kenmirrors
/
freeswitch
mirror of https://github.com/signalwire/freeswitch.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
freeswitch/libs/libsndfile/src/txw.c

373 lines
9.5 KiB
C
Raw Blame History

/*
** Copyright (C) 2002-2009 Erik de Castro Lopo <erikd@mega-nerd.com>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation; either version 2.1 of the License, or
** (at your option) any later version.
**
** 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 Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*===========================================================================
** Yamaha TX16 Sampler Files.
**
** This header parser was written using information from the SoX source code
** and trial and error experimentation. The code here however is all original.
*/
#include "sfconfig.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include "sndfile.h"
#include "sfendian.h"
#include "common.h"
#if (ENABLE_EXPERIMENTAL_CODE == 0)
int
txw_open (SF_PRIVATE *psf)
{ if (psf)
return SFE_UNIMPLEMENTED ;
return 0 ;
} /* txw_open */
#else
/*------------------------------------------------------------------------------
** Markers.
*/
#define TXW_DATA_OFFSET 32
#define TXW_LOOPED 0x49
#define TXW_NO_LOOP 0xC9
/*------------------------------------------------------------------------------
** Private static functions.
*/
static int txw_read_header (SF_PRIVATE *psf) ;
static sf_count_t txw_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len) ;
static sf_count_t txw_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len) ;
static sf_count_t txw_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len) ;
static sf_count_t txw_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len) ;
static sf_count_t txw_seek (SF_PRIVATE *psf, int mode, sf_count_t offset) ;
/*------------------------------------------------------------------------------
** Public functions.
*/
/*
* ftp://ftp.t0.or.at/pub/sound/tx16w/samples.yamaha
* ftp://ftp.t0.or.at/pub/sound/tx16w/faq/tx16w.tec
* http://www.t0.or.at/~mpakesch/tx16w/
*
* from tx16w.c sox 12.15: (7-Oct-98) (Mark Lakata and Leigh Smith)
* char filetype[6] "LM8953"
* nulls[10],
* dummy_aeg[6]
* format 0x49 = looped, 0xC9 = non-looped
* sample_rate 1 = 33 kHz, 2 = 50 kHz, 3 = 16 kHz
* atc_length[3] if sample rate 0, [2]&0xfe = 6: 33kHz, 0x10:50, 0xf6: 16,
* depending on [5] but to heck with it
* rpt_length[3] (these are for looped samples, attack and loop lengths)
* unused[2]
*/
typedef struct
{ unsigned char format, srate, sr2, sr3 ;
unsigned short srhash ;
unsigned int attacklen, repeatlen ;
} TXW_HEADER ;
#define ERROR_666 666
int
txw_open (SF_PRIVATE *psf)
{ int error ;
if (psf->mode != SFM_READ)
return SFE_UNIMPLEMENTED ;
if ((error = txw_read_header (psf)))
return error ;
if (psf_fseek (psf, psf->dataoffset, SEEK_SET) != psf->dataoffset)
return SFE_BAD_SEEK ;
psf->read_short = txw_read_s ;
psf->read_int = txw_read_i ;
psf->read_float = txw_read_f ;
psf->read_double = txw_read_d ;
psf->seek = txw_seek ;
return 0 ;
} /* txw_open */
/*------------------------------------------------------------------------------
*/
static int
txw_read_header (SF_PRIVATE *psf)
{ TXW_HEADER txwh ;
const char *strptr ;
memset (&txwh, 0, sizeof (txwh)) ;
memset (psf->u.cbuf, 0, sizeof (psf->u.cbuf)) ;
psf_binheader_readf (psf, "pb", 0, psf->u.cbuf, 16) ;
if (memcmp (psf->u.cbuf, "LM8953\0\0\0\0\0\0\0\0\0\0", 16) != 0)
return ERROR_666 ;
psf_log_printf (psf, "Read only : Yamaha TX-16 Sampler (.txw)\nLM8953\n") ;
/* Jump 6 bytes (dummp_aeg), read format, read sample rate. */
psf_binheader_readf (psf, "j11", 6, &txwh.format, &txwh.srate) ;
/* 8 bytes (atc_length[3], rpt_length[3], unused[2]). */
psf_binheader_readf (psf, "e33j", &txwh.attacklen, &txwh.repeatlen, 2) ;
txwh.sr2 = (txwh.attacklen >> 16) & 0xFE ;
txwh.sr3 = (txwh.repeatlen >> 16) & 0xFE ;
txwh.attacklen &= 0x1FFFF ;
txwh.repeatlen &= 0x1FFFF ;
switch (txwh.format)
{ case TXW_LOOPED :
strptr = "looped" ;
break ;
case TXW_NO_LOOP :
strptr = "non-looped" ;
break ;
default :
psf_log_printf (psf, " Format : 0x%02x => ?????\n", txwh.format) ;
return ERROR_666 ;
} ;
psf_log_printf (psf, " Format : 0x%02X => %s\n", txwh.format, strptr) ;
strptr = NULL ;
switch (txwh.srate)
{ case 1 :
psf->sf.samplerate = 33333 ;
break ;
case 2 :
psf->sf.samplerate = 50000 ;
break ;
case 3 :
psf->sf.samplerate = 16667 ;
break ;
default :
/* This is ugly and braindead. */
