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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include "A2dpCodecUtilities.h"
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/**
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A2dp codec utilities Panics
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**/
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enum TA2dpCodecUtilitiesPanic
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{
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EA2dpCodecUtilNoRemoteCodecConfig, //0
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EA2dpCodecUtilUnexpectedDataType, //1
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EA2dpCodecUtilUnsupportedDataType, //2
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EA2dpCodecUtilUnexpectedConfiguration, //3
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EA2dpCodecUtilDataMemberNotSet //4
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};
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static void Panic(TA2dpCodecUtilitiesPanic aPanic)
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// Panic client
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{
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_LIT(KA2dpCodecUtilitiesPanicName, "A2DP Codec Util Panic");
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User::Panic(KA2dpCodecUtilitiesPanicName, aPanic);
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedSBCSampleRates(const TSBCCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedDiscreteRates)
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{
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TInt err = KErrNone;
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TSBCSamplingFrequencyBitmask samplingRatesBitMask = aCodecCaps.SamplingFrequencies();
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if (samplingRatesBitMask & E16kHz)
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{
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err = aSupportedDiscreteRates.Append(16000);
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}
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if (!err && (samplingRatesBitMask & E32kHz))
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{
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err = aSupportedDiscreteRates.Append(32000);
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}
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if (!err && (samplingRatesBitMask & E44100Hz))
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{
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err = aSupportedDiscreteRates.Append(44100);
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}
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if (!err && (samplingRatesBitMask & E48kHz))
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{
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err = aSupportedDiscreteRates.Append(48000);
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}
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return err;
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedMPEG12SampleRates(const TNonSBCCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedDiscreteRates)
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{
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TInt err = KErrNone;
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TPtrC8 codecCapsData(aCodecCaps.CodecData());
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TMPEG12SamplingFrequencyBitmask samplingRatesBitMask = codecCapsData[1] & KA2dpMPEG12SamplingFrequencyMask;
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if (samplingRatesBitMask & EMPEG12_16kHz)
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{
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err = aSupportedDiscreteRates.Append(16000);
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}
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if (!err && samplingRatesBitMask & EMPEG12_22050Hz)
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{
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err = aSupportedDiscreteRates.Append(22050);
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}
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if (!err && samplingRatesBitMask & EMPEG12_24kHz)
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{
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err = aSupportedDiscreteRates.Append(24000);
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}
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if (!err && samplingRatesBitMask & EMPEG12_32kHz)
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{
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err = aSupportedDiscreteRates.Append(32000);
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}
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if (!err && samplingRatesBitMask & EMPEG12_44100Hz)
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{
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err = aSupportedDiscreteRates.Append(44100);
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}
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if (!err && samplingRatesBitMask & EMPEG12_48kHz)
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{
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err = aSupportedDiscreteRates.Append(48000);
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}
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return err;
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedSampleRates(const TAvdtpMediaCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedDiscreteRates)
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{
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TInt err = KErrNotSupported;
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switch(aCodecCaps.MediaCodecType())
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{
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case EAudioCodecSBC:
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err = GetSupportedSBCSampleRates(static_cast<const TSBCCodecCapabilities&>(aCodecCaps), aSupportedDiscreteRates);
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break;
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case EAudioCodecMPEG12Audio:
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err = GetSupportedMPEG12SampleRates(static_cast<const TNonSBCCodecCapabilities&>(aCodecCaps), aSupportedDiscreteRates);
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break;
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case EAudioCodecMPEG24AAC:
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break;
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case EAudioCodecATRAC:
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break;
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default:
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Panic(EA2dpCodecUtilUnexpectedDataType);
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break;
