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FFmpeg/libswscale/ppc/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. 

  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/pixdesc.h"

  100. #include "yuv2rgb_altivec.h"

  101. 

  102. #if HAVE_ALTIVEC

  103. 

  104. #undef PROFILE_THE_BEAST

  105. #undef INC_SCALING

  106. 

  107. typedef unsigned char ubyte;

  108. typedef signed char   sbyte;

  109. 

  110. /* RGB interleaver, 16 planar pels 8-bit samples per channel in

  111.  * homogeneous vector registers x0,x1,x2 are interleaved with the

  112.  * following technique:

  113.  *

  114.  *    o0 = vec_mergeh(x0, x1);

  115.  *    o1 = vec_perm(o0, x2, perm_rgb_0);

  116.  *    o2 = vec_perm(o0, x2, perm_rgb_1);

  117.  *    o3 = vec_mergel(x0, x1);

  118.  *    o4 = vec_perm(o3, o2, perm_rgb_2);

  119.  *    o5 = vec_perm(o3, o2, perm_rgb_3);

  120.  *

  121.  * perm_rgb_0:   o0(RG).h v1(B) --> o1*

  122.  *            0   1  2   3   4

  123.  *           rgbr|gbrg|brgb|rgbr

  124.  *           0010 0100 1001 0010

  125.  *           0102 3145 2673 894A

  126.  *

  127.  * perm_rgb_1:   o0(RG).h v1(B) --> o2

  128.  *            0   1  2   3   4

  129.  *           gbrg|brgb|bbbb|bbbb

  130.  *           0100 1001 1111 1111

  131.  *           B5CD 6EF7 89AB CDEF

  132.  *

  133.  * perm_rgb_2:   o3(RG).l o2(rgbB.l) --> o4*

  134.  *            0   1  2   3   4

  135.  *           gbrg|brgb|rgbr|gbrg

  136.  *           1111 1111 0010 0100

  137.  *           89AB CDEF 0182 3945

  138.  *

  139.  * perm_rgb_2:   o3(RG).l o2(rgbB.l) ---> o5*

  140.  *            0   1  2   3   4

  141.  *           brgb|rgbr|gbrg|brgb

  142.  *           1001 0010 0100 1001

  143.  *           a67b 89cA BdCD eEFf

  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. #if HAVE_BIGENDIAN

  224. #define vec_unh(x)                                                      \

  225.     (vector signed short)                                               \

  226.         vec_perm(x, (__typeof__(x)) { 0 },                              \

  227.                  ((vector unsigned char) {                              \

  228.                      0x10, 0x00, 0x10, 0x01, 0x10, 0x02, 0x10, 0x03,    \

  229.                      0x10, 0x04, 0x10, 0x05, 0x10, 0x06, 0x10, 0x07 }))

  230. 

  231. #define vec_unl(x)                                                      \

  232.     (vector signed short)                                               \

  233.         vec_perm(x, (__typeof__(x)) { 0 },                              \

  234.                  ((vector unsigned char) {                              \

  235.                      0x10, 0x08, 0x10, 0x09, 0x10, 0x0A, 0x10, 0x0B,    \

  236.                      0x10, 0x0C, 0x10, 0x0D, 0x10, 0x0E, 0x10, 0x0F }))

  237. #else

  238. #define vec_unh(x)(vector signed short) vec_mergeh(x,(__typeof__(x)) { 0 })

  239. #define vec_unl(x)(vector signed short) vec_mergel(x,(__typeof__(x)) { 0 })

  240. #endif

  241. 

  242. #define vec_clip_s16(x)                                                 \

  243.     vec_max(vec_min(x, ((vector signed short) {                         \

  244.                     235, 235, 235, 235, 235, 235, 235, 235 })),         \

  245.             ((vector signed short) { 16, 16, 16, 16, 16, 16, 16, 16 }))

  246. 

  247. #define vec_packclp(x, y)                                               \

  248.     (vector unsigned char)                                              \

  249.         vec_packs((vector unsigned short)                               \

  250.                       vec_max(x, ((vector signed short) { 0 })),        \

  251.                   (vector unsigned short)                               \

  252.                       vec_max(y, ((vector signed short) { 0 })))

  253. 

