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yuv2rgb_altivec.c
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1 /*
2  * AltiVec acceleration for colorspace conversion
3  *
4  * copyright (C) 2004 Marc Hoffman <marc.hoffman@analog.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /*
24  * Convert I420 YV12 to RGB in various formats,
25  * it rejects images that are not in 420 formats,
26  * it rejects images that don't have widths of multiples of 16,
27  * it rejects images that don't have heights of multiples of 2.
28  * Reject defers to C simulation code.
29  *
30  * Lots of optimizations to be done here.
31  *
32  * 1. Need to fix saturation code. I just couldn't get it to fly with packs
33  * and adds, so we currently use max/min to clip.
34  *
35  * 2. The inefficient use of chroma loading needs a bit of brushing up.
36  *
37  * 3. Analysis of pipeline stalls needs to be done. Use shark to identify
38  * pipeline stalls.
39  *
40  *
41  * MODIFIED to calculate coeffs from currently selected color space.
42  * MODIFIED core to be a macro where you specify the output format.
43  * ADDED UYVY conversion which is never called due to some thing in swscale.
44  * CORRECTED algorithim selection to be strict on input formats.
45  * ADDED runtime detection of AltiVec.
46  *
47  * ADDED altivec_yuv2packedX vertical scl + RGB converter
48  *
49  * March 27,2004
50  * PERFORMANCE ANALYSIS
51  *
52  * The C version uses 25% of the processor or ~250Mips for D1 video rawvideo
53  * used as test.
54  * The AltiVec version uses 10% of the processor or ~100Mips for D1 video
55  * same sequence.
56  *
57  * 720 * 480 * 30 ~10MPS
58  *
59  * so we have roughly 10 clocks per pixel. This is too high, something has
60  * to be wrong.
61  *
62  * OPTIMIZED clip codes to utilize vec_max and vec_packs removing the
63  * need for vec_min.
64  *
65  * OPTIMIZED DST OUTPUT cache/DMA controls. We are pretty much guaranteed to
66  * have the input video frame, it was just decompressed so it probably resides
67  * in L1 caches. However, we are creating the output video stream. This needs
68  * to use the DSTST instruction to optimize for the cache. We couple this with
69  * the fact that we are not going to be visiting the input buffer again so we
70  * mark it Least Recently Used. This shaves 25% of the processor cycles off.
71  *
72  * Now memcpy is the largest mips consumer in the system, probably due
73  * to the inefficient X11 stuff.
74  *
75  * GL libraries seem to be very slow on this machine 1.33Ghz PB running
76  * Jaguar, this is not the case for my 1Ghz PB. I thought it might be
77  * a versioning issue, however I have libGL.1.2.dylib for both
78  * machines. (We need to figure this out now.)
79  *
80  * GL2 libraries work now with patch for RGB32.
81  *
82  * NOTE: quartz vo driver ARGB32_to_RGB24 consumes 30% of the processor.
83  *
84  * Integrated luma prescaling adjustment for saturation/contrast/brightness
85  * adjustment.
86  */
87 
88 #include <stdio.h>
89 #include <stdlib.h>
90 #include <string.h>
91 #include <inttypes.h>
92 #include <assert.h>
93 
94 #include "config.h"
95 #include "libswscale/rgb2rgb.h"
96 #include "libswscale/swscale.h"
97 #include "libswscale/swscale_internal.h"
98 #include "libavutil/attributes.h"
99 #include "libavutil/cpu.h"
100 #include "libavutil/pixdesc.h"
101 #include "yuv2rgb_altivec.h"
102 
103 #if HAVE_ALTIVEC
104 
105 #undef PROFILE_THE_BEAST
106 #undef INC_SCALING
107 
108 typedef unsigned char ubyte;
109 typedef signed char sbyte;
