X-Git-Url: https://git.distorted.org.uk/~mdw/disorder/blobdiff_plain/810b8083772d8f82e589ed70fa5e7d6d5292ccd8..d22b8a59995829bc14b4490b9bddd95346e0585d:/lib/configuration.h

diff --git a/lib/configuration.h b/lib/configuration.h
index 78c31ef..4b22fdb 100644
--- a/lib/configuration.h
+++ b/lib/configuration.h
@@ -183,12 +183,24 @@ struct config {
    * BACKEND_NETWORK.
    */
   int api;
+
+/* These values had better be non-negative */
 #define BACKEND_ALSA 0			/**< Use ALSA (Linux only) */
 #define BACKEND_COMMAND 1		/**< Execute a command */
 #define BACKEND_NETWORK 2		/**< Transmit RTP  */
 #define BACKEND_COREAUDIO 3		/**< Use Core Audio (Mac only) */
 #define BACKEND_OSS 4		        /**< Use OSS */
 
+#if HAVE_ALSA_ASOUNDLIB_H
+# define DEFAULT_BACKEND BACKEND_ALSA
+#elif HAVE_SYS_SOUNDCARD_H || EMPEG_HOST
+# define DEFAULT_BACKEND BACKEND_OSS
+#elif HAVE_COREAUDIO_AUDIOHARDWARE_H
+# define DEFAULT_BACKEND BACKEND_COREAUDIO
+#else
+# error Cannot choose a default backend
+#endif
+
   /** @brief Home directory for state files */
   const char *home;