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  1. /*
  2.  * Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
  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 "rgb2yuv_neon_common.S"
  22.  
  23. /* downsampled R16G16B16 x8 */
  24. alias_qw    r16x8,  q7
  25. alias_qw    g16x8,  q8
  26. alias_qw    b16x8,  q9
  27.  
  28. alias   n16x16_o,   q11
  29. alias   n16x16_ol,  q11_l
  30. alias   n16x16_oh,  q11_h
  31.  
  32. alias   y32x16_el,  q12
  33. alias   y32x16_eh,  q13
  34. alias   y32x16_ol,  q14
  35. alias   y32x16_oh,  q15
  36.  
  37. alias   y16x16_e,   q12
  38. alias   y16x16_el,  q12_l
  39. alias   y16x16_eh,  q12_h
  40. alias   y16x16_o,   q13
  41. alias   y16x16_ol,  q13_l
  42. alias   y16x16_oh,  q13_h
  43.  
  44.  
  45. alias   y8x16,  y16x16_e
  46.  
  47.  
  48. .macro init     src
  49.     // load s32x3x3, narrow to s16x3x3
  50.     vld3.i32    {q13_l, q14_l, q15_l},          [\src]!
  51.     vld3.i32    {q13_h[0], q14_h[0], q15_h[0]}, [\src]
  52.  
  53.     vmovn.i32   CO_R, q13
  54.     vmovn.i32   CO_G, q14
  55.     vmovn.i32   CO_B, q15
  56.  
  57.     vmov.u8     BIAS_Y, #16
  58.     vmov.u8     BIAS_U, #128
  59. .endm
  60.  
  61.  
  62. .macro compute_y_16x1_step  action, s8x16, coeff
  63.     vmov.u8     n16x16_o,   #0
  64.     vtrn.u8     \s8x16,     n16x16_o
  65.  
  66.     \action     y32x16_el,  \s8x16\()_l,    \coeff
  67.     \action     y32x16_eh,  \s8x16\()_h,    \coeff
  68.     \action     y32x16_ol,  n16x16_ol,      \coeff
  69.     \action     y32x16_oh,  n16x16_oh,      \coeff
  70. .endm
  71.  
  72. /*
  73.  * in:      r8x16, g8x16, b8x16
  74.  * out:     y8x16
  75.  * clobber: q11-q15, r8x16, g8x16, b8x16
  76.  */
  77. .macro compute_y_16x1
  78.     compute_y_16x1_step vmull, r8x16, CO_RY
  79.     compute_y_16x1_step vmlal, g8x16, CO_GY
  80.     compute_y_16x1_step vmlal, b8x16, CO_BY
  81.  
  82.     vrshrn.i32  y16x16_el,  y32x16_el,  #15
  83.     vrshrn.i32  y16x16_eh,  y32x16_eh,  #15
  84.     vrshrn.i32  y16x16_ol,  y32x16_ol,  #15
  85.     vrshrn.i32  y16x16_oh,  y32x16_oh,  #15
  86.  
  87.     vtrn.8      y16x16_e,   y16x16_o
  88.     vadd.u8     y8x16,      y8x16,      BIAS_Y
  89. .endm
  90.  
  91. alias   c32x8_l,    q14
  92. alias   c32x8_h,    q15
  93.  
  94. alias_qw    c16x8,  q13
  95. alias_qw    c8x8x2, q10
  96.  
  97. .macro compute_chroma_8x1_step  action, s16x8, coeff
  98.     \action     c32x8_l,    \s16x8\()_l,    \coeff
  99.     \action     c32x8_h,    \s16x8\()_h,    \coeff
  100. .endm
  101.  
  102. /*
  103.  * in:      r16x8, g16x8, b16x8
  104.  * out:     c8x8
  105.  * clobber: q14-q15
  106.  */
  107. .macro compute_chroma_8x1   c, C
  108.     compute_chroma_8x1_step vmull, r16x8, CO_R\C
  109.     compute_chroma_8x1_step vmlal, g16x8, CO_G\C
  110.     compute_chroma_8x1_step vmlal, b16x8, CO_B\C
  111.  
  112.     vrshrn.i32  c16x8_l,    c32x8_l,    #15
  113.     vrshrn.i32  c16x8_h,    c32x8_h,    #15
  114.     vmovn.i16   \c\()8x8,   c16x8
  115.     vadd.u8     \c\()8x8,   \c\()8x8,   BIAS_\C
  116. .endm
  117.  
  118.  
  119.     loop_420sp  rgbx, nv12, init, kernel_420_16x2, 32
  120.