shithub: opus

ref: d35d67754304c8412848c6596ecb5db8f99ae1e0
dir: /libcelt/modes.h/

/* (C) 2007-2008 Jean-Marc Valin, CSIRO
*/
/*
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
   
   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
   
   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
   
   - Neither the name of the Xiph.org Foundation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
   
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MODES_H
#define MODES_H

#include "celt_types.h"
#include "celt.h"
#include "arch.h"
#include "mdct.h"
#include "psy.h"
#include "pitch.h"

#define CELT_BITSTREAM_VERSION 0x8000000b

#ifdef STATIC_MODES
#include "static_modes.h"
#endif

#define MAX_PERIOD 1024

#ifndef MCHANNELS
# ifdef DISABLE_STEREO
#  define MCHANNELS(mode) (1)
# else
#  define MCHANNELS(mode) ((mode)->nbChannels)
# endif
#endif

#ifndef CHANNELS
# ifdef DISABLE_STEREO
#  define CHANNELS(_C) (1)
# else
#  define CHANNELS(_C) (_C)
# endif
#endif

#define MDCT(mode) (&(mode)->mdct)

#ifndef OVERLAP
#define OVERLAP(mode) ((mode)->overlap)
#endif

#ifndef FRAMESIZE
#define FRAMESIZE(mode) ((mode)->mdctSize)
#endif

/** Mode definition (opaque)
 @brief Mode definition 
 */
struct CELTMode {
   celt_uint32_t marker_start;
   celt_int32_t Fs;
   int          overlap;
   int          mdctSize;

   int          nbEBands;
   int          pitchEnd;
   
   const celt_int16_t   *eBands;   /**< Definition for each "pseudo-critical band" */
   
   celt_word16_t ePredCoef;/**< Prediction coefficient for the energy encoding */
   
   int          nbAllocVectors; /**< Number of lines in the matrix below */
   const celt_int16_t   *allocVectors;   /**< Number of bits in each band for several rates */
   
   const celt_int16_t * const *bits; /**< Cache for pulses->bits mapping in each band */

   /* Stuff that could go in the {en,de}coder, but we save space this way */
   mdct_lookup mdct;
   kiss_fftr_cfg fft;

   const celt_word16_t *window;

   int         nbShortMdcts;
   int         shortMdctSize;
   mdct_lookup shortMdct;
   const celt_word16_t *shortWindow;

   struct PsyDecay psy;

   int *prob;
   celt_uint32_t marker_end;
};

int check_mode(const CELTMode *mode);

#endif