apps/ffmpeg-rockchip
1
0
Fork 0
mirror of https://github.com/nyanmisaka/ffmpeg-rockchip.git synced 2025-10-25 09:51:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

3dnow2 implementation of imdct.

Browse Source 
6% faster vorbis and wma.

Originally committed as revision 5954 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt
2006-08-08 04:01:04 +00:00
parent 2c5ad5fd74
commit bcfa3e58ee
5 changed files with 93 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
libavcodec/fft.c
View File

@@ -54,6 +54,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
s->exptab[i].im = s1;
}
s->fft_calc = ff_fft_calc_c;
s->imdct_calc = ff_imdct_calc;
s->exptab1 = NULL;
/* compute constant table for HAVE_SSE version */
@@ -62,11 +63,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
int has_vectors = 0;
#if defined(HAVE_MMX)
#ifdef HAVE_MM3DNOW
has_vectors = mm_support() & (MM_3DNOW | MM_3DNOWEXT | MM_SSE | MM_SSE2);
#else
has_vectors = mm_support() & (MM_SSE | MM_SSE2);
#endif
#endif
#if defined(HAVE_ALTIVEC) && !defined(ALTIVEC_USE_REFERENCE_C_CODE)
has_vectors = mm_support() & MM_ALTIVEC;
@@ -98,6 +95,8 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
} while (nblocks != 0);
av_freep(&s->exptab);
#if defined(HAVE_MMX)
if (has_vectors & MM_3DNOWEXT)
s->imdct_calc = ff_imdct_calc_3dn2;
#ifdef HAVE_MM3DNOW
if (has_vectors & MM_3DNOWEXT)
/* 3DNowEx for Athlon(XP) */