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Diffstat (limited to 'src/libmad/CHANGES')
| -rw-r--r-- | src/libmad/CHANGES | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/src/libmad/CHANGES b/src/libmad/CHANGES index 9291760b9..e69de29bb 100644 --- a/src/libmad/CHANGES +++ b/src/libmad/CHANGES @@ -1,338 +0,0 @@ - - libmad - MPEG audio decoder library - Copyright (C) 2000-2004 Underbit Technologies, Inc. - - $Id: CHANGES,v 1.14 2004/02/17 02:02:03 rob Exp $ - -=============================================================================== - -Version 0.15.1 (beta) - - * Updated to autoconf 2.59, automake 1.8.2, libtool 1.5.2. - - * Replaced Layer III IMDCT routine with one based on a faster algorithm, - improving both speed and accuracy. - - * Improved portability of the Huffman table initialization. - - * Fixed a problem that could result in an assertion failure in layer3.c - due to an invalid Layer III free format bitrate. - - * Improved the robustness of Layer II bitrate/mode combinations, and added - a new MAD_ERROR_BADMODE error enum. The allowability of low-bitrate - stereo streams is influenced by the --enable-strict-iso option to - `configure'. - -Version 0.15.0 (beta) - - * Updated to autoconf 2.57, automake 1.7.5, libtool 1.4.3. - - * Added new mad_f_div() API routine. - - * Added a 64th entry to the Layer I/Layer II scalefactor table, for better - compatibility with existing streams. The --enable-strict-iso option to - `configure' can be used to disable use of this entry. - - * Modified the header decoding routine to allow the reserved emphasis - value, for better compatibility with existing streams. The - --enable-strict-iso option to `configure' can be used to restore the - previous behavior of reporting this value as an error. - - * Added new MAD_EMPHASIS_RESERVED enumeration constant. - - * Fixed a bug in the ARM version of mad_f_scale64() discovered by Andre - McCurdy. - - * Rewrote PowerPC assembly for minor gains. - - * Modified mad_timer_fraction() to avoid the possibility of division by - zero when 0 is passed as the second argument. - - * Fixed a non-fatal problem caused by attempting to designate ancillary - bits in Layer III after a decoding error. - - * Changed to build a shared library by default. - - * Changed to use native Cygwin build by default; give --host=mingw32 to - `configure' to use MinGW (and avoid a dependency on the Cygwin DLL). - -Version 0.14.2 (beta) - - * Changed Cygwin builds to use MinGW; resulting Win32 executables no - longer have a dependency on Cygwin DLLs. - - * Added a new mad_stream_errorstr() API function to libmad for retrieving - a string description of the current error condition. - -Version 0.14.1 (beta) - - * Updated config.guess and config.sub to latest upstream versions. - - * Enabled libtool versioning rather than release numbering. - - * Improved the documentation in minimad.c. - - * Several other small fixes. - -Version 0.14.0 (beta) - - * Added a 64-bit FPM negation operation to improve performance of subband - synthesis on some platforms. - - * Improved MSVC++ portability and added MSVC++ project files. - - * Added rounding to Layer III requantization for slightly better accuracy. - -Version 0.13.0 (beta) - - * Ancillary data is now properly extracted from Layer III streams. - - * Rewrote the Layer III joint stereo decoding routine to correct a major - MPEG-2 problem and a minor MPEG-1 problem decoding intensity stereo. - - * Eliminated the dependency on sign-extending right shifts for Layer I and - Layer II. - - * Renamed `private' field to `private_bits' for better C++ compatibility. - - * Gratuitously renamed `sfreq' field to `samplerate' and - MAD_ERROR_BADSAMPLEFREQ constant to MAD_ERROR_BADSAMPLERATE. - - * Added `samplerate' and `channels' fields to synth.pcm struct to allow - these to be different from the decoded frame, and for simpler access. - - * Added new mad_stream_options() and mad_decoder_options() API entries for - special runtime decoding options. - - * Added new MAD_OPTION_IGNORECRC and MAD_OPTION_HALFSAMPLERATE options. - - * Added new MAD_FLAG_FREEFORMAT indicator flag. - - * Fixed some bugs in the async decoder. - - * Added a new mad_timer_multiply() API routine. - - * Eliminated `+' from asm constraints under Intel for better compatibility - with some compilers. - - * Fixed a PIC-related problem in imdct_l_arm.S. - - * Eliminated a static variable to make libmad thread-safe. - -Version 0.12.5 (beta) - - * Modified Layer III requantization to occur during Huffman decoding for - significant performance gains. - - * Optimized short block IMDCT by eliminating redundant calculations. - - * Made several other Layer III performance improvements; added - ASO_INTERLEAVE1, ASO_INTERLEAVE2, and ASO_ZEROCHECK - architecture-specific options for best performance on various - architectures. - - * Optimized synthesis DCT to store result values as soon as they are - calculated. - -Version 0.12.4 (beta) - - * New PowerPC fixed-point assembly courtesy of David Blythe. - - * Reorganized fixed-point assembly routines for easier