  254. static inline void cvtyuvtoRGB(SwsContext *c, vector signed short Y,

  255.                                vector signed short U, vector signed short V,

  256.                                vector signed short *R, vector signed short *G,

  257.                                vector signed short *B)

  258. {

  259.     vector signed short vx, ux, uvx;

  260. 

  261.     Y = vec_mradds(Y, c->CY, c->OY);

  262.     U = vec_sub(U, (vector signed short)

  263.                        vec_splat((vector signed short) { 128 }, 0));

  264.     V = vec_sub(V, (vector signed short)

  265.                        vec_splat((vector signed short) { 128 }, 0));

  266. 

  267.     // ux  = (CBU * (u << c->CSHIFT) + 0x4000) >> 15;

  268.     ux = vec_sl(U, c->CSHIFT);

  269.     *B = vec_mradds(ux, c->CBU, Y);

  270. 

  271.     // vx  = (CRV * (v << c->CSHIFT) + 0x4000) >> 15;

  272.     vx = vec_sl(V, c->CSHIFT);

  273.     *R = vec_mradds(vx, c->CRV, Y);

  274. 

  275.     // uvx = ((CGU * u) + (CGV * v)) >> 15;

  276.     uvx = vec_mradds(U, c->CGU, Y);

  277.     *G  = vec_mradds(V, c->CGV, uvx);

  278. }

  279. 

  280. /*

  281.  * ------------------------------------------------------------------------------

  282.  * CS converters

  283.  * ------------------------------------------------------------------------------

  284.  */

  285. 

  286. #define DEFCSP420_CVT(name, out_pixels)                                       \

  287. static int altivec_ ## name(SwsContext *c, const unsigned char **in,          \

  288.                             int *instrides, int srcSliceY, int srcSliceH,     \

  289.                             unsigned char **oplanes, int *outstrides)         \

  290. {                                                                             \

  291.     int w = c->srcW;                                                          \

  292.     int h = srcSliceH;                                                        \

  293.     int i, j;                                                                 \

  294.     int instrides_scl[3];                                                     \

  295.     vector unsigned char y0, y1;                                              \

  296.                                                                               \

  297.     vector signed char u, v;                                                  \

  298.                                                                               \

  299.     vector signed short Y0, Y1, Y2, Y3;                                       \

  300.     vector signed short U, V;                                                 \

  301.     vector signed short vx, ux, uvx;                                          \

  302.     vector signed short vx0, ux0, uvx0;                                       \

  303.     vector signed short vx1, ux1, uvx1;                                       \

  304.     vector signed short R0, G0, B0;                                           \

  305.     vector signed short R1, G1, B1;                                           \

  306.     vector unsigned char R, G, B;                                             \

  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.             y0 = vec_xl(0, y1i);                                              \

  339.                                                                               \

  340.             y1 = vec_xl(0, y2i);                                              \

  341.                                                                               \

  342.             u = (vector signed char) vec_xl(0, ui);                           \

  343.                                                                               \

  344.             v = (vector signed char) vec_xl(0, vi);                           \

  345.                                                                               \

  346.             u = (vector signed char)                                          \

  347.                     vec_sub(u,                                                \

  348.                             (vector signed char)                              \

  349.                                 vec_splat((vector signed char) { 128 }, 0));  \

  350.             v = (vector signed char)                                          \

  351.                     vec_sub(v,                                                \

  352.                             (vector signed char)                              \

  353.                                 vec_splat((vector signed char) { 128 }, 0));  \

  354.                                                                               \

  355.             U = vec_unpackh(u);                                               \

  356.             V = vec_unpackh(v);                                               \

  357.                                                                               \

  358.             Y0 = vec_unh(y0);                                                 \

  359.             Y1 = vec_unl(y0);                                                 \

  360.             Y2 = vec_unh(y1);                                                 \

  361.             Y3 = vec_unl(y1);                                                 \

  362.                                                                               \

