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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / ppc / h264dsp.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2004 Romain Dolbeau <romain@dolbeau.org>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "config.h"
22#include "libavutil/attributes.h"
23#include "libavutil/cpu.h"
24#include "libavutil/intreadwrite.h"
25#include "libavutil/ppc/cpu.h"
26#include "libavutil/ppc/types_altivec.h"
27#include "libavutil/ppc/util_altivec.h"
28#include "libavcodec/h264data.h"
29#include "libavcodec/h264dsp.h"
30
31#if HAVE_ALTIVEC
32
33/****************************************************************************
34 * IDCT transform:
35 ****************************************************************************/
36
37#define VEC_1D_DCT(vb0,vb1,vb2,vb3,va0,va1,va2,va3) \
38 /* 1st stage */ \
39 vz0 = vec_add(vb0,vb2); /* temp[0] = Y[0] + Y[2] */ \
40 vz1 = vec_sub(vb0,vb2); /* temp[1] = Y[0] - Y[2] */ \
41 vz2 = vec_sra(vb1,vec_splat_u16(1)); \
42 vz2 = vec_sub(vz2,vb3); /* temp[2] = Y[1].1/2 - Y[3] */ \
43 vz3 = vec_sra(vb3,vec_splat_u16(1)); \
44 vz3 = vec_add(vb1,vz3); /* temp[3] = Y[1] + Y[3].1/2 */ \
45 /* 2nd stage: output */ \
46 va0 = vec_add(vz0,vz3); /* x[0] = temp[0] + temp[3] */ \
47 va1 = vec_add(vz1,vz2); /* x[1] = temp[1] + temp[2] */ \
48 va2 = vec_sub(vz1,vz2); /* x[2] = temp[1] - temp[2] */ \
49 va3 = vec_sub(vz0,vz3) /* x[3] = temp[0] - temp[3] */
50
51#define VEC_TRANSPOSE_4(a0,a1,a2,a3,b0,b1,b2,b3) \
52 b0 = vec_mergeh( a0, a0 ); \
53 b1 = vec_mergeh( a1, a0 ); \
54 b2 = vec_mergeh( a2, a0 ); \
55 b3 = vec_mergeh( a3, a0 ); \
56 a0 = vec_mergeh( b0, b2 ); \
57 a1 = vec_mergel( b0, b2 ); \
58 a2 = vec_mergeh( b1, b3 ); \
59 a3 = vec_mergel( b1, b3 ); \
60 b0 = vec_mergeh( a0, a2 ); \
61 b1 = vec_mergel( a0, a2 ); \
62 b2 = vec_mergeh( a1, a3 ); \
63 b3 = vec_mergel( a1, a3 )
64
65#define VEC_LOAD_U8_ADD_S16_STORE_U8(va) \
66 vdst_orig = vec_ld(0, dst); \
67 vdst = vec_perm(vdst_orig, zero_u8v, vdst_mask); \
68 vdst_ss = (vec_s16) vec_mergeh(zero_u8v, vdst); \
69 va = vec_add(va, vdst_ss); \
70 va_u8 = vec_packsu(va, zero_s16v); \
71 va_u32 = vec_splat((vec_u32)va_u8, 0); \
72 vec_ste(va_u32, element, (uint32_t*)dst);
73
74static void h264_idct_add_altivec(uint8_t *dst, int16_t *block, int stride)
75{
76 vec_s16 va0, va1, va2, va3;
77 vec_s16 vz0, vz1, vz2, vz3;
78 vec_s16 vtmp0, vtmp1, vtmp2, vtmp3;
79 vec_u8 va_u8;
80 vec_u32 va_u32;
81 vec_s16 vdst_ss;
82 const vec_u16 v6us = vec_splat_u16(6);
83 vec_u8 vdst, vdst_orig;
84 vec_u8 vdst_mask = vec_lvsl(0, dst);
85 int element = ((unsigned long)dst & 0xf) >> 2;
86 LOAD_ZERO;
87
88 block[0] += 32; /* add 32 as a DC-level for rounding */
89
90 vtmp0 = vec_ld(0,block);
91 vtmp1 = vec_sld(vtmp0, vtmp0, 8);
92 vtmp2 = vec_ld(16,block);
93 vtmp3 = vec_sld(vtmp2, vtmp2, 8);
94 memset(block, 0, 16 * sizeof(int16_t));
95
96 VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
97 VEC_TRANSPOSE_4(va0,va1,va2,va3,vtmp0,vtmp1,vtmp2,vtmp3);
98 VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
99
100 va0 = vec_sra(va0,v6us);
101 va1 = vec_sra(va1,v6us);
102 va2 = vec_sra(va2,v6us);
103 va3 = vec_sra(va3,v6us);
104
105 VEC_LOAD_U8_ADD_S16_STORE_U8(va0);
106 dst += stride;
107 VEC_LOAD_U8_ADD_S16_STORE_U8(va1);
108 dst += stride;
109 VEC_LOAD_U8_ADD_S16_STORE_U8(va2);
