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  1. /*
  2.  * Copyright (c) 2014 RISC OS Open Ltd
  3.  * Author: Ben Avison <bavison@riscosopen.org>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include <stdint.h>
  23.  
  24. #include "libavutil/arm/cpu.h"
  25. #include "libavutil/attributes.h"
  26. #include "libavcodec/mlpdsp.h"
  27.  
  28. void ff_mlp_filter_channel_arm(int32_t *state, const int32_t *coeff,
  29.                                int firorder, int iirorder,
  30.                                unsigned int filter_shift, int32_t mask,
  31.                                int blocksize, int32_t *sample_buffer);
  32. void ff_mlp_rematrix_channel_arm(int32_t *samples,
  33.                                  const int32_t *coeffs,
  34.                                  const uint8_t *bypassed_lsbs,
  35.                                  const int8_t *noise_buffer,
  36.                                  int index,
  37.                                  unsigned int dest_ch,
  38.                                  uint16_t blockpos,
  39.                                  unsigned int maxchan,
  40.                                  int matrix_noise_shift,
  41.                                  int access_unit_size_pow2,
  42.                                  int32_t mask);
  43.  
  44. #define DECLARE_PACK(order,channels,shift) \
  45.     int32_t ff_mlp_pack_output_##order##order_##channels##ch_##shift##shift_armv6(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int);
  46. #define ENUMERATE_PACK(order,channels,shift) \
  47.     ff_mlp_pack_output_##order##order_##channels##ch_##shift##shift_armv6,
  48. #define PACK_CHANNELS(macro,order,channels) \
  49.         macro(order,channels,0) \
  50.         macro(order,channels,1) \
  51.         macro(order,channels,2) \
  52.         macro(order,channels,3) \
  53.         macro(order,channels,4) \
  54.         macro(order,channels,5) \
  55.         macro(order,channels,mixed)
  56. #define PACK_ORDER(macro,order) \
  57.         PACK_CHANNELS(macro,order,2) \
  58.         PACK_CHANNELS(macro,order,6) \
  59.         PACK_CHANNELS(macro,order,8)
  60. #define PACK_ALL(macro) \
  61.         PACK_ORDER(macro,outof) \
  62.         PACK_ORDER(macro,in)
  63. PACK_ALL(DECLARE_PACK)
  64.  
  65. #define ff_mlp_pack_output_outoforder_2ch_mixedshift_armv6 0
  66. #define ff_mlp_pack_output_outoforder_6ch_mixedshift_armv6 0
  67. #define ff_mlp_pack_output_outoforder_8ch_mixedshift_armv6 0
  68. #if CONFIG_THUMB
  69. #define ff_mlp_pack_output_outoforder_2ch_0shift_armv6 0
  70. #define ff_mlp_pack_output_outoforder_2ch_1shift_armv6 0
  71. #define ff_mlp_pack_output_outoforder_2ch_2shift_armv6 0
  72. #define ff_mlp_pack_output_outoforder_2ch_3shift_armv6 0
  73. #define ff_mlp_pack_output_outoforder_2ch_4shift_armv6 0
  74. #define ff_mlp_pack_output_outoforder_2ch_5shift_armv6 0
  75. #define ff_mlp_pack_output_outoforder_6ch_0shift_armv6 0
  76. #define ff_mlp_pack_output_outoforder_6ch_1shift_armv6 0
  77. #define ff_mlp_pack_output_outoforder_6ch_2shift_armv6 0
  78. #define ff_mlp_pack_output_outoforder_6ch_3shift_armv6 0
  79. #define ff_mlp_pack_output_outoforder_6ch_4shift_armv6 0
  80. #define ff_mlp_pack_output_outoforder_6ch_5shift_armv6 0
  81. #define ff_mlp_pack_output_outoforder_8ch_0shift_armv6 0
  82. #define ff_mlp_pack_output_outoforder_8ch_1shift_armv6 0
  83. #define ff_mlp_pack_output_outoforder_8ch_2shift_armv6 0
  84. #define ff_mlp_pack_output_outoforder_8ch_3shift_armv6 0
  85. #define ff_mlp_pack_output_outoforder_8ch_4shift_armv6 0
  86. #define ff_mlp_pack_output_outoforder_8ch_5shift_armv6 0
  87. #endif
  88.  
  89. static int32_t (*mlp_select_pack_output_armv6(uint8_t *ch_assign,
  90.                                               int8_t *output_shift,
  91.                                               uint8_t max_matrix_channel,
  92.                                               int is32))(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int)
  93. {
  94.     int ch_index;
  95.     int shift = output_shift[0] < 0 || output_shift[0] > 5 ? 6 : output_shift[0];
  96.     int inorder = 1;
  97.     static int32_t (*const routine[2*3*7])(int32_t, uint16_t, int32_t (*)[], void *, uint8_t*, int8_t *, uint8_t, int) = {
  98.             PACK_ALL(ENUMERATE_PACK)
  99.     };
  100.     int i;
  101.  
  102.     if (!is32) // don't support 16-bit output (it's not used by TrueHD)
  103.         return ff_mlp_pack_output;
  104.  
  105.     switch (max_matrix_channel) {
  106.     case 1:
  107.         ch_index = 0;
  108.         break;
  109.     case 5:
  110.         ch_index = 1;
  111.         break;
  112.     case 7:
  113.         ch_index = 2;
  114.         break;
  115.     default:
  116.         return ff_mlp_pack_output;
  117.     }
  118.  
  119.     for (i = 0; i <= max_matrix_channel; i++) {
  120.         if (shift != 6 && output_shift[i] != shift)
  121.             shift = 6; // indicate mixed shifts
  122.         if (ch_assign[i] != i)
  123.             inorder = 0;
  124.     }
  125. #if CONFIG_THUMB
  126.     if (!inorder)
  127.         return ff_mlp_pack_output; // can't currently handle an order array except in ARM mode
  128. #else
  129.     if (shift == 6 && !inorder)
  130.         return ff_mlp_pack_output; // can't currently handle both an order array and a shift array
  131. #endif
  132.  
  133.     return routine[(inorder*3+ch_index)*7+shift];
  134. }
  135.  
  136. av_cold void ff_mlpdsp_init_arm(MLPDSPContext *c)
  137. {
  138.     int cpu_flags = av_get_cpu_flags();
  139.  
  140.     if (have_armv5te(cpu_flags)) {
  141.         c->mlp_filter_channel = ff_mlp_filter_channel_arm;
  142.         c->mlp_rematrix_channel = ff_mlp_rematrix_channel_arm;
  143.     }
  144.     if (have_armv6(cpu_flags))
  145.         c->mlp_select_pack_output = mlp_select_pack_output_armv6;
  146. }
  147.