chromium/third_party/webrtc/modules/third_party/g722/g722_encode.c

/*
 * SpanDSP - a series of DSP components for telephony
 *
 * g722_encode.c - The ITU G.722 codec, encode part.
 *
 * Written by Steve Underwood <[email protected]>
 *
 * Copyright (C) 2005 Steve Underwood
 *
 * All rights reserved.
 *
 *  Despite my general liking of the GPL, I place my own contributions
 *  to this code in the public domain for the benefit of all mankind -
 *  even the slimy ones who might try to proprietize my work and use it
 *  to my detriment.
 *
 * Based on a single channel 64kbps only G.722 codec which is:
 *
 *****    Copyright (c) CMU    1993      *****
 * Computer Science, Speech Group
 * Chengxiang Lu and Alex Hauptmann
 *
 * $Id: g722_encode.c,v 1.14 2006/07/07 16:37:49 steveu Exp $
 *
 * Modifications for WebRtc, 2011/04/28, by tlegrand:
 * -Removed usage of inttypes.h and tgmath.h
 * -Changed to use WebRtc types
 * -Added option to run encoder bitexact with ITU-T reference implementation
 */

/*! \file */

#include <memory.h>
#include <stdio.h>
#include <stdlib.h>

#include "modules/third_party/g722/g722_enc_dec.h"

#if !defined(FALSE)
#define FALSE …
#endif
#if !defined(TRUE)
#define TRUE …
#endif

static __inline int16_t saturate(int32_t amp)
{ … }
/*- End of function --------------------------------------------------------*/

static void block4(G722EncoderState *s, int band, int d)
{ … }
/*- End of function --------------------------------------------------------*/

G722EncoderState* WebRtc_g722_encode_init(G722EncoderState* s,
                                          int rate,
                                          int options) { … }
/*- End of function --------------------------------------------------------*/

int WebRtc_g722_encode_release(G722EncoderState *s)
{ … }
/*- End of function --------------------------------------------------------*/

/* WebRtc, tlegrand:
 * Only define the following if bit-exactness with reference implementation
 * is needed. Will only have any effect if input signal is saturated.
 */
//#define RUN_LIKE_REFERENCE_G722
#ifdef RUN_LIKE_REFERENCE_G722
int16_t limitValues (int16_t rl)
{

    int16_t yl;

    yl = (rl > 16383) ? 16383 : ((rl < -16384) ? -16384 : rl);

    return (yl);
}
#endif

size_t WebRtc_g722_encode(G722EncoderState *s, uint8_t g722_data[],
                          const int16_t amp[], size_t len)
{ … }
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/