diff options
Diffstat (limited to 'sound/oss/emu10k1/cardwo.h')
| -rw-r--r-- | sound/oss/emu10k1/cardwo.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/cardwo.h b/sound/oss/emu10k1/cardwo.h new file mode 100644 index 000000000000..1dece8853e5c --- /dev/null +++ b/sound/oss/emu10k1/cardwo.h @@ -0,0 +1,90 @@ +/* + ********************************************************************** + * 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 */ |