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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 #undef PROFILE_THE_BEAST
104 #undef INC_SCALING
105 
106 typedef unsigned char ubyte;
107 typedef signed char sbyte;
108 
109 /* RGB interleaver, 16 planar pels 8-bit samples per channel in
110  * homogeneous vector registers x0,x1,x2 are interleaved with the
111  * following technique:
112  *
113  * o0 = vec_mergeh(x0, x1);
114  * o1 = vec_perm(o0, x2, perm_rgb_0);
115  * o2 = vec_perm(o0, x2, perm_rgb_1);
116  * o3 = vec_mergel(x0, x1);
117  * o4 = vec_perm(o3, o2, perm_rgb_2);
118  * o5 = vec_perm(o3, o2, perm_rgb_3);
119  *
120  * perm_rgb_0: o0(RG).h v1(B) --> o1*
121  * 0 1 2 3 4
122  * rgbr|gbrg|brgb|rgbr
123  * 0010 0100 1001 0010
124  * 0102 3145 2673 894A
125  *
126  * perm_rgb_1: o0(RG).h v1(B) --> o2
127  * 0 1 2 3 4
128  * gbrg|brgb|bbbb|bbbb
129  * 0100 1001 1111 1111
130  * B5CD 6EF7 89AB CDEF
131  *
132  * perm_rgb_2: o3(RG).l o2(rgbB.l) --> o4*
133  * 0 1 2 3 4
134  * gbrg|brgb|rgbr|gbrg
135  * 1111 1111 0010 0100
136  * 89AB CDEF 0182 3945
137  *
138  * perm_rgb_2: o3(RG).l o2(rgbB.l) ---> o5*
139  * 0 1 2 3 4
140  * brgb|rgbr|gbrg|brgb
141  * 1001 0010 0100 1001
142  * a67b 89cA BdCD eEFf
143  *
144  */
145 static const vector unsigned char
146  perm_rgb_0 = { 0x00, 0x01, 0x10, 0x02, 0x03, 0x11, 0x04, 0x05,
147  0x12, 0x06, 0x07, 0x13, 0x08, 0x09, 0x14, 0x0a },
148  perm_rgb_1 = { 0x0b, 0x15, 0x0c, 0x0d, 0x16, 0x0e, 0x0f, 0x17,
149  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f },
150  perm_rgb_2 = { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
151  0x00, 0x01, 0x18, 0x02, 0x03, 0x19, 0x04, 0x05 },
152  perm_rgb_3 = { 0x1a, 0x06, 0x07, 0x1b, 0x08, 0x09, 0x1c, 0x0a,
153  0x0b, 0x1d, 0x0c, 0x0d, 0x1e, 0x0e, 0x0f, 0x1f };
154 
155 #define vec_merge3(x2, x1, x0, y0, y1, y2) \
156  do { \
157  __typeof__(x0) o0, o2, o3; \
158  o0 = vec_mergeh(x0, x1); \
159  y0 = vec_perm(o0, x2, perm_rgb_0); \
160  o2 = vec_perm(o0, x2, perm_rgb_1); \
161  o3 = vec_mergel(x0, x1); \
162  y1 = vec_perm(o3, o2, perm_rgb_2); \
163  y2 = vec_perm(o3, o2, perm_rgb_3); \
164  } while (0)
165 
166 #define vec_mstbgr24(x0, x1, x2, ptr) \
167  do { \
168  __typeof__(x0) _0, _1, _2; \
169  vec_merge3(x0, x1, x2, _0, _1, _2); \
170  vec_st(_0, 0, ptr++); \
171  vec_st(_1, 0, ptr++); \
172  vec_st(_2, 0, ptr++); \
173  } while (0)
174 
175 #define vec_mstrgb24(x0, x1, x2, ptr) \
176  do { \
177  __typeof__(x0) _0, _1, _2; \
178  vec_merge3(x2, x1, x0, _0, _1, _2); \
179  vec_st(_0, 0, ptr++); \
180  vec_st(_1, 0, ptr++); \
181  vec_st(_2, 0, ptr++); \
182  } while (0)
183 
184 /* pack the pixels in rgb0 format
185  * msb R
186  * lsb 0
187  */
