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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_MINBUFSIZE 64
#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
#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*, 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 */
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