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/**********************************************************************
* ISO MPEG Audio Subgroup Software Simulation Group (1996)
* ISO 13818-3 MPEG-2 Audio Encoder - Lower Sampling Frequency Extension
*
* $Id: tonal.c,v 1.1 1996/02/14 04:04:23 rowlands Exp $
*
* $Log: tonal.c,v $
* Revision 1.1 1996/02/14 04:04:23 rowlands
* Initial revision
*
* Received from Mike Coleman
**********************************************************************/
/**********************************************************************
* date programmers comment *
* 2/25/91 Douglas Wong start of version 1.1 records *
* 3/06/91 Douglas Wong rename: setup.h to endef.h *
* updated I_psycho_one and II_psycho_one*
* 3/11/91 W. J. Carter Added Douglas Wong's updates dated *
* 3/9/91 for I_Psycho_One() and for *
* II_Psycho_One(). *
* 5/10/91 W. Joseph Carter Ported to Macintosh and Unix. *
* Located and fixed numerous software *
* bugs and table data errors. *
* 6/11/91 Davis Pan corrected several bugs *
* based on comments from H. Fuchs *
* 01jul91 dpwe (Aware Inc.) Made pow() args float *
* Removed logical bug in I_tonal_label: *
* Sometimes *tone returned == STOP *
* 7/10/91 Earle Jennings no change necessary in port to MsDos *
* 11sep91 dpwe@aware.com Subtracted 90.3dB from II_f_f_t peaks *
* 10/1/91 Peter W. Farrett Updated II_Psycho_One(),I_Psycho_One()*
* to include comments. *
*11/29/91 Masahiro Iwadare Bug fix regarding POWERNORM *
* fixed several other miscellaneous bugs*
* 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. *
* 2/12/92 Masahiro Iwadare Fixed some potential bugs in *
* Davis Pan subsampling() *
* 2/25/92 Masahiro Iwadare Fixed some more potential bugs *
* 6/24/92 Tan Ah Peng Modified window for FFT *
* (denominator N-1 to N) *
* Updated all critical band rate & *
* absolute threshold tables and critical*
* boundaries for use with Layer I & II *
* Corrected boundary limits for tonal *
* component computation *
* Placement of non-tonal component at *
* geometric mean of critical band *
* (previous placement method commented *
* out - can be used if desired) *
* 3/01/93 Mike Li Infinite looping fix in noise_label() *
* 3/19/93 Jens Spille fixed integer overflow problem in *
* psychoacoutic model 1 *
* 3/19/93 Giorgio Dimino modifications to better account for *
* tonal and non-tonal components *
* 5/28/93 Sriram Jayasimha "London" mod. to psychoacoustic model1*
* 8/05/93 Masahiro Iwadare noise_label modification "option" *
* 1/21/94 Seymore Shlien fixed another infinite looping problem*
* 7/12/95 Soeren H. Nielsen Changes for LSF, new tables *
**********************************************************************/
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