/usr/include/spandsp/private/ima_adpcm.h is in libspandsp-dev 0.0.6-2+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | /*
* SpanDSP - a series of DSP components for telephony
*
* private/ima_adpcm.c - Conversion routines between linear 16 bit PCM data
* and IMA/DVI/Intel ADPCM format.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2004 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Based on a bit from here, a bit from there, eye of toad,
* ear of bat, etc - plus, of course, my own 2 cents.
*/
#if !defined(_SPANDSP_PRIVATE_IMA_ADPCM_H_)
#define _SPANDSP_PRIVATE_IMA_ADPCM_H_
/*!
IMA (DVI/Intel) ADPCM conversion state descriptor. This defines the state of
a single working instance of the IMA ADPCM converter. This is used for
either linear to ADPCM or ADPCM to linear conversion.
*/
struct ima_adpcm_state_s
{
int variant;
/*! \brief The size of a chunk, in samples. */
int chunk_size;
/*! \brief The last state of the ADPCM algorithm. */
int last;
/*! \brief Current index into the step size table. */
int step_index;
/*! \brief The current IMA code byte in progress. */
uint16_t ima_byte;
int bits;
};
#endif
/*- End of file ------------------------------------------------------------*/
|