110 
111 /* RGB interleaver, 16 planar pels 8-bit samples per channel in
112  * homogeneous vector registers x0,x1,x2 are interleaved with the
113  * following technique:
114  *
115  * o0 = vec_mergeh(x0, x1);
116  * o1 = vec_perm(o0, x2, perm_rgb_0);
117  * o2 = vec_perm(o0, x2, perm_rgb_1);
118  * o3 = vec_mergel(x0, x1);
119  * o4 = vec_perm(o3, o2, perm_rgb_2);
120  * o5 = vec_perm(o3, o2, perm_rgb_3);
121  *
122  * perm_rgb_0: o0(RG).h v1(B) --> o1*
123  * 0 1 2 3 4
124  * rgbr|gbrg|brgb|rgbr
125  * 0010 0100 1001 0010
126  * 0102 3145 2673 894A
127  *
128  * perm_rgb_1: o0(RG).h v1(B) --> o2
129  * 0 1 2 3 4
130  * gbrg|brgb|bbbb|bbbb
131  * 0100 1001 1111 1111
132  * B5CD 6EF7 89AB CDEF
133  *
134  * perm_rgb_2: o3(RG).l o2(rgbB.l) --> o4*
135  * 0 1 2 3 4
136  * gbrg|brgb|rgbr|gbrg
137  * 1111 1111 0010 0100
138  * 89AB CDEF 0182 3945
139  *
140  * perm_rgb_2: o3(RG).l o2(rgbB.l) ---> o5*
141  * 0 1 2 3 4
142  * brgb|rgbr|gbrg|brgb
143  * 1001 0010 0100 1001
144  * a67b 89cA BdCD eEFf
145  *
146  */
147 static const vector unsigned char
148  perm_rgb_0 = { 0x00, 0x01, 0x10, 0x02, 0x03, 0x11, 0x04, 0x05,
149  0x12, 0x06, 0x07, 0x13, 0x08, 0x09, 0x14, 0x0a },
150  perm_rgb_1 = { 0x0b, 0x15, 0x0c, 0x0d, 0x16, 0x0e, 0x0f, 0x17,
151  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f },
152  perm_rgb_2 = { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
153  0x00, 0x01, 0x18, 0x02, 0x03, 0x19, 0x04, 0x05 },
154  perm_rgb_3 = { 0x1a, 0x06, 0x07, 0x1b, 0x08, 0x09, 0x1c, 0x0a,
155  0x0b, 0x1d, 0x0c, 0x0d, 0x1e, 0x0e, 0x0f, 0x1f };
156 
157 #define vec_merge3(x2, x1, x0, y0, y1, y2) \
158  do { \
159  __typeof__(x0) o0, o2, o3; \
160  o0 = vec_mergeh(x0, x1); \
161  y0 = vec_perm(o0, x2, perm_rgb_0); \
162  o2 = vec_perm(o0, x2, perm_rgb_1); \
163  o3 = vec_mergel(x0, x1); \
164  y1 = vec_perm(o3, o2, perm_rgb_2); \
165  y2 = vec_perm(o3, o2, perm_rgb_3); \
166  } while (0)
167 
168 #define vec_mstbgr24(x0, x1, x2, ptr) \
169  do { \
170  __typeof__(x0) _0, _1, _2; \
171  vec_merge3(x0, x1, x2, _0, _1, _2); \
172  vec_st(_0, 0, ptr++); \
173  vec_st(_1, 0, ptr++); \
174  vec_st(_2, 0, ptr++); \
175  } while (0)
176 
177 #define vec_mstrgb24(x0, x1, x2, ptr) \
178  do { \
179  __typeof__(x0) _0, _1, _2; \
180  vec_merge3(x2, x1, x0, _0, _1, _2); \
181  vec_st(_0, 0, ptr++); \
182  vec_st(_1, 0, ptr++); \
183  vec_st(_2, 0, ptr++); \
184  } while (0)
185 
186 /* pack the pixels in rgb0 format
187  * msb R
188  * lsb 0
189  */
190 #define vec_mstrgb32(T, x0, x1, x2, x3, ptr) \
191  do { \
192  T _0, _1, _2, _3; \
193  _0 = vec_mergeh(x0, x1); \
194  _1 = vec_mergeh(x2, x3); \
195  _2 = (T) vec_mergeh((vector unsigned short) _0, \
196  (vector unsigned short) _1); \
197  _3 = (T) vec_mergel((vector unsigned short) _0, \
198  (vector unsigned short) _1); \
199  vec_st(_2, 0 * 16, (T *) ptr); \
200  vec_st(_3, 1 * 16, (T *) ptr); \
201  _0 = vec_mergel(x0, x1); \
202  _1 = vec_mergel(x2, x3); \
203  _2 = (T) vec_mergeh((vector unsigned short) _0, \
204  (vector unsigned short) _1); \
205  _3 = (T) vec_mergel((vector unsigned short) _0, \
206  (vector unsigned short) _1); \
207  vec_st(_2, 2 * 16, (T *) ptr); \
208  vec_st(_3, 3 * 16, (T *) ptr); \
209  ptr += 4; \
210  } while (0)
211 
212 /*
213  * 1 0 1.4021 | | Y |
214  * 1 -0.3441 -0.7142 |x| Cb|
215  * 1 1.7718 0 | | Cr|
216  *
217  *
218  * Y: [-128 127]
219  * Cb/Cr : [-128 127]
220  *
221  * typical YUV conversion works on Y: 0-255 this version has been
222  * optimized for JPEG decoding.