  363.             Y0 = vec_mradds(Y0, lCY, lOY);                                    \

  364.             Y1 = vec_mradds(Y1, lCY, lOY);                                    \

  365.             Y2 = vec_mradds(Y2, lCY, lOY);                                    \

  366.             Y3 = vec_mradds(Y3, lCY, lOY);                                    \

  367.                                                                               \

  368.             /* ux  = (CBU * (u << CSHIFT) + 0x4000) >> 15 */                  \

  369.             ux  = vec_sl(U, lCSHIFT);                                         \

  370.             ux  = vec_mradds(ux, lCBU, (vector signed short) { 0 });          \

  371.             ux0 = vec_mergeh(ux, ux);                                         \

  372.             ux1 = vec_mergel(ux, ux);                                         \

  373.                                                                               \

  374.             /* vx  = (CRV * (v << CSHIFT) + 0x4000) >> 15; */                 \

  375.             vx  = vec_sl(V, lCSHIFT);                                         \

  376.             vx  = vec_mradds(vx, lCRV, (vector signed short) { 0 });          \

  377.             vx0 = vec_mergeh(vx, vx);                                         \

  378.             vx1 = vec_mergel(vx, vx);                                         \

  379.                                                                               \

  380.             /* uvx = ((CGU * u) + (CGV * v)) >> 15 */                         \

  381.             uvx  = vec_mradds(U, lCGU, (vector signed short) { 0 });          \

  382.             uvx  = vec_mradds(V, lCGV, uvx);                                  \

  383.             uvx0 = vec_mergeh(uvx, uvx);                                      \

  384.             uvx1 = vec_mergel(uvx, uvx);                                      \

  385.                                                                               \

  386.             R0 = vec_add(Y0, vx0);                                            \

  387.             G0 = vec_add(Y0, uvx0);                                           \

  388.             B0 = vec_add(Y0, ux0);                                            \

  389.             R1 = vec_add(Y1, vx1);                                            \

  390.             G1 = vec_add(Y1, uvx1);                                           \

  391.             B1 = vec_add(Y1, ux1);                                            \

  392.                                                                               \

  393.             R = vec_packclp(R0, R1);                                          \

  394.             G = vec_packclp(G0, G1);                                          \

  395.             B = vec_packclp(B0, B1);                                          \

  396.                                                                               \

  397.             out_pixels(R, G, B, oute);                                        \

  398.                                                                               \

  399.             R0 = vec_add(Y2, vx0);                                            \

  400.             G0 = vec_add(Y2, uvx0);                                           \

  401.             B0 = vec_add(Y2, ux0);                                            \

  402.             R1 = vec_add(Y3, vx1);                                            \

  403.             G1 = vec_add(Y3, uvx1);                                           \

  404.             B1 = vec_add(Y3, ux1);                                            \

  405.             R  = vec_packclp(R0, R1);                                         \

  406.             G  = vec_packclp(G0, G1);                                         \

  407.             B  = vec_packclp(B0, B1);                                         \

  408.                                                                               \

  409.                                                                               \

  410.             out_pixels(R, G, B, outo);                                        \

  411.                                                                               \

  412.             y1i += 16;                                                        \

  413.             y2i += 16;                                                        \

  414.             ui  += 8;                                                         \

  415.             vi  += 8;                                                         \

  416.         }                                                                     \

  417.                                                                               \

  418.         ui  += instrides_scl[1];                                              \

  419.         vi  += instrides_scl[2];                                              \

  420.         y1i += instrides_scl[0];                                              \

  421.         y2i += instrides_scl[0];                                              \

  422.     }                                                                         \

  423.     return srcSliceH;                                                         \

  424. }

  425. 

