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
23 #include <stdint.h>
24 #include <string.h>
25
26 #include "libavutil/attributes.h"
27 #include "libavutil/cpu.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/mem_internal.h"
30 #include "libavutil/ppc/cpu.h"
31 #include "libavutil/ppc/util_altivec.h"
32
33 #include "libavcodec/h264dec.h"
34 #include "libavcodec/h264dsp.h"
35
36 #if HAVE_ALTIVEC
37
38 /****************************************************************************
39 * IDCT transform:
40 ****************************************************************************/
41
42 #define VEC_1D_DCT(vb0,vb1,vb2,vb3,va0,va1,va2,va3) \
43 /* 1st stage */ \
44 vz0 = vec_add(vb0,vb2); /* temp[0] = Y[0] + Y[2] */ \
45 vz1 = vec_sub(vb0,vb2); /* temp[1] = Y[0] - Y[2] */ \
46 vz2 = vec_sra(vb1,vec_splat_u16(1)); \
47 vz2 = vec_sub(vz2,vb3); /* temp[2] = Y[1].1/2 - Y[3] */ \
48 vz3 = vec_sra(vb3,vec_splat_u16(1)); \
49 vz3 = vec_add(vb1,vz3); /* temp[3] = Y[1] + Y[3].1/2 */ \
50 /* 2nd stage: output */ \
51 va0 = vec_add(vz0,vz3); /* x[0] = temp[0] + temp[3] */ \
52 va1 = vec_add(vz1,vz2); /* x[1] = temp[1] + temp[2] */ \
53 va2 = vec_sub(vz1,vz2); /* x[2] = temp[1] - temp[2] */ \
54 va3 = vec_sub(vz0,vz3) /* x[3] = temp[0] - temp[3] */
55
56 #define VEC_TRANSPOSE_4(a0,a1,a2,a3,b0,b1,b2,b3) \
57 b0 = vec_mergeh( a0, a0 ); \
58 b1 = vec_mergeh( a1, a0 ); \
59 b2 = vec_mergeh( a2, a0 ); \
60 b3 = vec_mergeh( a3, a0 ); \
61 a0 = vec_mergeh( b0, b2 ); \
62 a1 = vec_mergel( b0, b2 ); \
63 a2 = vec_mergeh( b1, b3 ); \
64 a3 = vec_mergel( b1, b3 ); \
65 b0 = vec_mergeh( a0, a2 ); \
66 b1 = vec_mergel( a0, a2 ); \
67 b2 = vec_mergeh( a1, a3 ); \
68 b3 = vec_mergel( a1, a3 )
69
70 #if HAVE_BIGENDIAN
71 #define vdst_load(d) \
72 vdst_orig = vec_ld(0, dst); \
73 vdst = vec_perm(vdst_orig, zero_u8v, vdst_mask);
74 #else
75 #define vdst_load(d) vdst = vec_vsx_ld(0, dst)
76 #endif
77
78 #define VEC_LOAD_U8_ADD_S16_STORE_U8(va) \
79 vdst_load(); \
80 vdst_ss = (vec_s16) VEC_MERGEH(zero_u8v, vdst); \
81 va = vec_add(va, vdst_ss); \
82 va_u8 = vec_packsu(va, zero_s16v); \
83 va_u32 = vec_splat((vec_u32)va_u8, 0); \
84 vec_ste(va_u32, element, (uint32_t*)dst);
85
h264_idct_add_altivec(uint8_t * dst,int16_t * block,int stride)86 static void h264_idct_add_altivec(uint8_t *dst, int16_t *block, int stride)
87 {
88 vec_s16 va0, va1, va2, va3;
89 vec_s16 vz0, vz1, vz2, vz3;
90 vec_s16 vtmp0, vtmp1, vtmp2, vtmp3;
91 vec_u8 va_u8;
92 vec_u32 va_u32;
93 vec_s16 vdst_ss;
94 const vec_u16 v6us = vec_splat_u16(6);
95 vec_u8 vdst, vdst_orig;
96 vec_u8 vdst_mask = vec_lvsl(0, dst);
97 int element = ((unsigned long)dst & 0xf) >> 2;
98 LOAD_ZERO;
99
100 block[0] += 32; /* add 32 as a DC-level for rounding */
101
102 vtmp0 = vec_ld(0,block);
103 vtmp1 = vec_sld(vtmp0, vtmp0, 8);
104 vtmp2 = vec_ld(16,block);
105 vtmp3 = vec_sld(vtmp2, vtmp2, 8);
106 memset(block, 0, 16 * sizeof(int16_t));
107
108 VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
109 VEC_TRANSPOSE_4(va0,va1,va2,va3,vtmp0,vtmp1,vtmp2,vtmp3);
110 VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
111
112 va0 = vec_sra(va0,v6us);
113 va1 = vec_sra(va1,v6us);
114 va2 = vec_sra(va2,v6us);
115 va3 = vec_sra(va3,v6us);
116
117 VEC_LOAD_U8_ADD_S16_STORE_U8(va0);
118 dst += stride;
119 VEC_LOAD_U8_ADD_S16_STORE_U8(va1);
120 dst += stride;
121 VEC_LOAD_U8_ADD_S16_STORE_U8(va2);
122 dst += stride;
123 VEC_LOAD_U8_ADD_S16_STORE_U8(va3);
124 }
125
126 #define IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7) {\
127 /* a0 = SRC(0) + SRC(4); */ \
128 vec_s16 a0v = vec_add(s0, s4); \
129 /* a2 = SRC(0) - SRC(4); */ \
130 vec_s16 a2v = vec_sub(s0, s4); \