223  */
224 
225 #define vec_unh(x) \
226  (vector signed short) \
227  vec_perm(x, (__typeof__(x)) { 0 }, \
228  ((vector unsigned char) { \
229  0x10, 0x00, 0x10, 0x01, 0x10, 0x02, 0x10, 0x03, \
230  0x10, 0x04, 0x10, 0x05, 0x10, 0x06, 0x10, 0x07 }))
231 
232 #define vec_unl(x) \
233  (vector signed short) \
234  vec_perm(x, (__typeof__(x)) { 0 }, \
235  ((vector unsigned char) { \
236  0x10, 0x08, 0x10, 0x09, 0x10, 0x0A, 0x10, 0x0B, \
237  0x10, 0x0C, 0x10, 0x0D, 0x10, 0x0E, 0x10, 0x0F }))
238 
239 #define vec_clip_s16(x) \
240  vec_max(vec_min(x, ((vector signed short) { \
241  235, 235, 235, 235, 235, 235, 235, 235 })), \
242  ((vector signed short) { 16, 16, 16, 16, 16, 16, 16, 16 }))
243 
244 #define vec_packclp(x, y) \
245  (vector unsigned char) \
246  vec_packs((vector unsigned short) \
247  vec_max(x, ((vector signed short) { 0 })), \
248  (vector unsigned short) \
249  vec_max(y, ((vector signed short) { 0 })))
250 
251 static inline void cvtyuvtoRGB(SwsContext *c, vector signed short Y,
252  vector signed short U, vector signed short V,
253  vector signed short *R, vector signed short *G,
254  vector signed short *B)
255 {
256  vector signed short vx, ux, uvx;
257 
258  Y = vec_mradds(Y, c->CY, c->OY);
259  U = vec_sub(U, (vector signed short)
260  vec_splat((vector signed short) { 128 }, 0));
261  V = vec_sub(V, (vector signed short)
262  vec_splat((vector signed short) { 128 }, 0));
263 
264  // ux = (CBU * (u << c->CSHIFT) + 0x4000) >> 15;
265  ux = vec_sl(U, c->CSHIFT);
266  *B = vec_mradds(ux, c->CBU, Y);
267 
268  // vx = (CRV * (v << c->CSHIFT) + 0x4000) >> 15;
269  vx = vec_sl(V, c->CSHIFT);
270  *R = vec_mradds(vx, c->CRV, Y);
271 
272  // uvx = ((CGU * u) + (CGV * v)) >> 15;
273  uvx = vec_mradds(U, c->CGU, Y);
274  *G = vec_mradds(V, c->CGV, uvx);
275 }
276 
277 /*
278  * ------------------------------------------------------------------------------
279  * CS converters
280  * ------------------------------------------------------------------------------
281  */
282 
283 #define DEFCSP420_CVT(name, out_pixels) \
284 static int altivec_ ## name(SwsContext *c, const unsigned char **in, \
285  int *instrides, int srcSliceY, int srcSliceH, \
286  unsigned char **oplanes, int *outstrides) \
287 { \
288  int w = c->srcW; \
289  int h = srcSliceH; \
290  int i, j; \
291  int instrides_scl[3]; \
292  vector unsigned char y0, y1; \
293  \
294  vector signed char u, v; \
295  \
296  vector signed short Y0, Y1, Y2, Y3; \
297  vector signed short U, V; \
298  vector signed short vx, ux, uvx; \
299  vector signed short vx0, ux0, uvx0; \
300  vector signed short vx1, ux1, uvx1; \
301  vector signed short R0, G0, B0; \
302  vector signed short R1, G1, B1; \
303  vector unsigned char R, G, B; \
304  \
305  const vector unsigned char *y1ivP, *y2ivP, *uivP, *vivP; \
306  vector unsigned char align_perm; \
307  \
308  vector signed short lCY = c->CY; \
309  vector signed short lOY = c->OY; \
310  vector signed short lCRV = c->CRV; \
311  vector signed short lCBU = c->CBU; \
312  vector signed short lCGU = c->CGU; \
313  vector signed short lCGV = c->CGV; \
314  vector unsigned short lCSHIFT = c->CSHIFT; \
315  \
316  const ubyte *y1i = in[0]; \
317  const ubyte *y2i = in[0] + instrides[0]; \
318  const ubyte *ui = in[1]; \
319  const ubyte *vi = in[2]; \
320  \
321  vector unsigned char *oute, *outo; \
