1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/mm/mmlibs/mmfw/src/server/BaseClasses/Mmfutilities.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,331 @@
1.4 +// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +//
1.18 +
1.19 +#include "MmfUtilities.h"
1.20 +#include "mmfutilitiespriv.h"
1.21 +#include "mmf/utils/rateconvert.h"
1.22 +
1.23 +const TInt KMaxInt16Bit = 65536 ; //Maximum for a 16bit int
1.24 +
1.25 +EXPORT_C CMMFChannelAndSampleRateConverterFactory::~CMMFChannelAndSampleRateConverterFactory()
1.26 + {
1.27 + delete iConverter;
1.28 + }
1.29 +
1.30 +
1.31 +EXPORT_C CMMFChannelAndSampleRateConverter* CMMFChannelAndSampleRateConverterFactory::CreateConverterL(TInt aFromRate,TInt aFromChannels,
1.32 + TInt aToRate,TInt aToChannels)
1.33 + {
1.34 + if(aFromRate<0 || aFromChannels<0 || aToRate<0 || aToChannels<0)
1.35 + {
1.36 + User::Leave(KErrArgument);
1.37 + }
1.38 +
1.39 + iFromRate=aFromRate;
1.40 + iToRate=aToRate;
1.41 + iFromChannels=aFromChannels;
1.42 + iToChannels=aToChannels;
1.43 + return CreateConverterL();
1.44 + }
1.45 +
1.46 +EXPORT_C CMMFChannelAndSampleRateConverter* CMMFChannelAndSampleRateConverterFactory::CreateConverterL()
1.47 + {
1.48 + if (iConverter
1.49 + &&(iFromRate==iConverter->iFromRate)
1.50 + &&(iToRate==iConverter->iToRate)
1.51 + &&(iFromChannels==iConverter->iFromChannels)
1.52 + &&(iToChannels==iConverter->iToChannels))
1.53 + return iConverter;
1.54 +
1.55 + delete iConverter;
1.56 + iConverter=NULL;
1.57 +
1.58 + iConverter = CMMFForwardingChannelAndSampleRateConverter::NewL(iFromRate, iFromChannels, iToRate, iToChannels);
1.59 +
1.60 + return iConverter;
1.61 + }
1.62 +
1.63 +// SetRates kept for BC reasons - populates publically visible properties
1.64 +
1.65 +void CMMFChannelAndSampleRateConverter::SetRates(TInt aFromRate,TInt aFromChannels,
1.66 + TInt aToRate,TInt aToChannels)
1.67 + {
1.68 + iFromRate=aFromRate;
1.69 + iToRate=aToRate;
1.70 + iFromChannels=aFromChannels;
1.71 + iToChannels=aToChannels;
1.72 +
1.73 + iRatio = (TReal)aFromRate / (TReal)aToRate;
1.74 +
1.75 + TInt quotient = (TInt)iRatio;
1.76 + TReal remainder = iRatio - (TReal)quotient;
1.77 + iFraction = quotient * KMaxInt16Bit + (TInt32)(remainder * KMaxInt16Bit);
1.78 +
1.79 + Reset();
1.80 + }
1.81 +
1.82 +//
1.83 +// Forwarding converter - adapt to the implementation in audioutils.
1.84 +//
1.85 +
1.86 +CMMFForwardingChannelAndSampleRateConverter* CMMFForwardingChannelAndSampleRateConverter::NewL(TInt aFromRate,
1.87 + TInt aFromChannels,
1.88 + TInt aToRate,
1.89 + TInt aToChannels)
1.90 + {
1.91 + CMMFForwardingChannelAndSampleRateConverter* self = new (ELeave) CMMFForwardingChannelAndSampleRateConverter;
1.92 + CleanupStack::PushL(self);
1.93 + self->ConstructL(aFromRate,aFromChannels,aToRate,aToChannels);
1.94 + CleanupStack::Pop(self);
1.95 + return self;
1.96 + }
1.97 +
1.98 +CMMFForwardingChannelAndSampleRateConverter::CMMFForwardingChannelAndSampleRateConverter()
1.99 + {
1.100 + }
1.101 +
1.102 +void CMMFForwardingChannelAndSampleRateConverter::ConstructL(TInt aFromRate,
1.103 + TInt aFromChannels,
1.104 + TInt aToRate,
1.105 + TInt aToChannels)
1.106 + {
1.107 + SetRates(aFromRate, aFromChannels, aToRate, aToChannels);
1.108 + // delib called before iRealConverter created. Reset() will be no-op.
