From 22b48b85b647390dd370cd0a1f41f371f4c010f1 Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Mon, 27 Mar 2006 12:51:19 +0000 Subject: altivec support for snow Originally committed as revision 5228 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/snow.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'libavcodec/snow.h') diff --git a/libavcodec/snow.h b/libavcodec/snow.h index 976901edbb..6505c5e960 100644 --- a/libavcodec/snow.h +++ b/libavcodec/snow.h @@ -120,4 +120,43 @@ extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, D extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width); extern void ff_snow_inner_add_yblock(uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8); + +/* C bits used by mmx/sse2/altivec */ + +static always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){ + (*i) = (width) - 2; + + if (width & 1){ + low[(*i)+1] = low[((*i)+1)>>1]; + (*i)--; + } +} + +static always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){ + for (; (*i)>=0; (*i)-=2){ + low[(*i)+1] = high[(*i)>>1]; + low[*i] = low[(*i)>>1]; + } +} + +static always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){ + for(; i> shift); + } + + if((width^lift_high)&1){ + dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift); + } +} + +static always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){ + for(; i> W_BS); + } + + if(width&1){ + dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS); + } +} + #endif -- cgit v1.2.3