322  \
323  /* loop moves y{1, 2}i by w */ \
324  instrides_scl[0] = instrides[0] * 2 - w; \
325  /* loop moves ui by w / 2 */ \
326  instrides_scl[1] = instrides[1] - w / 2; \
327  /* loop moves vi by w / 2 */ \
328  instrides_scl[2] = instrides[2] - w / 2; \
329  \
330  for (i = 0; i < h / 2; i++) { \
331  oute = (vector unsigned char *)(oplanes[0] + outstrides[0] * \
332  (srcSliceY + i * 2)); \
333  outo = oute + (outstrides[0] >> 4); \
334  vec_dstst(outo, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 0); \
335  vec_dstst(oute, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 1); \
336  \
337  for (j = 0; j < w / 16; j++) { \
338  y1ivP = (const vector unsigned char *) y1i; \
339  y2ivP = (const vector unsigned char *) y2i; \
340  uivP = (const vector unsigned char *) ui; \
341  vivP = (const vector unsigned char *) vi; \
342  \
343  align_perm = vec_lvsl(0, y1i); \
344  y0 = (vector unsigned char) \
345  vec_perm(y1ivP[0], y1ivP[1], align_perm); \
346  \
347  align_perm = vec_lvsl(0, y2i); \
348  y1 = (vector unsigned char) \
349  vec_perm(y2ivP[0], y2ivP[1], align_perm); \
350  \
351  align_perm = vec_lvsl(0, ui); \
352  u = (vector signed char) \
353  vec_perm(uivP[0], uivP[1], align_perm); \
354  \
355  align_perm = vec_lvsl(0, vi); \
356  v = (vector signed char) \
357  vec_perm(vivP[0], vivP[1], align_perm); \
358  \
359  u = (vector signed char) \
360  vec_sub(u, \
361  (vector signed char) \
362  vec_splat((vector signed char) { 128 }, 0)); \
363  v = (vector signed char) \
364  vec_sub(v, \
365  (vector signed char) \
366  vec_splat((vector signed char) { 128 }, 0)); \
367  \
368  U = vec_unpackh(u); \
369  V = vec_unpackh(v); \
370  \
371  Y0 = vec_unh(y0); \
372  Y1 = vec_unl(y0); \
373  Y2 = vec_unh(y1); \
374  Y3 = vec_unl(y1); \
375  \
376  Y0 = vec_mradds(Y0, lCY, lOY); \
377  Y1 = vec_mradds(Y1, lCY, lOY); \
378  Y2 = vec_mradds(Y2, lCY, lOY); \
379  Y3 = vec_mradds(Y3, lCY, lOY); \
380  \
381  /* ux = (CBU * (u << CSHIFT) + 0x4000) >> 15 */ \
382  ux = vec_sl(U, lCSHIFT); \
383  ux = vec_mradds(ux, lCBU, (vector signed short) { 0 }); \
384  ux0 = vec_mergeh(ux, ux); \
385  ux1 = vec_mergel(ux, ux); \
386  \
387  /* vx = (CRV * (v << CSHIFT) + 0x4000) >> 15; */ \
388  vx = vec_sl(V, lCSHIFT); \
389  vx = vec_mradds(vx, lCRV, (vector signed short) { 0 }); \
390  vx0 = vec_mergeh(vx, vx); \
391  vx1 = vec_mergel(vx, vx); \
392  \
393  /* uvx = ((CGU * u) + (CGV * v)) >> 15 */ \
394  uvx = vec_mradds(U, lCGU, (vector signed short) { 0 }); \
395  uvx = vec_mradds(V, lCGV, uvx); \
396  uvx0 = vec_mergeh(uvx, uvx); \
397  uvx1 = vec_mergel(uvx, uvx); \
398  \
399  R0 = vec_add(Y0, vx0); \
400  G0 = vec_add(Y0, uvx0); \
401  B0 = vec_add(Y0, ux0); \
402  R1 = vec_add(Y1, vx1); \
403  G1 = vec_add(Y1, uvx1); \
404  B1 = vec_add(Y1, ux1); \
405  \
406  R = vec_packclp(R0, R1); \
407  G = vec_packclp(G0, G1); \
408  B = vec_packclp(B0, B1); \
409  \
410  out_pixels(R, G, B, oute); \
411  \
412  R0 = vec_add(Y2, vx0); \
413  G0 = vec_add(Y2, uvx0); \
414  B0 = vec_add(Y2, ux0); \
415  R1 = vec_add(Y3, vx1); \
416  G1 = vec_add(Y3, uvx1); \
417  B1 = vec_add(Y3, ux1); \
418  R = vec_packclp(R0, R1); \
419  G = vec_packclp(G0, G1); \
420  B = vec_packclp(B0, B1); \
421  \
422  \
423  out_pixels(R, G, B, outo); \
424  \
425  y1i += 16; \
426  y2i += 16; \
427  ui += 8; \
