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view decoders/libmpg123/optimize.c @ 562:7e08477b0fc1

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MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 30 Jan 2009 02:44:47 -0500
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/*
	optimize: get a grip on the different optimizations

	copyright 2006 by the mpg123 project - free software under the terms of the LGPL 2.1
	see COPYING and AUTHORS files in distribution or http://mpg123.org
	initially written by Thomas Orgis, inspired by 3DNow stuff in mpg123.[hc]

	Currently, this file contains the struct and function to choose an optimization variant and works only when OPT_MULTI is in effect.
*/

#include "mpg123lib_intern.h" /* includes optimize.h */
#ifdef OPT_MULTI

#include "getcpuflags.h"
struct cpuflags cpu_flags;

/* same number of entries as full list, but empty at beginning */
static char *mpg123_supported_decoder_list[] =
{
	#ifdef OPT_3DNOWEXT
	NULL,
	#endif
	#ifdef OPT_SSE
	NULL,
	#endif
	#ifdef OPT_3DNOW
	NULL,
	#endif
	#ifdef OPT_MMX
	NULL,
	#endif
	#ifdef OPT_I586
	NULL,
	#endif
	#ifdef OPT_I586_DITHER
	NULL,
	#endif
	#ifdef OPT_I486
	NULL,
	#endif
	#ifdef OPT_I386
	NULL,
	#endif
	#ifdef OPT_ALTIVEC
	NULL,
	#endif
	NULL, /* generic */
	NULL
};
#endif

static char *mpg123_decoder_list[] =
{
	#ifdef OPT_3DNOWEXT
	"3DNowExt",
	#endif
	#ifdef OPT_SSE
	"SSE",
	#endif
	#ifdef OPT_3DNOW
	"3DNow",
	#endif
	#ifdef OPT_MMX
	"MMX",
	#endif
	#ifdef OPT_I586
	"i586",
	#endif
	#ifdef OPT_I586_DITHER
	"i586_dither",
	#endif
	#ifdef OPT_I486
	"i486",
	#endif
	#ifdef OPT_I386
	"i386",
	#endif
	#ifdef OPT_ALTIVEC
	"AltiVec",
	#endif
	#ifdef OPT_GENERIC
	"generic",
	#endif
	NULL
};

void check_decoders(void )
{
#ifndef OPT_MULTI
	return;
#else
	char **d = mpg123_supported_decoder_list;
#ifdef OPT_X86
	getcpuflags(&cpu_flags);
	if(cpu_i586(cpu_flags))
	{
		/* not yet: if(cpu_sse2(cpu_flags)) printf(" SSE2");
		if(cpu_sse3(cpu_flags)) printf(" SSE3"); */
#ifdef OPT_3DNOWEXT
		if(cpu_3dnowext(cpu_flags)) *(d++) = "3DNowExt";
#endif
#ifdef OPT_SSE
		if(cpu_sse(cpu_flags)) *(d++) = "SSE";
#endif
#ifdef OPT_3DNOW
		if(cpu_3dnow(cpu_flags)) *(d++) = "3DNow";
#endif
#ifdef OPT_MMX
		if(cpu_mmx(cpu_flags)) *(d++) = "MMX";
#endif
#ifdef OPT_I586
		*(d++) = "i586";
#endif
#ifdef OPT_I586_DITHER
		*(d++) = "i586_dither";
#endif
	}
#endif
/* just assume that the i486 built is run on a i486 cpu... */
#ifdef OPT_I486
	*(d++) = "i486";
#endif
#ifdef OPT_ALTIVEC
	*(d++) = "AltiVec";
#endif
/* every supported x86 can do i386, any cpu can do generic */
#ifdef OPT_I386
	*(d++) = "i386";
#endif
#ifdef OPT_GENERIC
	*(d++) = "generic";
#endif
#endif /* ndef OPT_MULTI */
}

char attribute_align_arg **mpg123_decoders(){ return mpg123_decoder_list; }
char attribute_align_arg **mpg123_supported_decoders()
{
#ifdef OPT_MULTI
	return mpg123_supported_decoder_list;
#else
	return mpg123_decoder_list;
#endif
}