git.sesse.net Git - ffmpeg/blob - libswscale/ppc/yuv2rgb_altivec.c

   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
  93 #include "config.h"
  94 #include "libswscale/rgb2rgb.h"
  95 #include "libswscale/swscale.h"
  96 #include "libswscale/swscale_internal.h"
  97 #include "libavutil/attributes.h"
  98 #include "libavutil/cpu.h"
  99 #include "libavutil/mem_internal.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 static const vector unsigned char
 147     perm_rgb_0 = { 0x00, 0x01, 0x10, 0x02, 0x03, 0x11, 0x04, 0x05,
 148                    0x12, 0x06, 0x07, 0x13, 0x08, 0x09, 0x14, 0x0a },
 149     perm_rgb_1 = { 0x0b, 0x15, 0x0c, 0x0d, 0x16, 0x0e, 0x0f, 0x17,
 150                    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f },
 151     perm_rgb_2 = { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
 152                    0x00, 0x01, 0x18, 0x02, 0x03, 0x19, 0x04, 0x05 },
 153     perm_rgb_3 = { 0x1a, 0x06, 0x07, 0x1b, 0x08, 0x09, 0x1c, 0x0a,
 154                    0x0b, 0x1d, 0x0c, 0x0d, 0x1e, 0x0e, 0x0f, 0x1f };
 155
 156 #define vec_merge3(x2, x1, x0, y0, y1, y2)     \
 157     do {                                       \
 158         __typeof__(x0) o0, o2, o3;             \
 159         o0 = vec_mergeh(x0, x1);               \
 160         y0 = vec_perm(o0, x2, perm_rgb_0);     \
 161         o2 = vec_perm(o0, x2, perm_rgb_1);     \
 162         o3 = vec_mergel(x0, x1);               \
 163         y1 = vec_perm(o3, o2, perm_rgb_2);     \
 164         y2 = vec_perm(o3, o2, perm_rgb_3);     \
 165     } while (0)
 166
 167 #define vec_mstbgr24(x0, x1, x2, ptr)          \
 168     do {                                       \
 169         __typeof__(x0) _0, _1, _2;             \
 170         vec_merge3(x0, x1, x2, _0, _1, _2);    \
 171         vec_st(_0, 0, ptr++);                  \
 172         vec_st(_1, 0, ptr++);                  \
 173         vec_st(_2, 0, ptr++);                  \
 174     } while (0)
 175
 176 #define vec_mstrgb24(x0, x1, x2, ptr)          \
 177     do {                                       \
 178         __typeof__(x0) _0, _1, _2;             \
 179         vec_merge3(x2, x1, x0, _0, _1, _2);    \
 180         vec_st(_0, 0, ptr++);                  \
 181         vec_st(_1, 0, ptr++);                  \
 182         vec_st(_2, 0, ptr++);                  \
 183     } while (0)
 184
 185 /* pack the pixels in rgb0 format
 186  * msb R
 187  * lsb 0
 188  */
 189 #define vec_mstrgb32(T, x0, x1, x2, x3, ptr)                            \
 190     do {                                                                \
 191         T _0, _1, _2, _3;                                               \
 192         _0 = vec_mergeh(x0, x1);                                        \
 193         _1 = vec_mergeh(x2, x3);                                        \
 194         _2 = (T) vec_mergeh((vector unsigned short) _0,                 \
 195                             (vector unsigned short) _1);                \
 196         _3 = (T) vec_mergel((vector unsigned short) _0,                 \
 197                             (vector unsigned short) _1);                \
 198         vec_st(_2, 0 * 16, (T *) ptr);                                  \
 199         vec_st(_3, 1 * 16, (T *) ptr);                                  \
 200         _0 = vec_mergel(x0, x1);                                        \
 201         _1 = vec_mergel(x2, x3);                                        \
 202         _2 = (T) vec_mergeh((vector unsigned short) _0,                 \
 203                             (vector unsigned short) _1);                \
 204         _3 = (T) vec_mergel((vector unsigned short) _0,                 \
 205                             (vector unsigned short) _1);                \
 206         vec_st(_2, 2 * 16, (T *) ptr);                                  \
 207         vec_st(_3, 3 * 16, (T *) ptr);                                  \
 208         ptr += 4;                                                       \
 209     } while (0)
 210
 211 /*
 212  * 1     0       1.4021   | | Y |
 213  * 1    -0.3441 -0.7142   |x| Cb|
 214  * 1     1.7718  0        | | Cr|
 215  *
 216  *
 217  * Y:      [-128 127]
 218  * Cb/Cr : [-128 127]
 219  *
 220  * typical YUV conversion works on Y: 0-255 this version has been
 221  * optimized for JPEG decoding.
