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212 lines
5.6 KiB
C
212 lines
5.6 KiB
C
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#ifndef MPG123_H_OPTIMIZE
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#define MPG123_H_OPTIMIZE
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/*
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optimize: get a grip on the different optimizations
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copyright 2007 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Thomas Orgis, taking from mpg123.[hc]
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for building mpg123 with one optimization only, you have to choose exclusively between
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OPT_GENERIC (generic C code for everyone)
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OPT_GENERIC_DITHER (same with dithering for 1to1)
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OPT_I386 (Intel i386)
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OPT_I486 (Somewhat special code for i486; does not work together with others.)
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OPT_I586 (Intel Pentium)
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OPT_I586_DITHER (Intel Pentium with dithering/noise shaping for enhanced quality)
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OPT_MMX (Intel Pentium and compatibles with MMX, fast, but not the best accuracy)
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OPT_3DNOW (AMD 3DNow!, K6-2/3, Athlon, compatibles...)
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OPT_3DNOWEXT (AMD 3DNow! extended, generally Athlon, compatibles...)
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OPT_ALTIVEC (Motorola/IBM PPC with AltiVec under MacOSX)
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OPT_X86_64 (x86-64 / AMD64 / Intel 64)
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or you define OPT_MULTI and give a combination which makes sense (do not include i486, do not mix altivec and x86).
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I still have to examine the dynamics of this here together with REAL_IS_FIXED.
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Basic point is: Don't use REAL_IS_FIXED with something else than generic or i386.
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Also, one should minimize code size by really ensuring that only functions that are really needed are included.
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Currently, all generic functions will be always there (to be safe for fallbacks for advanced decoders).
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Strictly, at least the synth_1to1 should not be necessary for single-decoder mode.
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*/
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/* Runtime optimization interface now here: */
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enum optdec
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{ /* autodec needs to be =0 and the first, nodec needs to be the last -- for loops! */
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autodec=0, generic, generic_dither, idrei,
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ivier, ifuenf, ifuenf_dither, mmx,
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dreidnow, dreidnowext, altivec, sse, x86_64, arm,
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nodec
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};
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enum optcla { nocla=0, normal, mmxsse };
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/* - Set up the table of synth functions for current decoder choice. */
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int frame_cpu_opt(mpg123_handle *fr, const char* cpu);
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/* - Choose, from the synth table, the synth functions to use for current output format/rate. */
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int set_synth_functions(mpg123_handle *fr);
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/* - Parse decoder name and return numerical code. */
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enum optdec dectype(const char* decoder);
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/* - Return the default decoder type. */
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enum optdec defdec(void);
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/* - Return the class of a decoder type (mmxsse or normal). */
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enum optcla decclass(const enum optdec);
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/* Now comes a whole lot of definitions, for multi decoder mode and single decoder mode.
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Because of the latter, it may look redundant at times. */
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/* this is included in mpg123.h, which includes config.h */
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#ifdef CCALIGN
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#define ALIGNED(a) __attribute__((aligned(a)))
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#else
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#define ALIGNED(a)
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#endif
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/* Safety catch for invalid decoder choice. */
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#ifdef REAL_IS_FIXED
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#if (defined OPT_I486) || (defined OPT_I586) || (defined OPT_I586_DITHER) \
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|| (defined OPT_MMX) || (defined OPT_SSE) || (defined_OPT_ALTIVEC) \
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|| (defined OPT_3DNOW) || (defined OPT_3DNOWEXT) || (defined OPT_X86_64) || (defined OPT_GENERIC_DITHER)
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#error "Bad decoder choice together with fixed point math!"
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#endif
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#endif
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#if (defined NO_LAYER1 && defined NO_LAYER2)
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#define NO_LAYER12
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#endif
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#ifdef OPT_GENERIC
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#ifndef OPT_MULTI
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# define defopt generic
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#endif
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#endif
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#ifdef OPT_GENERIC_DITHER
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#define OPT_DITHER
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#ifndef OPT_MULTI
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# define defopt generic_dither
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#endif
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#endif
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/* i486 is special... always alone! */
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#ifdef OPT_I486
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#define OPT_X86
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#define defopt ivier
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#ifdef OPT_MULTI
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#error "i486 can only work alone!"
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#endif
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#define FIR_BUFFER_SIZE 128
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#define FIR_SIZE 16
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#endif
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#ifdef OPT_I386
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt idrei
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#endif
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#endif
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#ifdef OPT_I586
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt ifuenf
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#endif
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#endif
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#ifdef OPT_I586_DITHER
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#define OPT_X86
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#define OPT_DITHER
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#ifndef OPT_MULTI
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# define defopt ifuenf_dither
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#endif
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#endif
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/* We still have some special code around MMX tables. */
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#ifdef OPT_MMX
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#define OPT_MMXORSSE
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt mmx
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#endif
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#endif
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#ifdef OPT_SSE
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#define OPT_MMXORSSE
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#define OPT_MPLAYER
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt sse
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#endif
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#endif
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#ifdef OPT_3DNOWEXT
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#define OPT_MMXORSSE
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#define OPT_MPLAYER
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt dreidnowext
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# define opt_dct36(fr) dct36_3dnowext
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#endif
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#endif
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#ifdef OPT_MPLAYER
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extern const int costab_mmxsse[];
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#endif
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/* 3dnow used to use synth_1to1_i586 for mono / 8bit conversion - was that intentional? */
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/* I'm trying to skip the pentium code here ... until I see that that is indeed a bad idea */
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#ifdef OPT_3DNOW
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#define OPT_X86
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#ifndef OPT_MULTI
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# define defopt dreidnow
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# define opt_dct36(fr) dct36_3dnow
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#endif
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#endif
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#ifdef OPT_ALTIVEC
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#ifndef OPT_MULTI
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# define defopt altivec
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#endif
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#endif
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#ifdef OPT_X86_64
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#define OPT_MMXORSSE
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#ifndef OPT_MULTI
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# define defopt x86_64
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#endif
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#endif
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#ifdef OPT_ARM
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#ifndef OPT_MULTI
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# define defopt arm
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#endif
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#endif
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/* used for multi opt mode and the single 3dnow mode to have the old 3dnow test flag still working */
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void check_decoders(void);
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/*
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Now come two blocks of standard definitions for multi-decoder mode and single-decoder mode.
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Most stuff is so automatic that it's indeed generated by some inline shell script.
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Remember to use these scripts when possible, instead of direct repetitive hacking.
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*/
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#ifdef OPT_MULTI
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# define defopt nodec
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# if (defined OPT_3DNOW || defined OPT_3DNOWEXT)
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# define opt_dct36(fr) ((fr)->cpu_opts.dct36)
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# endif
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#endif /* OPT_MULTI else */
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# ifndef opt_dct36
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# define opt_dct36(fr) dct36
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# endif
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#endif /* MPG123_H_OPTIMIZE */
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