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add libsndifle 1.0.17 to in tree libs
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3761 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Michael Jerris
878
libs/libsndfile/src/voc.c
Normal file
878
libs/libsndfile/src/voc.c
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@@ -0,0 +1,878 @@
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/*
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** Copyright (C) 2001-2006 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU Lesser General Public License as published by
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** the Free Software Foundation; either version 2.1 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* RANT:
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** The VOC file format is the most brain damaged format I have yet had to deal
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** with. No one programmer could have bee stupid enough to put this together.
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** Instead it looks like a series of manic, dyslexic assembly language programmers
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** hacked it to fit their needs.
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** Utterly woeful.
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*/
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#include "sfconfig.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sndfile.h"
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#include "sfendian.h"
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#include "common.h"
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/*------------------------------------------------------------------------------
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* Typedefs for file chunks.
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*/
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#define VOC_MAX_SECTIONS 200
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enum
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{ VOC_TERMINATOR = 0,
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VOC_SOUND_DATA = 1,
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VOC_SOUND_CONTINUE = 2,
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VOC_SILENCE = 3,
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VOC_MARKER = 4,
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VOC_ASCII = 5,
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VOC_REPEAT = 6,
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VOC_END_REPEAT = 7,
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VOC_EXTENDED = 8,
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VOC_EXTENDED_II = 9
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} ;
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typedef struct
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{ int samples ;
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int offset ; /* Offset of zero => silence. */
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} SND_DATA_BLOCKS ;
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typedef struct
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{ unsigned int sections, section_types ;
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int samplerate, channels, bitwidth ;
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SND_DATA_BLOCKS blocks [VOC_MAX_SECTIONS] ;
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} VOC_DATA ;
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/*------------------------------------------------------------------------------
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* Private static functions.
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*/
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static int voc_close (SF_PRIVATE *psf) ;
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static int voc_write_header (SF_PRIVATE *psf, int calc_length) ;
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static int voc_read_header (SF_PRIVATE *psf) ;
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static const char* voc_encoding2str (int encoding) ;
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#if 0
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/* These functions would be required for files with more than one VOC_SOUND_DATA
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** segment. Not sure whether to bother implementing this.
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*/
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static int voc_multi_init (SF_PRIVATE *psf, VOC_DATA *pvoc) ;
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static int voc_multi_read_uc2s (SF_PRIVATE *psf, short *ptr, int len) ;
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static int voc_multi_read_les2s (SF_PRIVATE *psf, short *ptr, int len) ;
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static int voc_multi_read_uc2i (SF_PRIVATE *psf, int *ptr, int len) ;
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static int voc_multi_read_les2i (SF_PRIVATE *psf, int *ptr, int len) ;
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static int voc_multi_read_uc2f (SF_PRIVATE *psf, float *ptr, int len) ;
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static int voc_multi_read_les2f (SF_PRIVATE *psf, float *ptr, int len) ;
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static int voc_multi_read_uc2d (SF_PRIVATE *psf, double *ptr, int len) ;
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static int voc_multi_read_les2d (SF_PRIVATE *psf, double *ptr, int len) ;
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#endif
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/*------------------------------------------------------------------------------
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** Public function.