1.109 + // this is preserved solely to keep BC with original API that exposes too much
1.110 + iRealConverter = CChannelAndSampleRateConverter::CreateL(aFromRate,aFromChannels,aToRate,aToChannels);
1.111 + }
1.112 +
1.113 +CMMFForwardingChannelAndSampleRateConverter::~CMMFForwardingChannelAndSampleRateConverter()
1.114 + {
1.115 + delete iRealConverter;
1.116 + }
1.117 +
1.118 +TInt CMMFForwardingChannelAndSampleRateConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.119 + {
1.120 + TInt ignore = iRealConverter->Convert(aSrcBuffer.Data(), aDstBuffer.Data());
1.121 + // CChannelAndSampleRateConverter returns the source length converted
1.122 + // while the old API wants the destination generated, so change.
1.123 + TInt result = aDstBuffer.Data().Length();
1.124 + return result;
1.125 + }
1.126 +
1.127 +void CMMFForwardingChannelAndSampleRateConverter::Reset()
1.128 + {
1.129 + // need to check iRealConverter created. Won't be true during construction
1.130 + if (iRealConverter)
1.131 + {
1.132 + iRealConverter->Reset();
1.133 + }
1.134 + }
1.135 +
1.136 +TUint CMMFForwardingChannelAndSampleRateConverter::MaxConvertBufferSize(TUint aSrcBufferSize)
1.137 + {
1.138 + return TUint(iRealConverter->MaxConvertBufferSize(aSrcBufferSize));
1.139 + }
1.140 +
1.141 +//
1.142 +// Old derivatives of CMMFChannelAndSampleRateConverter. These were previously returned by
1.143 +// CreateConverterL(). Kept for BC, but no longer used by main code.
1.144 +//
1.145 +
1.146 +TInt CMMFStereoToStereoRateConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.147 + {
1.148 + TInt32* aSrc = (TInt32*)aSrcBuffer.Data().Ptr();
1.149 + TInt32* aDst = (TInt32*)aDstBuffer.Data().Ptr();
1.150 + TUint aSamples = aSrcBuffer.Data().Length()/4;
1.151 +
1.152 + TInt32* src = aSrc;
1.153 + TInt32* dst = aDst;
1.154 + TInt32* limit=src+aSamples;
1.155 +
1.156 + // add left over from last buffer
1.157 + TUint index = iIndex;
1.158 + src = aSrc + (index>>16);
1.159 +
1.160 + while(src<limit)
1.161 + {
1.162 + *dst++ = *src;
1.163 + index += iFraction;
1.164 + src = aSrc + (index>>16);
1.165 + }
1.166 +
1.167 + // get amount by which index exceeded end of buffer
1.168 + // so that we can add it back to start of next buffer
1.169 + iIndex = index - (aSamples << 16);
1.170 +
1.171 + // return sample byte count and setup output buffer
1.172 + TInt length = (dst-(TInt32*)aDst)*4; //dealing with 32bit values so multiply by 4 for bytes
1.173 + aDstBuffer.Data().SetLength(length); //adjust length of destination buffer
1.174 + return (length);
1.175 + }
1.176 +
1.177 +TInt CMMFMonoToStereoRateConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.178 + {
1.179 + TInt16* aSrc = (TInt16*)aSrcBuffer.Data().Ptr();
1.180 + TInt16* aDst = (TInt16*)aDstBuffer.Data().Ptr();
1.181 + TUint aSamples = aSrcBuffer.Data().Length()/2;
1.182 +
1.183 + TInt16* src = aSrc;
1.184 + TInt16* dst = aDst;
1.185 + TInt16* limit=aSrc+aSamples;
1.186 +
1.187 + // add left over from last buffer
1.188 + TUint index = iIndex;
1.189 + src = aSrc + (index>>16);
1.190 +
1.191 + while(src<limit)
1.192 + {
1.193 + *dst++ = *src;
1.194 + *dst++ = *src;
1.195 + index += iFraction;
1.196 + src = aSrc + (index>>16);
1.197 + }
1.198 +
1.199 + // get amount by which index exceeded end of buffer
1.200 + // so that we can add it back to start of next buffer
1.201 + iIndex = index - (aSamples << 16);
1.202 +
1.203 + // return sample byte count and setup output buffer
1.204 + TInt length = (dst-aDst) * 2; // size in bytes
1.205 + aDstBuffer.Data().SetLength(length); //adjust length of destination buffer
1.206 + return (length);
1.207 + }
1.208 +
1.209 +
1.210 +TUint CMMFMonoToStereoRateConverter::MaxConvertBufferSize(TUint aSrcBufferSize)
1.211 + {
1.212 + return aSrcBufferSize*2;
1.213 + }
1.214 +
1.215 +
1.216 +
1.217 +TInt CMMFMonoToMonoRateConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.218 + {
1.219 + TInt16* aSrc = (TInt16*)aSrcBuffer.Data().Ptr();
1.220 + TInt16* aDst = (TInt16*)aDstBuffer.Data().Ptr();
1.221 + TUint aSamples = aSrcBuffer.Data().Length()/2;
1.222 +
1.223 + TInt16* src = aSrc;
1.224 + TInt16* dst = aDst;
1.225 + TInt16* limit=aSrc+aSamples; //*2 ???