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}
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return err;
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedSBCChannels(const TSBCCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedChannels, TMMFStereoSupport& aStereoSupport)
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{
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TInt err = KErrNotSupported;
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TSBCChannelModeBitmask channelModesBitMask = aCodecCaps.ChannelModes();
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err = GetSupportedChannelsCommonCode(channelModesBitMask, aSupportedChannels, aStereoSupport);
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return err;
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedMPEG12Channels(const TNonSBCCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedChannels, TMMFStereoSupport& aStereoSupport)
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{
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TInt err = KErrNotSupported;
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TPtrC8 codecCapsData(aCodecCaps.CodecData());
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TSBCChannelModeBitmask channelModesBitMask = codecCapsData[0] & KA2dpMPEG12AudioChannelModeMask;
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err = GetSupportedChannelsCommonCode(channelModesBitMask, aSupportedChannels, aStereoSupport);
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return err;
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}
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/**
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MPEG12 uses the same channel mode bit mask as SBC so we'll factor out the common code
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and reuse the TSBCChannelModeBitmask for mp3 as well
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*/
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TInt TA2dpCodecCapabilityParser::GetSupportedChannelsCommonCode(TSBCChannelModeBitmask aChannelModesBitMask, RArray<TUint>& aSupportedChannels, TMMFStereoSupport& aStereoSupport)
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{
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TInt err = KErrNotSupported;
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if (aChannelModesBitMask & EMono)
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{
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err = aSupportedChannels.Append(EMMFMono);
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}
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if (!err)
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{
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if ((aChannelModesBitMask & EStereo) || (aChannelModesBitMask & EJointStereo))
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{
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err = aSupportedChannels.Append(EMMFStereo);
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aStereoSupport = EMMFInterleavedOnly;
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}
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}
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if (!err && (aChannelModesBitMask & EJointStereo))
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{
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//we have to cast as the TMMFStereoSupport is an enumeration
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//but is really should be a bitmap
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//but don't want to change it in order to preserve BC
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TUint aStereoSupportInt = static_cast<TUint>(aStereoSupport);
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aStereoSupportInt |= static_cast<TUint>(EMMFJoint);
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aStereoSupport = static_cast<TMMFStereoSupport>(aStereoSupportInt);
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}
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return err;
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}
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TInt TA2dpCodecCapabilityParser::GetSupportedChannels(const TAvdtpMediaCodecCapabilities& aCodecCaps, RArray<TUint>& aSupportedChannels, TMMFStereoSupport& aStereoSupport)
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{
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TInt err = KErrNotSupported;
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switch(aCodecCaps.MediaCodecType())
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{
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case EAudioCodecSBC:
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err = GetSupportedSBCChannels(static_cast<const TSBCCodecCapabilities&>(aCodecCaps), aSupportedChannels, aStereoSupport);
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break;
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case EAudioCodecMPEG12Audio:
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err = GetSupportedMPEG12Channels(static_cast<const TNonSBCCodecCapabilities&>(aCodecCaps), aSupportedChannels, aStereoSupport);
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break;
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case EAudioCodecMPEG24AAC:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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case EAudioCodecATRAC:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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default:
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Panic(EA2dpCodecUtilUnexpectedDataType);
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break;
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}
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return err;
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}
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/**
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static
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*/
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TUint8 TRTPa2dpCodecSpecificUtils::PayloadType(const TFourCC& aCodecDataType)
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{
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TUint8 payloadType = 0;
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switch(const_cast<TFourCC&>(aCodecDataType).FourCC())
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{
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case KMMFFourCCCodeSBC:
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payloadType = KSbcRTPPayloadType;
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break;
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case KMMFFourCCCodeMP3:
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payloadType = KMPEG12RTPAudioPayloadType;
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break;