txwh.srhash = ((txwh.sr2 & 0xFE) << 8) | (txwh.sr3 & 0xFE) ;
switch (txwh.srhash)
{ case ((0x6 << 8) | 0x52) :
psf->sf.samplerate = 33333 ;
break ;
case ((0x10 << 8) | 0x52) :
psf->sf.samplerate = 50000 ;
break ;
case ((0xF6 << 8) | 0x52) :
psf->sf.samplerate = 166667 ;
break ;
default :
strptr = " Sample Rate : Unknown : forcing to 33333\n" ;
psf->sf.samplerate = 33333 ;
break ;
} ;
} ;
if (strptr)
psf_log_printf (psf, strptr) ;
else if (txwh.srhash)
psf_log_printf (psf, " Sample Rate : %d (0x%X) => %d\n", txwh.srate, txwh.srhash, psf->sf.samplerate) ;
else
psf_log_printf (psf, " Sample Rate : %d => %d\n", txwh.srate, psf->sf.samplerate) ;
if (txwh.format == TXW_LOOPED)
{ psf_log_printf (psf, " Attack Len : %d\n", txwh.attacklen) ;
psf_log_printf (psf, " Repeat Len : %d\n", txwh.repeatlen) ;
} ;
psf->dataoffset = TXW_DATA_OFFSET ;
psf->datalength = psf->filelength - TXW_DATA_OFFSET ;
psf->sf.frames = 2 * psf->datalength / 3 ;
if (psf->datalength % 3 == 1)
psf_log_printf (psf, "*** File seems to be truncated, %d extra bytes.\n",
(int) (psf->datalength % 3)) ;
if (txwh.attacklen + txwh.repeatlen > psf->sf.frames)
psf_log_printf (psf, "*** File has been truncated.\n") ;
psf->sf.format = SF_FORMAT_TXW | SF_FORMAT_PCM_16 ;
psf->sf.channels = 1 ;
psf->sf.sections = 1 ;
psf->sf.seekable = SF_TRUE ;
return 0 ;
} /* txw_read_header */
static sf_count_t
txw_read_s (SF_PRIVATE *psf, short *ptr, sf_count_t len)
{ unsigned char *ucptr ;
short sample ;
int k, bufferlen, readcount, count ;
sf_count_t total = 0 ;
bufferlen = sizeof (psf->u.cbuf) / 3 ;
bufferlen -= (bufferlen & 1) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = psf_fread (psf->u.cbuf, 3, readcount, psf) ;
ucptr = psf->u.ucbuf ;
for (k = 0 ; k < readcount ; k += 2)
{ sample = (ucptr [0] << 8) | (ucptr [1] & 0xF0) ;
ptr [total + k] = sample ;
sample = (ucptr [2] << 8) | ((ucptr [1] & 0xF) << 4) ;
ptr [total + k + 1] = sample ;
ucptr += 3 ;
} ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* txw_read_s */
static sf_count_t
txw_read_i (SF_PRIVATE *psf, int *ptr, sf_count_t len)
{ unsigned char *ucptr ;
short sample ;
int k, bufferlen, readcount, count ;
sf_count_t total = 0 ;
bufferlen = sizeof (psf->u.cbuf) / 3 ;
bufferlen -= (bufferlen & 1) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = psf_fread (psf->u.cbuf, 3, readcount, psf) ;
ucptr = psf->u.ucbuf ;
for (k = 0 ; k < readcount ; k += 2)
{ sample = (ucptr [0] << 8) | (ucptr [1] & 0xF0) ;
ptr [total + k] = sample << 16 ;
sample = (ucptr [2] << 8) | ((ucptr [1] & 0xF) << 4) ;
ptr [total + k + 1] = sample << 16 ;
ucptr += 3 ;
} ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* txw_read_i */
static sf_count_t
txw_read_f (SF_PRIVATE *psf, float *ptr, sf_count_t len)
{ unsigned char *ucptr ;
short sample ;
int k, bufferlen, readcount, count ;
sf_count_t total = 0 ;
float normfact ;
if (psf->norm_float == SF_TRUE)
normfact = 1.0 / 0x8000 ;
else
normfact = 1.0 / 0x10 ;
bufferlen = sizeof (psf->u.cbuf) / 3 ;
bufferlen -= (bufferlen & 1) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = psf_fread (psf->u.cbuf, 3, readcount, psf) ;
ucptr = psf->u.ucbuf ;
for (k = 0 ; k < readcount ; k += 2)
{ sample = (ucptr [0] << 8) | (ucptr [1] & 0xF0) ;
ptr [total + k] = normfact * sample ;
sample = (ucptr [2] << 8) | ((ucptr [1] & 0xF) << 4) ;
ptr [total + k + 1] = normfact * sample ;
ucptr += 3 ;
} ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* txw_read_f */
static sf_count_t
txw_read_d (SF_PRIVATE *psf, double *ptr, sf_count_t len)
{ unsigned char *ucptr ;
short sample ;
int k, bufferlen, readcount, count ;
sf_count_t total = 0 ;
double normfact ;
if (psf->norm_double == SF_TRUE)
normfact = 1.0 / 0x8000 ;
else
normfact = 1.0 / 0x10 ;
bufferlen = sizeof (psf->u.cbuf) / 3 ;
bufferlen -= (bufferlen & 1) ;
while (len > 0)
{ readcount = (len >= bufferlen) ? bufferlen : len ;
count = psf_fread (psf->u.cbuf, 3, readcount, psf) ;
ucptr = psf->u.ucbuf ;
for (k = 0 ; k < readcount ; k += 2)
{ sample = (ucptr [0] << 8) | (ucptr [1] & 0xF0) ;
ptr [total + k] = normfact * sample ;
sample = (ucptr [2] << 8) | ((ucptr [1] & 0xF) << 4) ;
ptr [total + k + 1] = normfact * sample ;
ucptr += 3 ;
} ;
total += count ;
len -= readcount ;
} ;
return total ;
} /* txw_read_d */
static sf_count_t
txw_seek (SF_PRIVATE *psf, int mode, sf_count_t offset)
{ if (psf && mode)
return offset ;
return 0 ;
} /* txw_seek */
#endif
Reference in New Issue View Git Blame Copy Permalink