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mad - MPEG audio decoder Copyright (C) 2000 Robert Leslie $Id: CHANGES,v 1.14 2000/06/03 23:07:41 rob Exp $ =============================================================================== Version 0.11.0 (beta) * Implemented MPEG 2 extension to Lower Sampling Frequencies. * Improved Layer III performance by avoiding IMDCT calculation when all input samples are zero. * Significantly reduced size of Layer II tables. Version 0.10.3 (beta) * Improved SSO output quality. * Made portable to cygwin. * Wrote new Win32 audio interface module. * Localized memory references in III_huffdecode() for better performance. Version 0.10.2 (beta) * Rewrote Layer III long block 36-point IMDCT routine for better performance. * Improved subband synthesis fixed-point games somewhat. Version 0.10.1 (beta) * Added a subband synthesis optimization (SSO) which involves modifying the fixed-point multiplication method during windowing. This produces subtle differences in the output but improves performance greatly. * Added I_STEREO and MS_STEREO flags to frame struct. * Eliminated privately-used CRCFAILED flag. * Fixed a bug where Layer III decoding could crash on some badly-formatted (e.g. non-MPEG) bitstreams. * Miscellaneous code clean-up. * Running madplay with no arguments now gives usage info. Version 0.10.0 (beta) * Added SPARC fixed-point math support. * Revamped libmad API for better high- and low-level support. * Documented more of the code. * Changed sync semantics such that new stream buffers are assumed to be sync-aligned. * Added framework for ID3v2 support. * Changed Layer III to dynamically allocate static memory so as not to waste it (about 6.4K) when only decoding Layer I or Layer II. * Added prefix parsing for output module selection. * Added audio_raw output module. * Rewrote madplay.c to use high-level interface. Version 0.9.7 (beta) * Added audio_hex module (--enable-debugging) for PCM-level debugging. * Fixed bug in audio_sun module; should work correctly now. * Added -Q (very quiet) option to omit bitstream error messages. * Reduced -v output by eliminating timing tenths. * Fixed problem configuring unsupported sample frequencies, and added user feedback. * Enhanced final frame count reporting to include playing time. * Cleaned up madplay.c somewhat. =============================================================================== |