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add AltiVec implementation of biweight_h264_pixels(16|8)x(16|8|4)

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Patch by David Conrad %lessen42 A gmail P com%

Originally committed as revision 16443 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2009-01-05 23:15:14 +00:00 committed by Guillaume Poirier
parent c663cb0d4f
commit df7fb43569
1 changed files with 82 additions and 0 deletions
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82
libavcodec/ppc/h264_altivec.c
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@ -935,6 +935,82 @@ static void h264_h_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha,
write16x4(pix-2, stride, line1, line2, line3, line4);
}
static av_always_inline
void biweight_h264_WxH_altivec(uint8_t *dst, uint8_t *src, int stride, int log2_denom,
int weightd, int weights, int offset, int w, int h)
{
int y, dst_aligned, src_aligned;
vec_u8 vsrc, vdst;
vec_u16 vtemp, vlog2_denom, vweights, vweightd, voffset, v0, v1, v2, v3;
DECLARE_ALIGNED_16(int32_t, temp[4]);
LOAD_ZERO;
offset = ((offset + 1) | 1) << log2_denom;
temp[0] = log2_denom+1;
temp[1] = weights;
temp[2] = weightd;
temp[3] = offset;
vtemp = vec_ld(0, temp);
vlog2_denom = vec_splat(vtemp, 1);
vweights = vec_splat(vtemp, 3);
vweightd = vec_splat(vtemp, 5);
voffset = vec_splat(vtemp, 7);
dst_aligned = !((unsigned long)dst & 0xf);
src_aligned = !((unsigned long)src & 0xf);
for (y=0; y<h; y++) {
vdst = vec_ld(0, dst);
vsrc = vec_ld(0, src);
v0 = vec_mergeh(zero_u8v, vdst);
v1 = vec_mergel(zero_u8v, vdst);
v2 = vec_mergeh(zero_u8v, vsrc);
v3 = vec_mergel(zero_u8v, vsrc);
if (w == 8) {
if (src_aligned)
v3 = v2;
else
v2 = v3;
}
if (w == 16 || dst_aligned) {
v0 = vec_mladd(v0, vweightd, zero_u16v);
v2 = vec_mladd(v2, vweights, zero_u16v);
v0 = vec_adds(v0, voffset);
v0 = vec_adds(v0, v2);
v0 = vec_sra(v0, vlog2_denom);
}
if (w == 16 || !dst_aligned) {
v1 = vec_mladd(v1, vweightd, zero_u16v);
v3 = vec_mladd(v3, vweights, zero_u16v);
v1 = vec_adds(v1, voffset);
v1 = vec_adds(v1, v3);
v1 = vec_sra(v1, vlog2_denom);
}
vdst = vec_packsu(v0, v1);
vec_st(vdst, 0, dst);
dst += stride;
src += stride;
}
}
#define H264_WEIGHT(W,H) \
static void ff_biweight_h264_pixels ## W ## x ## H ## _altivec(uint8_t *dst, uint8_t *src, int stride, int log2_denom, int weightd, int weights, int offset){ \
biweight_h264_WxH_altivec(dst, src, stride, log2_denom, weightd, weights, offset, W, H); \
}
H264_WEIGHT(16,16)
H264_WEIGHT(16, 8)
H264_WEIGHT( 8,16)
H264_WEIGHT( 8, 8)
H264_WEIGHT( 8, 4)
void dsputil_h264_init_ppc(DSPContext* c, AVCodecContext *avctx) {
if (has_altivec()) {
@ -973,5 +1049,11 @@ void dsputil_h264_init_ppc(DSPContext* c, AVCodecContext *avctx) {
dspfunc(put_h264_qpel, 0, 16);
dspfunc(avg_h264_qpel, 0, 16);
#undef dspfunc
c->biweight_h264_pixels_tab[0] = ff_biweight_h264_pixels16x16_altivec;
c->biweight_h264_pixels_tab[1] = ff_biweight_h264_pixels16x8_altivec;
c->biweight_h264_pixels_tab[2] = ff_biweight_h264_pixels8x16_altivec;
c->biweight_h264_pixels_tab[3] = ff_biweight_h264_pixels8x8_altivec;
c->biweight_h264_pixels_tab[4] = ff_biweight_h264_pixels8x4_altivec;
}
}