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Utility functions (CRC calc & float->int converters)

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[imported from MPlayer, based on a52dec's libao]

Originally committed as revision 1780 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Arpi
2003-04-16 20:03:07 +00:00
parent 6814a25c67
commit 1a7c3c8562
7 changed files with 858 additions and 0 deletions
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45
libavcodec/liba52/resample.c Normal file
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// a52_resample_init should find the requested converter (from type flags ->
// given number of channels) and set up some function pointers...
// a52_resample() should do the conversion.
#include <inttypes.h>
#include <stdio.h>
#include "a52.h"
#include "mm_accel.h"
#include "config.h"
#include "../libpostproc/mangle.h"
int (* a52_resample) (float * _f, int16_t * s16)=NULL;
#include "resample_c.c"
#ifdef ARCH_X86
#include "resample_mmx.c"
#endif
void* a52_resample_init(uint32_t mm_accel,int flags,int chans){
void* tmp;
#ifdef ARCH_X86
if(mm_accel&MM_ACCEL_X86_MMX){
tmp=a52_resample_MMX(flags,chans);
if(tmp){
if(a52_resample==NULL) fprintf(stderr, "Using MMX optimized resampler\n");
a52_resample=tmp;
return tmp;
}
}
#endif
tmp=a52_resample_C(flags,chans);
if(tmp){
if(a52_resample==NULL) fprintf(stderr, "No accelerated resampler found\n");
a52_resample=tmp;
return tmp;
}
fprintf(stderr, "Unimplemented resampler for mode 0x%X -> %d channels conversion - Contact MPlayer developers!\n", flags, chans);
return NULL;
}