428  vi += 8; \
429  } \
430  \
431  ui += instrides_scl[1]; \
432  vi += instrides_scl[2]; \
433  y1i += instrides_scl[0]; \
434  y2i += instrides_scl[0]; \
435  } \
436  return srcSliceH; \
437 }
438 
439 #define out_abgr(a, b, c, ptr) \
440  vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), c, b, a, ptr)
441 #define out_bgra(a, b, c, ptr) \
442  vec_mstrgb32(__typeof__(a), c, b, a, ((__typeof__(a)) { 255 }), ptr)
443 #define out_rgba(a, b, c, ptr) \
444  vec_mstrgb32(__typeof__(a), a, b, c, ((__typeof__(a)) { 255 }), ptr)
445 #define out_argb(a, b, c, ptr) \
446  vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), a, b, c, ptr)
447 #define out_rgb24(a, b, c, ptr) vec_mstrgb24(a, b, c, ptr)
448 #define out_bgr24(a, b, c, ptr) vec_mstbgr24(a, b, c, ptr)
449 
450 DEFCSP420_CVT(yuv2_abgr, out_abgr)
451 DEFCSP420_CVT(yuv2_bgra, out_bgra)
452 DEFCSP420_CVT(yuv2_rgba, out_rgba)
453 DEFCSP420_CVT(yuv2_argb, out_argb)
454 DEFCSP420_CVT(yuv2_rgb24, out_rgb24)
455 DEFCSP420_CVT(yuv2_bgr24, out_bgr24)
456 
457 // uyvy|uyvy|uyvy|uyvy
458 // 0123 4567 89ab cdef
459 static const vector unsigned char
460  demux_u = { 0x10, 0x00, 0x10, 0x00,
461  0x10, 0x04, 0x10, 0x04,
462  0x10, 0x08, 0x10, 0x08,
463  0x10, 0x0c, 0x10, 0x0c },
464  demux_v = { 0x10, 0x02, 0x10, 0x02,
465  0x10, 0x06, 0x10, 0x06,
466  0x10, 0x0A, 0x10, 0x0A,
467  0x10, 0x0E, 0x10, 0x0E },
468  demux_y = { 0x10, 0x01, 0x10, 0x03,
469  0x10, 0x05, 0x10, 0x07,
470  0x10, 0x09, 0x10, 0x0B,
471  0x10, 0x0D, 0x10, 0x0F };
472 
473 /*
474  * this is so I can play live CCIR raw video
475  */
476 static int altivec_uyvy_rgb32(SwsContext *c, const unsigned char **in,
477  int *instrides, int srcSliceY, int srcSliceH,
478  unsigned char **oplanes, int *outstrides)
479 {
480  int w = c->srcW;
481  int h = srcSliceH;
482  int i, j;
483  vector unsigned char uyvy;
484  vector signed short Y, U, V;
485  vector signed short R0, G0, B0, R1, G1, B1;
486  vector unsigned char R, G, B;
487  vector unsigned char *out;
488  const ubyte *img;
489 
490  img = in[0];
491  out = (vector unsigned char *) (oplanes[0] + srcSliceY * outstrides[0]);
492 
493  for (i = 0; i < h; i++)
494  for (j = 0; j < w / 16; j++) {
495  uyvy = vec_ld(0, img);
496 
497  U = (vector signed short)
498  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
499  V = (vector signed short)
500  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
501  Y = (vector signed short)
502  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
503 
504  cvtyuvtoRGB(c, Y, U, V, &R0, &G0, &B0);
505 
506  uyvy = vec_ld(16, img);
507 
508  U = (vector signed short)
509  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
510  V = (vector signed short)
511  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
512  Y = (vector signed short)
513  vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
514 
515  cvtyuvtoRGB(c, Y, U, V, &R1, &G1, &B1);
516 
517  R = vec_packclp(R0, R1);
518  G = vec_packclp(G0, G1);
519  B = vec_packclp(B0, B1);
520 
521  // vec_mstbgr24 (R,G,B, out);
522  out_rgba(R, G, B, out);
523 
524  img += 32;
525  }
526  return srcSliceH;
527 }
528 
529 #endif /* HAVE_ALTIVEC */
530 
531 /* Ok currently the acceleration routine only supports
532  * inputs of widths a multiple of 16
533  * and heights a multiple 2
534  *
535  * So we just fall back to the C codes for this.