188 #define vec_mstrgb32(T, x0, x1, x2, x3, ptr) \
189  do { \
190  T _0, _1, _2, _3; \
191  _0 = vec_mergeh(x0, x1); \
192  _1 = vec_mergeh(x2, x3); \
193  _2 = (T) vec_mergeh((vector unsigned short) _0, \
194  (vector unsigned short) _1); \
195  _3 = (T) vec_mergel((vector unsigned short) _0, \
196  (vector unsigned short) _1); \
197  vec_st(_2, 0 * 16, (T *) ptr); \
198  vec_st(_3, 1 * 16, (T *) ptr); \
199  _0 = vec_mergel(x0, x1); \
200  _1 = vec_mergel(x2, x3); \
201  _2 = (T) vec_mergeh((vector unsigned short) _0, \
202  (vector unsigned short) _1); \
203  _3 = (T) vec_mergel((vector unsigned short) _0, \
204  (vector unsigned short) _1); \
205  vec_st(_2, 2 * 16, (T *) ptr); \
206  vec_st(_3, 3 * 16, (T *) ptr); \
207  ptr += 4; \
208  } while (0)
209 
210 /*
211  * 1 0 1.4021 | | Y |
212  * 1 -0.3441 -0.7142 |x| Cb|
213  * 1 1.7718 0 | | Cr|
214  *
215  *
216  * Y: [-128 127]
217  * Cb/Cr : [-128 127]
218  *
219  * typical YUV conversion works on Y: 0-255 this version has been
220  * optimized for JPEG decoding.
221  */
222 
223 #define vec_unh(x) \
224  (vector signed short) \
225  vec_perm(x, (__typeof__(x)) { 0 }, \
226  ((vector unsigned char) { \
227  0x10, 0x00, 0x10, 0x01, 0x10, 0x02, 0x10, 0x03, \
228  0x10, 0x04, 0x10, 0x05, 0x10, 0x06, 0x10, 0x07 }))
229 
230 #define vec_unl(x) \
231  (vector signed short) \
232  vec_perm(x, (__typeof__(x)) { 0 }, \
233  ((vector unsigned char) { \
234  0x10, 0x08, 0x10, 0x09, 0x10, 0x0A, 0x10, 0x0B, \
235  0x10, 0x0C, 0x10, 0x0D, 0x10, 0x0E, 0x10, 0x0F }))
236 
237 #define vec_clip_s16(x) \
238  vec_max(vec_min(x, ((vector signed short) { \
239  235, 235, 235, 235, 235, 235, 235, 235 })), \
240  ((vector signed short) { 16, 16, 16, 16, 16, 16, 16, 16 }))
241 
242 #define vec_packclp(x, y) \
243  (vector unsigned char) \
244  vec_packs((vector unsigned short) \
245  vec_max(x, ((vector signed short) { 0 })), \
246  (vector unsigned short) \
247  vec_max(y, ((vector signed short) { 0 })))
248 
249 //#define out_pixels(a, b, c, ptr) vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), a, a, a, ptr)
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 /* Ok currently the acceleration routine only supports
530  * inputs of widths a multiple of 16
531  * and heights a multiple 2
532  *
533  * So we just fall back to the C codes for this.
534  */
535 av_cold SwsFunc ff_yuv2rgb_init_altivec(SwsContext *c)
536 {
537  if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
538  return NULL;
539 
540  /*
541  * and this seems not to matter too much I tried a bunch of
542  * videos with abnormal widths and MPlayer crashes elsewhere.
543  * mplayer -vo x11 -rawvideo on:w=350:h=240 raw-350x240.eyuv
544  * boom with X11 bad match.
