1 /* Copyright (c) 2007-2008 CSIRO
2    Copyright (c) 2007-2009 Xiph.Org Foundation
3    Copyright (c) 2008 Gregory Maxwell
4    Written by Jean-Marc Valin and Gregory Maxwell */
5 /*
6    Redistribution and use in source and binary forms, with or without
7    modification, are permitted provided that the following conditions
8    are met:
9 
10    - Redistributions of source code must retain the above copyright
11    notice, this list of conditions and the following disclaimer.
12 
13    - Redistributions in binary form must reproduce the above copyright
14    notice, this list of conditions and the following disclaimer in the
15    documentation and/or other materials provided with the distribution.
16 
17    - Neither the name of the Xiph.org Foundation nor the names of its
18    contributors may be used to endorse or promote products derived from
19    this software without specific prior written permission.
20 
21    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
25    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 
34 #ifndef MODES_H
35 #define MODES_H
36 
37 #include "celt_types.h"
38 #include "celt.h"
39 #include "arch.h"
40 #include "mdct.h"
41 #include "pitch.h"
42 
43 #define CELT_BITSTREAM_VERSION 0x8000000b
44 
45 #ifdef STATIC_MODES
46 #include "static_modes.h"
47 #endif
48 
49 #define MAX_PERIOD 1024
50 
51 #ifndef MCHANNELS
52 # ifdef DISABLE_STEREO
53 #  define MCHANNELS(mode) (1)
54 # else
55 #  define MCHANNELS(mode) ((mode)->nbChannels)
56 # endif
57 #endif
58 
59 #ifndef CHANNELS
60 # ifdef DISABLE_STEREO
61 #  define CHANNELS(_C) (1)
62 # else
63 #  define CHANNELS(_C) (_C)
64 # endif
65 #endif
66 
67 #define MDCT(mode) (&(mode)->mdct)
68 
69 #ifndef OVERLAP
70 #define OVERLAP(mode) ((mode)->overlap)
71 #endif
72 
73 #ifndef FRAMESIZE
74 #define FRAMESIZE(mode) ((mode)->mdctSize)
75 #endif
76 
77 /** Mode definition (opaque)
78  @brief Mode definition
79  */
80 struct CELTMode {
81    celt_uint32 marker_start;
82    celt_int32 Fs;
83    int          overlap;
84    int          mdctSize;
85 
86    int          nbEBands;
87    int          pitchEnd;
88 
89    const celt_int16   *eBands;   /**< Definition for each "pseudo-critical band" */
90 
91    celt_word16 ePredCoef;/**< Prediction coefficient for the energy encoding */
92 
93    int          nbAllocVectors; /**< Number of lines in the matrix below */
94    const celt_int16   *allocVectors;   /**< Number of bits in each band for several rates */
95 
96    const celt_int16 * const *bits; /**< Cache for pulses->bits mapping in each band */
97 
98    /* Stuff that could go in the {en,de}coder, but we save space this way */
99    mdct_lookup mdct;
100 
101    const celt_word16 *window;
102 
103    int         nbShortMdcts;
104    int         shortMdctSize;
105    mdct_lookup shortMdct;
106    const celt_word16 *shortWindow;
107 
108    int *prob;
109    celt_uint32 marker_end;
110 };
111 
112 int check_mode(const CELTMode *mode);
113 
114 #endif
115