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ffmpeg-4.2.2/libavcodec/mpegaudiodsp.c 1.85 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * Copyright (c) 2011 Mans Rullgard
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #include "config.h"
  #include "libavutil/attributes.h"
  #include "libavutil/thread.h"
  #include "mpegaudiodsp.h"
  #include "dct.h"
  #include "dct32.h"
  
  static AVOnce mpadsp_float_table_init = AV_ONCE_INIT;
  static AVOnce mpadsp_fixed_table_init = AV_ONCE_INIT;
  
  av_cold void ff_mpadsp_init(MPADSPContext *s)
  {
      DCTContext dct;
  
      ff_dct_init(&dct, 5, DCT_II);
      ff_thread_once(&mpadsp_float_table_init, &ff_init_mpadsp_tabs_float);
      ff_thread_once(&mpadsp_fixed_table_init, &ff_init_mpadsp_tabs_fixed);
  
      s->apply_window_float = ff_mpadsp_apply_window_float;
      s->apply_window_fixed = ff_mpadsp_apply_window_fixed;
  
      s->dct32_float = dct.dct32;
      s->dct32_fixed = ff_dct32_fixed;
  
      s->imdct36_blocks_float = ff_imdct36_blocks_float;
      s->imdct36_blocks_fixed = ff_imdct36_blocks_fixed;
  
      if (ARCH_AARCH64) ff_mpadsp_init_aarch64(s);
      if (ARCH_ARM)     ff_mpadsp_init_arm(s);
      if (ARCH_PPC)     ff_mpadsp_init_ppc(s);
      if (ARCH_X86)     ff_mpadsp_init_x86(s);
      if (HAVE_MIPSFPU)   ff_mpadsp_init_mipsfpu(s);
      if (HAVE_MIPSDSP) ff_mpadsp_init_mipsdsp(s);
  }