mirror of
https://github.com/cookiengineer/audacity
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110 lines
6.9 KiB
Plaintext
110 lines
6.9 KiB
Plaintext
/**********************************************************************
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* ISO MPEG Audio Subgroup Software Simulation Group (1996)
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* ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
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*
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* $Id$
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*
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* $Log$
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* Revision 1.1 2005/11/15 16:04:26 nhumfrey
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* Changed suffix for files.
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*
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* Revision 1.1.1.1 2005/04/15 01:10:20 nhumfrey
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* Initial import.
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*
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* Revision 1.2 1997/01/19 22:28:29 rowlands
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* Layer 3 bug fixes from Seymour Shlien
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*
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* Revision 1.1 1996/02/14 04:04:23 rowlands
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* Initial revision
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*
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* Received from Mike Coleman
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**********************************************************************/
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/**********************************************************************
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* date programmers comment *
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* 3/01/91 Douglas Wong, start of version 1.1 records *
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* Davis Pan *
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* 3/06/91 Douglas Wong, rename: setup.h to endef.h *
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* removed extraneous variables *
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* 3/21/91 J.Georges Fritsch introduction of the bit-stream *
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* package. This package allows you *
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* to generate the bit-stream in a *
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* binary or ascii format *
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* 3/31/91 Bill Aspromonte replaced the read of the SB matrix *
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* by an "code generated" one *
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* 5/10/91 W. Joseph Carter Ported to Macintosh and Unix. *
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* Incorporated Jean-Georges Fritsch's *
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* "bitstream.c" package. *
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* Modified to strictly adhere to *
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* encoded bitstream specs, including *
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* "Berlin changes". *
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* Modified user interface dialog & code *
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* to accept any input & output *
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* filenames desired. Also added *
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* de-emphasis prompt and final bail-out *
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* opportunity before encoding. *
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* Added AIFF PCM sound file reading *
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* capability. *
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* Modified PCM sound file handling to *
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* process all incoming samples and fill *
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* out last encoded frame with zeros *
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* (silence) if needed. *
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* Located and fixed numerous software *
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* bugs and table data errors. *
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* 27jun91 dpwe (Aware Inc) Used new frame_params struct. *
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* Clear all automatic arrays. *
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* Changed some variable names, *
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* simplified some code. *
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* Track number of bits actually sent. *
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* Fixed padding slot, stereo bitrate *
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* Added joint-stereo : scales L+R. *
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* 6/12/91 Earle Jennings added fix for MS_DOS in obtain_param *
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* 6/13/91 Earle Jennings added stack length adjustment before *
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* main for MS_DOS *
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* 7/10/91 Earle Jennings conversion of all float to FLOAT *
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* port to MsDos from MacIntosh completed*
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* 8/ 8/91 Jens Spille Change for MS-C6.00 *
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* 8/22/91 Jens Spille new obtain_parameters() *
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*10/ 1/91 S.I. Sudharsanan, Ported to IBM AIX platform. *
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* Don H. Lee, *
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* Peter W. Farrett *
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*10/ 3/91 Don H. Lee implemented CRC-16 error protection *
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* newly introduced functions are *
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* I_CRC_calc, II_CRC_calc and encode_CRC*
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* Additions and revisions are marked *
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* with "dhl" for clarity *
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*11/11/91 Katherine Wang Documentation of code. *
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* (variables in documentation are *
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* surround by the # symbol, and an '*'*
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* denotes layer I or II versions) *
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* 2/11/92 W. Joseph Carter Ported new code to Macintosh. Most *
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* important fixes involved changing *
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* 16-bit ints to long or unsigned in *
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* bit alloc routines for quant of 65535 *
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* and passing proper function args. *
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* Removed "Other Joint Stereo" option *
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* and made bitrate be total channel *
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* bitrate, irrespective of the mode. *
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* Fixed many small bugs & reorganized. *
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* 2/25/92 Masahiro Iwadare made code cleaner and more consistent *
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* 8/07/92 Mike Coleman make exit() codes return error status *
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* made slight changes for portability *
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*19 aug 92 Soren H. Nielsen Changed MS-DOS file name extensions. *
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* 8/25/92 Shaun Astarabadi Replaced rint() function with explicit*
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* rounding for portability with MSDOS. *
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* 9/22/92 jddevine@aware.com Fixed _scale_factor_calc() calls. *
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*10/19/92 Masahiro Iwadare added info->mode and info->mode_ext *
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* updates for AIFF format files *
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* 3/10/93 Kevin Peterson In parse_args, only set non default *
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* bit rate if specified in arg list. *
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* Use return value from aiff_read_hdrs *
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* to fseek to start of sound data *
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* 7/26/93 Davis Pan fixed bug in printing info->mode_ext *
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* value for joint stereo condition *
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* 8/27/93 Seymour Shlien, Fixes in Unix and MSDOS ports, *
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* Daniel Lauzon, and *
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* Bill Truerniet *
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* 11/7/95 Soeren H. Nielsen LSF added. Bug fix in MSDOS ext. *
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* 8/02/95 mc@fivebats.com Changed default bitrate selection so *
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* it works with the new LSF stuff *
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*10/01/95 mc@fivebats.com Added layer3 *
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**********************************************************************/ |