/*      $NetBSD: sun.c,v 1.11 2024/02/27 21:05:34 gson Exp $    */

/*
* Copyright (c) 2002, 2013, 2015 Matthew R. Green
* 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 ``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 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, WHETHER IN 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.
*/

/*
* XXX this is slightly icky in places...
*/
#include <sys/cdefs.h>

#ifndef lint
__RCSID("$NetBSD: sun.c,v 1.11 2024/02/27 21:05:34 gson Exp $");
#endif


#include <sys/types.h>
#include <sys/audioio.h>
#include <sys/ioctl.h>
#include <sys/time.h>

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "libaudio.h"
#include "auconv.h"

/*
* SunOS/NeXT .au format helpers
*/
static const struct {
       int     file_encoding;
       int     encoding;
       int     precision;
} file2sw_encodings[] = {
       { AUDIO_FILE_ENCODING_MULAW_8,          AUDIO_ENCODING_ULAW,    8 },
       { AUDIO_FILE_ENCODING_LINEAR_8,         AUDIO_ENCODING_SLINEAR_BE, 8 },
       { AUDIO_FILE_ENCODING_LINEAR_16,        AUDIO_ENCODING_SLINEAR_BE, 16 },
       { AUDIO_FILE_ENCODING_LINEAR_24,        AUDIO_ENCODING_SLINEAR_BE, 24 },
       { AUDIO_FILE_ENCODING_LINEAR_32,        AUDIO_ENCODING_SLINEAR_BE, 32 },
#if 0
       /*
        * we should make some of these available.  the, eg ultrasparc, port
        * can use the VIS instructions (if available) do do some of these
        * mpeg ones.
        */
       { AUDIO_FILE_ENCODING_FLOAT,            AUDIO_ENCODING_ULAW,    32 },
       { AUDIO_FILE_ENCODING_DOUBLE,           AUDIO_ENCODING_ULAW,    64 },
       { AUDIO_FILE_ENCODING_ADPCM_G721,       AUDIO_ENCODING_ULAW,    4 },
       { AUDIO_FILE_ENCODING_ADPCM_G722,       AUDIO_ENCODING_ULAW,    0 },
       { AUDIO_FILE_ENCODING_ADPCM_G723_3,     AUDIO_ENCODING_ULAW,    3 },
       { AUDIO_FILE_ENCODING_ADPCM_G723_5,     AUDIO_ENCODING_ULAW,    5 },
#endif
       { AUDIO_FILE_ENCODING_ALAW_8,           AUDIO_ENCODING_ALAW,    8 },
       { -1, -1, -1 }
};

int
audio_sun_to_encoding(int sun_encoding, u_int *encp, u_int *precp)
{
       int i;

       for (i = 0; file2sw_encodings[i].file_encoding != -1; i++)
               if (file2sw_encodings[i].file_encoding == sun_encoding) {
                       *precp = file2sw_encodings[i].precision;
                       *encp = file2sw_encodings[i].encoding;
                       return (0);
               }
       return (1);
}

int
audio_encoding_to_sun(int encoding, int precision, int *sunep)
{
       int i;

       for (i = 0; file2sw_encodings[i].file_encoding != -1; i++)
               if (file2sw_encodings[i].encoding == encoding &&
                   file2sw_encodings[i].precision == precision) {
                       *sunep = file2sw_encodings[i].file_encoding;
                       return (0);
               }
       return (1);
}

int
sun_prepare_header(struct track_info *ti, void **hdrp, size_t *lenp, int *leftp)
{
       static int warned = 0;
       static sun_audioheader auh;
       int sunenc, oencoding = ti->encoding;