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*/
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int
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voc_open (SF_PRIVATE *psf)
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{ int subformat, error = 0 ;
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if (psf->is_pipe)
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return SFE_VOC_NO_PIPE ;
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if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
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{ if ((error = voc_read_header (psf)))
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return error ;
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} ;
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subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
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if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
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{ if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_VOC)
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return SFE_BAD_OPEN_FORMAT ;
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psf->endian = SF_ENDIAN_LITTLE ;
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if ((error = voc_write_header (psf, SF_FALSE)))
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return error ;
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psf->write_header = voc_write_header ;
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} ;
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psf->blockwidth = psf->bytewidth * psf->sf.channels ;
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psf->container_close = voc_close ;
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switch (subformat)
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{ case SF_FORMAT_PCM_U8 :
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case SF_FORMAT_PCM_16 :
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error = pcm_init (psf) ;
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break ;
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case SF_FORMAT_ALAW :
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error = alaw_init (psf) ;
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break ;
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case SF_FORMAT_ULAW :
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error = ulaw_init (psf) ;
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break ;
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default : return SFE_UNIMPLEMENTED ;
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} ;
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return error ;
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} /* voc_open */
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/*------------------------------------------------------------------------------
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*/
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static int
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voc_read_header (SF_PRIVATE *psf)
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{ VOC_DATA *pvoc ;
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char creative [20] ;
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unsigned char block_type, rate_byte ;
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short version, checksum, encoding, dataoffset ;
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int offset ;
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/* Set position to start of file to begin reading header. */
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offset = psf_binheader_readf (psf, "pb", 0, creative, SIGNED_SIZEOF (creative)) ;
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if (creative [sizeof (creative) - 1] != 0x1A)
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return SFE_VOC_NO_CREATIVE ;
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/* Terminate the string. */
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creative [sizeof (creative) - 1] = 0 ;
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if (strcmp ("Creative Voice File", creative))
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return SFE_VOC_NO_CREATIVE ;
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psf_log_printf (psf, "%s\n", creative) ;
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offset += psf_binheader_readf (psf, "e222", &dataoffset, &version, &checksum) ;
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psf->dataoffset = dataoffset ;
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psf_log_printf (psf, "dataoffset : %d\n"
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"version : 0x%X\n"
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"checksum : 0x%X\n", psf->dataoffset, version, checksum) ;
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if (version != 0x010A && version != 0x0114)
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return SFE_VOC_BAD_VERSION ;
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if (! (psf->codec_data = malloc (sizeof (VOC_DATA))))
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return SFE_MALLOC_FAILED ;
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pvoc = (VOC_DATA*) psf->codec_data ;
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memset (pvoc, 0, sizeof (VOC_DATA)) ;
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/* Set the default encoding now. */
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psf->sf.format = SF_FORMAT_VOC ; /* Major format */
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encoding = SF_FORMAT_PCM_U8 ; /* Minor format */
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psf->endian = SF_ENDIAN_LITTLE ;
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while (1)
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{ offset += psf_binheader_readf (psf, "1", &block_type) ;
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switch (block_type)
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{ case VOC_ASCII :
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{ int size ;
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offset += psf_binheader_readf (psf, "e3", &size) ;
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psf_log_printf (psf, " ASCII : %d\n", size) ;
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offset += psf_binheader_readf (psf, "b", psf->header, size) ;
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psf->header [size] = 0 ;
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psf_log_printf (psf, " text : %s\n", psf->header) ;
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} ;
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continue ;
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case VOC_SOUND_DATA :
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case VOC_EXTENDED :
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case VOC_EXTENDED_II :
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break ;
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default : psf_log_printf (psf, "*** Weird block marker (%d)\n", block_type) ;
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} ;
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break ;
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} ;
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if (block_type == VOC_SOUND_DATA)
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{ unsigned char compression ;
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int size ;
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offset += psf_binheader_readf (psf, "e311", &size, &rate_byte, &compression) ;
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psf->sf.samplerate = 1000000 / (256 - (rate_byte & 0xFF)) ;
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psf_log_printf (psf, " Sound Data : %d\n sr : %d => %dHz\n comp : %d\n",
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size, rate_byte, psf->sf.samplerate, compression) ;