110 dst += stride;
111 VEC_LOAD_U8_ADD_S16_STORE_U8(va3);
112}
113
114#define IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7) {\
115 /* a0 = SRC(0) + SRC(4); */ \
116 vec_s16 a0v = vec_add(s0, s4); \
117 /* a2 = SRC(0) - SRC(4); */ \
118 vec_s16 a2v = vec_sub(s0, s4); \
119 /* a4 = (SRC(2)>>1) - SRC(6); */ \
120 vec_s16 a4v = vec_sub(vec_sra(s2, onev), s6); \
121 /* a6 = (SRC(6)>>1) + SRC(2); */ \
122 vec_s16 a6v = vec_add(vec_sra(s6, onev), s2); \
123 /* b0 = a0 + a6; */ \
124 vec_s16 b0v = vec_add(a0v, a6v); \
125 /* b2 = a2 + a4; */ \
126 vec_s16 b2v = vec_add(a2v, a4v); \
127 /* b4 = a2 - a4; */ \
128 vec_s16 b4v = vec_sub(a2v, a4v); \
129 /* b6 = a0 - a6; */ \
130 vec_s16 b6v = vec_sub(a0v, a6v); \
131 /* a1 = SRC(5) - SRC(3) - SRC(7) - (SRC(7)>>1); */ \
132 /* a1 = (SRC(5)-SRC(3)) - (SRC(7) + (SRC(7)>>1)); */ \
133 vec_s16 a1v = vec_sub( vec_sub(s5, s3), vec_add(s7, vec_sra(s7, onev)) ); \
134 /* a3 = SRC(7) + SRC(1) - SRC(3) - (SRC(3)>>1); */ \
135 /* a3 = (SRC(7)+SRC(1)) - (SRC(3) + (SRC(3)>>1)); */ \
136 vec_s16 a3v = vec_sub( vec_add(s7, s1), vec_add(s3, vec_sra(s3, onev)) );\
137 /* a5 = SRC(7) - SRC(1) + SRC(5) + (SRC(5)>>1); */ \
138 /* a5 = (SRC(7)-SRC(1)) + SRC(5) + (SRC(5)>>1); */ \
139 vec_s16 a5v = vec_add( vec_sub(s7, s1), vec_add(s5, vec_sra(s5, onev)) );\
140 /* a7 = SRC(5)+SRC(3) + SRC(1) + (SRC(1)>>1); */ \
141 vec_s16 a7v = vec_add( vec_add(s5, s3), vec_add(s1, vec_sra(s1, onev)) );\
142 /* b1 = (a7>>2) + a1; */ \
143 vec_s16 b1v = vec_add( vec_sra(a7v, twov), a1v); \
144 /* b3 = a3 + (a5>>2); */ \
145 vec_s16 b3v = vec_add(a3v, vec_sra(a5v, twov)); \
146 /* b5 = (a3>>2) - a5; */ \
147 vec_s16 b5v = vec_sub( vec_sra(a3v, twov), a5v); \
148 /* b7 = a7 - (a1>>2); */ \
149 vec_s16 b7v = vec_sub( a7v, vec_sra(a1v, twov)); \
150 /* DST(0, b0 + b7); */ \
151 d0 = vec_add(b0v, b7v); \
152 /* DST(1, b2 + b5); */ \
153 d1 = vec_add(b2v, b5v); \
154 /* DST(2, b4 + b3); */ \
155 d2 = vec_add(b4v, b3v); \
156 /* DST(3, b6 + b1); */ \
157 d3 = vec_add(b6v, b1v); \
158 /* DST(4, b6 - b1); */ \
159 d4 = vec_sub(b6v, b1v); \
160 /* DST(5, b4 - b3); */ \
161 d5 = vec_sub(b4v, b3v); \
162 /* DST(6, b2 - b5); */ \
163 d6 = vec_sub(b2v, b5v); \
164 /* DST(7, b0 - b7); */ \
165 d7 = vec_sub(b0v, b7v); \
166}
167
168#define ALTIVEC_STORE_SUM_CLIP(dest, idctv, perm_ldv, perm_stv, sel) { \
169 /* unaligned load */ \
170 vec_u8 hv = vec_ld( 0, dest ); \
171 vec_u8 lv = vec_ld( 7, dest ); \
172 vec_u8 dstv = vec_perm( hv, lv, (vec_u8)perm_ldv ); \
173 vec_s16 idct_sh6 = vec_sra(idctv, sixv); \
174 vec_u16 dst16 = (vec_u16)vec_mergeh(zero_u8v, dstv); \
175 vec_s16 idstsum = vec_adds(idct_sh6, (vec_s16)dst16); \
176 vec_u8 idstsum8 = vec_packsu(zero_s16v, idstsum); \
177 vec_u8 edgehv; \
178 /* unaligned store */ \
179 vec_u8 bodyv = vec_perm( idstsum8, idstsum8, perm_stv );\
180 vec_u8 edgelv = vec_perm( sel, zero_u8v, perm_stv ); \
181 lv = vec_sel( lv, bodyv, edgelv ); \
182 vec_st( lv, 7, dest ); \
183 hv = vec_ld( 0, dest ); \
184 edgehv = vec_perm( zero_u8v, sel, perm_stv ); \
185 hv = vec_sel( hv, bodyv, edgehv ); \
186 vec_st( hv, 0, dest ); \
187 }
188
189static void h264_idct8_add_altivec(uint8_t *dst, int16_t *dct, int stride)
190{
191 vec_s16 s0, s1, s2, s3, s4, s5, s6, s7;
192 vec_s16 d0, d1, d2, d3, d4, d5, d6, d7;
193 vec_s16 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;