536  */
537 av_cold SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)
538 {
539 #if HAVE_ALTIVEC
540  if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
541  return NULL;
542 
543  /*
544  * and this seems not to matter too much I tried a bunch of
545  * videos with abnormal widths and MPlayer crashes elsewhere.
546  * mplayer -vo x11 -rawvideo on:w=350:h=240 raw-350x240.eyuv
547  * boom with X11 bad match.
548  *
549  */
550  if ((c->srcW & 0xf) != 0)
551  return NULL;
552 
553  switch (c->srcFormat) {
554  case AV_PIX_FMT_YUV410P:
555  case AV_PIX_FMT_YUV420P:
556  /*case IMGFMT_CLPL: ??? */
557  case AV_PIX_FMT_GRAY8:
558  case AV_PIX_FMT_NV12:
559  case AV_PIX_FMT_NV21:
560  if ((c->srcH & 0x1) != 0)
561  return NULL;
562 
563  switch (c->dstFormat) {
564  case AV_PIX_FMT_RGB24:
565  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGB24\n");
566  return altivec_yuv2_rgb24;
567  case AV_PIX_FMT_BGR24:
568  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGR24\n");
569  return altivec_yuv2_bgr24;
570  case AV_PIX_FMT_ARGB:
571  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ARGB\n");
572  return altivec_yuv2_argb;
573  case AV_PIX_FMT_ABGR:
574  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ABGR\n");
575  return altivec_yuv2_abgr;
576  case AV_PIX_FMT_RGBA:
577  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGBA\n");
578  return altivec_yuv2_rgba;
579  case AV_PIX_FMT_BGRA:
580  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGRA\n");
581  return altivec_yuv2_bgra;
582  default: return NULL;
583  }
584  break;
585 
586  case AV_PIX_FMT_UYVY422:
587  switch (c->dstFormat) {
588  case AV_PIX_FMT_BGR32:
589  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space UYVY -> RGB32\n");
590  return altivec_uyvy_rgb32;
591  default: return NULL;
592  }
593  break;
594  }
595 #endif /* HAVE_ALTIVEC */
596 
597  return NULL;
598 }
599 
600 av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c,
601  const int inv_table[4],
602  int brightness,
603  int contrast,
604  int saturation)
605 {
606 #if HAVE_ALTIVEC
607  union {
608  DECLARE_ALIGNED(16, signed short, tmp)[8];
609  vector signed short vec;
610  } buf;
611 
612  if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
613  return;
614 
615  buf.tmp[0] = ((0xffffLL) * contrast >> 8) >> 9; // cy
616  buf.tmp[1] = -256 * brightness; // oy
617  buf.tmp[2] = (inv_table[0] >> 3) * (contrast >> 16) * (saturation >> 16); // crv
618  buf.tmp[3] = (inv_table[1] >> 3) * (contrast >> 16) * (saturation >> 16); // cbu
619  buf.tmp[4] = -((inv_table[2] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgu
620  buf.tmp[5] = -((inv_table[3] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgv
621 
622  c->CSHIFT = (vector unsigned short) vec_splat_u16(2);
623  c->CY = vec_splat((vector signed short) buf.vec, 0);
624  c->OY = vec_splat((vector signed short) buf.vec, 1);
625  c->CRV = vec_splat((vector signed short) buf.vec, 2);
626  c->CBU = vec_splat((vector signed short) buf.vec, 3);
627  c->CGU = vec_splat((vector signed short) buf.vec, 4);
628  c->CGV = vec_splat((vector signed short) buf.vec, 5);
629  return;
630 #endif /* HAVE_ALTIVEC */
631 }
632 
633 #if HAVE_ALTIVEC
634 
635 static av_always_inline void yuv2packedX_altivec(SwsContext *c,
