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/**********************************************************************
 * ISO MPEG Audio Subgroup Software Simulation Group (1996)
 * ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
 *
 * $Id: musicin.c,v 1.2 1997/01/19 22:28:29 rowlands Exp $
 *
 * $Log: musicin.c,v $
 * Revision 1.2  1997/01/19 22:28:29  rowlands
 * Layer 3 bug fixes from Seymour Shlien
 *
 * Revision 1.1  1996/02/14 04:04:23  rowlands
 * Initial revision
 *
 * Received from Mike Coleman
 **********************************************************************/
/**********************************************************************
 *   date   programmers         comment                               *
 * 3/01/91  Douglas Wong,       start of version 1.1 records          *
 *          Davis Pan                                                 *
 * 3/06/91  Douglas Wong,       rename: setup.h to endef.h            *
 *                              removed extraneous variables          *
 * 3/21/91  J.Georges Fritsch   introduction of the bit-stream        *
 *                              package. This package allows you      *
 *                              to generate the bit-stream in a       *
 *                              binary or ascii format                *
 * 3/31/91  Bill Aspromonte     replaced the read of the SB matrix    *
 *                              by an "code generated" one            *
 * 5/10/91  W. Joseph Carter    Ported to Macintosh and Unix.         *
 *                              Incorporated Jean-Georges Fritsch's   *
 *                              "bitstream.c" package.                *
 *                              Modified to strictly adhere to        *
 *                              encoded bitstream specs, including    *
 *                              "Berlin changes".                     *
 *                              Modified user interface dialog & code *
 *                              to accept any input & output          *
 *                              filenames desired.  Also added        *
 *                              de-emphasis prompt and final bail-out *
 *                              opportunity before encoding.          *
 *                              Added AIFF PCM sound file reading     *
 *                              capability.                           *
 *                              Modified PCM sound file handling to   *
 *                              process all incoming samples and fill *
 *                              out last encoded frame with zeros     *
 *                              (silence) if needed.                  *
 *                              Located and fixed numerous software   *
 *                              bugs and table data errors.           *
 * 27jun91  dpwe (Aware Inc)    Used new frame_params struct.         *
 *                              Clear all automatic arrays.           *
 *                              Changed some variable names,          *
 *                              simplified some code.                 *
 *                              Track number of bits actually sent.   *
 *                              Fixed padding slot, stereo bitrate    *
 *                              Added joint-stereo : scales L+R.      *
 * 6/12/91  Earle Jennings      added fix for MS_DOS in obtain_param  *
 * 6/13/91  Earle Jennings      added stack length adjustment before  *
 *                              main for MS_DOS                       *
 * 7/10/91  Earle Jennings      conversion of all float to FLOAT      *
 *                              port to MsDos from MacIntosh completed*
 * 8/ 8/91  Jens Spille         Change for MS-C6.00                   *
 * 8/22/91  Jens Spille         new obtain_parameters()               *
 *10/ 1/91  S.I. Sudharsanan,   Ported to IBM AIX platform.           *
 *          Don H. Lee,                                               *
 *          Peter W. Farrett                                          *
 *10/ 3/91  Don H. Lee          implemented CRC-16 error protection   *
 *                              newly introduced functions are        *
 *                              I_CRC_calc, II_CRC_calc and encode_CRC*
 *                              Additions and revisions are marked    *
 *                              with "dhl" for clarity                *
 *11/11/91 Katherine Wang       Documentation of code.                *
 *                                (variables in documentation are     *
 *                                surround by the # symbol, and an '*'*
 *                                denotes layer I or II versions)     *
 * 2/11/92  W. Joseph Carter    Ported new code to Macintosh.  Most   *
 *                              important fixes involved changing     *
 *                              16-bit ints to long or unsigned in    *
 *                              bit alloc routines for quant of 65535 *
 *                              and passing proper function args.     *
 *                              Removed "Other Joint Stereo" option   *
 *                              and made bitrate be total channel     *
 *                              bitrate, irrespective of the mode.    *
 *                              Fixed many small bugs & reorganized.  *
 * 2/25/92  Masahiro Iwadare    made code cleaner and more consistent *
 * 8/07/92  Mike Coleman        make exit() codes return error status *
 *                              made slight changes for portability   *
 *19 aug 92 Soren H. Nielsen    Changed MS-DOS file name extensions.  *
 * 8/25/92  Shaun Astarabadi    Replaced rint() function with explicit*
 *                              rounding for portability with MSDOS.  *
 * 9/22/92  jddevine@aware.com  Fixed _scale_factor_calc() calls.     *
 *10/19/92  Masahiro Iwadare    added info->mode and info->mode_ext   *
 *                              updates for AIFF format files         *
 * 3/10/93  Kevin Peterson      In parse_args, only set non default   *
 *                              bit rate if specified in arg list.    *
 *                              Use return value from aiff_read_hdrs  *
 *                              to fseek to start of sound data       *
 * 7/26/93  Davis Pan           fixed bug in printing info->mode_ext  *
 *                              value for joint stereo condition      *
 * 8/27/93 Seymour Shlien,      Fixes in Unix and MSDOS ports,        *
 *         Daniel Lauzon, and                                         *
 *         Bill Truerniet                                             *
 * 11/7/95 Soeren H. Nielsen    LSF added. Bug fix in MSDOS ext.      *
 * 8/02/95 mc@fivebats.com      Changed default bitrate selection so  *
 *                              it works with the new LSF stuff       *
 *10/01/95 mc@fivebats.com      Added layer3                          *
 **********************************************************************/