shout: added mp3 encoder

[mk: moved this patch after "Refactor and cleanup of shout Ogg and MP3
audio outputs".  The original commit message follows, although it is
outdated:]

Creation of shout_mp3 audio output plugin. Basically I just copied the
existing shout plugin and replaced ogg with lame. Uses lame for mp3
encoding. Next step is to pull common functionality out of each shout
plugin and share it between them.

Configuration options for "shout_mp3" are the same as for "shout".

1 files changed, 108 insertions, 0 deletions

diff --git a/m4/lame.m4 b/m4/lame.m4
new file mode 100644
index 00000000..5ebf550d
--- /dev/null
+++ b/m4/lame.m4
@@ -0,0 +1,108 @@
+dnl borrowed from oddsock.org
+dnl AM_PATH_LAME([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl Test for liblame, and define LAME_CFLAGS and LAME_LIBS
+dnl
+AC_DEFUN([AM_PATH_LAME],
+[dnl
+dnl Get the cflags and libraries
+dnl
+AC_ARG_WITH(lame,[  --with-lame=PFX   Prefix where liblame is installed (optional)], lame_prefix="$withval", lame_prefix="")
+AC_ARG_WITH(lame-libraries,[  --with-lame-libraries=DIR   Directory where liblame library is installed (optional)], lame_libraries="$withval", lame_libraries="")
+AC_ARG_WITH(lame-includes,[  --with-lame-includes=DIR   Directory where liblame header files are installed (optional)], lame_includes="$withval", lame_includes="")
+AC_ARG_ENABLE(lametest, [  --disable-lametest       Do not try to compile and run a test liblame program],, enable_lametest=yes)
+
+if test "x$lame_prefix" != "xno" ; then
+
+  if test "x$lame_libraries" != "x" ; then
+    LAME_LIBS="-L$lame_libraries"
+  elif test "x$lame_prefix" != "x" ; then
+    LAME_LIBS="-L$lame_prefix/lib"
+  elif test "x$prefix" != "xNONE" ; then
+    LAME_LIBS="-L$prefix/lib"
+  fi
+
+  LAME_LIBS="$LAME_LIBS -lmp3lame -lm"
+
+  if test "x$lame_includes" != "x" ; then
+    LAME_CFLAGS="-I$lame_includes"
+  elif test "x$lame_prefix" != "x" ; then
+    LAME_CFLAGS="-I$lame_prefix/include"
+  elif test "x$prefix" != "xNONE"; then
+    LAME_CFLAGS="-I$prefix/include"
+  fi
+
+  AC_MSG_CHECKING(for liblame)
+  no_lame=""
+
+
+  if test "x$enable_lametest" = "xyes" ; then
+    ac_save_CFLAGS="$CFLAGS"
+    ac_save_LIBS="$LIBS"
+    CFLAGS="$CFLAGS $LAME_CFLAGS"
+    LIBS="$LIBS $LAME_LIBS"
+dnl
+dnl Now check if the installed liblame is sufficiently new.
+dnl
+      rm -f conf.lametest
+      AC_TRY_RUN([
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <lame/lame.h>
+
+int main ()
+{
+  system("touch conf.lametest");
+  return 0;
+}
+
+],, no_lame=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+  fi
+
+  if test "x$no_lame" = "x" ; then
+     AC_MSG_RESULT(yes)
+     ifelse([$1], , :, [$1])
+  else
+     AC_MSG_RESULT(no)
+     if test -f conf.lametest ; then
+       :
+     else
+       echo "*** Could not run liblame test program, checking why..."
+       CFLAGS="$CFLAGS $LAME_CFLAGS"
+       LIBS="$LIBS $LAME_LIBS"
+       AC_TRY_LINK([
+#include <stdio.h>
+#include <lame/lame.h>
+],     [ return 0; ],
+       [ echo "*** The test program compiled, but did not run. This usually means"
+       echo "*** that the run-time linker is not finding liblame or finding the wrong"
+       echo "*** version of liblame. If it is not finding liblame, you'll need to set your"
+       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+       echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+       echo "*** is required on your system"
+       echo "***"
+       echo "*** If you have an old version installed, it is best to remove it, although"
+       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
+       [ echo "*** The test program failed to compile or link. See the file config.log for the"
+       echo "*** exact error that occured. This usually means liblame was incorrectly installed"
+       echo "*** or that you have moved liblame since it was installed." ])
+       CFLAGS="$ac_save_CFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+     LAME_CFLAGS=""
+     LAME_LIBS=""
+     ifelse([$2], , :, [$2])
+  fi
+  AC_DEFINE(HAVE_LAME, 1, [Define if you have liblame.])
+  use_lame="1"
+else
+  LAME_CFLAGS=""
+  LAME_LIBS=""
+fi
+  AC_SUBST(LAME_CFLAGS)
+  AC_SUBST(LAME_LIBS)
+  rm -f conf.lametest
+])
+