       /* only perform conversions if we don't specify the encoding */
       switch (ti->encoding) {

       case AUDIO_ENCODING_ULINEAR_LE:
#if BYTE_ORDER == LITTLE_ENDIAN
       case AUDIO_ENCODING_ULINEAR:
#endif
               if (ti->precision == 16 || ti->precision == 32)
                       ti->encoding = AUDIO_ENCODING_SLINEAR_BE;
               break;

       case AUDIO_ENCODING_ULINEAR_BE:
#if BYTE_ORDER == BIG_ENDIAN
       case AUDIO_ENCODING_ULINEAR:
#endif
               if (ti->precision == 16 || ti->precision == 32)
                       ti->encoding = AUDIO_ENCODING_SLINEAR_BE;
               break;

       case AUDIO_ENCODING_SLINEAR_LE:
#if BYTE_ORDER == LITTLE_ENDIAN
       case AUDIO_ENCODING_SLINEAR:
#endif
               if (ti->precision == 16 || ti->precision == 32)
                       ti->encoding = AUDIO_ENCODING_SLINEAR_BE;
               break;

#if BYTE_ORDER == BIG_ENDIAN
       case AUDIO_ENCODING_SLINEAR:
               ti->encoding = AUDIO_ENCODING_SLINEAR_BE;
               break;
#endif
       }

       /* if we can't express this as a Sun header, don't write any */
       if (audio_encoding_to_sun(ti->encoding, ti->precision, &sunenc) != 0) {
               if (!ti->qflag && !warned) {
                       const char *s = audio_enc_from_val(oencoding);

                       if (s == NULL)
                               s = "(unknown)";
                       warnx("failed to convert to sun encoding from %s "
                             "(precision %d);\nSun audio header not written",
                             s, ti->precision);
               }
               ti->format = AUDIO_FORMAT_NONE;
               warned = 1;
               return -1;
       }

       auh.magic = htonl(AUDIO_FILE_MAGIC);
       if (ti->outfd == STDOUT_FILENO)
               auh.data_size = htonl(AUDIO_UNKNOWN_SIZE);
       else if (ti->total_size != -1)
               auh.data_size = htonl(ti->total_size);
       else
               auh.data_size = 0;
       auh.encoding = htonl(sunenc);
       auh.sample_rate = htonl(ti->sample_rate);
       auh.channels = htonl(ti->channels);
       if (ti->header_info) {
               int     len, infolen;

               infolen = ((len = strlen(ti->header_info)) + 7) & 0xfffffff8;
               *leftp = infolen - len;
               auh.hdr_size = htonl(sizeof(auh) + infolen);
       } else {
               *leftp = sizeof(audio_default_info);
               auh.hdr_size = htonl(sizeof(auh) + *leftp);
       }
       *(sun_audioheader **)hdrp = &auh;
       *lenp = sizeof auh;
       return 0;
}

write_conv_func
sun_write_get_conv_func(struct track_info *ti)
{
       write_conv_func conv_func = NULL;

       /* only perform conversions if we don't specify the encoding */
       switch (ti->encoding) {

       case AUDIO_ENCODING_ULINEAR_LE:
#if BYTE_ORDER == LITTLE_ENDIAN
       case AUDIO_ENCODING_ULINEAR:
#endif
               if (ti->precision == 16)
                       conv_func = change_sign16_swap_bytes_le;
               else if (ti->precision == 32)
                       conv_func = change_sign32_swap_bytes_le;
               break;

       case AUDIO_ENCODING_ULINEAR_BE:
#if BYTE_ORDER == BIG_ENDIAN
       case AUDIO_ENCODING_ULINEAR:
#endif
               if (ti->precision == 16)
                       conv_func = change_sign16_be;
               else if (ti->precision == 32)
                       conv_func = change_sign32_be;
               break;

       case AUDIO_ENCODING_SLINEAR_LE:
#if BYTE_ORDER == LITTLE_ENDIAN
       case AUDIO_ENCODING_SLINEAR:
#endif
               if (ti->precision == 16)
                       conv_func = swap_bytes;
               else if (ti->precision == 32)
                       conv_func = swap_bytes32;
               break;
       }

       return conv_func;
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.