| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | ********************************************************************** |
| 3 | * cardwo.h -- header file for card wave out functions |
| 4 | * Copyright 1999, 2000 Creative Labs, Inc. |
| 5 | * |
| 6 | ********************************************************************** |
| 7 | * |
| 8 | * Date Author Summary of changes |
| 9 | * ---- ------ ------------------ |
| 10 | * October 20, 1999 Bertrand Lee base code release |
| 11 | * |
| 12 | ********************************************************************** |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU General Public License as |
| 16 | * published by the Free Software Foundation; either version 2 of |
| 17 | * the License, or (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public |
| 25 | * License along with this program; if not, write to the Free |
| 26 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, |
| 27 | * USA. |
| 28 | * |
| 29 | ********************************************************************** |
| 30 | */ |
| 31 | |
| 32 | #ifndef _CARDWO_H |
| 33 | #define _CARDWO_H |
| 34 | |
| 35 | #include "icardwav.h" |
| 36 | #include "audio.h" |
| 37 | #include "voicemgr.h" |
| 38 | #include "timer.h" |
| 39 | |
| 40 | /* setting this to other than a power of two may break some applications */ |
| 41 | #define WAVEOUT_MAXBUFSIZE MAXBUFSIZE |
| 42 | |
| 43 | #define WAVEOUT_DEFAULTFRAGLEN 20 /* Time to play a fragment in ms (latency) */ |
| 44 | #define WAVEOUT_DEFAULTBUFLEN 500 /* Time to play the entire buffer in ms */ |
| 45 | |
| 46 | #define WAVEOUT_MINFRAGSHIFT 6 /* Minimum fragment size in bytes is 2^6 */ |
| 47 | #define WAVEOUT_MINFRAGS 3 /* _don't_ go bellow 3, it would break silence filling */ |
| 48 | #define WAVEOUT_MAXVOICES 6 |
| 49 | |
| 50 | struct waveout_buffer { |
| 51 | u16 ossfragshift; |
| 52 | u32 numfrags; |
| 53 | u32 fragment_size; /* in bytes units */ |
| 54 | u32 size; /* in bytes units */ |
| 55 | u32 pages; /* buffer size in page units*/ |
| 56 | u32 silence_pos; /* software cursor position (including silence bytes) */ |
| 57 | u32 hw_pos; /* hardware cursor position */ |
| 58 | u32 free_bytes; /* free bytes available on the buffer (not including silence bytes) */ |
| 59 | u8 fill_silence; |
| 60 | u32 silence_bytes; /* silence bytes on the buffer */ |
| 61 | }; |
| 62 | |
| 63 | struct woinst |
| 64 | { |
| 65 | u8 state; |
| 66 | u8 num_voices; |
| 67 | struct emu_voice voice[WAVEOUT_MAXVOICES]; |
| 68 | struct emu_timer timer; |
| 69 | struct wave_format format; |
| 70 | struct waveout_buffer buffer; |
| 71 | wait_queue_head_t wait_queue; |
| 72 | u8 mmapped; |
| 73 | u32 total_copied; /* total number of bytes written() to the buffer (excluding silence) */ |
| 74 | u32 total_played; /* total number of bytes played including silence */ |
| 75 | u32 blocks; |
| 76 | u8 device; |
| 77 | spinlock_t lock; |
| 78 | }; |
| 79 | |
| 80 | int emu10k1_waveout_open(struct emu10k1_wavedevice *); |
| 81 | void emu10k1_waveout_close(struct emu10k1_wavedevice *); |
| 82 | void emu10k1_waveout_start(struct emu10k1_wavedevice *); |
| 83 | void emu10k1_waveout_stop(struct emu10k1_wavedevice *); |
| 84 | void emu10k1_waveout_getxfersize(struct woinst*, u32 *); |
| 85 | void emu10k1_waveout_xferdata(struct woinst*, u8 __user *, u32 *); |
| 86 | void emu10k1_waveout_fillsilence(struct woinst*); |
| 87 | int emu10k1_waveout_setformat(struct emu10k1_wavedevice*, struct wave_format*); |
| 88 | void emu10k1_waveout_update(struct woinst*); |
| 89 | |
| 90 | #endif /* _CARDWO_H */ |