131 /* a4 = (SRC(2)>>1) - SRC(6); */ \
132 vec_s16 a4v = vec_sub(vec_sra(s2, onev), s6); \
133 /* a6 = (SRC(6)>>1) + SRC(2); */ \
134 vec_s16 a6v = vec_add(vec_sra(s6, onev), s2); \
135 /* b0 = a0 + a6; */ \
136 vec_s16 b0v = vec_add(a0v, a6v); \
137 /* b2 = a2 + a4; */ \
138 vec_s16 b2v = vec_add(a2v, a4v); \
139 /* b4 = a2 - a4; */ \
140 vec_s16 b4v = vec_sub(a2v, a4v); \
141 /* b6 = a0 - a6; */ \
142 vec_s16 b6v = vec_sub(a0v, a6v); \
143 /* a1 = SRC(5) - SRC(3) - SRC(7) - (SRC(7)>>1); */ \
144 /* a1 = (SRC(5)-SRC(3)) - (SRC(7) + (SRC(7)>>1)); */ \
145 vec_s16 a1v = vec_sub( vec_sub(s5, s3), vec_add(s7, vec_sra(s7, onev)) ); \
146 /* a3 = SRC(7) + SRC(1) - SRC(3) - (SRC(3)>>1); */ \
147 /* a3 = (SRC(7)+SRC(1)) - (SRC(3) + (SRC(3)>>1)); */ \
148 vec_s16 a3v = vec_sub( vec_add(s7, s1), vec_add(s3, vec_sra(s3, onev)) );\
149 /* a5 = SRC(7) - SRC(1) + SRC(5) + (SRC(5)>>1); */ \
150 /* a5 = (SRC(7)-SRC(1)) + SRC(5) + (SRC(5)>>1); */ \
151 vec_s16 a5v = vec_add( vec_sub(s7, s1), vec_add(s5, vec_sra(s5, onev)) );\
152 /* a7 = SRC(5)+SRC(3) + SRC(1) + (SRC(1)>>1); */ \
153 vec_s16 a7v = vec_add( vec_add(s5, s3), vec_add(s1, vec_sra(s1, onev)) );\
154 /* b1 = (a7>>2) + a1; */ \
155 vec_s16 b1v = vec_add( vec_sra(a7v, twov), a1v); \
156 /* b3 = a3 + (a5>>2); */ \
157 vec_s16 b3v = vec_add(a3v, vec_sra(a5v, twov)); \
158 /* b5 = (a3>>2) - a5; */ \
159 vec_s16 b5v = vec_sub( vec_sra(a3v, twov), a5v); \
160 /* b7 = a7 - (a1>>2); */ \
161 vec_s16 b7v = vec_sub( a7v, vec_sra(a1v, twov)); \
162 /* DST(0, b0 + b7); */ \
163 d0 = vec_add(b0v, b7v); \
164 /* DST(1, b2 + b5); */ \
165 d1 = vec_add(b2v, b5v); \
166 /* DST(2, b4 + b3); */ \
167 d2 = vec_add(b4v, b3v); \
168 /* DST(3, b6 + b1); */ \
169 d3 = vec_add(b6v, b1v); \
170 /* DST(4, b6 - b1); */ \
171 d4 = vec_sub(b6v, b1v); \
172 /* DST(5, b4 - b3); */ \
173 d5 = vec_sub(b4v, b3v); \
174 /* DST(6, b2 - b5); */ \
175 d6 = vec_sub(b2v, b5v); \
176 /* DST(7, b0 - b7); */ \
177 d7 = vec_sub(b0v, b7v); \
178 }
179
180 #if HAVE_BIGENDIAN
181 #define GET_2PERM(ldv, stv, d) \
182 ldv = vec_lvsl(0, d); \
183 stv = vec_lvsr(8, d);
184 #define dstv_load(d) \
185 vec_u8 hv = vec_ld( 0, d ); \
186 vec_u8 lv = vec_ld( 7, d); \
187 vec_u8 dstv = vec_perm( hv, lv, (vec_u8)perm_ldv );
188 #define dest_unligned_store(d) \
189 vec_u8 edgehv; \
190 vec_u8 bodyv = vec_perm( idstsum8, idstsum8, perm_stv ); \
191 vec_u8 edgelv = vec_perm( sel, zero_u8v, perm_stv ); \
192 lv = vec_sel( lv, bodyv, edgelv ); \
193 vec_st( lv, 7, d ); \
194 hv = vec_ld( 0, d ); \
195 edgehv = vec_perm( zero_u8v, sel, perm_stv ); \
196 hv = vec_sel( hv, bodyv, edgehv ); \
197 vec_st( hv, 0, d );
198 #else
199
200 #define GET_2PERM(ldv, stv, d) {}
201 #define dstv_load(d) vec_u8 dstv = vec_vsx_ld(0, d)
202 #define dest_unligned_store(d)\
203 vec_u8 dst8 = vec_perm((vec_u8)idstsum8, dstv, vcprm(2,3,s2,s3));\
204 vec_vsx_st(dst8, 0, d)
205 #endif /* HAVE_BIGENDIAN */
206
207 #define ALTIVEC_STORE_SUM_CLIP(dest, idctv, perm_ldv, perm_stv, sel) { \
208 /* unaligned load */ \
209 dstv_load(dest); \
210 vec_s16 idct_sh6 = vec_sra(idctv, sixv); \
211 vec_u16 dst16 = (vec_u16)VEC_MERGEH(zero_u8v, dstv); \
212 vec_s16 idstsum = vec_adds(idct_sh6, (vec_s16)dst16); \
213 vec_u8 idstsum8 = vec_packsu(zero_s16v, idstsum); \
214 /* unaligned store */ \
215 dest_unligned_store(dest);\
216 }
217
h264_idct8_add_altivec(uint8_t * dst,int16_t * dct,int stride)218 static void h264_idct8_add_altivec(uint8_t *dst, int16_t *dct, int stride)
219 {
220 vec_s16 s0, s1, s2, s3, s4, s5, s6, s7;
221 vec_s16 d0, d1, d2, d3, d4, d5, d6, d7;
222 vec_s16 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;
223
224 vec_u8 perm_ldv, perm_stv;
