text: /*
   * common code shared by all WMA variants
   *
   * This file is part of Libav.
   *
   * Libav 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.
   *
   * Libav 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 Libav; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #include "libavutil/attributes.h"
  #include "wma_common.h"
  
  /**
   *@brief Get the samples per frame for this stream.
   *@param sample_rate output sample_rate
   *@param version wma version
   *@param decode_flags codec compression features
   *@return log2 of the number of output samples per frame
   */
  av_cold int ff_wma_get_frame_len_bits(int sample_rate, int version,
                                        unsigned int decode_flags)
  {
  
      int frame_len_bits;
  
      if (sample_rate <= 16000) {
          frame_len_bits = 9;
      } else if (sample_rate <= 22050 ||
               (sample_rate <= 32000 && version == 1)) {
          frame_len_bits = 10;
      } else if (sample_rate <= 48000 || version < 3) {
          frame_len_bits = 11;
      } else if (sample_rate <= 96000) {
          frame_len_bits = 12;
      } else {
          frame_len_bits = 13;
      }
  
      if (version == 3) {
          int tmp = decode_flags & 0x6;
          if (tmp == 0x2) {
              ++frame_len_bits;
          } else if (tmp == 0x4) {
              --frame_len_bits;
          } else if (tmp == 0x6) {
              frame_len_bits -= 2;
          }
      }
  
      return frame_len_bits;
  }
  