194
195 vec_u8 perm_ldv = vec_lvsl(0, dst);
196 vec_u8 perm_stv = vec_lvsr(8, dst);
197
198 const vec_u16 onev = vec_splat_u16(1);
199 const vec_u16 twov = vec_splat_u16(2);
200 const vec_u16 sixv = vec_splat_u16(6);
201
202 const vec_u8 sel = (vec_u8) {0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1};
203 LOAD_ZERO;
204
205 dct[0] += 32; // rounding for the >>6 at the end
206
207 s0 = vec_ld(0x00, (int16_t*)dct);
208 s1 = vec_ld(0x10, (int16_t*)dct);
209 s2 = vec_ld(0x20, (int16_t*)dct);
210 s3 = vec_ld(0x30, (int16_t*)dct);
211 s4 = vec_ld(0x40, (int16_t*)dct);
212 s5 = vec_ld(0x50, (int16_t*)dct);
213 s6 = vec_ld(0x60, (int16_t*)dct);
214 s7 = vec_ld(0x70, (int16_t*)dct);
215 memset(dct, 0, 64 * sizeof(int16_t));
216
217 IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,
218 d0, d1, d2, d3, d4, d5, d6, d7);
219
220 TRANSPOSE8( d0, d1, d2, d3, d4, d5, d6, d7 );
221
222 IDCT8_1D_ALTIVEC(d0, d1, d2, d3, d4, d5, d6, d7,
223 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);
224
225 ALTIVEC_STORE_SUM_CLIP(&dst[0*stride], idct0, perm_ldv, perm_stv, sel);
226 ALTIVEC_STORE_SUM_CLIP(&dst[1*stride], idct1, perm_ldv, perm_stv, sel);
227 ALTIVEC_STORE_SUM_CLIP(&dst[2*stride], idct2, perm_ldv, perm_stv, sel);
228 ALTIVEC_STORE_SUM_CLIP(&dst[3*stride], idct3, perm_ldv, perm_stv, sel);
229 ALTIVEC_STORE_SUM_CLIP(&dst[4*stride], idct4, perm_ldv, perm_stv, sel);
230 ALTIVEC_STORE_SUM_CLIP(&dst[5*stride], idct5, perm_ldv, perm_stv, sel);
231 ALTIVEC_STORE_SUM_CLIP(&dst[6*stride], idct6, perm_ldv, perm_stv, sel);
232 ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
233}
234
235static av_always_inline void h264_idct_dc_add_internal(uint8_t *dst, int16_t *block, int stride, int size)
236{
237 vec_s16 dc16;
238 vec_u8 dcplus, dcminus, v0, v1, v2, v3, aligner;
239 LOAD_ZERO;
240 DECLARE_ALIGNED(16, int, dc);
241 int i;
242
243 dc = (block[0] + 32) >> 6;
244 block[0] = 0;
245 dc16 = vec_splat((vec_s16) vec_lde(0, &dc), 1);
246
247 if (size == 4)
248 dc16 = vec_sld(dc16, zero_s16v, 8);
249 dcplus = vec_packsu(dc16, zero_s16v);
250 dcminus = vec_packsu(vec_sub(zero_s16v, dc16), zero_s16v);
251
252 aligner = vec_lvsr(0, dst);
253 dcplus = vec_perm(dcplus, dcplus, aligner);
254 dcminus = vec_perm(dcminus, dcminus, aligner);
255
256 for (i = 0; i < size; i += 4) {
257 v0 = vec_ld(0, dst+0*stride);
258 v1 = vec_ld(0, dst+1*stride);
259 v2 = vec_ld(0, dst+2*stride);
260 v3 = vec_ld(0, dst+3*stride);
261
262 v0 = vec_adds(v0, dcplus);
263 v1 = vec_adds(v1, dcplus);
264 v2 = vec_adds(v2, dcplus);
265 v3 = vec_adds(v3, dcplus);
266
267 v0 = vec_subs(v0, dcminus);
268 v1 = vec_subs(v1, dcminus);
269 v2 = vec_subs(v2, dcminus);
270 v3 = vec_subs(v3, dcminus);
271
272 vec_st(v0, 0, dst+0*stride);
273 vec_st(v1, 0, dst+1*stride);
274 vec_st(v2, 0, dst+2*stride);
275 vec_st(v3, 0, dst+3*stride);
276
277 dst += 4*stride;
278 }
279}
280
281static void h264_idct_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
282{
283 h264_idct_dc_add_internal(dst, block, stride, 4);
284}
285
286static void h264_idct8_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
287{
288 h264_idct_dc_add_internal(dst, block, stride, 8);
289}
290
291static void h264_idct_add16_altivec(uint8_t *dst, const int *block_offset,
292 int16_t *block, int stride,
293 const uint8_t nnzc[15 * 8])
294{