225 GET_2PERM(perm_ldv, perm_stv, dst);
226
227 const vec_u16 onev = vec_splat_u16(1);
228 const vec_u16 twov = vec_splat_u16(2);
229 const vec_u16 sixv = vec_splat_u16(6);
230
231 const vec_u8 sel = (vec_u8) {0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1};
232 LOAD_ZERO;
233
234 dct[0] += 32; // rounding for the >>6 at the end
235
236 s0 = vec_ld(0x00, (int16_t*)dct);
237 s1 = vec_ld(0x10, (int16_t*)dct);
238 s2 = vec_ld(0x20, (int16_t*)dct);
239 s3 = vec_ld(0x30, (int16_t*)dct);
240 s4 = vec_ld(0x40, (int16_t*)dct);
241 s5 = vec_ld(0x50, (int16_t*)dct);
242 s6 = vec_ld(0x60, (int16_t*)dct);
243 s7 = vec_ld(0x70, (int16_t*)dct);
244 memset(dct, 0, 64 * sizeof(int16_t));
245
246 IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,
247 d0, d1, d2, d3, d4, d5, d6, d7);
248
249 TRANSPOSE8( d0, d1, d2, d3, d4, d5, d6, d7 );
250
251 IDCT8_1D_ALTIVEC(d0, d1, d2, d3, d4, d5, d6, d7,
252 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);
253
254 ALTIVEC_STORE_SUM_CLIP(&dst[0*stride], idct0, perm_ldv, perm_stv, sel);
255 ALTIVEC_STORE_SUM_CLIP(&dst[1*stride], idct1, perm_ldv, perm_stv, sel);
256 ALTIVEC_STORE_SUM_CLIP(&dst[2*stride], idct2, perm_ldv, perm_stv, sel);
257 ALTIVEC_STORE_SUM_CLIP(&dst[3*stride], idct3, perm_ldv, perm_stv, sel);
258 ALTIVEC_STORE_SUM_CLIP(&dst[4*stride], idct4, perm_ldv, perm_stv, sel);
259 ALTIVEC_STORE_SUM_CLIP(&dst[5*stride], idct5, perm_ldv, perm_stv, sel);
260 ALTIVEC_STORE_SUM_CLIP(&dst[6*stride], idct6, perm_ldv, perm_stv, sel);
261 ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
262 }
263
264 #if HAVE_BIGENDIAN
265 #define DST_LD vec_ld
266 #else
267 #define DST_LD vec_vsx_ld
268 #endif
h264_idct_dc_add_internal(uint8_t * dst,int16_t * block,int stride,int size)269 static av_always_inline void h264_idct_dc_add_internal(uint8_t *dst, int16_t *block, int stride, int size)
270 {
271 vec_s16 dc16;
272 vec_u8 dcplus, dcminus, v0, v1, v2, v3, aligner;
273 vec_s32 v_dc32;
274 LOAD_ZERO;
275 DECLARE_ALIGNED(16, int, dc);
276 int i;
277
278 dc = (block[0] + 32) >> 6;
279 block[0] = 0;
280 v_dc32 = vec_lde(0, &dc);
281 dc16 = VEC_SPLAT16((vec_s16)v_dc32, 1);
282
283 if (size == 4)
284 dc16 = VEC_SLD16(dc16, zero_s16v, 8);
285 dcplus = vec_packsu(dc16, zero_s16v);
286 dcminus = vec_packsu(vec_sub(zero_s16v, dc16), zero_s16v);
287
288 #if HAVE_BIGENDIAN
289 aligner = vec_lvsr(0, dst);
290 dcplus = vec_perm(dcplus, dcplus, aligner);
291 dcminus = vec_perm(dcminus, dcminus, aligner);
292 #endif
293
294 for (i = 0; i < size; i += 4) {
295 v0 = DST_LD(0, dst+0*stride);
296 v1 = DST_LD(0, dst+1*stride);
297 v2 = DST_LD(0, dst+2*stride);
298 v3 = DST_LD(0, dst+3*stride);
299
300 v0 = vec_adds(v0, dcplus);
301 v1 = vec_adds(v1, dcplus);
302 v2 = vec_adds(v2, dcplus);
303 v3 = vec_adds(v3, dcplus);
304
305 v0 = vec_subs(v0, dcminus);
306 v1 = vec_subs(v1, dcminus);
307 v2 = vec_subs(v2, dcminus);
308 v3 = vec_subs(v3, dcminus);
309
310 VEC_ST(v0, 0, dst+0*stride);
311 VEC_ST(v1, 0, dst+1*stride);
312 VEC_ST(v2, 0, dst+2*stride);
313 VEC_ST(v3, 0, dst+3*stride);
314
315 dst += 4*stride;
316 }
317 }
318
h264_idct_dc_add_altivec(uint8_t * dst,int16_t * block,int stride)319 static void h264_idct_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
320 {
321 h264_idct_dc_add_internal(dst, block, stride, 4);
322 }
323
h264_idct8_dc_add_altivec(uint8_t * dst,int16_t * block,int stride)324 static void h264_idct8_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
325 {
326 h264_idct_dc_add_internal(dst, block, stride, 8);
327 }
328
h264_idct_add16_altivec(uint8_t * dst,const int * block_offset,int16_t * block,int stride,const uint8_t nnzc[15* 8])329 static void h264_idct_add16_altivec(uint8_t *dst, const int *block_offset,
