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freebsd-nq/sys/dev/sound/pci/emu10kx.h
Alexander Leidinger e4c87b14fd "Workaround for sound lag in current snd_emu10kx driver. Real problem 
is interaction between in-kernel sound buffer handling and hardware.
 With small buffer, there are times when both harwdare reads and
 kernel writes to the same buffer (it is only visible on slow machines, i
 think). I'm digging in channel.c and buffer.c to find a solution that
 allow use of large hardware buffers without sound lags - hardware can
 handle buffers up to 32Mb."

Submitted by:	Yuriy Tsibizov <Yuriy.Tsibizov@gfk.ru>
2006-08-07 22:44:01 +00:00

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/*-
* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
* Copyright (c) 2003-2006 Yuriy Tsibizov <yuriy.tsibizov@gfk.ru>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHERIN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef EMU10KX_H
#define EMU10KX_H
#define SND_EMU10KX_MINVER 1
#define SND_EMU10KX_PREFVER 1
#define SND_EMU10KX_MAXVER 1
#ifdef _KERNEL
#define EMUPAGESIZE 4096
#define NUM_G 64
/* XXX */
/*
* There are some problems when EMU_PLAY_BUFSZ is larger then EMU_PAGESIZE
* 1) there is a sound lag, because first round of playback is silence
* 2) the end of large file (equal to the lag duration) is lost
* 3) as a result of 1) and 2) no sound at all, when file size is less than
* EMU_PLAY_BUFSZ (it plays silence and then stops)
*/
#define EMU_PLAY_BUFSZ EMUPAGESIZE
#define EMU_REC_BUFSZ EMUPAGESIZE*16
#define EMU_MAX_BUFSZ EMUPAGESIZE*16
#define EMU_MAXPAGES 8192
#define EMU_VAR_FUNC 0
#define EMU_VAR_ROUTE 1
#define EMU_VAR_ISEMU10K1 2
#define RT_FRONT 0
#define RT_REAR 1
#define RT_CENTER 2
#define RT_SUB 3
#define RT_SIDE 4
/* mixer controls */
/* fx play */
#define M_FX0_FRONT_L 0
#define M_FX1_FRONT_R 1
#define M_FX2_REAR_L 2
#define M_FX3_REAR_R 3
#define M_FX4_CENTER 4
#define M_FX5_SUBWOOFER 5
#define M_FX6_SIDE_L 6
#define M_FX7_SIDE_R 7
/* fx rec */
#define M_FX0_REC_L 8
#define M_FX1_REC_R 9
/* inputs play */
#define M_IN0_FRONT_L 10
#define M_IN0_FRONT_R 11
#define M_IN1_FRONT_L 12
#define M_IN1_FRONT_R 13
#define M_IN2_FRONT_L 14
#define M_IN2_FRONT_R 15
#define M_IN3_FRONT_L 16
#define M_IN3_FRONT_R 17
#define M_IN4_FRONT_L 18
#define M_IN4_FRONT_R 19
#define M_IN5_FRONT_L 20
#define M_IN5_FRONT_R 21
#define M_IN6_FRONT_L 22
#define M_IN6_FRONT_R 23
#define M_IN7_FRONT_L 24
#define M_IN7_FRONT_R 25
/* inputs rec */
#define M_IN0_REC_L 26
#define M_IN0_REC_R 27
#define M_IN1_REC_L 28
#define M_IN1_REC_R 29
#define M_IN2_REC_L 30
#define M_IN2_REC_R 31
#define M_IN3_REC_L 32
#define M_IN3_REC_R 33
#define M_IN4_REC_L 34
#define M_IN4_REC_R 35
#define M_IN5_REC_L 36
#define M_IN5_REC_R 37
#define M_IN6_REC_L 38
#define M_IN6_REC_R 39
#define M_IN7_REC_L 40
#define M_IN7_REC_R 41
/* master volume */
#define M_MASTER_FRONT_L 42
#define M_MASTER_FRONT_R 43
#define M_MASTER_REAR_L 44
#define M_MASTER_REAR_R 45
#define M_MASTER_CENTER 46
#define M_MASTER_SUBWOOFER 47
#define M_MASTER_SIDE_L 48
#define M_MASTER_SIDE_R 49
/* master rec volume */
#define M_MASTER_REC_L 50
#define M_MASTER_REC_R 51
#define NUM_MIXERS 52
struct emu_sc_info;
/* MIDI device parameters */
struct emu_midiinfo {
struct emu_sc_info *card;
int port;
int portnr;
};
/* PCM device parameters */
struct emu_pcminfo {
struct emu_sc_info *card;
int route;
};
int emu_intr_register(struct emu_sc_info *sc, uint32_t inte_mask, uint32_t intr_mask, uint32_t(*func) (void *softc, uint32_t irq), void *isc);
int emu_intr_unregister(struct emu_sc_info *sc, int ihandle);
uint32_t emu_rd(struct emu_sc_info *sc, unsigned int regno, unsigned int size);
void emu_wr(struct emu_sc_info *sc, unsigned int regno, uint32_t data, unsigned int size);
uint32_t emu_rdptr(struct emu_sc_info *sc, unsigned int chn, unsigned int reg);
void emu_wrptr(struct emu_sc_info *sc, unsigned int chn, unsigned int reg, uint32_t data);
uint32_t emu_rd_p16vptr(struct emu_sc_info *sc, uint16_t chn, uint16_t reg);
void emu_wr_p16vptr(struct emu_sc_info *sc, uint16_t chn, uint16_t reg, uint32_t data);
int emu_timer_create(struct emu_sc_info *sc);
int emu_timer_set(struct emu_sc_info *sc, int timer, int delay);
int emu_timer_enable(struct emu_sc_info *sc, int timer, int go);
int emu_timer_clear(struct emu_sc_info *sc, int timer);
struct emu_voice;
struct emu_route {
int routing_left[8];
int amounts_left[8];
int routing_right[8];
int amounts_right[8];
};
struct emu_voice* emu_valloc(struct emu_sc_info *sc);
void emu_vfree(struct emu_sc_info *sc, struct emu_voice *v);
int emu_vinit(struct emu_sc_info *sc, struct emu_voice *m, struct emu_voice *s,
uint32_t sz, struct snd_dbuf *b);
void emu_vroute(struct emu_sc_info *sc, struct emu_route *rt, struct emu_voice *v);
void emu_vsetup(struct emu_voice *v, int fmt, int spd);
void emu_vwrite(struct emu_sc_info *sc, struct emu_voice *v);
void emu_vtrigger(struct emu_sc_info *sc, struct emu_voice *v, int go);
int emu_vpos(struct emu_sc_info *sc, struct emu_voice *v);
bus_dma_tag_t emu_gettag(struct emu_sc_info *sc);
void emumix_set_volume(struct emu_sc_info *sc, int mixer_idx, int volume);
int emumix_get_volume(struct emu_sc_info *sc, int mixer_idx);
void emu_enable_ir(struct emu_sc_info *sc);
#endif /* _KERNEL */
#endif /* EMU10K1_H */
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