  426. #define out_abgr(a, b, c, ptr)                                          \

  427.     vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), c, b, a, ptr)

  428. #define out_bgra(a, b, c, ptr)                                          \

  429.     vec_mstrgb32(__typeof__(a), c, b, a, ((__typeof__(a)) { 255 }), ptr)

  430. #define out_rgba(a, b, c, ptr)                                          \

  431.     vec_mstrgb32(__typeof__(a), a, b, c, ((__typeof__(a)) { 255 }), ptr)

  432. #define out_argb(a, b, c, ptr)                                          \

  433.     vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), a, b, c, ptr)

  434. #define out_rgb24(a, b, c, ptr) vec_mstrgb24(a, b, c, ptr)

  435. #define out_bgr24(a, b, c, ptr) vec_mstbgr24(a, b, c, ptr)

  436. 

  437. DEFCSP420_CVT(yuv2_abgr,  out_abgr)

  438. DEFCSP420_CVT(yuv2_bgra,  out_bgra)

  439. DEFCSP420_CVT(yuv2_rgba,  out_rgba)

  440. DEFCSP420_CVT(yuv2_argb,  out_argb)

  441. DEFCSP420_CVT(yuv2_rgb24, out_rgb24)

  442. DEFCSP420_CVT(yuv2_bgr24, out_bgr24)

  443. 

  444. // uyvy|uyvy|uyvy|uyvy

  445. // 0123 4567 89ab cdef

  446. static const vector unsigned char

  447.     demux_u = { 0x10, 0x00, 0x10, 0x00,

  448.                 0x10, 0x04, 0x10, 0x04,

  449.                 0x10, 0x08, 0x10, 0x08,

  450.                 0x10, 0x0c, 0x10, 0x0c },

  451.     demux_v = { 0x10, 0x02, 0x10, 0x02,

  452.                 0x10, 0x06, 0x10, 0x06,

  453.                 0x10, 0x0A, 0x10, 0x0A,

  454.                 0x10, 0x0E, 0x10, 0x0E },

  455.     demux_y = { 0x10, 0x01, 0x10, 0x03,

  456.                 0x10, 0x05, 0x10, 0x07,

  457.                 0x10, 0x09, 0x10, 0x0B,

  458.                 0x10, 0x0D, 0x10, 0x0F };

  459. 

  460. /*

  461.  * this is so I can play live CCIR raw video

  462.  */

  463. static int altivec_uyvy_rgb32(SwsContext *c, const unsigned char **in,

  464.                               int *instrides, int srcSliceY, int srcSliceH,

  465.                               unsigned char **oplanes, int *outstrides)

  466. {

  467.     int w = c->srcW;

  468.     int h = srcSliceH;

  469.     int i, j;

  470.     vector unsigned char uyvy;

  471.     vector signed short Y, U, V;

  472.     vector signed short R0, G0, B0, R1, G1, B1;

  473.     vector unsigned char R, G, B;

  474.     vector unsigned char *out;

  475.     const ubyte *img;

  476. 

  477.     img = in[0];

  478.     out = (vector unsigned char *) (oplanes[0] + srcSliceY * outstrides[0]);

  479. 

  480.     for (i = 0; i < h; i++)

  481.         for (j = 0; j < w / 16; j++) {

  482.             uyvy = vec_ld(0, img);

  483. 

  484.             U = (vector signed short)

  485.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);

  486.             V = (vector signed short)

  487.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);

  488.             Y = (vector signed short)

  489.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);

  490. 

  491.             cvtyuvtoRGB(c, Y, U, V, &R0, &G0, &B0);

  492. 

  493.             uyvy = vec_ld(16, img);

  494. 

  495.             U = (vector signed short)

  496.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);

  497.             V = (vector signed short)

  498.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);

  499.             Y = (vector signed short)

  500.                     vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);

  501. 

  502.             cvtyuvtoRGB(c, Y, U, V, &R1, &G1, &B1);

  503. 

  504.             R = vec_packclp(R0, R1);

  505.             G = vec_packclp(G0, G1);

  506.             B = vec_packclp(B0, B1);

  507. 

  508.             // vec_mstbgr24 (R,G,B, out);

  509.             out_rgba(R, G, B, out);

  510. 

  511.             img += 32;

  512.         }

  513.     return srcSliceH;

  514. }

  515. 

  516. #endif /* HAVE_ALTIVEC */

  517. 

