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git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

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niklase@google.com
2011-05-30 11:22:19 +00:00
parent 01813fe945
commit 77ae29bc81
1153 changed files with 404089 additions and 0 deletions
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171
modules/audio_coding/codecs/G711/main/source/g711_interface.c Normal file
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/*
* 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 <string.h>
#include "g711.h"
#include "g711_interface.h"
#include "typedefs.h"
WebRtc_Word16 WebRtcG711_EncodeA(void *state,
WebRtc_Word16 *speechIn,
WebRtc_Word16 len,
WebRtc_Word16 *encoded)
{
int n;
WebRtc_UWord16 tempVal, tempVal2;
// Set to avoid getting warnings
state = state;
// Sanity check of input length
if (len < 0) {
return (-1);
}
// Loop over all samples
for (n = 0; n < len; n++) {
tempVal = (WebRtc_UWord16)linear_to_alaw(speechIn[n]);
#ifdef WEBRTC_BIG_ENDIAN
if ((n & 0x1) == 1) {
encoded[n>>1]|=((WebRtc_UWord16)tempVal);
} else {
encoded[n>>1]=((WebRtc_UWord16)tempVal)<<8;
}
#else
if ((n & 0x1) == 1) {
tempVal2 |= ((WebRtc_UWord16) tempVal) << 8;
encoded[n >> 1] |= ((WebRtc_UWord16) tempVal) << 8;
} else {
tempVal2 = ((WebRtc_UWord16) tempVal);
encoded[n >> 1] = ((WebRtc_UWord16) tempVal);
}
#endif
}
return (len);
}
WebRtc_Word16 WebRtcG711_EncodeU(void *state,
WebRtc_Word16 *speechIn,
WebRtc_Word16 len,
WebRtc_Word16 *encoded)
{
int n;
WebRtc_UWord16 tempVal;
// Set to avoid getting warnings
state = state;
// Sanity check of input length
if (len < 0) {
return (-1);
}
// Loop over all samples
for (n = 0; n < len; n++) {
tempVal = (WebRtc_UWord16)linear_to_ulaw(speechIn[n]);
#ifdef WEBRTC_BIG_ENDIAN
if ((n & 0x1) == 1) {
encoded[n>>1]|=((WebRtc_UWord16)tempVal);
} else {
encoded[n>>1]=((WebRtc_UWord16)tempVal)<<8;
}
#else
if ((n & 0x1) == 1) {
encoded[n >> 1] |= ((WebRtc_UWord16) tempVal) << 8;
} else {
encoded[n >> 1] = ((WebRtc_UWord16) tempVal);
}
#endif
}
return (len);
}
WebRtc_Word16 WebRtcG711_DecodeA(void *state,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
int n;
WebRtc_UWord16 tempVal;
// Set to avoid getting warnings
state = state;
// Sanity check of input length
if (len < 0) {
return (-1);
}
for (n = 0; n < len; n++) {
#ifdef WEBRTC_BIG_ENDIAN
if ((n & 0x1) == 1) {
tempVal=((WebRtc_UWord16)encoded[n>>1] & 0xFF);
} else {
tempVal=((WebRtc_UWord16)encoded[n>>1] >> 8);
}
#else
if ((n & 0x1) == 1) {
tempVal = (encoded[n >> 1] >> 8);
} else {
tempVal = (encoded[n >> 1] & 0xFF);
}
#endif
decoded[n] = (WebRtc_Word16) alaw_to_linear(tempVal);
}
*speechType = 1;
return (len);
}
WebRtc_Word16 WebRtcG711_DecodeU(void *state,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType)
{
int n;
WebRtc_UWord16 tempVal;
// Set to avoid getting warnings
state = state;
// Sanity check of input length
if (len < 0) {
return (-1);
}
for (n = 0; n < len; n++) {
#ifdef WEBRTC_BIG_ENDIAN
if ((n & 0x1) == 1) {
tempVal=((WebRtc_UWord16)encoded[n>>1] & 0xFF);
} else {
tempVal=((WebRtc_UWord16)encoded[n>>1] >> 8);
}
#else
if ((n & 0x1) == 1) {
tempVal = (encoded[n >> 1] >> 8);
} else {
tempVal = (encoded[n >> 1] & 0xFF);
}
#endif
decoded[n] = (WebRtc_Word16) ulaw_to_linear(tempVal);
}
*speechType = 1;
return (len);
}
WebRtc_Word16 WebRtcG711_Version(char* version, WebRtc_Word16 lenBytes)
{
strncpy(version, "2.0.0", lenBytes);
return 0;
}