Joonas Rikkonen
94 lines
3.5 KiB
C#
94 lines
3.5 KiB
C#
/* Copyright (c) 2007-2008 CSIRO
|
|
Copyright (c) 2007-2011 Xiph.Org Foundation
|
|
Originally written by Jean-Marc Valin, Gregory Maxwell, Koen Vos,
|
|
Timothy B. Terriberry, and the Opus open-source contributors
|
|
Ported to C# by Logan Stromberg
|
|
|
|
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 Internet Society, IETF or IETF Trust, nor the
|
|
names of specific 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 COPYRIGHT OWNER
|
|
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
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
namespace Concentus.Celt
|
|
{
|
|
internal static class CeltConstants
|
|
{
|
|
public const int Q15ONE = 32767;
|
|
|
|
public const float CELT_SIG_SCALE = 32768.0f;
|
|
|
|
public const int SIG_SHIFT = 12;
|
|
|
|
public const int NORM_SCALING = 16384;
|
|
|
|
public const int DB_SHIFT = 10;
|
|
|
|
public const int EPSILON = 1;
|
|
public const int VERY_SMALL = 0;
|
|
public const short VERY_LARGE16 = ((short)32767);
|
|
public const short Q15_ONE = ((short)32767);
|
|
|
|
public const int COMBFILTER_MAXPERIOD = 1024;
|
|
public const int COMBFILTER_MINPERIOD = 15;
|
|
|
|
// from opus_decode.c
|
|
public const int DECODE_BUFFER_SIZE = 2048;
|
|
|
|
// from modes.c
|
|
/* Alternate tuning (partially derived from Vorbis) */
|
|
public const int BITALLOC_SIZE = 11;
|
|
public const int MAX_PERIOD = 1024;
|
|
|
|
// from static_modes_float.h
|
|
public const int TOTAL_MODES = 1;
|
|
|
|
|
|
// from rate.h
|
|
public const int MAX_PSEUDO = 40;
|
|
public const int LOG_MAX_PSEUDO = 6;
|
|
|
|
public const int CELT_MAX_PULSES = 128;
|
|
|
|
public const int MAX_FINE_BITS = 8;
|
|
|
|
public const int FINE_OFFSET = 21;
|
|
public const int QTHETA_OFFSET = 4;
|
|
public const int QTHETA_OFFSET_TWOPHASE = 16;
|
|
|
|
/* The maximum pitch lag to allow in the pitch-based PLC. It's possible to save
|
|
CPU time in the PLC pitch search by making this smaller than MAX_PERIOD. The
|
|
current value corresponds to a pitch of 66.67 Hz. */
|
|
public const int PLC_PITCH_LAG_MAX = 720;
|
|
|
|
/* The minimum pitch lag to allow in the pitch-based PLC. This corresponds to a
|
|
pitch of 480 Hz. */
|
|
public const int PLC_PITCH_LAG_MIN = 100;
|
|
|
|
public const int LPC_ORDER = 24;
|
|
}
|
|
}
|