636  const int16_t *lumFilter,
637  const int16_t **lumSrc,
638  int lumFilterSize,
639  const int16_t *chrFilter,
640  const int16_t **chrUSrc,
641  const int16_t **chrVSrc,
642  int chrFilterSize,
643  const int16_t **alpSrc,
644  uint8_t *dest,
645  int dstW, int dstY,
646  enum AVPixelFormat target)
647 {
648  int i, j;
649  vector signed short X, X0, X1, Y0, U0, V0, Y1, U1, V1, U, V;
650  vector signed short R0, G0, B0, R1, G1, B1;
651 
652  vector unsigned char R, G, B;
653  vector unsigned char *out, *nout;
654 
655  vector signed short RND = vec_splat_s16(1 << 3);
656  vector unsigned short SCL = vec_splat_u16(4);
657  DECLARE_ALIGNED(16, unsigned int, scratch)[16];
658 
659  vector signed short *YCoeffs, *CCoeffs;
660 
661  YCoeffs = c->vYCoeffsBank + dstY * lumFilterSize;
662  CCoeffs = c->vCCoeffsBank + dstY * chrFilterSize;
663 
664  out = (vector unsigned char *) dest;
665 
666  for (i = 0; i < dstW; i += 16) {
667  Y0 = RND;
668  Y1 = RND;
669  /* extract 16 coeffs from lumSrc */
670  for (j = 0; j < lumFilterSize; j++) {
671  X0 = vec_ld(0, &lumSrc[j][i]);
672  X1 = vec_ld(16, &lumSrc[j][i]);
673  Y0 = vec_mradds(X0, YCoeffs[j], Y0);
674  Y1 = vec_mradds(X1, YCoeffs[j], Y1);
675  }
676 
677  U = RND;
678  V = RND;
679  /* extract 8 coeffs from U,V */
680  for (j = 0; j < chrFilterSize; j++) {
681  X = vec_ld(0, &chrUSrc[j][i / 2]);
682  U = vec_mradds(X, CCoeffs[j], U);
683  X = vec_ld(0, &chrVSrc[j][i / 2]);
684  V = vec_mradds(X, CCoeffs[j], V);
685  }
686 
687  /* scale and clip signals */
688  Y0 = vec_sra(Y0, SCL);
689  Y1 = vec_sra(Y1, SCL);
690  U = vec_sra(U, SCL);
691  V = vec_sra(V, SCL);
692 
693  Y0 = vec_clip_s16(Y0);
694  Y1 = vec_clip_s16(Y1);
695  U = vec_clip_s16(U);
696  V = vec_clip_s16(V);
697 
698  /* now we have
699  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
700  * U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
701  *
702  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
703  * U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
704  * V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
705  */
706 
707  U0 = vec_mergeh(U, U);
708  V0 = vec_mergeh(V, V);
709 
710  U1 = vec_mergel(U, U);
711  V1 = vec_mergel(V, V);
712 
713  cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
714  cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
715 
716  R = vec_packclp(R0, R1);
717  G = vec_packclp(G0, G1);
718  B = vec_packclp(B0, B1);
719 
720  switch (target) {
721  case AV_PIX_FMT_ABGR:
722  out_abgr(R, G, B, out);
723  break;
724  case AV_PIX_FMT_BGRA:
725  out_bgra(R, G, B, out);
726  break;
727  case AV_PIX_FMT_RGBA:
728  out_rgba(R, G, B, out);
729  break;
730  case AV_PIX_FMT_ARGB:
731  out_argb(R, G, B, out);
732  break;
733  case AV_PIX_FMT_RGB24:
734  out_rgb24(R, G, B, out);
735  break;
736  case AV_PIX_FMT_BGR24:
737  out_bgr24(R, G, B, out);
738  break;
739  default:
740  {
741  /* If this is reached, the caller should have called yuv2packedXinC
742  * instead. */
743  static int printed_error_message;
744  if (!printed_error_message) {
745  av_log(c, AV_LOG_ERROR,
746  "altivec_yuv2packedX doesn't support %s output\n",
747  av_get_pix_fmt_name(c->dstFormat));
748  printed_error_message = 1;
749  }
750  return;
751  }
752  }
753  }