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if (offset + size - 1 > psf->filelength)
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{ psf_log_printf (psf, "Seems to be a truncated file.\n") ;
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psf_log_printf (psf, "offset: %d size: %d sum: %d filelength: %D\n", offset, size, offset + size, psf->filelength) ;
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return SFE_VOC_BAD_SECTIONS ;
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}
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else if (offset + size - 1 < psf->filelength)
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{ psf_log_printf (psf, "Seems to be a multi-segment file (#1).\n") ;
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psf_log_printf (psf, "offset: %d size: %d sum: %d filelength: %D\n", offset, size, offset + size, psf->filelength) ;
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return SFE_VOC_BAD_SECTIONS ;
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} ;
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psf->dataoffset = offset ;
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psf->dataend = psf->filelength - 1 ;
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psf->sf.channels = 1 ;
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psf->bytewidth = 1 ;
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_PCM_U8 ;
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return 0 ;
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} ;
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if (block_type == VOC_EXTENDED)
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{ unsigned char pack, stereo, compression ;
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unsigned short rate_short ;
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int size ;
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offset += psf_binheader_readf (psf, "e3211", &size, &rate_short, &pack, &stereo) ;
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psf_log_printf (psf, " Extended : %d\n", size) ;
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if (size == 4)
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psf_log_printf (psf, " size : 4\n") ;
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else
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psf_log_printf (psf, " size : %d (should be 4)\n", size) ;
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psf_log_printf (psf, " pack : %d\n"
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" stereo : %s\n", pack, (stereo ? "yes" : "no")) ;
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if (stereo)
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{ psf->sf.channels = 2 ;
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psf->sf.samplerate = 128000000 / (65536 - rate_short) ;
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}
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else
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{ psf->sf.channels = 1 ;
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psf->sf.samplerate = 256000000 / (65536 - rate_short) ;
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} ;
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psf_log_printf (psf, " sr : %d => %dHz\n", (rate_short & 0xFFFF), psf->sf.samplerate) ;
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offset += psf_binheader_readf (psf, "1", &block_type) ;
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if (block_type != VOC_SOUND_DATA)
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{ psf_log_printf (psf, "*** Expecting VOC_SOUND_DATA section.\n") ;
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return SFE_VOC_BAD_FORMAT ;
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} ;
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offset += psf_binheader_readf (psf, "e311", &size, &rate_byte, &compression) ;
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psf_log_printf (psf, " Sound Data : %d\n"
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" sr : %d\n"
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" comp : %d\n", size, rate_byte, compression) ;
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if (offset + size - 1 > psf->filelength)
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{ psf_log_printf (psf, "Seems to be a truncated file.\n") ;
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psf_log_printf (psf, "offset: %d size: %d sum: %d filelength: %D\n", offset, size, offset + size, psf->filelength) ;
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return SFE_VOC_BAD_SECTIONS ;
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}
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else if (offset + size - 1 < psf->filelength)
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{ psf_log_printf (psf, "Seems to be a multi-segment file (#2).\n") ;
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psf_log_printf (psf, "offset: %d size: %d sum: %d filelength: %D\n", offset, size, offset + size, psf->filelength) ;
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return SFE_VOC_BAD_SECTIONS ;
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} ;
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psf->dataoffset = offset ;
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psf->dataend = psf->filelength - 1 ;
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psf->bytewidth = 1 ;
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_PCM_U8 ;
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return 0 ;
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}
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if (block_type == VOC_EXTENDED_II)
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{ unsigned char bitwidth, channels ;
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int size, fourbytes ;
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offset += psf_binheader_readf (psf, "e341124", &size, &psf->sf.samplerate,
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&bitwidth, &channels, &encoding, &fourbytes) ;
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if (size * 2 == psf->filelength - 39)
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{ int temp_size = psf->filelength - 31 ;
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psf_log_printf (psf, " Extended II : %d (SoX bug: should be %d)\n", size, temp_size) ;
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size = temp_size ;
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}
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else
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psf_log_printf (psf, " Extended II : %d\n", size) ;
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psf_log_printf (psf, " sample rate : %d\n"
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" bit width : %d\n"
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" channels : %d\n", psf->sf.samplerate, bitwidth, channels) ;
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if (bitwidth == 16 && encoding == 0)
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{ encoding = 4 ;
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psf_log_printf (psf, " encoding : 0 (SoX bug: should be 4 for 16 bit signed PCM)\n") ;
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}
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else
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psf_log_printf (psf, " encoding : %d => %s\n", encoding, voc_encoding2str (encoding)) ;
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psf_log_printf (psf, " fourbytes : %X\n", fourbytes) ;
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psf->sf.channels = channels ;
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psf->dataoffset = offset ;
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psf->dataend = psf->filelength - 1 ;
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if (size + 31 == psf->filelength + 1)
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{ /* Hack for reading files produced using
|
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** sf_command (SFC_UPDATE_HEADER_NOW).
