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+/*
+ **********************************************************************
+ * cardwo.h -- header file for card wave out functions
+ * Copyright 1999, 2000 Creative Labs, Inc.
+ *
+ **********************************************************************
+ *
+ * Date Author Summary of changes
+ * ---- ------ ------------------
+ * October 20, 1999 Bertrand Lee base code release
+ *
+ **********************************************************************
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
+ * USA.
+ *
+ **********************************************************************
+ */
+
+#ifndef _CARDWO_H
+#define _CARDWO_H
+
+#include "icardwav.h"
+#include "audio.h"
+#include "voicemgr.h"
+#include "timer.h"
+
+/* setting this to other than a power of two may break some applications */
+#define WAVEOUT_MAXBUFSIZE MAXBUFSIZE
+
+#define WAVEOUT_DEFAULTFRAGLEN 20 /* Time to play a fragment in ms (latency) */
+#define WAVEOUT_DEFAULTBUFLEN 500 /* Time to play the entire buffer in ms */
+
+#define WAVEOUT_MINFRAGSHIFT 6 /* Minimum fragment size in bytes is 2^6 */
+#define WAVEOUT_MINFRAGS 3 /* _don't_ go bellow 3, it would break silence filling */
+#define WAVEOUT_MAXVOICES 6
+
+struct waveout_buffer {
+ u16 ossfragshift;
+ u32 numfrags;
+ u32 fragment_size; /* in bytes units */
+ u32 size; /* in bytes units */
+ u32 pages; /* buffer size in page units*/
+ u32 silence_pos; /* software cursor position (including silence bytes) */
+ u32 hw_pos; /* hardware cursor position */
+ u32 free_bytes; /* free bytes available on the buffer (not including silence bytes) */
+ u8 fill_silence;
+ u32 silence_bytes; /* silence bytes on the buffer */
+};
+
+struct woinst
+{
+ u8 state;
+ u8 num_voices;
+ struct emu_voice voice[WAVEOUT_MAXVOICES];
+ struct emu_timer timer;
+ struct wave_format format;
+ struct waveout_buffer buffer;
+ wait_queue_head_t wait_queue;
+ u8 mmapped;
+ u32 total_copied; /* total number of bytes written() to the buffer (excluding silence) */
+ u32 total_played; /* total number of bytes played including silence */
+ u32 blocks;
+ u8 device;
+ spinlock_t lock;
+};
+
+int emu10k1_waveout_open(struct emu10k1_wavedevice *);
+void emu10k1_waveout_close(struct emu10k1_wavedevice *);
+void emu10k1_waveout_start(struct emu10k1_wavedevice *);
+void emu10k1_waveout_stop(struct emu10k1_wavedevice *);
+void emu10k1_waveout_getxfersize(struct woinst*, u32 *);
+void emu10k1_waveout_xferdata(struct woinst*, u8 __user *, u32 *);
+void emu10k1_waveout_fillsilence(struct woinst*);
+int emu10k1_waveout_setformat(struct emu10k1_wavedevice*, struct wave_format*);
+void emu10k1_waveout_update(struct woinst*);
+
+#endif /* _CARDWO_H */