172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <string.h>
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#include "g711.h"
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#include "g711_interface.h"
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#include "typedefs.h"
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WebRtc_Word16 WebRtcG711_EncodeA(void *state,
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WebRtc_Word16 *speechIn,
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WebRtc_Word16 len,
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WebRtc_Word16 *encoded)
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{
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int n;
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WebRtc_UWord16 tempVal, tempVal2;
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// Set to avoid getting warnings
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state = state;
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// Sanity check of input length
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if (len < 0) {
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return (-1);
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}
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// Loop over all samples
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for (n = 0; n < len; n++) {
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tempVal = (WebRtc_UWord16)linear_to_alaw(speechIn[n]);
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#ifdef WEBRTC_BIG_ENDIAN
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if ((n & 0x1) == 1) {
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encoded[n>>1]|=((WebRtc_UWord16)tempVal);
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} else {
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encoded[n>>1]=((WebRtc_UWord16)tempVal)<<8;
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}
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#else
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if ((n & 0x1) == 1) {
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tempVal2 |= ((WebRtc_UWord16) tempVal) << 8;
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encoded[n >> 1] |= ((WebRtc_UWord16) tempVal) << 8;
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} else {
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tempVal2 = ((WebRtc_UWord16) tempVal);
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encoded[n >> 1] = ((WebRtc_UWord16) tempVal);
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}
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#endif
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}
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return (len);
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}
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WebRtc_Word16 WebRtcG711_EncodeU(void *state,
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WebRtc_Word16 *speechIn,
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WebRtc_Word16 len,
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WebRtc_Word16 *encoded)
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{
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int n;
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WebRtc_UWord16 tempVal;
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// Set to avoid getting warnings
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state = state;
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// Sanity check of input length
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if (len < 0) {
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return (-1);
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}
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// Loop over all samples
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for (n = 0; n < len; n++) {
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tempVal = (WebRtc_UWord16)linear_to_ulaw(speechIn[n]);
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#ifdef WEBRTC_BIG_ENDIAN
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if ((n & 0x1) == 1) {
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encoded[n>>1]|=((WebRtc_UWord16)tempVal);
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} else {
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encoded[n>>1]=((WebRtc_UWord16)tempVal)<<8;
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}
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#else
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if ((n & 0x1) == 1) {
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encoded[n >> 1] |= ((WebRtc_UWord16) tempVal) << 8;
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} else {
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encoded[n >> 1] = ((WebRtc_UWord16) tempVal);
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}
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#endif
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}
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return (len);
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}
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WebRtc_Word16 WebRtcG711_DecodeA(void *state,
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WebRtc_Word16 *encoded,
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WebRtc_Word16 len,
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WebRtc_Word16 *decoded,
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WebRtc_Word16 *speechType)
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{
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int n;
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WebRtc_UWord16 tempVal;
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// Set to avoid getting warnings
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state = state;
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// Sanity check of input length
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if (len < 0) {
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return (-1);
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}
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for (n = 0; n < len; n++) {
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#ifdef WEBRTC_BIG_ENDIAN
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if ((n & 0x1) == 1) {
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tempVal=((WebRtc_UWord16)encoded[n>>1] & 0xFF);
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} else {
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tempVal=((WebRtc_UWord16)encoded[n>>1] >> 8);
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}
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#else
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if ((n & 0x1) == 1) {
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tempVal = (encoded[n >> 1] >> 8);
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} else {
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tempVal = (encoded[n >> 1] & 0xFF);
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}
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#endif
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decoded[n] = (WebRtc_Word16) alaw_to_linear(tempVal);
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}
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*speechType = 1;
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return (len);
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}
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WebRtc_Word16 WebRtcG711_DecodeU(void *state,
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WebRtc_Word16 *encoded,
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WebRtc_Word16 len,
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WebRtc_Word16 *decoded,
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WebRtc_Word16 *speechType)
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{
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int n;
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WebRtc_UWord16 tempVal;
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// Set to avoid getting warnings
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state = state;
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// Sanity check of input length
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if (len < 0) {
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return (-1);
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}
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for (n = 0; n < len; n++) {
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#ifdef WEBRTC_BIG_ENDIAN
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if ((n & 0x1) == 1) {
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tempVal=((WebRtc_UWord16)encoded[n>>1] & 0xFF);
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} else {
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tempVal=((WebRtc_UWord16)encoded[n>>1] >> 8);
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}
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#else
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if ((n & 0x1) == 1) {
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tempVal = (encoded[n >> 1] >> 8);
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} else {
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tempVal = (encoded[n >> 1] & 0xFF);
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}
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#endif
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decoded[n] = (WebRtc_Word16) ulaw_to_linear(tempVal);
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}
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*speechType = 1;
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return (len);
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}
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WebRtc_Word16 WebRtcG711_Version(char* version, WebRtc_Word16 lenBytes)
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{
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strncpy(version, "2.0.0", lenBytes);
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return 0;
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}
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