 222  */
 223
 224 #if HAVE_BIGENDIAN
 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 #else
 239 #define vec_unh(x)(vector signed short) vec_mergeh(x,(__typeof__(x)) { 0 })
 240 #define vec_unl(x)(vector signed short) vec_mergel(x,(__typeof__(x)) { 0 })
 241 #endif
 242
 243 #define vec_clip_s16(x)                                                 \
 244     vec_max(vec_min(x, ((vector signed short) {                         \
 245                     235, 235, 235, 235, 235, 235, 235, 235 })),         \
 246             ((vector signed short) { 16, 16, 16, 16, 16, 16, 16, 16 }))
 247
 248 #define vec_packclp(x, y)                                               \
 249     (vector unsigned char)                                              \
 250         vec_packs((vector unsigned short)                               \
 251                       vec_max(x, ((vector signed short) { 0 })),        \
 252                   (vector unsigned short)                               \
 253                       vec_max(y, ((vector signed short) { 0 })))
 254
 255 static inline void cvtyuvtoRGB(SwsContext *c, vector signed short Y,
 256                                vector signed short U, vector signed short V,
 257                                vector signed short *R, vector signed short *G,
 258                                vector signed short *B)
 259 {
 260     vector signed short vx, ux, uvx;
 261
 262     Y = vec_mradds(Y, c->CY, c->OY);
 263     U = vec_sub(U, (vector signed short)
 264                        vec_splat((vector signed short) { 128 }, 0));
 265     V = vec_sub(V, (vector signed short)
 266                        vec_splat((vector signed short) { 128 }, 0));
 267
 268     // ux  = (CBU * (u << c->CSHIFT) + 0x4000) >> 15;
 269     ux = vec_sl(U, c->CSHIFT);
 270     *B = vec_mradds(ux, c->CBU, Y);
 271
 272     // vx  = (CRV * (v << c->CSHIFT) + 0x4000) >> 15;
 273     vx = vec_sl(V, c->CSHIFT);
 274     *R = vec_mradds(vx, c->CRV, Y);
 275
 276     // uvx = ((CGU * u) + (CGV * v)) >> 15;
 277     uvx = vec_mradds(U, c->CGU, Y);
 278     *G  = vec_mradds(V, c->CGV, uvx);
 279 }
 280
 281 /*
 282  * ------------------------------------------------------------------------------
 283  * CS converters
 284  * ------------------------------------------------------------------------------
 285  */
 286
 287 #define DEFCSP420_CVT(name, out_pixels)                                       \
 288 static int altivec_ ## name(SwsContext *c, const unsigned char **in,          \
 289                             int *instrides, int srcSliceY, int srcSliceH,     \
 290                             unsigned char **oplanes, int *outstrides)         \
 291 {                                                                             \
 292     int w = c->srcW;                                                          \
 293     int h = srcSliceH;                                                        \
 294     int i, j;                                                                 \
 295     int instrides_scl[3];                                                     \
 296     vector unsigned char y0, y1;                                              \
 297                                                                               \
 298     vector signed char u, v;                                                  \
 299                                                                               \
 300     vector signed short Y0, Y1, Y2, Y3;                                       \
 301     vector signed short U, V;                                                 \
 302     vector signed short vx, ux, uvx;                                          \
 303     vector signed short vx0, ux0, uvx0;                                       \
 304     vector signed short vx1, ux1, uvx1;                                       \
 305     vector signed short R0, G0, B0;                                           \
 306     vector signed short R1, G1, B1;                                           \
 307     vector unsigned char R, G, B;                                             \
 308                                                                               \
 309     vector signed short lCY       = c->CY;                                    \
 310     vector signed short lOY       = c->OY;                                    \
 311     vector signed short lCRV      = c->CRV;                                   \
 312     vector signed short lCBU      = c->CBU;                                   \
 313     vector signed short lCGU      = c->CGU;                                   \
 314     vector signed short lCGV      = c->CGV;                                   \
 315     vector unsigned short lCSHIFT = c->CSHIFT;                                \
 316                                                                               \
 317     const ubyte *y1i = in[0];                                                 \
 318     const ubyte *y2i = in[0] + instrides[0];                                  \
 319     const ubyte *ui  = in[1];                                                 \
 320     const ubyte *vi  = in[2];                                                 \
 321                                                                               \
 322     vector unsigned char *oute, *outo;                                        \
 323                                                                               \
 324     /* loop moves y{1, 2}i by w */                                            \
 325     instrides_scl[0] = instrides[0] * 2 - w;                                  \
 326     /* loop moves ui by w / 2 */                                              \
 327     instrides_scl[1] = instrides[1] - w / 2;                                  \
 328     /* loop moves vi by w / 2 */                                              \
 329     instrides_scl[2] = instrides[2] - w / 2;                                  \