  518. /* Ok currently the acceleration routine only supports

  519.  * inputs of widths a multiple of 16

  520.  * and heights a multiple 2

  521.  *

  522.  * So we just fall back to the C codes for this.

  523.  */

  524. av_cold SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)

  525. {

  526. #if HAVE_ALTIVEC

  527.     if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))

  528.         return NULL;

  529. 

  530.     /*

  531.      * and this seems not to matter too much I tried a bunch of

  532.      * videos with abnormal widths and MPlayer crashes elsewhere.

  533.      * mplayer -vo x11 -rawvideo on:w=350:h=240 raw-350x240.eyuv

  534.      * boom with X11 bad match.

  535.      *

  536.      */

  537.     if ((c->srcW & 0xf) != 0)

  538.         return NULL;

  539. 

  540.     switch (c->srcFormat) {

  541.     case AV_PIX_FMT_YUV410P:

  542.     case AV_PIX_FMT_YUV420P:

  543.     /*case IMGFMT_CLPL:        ??? */

  544.     case AV_PIX_FMT_GRAY8:

  545.     case AV_PIX_FMT_NV12:

  546.     case AV_PIX_FMT_NV21:

  547.         if ((c->srcH & 0x1) != 0)

  548.             return NULL;

  549. 

  550.         switch (c->dstFormat) {

  551.         case AV_PIX_FMT_RGB24:

  552.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGB24\n");

  553.             return altivec_yuv2_rgb24;

  554.         case AV_PIX_FMT_BGR24:

  555.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGR24\n");

  556.             return altivec_yuv2_bgr24;

  557.         case AV_PIX_FMT_ARGB:

  558.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ARGB\n");

  559.             return altivec_yuv2_argb;

  560.         case AV_PIX_FMT_ABGR:

  561.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ABGR\n");

  562.             return altivec_yuv2_abgr;

  563.         case AV_PIX_FMT_RGBA:

  564.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGBA\n");

  565.             return altivec_yuv2_rgba;

  566.         case AV_PIX_FMT_BGRA:

  567.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGRA\n");

  568.             return altivec_yuv2_bgra;

  569.         default: return NULL;

  570.         }

  571.         break;

  572. 

  573.     case AV_PIX_FMT_UYVY422:

  574.         switch (c->dstFormat) {

  575.         case AV_PIX_FMT_BGR32:

  576.             av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space UYVY -> RGB32\n");

  577.             return altivec_uyvy_rgb32;

  578.         default: return NULL;

  579.         }

  580.         break;

  581.     }

  582. #endif /* HAVE_ALTIVEC */

  583. 

  584.     return NULL;

  585. }

  586. 

  587. av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c,

  588.                                         const int inv_table[4],

  589.                                         int brightness,

  590.                                         int contrast,

  591.                                         int saturation)

  592. {

  593. #if HAVE_ALTIVEC

  594.     union {

  595.         DECLARE_ALIGNED(16, signed short, tmp)[8];

  596.         vector signed short vec;

  597.     } buf;

  598. 

  599.     if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))

  600.         return;

  601. 

  602.     buf.tmp[0] = ((0xffffLL) * contrast >> 8) >> 9;                               // cy

  603.     buf.tmp[1] = -256 * brightness;                                               // oy

  604.     buf.tmp[2] =   (inv_table[0] >> 3) * (contrast >> 16) * (saturation >> 16);   // crv

  605.     buf.tmp[3] =   (inv_table[1] >> 3) * (contrast >> 16) * (saturation >> 16);   // cbu

  606.     buf.tmp[4] = -((inv_table[2] >> 1) * (contrast >> 16) * (saturation >> 16));  // cgu

  607.     buf.tmp[5] = -((inv_table[3] >> 1) * (contrast >> 16) * (saturation >> 16));  // cgv

  608. 

