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-rw-r--r--trunk/src/emu/sound/speaker.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/trunk/src/emu/sound/speaker.h b/trunk/src/emu/sound/speaker.h
new file mode 100644
index 00000000000..d1da4660665
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+++ b/trunk/src/emu/sound/speaker.h
@@ -0,0 +1,29 @@
+/**********************************************************************
+
+ speaker.h
+ Sound driver to emulate a simple speaker,
+ driven by one or more output bits
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __SOUND_SPEAKER_H__
+#define __SOUND_SPEAKER_H__
+
+#include "devlegcy.h"
+
+#define SPEAKER_TAG "speaker"
+
+typedef struct _speaker_interface speaker_interface;
+struct _speaker_interface
+{
+ int num_level; /* optional: number of levels (if not two) */
+ const INT16 *levels; /* optional: pointer to level lookup table */
+};
+
+void speaker_level_w (device_t *device, int new_level);
+
+DECLARE_LEGACY_SOUND_DEVICE(SPEAKER_SOUND, speaker_sound);
+
+#endif /* __SPEAKER_H__ */