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| author | Michael Niedermayer <michaelni@gmx.at> | 2002-09-02 16:56:29 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2002-09-02 16:56:29 +0000 |
| commit | 1a684b3d53c19756d76872ba745e00209548b0db (patch) | |
| tree | 6875a7ad431ecdcee828b140826f0700da8d8378 /libavcodec | |
| parent | be7109c12b95b6ab2490b9e035db9143b43f8d73 (diff) | |
| download | ffmpeg-1a684b3d53c19756d76872ba745e00209548b0db.tar.gz | |
fixing encoding at high QPs (was broken after the dct accuracy increase due to too small inverse table)
Originally committed as revision 901 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/i386/mpegvideo_mmx_template.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/i386/mpegvideo_mmx_template.c b/libavcodec/i386/mpegvideo_mmx_template.c index 185baaa420..27229ba299 100644 --- a/libavcodec/i386/mpegvideo_mmx_template.c +++ b/libavcodec/i386/mpegvideo_mmx_template.c @@ -46,9 +46,9 @@ static int RENAME(dct_quantize)(MpegEncContext *s, if (s->mb_intra) { int dummy; if (n < 4) - q = s->y_dc_scale<<3; + q = s->y_dc_scale; else - q = s->c_dc_scale<<3; + q = s->c_dc_scale; /* note: block[0] is assumed to be positive */ if (!s->h263_aic) { #if 1 @@ -56,7 +56,7 @@ static int RENAME(dct_quantize)(MpegEncContext *s, "xorl %%edx, %%edx \n\t" "mul %%ecx \n\t" : "=d" (level), "=a"(dummy) - : "a" (block[0] + (q >> 1)), "c" (inverse[q]) + : "a" ((block[0]>>2) + q), "c" (inverse[q<<1]) ); #else asm volatile ( @@ -64,13 +64,13 @@ static int RENAME(dct_quantize)(MpegEncContext *s, "divw %%cx \n\t" "movzwl %%ax, %%eax \n\t" : "=a" (level) - : "a" (block[0] + (q >> 1)), "c" (q) + : "a" ((block[0]>>2) + q), "c" (q<<1) : "%edx" ); #endif } else /* For AIC we skip quant/dequant of INTRADC */ - level = block[0]>>3; + level = (block[0] + 4)>>3; block[0]=0; //avoid fake overflow // temp_block[0] = (block[0] + (q >> 1)) / q; |