330 int16_t *block, int stride,
331 const uint8_t nnzc[15 * 8])
332 {
333 int i;
334 for(i=0; i<16; i++){
335 int nnz = nnzc[ scan8[i] ];
336 if(nnz){
337 if(nnz==1 && block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
338 else h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
339 }
340 }
341 }
342
h264_idct_add16intra_altivec(uint8_t * dst,const int * block_offset,int16_t * block,int stride,const uint8_t nnzc[15* 8])343 static void h264_idct_add16intra_altivec(uint8_t *dst, const int *block_offset,
344 int16_t *block, int stride,
345 const uint8_t nnzc[15 * 8])
346 {
347 int i;
348 for(i=0; i<16; i++){
349 if(nnzc[ scan8[i] ]) h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
350 else if(block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
351 }
352 }
353
h264_idct8_add4_altivec(uint8_t * dst,const int * block_offset,int16_t * block,int stride,const uint8_t nnzc[15* 8])354 static void h264_idct8_add4_altivec(uint8_t *dst, const int *block_offset,
355 int16_t *block, int stride,
356 const uint8_t nnzc[15 * 8])
357 {
358 int i;
359 for(i=0; i<16; i+=4){
360 int nnz = nnzc[ scan8[i] ];
361 if(nnz){
362 if(nnz==1 && block[i*16]) h264_idct8_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
363 else h264_idct8_add_altivec(dst + block_offset[i], block + i*16, stride);
364 }
365 }
366 }
367
h264_idct_add8_altivec(uint8_t ** dest,const int * block_offset,int16_t * block,int stride,const uint8_t nnzc[15* 8])368 static void h264_idct_add8_altivec(uint8_t **dest, const int *block_offset,
369 int16_t *block, int stride,
370 const uint8_t nnzc[15 * 8])
371 {
372 int i, j;
373 for (j = 1; j < 3; j++) {
374 for(i = j * 16; i < j * 16 + 4; i++){
375 if(nnzc[ scan8[i] ])
376 h264_idct_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
377 else if(block[i*16])
378 h264_idct_dc_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
379 }
380 }
381 }
382
383 #define transpose4x16(r0, r1, r2, r3) { \
384 register vec_u8 r4; \
385 register vec_u8 r5; \
386 register vec_u8 r6; \
387 register vec_u8 r7; \
388 \
389 r4 = vec_mergeh(r0, r2); /*0, 2 set 0*/ \
390 r5 = vec_mergel(r0, r2); /*0, 2 set 1*/ \
391 r6 = vec_mergeh(r1, r3); /*1, 3 set 0*/ \
392 r7 = vec_mergel(r1, r3); /*1, 3 set 1*/ \
393 \
394 r0 = vec_mergeh(r4, r6); /*all set 0*/ \
395 r1 = vec_mergel(r4, r6); /*all set 1*/ \
396 r2 = vec_mergeh(r5, r7); /*all set 2*/ \
397 r3 = vec_mergel(r5, r7); /*all set 3*/ \
398 }
399
write16x4(uint8_t * dst,int dst_stride,register vec_u8 r0,register vec_u8 r1,register vec_u8 r2,register vec_u8 r3)400 static inline void write16x4(uint8_t *dst, int dst_stride,
401 register vec_u8 r0, register vec_u8 r1,
402 register vec_u8 r2, register vec_u8 r3) {
403 DECLARE_ALIGNED(16, unsigned char, result)[64];
404 uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst;
405 int int_dst_stride = dst_stride/4;
406
407 vec_st(r0, 0, result);
408 vec_st(r1, 16, result);
409 vec_st(r2, 32, result);
410 vec_st(r3, 48, result);
411 /* FIXME: there has to be a better way!!!! */
412 *dst_int = *src_int;
413 *(dst_int+ int_dst_stride) = *(src_int + 1);
414 *(dst_int+ 2*int_dst_stride) = *(src_int + 2);
415 *(dst_int+ 3*int_dst_stride) = *(src_int + 3);
416 *(dst_int+ 4*int_dst_stride) = *(src_int + 4);
417 *(dst_int+ 5*int_dst_stride) = *(src_int + 5);
418 *(dst_int+ 6*int_dst_stride) = *(src_int + 6);
419 *(dst_int+ 7*int_dst_stride) = *(src_int + 7);
420 *(dst_int+ 8*int_dst_stride) = *(src_int + 8);
421 *(dst_int+ 9*int_dst_stride) = *(src_int + 9);
422 *(dst_int+10*int_dst_stride) = *(src_int + 10);
423 *(dst_int+11*int_dst_stride) = *(src_int + 11);
424 *(dst_int+12*int_dst_stride) = *(src_int + 12);
