/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)audiosize.c 1.19 04/03/01 Copyright 1998-2004 J. Schilling */
/*
* Copyright (c) 1998-2004 J. Schilling
*
* First .vaw implementation made by Dave Platt <dplatt@iq.nc.com>
* Current .wav implementation with additional help from Heiko Eißfeld.
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <mconfig.h>
#include <statdefs.h>
#include <unixstd.h>
#include <standard.h>
#include <utypes.h>
#include <strdefs.h>
#include <intcvt.h>
#include <schily.h>
#include <usal/usalcmd.h>
#include "auheader.h"
typedef struct {
Uchar magic[4];
Uchar hdr_size[4];
Uchar data_size[4];
Uchar encoding[4];
Uchar sample_rate[4];
Uchar channels[4];
} sun_au_t;
#define SUN_AU_MAGIC ".snd"
#define SUN_AU_UNKNOWN_LEN ((Uint)~0)
#define SUN_AU_ULAW8 1 /* American ISDN Telephonie */
#define SUN_AU_LINEAR8 2 /* Linear PCM 8 bit/channel */
#define SUN_AU_LINEAR16 3 /* Linear PCM 16 bit/channel */
#define SUN_AU_LINEAR24 4 /* Linear PCM 24 bit/channel */
#define SUN_AU_LINEAR32 5 /* Linear PCM 32 bit/channel */
#define SUN_AU_FLOAT 6 /* 32 bit IEEE floatingpoint */
#define SUN_AU_DOUBLE 7 /* 64 bit IEEE floatingpoint */
#define SUN_AU_G721 23 /* 4 bit CCITT G.721 ADPCM */
#define SUN_AU_G722 24 /* CCITT G.722 ADPCM */
#define SUN_AU_G723_3 25 /* 3 bit CCITT G.723 ADPCM */
#define SUN_AU_G723_5 26 /* 5 bit CCITT G.723 ADPCM */
#define SUN_AU_ALAW8 27 /* International ISDN Tel. */
typedef struct {
Uchar ckid[4];
Uchar cksize[4];
} chunk_t;
typedef struct {
Uchar wave[4];
} riff_chunk;
typedef struct {
Uchar fmt_tag[2];
Uchar channels[2];
Uchar sample_rate[4];
Uchar av_byte_rate[4];
Uchar block_size[2];
Uchar bits_per_sample[2];
} fmt_chunk;
#define WAV_RIFF_MAGIC "RIFF" /* Magic for file format */
#define WAV_WAVE_MAGIC "WAVE" /* Magic for Waveform Audio */
#define WAV_FMT_MAGIC "fmt " /* Start of Waveform format */
#define WAV_DATA_MAGIC "data" /* Start of data chunk */
#define WAV_FORMAT_PCM 0x0001 /* Linear PCM format */
#define WAV_FORMAT_ULAW 0x0101 /* American ISDN Telephonie */
#define WAV_FORMAT_ALAW 0x0102 /* International ISDN Tel. */
#define WAV_FORMAT_ADPCM 0x0103 /* ADPCM format */
#define le_a_to_u_short(a) ((unsigned short) \
((((unsigned char *)a)[0] & 0xFF) | \
(((unsigned char *)a)[1] << 8 & 0xFF00)))
#ifdef __STDC__
#define le_a_to_u_long(a) ((unsigned long) \
((((unsigned char *)a)[0] & 0xFF) | \
(((unsigned char *)a)[1] << 8 & 0xFF00) | \
(((unsigned char *)a)[2] << 16 & 0xFF0000) | \
(((unsigned char *)a)[3] << 24 & 0xFF000000UL)))
#else
#define le_a_to_u_long(a) ((unsigned long) \
((((unsigned char *)a)[0] & 0xFF) | \
(((unsigned char *)a)[1] << 8 & 0xFF00) | \
(((unsigned char *)a)[2] << 16 & 0xFF0000) | \
(((unsigned char *)a)[3] << 24 & 0xFF000000)))
#endif
BOOL is_auname(const char *name);
off_t ausize(int f);
BOOL is_wavname(const char *name);
off_t wavsize(int f);
BOOL
is_auname(const char *name)
{
const char *p;
if ((p = strrchr(name, '.')) == NULL)
return (FALSE);
return (streql(p, ".au"));
}
/*
* Read Sun audio header, leave file seek pointer past auheader.