 330                                                                               \
 331     for (i = 0; i < h / 2; i++) {                                             \
 332         oute = (vector unsigned char *)(oplanes[0] + outstrides[0] *          \
 333                                         (srcSliceY + i * 2));                 \
 334         outo = oute + (outstrides[0] >> 4);                                   \
 335         vec_dstst(outo, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 0);       \
 336         vec_dstst(oute, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 1);       \
 337                                                                               \
 338         for (j = 0; j < w / 16; j++) {                                        \
 339             y0 = vec_xl(0, y1i);                                              \
 340                                                                               \
 341             y1 = vec_xl(0, y2i);                                              \
 342                                                                               \
 343             u = (vector signed char) vec_xl(0, ui);                           \
 344                                                                               \
 345             v = (vector signed char) vec_xl(0, vi);                           \
 346                                                                               \
 347             u = (vector signed char)                                          \
 348                     vec_sub(u,                                                \
 349                             (vector signed char)                              \
 350                                 vec_splat((vector signed char) { 128 }, 0));  \
 351             v = (vector signed char)                                          \
 352                     vec_sub(v,                                                \
 353                             (vector signed char)                              \
 354                                 vec_splat((vector signed char) { 128 }, 0));  \
 355                                                                               \
 356             U = vec_unpackh(u);                                               \
 357             V = vec_unpackh(v);                                               \
 358                                                                               \
 359             Y0 = vec_unh(y0);                                                 \
 360             Y1 = vec_unl(y0);                                                 \
 361             Y2 = vec_unh(y1);                                                 \
 362             Y3 = vec_unl(y1);                                                 \
 363                                                                               \
 364             Y0 = vec_mradds(Y0, lCY, lOY);                                    \
 365             Y1 = vec_mradds(Y1, lCY, lOY);                                    \
 366             Y2 = vec_mradds(Y2, lCY, lOY);                                    \
 367             Y3 = vec_mradds(Y3, lCY, lOY);                                    \
 368                                                                               \
 369             /* ux  = (CBU * (u << CSHIFT) + 0x4000) >> 15 */                  \
 370             ux  = vec_sl(U, lCSHIFT);                                         \
 371             ux  = vec_mradds(ux, lCBU, (vector signed short) { 0 });          \
 372             ux0 = vec_mergeh(ux, ux);                                         \
 373             ux1 = vec_mergel(ux, ux);                                         \
 374                                                                               \
 375             /* vx  = (CRV * (v << CSHIFT) + 0x4000) >> 15; */                 \
 376             vx  = vec_sl(V, lCSHIFT);                                         \
 377             vx  = vec_mradds(vx, lCRV, (vector signed short) { 0 });          \
 378             vx0 = vec_mergeh(vx, vx);                                         \
 379             vx1 = vec_mergel(vx, vx);                                         \
 380                                                                               \
 381             /* uvx = ((CGU * u) + (CGV * v)) >> 15 */                         \
 382             uvx  = vec_mradds(U, lCGU, (vector signed short) { 0 });          \
 383             uvx  = vec_mradds(V, lCGV, uvx);                                  \
 384             uvx0 = vec_mergeh(uvx, uvx);                                      \
 385             uvx1 = vec_mergel(uvx, uvx);                                      \
 386                                                                               \
 387             R0 = vec_add(Y0, vx0);                                            \
 388             G0 = vec_add(Y0, uvx0);                                           \
 389             B0 = vec_add(Y0, ux0);                                            \
 390             R1 = vec_add(Y1, vx1);                                            \
 391             G1 = vec_add(Y1, uvx1);                                           \
 392             B1 = vec_add(Y1, ux1);                                            \
 393                                                                               \
 394             R = vec_packclp(R0, R1);                                          \
 395             G = vec_packclp(G0, G1);                                          \
 396             B = vec_packclp(B0, B1);                                          \
 397                                                                               \
 398             out_pixels(R, G, B, oute);                                        \
 399                                                                               \
 400             R0 = vec_add(Y2, vx0);                                            \