425 *(dst_int+13*int_dst_stride) = *(src_int + 13);
426 *(dst_int+14*int_dst_stride) = *(src_int + 14);
427 *(dst_int+15*int_dst_stride) = *(src_int + 15);
428 }
429
430 /** @brief performs a 6x16 transpose of data in src, and stores it to dst
431 @todo FIXME: see if we can't spare some vec_lvsl() by them factorizing
432 out of unaligned_load() */
433 #define readAndTranspose16x6(src, src_stride, r8, r9, r10, r11, r12, r13) {\
434 register vec_u8 r0 = unaligned_load(0, src); \
435 register vec_u8 r1 = unaligned_load( src_stride, src); \
436 register vec_u8 r2 = unaligned_load(2* src_stride, src); \
437 register vec_u8 r3 = unaligned_load(3* src_stride, src); \
438 register vec_u8 r4 = unaligned_load(4* src_stride, src); \
439 register vec_u8 r5 = unaligned_load(5* src_stride, src); \
440 register vec_u8 r6 = unaligned_load(6* src_stride, src); \
441 register vec_u8 r7 = unaligned_load(7* src_stride, src); \
442 register vec_u8 r14 = unaligned_load(14*src_stride, src); \
443 register vec_u8 r15 = unaligned_load(15*src_stride, src); \
444 \
445 r8 = unaligned_load( 8*src_stride, src); \
446 r9 = unaligned_load( 9*src_stride, src); \
447 r10 = unaligned_load(10*src_stride, src); \
448 r11 = unaligned_load(11*src_stride, src); \
449 r12 = unaligned_load(12*src_stride, src); \
450 r13 = unaligned_load(13*src_stride, src); \
451 \
452 /*Merge first pairs*/ \
453 r0 = vec_mergeh(r0, r8); /*0, 8*/ \
454 r1 = vec_mergeh(r1, r9); /*1, 9*/ \
455 r2 = vec_mergeh(r2, r10); /*2,10*/ \
456 r3 = vec_mergeh(r3, r11); /*3,11*/ \
457 r4 = vec_mergeh(r4, r12); /*4,12*/ \
458 r5 = vec_mergeh(r5, r13); /*5,13*/ \
459 r6 = vec_mergeh(r6, r14); /*6,14*/ \
460 r7 = vec_mergeh(r7, r15); /*7,15*/ \
461 \
462 /*Merge second pairs*/ \
463 r8 = vec_mergeh(r0, r4); /*0,4, 8,12 set 0*/ \
464 r9 = vec_mergel(r0, r4); /*0,4, 8,12 set 1*/ \
465 r10 = vec_mergeh(r1, r5); /*1,5, 9,13 set 0*/ \
466 r11 = vec_mergel(r1, r5); /*1,5, 9,13 set 1*/ \
467 r12 = vec_mergeh(r2, r6); /*2,6,10,14 set 0*/ \
468 r13 = vec_mergel(r2, r6); /*2,6,10,14 set 1*/ \
469 r14 = vec_mergeh(r3, r7); /*3,7,11,15 set 0*/ \
470 r15 = vec_mergel(r3, r7); /*3,7,11,15 set 1*/ \
471 \
472 /*Third merge*/ \
473 r0 = vec_mergeh(r8, r12); /*0,2,4,6,8,10,12,14 set 0*/ \
474 r1 = vec_mergel(r8, r12); /*0,2,4,6,8,10,12,14 set 1*/ \
475 r2 = vec_mergeh(r9, r13); /*0,2,4,6,8,10,12,14 set 2*/ \
476 r4 = vec_mergeh(r10, r14); /*1,3,5,7,9,11,13,15 set 0*/ \
477 r5 = vec_mergel(r10, r14); /*1,3,5,7,9,11,13,15 set 1*/ \
478 r6 = vec_mergeh(r11, r15); /*1,3,5,7,9,11,13,15 set 2*/ \
479 /* Don't need to compute 3 and 7*/ \
480 \
481 /*Final merge*/ \
482 r8 = vec_mergeh(r0, r4); /*all set 0*/ \
483 r9 = vec_mergel(r0, r4); /*all set 1*/ \
484 r10 = vec_mergeh(r1, r5); /*all set 2*/ \
485 r11 = vec_mergel(r1, r5); /*all set 3*/ \
486 r12 = vec_mergeh(r2, r6); /*all set 4*/ \
487 r13 = vec_mergel(r2, r6); /*all set 5*/ \
488 /* Don't need to compute 14 and 15*/ \
489 \
490 }
491
492 // out: o = |x-y| < a
diff_lt_altivec(register vec_u8 x,register vec_u8 y,register vec_u8 a)493 static inline vec_u8 diff_lt_altivec ( register vec_u8 x,
494 register vec_u8 y,
495 register vec_u8 a) {
496
497 register vec_u8 diff = vec_subs(x, y);
498 register vec_u8 diffneg = vec_subs(y, x);
499 register vec_u8 o = vec_or(diff, diffneg); /* |x-y| */
500 o = (vec_u8)vec_cmplt(o, a);
501 return o;
502 }
503
h264_deblock_mask(register vec_u8 p0,register vec_u8 p1,register vec_u8 q0,register vec_u8 q1,register vec_u8 alpha,register vec_u8 beta)504 static inline vec_u8 h264_deblock_mask ( register vec_u8 p0,
505 register vec_u8 p1,
506 register vec_u8 q0,
507 register vec_u8 q1,
508 register vec_u8 alpha,
