/*

  * DCA compatible decoder data

  * Copyright (C) 2004 Gildas Bazin
  * Copyright (C) 2004 Benjamin Zores
  * Copyright (C) 2006 Benjamin Larsson
  * Copyright (C) 2007 Konstantin Shishkov
  *
  * 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 <stdint.h>

 #include <string.h>

 #include "libavutil/error.h"
 

 #include "dca.h"

 #include "dca_syncwords.h"

 #include "put_bits.h"

 const uint32_t avpriv_dca_sample_rates[16] = {

     0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
     12000, 24000, 48000, 96000, 192000

 };

 int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,

                              int max_size)
 {
     uint32_t mrk;
     int i, tmp;
     const uint16_t *ssrc = (const uint16_t *) src;
     uint16_t *sdst = (uint16_t *) dst;
     PutBitContext pb;
 
     if ((unsigned) src_size > (unsigned) max_size)
         src_size = max_size;
 
     mrk = AV_RB32(src);
     switch (mrk) {

     case DCA_SYNCWORD_CORE_BE:

         memcpy(dst, src, src_size);
         return src_size;

     case DCA_SYNCWORD_CORE_LE:

         for (i = 0; i < (src_size + 1) >> 1; i++)
             *sdst++ = av_bswap16(*ssrc++);
         return src_size;

     case DCA_SYNCWORD_CORE_14B_BE:
     case DCA_SYNCWORD_CORE_14B_LE:

         init_put_bits(&pb, dst, max_size);
         for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {

             tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;

             put_bits(&pb, 14, tmp);
         }
         flush_put_bits(&pb);
         return (put_bits_count(&pb) + 7) >> 3;
     default:
         return AVERROR_INVALIDDATA;
     }
 }