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  1. /*
  2.  * ARM optimized Format Conversion Utils
  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 <stdint.h>
  22.  
  23. #include "libavutil/attributes.h"
  24. #include "libavutil/arm/cpu.h"
  25. #include "libavcodec/avcodec.h"
  26. #include "libavcodec/fmtconvert.h"
  27.  
  28. void ff_int32_to_float_fmul_scalar_neon(float *dst, const int32_t *src,
  29.                                         float mul, int len);
  30.  
  31. void ff_int32_to_float_fmul_scalar_vfp(float *dst, const int32_t *src,
  32.                                        float mul, int len);
  33. void ff_int32_to_float_fmul_array8_vfp(FmtConvertContext *c, float *dst,
  34.                                        const int32_t *src, const float *mul,
  35.                                        int len);
  36.  
  37. void ff_float_to_int16_neon(int16_t *dst, const float *src, long len);
  38. void ff_float_to_int16_interleave_neon(int16_t *, const float **, long, int);
  39.  
  40. void ff_float_to_int16_vfp(int16_t *dst, const float *src, long len);
  41.  
  42. av_cold void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx)
  43. {
  44.     int cpu_flags = av_get_cpu_flags();
  45.  
  46.     if (have_vfp(cpu_flags)) {
  47.         if (!have_vfpv3(cpu_flags)) {
  48.             c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_vfp;
  49.             c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_vfp;
  50.         }
  51.  
  52.         if (have_armv6(cpu_flags)) {
  53.             c->float_to_int16 = ff_float_to_int16_vfp;
  54.         }
  55.     }
  56.  
  57.     if (have_neon(cpu_flags)) {
  58.         c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_neon;
  59.  
  60.         if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
  61.             c->float_to_int16            = ff_float_to_int16_neon;
  62.             c->float_to_int16_interleave = ff_float_to_int16_interleave_neon;
  63.         }
  64.     }
  65. }
  66.