545  *
546  */
547  if ((c->srcW & 0xf) != 0)
548  return NULL;
549 
550  switch (c->srcFormat) {
551  case AV_PIX_FMT_YUV410P:
552  case AV_PIX_FMT_YUV420P:
553  /*case IMGFMT_CLPL: ??? */
554  case AV_PIX_FMT_GRAY8:
555  case AV_PIX_FMT_NV12:
556  case AV_PIX_FMT_NV21:
557  if ((c->srcH & 0x1) != 0)
558  return NULL;
559 
560  switch (c->dstFormat) {
561  case AV_PIX_FMT_RGB24:
562  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGB24\n");
563  return altivec_yuv2_rgb24;
564  case AV_PIX_FMT_BGR24:
565  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGR24\n");
566  return altivec_yuv2_bgr24;
567  case AV_PIX_FMT_ARGB:
568  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ARGB\n");
569  return altivec_yuv2_argb;
570  case AV_PIX_FMT_ABGR:
571  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ABGR\n");
572  return altivec_yuv2_abgr;
573  case AV_PIX_FMT_RGBA:
574  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGBA\n");
575  return altivec_yuv2_rgba;
576  case AV_PIX_FMT_BGRA:
577  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGRA\n");
578  return altivec_yuv2_bgra;
579  default: return NULL;
580  }
581  break;
582 
583  case AV_PIX_FMT_UYVY422:
584  switch (c->dstFormat) {
585  case AV_PIX_FMT_BGR32:
586  av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space UYVY -> RGB32\n");
587  return altivec_uyvy_rgb32;
588  default: return NULL;
589  }
590  break;
591  }
592  return NULL;
593 }
594 
595 av_cold void ff_yuv2rgb_init_tables_altivec(SwsContext *c,
596  const int inv_table[4],
597  int brightness,
598  int contrast,
599  int saturation)
600 {
601  union {
602  DECLARE_ALIGNED(16, signed short, tmp)[8];
603  vector signed short vec;
604  } buf;
605 
606  buf.tmp[0] = ((0xffffLL) * contrast >> 8) >> 9; // cy
607  buf.tmp[1] = -256 * brightness; // oy
608  buf.tmp[2] = (inv_table[0] >> 3) * (contrast >> 16) * (saturation >> 16); // crv
609  buf.tmp[3] = (inv_table[1] >> 3) * (contrast >> 16) * (saturation >> 16); // cbu
610  buf.tmp[4] = -((inv_table[2] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgu
611  buf.tmp[5] = -((inv_table[3] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgv
612 
613  c->CSHIFT = (vector unsigned short) vec_splat_u16(2);
614  c->CY = vec_splat((vector signed short) buf.vec, 0);
615  c->OY = vec_splat((vector signed short) buf.vec, 1);
616  c->CRV = vec_splat((vector signed short) buf.vec, 2);
617  c->CBU = vec_splat((vector signed short) buf.vec, 3);
618  c->CGU = vec_splat((vector signed short) buf.vec, 4);
619  c->CGV = vec_splat((vector signed short) buf.vec, 5);
620  return;
621 }
622 
623 static av_always_inline void ff_yuv2packedX_altivec(SwsContext *c,
624  const int16_t *lumFilter,
625  const int16_t **lumSrc,
626  int lumFilterSize,
627  const int16_t *chrFilter,
628  const int16_t **chrUSrc,
629  const int16_t **chrVSrc,
630  int chrFilterSize,
631  const int16_t **alpSrc,
632  uint8_t *dest,
633  int dstW, int dstY,
634  enum AVPixelFormat target)
635 {
636  int i, j;
637  vector signed short X, X0, X1, Y0, U0, V0, Y1, U1, V1, U, V;