295 int i;
296 for(i=0; i<16; i++){
297 int nnz = nnzc[ scan8[i] ];
298 if(nnz){
299 if(nnz==1 && block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
300 else h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
301 }
302 }
303}
304
305static void h264_idct_add16intra_altivec(uint8_t *dst, const int *block_offset,
306 int16_t *block, int stride,
307 const uint8_t nnzc[15 * 8])
308{
309 int i;
310 for(i=0; i<16; i++){
311 if(nnzc[ scan8[i] ]) h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
312 else if(block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
313 }
314}
315
316static void h264_idct8_add4_altivec(uint8_t *dst, const int *block_offset,
317 int16_t *block, int stride,
318 const uint8_t nnzc[15 * 8])
319{
320 int i;
321 for(i=0; i<16; i+=4){
322 int nnz = nnzc[ scan8[i] ];
323 if(nnz){
324 if(nnz==1 && block[i*16]) h264_idct8_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
325 else h264_idct8_add_altivec(dst + block_offset[i], block + i*16, stride);
326 }
327 }
328}
329
330static void h264_idct_add8_altivec(uint8_t **dest, const int *block_offset,
331 int16_t *block, int stride,
332 const uint8_t nnzc[15 * 8])
333{
334 int i, j;
335 for (j = 1; j < 3; j++) {
336 for(i = j * 16; i < j * 16 + 4; i++){
337 if(nnzc[ scan8[i] ])
338 h264_idct_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
339 else if(block[i*16])
340 h264_idct_dc_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
341 }
342 }
343}
344
345#define transpose4x16(r0, r1, r2, r3) { \
346 register vec_u8 r4; \
347 register vec_u8 r5; \
348 register vec_u8 r6; \
349 register vec_u8 r7; \
350 \
351 r4 = vec_mergeh(r0, r2); /*0, 2 set 0*/ \
352 r5 = vec_mergel(r0, r2); /*0, 2 set 1*/ \
353 r6 = vec_mergeh(r1, r3); /*1, 3 set 0*/ \
354 r7 = vec_mergel(r1, r3); /*1, 3 set 1*/ \
355 \
356 r0 = vec_mergeh(r4, r6); /*all set 0*/ \
357 r1 = vec_mergel(r4, r6); /*all set 1*/ \
358 r2 = vec_mergeh(r5, r7); /*all set 2*/ \
359 r3 = vec_mergel(r5, r7); /*all set 3*/ \
360}
361
362static inline void write16x4(uint8_t *dst, int dst_stride,
363 register vec_u8 r0, register vec_u8 r1,
364 register vec_u8 r2, register vec_u8 r3) {
365 DECLARE_ALIGNED(16, unsigned char, result)[64];
366 uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst;
367 int int_dst_stride = dst_stride/4;
368
369 vec_st(r0, 0, result);
370 vec_st(r1, 16, result);
371 vec_st(r2, 32, result);
372 vec_st(r3, 48, result);
373 /* FIXME: there has to be a better way!!!! */
374 *dst_int = *src_int;
375 *(dst_int+ int_dst_stride) = *(src_int + 1);
376 *(dst_int+ 2*int_dst_stride) = *(src_int + 2);
377 *(dst_int+ 3*int_dst_stride) = *(src_int + 3);
378 *(dst_int+ 4*int_dst_stride) = *(src_int + 4);
379 *(dst_int+ 5*int_dst_stride) = *(src_int + 5);
380 *(dst_int+ 6*int_dst_stride) = *(src_int + 6);
381 *(dst_int+ 7*int_dst_stride) = *(src_int + 7);
382 *(dst_int+ 8*int_dst_stride) = *(src_int + 8);
383 *(dst_int+ 9*int_dst_stride) = *(src_int + 9);
384 *(dst_int+10*int_dst_stride) = *(src_int + 10);
385 *(dst_int+11*int_dst_stride) = *(src_int + 11);
386 *(dst_int+12*int_dst_stride) = *(src_int + 12);
387 *(dst_int+13*int_dst_stride) = *(src_int + 13);
388 *(dst_int+14*int_dst_stride) = *(src_int + 14);
389 *(dst_int+15*int_dst_stride) = *(src_int + 15);
390}
391
392/** @brief performs a 6x16 transpose of data in src, and stores it to dst