  609.     c->CSHIFT = (vector unsigned short) vec_splat_u16(2);

  610.     c->CY     = vec_splat((vector signed short) buf.vec, 0);

  611.     c->OY     = vec_splat((vector signed short) buf.vec, 1);

  612.     c->CRV    = vec_splat((vector signed short) buf.vec, 2);

  613.     c->CBU    = vec_splat((vector signed short) buf.vec, 3);

  614.     c->CGU    = vec_splat((vector signed short) buf.vec, 4);

  615.     c->CGV    = vec_splat((vector signed short) buf.vec, 5);

  616.     return;

  617. #endif /* HAVE_ALTIVEC */

  618. }

  619. 

  620. #if HAVE_ALTIVEC

  621. 

  622. static av_always_inline void yuv2packedX_altivec(SwsContext *c,

  623.                                                  const int16_t *lumFilter,

  624.                                                  const int16_t **lumSrc,

  625.                                                  int lumFilterSize,

  626.                                                  const int16_t *chrFilter,

  627.                                                  const int16_t **chrUSrc,

  628.                                                  const int16_t **chrVSrc,

  629.                                                  int chrFilterSize,

  630.                                                  const int16_t **alpSrc,

  631.                                                  uint8_t *dest,

  632.                                                  int dstW, int dstY,

  633.                                                  enum AVPixelFormat target)

  634. {

  635.     int i, j;

  636.     vector signed short X, X0, X1, Y0, U0, V0, Y1, U1, V1, U, V;

  637.     vector signed short R0, G0, B0, R1, G1, B1;

  638. 

  639.     vector unsigned char R, G, B;

  640.     vector unsigned char *out, *nout;

  641. 

  642.     vector signed short RND   = vec_splat_s16(1 << 3);

  643.     vector unsigned short SCL = vec_splat_u16(4);

  644.     DECLARE_ALIGNED(16, unsigned int, scratch)[16];

  645. 

  646.     vector signed short *YCoeffs, *CCoeffs;

  647. 

  648.     YCoeffs = c->vYCoeffsBank + dstY * lumFilterSize;

  649.     CCoeffs = c->vCCoeffsBank + dstY * chrFilterSize;

  650. 

  651.     out = (vector unsigned char *) dest;

  652. 

  653.     for (i = 0; i < dstW; i += 16) {

  654.         Y0 = RND;

  655.         Y1 = RND;

  656.         /* extract 16 coeffs from lumSrc */

  657.         for (j = 0; j < lumFilterSize; j++) {

  658.             X0 = vec_ld(0, &lumSrc[j][i]);

  659.             X1 = vec_ld(16, &lumSrc[j][i]);

  660.             Y0 = vec_mradds(X0, YCoeffs[j], Y0);

  661.             Y1 = vec_mradds(X1, YCoeffs[j], Y1);

  662.         }

  663. 

  664.         U = RND;

  665.         V = RND;

  666.         /* extract 8 coeffs from U,V */

  667.         for (j = 0; j < chrFilterSize; j++) {

  668.             X = vec_ld(0, &chrUSrc[j][i / 2]);

  669.             U = vec_mradds(X, CCoeffs[j], U);

  670.             X = vec_ld(0, &chrVSrc[j][i / 2]);

  671.             V = vec_mradds(X, CCoeffs[j], V);

  672.         }

  673. 

  674.         /* scale and clip signals */

  675.         Y0 = vec_sra(Y0, SCL);

  676.         Y1 = vec_sra(Y1, SCL);

  677.         U  = vec_sra(U, SCL);

  678.         V  = vec_sra(V, SCL);

  679. 

  680.         Y0 = vec_clip_s16(Y0);

  681.         Y1 = vec_clip_s16(Y1);

  682.         U  = vec_clip_s16(U);

  683.         V  = vec_clip_s16(V);

  684. 

