23b5d91433
audio framework
Summary of changes:
* struct audio_params
- remove sw_code, factor, factor_denom, hw_sample_rate,
hw_encoding ,hw_precision, and hw_channels. Conversion information
is conveyed by stream_filter_list_t.
- change the type of sample_rate: u_long -> u_int
- add `validbits,' which represents the valid data size in
precision bits. It is required in order to distinguish 24/32bit
from 24/24bit or 32/32bit.
* audio_hw_if
- add two parameters to set_params()
stream_filter_list_t *pfil, stream_filter_list *rfil
A HW driver should set filter recipes for requested formats
- constify audio_params parameters of trigger_output() and
trigger_input(). They represent audio formats for the hardware.
- make open() and close() optional
- add int (AUMODE_PLAY or AUMODE_RECORD) and audio_params_t parameters
to round_blocksize()
* sw_code is replaced with stream_filter_t.
stream_filer_t converts audio data in an input buffer and writes
into another output buffer unlike sw_code, which converts data in
single buffer.
converters in dev/auconv.c, dev/mulaw.c, dev/aurateconv.c,
dev/tc/bba.c, dev/ic/msm6258.c, and arch/arm/iomd/vidcaudio.c are
reimplemented as stream_filter_t
* MI audio
- audiosetinfo() builds filter pipelines from stream_filter_list_t
filled by audio_hw_if::set_params()
- audiosetinfo() returns with EINVAL if mmapped and set_params()
requests filters
- audio_write(), audio_pint(), and audio_rint() invoke a filter
pipeline.
- ioctl() for FIONREAD, AUDIO_WSEEK, AUDIO_GETIOFFS,
AUDIO_GETOOFFS, and audio_prinfo::{seek,samples} for
AUDIO_GETINFO handle values for a buffer nearest to userland.
* add `struct device *' parameter to ac97_attach()
* all of audio HW drivers follow audio_hw_if and ac97 changes
96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
/* $NetBSD: ac97var.h,v 1.14 2005/01/10 22:01:37 kent Exp $ */
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/* $OpenBSD: ac97.h,v 1.4 2000/07/19 09:01:35 csapuntz Exp $ */
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/*
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* Copyright (c) 1999 Constantine Sapuntzakis
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*
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* Author: Constantine Sapuntzakis <csapuntz@stanford.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY CONSTANTINE SAPUNTZAKIS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_IC_AC97VAR_H_
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#define _DEV_IC_AC97VAR_H_
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#include <sys/types.h>
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struct ac97_codec_if;
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/*
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* This is the interface used to attach the AC97 compliant CODEC.
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*/
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enum ac97_host_flags {
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AC97_HOST_DONT_READ = 0x1,
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AC97_HOST_SWAPPED_CHANNELS = 0x2 /* l/r is reversed */
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};
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struct ac97_host_if {
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void *arg;
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int (*attach)(void *, struct ac97_codec_if *);
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int (*read)(void *, uint8_t, uint16_t *);
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int (*write)(void *, uint8_t, uint16_t);
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int (*reset)(void *);
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enum ac97_host_flags (*flags)(void *);
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};
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/*
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* This is the interface exported by the AC97 compliant CODEC
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*/
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struct ac97_codec_if_vtbl {
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int (*mixer_get_port)(struct ac97_codec_if *, mixer_ctrl_t *);
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int (*mixer_set_port)(struct ac97_codec_if *, mixer_ctrl_t *);
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int (*query_devinfo)(struct ac97_codec_if *, mixer_devinfo_t *);
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int (*get_portnum_by_name)(struct ac97_codec_if *, const char *,
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const char *, const char *);
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/*
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* The AC97 codec driver records the various port settings. This
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* function can be used to restore the port settings, e.g. after
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* resume from a laptop suspend to disk.
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*/
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void (*restore_ports)(struct ac97_codec_if *);
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u_int16_t (*get_extcaps)(struct ac97_codec_if *);
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int (*set_rate)(struct ac97_codec_if *, int, u_int *);
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void (*set_clock)(struct ac97_codec_if *, unsigned int);
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void (*detach)(struct ac97_codec_if *);
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};
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struct ac97_codec_if {
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struct ac97_codec_if_vtbl *vtbl;
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};
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struct device;
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int ac97_attach(struct ac97_host_if *, struct device *);
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#define AC97_IS_FIXED_RATE(codec) \
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!((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_VRA)
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#define AC97_IS_4CH(codec) \
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((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_SDAC)
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#define AC97_IS_6CH(codec) \
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(((codec)->vtbl->get_extcaps(codec) \
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& (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC)) \
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== (AC97_EXT_AUDIO_SDAC | AC97_EXT_AUDIO_CDAC | AC97_EXT_AUDIO_LDAC))
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#define AC97_HAS_SPDIF(codec) \
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((codec)->vtbl->get_extcaps(codec) & AC97_EXT_AUDIO_SPDIF)
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#endif /* _DEV_IC_AC97VAR_H_ */
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