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*/
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psf_log_printf (psf, "Missing zero byte at end of file.\n") ;
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size = psf->filelength - 30 ;
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psf->dataend = 0 ;
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}
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else if (size + 31 > psf->filelength)
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{ psf_log_printf (psf, "Seems to be a truncated file.\n") ;
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size = psf->filelength - 31 ;
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}
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else if (size + 31 < psf->filelength)
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psf_log_printf (psf, "Seems to be a multi-segment file (#3).\n") ;
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switch (encoding)
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{ case 0 :
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_PCM_U8 ;
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psf->bytewidth = 1 ;
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break ;
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case 4 :
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_PCM_16 ;
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psf->bytewidth = 2 ;
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break ;
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case 6 :
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_ALAW ;
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psf->bytewidth = 1 ;
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break ;
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||||
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case 7 :
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psf->sf.format = SF_FORMAT_VOC | SF_FORMAT_ULAW ;
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psf->bytewidth = 1 ;
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break ;
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||||
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default : /* Unknown */
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return SFE_UNKNOWN_FORMAT ;
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||||
break ;
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||||
} ;
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||||
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} ;
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||||
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return 0 ;
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} /* voc_read_header */
|
||||
|
||||
/*====================================================================================
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||||
*/
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||||
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||||
static int
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||||
voc_write_header (SF_PRIVATE *psf, int calc_length)
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{ sf_count_t current ;
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||||
int rate_const, subformat ;
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||||
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current = psf_ftell (psf) ;
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||||
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if (calc_length)
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{ psf->filelength = psf_get_filelen (psf) ;
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psf->datalength = psf->filelength - psf->dataoffset ;
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if (psf->dataend)
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psf->datalength -= psf->filelength - psf->dataend ;
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||||
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psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
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} ;
