mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-28 18:57:43 +00:00
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
|
|
#include "pcm16b.h"
|
|
|
|
#include <stdlib.h>
|
|
#ifdef WEBRTC_ARCH_BIG_ENDIAN
|
|
#include <string.h>
|
|
#endif
|
|
|
|
#include "typedefs.h"
|
|
|
|
#define HIGHEND 0xFF00
|
|
#define LOWEND 0xFF
|
|
|
|
|
|
|
|
/* Encoder with int16_t Output */
|
|
int16_t WebRtcPcm16b_EncodeW16(const int16_t* speechIn16b,
|
|
int16_t length_samples,
|
|
int16_t* speechOut16b)
|
|
{
|
|
#ifdef WEBRTC_ARCH_BIG_ENDIAN
|
|
memcpy(speechOut16b, speechIn16b, length_samples * sizeof(int16_t));
|
|
#else
|
|
int i;
|
|
for (i = 0; i < length_samples; i++) {
|
|
speechOut16b[i]=(((uint16_t)speechIn16b[i])>>8)|((((uint16_t)speechIn16b[i])<<8)&0xFF00);
|
|
}
|
|
#endif
|
|
return length_samples << 1;
|
|
}
|
|
|
|
|
|
/* Encoder with char Output (old version) */
|
|
int16_t WebRtcPcm16b_Encode(int16_t *speech16b,
|
|
int16_t len,
|
|
unsigned char *speech8b)
|
|
{
|
|
int16_t samples=len*2;
|
|
int16_t pos;
|
|
int16_t short1;
|
|
int16_t short2;
|
|
for (pos=0;pos<len;pos++) {
|
|
short1=HIGHEND & speech16b[pos];
|
|
short2=LOWEND & speech16b[pos];
|
|
short1=short1>>8;
|
|
speech8b[pos*2]=(unsigned char) short1;
|
|
speech8b[pos*2+1]=(unsigned char) short2;
|
|
}
|
|
return(samples);
|
|
}
|
|
|
|
|
|
/* Decoder with int16_t Input instead of char when the int16_t Encoder is used */
|
|
int16_t WebRtcPcm16b_DecodeW16(void *inst,
|
|
int16_t *speechIn16b,
|
|
int16_t length_bytes,
|
|
int16_t *speechOut16b,
|
|
int16_t* speechType)
|
|
{
|
|
#ifdef WEBRTC_ARCH_BIG_ENDIAN
|
|
memcpy(speechOut16b, speechIn16b, length_bytes);
|
|
#else
|
|
int i;
|
|
int samples = length_bytes >> 1;
|
|
|
|
for (i=0;i<samples;i++) {
|
|
speechOut16b[i]=(((uint16_t)speechIn16b[i])>>8)|(((uint16_t)(speechIn16b[i]&0xFF))<<8);
|
|
}
|
|
#endif
|
|
|
|
*speechType=1;
|
|
|
|
// Avoid warning.
|
|
(void)(inst = NULL);
|
|
|
|
return length_bytes >> 1;
|
|
}
|
|
|
|
/* "old" version of the decoder that uses char as input (not used in NetEq any more) */
|
|
int16_t WebRtcPcm16b_Decode(unsigned char *speech8b,
|
|
int16_t len,
|
|
int16_t *speech16b)
|
|
{
|
|
int16_t samples=len>>1;
|
|
int16_t pos;
|
|
int16_t shortval;
|
|
for (pos=0;pos<samples;pos++) {
|
|
shortval=((unsigned short) speech8b[pos*2]);
|
|
shortval=(shortval<<8)&HIGHEND;
|
|
shortval=shortval|(((unsigned short) speech8b[pos*2+1])&LOWEND);
|
|
speech16b[pos]=shortval;
|
|
}
|
|
return(samples);
|
|
}
|