*/
off_t
ausize(int f)
{
sun_au_t hdr;
struct stat sb;
mode_t mode;
off_t size;
Int32_t val;
long ret = AU_BAD_HEADER;
/*
* First check if a bad guy tries to call ausize()
* with an unappropriate file descriptor.
* return -1 in this case.
*/
if (isatty(f))
return (-1L);
if (fstat(f, &sb) < 0)
return (-1L);
mode = sb.st_mode & S_IFMT;
if (!S_ISREG(mode) && !S_ISBLK(mode) && !S_ISCHR(mode))
return (-1L);
if (read(f, &hdr, sizeof (hdr)) != sizeof (hdr))
goto err;
if (strncmp((char *)hdr.magic, SUN_AU_MAGIC, 4) != 0)
goto err;
ret = AU_BAD_CODING;
val = a_to_u_4_byte(hdr.encoding);
if (val != SUN_AU_LINEAR16)
goto err;
val = a_to_u_4_byte(hdr.channels);
if (val != 2)
goto err;
val = a_to_u_4_byte(hdr.sample_rate);
if (val != 44100)
goto err;
size = (off_t)a_to_u_4_byte(hdr.hdr_size);
if (size < (off_t)sizeof (hdr) || size > 512)
goto err;
lseek(f, size, SEEK_SET);
/*
* Most .au files don't seem to honor the data_size field,
* so we use the whole file size without the header.
*/
size = sb.st_size - size;
return (size);
err:
lseek(f, (off_t)0L, SEEK_SET);
return ((off_t)ret);
}
BOOL
is_wavname(const char *name)
{
const char *p;
if ((p = strrchr(name, '.')) == NULL)
return (FALSE);
return (streql(p, ".wav") || streql(p, ".WAV"));
}
/*
* Read WAV header, leave file seek pointer past WAV header.
*/
off_t
wavsize(int f)
{
chunk_t chunk;
riff_chunk riff;
fmt_chunk fmt;
struct stat sb;
off_t cursor;
BOOL gotFormat;
mode_t mode;
off_t size;
long ret = AU_BAD_HEADER;
/*
* First check if a bad guy tries to call wavsize()
* with an unappropriate file descriptor.
* return -1 in this case.
*/
if (isatty(f))
return (-1L);
if (fstat(f, &sb) < 0)
return (-1L);
mode = sb.st_mode & S_IFMT;
if (!S_ISREG(mode) && !S_ISBLK(mode) && !S_ISCHR(mode))
return (-1L);
cursor = (off_t)0;
gotFormat = FALSE;
for (;;) {
if (read(f, &chunk, sizeof (chunk)) != sizeof (chunk))
goto err;
size = (off_t)le_a_to_u_long(chunk.cksize);
if (strncmp((char *)chunk.ckid, WAV_RIFF_MAGIC, 4) == 0) {
/*
* We found (first) RIFF header. Check if a WAVE
* magic follows. Set up size to be able to skip
* past this header.
*/
if (read(f, &riff, sizeof (riff)) != sizeof (riff))
goto err;
if (strncmp((char *)riff.wave, WAV_WAVE_MAGIC, 4) != 0)
goto err;
size = (off_t)sizeof (riff);
} else if (strncmp((char *)chunk.ckid, WAV_FMT_MAGIC, 4) == 0) {
/*
* We found WAVE "fmt " header. Check size (if it is
* valid for a WAVE file) and coding whether it is
* useable for a CD.
*/
if (size < (off_t)sizeof (fmt)) goto err;
if (sizeof (fmt) != read(f, &fmt, sizeof (fmt))) goto err;
if (le_a_to_u_short(fmt.channels) != 2 ||
le_a_to_u_long(fmt.sample_rate) != 44100 ||
le_a_to_u_short(fmt.bits_per_sample) != 16) {
ret = AU_BAD_CODING;
goto err;
}
gotFormat = TRUE;
} else if (strncmp((char *)chunk.ckid, WAV_DATA_MAGIC, 4) == 0) {
/*
* We found WAVE "data" header. This contains the
* size value of the audio part.
*/
if (!gotFormat) {
ret = AU_BAD_CODING;
goto err;
}
if ((cursor + size + sizeof (chunk)) > sb.st_size)
size = sb.st_size - (cursor + sizeof (chunk));
return (size);
}
cursor += size + sizeof (chunk);
lseek(f, cursor, SEEK_SET); /* Skip over current chunk */
}
err:
lseek(f, (off_t)0L, SEEK_SET);
return (ret);
}