638  vector signed short R0, G0, B0, R1, G1, B1;
639 
640  vector unsigned char R, G, B;
641  vector unsigned char *out, *nout;
642 
643  vector signed short RND = vec_splat_s16(1 << 3);
644  vector unsigned short SCL = vec_splat_u16(4);
645  DECLARE_ALIGNED(16, unsigned int, scratch)[16];
646 
647  vector signed short *YCoeffs, *CCoeffs;
648 
649  YCoeffs = c->vYCoeffsBank + dstY * lumFilterSize;
650  CCoeffs = c->vCCoeffsBank + dstY * chrFilterSize;
651 
652  out = (vector unsigned char *) dest;
653 
654  for (i = 0; i < dstW; i += 16) {
655  Y0 = RND;
656  Y1 = RND;
657  /* extract 16 coeffs from lumSrc */
658  for (j = 0; j < lumFilterSize; j++) {
659  X0 = vec_ld(0, &lumSrc[j][i]);
660  X1 = vec_ld(16, &lumSrc[j][i]);
661  Y0 = vec_mradds(X0, YCoeffs[j], Y0);
662  Y1 = vec_mradds(X1, YCoeffs[j], Y1);
663  }
664 
665  U = RND;
666  V = RND;
667  /* extract 8 coeffs from U,V */
668  for (j = 0; j < chrFilterSize; j++) {
669  X = vec_ld(0, &chrUSrc[j][i / 2]);
670  U = vec_mradds(X, CCoeffs[j], U);
671  X = vec_ld(0, &chrVSrc[j][i / 2]);
672  V = vec_mradds(X, CCoeffs[j], V);
673  }
674 
675  /* scale and clip signals */
676  Y0 = vec_sra(Y0, SCL);
677  Y1 = vec_sra(Y1, SCL);
678  U = vec_sra(U, SCL);
679  V = vec_sra(V, SCL);
680 
681  Y0 = vec_clip_s16(Y0);
682  Y1 = vec_clip_s16(Y1);
683  U = vec_clip_s16(U);
684  V = vec_clip_s16(V);
685 
686  /* now we have
687  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
688  * U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
689  *
690  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
691  * U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
692  * V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
693  */
694 
695  U0 = vec_mergeh(U, U);
696  V0 = vec_mergeh(V, V);
697 
698  U1 = vec_mergel(U, U);
699  V1 = vec_mergel(V, V);
700 
701  cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
702  cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
703 
704  R = vec_packclp(R0, R1);
705  G = vec_packclp(G0, G1);
706  B = vec_packclp(B0, B1);
707 
708  switch (target) {
709  case AV_PIX_FMT_ABGR:
710  out_abgr(R, G, B, out);
711  break;
712  case AV_PIX_FMT_BGRA:
713  out_bgra(R, G, B, out);
714  break;
715  case AV_PIX_FMT_RGBA:
716  out_rgba(R, G, B, out);
717  break;
718  case AV_PIX_FMT_ARGB:
719  out_argb(R, G, B, out);
720  break;
721  case AV_PIX_FMT_RGB24:
722  out_rgb24(R, G, B, out);
723  break;
724  case AV_PIX_FMT_BGR24:
725  out_bgr24(R, G, B, out);
726  break;
727  default:
728  {
729  /* If this is reached, the caller should have called yuv2packedXinC
730  * instead. */
731  static int printed_error_message;
732  if (!printed_error_message) {
733  av_log(c, AV_LOG_ERROR,
734  "altivec_yuv2packedX doesn't support %s output\n",
735  av_get_pix_fmt_name(c->dstFormat));
736  printed_error_message = 1;
737  }
738  return;
739  }
740  }
741  }
742 
743  if (i < dstW) {
744  i -= 16;
745 
746  Y0 = RND;
747  Y1 = RND;
748  /* extract 16 coeffs from lumSrc */
749  for (j = 0; j < lumFilterSize; j++) {
750  X0 = vec_ld(0, &lumSrc[j][i]);
