adaptive_golomb_channel.c

spiht for linux this is used to decod and encode vedio i wich all enjoy

/*
 * 
 * QccPack: Quantization, compression, and coding libraries
 * Copyright (C) 1997-2009  James E. Fowler
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
 * MA 02139, USA.
 * 
 */

/*
 *  This code was written by Yufei Yuan <[e-mail]>
 */

#include "libQccPack.h"


int QccENTAdaptiveGolombEncodeChannel(const QccChannel *channel,
                                      QccBitBuffer *output_buffer)
{
    int return_value;
    int symbol;

    if (channel == NULL)
      return(0);
    if (output_buffer == NULL)
      return(0);
    
    if (channel->channel_symbols == NULL)
      return(0);

    for (symbol = 0; symbol < QccChannelGetBlockSize(channel); symbol++)
      if ((channel->channel_symbols[symbol] != 
           QCCENTADAPTIVEGOLOMB_RUN_SYMBOL) &&
          (channel->channel_symbols[symbol] !=
           QCCENTADAPTIVEGOLOMB_STOP_SYMBOL))
        {
          QccErrorAddMessage("(QccENTAdaptiveGolombEncodeChannel): Invalid symbol encountered in channel");
          goto Error;
        }

    if (QccENTAdaptiveGolombEncode(output_buffer,
                                   channel->channel_symbols,
                                   QccChannelGetBlockSize(channel)))
      {
        QccErrorAddMessage("(QccENTAdaptiveGolombEncodeChannel): Error calling QccENTAdaptiveGolombEncode()");
        goto Error;
      }

    return_value = 0;
    goto Return;

Error:
    return_value = 1;
Return:
    return(return_value);
}


int QccENTAdaptiveGolombDecodeChannel(QccBitBuffer *input_buffer,
                                      const QccChannel *channel)
{
    int return_value;
    
    if (QccENTAdaptiveGolombDecode(input_buffer,
                                   channel->channel_symbols,
                                   QccChannelGetBlockSize(channel)))
      {
        QccErrorAddMessage("(QccENTAdaptiveGolombDecodeChannel): Error calling QccENTAdaptiveGolombDecode()");
        goto Error;
      }

    return_value = 0;
    goto Return;
Error:
    return_value = 1;
Return:
    return(return_value);
}