393 @todo FIXME: see if we can't spare some vec_lvsl() by them factorizing
394 out of unaligned_load() */
395#define readAndTranspose16x6(src, src_stride, r8, r9, r10, r11, r12, r13) {\
396 register vec_u8 r0 = unaligned_load(0, src); \
397 register vec_u8 r1 = unaligned_load( src_stride, src); \
398 register vec_u8 r2 = unaligned_load(2* src_stride, src); \
399 register vec_u8 r3 = unaligned_load(3* src_stride, src); \
400 register vec_u8 r4 = unaligned_load(4* src_stride, src); \
401 register vec_u8 r5 = unaligned_load(5* src_stride, src); \
402 register vec_u8 r6 = unaligned_load(6* src_stride, src); \
403 register vec_u8 r7 = unaligned_load(7* src_stride, src); \
404 register vec_u8 r14 = unaligned_load(14*src_stride, src); \
405 register vec_u8 r15 = unaligned_load(15*src_stride, src); \
406 \
407 r8 = unaligned_load( 8*src_stride, src); \
408 r9 = unaligned_load( 9*src_stride, src); \
409 r10 = unaligned_load(10*src_stride, src); \
410 r11 = unaligned_load(11*src_stride, src); \
411 r12 = unaligned_load(12*src_stride, src); \
412 r13 = unaligned_load(13*src_stride, src); \
413 \
414 /*Merge first pairs*/ \
415 r0 = vec_mergeh(r0, r8); /*0, 8*/ \
416 r1 = vec_mergeh(r1, r9); /*1, 9*/ \
417 r2 = vec_mergeh(r2, r10); /*2,10*/ \
418 r3 = vec_mergeh(r3, r11); /*3,11*/ \
419 r4 = vec_mergeh(r4, r12); /*4,12*/ \
420 r5 = vec_mergeh(r5, r13); /*5,13*/ \
421 r6 = vec_mergeh(r6, r14); /*6,14*/ \
422 r7 = vec_mergeh(r7, r15); /*7,15*/ \
423 \
424 /*Merge second pairs*/ \
425 r8 = vec_mergeh(r0, r4); /*0,4, 8,12 set 0*/ \
426 r9 = vec_mergel(r0, r4); /*0,4, 8,12 set 1*/ \
427 r10 = vec_mergeh(r1, r5); /*1,5, 9,13 set 0*/ \
428 r11 = vec_mergel(r1, r5); /*1,5, 9,13 set 1*/ \
429 r12 = vec_mergeh(r2, r6); /*2,6,10,14 set 0*/ \
430 r13 = vec_mergel(r2, r6); /*2,6,10,14 set 1*/ \
431 r14 = vec_mergeh(r3, r7); /*3,7,11,15 set 0*/ \
432 r15 = vec_mergel(r3, r7); /*3,7,11,15 set 1*/ \
433 \
434 /*Third merge*/ \
435 r0 = vec_mergeh(r8, r12); /*0,2,4,6,8,10,12,14 set 0*/ \
436 r1 = vec_mergel(r8, r12); /*0,2,4,6,8,10,12,14 set 1*/ \
437 r2 = vec_mergeh(r9, r13); /*0,2,4,6,8,10,12,14 set 2*/ \
438 r4 = vec_mergeh(r10, r14); /*1,3,5,7,9,11,13,15 set 0*/ \
439 r5 = vec_mergel(r10, r14); /*1,3,5,7,9,11,13,15 set 1*/ \
440 r6 = vec_mergeh(r11, r15); /*1,3,5,7,9,11,13,15 set 2*/ \
441 /* Don't need to compute 3 and 7*/ \
442 \
443 /*Final merge*/ \
444 r8 = vec_mergeh(r0, r4); /*all set 0*/ \
445 r9 = vec_mergel(r0, r4); /*all set 1*/ \
446 r10 = vec_mergeh(r1, r5); /*all set 2*/ \
447 r11 = vec_mergel(r1, r5); /*all set 3*/ \
448 r12 = vec_mergeh(r2, r6); /*all set 4*/ \
449 r13 = vec_mergel(r2, r6); /*all set 5*/ \
450 /* Don't need to compute 14 and 15*/ \
451 \
452}
453
454// out: o = |x-y| < a
455static inline vec_u8 diff_lt_altivec ( register vec_u8 x,
456 register vec_u8 y,
457 register vec_u8 a) {
458
459 register vec_u8 diff = vec_subs(x, y);
460 register vec_u8 diffneg = vec_subs(y, x);
461 register vec_u8 o = vec_or(diff, diffneg); /* |x-y| */
462 o = (vec_u8)vec_cmplt(o, a);
463 return o;
464}
465
466static inline vec_u8 h264_deblock_mask ( register vec_u8 p0,
467 register vec_u8 p1,
468 register vec_u8 q0,
469 register vec_u8 q1,
470 register vec_u8 alpha,
471 register vec_u8 beta) {
472
473 register vec_u8 mask;
474 register vec_u8 tempmask;
475
476 mask = diff_lt_altivec(p0, q0, alpha);