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||||
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||||
subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
|
||||
/* Reset the current header length to zero. */
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psf->header [0] = 0 ;
|
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psf->headindex = 0 ;
|
||||
psf_fseek (psf, 0, SEEK_SET) ;
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||||
/* VOC marker and 0x1A byte. */
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psf_binheader_writef (psf, "eb1", "Creative Voice File", make_size_t (19), 0x1A) ;
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||||
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/* Data offset, version and other. */
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psf_binheader_writef (psf, "e222", 26, 0x0114, 0x111F) ;
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||||
|
||||
/* Use same logic as SOX.
|
||||
** If the file is mono 8 bit data, use VOC_SOUND_DATA.
|
||||
** If the file is mono 16 bit data, use VOC_EXTENED.
|
||||
** Otherwise use VOC_EXTENED_2.
|
||||
*/
|
||||
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||||
if (subformat == SF_FORMAT_PCM_U8 && psf->sf.channels == 1)
|
||||
{ /* samplerate = 1000000 / (256 - rate_const) ; */
|
||||
rate_const = 256 - 1000000 / psf->sf.samplerate ;
|
||||
|
||||
/* First type marker, length, rate_const and compression */
|
||||
psf_binheader_writef (psf, "e1311", VOC_SOUND_DATA, (int) (psf->datalength + 1), rate_const, 0) ;
|
||||
}
|
||||
else if (subformat == SF_FORMAT_PCM_U8 && psf->sf.channels == 2)
|
||||
{ /* sample_rate = 128000000 / (65536 - rate_short) ; */
|
||||
rate_const = 65536 - 128000000 / psf->sf.samplerate ;
|
||||
|
||||
/* First write the VOC_EXTENDED section
|
||||
** marker, length, rate_const and compression
|
||||
*/
|
||||
psf_binheader_writef (psf, "e13211", VOC_EXTENDED, 4, rate_const, 0, 1) ;
|
||||
|
||||
/* samplerate = 1000000 / (256 - rate_const) ; */
|
||||
rate_const = 256 - 1000000 / psf->sf.samplerate ;
|
||||
|
||||
/* Now write the VOC_SOUND_DATA section
|
||||
** marker, length, rate_const and compression
|
||||
*/
|
||||
psf_binheader_writef (psf, "e1311", VOC_SOUND_DATA, (int) (psf->datalength + 1), rate_const, 0) ;
|
||||
}
|
||||
else
|
||||
{ int length ;
|
||||
|
||||
if (psf->sf.channels < 1 || psf->sf.channels > 2)
|
||||
return SFE_CHANNEL_COUNT ;
|
||||
|
||||
switch (subformat)
|
||||
{ case SF_FORMAT_PCM_U8 :
|
||||
psf->bytewidth = 1 ;
|
||||
length = psf->sf.frames * psf->sf.channels * psf->bytewidth + 12 ;
|
||||
/* Marker, length, sample rate, bitwidth, stereo flag, encoding and fourt zero bytes. */
|
||||
psf_binheader_writef (psf, "e1341124", VOC_EXTENDED_II, length, psf->sf.samplerate, 16, psf->sf.channels, 4, 0) ;
|
||||
break ;
|
||||
|
||||
case SF_FORMAT_PCM_16 :
|
||||
psf->bytewidth = 2 ;
|
||||
length = psf->sf.frames * psf->sf.channels * psf->bytewidth + 12 ;
|
||||
/* Marker, length, sample rate, bitwidth, stereo flag, encoding and fourt zero bytes. */
|
||||
psf_binheader_writef (psf, "e1341124", VOC_EXTENDED_II, length, psf->sf.samplerate, 16, psf->sf.channels, 4, 0) ;
|
||||
break ;
|
||||
|
||||
case SF_FORMAT_ALAW :
|
||||
psf->bytewidth = 1 ;
|
||||
length = psf->sf.frames * psf->sf.channels * psf->bytewidth + 12 ;
|
||||
psf_binheader_writef (psf, "e1341124", VOC_EXTENDED_II, length, psf->sf.samplerate, 8, psf->sf.channels, 6, 0) ;
|
||||
break ;
|
||||
|
||||
case SF_FORMAT_ULAW :
|
||||
psf->bytewidth = 1 ;
|
||||
length = psf->sf.frames * psf->sf.channels * psf->bytewidth + 12 ;
|
||||
psf_binheader_writef (psf, "e1341124", VOC_EXTENDED_II, length, psf->sf.samplerate, 8, psf->sf.channels, 7, 0) ;
|
||||
break ;
|
||||
|
||||
default : return SFE_UNIMPLEMENTED ;
|
||||
} ;
|
||||
} ;
|
||||
|
||||
psf_fwrite (psf->header, psf->headindex, 1, psf) ;
|
||||
|
||||
if (psf->error)
|
||||
return psf->error ;
|
||||
|
||||
psf->dataoffset = psf->headindex ;
|
||||
|
||||
if (current > 0)
|
||||
psf_fseek (psf, current, SEEK_SET) ;
|
||||
|
||||
return psf->error ;
|
||||
} /* voc_write_header */
|
||||
|
||||