509 register vec_u8 beta) {
510
511 register vec_u8 mask;
512 register vec_u8 tempmask;
513
514 mask = diff_lt_altivec(p0, q0, alpha);
515 tempmask = diff_lt_altivec(p1, p0, beta);
516 mask = vec_and(mask, tempmask);
517 tempmask = diff_lt_altivec(q1, q0, beta);
518 mask = vec_and(mask, tempmask);
519
520 return mask;
521 }
522
523 // out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
h264_deblock_q1(register vec_u8 p0,register vec_u8 p1,register vec_u8 p2,register vec_u8 q0,register vec_u8 tc0)524 static inline vec_u8 h264_deblock_q1(register vec_u8 p0,
525 register vec_u8 p1,
526 register vec_u8 p2,
527 register vec_u8 q0,
528 register vec_u8 tc0) {
529
530 register vec_u8 average = vec_avg(p0, q0);
531 register vec_u8 temp;
532 register vec_u8 unclipped;
533 register vec_u8 ones;
534 register vec_u8 max;
535 register vec_u8 min;
536 register vec_u8 newp1;
537
538 temp = vec_xor(average, p2);
539 average = vec_avg(average, p2); /*avg(p2, avg(p0, q0)) */
540 ones = vec_splat_u8(1);
541 temp = vec_and(temp, ones); /*(p2^avg(p0, q0)) & 1 */
542 unclipped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */
543 max = vec_adds(p1, tc0);
544 min = vec_subs(p1, tc0);
545 newp1 = vec_max(min, unclipped);
546 newp1 = vec_min(max, newp1);
547 return newp1;
548 }
549
550 #define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) { \
551 \
552 const vec_u8 A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4)); \
553 \
554 register vec_u8 pq0bit = vec_xor(p0,q0); \
555 register vec_u8 q1minus; \
556 register vec_u8 p0minus; \
557 register vec_u8 stage1; \
558 register vec_u8 stage2; \
559 register vec_u8 vec160; \
560 register vec_u8 delta; \
561 register vec_u8 deltaneg; \
562 \
563 q1minus = vec_nor(q1, q1); /* 255 - q1 */ \
564 stage1 = vec_avg(p1, q1minus); /* (p1 - q1 + 256)>>1 */ \
565 stage2 = vec_sr(stage1, vec_splat_u8(1)); /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */ \
566 p0minus = vec_nor(p0, p0); /* 255 - p0 */ \
567 stage1 = vec_avg(q0, p0minus); /* (q0 - p0 + 256)>>1 */ \
568 pq0bit = vec_and(pq0bit, vec_splat_u8(1)); \
569 stage2 = vec_avg(stage2, pq0bit); /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */ \
570 stage2 = vec_adds(stage2, stage1); /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */ \
571 vec160 = vec_ld(0, &A0v); \
572 deltaneg = vec_subs(vec160, stage2); /* -d */ \
573 delta = vec_subs(stage2, vec160); /* d */ \
574 deltaneg = vec_min(tc0masked, deltaneg); \
575 delta = vec_min(tc0masked, delta); \
576 p0 = vec_subs(p0, deltaneg); \
577 q0 = vec_subs(q0, delta); \
578 p0 = vec_adds(p0, delta); \
579 q0 = vec_adds(q0, deltaneg); \
580 }
581
582 #define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) { \
583 DECLARE_ALIGNED(16, unsigned char, temp)[16]; \
584 register vec_u8 alphavec; \
585 register vec_u8 betavec; \
586 register vec_u8 mask; \
587 register vec_u8 p1mask; \
588 register vec_u8 q1mask; \
589 register vector signed char tc0vec; \
590 register vec_u8 finaltc0; \
591 register vec_u8 tc0masked; \
592 register vec_u8 newp1; \
593 register vec_u8 newq1; \
594 \
595 temp[0] = alpha; \
596 temp[1] = beta; \
597 alphavec = vec_ld(0, temp); \
598 betavec = vec_splat(alphavec, 0x1); \
599 alphavec = vec_splat(alphavec, 0x0); \
600 mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */ \
601 \
602 AV_COPY32(temp, tc0); \
603 tc0vec = vec_ld(0, (signed char*)temp); \
604 tc0vec = vec_mergeh(tc0vec, tc0vec); \
605 tc0vec = vec_mergeh(tc0vec, tc0vec); \
606 mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1))); /* if tc0[i] >= 0 */ \
607 finaltc0 = vec_and((vec_u8)tc0vec, mask); /* tc = tc0 */ \
608 \
609 p1mask = diff_lt_altivec(p2, p0, betavec); \