477 tempmask = diff_lt_altivec(p1, p0, beta);
478 mask = vec_and(mask, tempmask);
479 tempmask = diff_lt_altivec(q1, q0, beta);
480 mask = vec_and(mask, tempmask);
481
482 return mask;
483}
484
485// out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
486static inline vec_u8 h264_deblock_q1(register vec_u8 p0,
487 register vec_u8 p1,
488 register vec_u8 p2,
489 register vec_u8 q0,
490 register vec_u8 tc0) {
491
492 register vec_u8 average = vec_avg(p0, q0);
493 register vec_u8 temp;
494 register vec_u8 uncliped;
495 register vec_u8 ones;
496 register vec_u8 max;
497 register vec_u8 min;
498 register vec_u8 newp1;
499
500 temp = vec_xor(average, p2);
501 average = vec_avg(average, p2); /*avg(p2, avg(p0, q0)) */
502 ones = vec_splat_u8(1);
503 temp = vec_and(temp, ones); /*(p2^avg(p0, q0)) & 1 */
504 uncliped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */
505 max = vec_adds(p1, tc0);
506 min = vec_subs(p1, tc0);
507 newp1 = vec_max(min, uncliped);
508 newp1 = vec_min(max, newp1);
509 return newp1;
510}
511
512#define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) { \
513 \
514 const vec_u8 A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4)); \
515 \
516 register vec_u8 pq0bit = vec_xor(p0,q0); \
517 register vec_u8 q1minus; \
518 register vec_u8 p0minus; \
519 register vec_u8 stage1; \
520 register vec_u8 stage2; \
521 register vec_u8 vec160; \
522 register vec_u8 delta; \
523 register vec_u8 deltaneg; \
524 \
525 q1minus = vec_nor(q1, q1); /* 255 - q1 */ \
526 stage1 = vec_avg(p1, q1minus); /* (p1 - q1 + 256)>>1 */ \
527 stage2 = vec_sr(stage1, vec_splat_u8(1)); /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */ \
528 p0minus = vec_nor(p0, p0); /* 255 - p0 */ \
529 stage1 = vec_avg(q0, p0minus); /* (q0 - p0 + 256)>>1 */ \
530 pq0bit = vec_and(pq0bit, vec_splat_u8(1)); \
531 stage2 = vec_avg(stage2, pq0bit); /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */ \
532 stage2 = vec_adds(stage2, stage1); /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */ \
533 vec160 = vec_ld(0, &A0v); \
534 deltaneg = vec_subs(vec160, stage2); /* -d */ \
535 delta = vec_subs(stage2, vec160); /* d */ \
536 deltaneg = vec_min(tc0masked, deltaneg); \
537 delta = vec_min(tc0masked, delta); \
538 p0 = vec_subs(p0, deltaneg); \
539 q0 = vec_subs(q0, delta); \
540 p0 = vec_adds(p0, delta); \
541 q0 = vec_adds(q0, deltaneg); \
542}
543
544#define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) { \
545 DECLARE_ALIGNED(16, unsigned char, temp)[16]; \
546 register vec_u8 alphavec; \
547 register vec_u8 betavec; \
548 register vec_u8 mask; \
549 register vec_u8 p1mask; \
550 register vec_u8 q1mask; \
551 register vector signed char tc0vec; \
552 register vec_u8 finaltc0; \
553 register vec_u8 tc0masked; \
554 register vec_u8 newp1; \
555 register vec_u8 newq1; \
556 \
557 temp[0] = alpha; \
558 temp[1] = beta; \
559 alphavec = vec_ld(0, temp); \
560 betavec = vec_splat(alphavec, 0x1); \
561 alphavec = vec_splat(alphavec, 0x0); \
562 mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */ \
563 \
564 AV_COPY32(temp, tc0); \
565 tc0vec = vec_ld(0, (signed char*)temp); \
566 tc0vec = vec_mergeh(tc0vec, tc0vec); \
567 tc0vec = vec_mergeh(tc0vec, tc0vec); \
568 mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1))); /* if tc0[i] >= 0 */ \
