📄 h264_altivec.c
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r6 = vec_mergeh(r1, r3); /*1, 3 set 0*/ \
r7 = vec_mergel(r1, r3); /*1, 3 set 1*/ \
\
r0 = vec_mergeh(r4, r6); /*all set 0*/ \
r1 = vec_mergel(r4, r6); /*all set 1*/ \
r2 = vec_mergeh(r5, r7); /*all set 2*/ \
r3 = vec_mergel(r5, r7); /*all set 3*/ \
}
static inline void write16x4(uint8_t *dst, int dst_stride,
register vec_u8_t r0, register vec_u8_t r1,
register vec_u8_t r2, register vec_u8_t r3) {
DECLARE_ALIGNED_16(unsigned char, result[64]);
uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst;
int int_dst_stride = dst_stride/4;
vec_st(r0, 0, result);
vec_st(r1, 16, result);
vec_st(r2, 32, result);
vec_st(r3, 48, result);
/* FIXME: there has to be a better way!!!! */
*dst_int = *src_int;
*(dst_int+ int_dst_stride) = *(src_int + 1);
*(dst_int+ 2*int_dst_stride) = *(src_int + 2);
*(dst_int+ 3*int_dst_stride) = *(src_int + 3);
*(dst_int+ 4*int_dst_stride) = *(src_int + 4);
*(dst_int+ 5*int_dst_stride) = *(src_int + 5);
*(dst_int+ 6*int_dst_stride) = *(src_int + 6);
*(dst_int+ 7*int_dst_stride) = *(src_int + 7);
*(dst_int+ 8*int_dst_stride) = *(src_int + 8);
*(dst_int+ 9*int_dst_stride) = *(src_int + 9);
*(dst_int+10*int_dst_stride) = *(src_int + 10);
*(dst_int+11*int_dst_stride) = *(src_int + 11);
*(dst_int+12*int_dst_stride) = *(src_int + 12);
*(dst_int+13*int_dst_stride) = *(src_int + 13);
*(dst_int+14*int_dst_stride) = *(src_int + 14);
*(dst_int+15*int_dst_stride) = *(src_int + 15);
}
/** \brief performs a 6x16 transpose of data in src, and stores it to dst
\todo FIXME: see if we can't spare some vec_lvsl() by them factorizing
out of unaligned_load() */
#define readAndTranspose16x6(src, src_stride, r8, r9, r10, r11, r12, r13) {\
register vec_u8_t r0 = unaligned_load(0, src); \
register vec_u8_t r1 = unaligned_load( src_stride, src); \
register vec_u8_t r2 = unaligned_load(2* src_stride, src); \
register vec_u8_t r3 = unaligned_load(3* src_stride, src); \
register vec_u8_t r4 = unaligned_load(4* src_stride, src); \
register vec_u8_t r5 = unaligned_load(5* src_stride, src); \
register vec_u8_t r6 = unaligned_load(6* src_stride, src); \
register vec_u8_t r7 = unaligned_load(7* src_stride, src); \
register vec_u8_t r14 = unaligned_load(14*src_stride, src); \
register vec_u8_t r15 = unaligned_load(15*src_stride, src); \
\
r8 = unaligned_load( 8*src_stride, src); \
r9 = unaligned_load( 9*src_stride, src); \
r10 = unaligned_load(10*src_stride, src); \
r11 = unaligned_load(11*src_stride, src); \
r12 = unaligned_load(12*src_stride, src); \
r13 = unaligned_load(13*src_stride, src); \
\
/*Merge first pairs*/ \
r0 = vec_mergeh(r0, r8); /*0, 8*/ \
r1 = vec_mergeh(r1, r9); /*1, 9*/ \
r2 = vec_mergeh(r2, r10); /*2,10*/ \
r3 = vec_mergeh(r3, r11); /*3,11*/ \
r4 = vec_mergeh(r4, r12); /*4,12*/ \
r5 = vec_mergeh(r5, r13); /*5,13*/ \
r6 = vec_mergeh(r6, r14); /*6,14*/ \
r7 = vec_mergeh(r7, r15); /*7,15*/ \
\
/*Merge second pairs*/ \
r8 = vec_mergeh(r0, r4); /*0,4, 8,12 set 0*/ \
r9 = vec_mergel(r0, r4); /*0,4, 8,12 set 1*/ \
r10 = vec_mergeh(r1, r5); /*1,5, 9,13 set 0*/ \
r11 = vec_mergel(r1, r5); /*1,5, 9,13 set 1*/ \
r12 = vec_mergeh(r2, r6); /*2,6,10,14 set 0*/ \
r13 = vec_mergel(r2, r6); /*2,6,10,14 set 1*/ \
r14 = vec_mergeh(r3, r7); /*3,7,11,15 set 0*/ \
r15 = vec_mergel(r3, r7); /*3,7,11,15 set 1*/ \
\
/*Third merge*/ \
r0 = vec_mergeh(r8, r12); /*0,2,4,6,8,10,12,14 set 0*/ \
r1 = vec_mergel(r8, r12); /*0,2,4,6,8,10,12,14 set 1*/ \
r2 = vec_mergeh(r9, r13); /*0,2,4,6,8,10,12,14 set 2*/ \
r4 = vec_mergeh(r10, r14); /*1,3,5,7,9,11,13,15 set 0*/ \
r5 = vec_mergel(r10, r14); /*1,3,5,7,9,11,13,15 set 1*/ \
r6 = vec_mergeh(r11, r15); /*1,3,5,7,9,11,13,15 set 2*/ \
