Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

Altivec version of h264_(h|v)_loop_filter_luma

Browse Source 
patch by Graham Booker % perian A cod3r P com% with some minor fixes by me.
historic of the patch: http://trac.perian.org/ticket/113
Original thread:
Date: May 11, 2007 9:45 PM
Subject: [FFmpeg-devel] [PATCH] Altivec version of-altivec h264_h-v_loop_filter_luma

Originally committed as revision 9264 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Graham Booker 18 years ago committed by Guillaume Poirier
parent 12807c8d87
commit f057cc0399
2 changed files with 279 additions and 0 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 11
      libavcodec/ppc/dsputil_altivec.h
  2. 268
      libavcodec/ppc/h264_altivec.c

11
libavcodec/ppc/dsputil_altivec.h
Unescape View File

@ -101,6 +101,17 @@ do { \
h = vec_mergel (D2, H2); \
} while (0)
/** \brief loads unaligned vector \a *src with offset \a offset
and returns it */
static inline vector unsigned char unaligned_load(int offset, uint8_t *src)
{
register vector unsigned char first = vec_ld(offset, src);
register vector unsigned char second = vec_ld(offset+15, src);
register vector unsigned char mask = vec_lvsl(offset, src);
return vec_perm(first, second, mask);
}
#endif /* HAVE_ALTIVEC */
#endif /* _DSPUTIL_ALTIVEC_ */

268
libavcodec/ppc/h264_altivec.c
Unescape View File

@ -600,6 +600,272 @@ void ff_h264_idct8_add_altivec( uint8_t *dst, DCTELEM *dct, int stride ) {
ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
}
#define transpose4x16(r0, r1, r2, r3) { \
register vector unsigned char r4; \
register vector unsigned char r5; \
register vector unsigned char r6; \
register vector unsigned char r7; \
\
r4 = vec_mergeh(r0, r2); /*0, 2 set 0*/ \
r5 = vec_mergel(r0, r2); /*0, 2 set 1*/ \
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 vector unsigned char r0,
register vector unsigned char r1, register vector unsigned char r2,
register vector unsigned char 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 vector unsigned char r0 = unaligned_load(0, src);\
register vector unsigned char r1 = unaligned_load( src_stride, src);\
register vector unsigned char r2 = unaligned_load(2* src_stride, src);\
register vector unsigned char r3 = unaligned_load(3* src_stride, src);\
register vector unsigned char r4 = unaligned_load(4* src_stride, src);\
register vector unsigned char r5 = unaligned_load(5* src_stride, src);\
register vector unsigned char r6 = unaligned_load(6* src_stride, src);\
register vector unsigned char r7 = unaligned_load(7* src_stride, src);\
register vector unsigned char r14 = unaligned_load(14*src_stride, src);\
register vector unsigned char 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 vector unsigned char diff_lt_altivec ( register vector unsigned char x,
register vector unsigned char y,
register vector unsigned char a) {
register vector unsigned char diff = vec_subs(x, y);
register vector unsigned char diffneg = vec_subs(y, x);
register vector unsigned char o = vec_or(diff, diffneg); /* |x-y| */
o = vec_cmplt(o, a);
return o;
}
static inline vector unsigned char h264_deblock_mask ( register vector unsigned char p0,
register vector unsigned char p1,
register vector unsigned char q0,
register vector unsigned char q1,
register vector unsigned char alpha,
register vector unsigned char beta) {
register vector unsigned char mask;
register vector unsigned char 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: p1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
#define h264_deblock_q1(p0, p1, p2, q0, tc0) { \
\
register vector unsigned char average = vec_avg(p0, q0); \
register vector unsigned char temp; \
register vector unsigned char uncliped; \
register vector unsigned char ones; \
register vector unsigned char max; \
register vector unsigned char min; \
\
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); \
p1 = vec_max(min, uncliped); \
p1 = vec_min(max, p1); \
}
#define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) { \
\
const vec_u8_t A0v = (vec_u8_t) AVV(0xA0,0xA0,0xA0,0xA0,0xA0,0xA0,0xA0,0xA0, \
0xA0,0xA0,0xA0,0xA0,0xA0,0xA0,0xA0,0xA0); \
\
register vector unsigned char pq0bit = vec_xor(p0,q0); \
register vector unsigned char temp; \
register vector unsigned char q1minus; \
register vector unsigned char p0minus; \
register vector unsigned char stage1; \
register vector unsigned char stage2; \
register vector unsigned char vec160; \
register vector unsigned char delta; \
register vector unsigned char deltaneg; \
\
temp = vec_cmpeq(p0, p0); \
q1minus = vec_xor(temp, 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_xor(temp, 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 vector unsigned char alphavec; \
register vector unsigned char betavec; \
register vector unsigned char mask; \
register vector unsigned char p1mask; \
register vector unsigned char q1mask; \
register vector char tc0vec; \
register vector unsigned char finaltc0; \
register vector unsigned char tc0masked; \
\
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, temp); \
tc0vec = vec_mergeh(tc0vec, tc0vec); \
tc0vec = vec_mergeh(tc0vec, tc0vec); \
mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_u8(-1))); /* if tc0[i] >= 0 */ \
finaltc0 = vec_and(tc0vec, mask); /*tc = tc0[i]*/ \
\
p1mask = diff_lt_altivec(p2, p0, betavec); \
p1mask = vec_and(p1mask, mask); /* if( |p2 - p0| < beta) */ \
tc0masked = vec_and(p1mask, tc0vec); \
finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \
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, tc0vec); \
finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \
h264_deblock_q1(p0, q1, q2, q0, tc0masked); \
/*end if*/ \
\
h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \
}
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 vector unsigned char p2 = vec_ld(-3*stride, pix);
register vector unsigned char p1 = vec_ld(-2*stride, pix);
register vector unsigned char p0 = vec_ld(-1*stride, pix);
register vector unsigned char q0 = vec_ld(0, pix);
register vector unsigned char q1 = vec_ld(stride, pix);
register vector unsigned char 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 vector unsigned char 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) {
#ifdef HAVE_ALTIVEC
@ -609,6 +875,8 @@ void dsputil_h264_init_ppc(DSPContext* c, AVCodecContext *avctx) {
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; \

Write Preview
Loading…
Cancel
Save