- /** @brief API used to play sound
- *
- * Choices are @ref BACKEND_ALSA, @ref BACKEND_COMMAND or @ref
- * 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