static int
|
||||
voc_close (SF_PRIVATE *psf)
|
||||
{
|
||||
if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
|
||||
{ /* Now we know for certain the length of the file we can re-write
|
||||
** correct values for the FORM, 8SVX and BODY chunks.
|
||||
*/
|
||||
unsigned byte = VOC_TERMINATOR ;
|
||||
|
||||
|
||||
psf_fseek (psf, 0, SEEK_END) ;
|
||||
|
||||
/* Write terminator */
|
||||
psf_fwrite (&byte, 1, 1, psf) ;
|
||||
|
||||
voc_write_header (psf, SF_TRUE) ;
|
||||
} ;
|
||||
|
||||
return 0 ;
|
||||
} /* voc_close */
|
||||
|
||||
static const char*
|
||||
voc_encoding2str (int encoding)
|
||||
{
|
||||
switch (encoding)
|
||||
{ case 0 : return "8 bit unsigned PCM" ;
|
||||
case 4 : return "16 bit signed PCM" ;
|
||||
case 6 : return "A-law" ;
|
||||
case 7 : return "u-law" ;
|
||||
default : break ;
|
||||
}
|
||||
return "*** Unknown ***" ;
|
||||
} /* voc_encoding2str */
|
||||
|
||||
/*====================================================================================
|
||||
*/
|
||||
|
||||
#if 0
|
||||
static int
|
||||
voc_multi_init (SF_PRIVATE *psf, VOC_DATA *pvoc)
|
||||
{
|
||||
psf->sf.frames = 0 ;
|
||||
|
||||
if (pvoc->bitwidth == 8)
|
||||
{ psf->read_short = voc_multi_read_uc2s ;
|
||||
psf->read_int = voc_multi_read_uc2i ;
|
||||
psf->read_float = voc_multi_read_uc2f ;
|
||||
psf->read_double = voc_multi_read_uc2d ;
|
||||
return 0 ;
|
||||
} ;
|
||||
|
||||
if (pvoc->bitwidth == 16)
|
||||
{ psf->read_short = voc_multi_read_les2s ;
|
||||
psf->read_int = voc_multi_read_les2i ;
|
||||
psf->read_float = voc_multi_read_les2f ;
|
||||
psf->read_double = voc_multi_read_les2d ;
|
||||
return 0 ;
|
||||
} ;
|
||||
|
||||
psf_log_printf (psf, "Error : bitwith != 8 && bitwidth != 16.\n") ;
|
||||
|
||||
return SFE_UNIMPLEMENTED ;
|
||||
} /* voc_multi_read_int */
|
||||
|
||||
/*------------------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
static int
|
||||
voc_multi_read_uc2s (SF_PRIVATE *psf, short *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_uc2s */
|
||||
|
||||
static int
|
||||
voc_multi_read_les2s (SF_PRIVATE *psf, short *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_les2s */
|
||||
|
||||
|
||||
static int
|
||||
voc_multi_read_uc2i (SF_PRIVATE *psf, int *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_uc2i */
|
||||
|
||||
static int
|
||||
voc_multi_read_les2i (SF_PRIVATE *psf, int *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_les2i */
|
||||
|
||||
|
||||
static int
|
||||
voc_multi_read_uc2f (SF_PRIVATE *psf, float *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_uc2f */
|
||||
|
||||
static int
|
||||
voc_multi_read_les2f (SF_PRIVATE *psf, float *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_les2f */
|
||||
|
||||
|
||||
static int
|
||||
voc_multi_read_uc2d (SF_PRIVATE *psf, double *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_uc2d */
|
||||
|
||||
static int
|
||||
voc_multi_read_les2d (SF_PRIVATE *psf, double *ptr, int len)
|
||||
{
|
||||
|
||||
return 0 ;
|
||||
} /* voc_multi_read_les2d */
|
||||
|
||||
#endif
|
||||
|
||||
/*------------------------------------------------------------------------------------
|
||||
|
||||
Creative Voice (VOC) file format
|
||||
--------------------------------
|
||||
|
||||
~From: galt@dsd.es.com
|
||||
|
||||
(byte numbers are hex!)
|
||||
|
||||
HEADER (bytes 00-19)
|
||||
Series of DATA BLOCKS (bytes 1A+) [Must end w/ Terminator Block]
|
||||
|
||||
- ---------------------------------------------------------------
|
||||
|
||||
HEADER:
|
||||
=======
|
||||
byte # Description
|
||||
------ ------------------------------------------
|
||||
00-12 "Creative Voice File"
|
||||
13 1A (eof to abort printing of file)
|
||||
14-15 Offset of first datablock in .voc file (std 1A 00
|
||||
in Intel Notation)
|
||||
16-17 Version number (minor,major) (VOC-HDR puts 0A 01)
|
||||
18-19 1's Comp of Ver. # + 1234h (VOC-HDR puts 29 11)
|
||||
|
||||
- ---------------------------------------------------------------
|
||||
|
||||
DATA BLOCK:
|
||||
===========
|
||||
|
||||
Data Block: TYPE(1-byte), SIZE(3-bytes), INFO(0+ bytes)
|
||||
NOTE: Terminator Block is an exception -- it has only the TYPE byte.
