e622eac459
- Interrupt-oriented system rather than thread-oriented.
- Improve stability, quality and performance.
- Split playback and record cleanly. Improve halfduplex support.
- Many bugs are fixed including deadlocks, resource leaks, abuses, etc.
- Simplify audio filter mechanism. The encoding/channels/frequency
conversions are completely handled in the upper layer. So the hard-
ware driver only converts its hardware encoding (if necessary).
- audio_hw_if changes:
- Obsoletes query_encoding and add query_format instead.
- Obsoletes set_params and add set_format instead.
- Remove drain, setfd, mappage.
- The call sequences are changed.
- ioctl AUDIO_GETFD/SETFD, AUDIO_GETCHAN/SETCHAN are obsoleted.
- ioctl AUDIO_{QUERY,GET,SET}FORMAT are introduced.
- cleanup config attributes: au*conv and mulaw.
- All hardware drivers should follow it (I've done as much as possible).
Some file paths are changed:
- dev/audio.c -> dev/audio/audio.c (rewritten)
- dev/audiovar.h -> dev/audio/audiovar.h
- dev/audio_dai.h -> dev/audio/audio_dai.h
- dev/audio_if.h -> dev/audio/audio_if.h
- dev/audiobell.c -> dev/audio/audiobell.c
- dev/audiobellvar.h -> dev/audio/audiobellvar.h
- dev/mulaw.[ch] -> dev/audio/mulaw.[ch] + dev/audio/alaw.c
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/* $NetBSD: audiofil.h,v 1.2 2019/05/08 13:40:17 isaki Exp $ */
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/*
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* Copyright (C) 2017 Tetsuya Isaki. All rights reserved.
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* Copyright (C) 2017 Y.Sugahara (moveccr). All rights reserved.
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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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_DEV_AUDIO_AUDIOFIL_H_
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#define _SYS_DEV_AUDIO_AUDIOFIL_H_
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/*
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* Number of bits for internal format.
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* XXX 32bit mode is not completed.
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* XXX Is this necessary?
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*/
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#define AUDIO_INTERNAL_BITS 16
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/*#define AUDIO_INTERNAL_BITS 32 */
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#if AUDIO_INTERNAL_BITS == 16
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typedef int16_t aint_t; /* audio integer */
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typedef uint16_t auint_t; /* audio unsigned integer */
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typedef int32_t aint2_t; /* audio wide integer */
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typedef uint32_t auint2_t; /* audio unsigned wide integer */
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#define AINT_T_MAX ((aint_t)0x7fff)
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#define AINT_T_MIN ((aint_t)0x8000)
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#elif AUDIO_INTERNAL_BITS == 32
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typedef int32_t aint_t;
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typedef uint32_t auint_t;
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typedef int64_t aint2_t;
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typedef uint64_t auint2_t;
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#define AINT_T_MAX ((aint_t)0x7fffffff)
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#define AINT_T_MIN ((aint_t)0x80000000)
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#else
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#error Invalid AUDIO_INTERNAL_BITS
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#endif
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/*
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* audio format.
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*
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* precision <= stride always holds.
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*/
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typedef struct {
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u_int sample_rate; /* sample rate in Hz */
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u_int encoding; /* AUDIO_ENCODING_* */
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u_int stride; /* container bits of a sample */
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u_int precision; /* valid bits of a sample */
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u_int channels; /* 1..AUDIO_MAX_CHANNELS */
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} audio_format2_t;
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/* Parameters for conversion filters */
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typedef struct {
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/* Pointer to source samples. */
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const void *src;
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/* Input format */
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const audio_format2_t *srcfmt;
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/* Pointer to destination buffer. */
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void *dst;
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/* Output format */
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const audio_format2_t *dstfmt;
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/*
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* Number of frames to be converted.
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* The conversion filter must output 'count' frames. src and dst
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* are guaranteed that at least 'count' frames are contiguous.
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* The caller does not reference this count after calling, so
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* that the conversion filter can use passed this variable.
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* For example, decrementing it directly.
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*/
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u_int count;
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/* The conversion filters can use this pointer. */
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void *context;
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} audio_filter_arg_t;
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typedef void(*audio_filter_t)(audio_filter_arg_t *arg);
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/* Filter registration structure */
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typedef struct {
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audio_filter_t codec; /* conversion function */
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void *context; /* optional codec's argument */
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} audio_filter_reg_t;
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#endif /* !_SYS_DEV_AUDIO_AUDIOFIL_H_ */
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