)
 am__objects_1 = baudot.$(OBJEXT)
 am__objects_2 = fsk.$(OBJEXT)
 am__objects_3 = simpleaudio.$(OBJEXT) simple-tone-generator.$(OBJEXT) \
-	simpleaudio-pulse.$(OBJEXT) simpleaudio-sndfile.$(OBJEXT)
+	simpleaudio-pulse.$(OBJEXT) simpleaudio-alsa.$(OBJEXT) \
+	simpleaudio-sndfile.$(OBJEXT)
 am_minimodem_OBJECTS = minimodem.$(OBJEXT) $(am__objects_1) \
 	$(am__objects_2) $(am__objects_3)
 minimodem_OBJECTS = $(am_minimodem_OBJECTS)
@@ -218,6 +219,7 @@ SIMPLEAUDIO_SRC = \
 	simpleaudio.c		\
 	simple-tone-generator.c \
 	simpleaudio-pulse.c	\
+	simpleaudio-alsa.c	\
 	simpleaudio-sndfile.c
 
 FSK_SRC = fsk.h fsk.c
@@ -311,6 +313,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/fsk.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/minimodem.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simple-tone-generator.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simpleaudio-alsa.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simpleaudio-pulse.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simpleaudio-sndfile.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simpleaudio.Po@am__quote@
diff --git a/src/minimodem.c b/src/minimodem.c
index 9a7964b..8bfa442 100644
--- a/src/minimodem.c
+++ b/src/minimodem.c
@@ -372,17 +372,27 @@ main( int argc, char*argv[] )
     if ( TX_mode == -1 )
 	TX_mode = 0;
 
-#if !(USE_PULSEAUDIO || USE_SNDFILE)
-#error At least one of {USE_PULSEAUDIO,USE_SNDFILE} must be enabled
+#if !(USE_PULSEAUDIO || USE_ALSA || USE_SNDFILE)
+#error At least one of {USE_PULSEAUDIO,USE_ALSA,USE_SNDFILE} must be enabled!
 #endif
+
+#if (USE_PULSEAUDIO && USE_ALSA)
+#error For now, only one of {USE_PULSEAUDIO,USE_ALSA} can be enabled (FIXME)!
+#endif
+#if USE_PULSEAUDIO
+#define simpleaudio_open_system_audio simpleaudio_open_stream_pulseaudio
+#elif USE_ALSA
+#define simpleaudio_open_system_audio simpleaudio_open_stream_alsa
+#endif
+
     if ( filename ) {
 #if !USE_SNDFILE
 	fprintf(stderr, "E: This build of minimodem was configured without sndfile,\nE:   so the --file flag is not supported.\n");
 	exit(1);
 #endif
     } else {
-#if !USE_PULSEAUDIO
-	fprintf(stderr, "E: this build of minimodem was configured without pulseaudio,\nE:   so only the --file mode is supported.\n");
+#ifndef simpleaudio_open_system_audio
+	fprintf(stderr, "E: this build of minimodem was configured without system audio support,\nE:   so only the --file mode is supported.\n");
 	exit(1);
 #endif
     }
@@ -496,9 +506,10 @@ main( int argc, char*argv[] )
 	    if ( ! sa_out )
 		return 1;
 	}
-#if USE_PULSEAUDIO
+
+#ifdef simpleaudio_open_system_audio
 	if ( ! sa_out )
-	    sa_out = simpleaudio_open_stream_pulseaudio(SA_STREAM_PLAYBACK,
+	    sa_out = simpleaudio_open_system_audio(SA_STREAM_PLAYBACK,
 					program_name, "output audio");
 #endif
 	if ( ! sa_out )
@@ -526,10 +537,10 @@ main( int argc, char*argv[] )
 	if ( ! sa )
 	    return 1;
     }
-#if USE_PULSEAUDIO
+#ifdef simpleaudio_open_system_audio
     if ( ! sa )
-	sa = simpleaudio_open_stream_pulseaudio(SA_STREAM_RECORD,
-				    program_name, "input audio");
+	sa = simpleaudio_open_system_audio(SA_STREAM_RECORD,
+				program_name, "input audio");
 #endif
     if ( !sa )
         return 1;