maintenance and - better performance. - - * Improved performance of subband synthesis through better indexing and - fewer local variables. - - * Added alias reduction for the lower two subbands of mixed short blocks, - per a report of ambiguity with ISO/IEC 11172-3 and for uniformity with - most other implementations. Also improved alias reduction performance - using multiply/accumulate. - - * Added --enable-strict-iso option to `configure' to override best - accepted practices such as the alias reduction for mixed short blocks. - - * Improved performance of Layer III IMDCT by using longer - multiply/accumulate runs where possible. - -Version 0.12.3 (beta) - - * Added MPEG 2.5 support. - - * Added preliminary support for parameterizing the binary point position - in the fixed-point representation. - - * Added multiply/accumulate optimization to the Layer III IMDCT for long - blocks. - - * Fixed a bug in the handling of Layer III mixed_block_flag. - - * Fixed a configure problem when multiple -O CFLAGS are present. - -Version 0.12.2 (beta) - - * Rearranged the synthesis polyphase filterbank memory vector for better - locality of reference, and rewrote mad_synth_frame() to accommodate, - resulting in improved performance. - - * Discovered a combination of compiler optimization flags that further - improve performance. - - * Changed some array references in layer3.c to pointer derefs. - -Version 0.12.1 (beta) - - * Resolved the intensity + MS joint stereo issue (a simple bug). - OPT_ISKLUGE is no longer considered to be a kluge. - - * Fixed another, hopefully last main_data memory bug. - - * Split part of struct mad_frame into struct mad_header for convenience - and size. - -Version 0.12.0 (alpha) - - * Changed the build environment to use automake and libtool. A libmad - shared library can now be built using the --enable-shared option to - `configure'. - - * Added another callback to MAD's high-level decoder API after the frame - header has been read but before the frame's audio data is decoded. - - * Streamlined header processing so that mad_frame_decode() can be called - with or without having already called mad_frame_header(). - - * Fixed some other header reading miscellany, including CRC handling and - free bitrate detection, and frame length verification with free - bitrates. - - * Fixed a problem with Layer III free bitrates > 320 kbps. The main_data - buffer size should now be large enough to handle any size frame, by - virtue of the maximum possible part2_3_length. - - * Further developed the async API; arbitrary messages can now be passed to - the subsidiary decoding process. - - * Streamlined timer.c and extended its interface. It now has support for - video frame/field lengths, including output support for drop-frame - encoding. - - * Replaced many constant integer preprocessor defines with enums. - -Version 0.11.4 (beta) - - * Fixed free format bitrate discovery. - - * Changed the timer implementation and extended its interface. - - * Integrated Nicolas Pitre's patch for pre-shifting at compile-time and - for better multiply/accumulate code output. - - * Applied Simon Burge's patch to imdct_l_arm.S for a.out compatibility. - - * Added -mtune=strongarm for all ARM targets. - -Version 0.11.3 (beta) - - * Added new --enable-speed and --enable-accuracy options for `configure' - to automatically select appropriate SSO/ASO options, et al. - - * Modified subband synthesis to use multiply/accumulate optimization (if - available) for better speed and/or accuracy. - - * Incorporated Andre McCurdy's changes for further rounding optimizations - in the rest of his code. - -Version 0.11.2 (beta) - - * Incorporated Nicolas Pitre's ARM assembly and parameterized scaling - changes. - - * Incorporated Andre McCurdy's ARM assembly optimization (used only if - --enable-aso is given to `configure' to enable architecture-specific - optimizations.) - - * Reduced FPM_INTEL assembly to two instructions. - - * Fixed accuracy problems with certain FPM modes in synth.c. - - * Improved the accuracy of FPM_APPROX. - - * Improved the accuracy of SSO. - - * Improved sync discovery by checking for a sync word in the following - frame. - - * Minor code clean-up. - - * Added experimental rules for generating a libmad.so shared library. - -Version 0.11.1 (beta) - - * Moved libmad code into a separate directory. - - * Changed SSO to be disabled by default, as output accuracy is deemed to - be more important than speed in the general case. - - * Fixed a bug in Layer III sanity checking that could cause a crash on - certain random data input. - - * Extended the Layer III requantization table from 8191 to 8206 as some - encoders are known to use these values, even though ISO/IEC 11172-3 - suggests the maximum should be 8191. - -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. - - * 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. - -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. - - * 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. - -=============================================================================== - |