Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright (c) 2002 Falk Hueffner <falk@debian.org>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "libavutil/attributes.h"
  22. #include "libavcodec/idctdsp.h"
  23. #include "idctdsp_alpha.h"
  24. #include "asm.h"
  25.  
  26. void put_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels,
  27.                                 ptrdiff_t line_size);
  28. void add_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels,
  29.                                 ptrdiff_t line_size);
  30.  
  31. void (*put_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels,
  32.                                  ptrdiff_t line_size);
  33. void (*add_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels,
  34.                                  ptrdiff_t line_size);
  35.  
  36. #if 0
  37. /* These functions were the base for the optimized assembler routines,
  38.    and remain here for documentation purposes.  */
  39. static void put_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels,
  40.                                    ptrdiff_t line_size)
  41. {
  42.     int i = 8;
  43.     uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
  44.  
  45.     do {
  46.         uint64_t shorts0, shorts1;
  47.  
  48.         shorts0 = ldq(block);
  49.         shorts0 = maxsw4(shorts0, 0);
  50.         shorts0 = minsw4(shorts0, clampmask);
  51.         stl(pkwb(shorts0), pixels);
  52.  
  53.         shorts1 = ldq(block + 4);
  54.         shorts1 = maxsw4(shorts1, 0);
  55.         shorts1 = minsw4(shorts1, clampmask);
  56.         stl(pkwb(shorts1), pixels + 4);
  57.  
  58.         pixels += line_size;
  59.         block += 8;
  60.     } while (--i);
  61. }
  62.  
  63. void add_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels,
  64.                             ptrdiff_t line_size)
  65. {
  66.     int h = 8;
  67.     /* Keep this function a leaf function by generating the constants
  68.        manually (mainly for the hack value ;-).  */
  69.     uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
  70.     uint64_t signmask  = zap(-1, 0x33);
  71.     signmask ^= signmask >> 1;  /* 0x8000800080008000 */
  72.  
  73.     do {
  74.         uint64_t shorts0, pix0, signs0;
  75.         uint64_t shorts1, pix1, signs1;
  76.  
  77.         shorts0 = ldq(block);
  78.         shorts1 = ldq(block + 4);
  79.  
  80.         pix0    = unpkbw(ldl(pixels));
  81.         /* Signed subword add (MMX paddw).  */
  82.         signs0  = shorts0 & signmask;
  83.         shorts0 &= ~signmask;
  84.         shorts0 += pix0;
  85.         shorts0 ^= signs0;
  86.         /* Clamp. */
  87.         shorts0 = maxsw4(shorts0, 0);
  88.         shorts0 = minsw4(shorts0, clampmask);
  89.  
  90.         /* Next 4.  */
  91.         pix1    = unpkbw(ldl(pixels + 4));
  92.         signs1  = shorts1 & signmask;
  93.         shorts1 &= ~signmask;
  94.         shorts1 += pix1;
  95.         shorts1 ^= signs1;
  96.         shorts1 = maxsw4(shorts1, 0);
  97.         shorts1 = minsw4(shorts1, clampmask);
  98.  
  99.         stl(pkwb(shorts0), pixels);
  100.         stl(pkwb(shorts1), pixels + 4);
  101.  
  102.         pixels += line_size;
  103.         block += 8;
  104.     } while (--h);
  105. }
  106. #endif
  107.  
  108. av_cold void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx,
  109.                                    unsigned high_bit_depth)
  110. {
  111.     /* amask clears all bits that correspond to present features.  */
  112.     if (amask(AMASK_MVI) == 0) {
  113.         c->put_pixels_clamped = put_pixels_clamped_mvi_asm;
  114.         c->add_pixels_clamped = add_pixels_clamped_mvi_asm;
  115.     }
  116.  
  117.     put_pixels_clamped_axp_p = c->put_pixels_clamped;
  118.     add_pixels_clamped_axp_p = c->add_pixels_clamped;
  119.  
  120.     if (!high_bit_depth && !avctx->lowres &&
  121.         (avctx->idct_algo == FF_IDCT_AUTO ||
  122.          avctx->idct_algo == FF_IDCT_SIMPLEALPHA)) {
  123.         c->idct_put = ff_simple_idct_put_axp;
  124.         c->idct_add = ff_simple_idct_add_axp;
  125.         c->idct =     ff_simple_idct_axp;
  126.     }
  127. }
  128.