751  X1 = vec_ld(16, &lumSrc[j][i]);
752  Y0 = vec_mradds(X0, YCoeffs[j], Y0);
753  Y1 = vec_mradds(X1, YCoeffs[j], Y1);
754  }
755 
756  U = RND;
757  V = RND;
758  /* extract 8 coeffs from U,V */
759  for (j = 0; j < chrFilterSize; j++) {
760  X = vec_ld(0, &chrUSrc[j][i / 2]);
761  U = vec_mradds(X, CCoeffs[j], U);
762  X = vec_ld(0, &chrVSrc[j][i / 2]);
763  V = vec_mradds(X, CCoeffs[j], V);
764  }
765 
766  /* scale and clip signals */
767  Y0 = vec_sra(Y0, SCL);
768  Y1 = vec_sra(Y1, SCL);
769  U = vec_sra(U, SCL);
770  V = vec_sra(V, SCL);
771 
772  Y0 = vec_clip_s16(Y0);
773  Y1 = vec_clip_s16(Y1);
774  U = vec_clip_s16(U);
775  V = vec_clip_s16(V);
776 
777  /* now we have
778  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
779  * U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
780  *
781  * Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
782  * U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
783  * V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
784  */
785 
786  U0 = vec_mergeh(U, U);
787  V0 = vec_mergeh(V, V);
788 
789  U1 = vec_mergel(U, U);
790  V1 = vec_mergel(V, V);
791 
792  cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
793  cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
794 
795  R = vec_packclp(R0, R1);
796  G = vec_packclp(G0, G1);
797  B = vec_packclp(B0, B1);
798 
799  nout = (vector unsigned char *) scratch;
800  switch (target) {
801  case AV_PIX_FMT_ABGR:
802  out_abgr(R, G, B, nout);
803  break;
804  case AV_PIX_FMT_BGRA:
805  out_bgra(R, G, B, nout);
806  break;
807  case AV_PIX_FMT_RGBA:
808  out_rgba(R, G, B, nout);
809  break;
810  case AV_PIX_FMT_ARGB:
811  out_argb(R, G, B, nout);
812  break;
813  case AV_PIX_FMT_RGB24:
814  out_rgb24(R, G, B, nout);
815  break;
816  case AV_PIX_FMT_BGR24:
817  out_bgr24(R, G, B, nout);
818  break;
819  default:
820  /* Unreachable, I think. */
821  av_log(c, AV_LOG_ERROR,
822  "altivec_yuv2packedX doesn't support %s output\n",
823  av_get_pix_fmt_name(c->dstFormat));
824  return;
825  }
826 
827  memcpy(&((uint32_t *) dest)[i], scratch, (dstW - i) / 4);
828  }
829 }
830 
831 #define YUV2PACKEDX_WRAPPER(suffix, pixfmt) \
832 void ff_yuv2 ## suffix ## _X_altivec(SwsContext *c, \
833  const int16_t *lumFilter, \
834  const int16_t **lumSrc, \
835  int lumFilterSize, \
836  const int16_t *chrFilter, \
837  const int16_t **chrUSrc, \
838  const int16_t **chrVSrc, \
839  int chrFilterSize, \
840  const int16_t **alpSrc, \
841  uint8_t *dest, int dstW, int dstY) \
842 { \
843  ff_yuv2packedX_altivec(c, lumFilter, lumSrc, lumFilterSize, \
844  chrFilter, chrUSrc, chrVSrc, \
845  chrFilterSize, alpSrc, \
846  dest, dstW, dstY, pixfmt); \
847 }
848 
849 YUV2PACKEDX_WRAPPER(abgr, AV_PIX_FMT_ABGR);
850 YUV2PACKEDX_WRAPPER(bgra, AV_PIX_FMT_BGRA);
851 YUV2PACKEDX_WRAPPER(argb, AV_PIX_FMT_ARGB);
852 YUV2PACKEDX_WRAPPER(rgba, AV_PIX_FMT_RGBA);
853 YUV2PACKEDX_WRAPPER(rgb24, AV_PIX_FMT_RGB24);
854 YUV2PACKEDX_WRAPPER(bgr24, AV_PIX_FMT_BGR24);
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