|
||||
|
||||
TYPE Description Size (3-byte int) Info
|
||||
---- ----------- ----------------- -----------------------
|
||||
00 Terminator (NONE) (NONE)
|
||||
01 Sound data 2+length of data *
|
||||
02 Sound continue length of data Voice Data
|
||||
03 Silence 3 **
|
||||
04 Marker 2 Marker# (2 bytes)
|
||||
05 ASCII length of string null terminated string
|
||||
06 Repeat 2 Count# (2 bytes)
|
||||
07 End repeat 0 (NONE)
|
||||
08 Extended 4 ***
|
||||
|
||||
*Sound Info Format:
|
||||
---------------------
|
||||
00 Sample Rate
|
||||
01 Compression Type
|
||||
02+ Voice Data
|
||||
|
||||
**Silence Info Format:
|
||||
----------------------------
|
||||
00-01 Length of silence - 1
|
||||
02 Sample Rate
|
||||
|
||||
|
||||
***Extended Info Format:
|
||||
---------------------
|
||||
00-01 Time Constant: Mono: 65536 - (256000000/sample_rate)
|
||||
Stereo: 65536 - (25600000/(2*sample_rate))
|
||||
02 Pack
|
||||
03 Mode: 0 = mono
|
||||
1 = stereo
|
||||
|
||||
|
||||
Marker# -- Driver keeps the most recent marker in a status byte
|
||||
Count# -- Number of repetitions + 1
|
||||
Count# may be 1 to FFFE for 0 - FFFD repetitions
|
||||
or FFFF for endless repetitions
|
||||
Sample Rate -- SR byte = 256-(1000000/sample_rate)
|
||||
Length of silence -- in units of sampling cycle
|
||||
Compression Type -- of voice data
|
||||
8-bits = 0
|
||||
4-bits = 1
|
||||
2.6-bits = 2
|
||||
2-bits = 3
|
||||
Multi DAC = 3+(# of channels) [interesting--
|
||||
this isn't in the developer's manual]
|
||||
|
||||
|
||||
---------------------------------------------------------------------------------
|
||||
Addendum submitted by Votis Kokavessis:
|
||||
|
||||
After some experimenting with .VOC files I found out that there is a Data Block
|
||||
Type 9, which is not covered in the VOC.TXT file. Here is what I was able to discover
|
||||
about this block type:
|
||||
|
||||
|
||||
TYPE: 09
|
||||
SIZE: 12 + length of data
|
||||
INFO: 12 (twelve) bytes
|
||||
|
||||
INFO STRUCTURE:
|
||||
|
||||
Bytes 0-1: (Word) Sample Rate (e.g. 44100)
|
||||
Bytes 2-3: zero (could be that bytes 0-3 are a DWord for Sample Rate)
|
||||
Byte 4: Sample Size in bits (e.g. 16)
|
||||
Byte 5: Number of channels (e.g. 1 for mono, 2 for stereo)
|
||||
Byte 6: Unknown (equal to 4 in all files I examined)
|
||||
Bytes 7-11: zero
|
||||
|
||||
|
||||
-------------------------------------------------------------------------------------*/
|
||||
|
||||
/*=====================================================================================
|
||||
**=====================================================================================
|
||||
**=====================================================================================
|
||||
**=====================================================================================
|
||||
*/
|
||||
|
||||
/*------------------------------------------------------------------------
|
||||
The following is taken from the Audio File Formats FAQ dated 2-Jan-1995
|
||||
and submitted by Guido van Rossum <guido@cwi.nl>.
|
||||
--------------------------------------------------------------------------
|
||||
Creative Voice (VOC) file format
|
||||
--------------------------------
|
||||
|
||||
From: galt@dsd.es.com
|
||||
|
||||
(byte numbers are hex!)
|
||||
|
||||
HEADER (bytes 00-19)
|
||||
Series of DATA BLOCKS (bytes 1A+) [Must end w/ Terminator Block]
|
||||
|
||||
- ---------------------------------------------------------------
|
||||
|
||||
HEADER:
|
||||
-------
|
||||
byte # Description
|
||||
------ ------------------------------------------
|
||||
00-12 "Creative Voice File"
|
||||
13 1A (eof to abort printing of file)
|
||||
14-15 Offset of first datablock in .voc file (std 1A 00
|
||||
in Intel Notation)
|
||||
16-17 Version number (minor,major) (VOC-HDR puts 0A 01)
|
||||
18-19 2's Comp of Ver. # + 1234h (VOC-HDR puts 29 11)
|
||||
|
||||
- ---------------------------------------------------------------
|
||||
|
||||
DATA BLOCK:
|
||||
-----------
|
||||
|
||||
Data Block: TYPE(1-byte), SIZE(3-bytes), INFO(0+ bytes)
|
||||
NOTE: Terminator Block is an exception -- it has only the TYPE byte.
