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  1. /*
  2.  * ARM-optimized IDCT functions
  3.  * Copyright (c) 2001 Lionel Ulmer
  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/attributes.h"
  25. #include "libavutil/cpu.h"
  26. #include "libavutil/arm/cpu.h"
  27. #include "libavcodec/avcodec.h"
  28. #include "libavcodec/idctdsp.h"
  29. #include "idct.h"
  30. #include "idctdsp_arm.h"
  31.  
  32. void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest,
  33.                                ptrdiff_t line_size);
  34.  
  35. /* XXX: those functions should be suppressed ASAP when all IDCTs are
  36.  * converted */
  37. static void j_rev_dct_arm_put(uint8_t *dest, int line_size, int16_t *block)
  38. {
  39.     ff_j_rev_dct_arm(block);
  40.     ff_put_pixels_clamped(block, dest, line_size);
  41. }
  42.  
  43. static void j_rev_dct_arm_add(uint8_t *dest, int line_size, int16_t *block)
  44. {
  45.     ff_j_rev_dct_arm(block);
  46.     ff_add_pixels_clamped(block, dest, line_size);
  47. }
  48.  
  49. static void simple_idct_arm_put(uint8_t *dest, int line_size, int16_t *block)
  50. {
  51.     ff_simple_idct_arm(block);
  52.     ff_put_pixels_clamped(block, dest, line_size);
  53. }
  54.  
  55. static void simple_idct_arm_add(uint8_t *dest, int line_size, int16_t *block)
  56. {
  57.     ff_simple_idct_arm(block);
  58.     ff_add_pixels_clamped(block, dest, line_size);
  59. }
  60.  
  61. av_cold void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx,
  62.                                  unsigned high_bit_depth)
  63. {
  64.     int cpu_flags = av_get_cpu_flags();
  65.  
  66.     if (!avctx->lowres && !high_bit_depth) {
  67.         if ((avctx->idct_algo == FF_IDCT_AUTO && !(avctx->flags & AV_CODEC_FLAG_BITEXACT)) ||
  68.             avctx->idct_algo == FF_IDCT_ARM) {
  69.             c->idct_put  = j_rev_dct_arm_put;
  70.             c->idct_add  = j_rev_dct_arm_add;
  71.             c->idct      = ff_j_rev_dct_arm;
  72.             c->perm_type = FF_IDCT_PERM_LIBMPEG2;
  73.         } else if (avctx->idct_algo == FF_IDCT_SIMPLEARM) {
  74.             c->idct_put  = simple_idct_arm_put;
  75.             c->idct_add  = simple_idct_arm_add;
  76.             c->idct      = ff_simple_idct_arm;
  77.             c->perm_type = FF_IDCT_PERM_NONE;
  78.         }
  79.     }
  80.  
  81.     c->add_pixels_clamped = ff_add_pixels_clamped_arm;
  82.  
  83.     if (have_armv5te(cpu_flags))
  84.         ff_idctdsp_init_armv5te(c, avctx, high_bit_depth);
  85.     if (have_armv6(cpu_flags))
  86.         ff_idctdsp_init_armv6(c, avctx, high_bit_depth);
  87.     if (have_neon(cpu_flags))
  88.         ff_idctdsp_init_neon(c, avctx, high_bit_depth);
  89. }
  90.