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  1. /*
  2.  * This file is part of libswresample.
  3.  *
  4.  * libswresample is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * libswresample is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with libswresample; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #include <stdint.h>
  20.  
  21. #include "config.h"
  22. #include "libavutil/attributes.h"
  23. #include "libavutil/cpu.h"
  24. #include "libavutil/arm/cpu.h"
  25. #include "libavutil/samplefmt.h"
  26. #include "libswresample/swresample_internal.h"
  27. #include "libswresample/audioconvert.h"
  28.  
  29. void swri_oldapi_conv_flt_to_s16_neon(int16_t *dst, const float *src, int len);
  30. void swri_oldapi_conv_fltp_to_s16_2ch_neon(int16_t *dst, float *const *src, int len, int channels);
  31. void swri_oldapi_conv_fltp_to_s16_nch_neon(int16_t *dst, float *const *src, int len, int channels);
  32.  
  33. static void conv_flt_to_s16_neon(uint8_t **dst, const uint8_t **src, int len){
  34.     swri_oldapi_conv_flt_to_s16_neon((int16_t*)*dst, (const float*)*src, len);
  35. }
  36.  
  37. static void conv_fltp_to_s16_2ch_neon(uint8_t **dst, const uint8_t **src, int len){
  38.     swri_oldapi_conv_fltp_to_s16_2ch_neon((int16_t*)*dst, (float *const*)src, len, 2);
  39. }
  40.  
  41. static void conv_fltp_to_s16_nch_neon(uint8_t **dst, const uint8_t **src, int len){
  42.     int channels;
  43.     for(channels=3; channels<SWR_CH_MAX && src[channels]; channels++)
  44.         ;
  45.     swri_oldapi_conv_fltp_to_s16_nch_neon((int16_t*)*dst, (float *const*)src, len, channels);
  46. }
  47.  
  48. av_cold void swri_audio_convert_init_arm(struct AudioConvert *ac,
  49.                                        enum AVSampleFormat out_fmt,
  50.                                        enum AVSampleFormat in_fmt,
  51.                                        int channels)
  52. {
  53.     int cpu_flags = av_get_cpu_flags();
  54.  
  55.     ac->simd_f= NULL;
  56.  
  57.     if (have_neon(cpu_flags)) {
  58.         if(out_fmt == AV_SAMPLE_FMT_S16 && in_fmt == AV_SAMPLE_FMT_FLT || out_fmt == AV_SAMPLE_FMT_S16P && in_fmt == AV_SAMPLE_FMT_FLTP)
  59.             ac->simd_f = conv_flt_to_s16_neon;
  60.         if(out_fmt == AV_SAMPLE_FMT_S16 && in_fmt == AV_SAMPLE_FMT_FLTP && channels == 2)
  61.             ac->simd_f = conv_fltp_to_s16_2ch_neon;
  62.         if(out_fmt == AV_SAMPLE_FMT_S16 && in_fmt == AV_SAMPLE_FMT_FLTP && channels >  2)
  63.             ac->simd_f = conv_fltp_to_s16_nch_neon;
  64.         if(ac->simd_f)
  65.             ac->in_simd_align_mask = ac->out_simd_align_mask = 15;
  66.     }
  67. }
  68.