 401             G0 = vec_add(Y2, uvx0);                                           \
 402             B0 = vec_add(Y2, ux0);                                            \
 403             R1 = vec_add(Y3, vx1);                                            \
 404             G1 = vec_add(Y3, uvx1);                                           \
 405             B1 = vec_add(Y3, ux1);                                            \
 406             R  = vec_packclp(R0, R1);                                         \
 407             G  = vec_packclp(G0, G1);                                         \
 408             B  = vec_packclp(B0, B1);                                         \
 409                                                                               \
 410                                                                               \
 411             out_pixels(R, G, B, outo);                                        \
 412                                                                               \
 413             y1i += 16;                                                        \
 414             y2i += 16;                                                        \
 415             ui  += 8;                                                         \
 416             vi  += 8;                                                         \
 417         }                                                                     \
 418                                                                               \
 419         ui  += instrides_scl[1];                                              \
 420         vi  += instrides_scl[2];                                              \
 421         y1i += instrides_scl[0];                                              \
 422         y2i += instrides_scl[0];                                              \
 423     }                                                                         \
 424     return srcSliceH;                                                         \
 425 }
 426
 427 #define out_abgr(a, b, c, ptr)                                          \
 428     vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), c, b, a, ptr)
 429 #define out_bgra(a, b, c, ptr)                                          \
 430     vec_mstrgb32(__typeof__(a), c, b, a, ((__typeof__(a)) { 255 }), ptr)
 431 #define out_rgba(a, b, c, ptr)                                          \
 432     vec_mstrgb32(__typeof__(a), a, b, c, ((__typeof__(a)) { 255 }), ptr)
 433 #define out_argb(a, b, c, ptr)                                          \
 434     vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), a, b, c, ptr)
 435 #define out_rgb24(a, b, c, ptr) vec_mstrgb24(a, b, c, ptr)
 436 #define out_bgr24(a, b, c, ptr) vec_mstbgr24(a, b, c, ptr)
 437
 438 DEFCSP420_CVT(yuv2_abgr,  out_abgr)
 439 DEFCSP420_CVT(yuv2_bgra,  out_bgra)
 440 DEFCSP420_CVT(yuv2_rgba,  out_rgba)
 441 DEFCSP420_CVT(yuv2_argb,  out_argb)
 442 DEFCSP420_CVT(yuv2_rgb24, out_rgb24)
 443 DEFCSP420_CVT(yuv2_bgr24, out_bgr24)
 444
 445 // uyvy|uyvy|uyvy|uyvy
 446 // 0123 4567 89ab cdef
 447 static const vector unsigned char
 448     demux_u = { 0x10, 0x00, 0x10, 0x00,
 449                 0x10, 0x04, 0x10, 0x04,
 450                 0x10, 0x08, 0x10, 0x08,
 451                 0x10, 0x0c, 0x10, 0x0c },
 452     demux_v = { 0x10, 0x02, 0x10, 0x02,
 453                 0x10, 0x06, 0x10, 0x06,
 454                 0x10, 0x0A, 0x10, 0x0A,
 455                 0x10, 0x0E, 0x10, 0x0E },
 456     demux_y = { 0x10, 0x01, 0x10, 0x03,
 457                 0x10, 0x05, 0x10, 0x07,
 458                 0x10, 0x09, 0x10, 0x0B,
 459                 0x10, 0x0D, 0x10, 0x0F };
 460
 461 /*
 462  * this is so I can play live CCIR raw video
 463  */
 464 static int altivec_uyvy_rgb32(SwsContext *c, const unsigned char **in,
 465                               int *instrides, int srcSliceY, int srcSliceH,
 466                               unsigned char **oplanes, int *outstrides)
 467 {
 468     int w = c->srcW;
 469     int h = srcSliceH;
 470     int i, j;
 471     vector unsigned char uyvy;
 472     vector signed short Y, U, V;
 473     vector signed short R0, G0, B0, R1, G1, B1;
 474     vector unsigned char R, G, B;
 475     vector unsigned char *out;
 476     const ubyte *img;
 477
 478     img = in[0];
 479     out = (vector unsigned char *) (oplanes[0] + srcSliceY * outstrides[0]);
 480
 481     for (i = 0; i < h; i++)
 482         for (j = 0; j < w / 16; j++) {
 483             uyvy = vec_ld(0, img);
 484
 485             U = (vector signed short)
 486                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
 487             V = (vector signed short)
 488                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
 489             Y = (vector signed short)
 490                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
 491
 492             cvtyuvtoRGB(c, Y, U, V, &R0, &G0, &B0);
 493
 494             uyvy = vec_ld(16, img);
 495
 496             U = (vector signed short)
 497                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
 498             V = (vector signed short)
 499                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
 500             Y = (vector signed short)
 501                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
 502
 503             cvtyuvtoRGB(c, Y, U, V, &R1, &G1, &B1);
 504
 505             R = vec_packclp(R0, R1);
 506             G = vec_packclp(G0, G1);
 507             B = vec_packclp(B0, B1);
 508
 509             // vec_mstbgr24 (R,G,B, out);
 510             out_rgba(R, G, B, out);
 511
 512             img += 32;
 513         }
 514     return srcSliceH;
 515 }
 516
 517 #endif /* HAVE_ALTIVEC */
 518
 519 /* Ok currently the acceleration routine only supports
 520  * inputs of widths a multiple of 16
 521  * and heights a multiple 2
 522  *
 523  * So we just fall back to the C codes for this.