754 
755  if (i < dstW) {
756  i -= 16;
757 
758  Y0 = RND;
759  Y1 = RND;
760  /* extract 16 coeffs from lumSrc */
761  for (j = 0; j < lumFilterSize; j++) {
762  X0 = vec_ld(0, &lumSrc[j][i]);
763  X1 = vec_ld(16, &lumSrc[j][i]);
764  Y0 = vec_mradds(X0, YCoeffs[j], Y0);
765  Y1 = vec_mradds(X1, YCoeffs[j], Y1);
766  }
767 
768  U = RND;
769  V = RND;
770  /* extract 8 coeffs from U,V */
771  for (j = 0; j < chrFilterSize; j++) {
772  X = vec_ld(0, &chrUSrc[j][i / 2]);
773  U = vec_mradds(X, CCoeffs[j], U);
774  X = vec_ld(0, &chrVSrc[j][i / 2]);
775  V = vec_mradds(X, CCoeffs[j], V);
776  }
777 
778  /* scale and clip signals */
779  Y0 = vec_sra(Y0, SCL);
780  Y1 = vec_sra(Y1, SCL);
781  U = vec_sra(U, SCL);
782  V = vec_sra(V, SCL);
783 
784  Y0 = vec_clip_s16(Y0);
785  Y1 = vec_clip_s16(Y1);
786  U = vec_clip_s16(U);
787  V = vec_clip_s16(V);
788 
789  /* now we have
790  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
791  * U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
792  *
793  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
794  * U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
795  * V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
796  */
797 
798  U0 = vec_mergeh(U, U);
799  V0 = vec_mergeh(V, V);
800 
801  U1 = vec_mergel(U, U);
802  V1 = vec_mergel(V, V);
803 
804  cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
805  cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
806 
807  R = vec_packclp(R0, R1);
808  G = vec_packclp(G0, G1);
809  B = vec_packclp(B0, B1);
810 
811  nout = (vector unsigned char *) scratch;
812  switch (target) {
813  case AV_PIX_FMT_ABGR:
814  out_abgr(R, G, B, nout);
815  break;
816  case AV_PIX_FMT_BGRA:
817  out_bgra(R, G, B, nout);
818  break;
819  case AV_PIX_FMT_RGBA:
820  out_rgba(R, G, B, nout);
821  break;
822  case AV_PIX_FMT_ARGB:
823  out_argb(R, G, B, nout);
824  break;
825  case AV_PIX_FMT_RGB24:
826  out_rgb24(R, G, B, nout);
827  break;
828  case AV_PIX_FMT_BGR24:
829  out_bgr24(R, G, B, nout);
830  break;
831  default:
832  /* Unreachable, I think. */
833  av_log(c, AV_LOG_ERROR,
834  "altivec_yuv2packedX doesn't support %s output\n",
835  av_get_pix_fmt_name(c->dstFormat));
836  return;
837  }
838 
839  memcpy(&((uint32_t *) dest)[i], scratch, (dstW - i) / 4);
840  }
841 }
842 
843 #define YUV2PACKEDX_WRAPPER(suffix, pixfmt) \
844 void ff_yuv2 ## suffix ## _X_altivec(SwsContext *c, \
845  const int16_t *lumFilter, \
846  const int16_t **lumSrc, \
847  int lumFilterSize, \
848  const int16_t *chrFilter, \
849  const int16_t **chrUSrc, \
850  const int16_t **chrVSrc, \
851  int chrFilterSize, \
852  const int16_t **alpSrc, \
853  uint8_t *dest, int dstW, int dstY) \
854 { \
855  yuv2packedX_altivec(c, lumFilter, lumSrc, lumFilterSize, \
856  chrFilter, chrUSrc, chrVSrc, \
857  chrFilterSize, alpSrc, \
858  dest, dstW, dstY, pixfmt); \
859 }
860 
861 YUV2PACKEDX_WRAPPER(abgr, AV_PIX_FMT_ABGR);
862 YUV2PACKEDX_WRAPPER(bgra, AV_PIX_FMT_BGRA);
863 YUV2PACKEDX_WRAPPER(argb, AV_PIX_FMT_ARGB);
864 YUV2PACKEDX_WRAPPER(rgba, AV_PIX_FMT_RGBA);
865 YUV2PACKEDX_WRAPPER(rgb24, AV_PIX_FMT_RGB24);
866 YUV2PACKEDX_WRAPPER(bgr24, AV_PIX_FMT_BGR24);
867 
868 #endif /* HAVE_ALTIVEC */
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