git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
niklase@google.com
184
modules/audio_coding/codecs/iSAC/main/util/utility.c
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184
modules/audio_coding/codecs/iSAC/main/util/utility.c
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/*
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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 <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "utility.h"
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/* function for reading audio data from PCM file */
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int
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readframe(
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short* data,
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FILE* inp,
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int length)
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{
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short k, rlen, status = 0;
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unsigned char* ptrUChar;
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ptrUChar = (unsigned char*)data;
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rlen = (short)fread(data, sizeof(short), length, inp);
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if (rlen < length) {
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for (k = rlen; k < length; k++)
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data[k] = 0;
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status = 1;
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}
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// Assuming that our PCM files are written in Intel machines
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for(k = 0; k < length; k++)
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{
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data[k] = (short)ptrUChar[k<<1] | ((((short)ptrUChar[(k<<1) + 1]) << 8) & 0xFF00);
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}
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return status;
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}
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short
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readSwitch(
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int argc,
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char* argv[],
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char* strID)
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{
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short n;
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for(n = 0; n < argc; n++)
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{
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if(strcmp(argv[n], strID) == 0)
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{
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return 1;
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}
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}
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return 0;
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}
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double
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readParamDouble(
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int argc,
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char* argv[],
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char* strID,
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double defaultVal)
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{
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double returnVal = defaultVal;
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short n;
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for(n = 0; n < argc; n++)
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{
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if(strcmp(argv[n], strID) == 0)
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{
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n++;
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if(n < argc)
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{
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returnVal = atof(argv[n]);
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}
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break;
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}
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}
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return returnVal;
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}
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int
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readParamInt(
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int argc,
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char* argv[],
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char* strID,
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int defaultVal)
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{
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int returnVal = defaultVal;
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short n;
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for(n = 0; n < argc; n++)
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{
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if(strcmp(argv[n], strID) == 0)
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{
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n++;
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if(n < argc)
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{
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returnVal = atoi(argv[n]);
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}
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break;
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}
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}
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return returnVal;
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}
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int
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readParamString(
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int argc,
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char* argv[],
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char* strID,
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char* stringParam,
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int maxSize)
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{
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int paramLenght = 0;
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short n;
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for(n = 0; n < argc; n++)
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{
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if(strcmp(argv[n], strID) == 0)
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{
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n++;
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if(n < argc)
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{
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strncpy(stringParam, argv[n], maxSize);
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paramLenght = (int)strlen(argv[n]);
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}
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break;
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}
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}
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return paramLenght;
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}
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void
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get_arrival_time(
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int current_framesamples, /* samples */
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int packet_size, /* bytes */
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int bottleneck, /* excluding headers; bits/s */
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BottleNeckModel* BN_data,
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short senderSampFreqHz,
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short receiverSampFreqHz)
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{
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unsigned int travelTimeMs;
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const int headerSizeByte = 35;
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unsigned int dummy;
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int headerRate;
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BN_data->whenPackGeneratedMs += (current_framesamples / (senderSampFreqHz / 1000));
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headerRate = headerSizeByte * 8 * senderSampFreqHz / current_framesamples; /* bits/s */
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/* everything in samples */
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BN_data->sample_count = BN_data->sample_count + current_framesamples;
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//travelTimeMs = ((packet_size + HeaderSize) * 8 * sampFreqHz) /
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// (bottleneck + HeaderRate)
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travelTimeMs = (unsigned int)floor((double)((packet_size + headerSizeByte) * 8 * 1000)
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/ (double)(bottleneck + headerRate) + 0.5);
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if(BN_data->whenPrevPackLeftMs > BN_data->whenPackGeneratedMs)
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{
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BN_data->whenPrevPackLeftMs += travelTimeMs;
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}
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else
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{
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BN_data->whenPrevPackLeftMs = BN_data->whenPackGeneratedMs +
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travelTimeMs;
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}
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dummy = (BN_data->whenPrevPackLeftMs *
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(receiverSampFreqHz / 1000)) - BN_data->arrival_time;
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BN_data->arrival_time = (BN_data->whenPrevPackLeftMs *
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(receiverSampFreqHz / 1000));
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// if (BN_data->arrival_time < BN_data->sample_count)
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// BN_data->arrival_time = BN_data->sample_count;
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BN_data->rtp_number++;
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}
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144
modules/audio_coding/codecs/iSAC/main/util/utility.h
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144
modules/audio_coding/codecs/iSAC/main/util/utility.h
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@@ -0,0 +1,144 @@
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/*
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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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#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_UTIL_UTILITY_H_
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#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_UTIL_UTILITY_H_
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#include <stdlib.h>
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#include <stdio.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#define OPEN_FILE_WB(filePtr, fullPath) \
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do \
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{ \
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if(fullPath != NULL) \
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{ \
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filePtr = fopen(fullPath, "wb"); \
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if(filePtr == NULL) \
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{ \
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printf("could not open %s to write to.", fullPath); \
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return -1; \
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} \
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} \
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else \
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{ \
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filePtr = NULL; \
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} \
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}while(0)
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#define OPEN_FILE_AB(filePtr, fullPath) \
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do \
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{ \
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if(fullPath != NULL) \
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{ \
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filePtr = fopen(fullPath, "ab"); \
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if(filePtr == NULL) \
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{ \
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printf("could not open %s to write to.", fullPath); \
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return -1; \
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} \
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} \
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else \
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{ \
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filePtr = NULL; \
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} \
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}while(0)
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#define OPEN_FILE_RB(filePtr, fullPath) \
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do \
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{ \
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if(fullPath != NULL) \
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{ \
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filePtr = fopen(fullPath, "rb"); \
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if(filePtr == NULL) \
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{ \
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printf("could not open %s to read from.", fullPath); \
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return -1; \
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} \
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} \
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else \
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{ \
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filePtr = NULL; \
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} \
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}while(0)
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#define WRITE_FILE_D(bufferPtr, len, filePtr) \
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do \
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{ \
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if(filePtr != NULL) \
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{ \
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double dummy[1000]; \
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int cntr; \
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for(cntr = 0; cntr < (len); cntr++) \
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{ \
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dummy[cntr] = (double)bufferPtr[cntr]; \
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} \
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fwrite(dummy, sizeof(double), len, filePtr); \
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fflush(filePtr); \
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} \
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} while(0)
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typedef struct {
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unsigned int whenPackGeneratedMs;
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unsigned int whenPrevPackLeftMs;
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unsigned int sendTimeMs ; /* milisecond */
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unsigned int arrival_time; /* samples */
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unsigned int sample_count; /* samples, also used as "send time stamp" */
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unsigned int rtp_number;
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} BottleNeckModel;
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void get_arrival_time(
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int current_framesamples, /* samples */
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int packet_size, /* bytes */
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int bottleneck, /* excluding headers; bits/s */
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BottleNeckModel* BN_data,
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short senderSampFreqHz,
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short receiverSampFreqHz);
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/* function for reading audio data from PCM file */
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int readframe(
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short* data,
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FILE* inp,
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int length);
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short readSwitch(
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int argc,
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char* argv[],
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char* strID);
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double readParamDouble(
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int argc,
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char* argv[],
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char* strID,
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double defaultVal);
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int readParamInt(
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int argc,
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char* argv[],
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char* strID,
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int defaultVal);
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int readParamString(
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int argc,
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char* argv[],
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char* strID,
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char* stringParam,
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int maxSize);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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