 524  */
 525 av_cold SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)
 526 {
 527 #if HAVE_ALTIVEC
 528     if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
 529         return NULL;
 530
 531     /*
 532      * and this seems not to matter too much I tried a bunch of
 533      * videos with abnormal widths and MPlayer crashes elsewhere.
 534      * mplayer -vo x11 -rawvideo on:w=350:h=240 raw-350x240.eyuv
 535      * boom with X11 bad match.
 536      *
 537      */
 538     if ((c->srcW & 0xf) != 0)
 539         return NULL;
 540
 541     switch (c->srcFormat) {
 542     case AV_PIX_FMT_YUV410P:
 543     case AV_PIX_FMT_YUV420P:
 544     /*case IMGFMT_CLPL:        ??? */
 545     case AV_PIX_FMT_GRAY8:
 546     case AV_PIX_FMT_NV12:
 547     case AV_PIX_FMT_NV21:
 548         if ((c->srcH & 0x1) != 0)
 549             return NULL;
 550
 551         switch (c->dstFormat) {
 552         case AV_PIX_FMT_RGB24:
 553             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGB24\n");
 554             return altivec_yuv2_rgb24;
 555         case AV_PIX_FMT_BGR24:
 556             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGR24\n");
 557             return altivec_yuv2_bgr24;
 558         case AV_PIX_FMT_ARGB:
 559             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ARGB\n");
 560             return altivec_yuv2_argb;
 561         case AV_PIX_FMT_ABGR:
 562             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ABGR\n");
 563             return altivec_yuv2_abgr;
 564         case AV_PIX_FMT_RGBA:
 565             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGBA\n");
 566             return altivec_yuv2_rgba;
 567         case AV_PIX_FMT_BGRA:
 568             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGRA\n");
 569             return altivec_yuv2_bgra;
 570         default: return NULL;
 571         }
 572         break;
 573
 574     case AV_PIX_FMT_UYVY422:
 575         switch (c->dstFormat) {
 576         case AV_PIX_FMT_BGR32:
 577             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space UYVY -> RGB32\n");
 578             return altivec_uyvy_rgb32;
 579         default: return NULL;
 580         }
 581         break;
 582     }
 583 #endif /* HAVE_ALTIVEC */
 584
 585     return NULL;
 586 }
 587
 588 av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c,
 589                                         const int inv_table[4],
 590                                         int brightness,
 591                                         int contrast,
 592                                         int saturation)
 593 {
 594 #if HAVE_ALTIVEC
 595     union {
 596         DECLARE_ALIGNED(16, signed short, tmp)[8];
 597         vector signed short vec;
 598     } buf;
 599
 600     if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
 601         return;
 602
 603     buf.tmp[0] = ((0xffffLL) * contrast >> 8) >> 9;                               // cy
 604     buf.tmp[1] = -256 * brightness;                                               // oy
 605     buf.tmp[2] =   (inv_table[0] >> 3) * (contrast >> 16) * (saturation >> 16);   // crv
 606     buf.tmp[3] =   (inv_table[1] >> 3) * (contrast >> 16) * (saturation >> 16);   // cbu
 607     buf.tmp[4] = -((inv_table[2] >> 1) * (contrast >> 16) * (saturation >> 16));  // cgu
 608     buf.tmp[5] = -((inv_table[3] >> 1) * (contrast >> 16) * (saturation >> 16));  // cgv
 609
 610     c->CSHIFT = (vector unsigned short) vec_splat_u16(2);
 611     c->CY     = vec_splat((vector signed short) buf.vec, 0);
 612     c->OY     = vec_splat((vector signed short) buf.vec, 1);
 613     c->CRV    = vec_splat((vector signed short) buf.vec, 2);
 614     c->CBU    = vec_splat((vector signed short) buf.vec, 3);
 615     c->CGU    = vec_splat((vector signed short) buf.vec, 4);
 616     c->CGV    = vec_splat((vector signed short) buf.vec, 5);
 617     return;
 618 #endif /* HAVE_ALTIVEC */
 619 }
 620
 621 #if HAVE_ALTIVEC
 622
 623 static av_always_inline void 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     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);
 855
 856 #endif /* HAVE_ALTIVEC */