/* Don't need to compute 3 and 7*/ \
\
/*Final merge*/ \
r8 = vec_mergeh(r0, r4); /*all set 0*/ \
r9 = vec_mergel(r0, r4); /*all set 1*/ \
r10 = vec_mergeh(r1, r5); /*all set 2*/ \
r11 = vec_mergel(r1, r5); /*all set 3*/ \
r12 = vec_mergeh(r2, r6); /*all set 4*/ \
r13 = vec_mergel(r2, r6); /*all set 5*/ \
/* Don't need to compute 14 and 15*/ \
\
}
// out: o = |x-y| < a
static inline vec_u8_t diff_lt_altivec ( register vec_u8_t x,
register vec_u8_t y,
register vec_u8_t a) {
register vec_u8_t diff = vec_subs(x, y);
register vec_u8_t diffneg = vec_subs(y, x);
register vec_u8_t o = vec_or(diff, diffneg); /* |x-y| */
o = (vec_u8_t)vec_cmplt(o, a);
return o;
}
static inline vec_u8_t h264_deblock_mask ( register vec_u8_t p0,
register vec_u8_t p1,
register vec_u8_t q0,
register vec_u8_t q1,
register vec_u8_t alpha,
register vec_u8_t beta) {
register vec_u8_t mask;
register vec_u8_t tempmask;
mask = diff_lt_altivec(p0, q0, alpha);
tempmask = diff_lt_altivec(p1, p0, beta);
mask = vec_and(mask, tempmask);
tempmask = diff_lt_altivec(q1, q0, beta);
mask = vec_and(mask, tempmask);
return mask;
}
// out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
static inline vec_u8_t h264_deblock_q1(register vec_u8_t p0,
register vec_u8_t p1,
register vec_u8_t p2,
register vec_u8_t q0,
register vec_u8_t tc0) {
register vec_u8_t average = vec_avg(p0, q0);
register vec_u8_t temp;
register vec_u8_t uncliped;
register vec_u8_t ones;
register vec_u8_t max;
register vec_u8_t min;
register vec_u8_t newp1;
temp = vec_xor(average, p2);
average = vec_avg(average, p2); /*avg(p2, avg(p0, q0)) */
ones = vec_splat_u8(1);
temp = vec_and(temp, ones); /*(p2^avg(p0, q0)) & 1 */
uncliped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */
max = vec_adds(p1, tc0);
min = vec_subs(p1, tc0);
newp1 = vec_max(min, uncliped);
newp1 = vec_min(max, newp1);
return newp1;
}
#define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) { \
\
const vec_u8_t A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4)); \
\
register vec_u8_t pq0bit = vec_xor(p0,q0); \
register vec_u8_t q1minus; \
register vec_u8_t p0minus; \
register vec_u8_t stage1; \
register vec_u8_t stage2; \
register vec_u8_t vec160; \
register vec_u8_t delta; \
register vec_u8_t deltaneg; \
\
q1minus = vec_nor(q1, q1); /* 255 - q1 */ \
stage1 = vec_avg(p1, q1minus); /* (p1 - q1 + 256)>>1 */ \
stage2 = vec_sr(stage1, vec_splat_u8(1)); /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */ \
p0minus = vec_nor(p0, p0); /* 255 - p0 */ \
stage1 = vec_avg(q0, p0minus); /* (q0 - p0 + 256)>>1 */ \
pq0bit = vec_and(pq0bit, vec_splat_u8(1)); \
stage2 = vec_avg(stage2, pq0bit); /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */ \
stage2 = vec_adds(stage2, stage1); /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */ \
vec160 = vec_ld(0, &A0v); \
deltaneg = vec_subs(vec160, stage2); /* -d */ \
delta = vec_subs(stage2, vec160); /* d */ \
deltaneg = vec_min(tc0masked, deltaneg); \
delta = vec_min(tc0masked, delta); \
p0 = vec_subs(p0, deltaneg); \
q0 = vec_subs(q0, delta); \
p0 = vec_adds(p0, delta); \
q0 = vec_adds(q0, deltaneg); \
}
#define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) { \
DECLARE_ALIGNED_16(unsigned char, temp[16]); \
register vec_u8_t alphavec; \
register vec_u8_t betavec; \
register vec_u8_t mask; \
register vec_u8_t p1mask; \
register vec_u8_t q1mask; \
register vector signed char tc0vec; \
register vec_u8_t finaltc0; \
register vec_u8_t tc0masked; \
register vec_u8_t newp1; \
register vec_u8_t newq1; \
\
temp[0] = alpha; \
temp[1] = beta; \
alphavec = vec_ld(0, temp); \
betavec = vec_splat(alphavec, 0x1); \
alphavec = vec_splat(alphavec, 0x0); \
mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */ \
\
*((int *)temp) = *((int *)tc0); \
tc0vec = vec_ld(0, (signed char*)temp); \
tc0vec = vec_mergeh(tc0vec, tc0vec); \
tc0vec = vec_mergeh(tc0vec, tc0vec); \
mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1))); /* if tc0[i] >= 0 */ \
finaltc0 = vec_and((vec_u8_t)tc0vec, mask); /* tc = tc0 */ \
\
p1mask = diff_lt_altivec(p2, p0, betavec); \
p1mask = vec_and(p1mask, mask); /* if ( |p2 - p0| < beta) */ \
tc0masked = vec_and(p1mask, (vec_u8_t)tc0vec); \
finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \
newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked); \
/*end if*/ \
\
q1mask = diff_lt_altivec(q2, q0, betavec); \
q1mask = vec_and(q1mask, mask); /* if ( |q2 - q0| < beta ) */\
tc0masked = vec_and(q1mask, (vec_u8_t)tc0vec); \
finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \
newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked); \
/*end if*/ \
\
h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \
p1 = newp1; \
q1 = newq1; \
}
static void h264_v_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0) {
register vec_u8_t p2 = vec_ld(-3*stride, pix);
register vec_u8_t p1 = vec_ld(-2*stride, pix);
register vec_u8_t p0 = vec_ld(-1*stride, pix);
register vec_u8_t q0 = vec_ld(0, pix);
register vec_u8_t q1 = vec_ld(stride, pix);
register vec_u8_t q2 = vec_ld(2*stride, pix);
h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0);
vec_st(p1, -2*stride, pix);
vec_st(p0, -1*stride, pix);
vec_st(q0, 0, pix);
vec_st(q1, stride, pix);
}
}
static void h264_h_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
register vec_u8_t line0, line1, line2, line3, line4, line5;
if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0)
return;
readAndTranspose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5);
h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0);
transpose4x16(line1, line2, line3, line4);
write16x4(pix-2, stride, line1, line2, line3, line4);
}
void dsputil_h264_init_ppc(DSPContext* c, AVCodecContext *avctx) {
if (has_altivec()) {
c->put_h264_chroma_pixels_tab[0] = put_h264_chroma_mc8_altivec;
c->put_no_rnd_h264_chroma_pixels_tab[0] = put_no_rnd_h264_chroma_mc8_altivec;
c->avg_h264_chroma_pixels_tab[0] = avg_h264_chroma_mc8_altivec;
c->h264_idct_add = ff_h264_idct_add_altivec;
c->h264_idct8_add = ff_h264_idct8_add_altivec;
c->h264_v_loop_filter_luma= h264_v_loop_filter_luma_altivec;
c->h264_h_loop_filter_luma= h264_h_loop_filter_luma_altivec;
#define dspfunc(PFX, IDX, NUM) \
c->PFX ## _pixels_tab[IDX][ 0] = PFX ## NUM ## _mc00_altivec; \
c->PFX ## _pixels_tab[IDX][ 1] = PFX ## NUM ## _mc10_altivec; \
c->PFX ## _pixels_tab[IDX][ 2] = PFX ## NUM ## _mc20_altivec; \
c->PFX ## _pixels_tab[IDX][ 3] = PFX ## NUM ## _mc30_altivec; \
c->PFX ## _pixels_tab[IDX][ 4] = PFX ## NUM ## _mc01_altivec; \
c->PFX ## _pixels_tab[IDX][ 5] = PFX ## NUM ## _mc11_altivec; \
c->PFX ## _pixels_tab[IDX][ 6] = PFX ## NUM ## _mc21_altivec; \
c->PFX ## _pixels_tab[IDX][ 7] = PFX ## NUM ## _mc31_altivec; \
c->PFX ## _pixels_tab[IDX][ 8] = PFX ## NUM ## _mc02_altivec; \
c->PFX ## _pixels_tab[IDX][ 9] = PFX ## NUM ## _mc12_altivec; \
c->PFX ## _pixels_tab[IDX][10] = PFX ## NUM ## _mc22_altivec; \
c->PFX ## _pixels_tab[IDX][11] = PFX ## NUM ## _mc32_altivec; \
c->PFX ## _pixels_tab[IDX][12] = PFX ## NUM ## _mc03_altivec; \
c->PFX ## _pixels_tab[IDX][13] = PFX ## NUM ## _mc13_altivec; \
c->PFX ## _pixels_tab[IDX][14] = PFX ## NUM ## _mc23_altivec; \
c->PFX ## _pixels_tab[IDX][15] = PFX ## NUM ## _mc33_altivec
dspfunc(put_h264_qpel, 0, 16);
dspfunc(avg_h264_qpel, 0, 16);
#undef dspfunc
}
}
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