569 finaltc0 = vec_and((vec_u8)tc0vec, mask); /* tc = tc0 */ \
570 \
571 p1mask = diff_lt_altivec(p2, p0, betavec); \
572 p1mask = vec_and(p1mask, mask); /* if ( |p2 - p0| < beta) */ \
573 tc0masked = vec_and(p1mask, (vec_u8)tc0vec); \
574 finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \
575 newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked); \
576 /*end if*/ \
577 \
578 q1mask = diff_lt_altivec(q2, q0, betavec); \
579 q1mask = vec_and(q1mask, mask); /* if ( |q2 - q0| < beta ) */\
580 tc0masked = vec_and(q1mask, (vec_u8)tc0vec); \
581 finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \
582 newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked); \
583 /*end if*/ \
584 \
585 h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \
586 p1 = newp1; \
587 q1 = newq1; \
588}
589
590static void h264_v_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
591
592 if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0) {
593 register vec_u8 p2 = vec_ld(-3*stride, pix);
594 register vec_u8 p1 = vec_ld(-2*stride, pix);
595 register vec_u8 p0 = vec_ld(-1*stride, pix);
596 register vec_u8 q0 = vec_ld(0, pix);
597 register vec_u8 q1 = vec_ld(stride, pix);
598 register vec_u8 q2 = vec_ld(2*stride, pix);
599 h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0);
600 vec_st(p1, -2*stride, pix);
601 vec_st(p0, -1*stride, pix);
602 vec_st(q0, 0, pix);
603 vec_st(q1, stride, pix);
604 }
605}
606
607static void h264_h_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
608
609 register vec_u8 line0, line1, line2, line3, line4, line5;
610 if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0)
611 return;
612 readAndTranspose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5);
613 h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0);
614 transpose4x16(line1, line2, line3, line4);
615 write16x4(pix-2, stride, line1, line2, line3, line4);
616}
617
618static av_always_inline
619void weight_h264_W_altivec(uint8_t *block, int stride, int height,
620 int log2_denom, int weight, int offset, int w)
621{
622 int y, aligned;
623 vec_u8 vblock;
624 vec_s16 vtemp, vweight, voffset, v0, v1;
625 vec_u16 vlog2_denom;
626 DECLARE_ALIGNED(16, int32_t, temp)[4];
627 LOAD_ZERO;
628
629 offset <<= log2_denom;
630 if(log2_denom) offset += 1<<(log2_denom-1);
631 temp[0] = log2_denom;
632 temp[1] = weight;
633 temp[2] = offset;
634
635 vtemp = (vec_s16)vec_ld(0, temp);
636 vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
637 vweight = vec_splat(vtemp, 3);
638 voffset = vec_splat(vtemp, 5);
639 aligned = !((unsigned long)block & 0xf);
640
641 for (y = 0; y < height; y++) {
642 vblock = vec_ld(0, block);
643
644 v0 = (vec_s16)vec_mergeh(zero_u8v, vblock);
645 v1 = (vec_s16)vec_mergel(zero_u8v, vblock);
646
647 if (w == 16 || aligned) {
648 v0 = vec_mladd(v0, vweight, zero_s16v);
649 v0 = vec_adds(v0, voffset);
650 v0 = vec_sra(v0, vlog2_denom);
651 }
652 if (w == 16 || !aligned) {
653 v1 = vec_mladd(v1, vweight, zero_s16v);
654 v1 = vec_adds(v1, voffset);
655 v1 = vec_sra(v1, vlog2_denom);
656 }
657 vblock = vec_packsu(v0, v1);
658 vec_st(vblock, 0, block);
659
660 block += stride;
661 }
662}
663
664static av_always_inline
665void biweight_h264_W_altivec(uint8_t *dst, uint8_t *src, int stride, int height,
666 int log2_denom, int weightd, int weights, int offset, int w)
667{