  685.         /* now we have

  686.          * Y0 = y0 y1 y2 y3 y4 y5 y6 y7    Y1 = y8 y9 y10 y11 y12 y13 y14 y15

  687.          * U  = u0 u1 u2 u3 u4 u5 u6 u7    V  = v0 v1 v2 v3 v4 v5 v6 v7

  688.          *

  689.          * Y0 = y0 y1 y2 y3 y4 y5 y6 y7    Y1 = y8 y9 y10 y11 y12 y13 y14 y15

  690.          * U0 = u0 u0 u1 u1 u2 u2 u3 u3    U1 = u4 u4 u5 u5 u6 u6 u7 u7

  691.          * V0 = v0 v0 v1 v1 v2 v2 v3 v3    V1 = v4 v4 v5 v5 v6 v6 v7 v7

  692.          */

  693. 

  694.         U0 = vec_mergeh(U, U);

  695.         V0 = vec_mergeh(V, V);

  696. 

  697.         U1 = vec_mergel(U, U);

  698.         V1 = vec_mergel(V, V);

  699. 

  700.         cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);

  701.         cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);

  702. 

  703.         R = vec_packclp(R0, R1);

  704.         G = vec_packclp(G0, G1);

  705.         B = vec_packclp(B0, B1);

  706. 

  707.         switch (target) {

  708.         case AV_PIX_FMT_ABGR:

  709.             out_abgr(R, G, B, out);

  710.             break;

  711.         case AV_PIX_FMT_BGRA:

  712.             out_bgra(R, G, B, out);

  713.             break;

  714.         case AV_PIX_FMT_RGBA:

  715.             out_rgba(R, G, B, out);

  716.             break;

  717.         case AV_PIX_FMT_ARGB:

  718.             out_argb(R, G, B, out);

  719.             break;

  720.         case AV_PIX_FMT_RGB24:

  721.             out_rgb24(R, G, B, out);

  722.             break;

  723.         case AV_PIX_FMT_BGR24:

  724.             out_bgr24(R, G, B, out);

  725.             break;

  726.         default:

  727.         {

  728.             /* If this is reached, the caller should have called yuv2packedXinC

  729.              * instead. */

  730.             static int printed_error_message;

  731.             if (!printed_error_message) {

  732.                 av_log(c, AV_LOG_ERROR,

  733.                        "altivec_yuv2packedX doesn't support %s output\n",

  734.                        av_get_pix_fmt_name(c->dstFormat));

  735.                 printed_error_message = 1;

  736.             }

  737.             return;

  738.         }

  739.         }

  740.     }

  741. 

  742.     if (i < dstW) {

  743.         i -= 16;

  744. 

  745.         Y0 = RND;

  746.         Y1 = RND;

  747.         /* extract 16 coeffs from lumSrc */

  748.         for (j = 0; j < lumFilterSize; j++) {

  749.             X0 = vec_ld(0, &lumSrc[j][i]);

  750.             X1 = vec_ld(16, &lumSrc[j][i]);

  751.             Y0 = vec_mradds(X0, YCoeffs[j], Y0);

  752.             Y1 = vec_mradds(X1, YCoeffs[j], Y1);

  753.         }

  754. 

  755.         U = RND;

  756.         V = RND;

  757.         /* extract 8 coeffs from U,V */

  758.         for (j = 0; j < chrFilterSize; j++) {

  759.             X = vec_ld(0, &chrUSrc[j][i / 2]);

  760.             U = vec_mradds(X, CCoeffs[j], U);

  761.             X = vec_ld(0, &chrVSrc[j][i / 2]);

  762.             V = vec_mradds(X, CCoeffs[j], V);

  763.         }

  764. 

  765.         /* scale and clip signals */

  766.         Y0 = vec_sra(Y0, SCL);

  767.         Y1 = vec_sra(Y1, SCL);

  768.         U  = vec_sra(U, SCL);

  769.         V  = vec_sra(V, SCL);

  770. 

  771.         Y0 = vec_clip_s16(Y0);

  772.         Y1 = vec_clip_s16(Y1);

  773.         U  = vec_clip_s16(U);

  774.         V  = vec_clip_s16(V);

  775. 