610 p1mask = vec_and(p1mask, mask); /* if ( |p2 - p0| < beta) */ \
611 tc0masked = vec_and(p1mask, (vec_u8)tc0vec); \
612 finaltc0 = vec_sub(finaltc0, p1mask); /* tc++ */ \
613 newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked); \
614 /*end if*/ \
615 \
616 q1mask = diff_lt_altivec(q2, q0, betavec); \
617 q1mask = vec_and(q1mask, mask); /* if ( |q2 - q0| < beta ) */\
618 tc0masked = vec_and(q1mask, (vec_u8)tc0vec); \
619 finaltc0 = vec_sub(finaltc0, q1mask); /* tc++ */ \
620 newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked); \
621 /*end if*/ \
622 \
623 h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0); \
624 p1 = newp1; \
625 q1 = newq1; \
626 }
627
h264_v_loop_filter_luma_altivec(uint8_t * pix,ptrdiff_t stride,int alpha,int beta,int8_t * tc0)628 static void h264_v_loop_filter_luma_altivec(uint8_t *pix, ptrdiff_t stride, int alpha, int beta, int8_t *tc0) {
629
630 if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0) {
631 register vec_u8 p2 = vec_ld(-3*stride, pix);
632 register vec_u8 p1 = vec_ld(-2*stride, pix);
633 register vec_u8 p0 = vec_ld(-1*stride, pix);
634 register vec_u8 q0 = vec_ld(0, pix);
635 register vec_u8 q1 = vec_ld(stride, pix);
636 register vec_u8 q2 = vec_ld(2*stride, pix);
637 h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0);
638 vec_st(p1, -2*stride, pix);
639 vec_st(p0, -1*stride, pix);
640 vec_st(q0, 0, pix);
641 vec_st(q1, stride, pix);
642 }
643 }
644
h264_h_loop_filter_luma_altivec(uint8_t * pix,ptrdiff_t stride,int alpha,int beta,int8_t * tc0)645 static void h264_h_loop_filter_luma_altivec(uint8_t *pix, ptrdiff_t stride, int alpha, int beta, int8_t *tc0) {
646
647 register vec_u8 line0, line1, line2, line3, line4, line5;
648 if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0)
649 return;
650 readAndTranspose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5);
651 h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0);
652 transpose4x16(line1, line2, line3, line4);
653 write16x4(pix-2, stride, line1, line2, line3, line4);
654 }
655
656 static av_always_inline
weight_h264_W_altivec(uint8_t * block,int stride,int height,int log2_denom,int weight,int offset,int w)657 void weight_h264_W_altivec(uint8_t *block, int stride, int height,
658 int log2_denom, int weight, int offset, int w)
659 {
660 int y, aligned;
661 vec_u8 vblock;
662 vec_s16 vtemp, vweight, voffset, v0, v1;
663 vec_u16 vlog2_denom;
664 DECLARE_ALIGNED(16, int32_t, temp)[4];
665 LOAD_ZERO;
666
667 offset <<= log2_denom;
668 if(log2_denom) offset += 1<<(log2_denom-1);
669 temp[0] = log2_denom;
670 temp[1] = weight;
671 temp[2] = offset;
672
673 vtemp = (vec_s16)vec_ld(0, temp);
674 #if !HAVE_BIGENDIAN
675 vtemp =(vec_s16)vec_perm(vtemp, vtemp, vcswapi2s(0,1,2,3));
676 #endif
677 vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
678 vweight = vec_splat(vtemp, 3);
679 voffset = vec_splat(vtemp, 5);
680 aligned = !((unsigned long)block & 0xf);
681
682 for (y = 0; y < height; y++) {
683 vblock = vec_ld(0, block);
684
685 v0 = (vec_s16)VEC_MERGEH(zero_u8v, vblock);
686 v1 = (vec_s16)VEC_MERGEL(zero_u8v, vblock);
687
688 if (w == 16 || aligned) {
689 v0 = vec_mladd(v0, vweight, zero_s16v);
690 v0 = vec_adds(v0, voffset);
691 v0 = vec_sra(v0, vlog2_denom);
692 }
693 if (w == 16 || !aligned) {
694 v1 = vec_mladd(v1, vweight, zero_s16v);
695 v1 = vec_adds(v1, voffset);
696 v1 = vec_sra(v1, vlog2_denom);
697 }
698 vblock = vec_packsu(v0, v1);
699 vec_st(vblock, 0, block);
700
701 block += stride;
702 }
703 }
704
705 static av_always_inline
biweight_h264_W_altivec(uint8_t * dst,uint8_t * src,int stride,int height,int log2_denom,int weightd,int weights,int offset,int w)706 void biweight_h264_W_altivec(uint8_t *dst, uint8_t *src, int stride, int height,