668 int y, dst_aligned, src_aligned;
669 vec_u8 vsrc, vdst;
670 vec_s16 vtemp, vweights, vweightd, voffset, v0, v1, v2, v3;
671 vec_u16 vlog2_denom;
672 DECLARE_ALIGNED(16, int32_t, temp)[4];
673 LOAD_ZERO;
674
675 offset = ((offset + 1) | 1) << log2_denom;
676 temp[0] = log2_denom+1;
677 temp[1] = weights;
678 temp[2] = weightd;
679 temp[3] = offset;
680
681 vtemp = (vec_s16)vec_ld(0, temp);
682 vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
683 vweights = vec_splat(vtemp, 3);
684 vweightd = vec_splat(vtemp, 5);
685 voffset = vec_splat(vtemp, 7);
686 dst_aligned = !((unsigned long)dst & 0xf);
687 src_aligned = !((unsigned long)src & 0xf);
688
689 for (y = 0; y < height; y++) {
690 vdst = vec_ld(0, dst);
691 vsrc = vec_ld(0, src);
692
693 v0 = (vec_s16)vec_mergeh(zero_u8v, vdst);
694 v1 = (vec_s16)vec_mergel(zero_u8v, vdst);
695 v2 = (vec_s16)vec_mergeh(zero_u8v, vsrc);
696 v3 = (vec_s16)vec_mergel(zero_u8v, vsrc);
697
698 if (w == 8) {
699 if (src_aligned)
700 v3 = v2;
701 else
702 v2 = v3;
703 }
704
705 if (w == 16 || dst_aligned) {
706 v0 = vec_mladd(v0, vweightd, zero_s16v);
707 v2 = vec_mladd(v2, vweights, zero_s16v);
708
709 v0 = vec_adds(v0, voffset);
710 v0 = vec_adds(v0, v2);
711 v0 = vec_sra(v0, vlog2_denom);
712 }
713 if (w == 16 || !dst_aligned) {
714 v1 = vec_mladd(v1, vweightd, zero_s16v);
715 v3 = vec_mladd(v3, vweights, zero_s16v);
716
717 v1 = vec_adds(v1, voffset);
718 v1 = vec_adds(v1, v3);
719 v1 = vec_sra(v1, vlog2_denom);
720 }
721 vdst = vec_packsu(v0, v1);
722 vec_st(vdst, 0, dst);
723
724 dst += stride;
725 src += stride;
726 }
727}
728
729#define H264_WEIGHT(W) \
730static void weight_h264_pixels ## W ## _altivec(uint8_t *block, int stride, int height, \
731 int log2_denom, int weight, int offset) \
732{ \
733 weight_h264_W_altivec(block, stride, height, log2_denom, weight, offset, W); \
734}\
735static void biweight_h264_pixels ## W ## _altivec(uint8_t *dst, uint8_t *src, int stride, int height, \
736 int log2_denom, int weightd, int weights, int offset) \
737{ \
738 biweight_h264_W_altivec(dst, src, stride, height, log2_denom, weightd, weights, offset, W); \
739}
740
741H264_WEIGHT(16)
742H264_WEIGHT( 8)
743#endif /* HAVE_ALTIVEC */
744
745av_cold void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
746 const int chroma_format_idc)
747{
748#if HAVE_ALTIVEC
749 if (!PPC_ALTIVEC(av_get_cpu_flags()))
750 return;
751
752 if (bit_depth == 8) {
753 c->h264_idct_add = h264_idct_add_altivec;
754 if (chroma_format_idc <= 1)
755 c->h264_idct_add8 = h264_idct_add8_altivec;
756 c->h264_idct_add16 = h264_idct_add16_altivec;
757 c->h264_idct_add16intra = h264_idct_add16intra_altivec;
758 c->h264_idct_dc_add= h264_idct_dc_add_altivec;
759 c->h264_idct8_dc_add = h264_idct8_dc_add_altivec;
760 c->h264_idct8_add = h264_idct8_add_altivec;
761 c->h264_idct8_add4 = h264_idct8_add4_altivec;
762 c->h264_v_loop_filter_luma= h264_v_loop_filter_luma_altivec;
763 c->h264_h_loop_filter_luma= h264_h_loop_filter_luma_altivec;
764
765 c->weight_h264_pixels_tab[0] = weight_h264_pixels16_altivec;
766 c->weight_h264_pixels_tab[1] = weight_h264_pixels8_altivec;
767 c->biweight_h264_pixels_tab[0] = biweight_h264_pixels16_altivec;
768 c->biweight_h264_pixels_tab[1] = biweight_h264_pixels8_altivec;
769 }
770#endif /* HAVE_ALTIVEC */
771}
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