|
||||
|
||||
TYPE Description Size (3-byte int) Info
|
||||
---- ----------- ----------------- -----------------------
|
||||
00 Terminator (NONE) (NONE)
|
||||
01 Sound data 2+length of data *
|
||||
02 Sound continue length of data Voice Data
|
||||
03 Silence 3 **
|
||||
04 Marker 2 Marker# (2 bytes)
|
||||
05 ASCII length of string null terminated string
|
||||
06 Repeat 2 Count# (2 bytes)
|
||||
07 End repeat 0 (NONE)
|
||||
08 Extended 4 ***
|
||||
|
||||
*Sound Info Format: **Silence Info Format:
|
||||
--------------------- ----------------------------
|
||||
00 Sample Rate 00-01 Length of silence - 1
|
||||
01 Compression Type 02 Sample Rate
|
||||
02+ Voice Data
|
||||
|
||||
***Extended Info Format:
|
||||
---------------------
|
||||
00-01 Time Constant: Mono: 65536 - (256000000/sample_rate)
|
||||
Stereo: 65536 - (25600000/(2*sample_rate))
|
||||
02 Pack
|
||||
03 Mode: 0 = mono
|
||||
1 = stereo
|
||||
|
||||
|
||||
Marker# -- Driver keeps the most recent marker in a status byte
|
||||
Count# -- Number of repetitions + 1
|
||||
Count# may be 1 to FFFE for 0 - FFFD repetitions
|
||||
or FFFF for endless repetitions
|
||||
Sample Rate -- SR byte = 256-(1000000/sample_rate)
|
||||
Length of silence -- in units of sampling cycle
|
||||
Compression Type -- of voice data
|
||||
8-bits = 0
|
||||
4-bits = 1
|
||||
2.6-bits = 2
|
||||
2-bits = 3
|
||||
Multi DAC = 3+(# of channels) [interesting--
|
||||
this isn't in the developer's manual]
|
||||
|
||||
Detailed description of new data blocks (VOC files version 1.20 and above):
|
||||
|
||||
(Source is fax from Barry Boone at Creative Labs, 405/742-6622)
|
||||
|
||||
BLOCK 8 - digitized sound attribute extension, must preceed block 1.
|
||||
Used to define stereo, 8 bit audio
|
||||
BYTE bBlockID; // = 8
|
||||
BYTE nBlockLen[3]; // 3 byte length
|
||||
WORD wTimeConstant; // time constant = same as block 1
|
||||
BYTE bPackMethod; // same as in block 1
|
||||
BYTE bVoiceMode; // 0-mono, 1-stereo
|
||||
|
||||
Data is stored left, right
|
||||
|
||||
BLOCK 9 - data block that supersedes blocks 1 and 8.
|
||||
Used for stereo, 16 bit.
|
||||
|
||||
BYTE bBlockID; // = 9
|
||||
BYTE nBlockLen[3]; // length 12 plus length of sound
|
||||
DWORD dwSamplesPerSec; // samples per second, not time const.
|
||||
BYTE bBitsPerSample; // e.g., 8 or 16
|
||||
BYTE bChannels; // 1 for mono, 2 for stereo
|
||||
WORD wFormat; // see below
|
||||
BYTE reserved[4]; // pad to make block w/o data
|
||||
// have a size of 16 bytes
|
||||
|
||||
Valid values of wFormat are:
|
||||
|
||||
0x0000 8-bit unsigned PCM
|
||||
0x0001 Creative 8-bit to 4-bit ADPCM
|
||||
0x0002 Creative 8-bit to 3-bit ADPCM
|
||||
0x0003 Creative 8-bit to 2-bit ADPCM
|
||||
0x0004 16-bit signed PCM
|
||||
0x0006 CCITT a-Law
|
||||
0x0007 CCITT u-Law
|
||||
0x02000 Creative 16-bit to 4-bit ADPCM
|
||||
|
||||
Data is stored left, right
|
||||
|
||||
------------------------------------------------------------------------*/
|
||||
/*
|
||||
** Do not edit or modify anything in this comment block.
|
||||
** The arch-tag line is a file identity tag for the GNU Arch
|
||||
** revision control system.
|
||||
**
|
||||
** arch-tag: 40a50167-a81c-463a-9e1d-3282ff84e09d
|
||||
*/
|
||||
Reference in New Issue
Block a user