1.226 +
1.227 + // add left over from last buffer
1.228 + TUint index = iIndex;
1.229 + src = aSrc + (index>>16);
1.230 +
1.231 + while(src<limit)
1.232 + {
1.233 + *dst++ = *src;
1.234 + index += iFraction;
1.235 + src = aSrc + (index>>16);
1.236 + }
1.237 +
1.238 + // get amount by which index exceeded end of buffer
1.239 + // so that we can add it back to start of next buffer
1.240 + iIndex = index - (aSamples << 16);
1.241 +
1.242 + // return sample byte count and setup output buffer
1.243 + TInt length = (dst-aDst)*2; // size in bytes
1.244 + aDstBuffer.Data().SetLength(length); //adjust length of destination buffer
1.245 + return (length);
1.246 + }
1.247 +
1.248 +//This method takes the left and right sample of interleaved PCM and sums it, then divides by 2
1.249 +TInt CMMFStereoToMonoRateConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.250 + {
1.251 + TInt16* aSrc = (TInt16*)aSrcBuffer.Data().Ptr();
1.252 + TInt16* aDst = (TInt16*)aDstBuffer.Data().Ptr();
1.253 + TUint aSamples = aSrcBuffer.Data().Length()/4;
1.254 +
1.255 + TInt16* src = aSrc;
1.256 + TInt16* limit=aSrc+aSamples*2; //because 1 sample = two TInt16s
1.257 +
1.258 + // add left over from last buffer
1.259 + TUint index = iIndex;
1.260 + src = aSrc + (index>>16)*2;
1.261 +
1.262 + TInt length = 0;
1.263 +
1.264 + while(src<limit)
1.265 + {
1.266 + *aDst++ = (TInt16)((src[0] + (src[1])) / 2);
1.267 + index += iFraction;
1.268 + src = aSrc + (index>>16)*2;
1.269 + length++;
1.270 + }
1.271 + // get amount by which index exceeded end of buffer
1.272 + // so that we can add it back to start of next buffer
1.273 + iIndex = index - (aSamples << 16);
1.274 +
1.275 + // return sample byte count and setup output buffer
1.276 + aDstBuffer.Data().SetLength(length * 2); //adjust length of destination buffer
1.277 + return (length);
1.278 + }
1.279 +
1.280 +
1.281 +TUint CMMFStereoToMonoRateConverter::MaxConvertBufferSize(TUint aSrcBufferSize)
1.282 + {
1.283 + TUint size = aSrcBufferSize/2;
1.284 + size += aSrcBufferSize & 1; //avoid round down error
1.285 + return size;
1.286 + }
1.287 +
1.288 +//This method takes the left and right sample of interleaved PCM and sums it, then divides by 2
1.289 +TInt CMMFStereoToMonoConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.290 + {
1.291 + TInt16* aSrc = (TInt16*)aSrcBuffer.Data().Ptr();
1.292 + TInt16* aDst = (TInt16*)aDstBuffer.Data().Ptr();
1.293 + TUint aSamples = aSrcBuffer.Data().Length()/4;
1.294 + for (TUint i=0;i<aSamples;i++)
1.295 + {
1.296 + *aDst++ = (TInt16)((aSrc[0] + (aSrc[1])) / 2);
1.297 + aSrc+=2;
1.298 + }
1.299 + aDstBuffer.Data().SetLength(aSamples*2); //adjust length of destination buffer
1.300 + return aSamples*2;
1.301 + }
1.302 +
1.303 +TUint CMMFStereoToMonoConverter::MaxConvertBufferSize(TUint aSrcBufferSize)
1.304 + {
1.305 + TUint size = aSrcBufferSize/2;
1.306 + size += aSrcBufferSize & 1; //avoid round down error
1.307 + return size;
1.308 + }
1.309 +
1.310 +
1.311 +
1.312 +TInt CMMFMonoToStereoConverter::Convert(const CMMFDataBuffer& aSrcBuffer, CMMFDataBuffer& aDstBuffer)
1.313 + {
1.314 + TInt16* aSrc = (TInt16*)aSrcBuffer.Data().Ptr();
1.315 + TInt16* aDst = (TInt16*)aDstBuffer.Data().Ptr();
1.316 + TUint aSamples = aSrcBuffer.Data().Length()/2;
1.317 + for (TUint i=0;i<aSamples;i++)
1.318 + {
1.319 + *aDst++ = *aSrc;
1.320 + *aDst++ = *aSrc++;
1.321 + }
1.322 + aDstBuffer.Data().SetLength(aSamples*4); //adjust length of destination buffer
1.323 + return aSamples*4;
1.324 + }
1.325 +
1.326 +TUint CMMFMonoToStereoConverter::MaxConvertBufferSize(TUint aSrcBufferSize)
1.327 + {
1.328 + return aSrcBufferSize*2;
1.329 + }
1.330 +
1.331 +
1.332 +
1.333 +
1.334 +