  776.         /* now we have

  777.          * Y0 = y0 y1 y2 y3 y4 y5 y6 y7    Y1 = y8 y9 y10 y11 y12 y13 y14 y15

  778.          * U  = u0 u1 u2 u3 u4 u5 u6 u7    V  = v0 v1 v2 v3 v4 v5 v6 v7

  779.          *

  780.          * Y0 = y0 y1 y2 y3 y4 y5 y6 y7    Y1 = y8 y9 y10 y11 y12 y13 y14 y15

  781.          * U0 = u0 u0 u1 u1 u2 u2 u3 u3    U1 = u4 u4 u5 u5 u6 u6 u7 u7

  782.          * V0 = v0 v0 v1 v1 v2 v2 v3 v3    V1 = v4 v4 v5 v5 v6 v6 v7 v7

  783.          */

  784. 

  785.         U0 = vec_mergeh(U, U);

  786.         V0 = vec_mergeh(V, V);

  787. 

  788.         U1 = vec_mergel(U, U);

  789.         V1 = vec_mergel(V, V);

  790. 

  791.         cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);

  792.         cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);

  793. 

  794.         R = vec_packclp(R0, R1);

  795.         G = vec_packclp(G0, G1);

  796.         B = vec_packclp(B0, B1);

  797. 

  798.         nout = (vector unsigned char *) scratch;

  799.         switch (target) {

  800.         case AV_PIX_FMT_ABGR:

  801.             out_abgr(R, G, B, nout);

  802.             break;

  803.         case AV_PIX_FMT_BGRA:

  804.             out_bgra(R, G, B, nout);

  805.             break;

  806.         case AV_PIX_FMT_RGBA:

  807.             out_rgba(R, G, B, nout);

  808.             break;

  809.         case AV_PIX_FMT_ARGB:

  810.             out_argb(R, G, B, nout);

  811.             break;

  812.         case AV_PIX_FMT_RGB24:

  813.             out_rgb24(R, G, B, nout);

  814.             break;

  815.         case AV_PIX_FMT_BGR24:

  816.             out_bgr24(R, G, B, nout);

  817.             break;

  818.         default:

  819.             /* Unreachable, I think. */

  820.             av_log(c, AV_LOG_ERROR,

  821.                    "altivec_yuv2packedX doesn't support %s output\n",

  822.                    av_get_pix_fmt_name(c->dstFormat));

  823.             return;

  824.         }

  825. 

  826.         memcpy(&((uint32_t *) dest)[i], scratch, (dstW - i) / 4);

  827.     }

  828. }

  829. 

  830. #define YUV2PACKEDX_WRAPPER(suffix, pixfmt)                             \

  831. void ff_yuv2 ## suffix ## _X_altivec(SwsContext *c,                     \

  832.                                      const int16_t *lumFilter,          \

  833.                                      const int16_t **lumSrc,            \

  834.                                      int lumFilterSize,                 \

  835.                                      const int16_t *chrFilter,          \

  836.                                      const int16_t **chrUSrc,           \

  837.                                      const int16_t **chrVSrc,           \

  838.                                      int chrFilterSize,                 \

  839.                                      const int16_t **alpSrc,            \

  840.                                      uint8_t *dest, int dstW, int dstY) \

  841. {                                                                       \

  842.     yuv2packedX_altivec(c, lumFilter, lumSrc, lumFilterSize,            \

  843.                         chrFilter, chrUSrc, chrVSrc,                    \

  844.                         chrFilterSize, alpSrc,                          \

  845.                         dest, dstW, dstY, pixfmt);                      \

  846. }

  847. 

  848. YUV2PACKEDX_WRAPPER(abgr,  AV_PIX_FMT_ABGR);

  849. YUV2PACKEDX_WRAPPER(bgra,  AV_PIX_FMT_BGRA);

  850. YUV2PACKEDX_WRAPPER(argb,  AV_PIX_FMT_ARGB);

  851. YUV2PACKEDX_WRAPPER(rgba,  AV_PIX_FMT_RGBA);

  852. YUV2PACKEDX_WRAPPER(rgb24, AV_PIX_FMT_RGB24);

  853. YUV2PACKEDX_WRAPPER(bgr24, AV_PIX_FMT_BGR24);

  854. 

  855. #endif /* HAVE_ALTIVEC */