707 int log2_denom, int weightd, int weights, int offset, int w)
708 {
709 int y, dst_aligned, src_aligned;
710 vec_u8 vsrc, vdst;
711 vec_s16 vtemp, vweights, vweightd, voffset, v0, v1, v2, v3;
712 vec_u16 vlog2_denom;
713 DECLARE_ALIGNED(16, int32_t, temp)[4];
714 LOAD_ZERO;
715
716 offset = ((offset + 1) | 1) << log2_denom;
717 temp[0] = log2_denom+1;
718 temp[1] = weights;
719 temp[2] = weightd;
720 temp[3] = offset;
721
722 vtemp = (vec_s16)vec_ld(0, temp);
723 #if !HAVE_BIGENDIAN
724 vtemp =(vec_s16)vec_perm(vtemp, vtemp, vcswapi2s(0,1,2,3));
725 #endif
726 vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
727 vweights = vec_splat(vtemp, 3);
728 vweightd = vec_splat(vtemp, 5);
729 voffset = vec_splat(vtemp, 7);
730 dst_aligned = !((unsigned long)dst & 0xf);
731 src_aligned = !((unsigned long)src & 0xf);
732
733 for (y = 0; y < height; y++) {
734 vdst = vec_ld(0, dst);
735 vsrc = vec_ld(0, src);
736
737 v0 = (vec_s16)VEC_MERGEH(zero_u8v, vdst);
738 v1 = (vec_s16)VEC_MERGEL(zero_u8v, vdst);
739 v2 = (vec_s16)VEC_MERGEH(zero_u8v, vsrc);
740 v3 = (vec_s16)VEC_MERGEL(zero_u8v, vsrc);
741
742 if (w == 8) {
743 if (src_aligned)
744 v3 = v2;
745 else
746 v2 = v3;
747 }
748
749 if (w == 16 || dst_aligned) {
750 v0 = vec_mladd(v0, vweightd, zero_s16v);
751 v2 = vec_mladd(v2, vweights, zero_s16v);
752
753 v0 = vec_adds(v0, voffset);
754 v0 = vec_adds(v0, v2);
755 v0 = vec_sra(v0, vlog2_denom);
756 }
757 if (w == 16 || !dst_aligned) {
758 v1 = vec_mladd(v1, vweightd, zero_s16v);
759 v3 = vec_mladd(v3, vweights, zero_s16v);
760
761 v1 = vec_adds(v1, voffset);
762 v1 = vec_adds(v1, v3);
763 v1 = vec_sra(v1, vlog2_denom);
764 }
765 vdst = vec_packsu(v0, v1);
766 vec_st(vdst, 0, dst);
767
768 dst += stride;
769 src += stride;
770 }
771 }
772
773 #define H264_WEIGHT(W) \
774 static void weight_h264_pixels ## W ## _altivec(uint8_t *block, ptrdiff_t stride, int height, \
775 int log2_denom, int weight, int offset) \
776 { \
777 weight_h264_W_altivec(block, stride, height, log2_denom, weight, offset, W); \
778 }\
779 static void biweight_h264_pixels ## W ## _altivec(uint8_t *dst, uint8_t *src, ptrdiff_t stride, int height, \
780 int log2_denom, int weightd, int weights, int offset) \
781 { \
782 biweight_h264_W_altivec(dst, src, stride, height, log2_denom, weightd, weights, offset, W); \
783 }
784
785 H264_WEIGHT(16)
786 H264_WEIGHT( 8)
787 #endif /* HAVE_ALTIVEC */
788
ff_h264dsp_init_ppc(H264DSPContext * c,const int bit_depth,const int chroma_format_idc)789 av_cold void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
790 const int chroma_format_idc)
791 {
792 #if HAVE_ALTIVEC
793 if (!PPC_ALTIVEC(av_get_cpu_flags()))
794 return;
795
796 if (bit_depth == 8) {
797 c->h264_idct_add = h264_idct_add_altivec;
798 if (chroma_format_idc <= 1)
799 c->h264_idct_add8 = h264_idct_add8_altivec;
800 c->h264_idct_add16 = h264_idct_add16_altivec;
801 c->h264_idct_add16intra = h264_idct_add16intra_altivec;
802 c->h264_idct_dc_add= h264_idct_dc_add_altivec;
803 c->h264_idct8_dc_add = h264_idct8_dc_add_altivec;
804 c->h264_idct8_add = h264_idct8_add_altivec;
805 c->h264_idct8_add4 = h264_idct8_add4_altivec;
806 c->h264_v_loop_filter_luma= h264_v_loop_filter_luma_altivec;
807 c->h264_h_loop_filter_luma= h264_h_loop_filter_luma_altivec;
808
809 c->weight_h264_pixels_tab[0] = weight_h264_pixels16_altivec;
810 c->weight_h264_pixels_tab[1] = weight_h264_pixels8_altivec;
811 c->biweight_h264_pixels_tab[0] = biweight_h264_pixels16_altivec;
812 c->biweight_h264_pixels_tab[1] = biweight_h264_pixels8_altivec;
813 }
814 #endif /* HAVE_ALTIVEC */
815 }
816