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case KMMFFourCCCodeAAC:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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case KMMFFourCCCodeATRAC3:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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default:
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Panic(EA2dpCodecUtilUnexpectedDataType);
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break;
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}
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return payloadType;
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}
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TUint TRTPa2dpCodecSpecificUtils::MediaPayloadHeaderLength(const TFourCC& aCodecDataType)
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{
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TUint mediaPayloadHeaderLength = 0;
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switch(const_cast<TFourCC&>(aCodecDataType).FourCC())
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{
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case KMMFFourCCCodeSBC:
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mediaPayloadHeaderLength = KSbcRTPMediaPayloadHeaderLength;
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break;
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case KMMFFourCCCodeMP3:
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mediaPayloadHeaderLength = KMPEG12RTPMediaPayloadHeaderLength;
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break;
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case KMMFFourCCCodeAAC:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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case KMMFFourCCCodeATRAC3:
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Panic(EA2dpCodecUtilUnsupportedDataType);
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break;
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default:
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Panic(EA2dpCodecUtilUnexpectedDataType);
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break;
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}
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return mediaPayloadHeaderLength;
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}
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TTimeIntervalMicroSeconds32 TFrameTimingUtils::FrameDuration(TUint aFrameLength, TUint aBitRate)
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{
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TUint frameDurationuS = (aFrameLength*8*1000000)/aBitRate;
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return TTimeIntervalMicroSeconds32(frameDurationuS);
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}
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TUint TFrameTimingUtils::CalculateSBCTimeStampIncrementPerFrame(TUint aFrameLength, TUint aBitRate, TUint aSampleRate)
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{
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//SBC uses the sampleRate clock as the timestamp clock A2DP spec 4.3.3.1
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TUint frameDurationuS = FrameDuration(aFrameLength, aBitRate).Int();
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return (frameDurationuS*aSampleRate)/1000000;
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}
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TUint TFrameTimingUtils::CalculateMPEG12TimeStampIncrementPerFrame(TUint aFrameLength, TUint aBitRate)
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{
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//MPEG12 uses a 90Khz clock as the timestamp clock RFC3551 section 4.5.13
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TUint frameDurationuS = FrameDuration(aFrameLength, aBitRate).Int();
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//div 1000000 as frame duration is in microseconds
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return (frameDurationuS*KMPEG12RTPTimeStampClock)/1000000;
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}
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TUint TFrameTimingUtils::TimeStampIncrementPerFrame(const TFourCC& aCodecDataType, TUint aFrameLength, TUint aBitRate, TUint aSampleRate)
|
|
sl@0
|
288 |
{
|
|
sl@0
|
289 |
TInt timeStampIncrement = 0;
|
|
sl@0
|
290 |
switch (const_cast<TFourCC&>(aCodecDataType).FourCC())
|
|
sl@0
|
291 |
{
|
|
sl@0
|
292 |
case KMMFFourCCCodeSBC:
|
|
sl@0
|
293 |
timeStampIncrement = CalculateSBCTimeStampIncrementPerFrame(aFrameLength, aBitRate, aSampleRate);
|
|
sl@0
|
294 |
break;
|
|
sl@0
|
295 |
case KMMFFourCCCodeMP3:
|
|
sl@0
|
296 |
timeStampIncrement = CalculateMPEG12TimeStampIncrementPerFrame(aFrameLength, aBitRate);
|
|
sl@0
|
297 |
break;
|
|
sl@0
|
298 |
case KMMFFourCCCodeAAC:
|
|
sl@0
|
299 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
300 |
break;
|
|
sl@0
|
301 |
case KMMFFourCCCodeATRAC3:
|
|
sl@0
|
302 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
303 |
break;
|
|
sl@0
|
304 |
default:
|
|
sl@0
|
305 |
//the datatype is a non A2DP datatype
|
|
sl@0
|
306 |
//which is not supported so panic
|
|
sl@0
|
307 |
Panic(EA2dpCodecUtilUnexpectedDataType);
|
|
sl@0
|
308 |
break;
|
|
sl@0
|
309 |
}
|
|
sl@0
|
310 |
return timeStampIncrement;
|
|
sl@0
|
311 |
}
|
|
sl@0
|
312 |
|
|
sl@0
|
313 |
|
|
sl@0
|
314 |
CA2dpLocalCodecCapabilities* CA2dpLocalCodecCapabilities::NewL()
|
|
sl@0
|
315 |
{
|
|
sl@0
|
316 |
return new(ELeave) CA2dpLocalCodecCapabilities();
|
|
sl@0
|
317 |
}
|
|
sl@0
|
318 |
|
|
sl@0
|
319 |
|
|
sl@0
|
320 |
CA2dpLocalCodecCapabilities::CA2dpLocalCodecCapabilities()
|
|
sl@0
|
321 |
{
|
|
sl@0
|
322 |
|
|
sl@0
|
323 |
}
|
|
sl@0
|
324 |
|
|
sl@0
|
325 |
|
|
sl@0
|
326 |
CA2dpLocalCodecCapabilities::~CA2dpLocalCodecCapabilities()
|
|
sl@0
|
327 |
{
|
|
sl@0
|
328 |
delete iLocalCodecCapabilities;
|
|
sl@0
|
329 |
}
|
|
sl@0
|
330 |
|
|
sl@0
|
331 |
|
|
sl@0
|
332 |
TAvdtpMediaCodecCapabilities* CA2dpLocalCodecCapabilities::LocalCodecCapabilities(const TFourCC& aCodecDataType)
|
|
sl@0
|
333 |
{
|
|
sl@0
|
334 |
switch(const_cast<TFourCC&>(aCodecDataType).FourCC())
|
|
sl@0
|
335 |
{
|
|
sl@0
|
336 |
case KMMFFourCCCodeSBC:
|
|
sl@0
|
337 |
iLocalCodecCapabilities = LocalSBCCodecCapabilities();
|
|
sl@0
|
338 |
break;
|
|
sl@0
|
339 |
case KMMFFourCCCodeMP3:
|
|
sl@0
|
340 |
iLocalCodecCapabilities = LocalMPEG12CodecCapabilities();
|
|
sl@0
|
341 |
break;
|
|
sl@0
|
342 |
case KMMFFourCCCodeAAC:
|
|
sl@0
|
343 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
344 |
break;
|
|
sl@0
|
345 |
case KMMFFourCCCodeATRAC3:
|
|
sl@0
|
346 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
347 |
break;
|
|
sl@0
|
348 |
default:
|
|
sl@0
|
349 |
Panic(EA2dpCodecUtilUnexpectedDataType);
|
|
sl@0
|
350 |
break;
|
|
sl@0
|
351 |
}
|
|
sl@0
|
352 |
return iLocalCodecCapabilities;
|
|
sl@0
|
353 |
}
|
|
sl@0
|
354 |
|
|
sl@0
|
355 |
|
|
sl@0
|
356 |
TSBCCodecCapabilities* CA2dpLocalCodecCapabilities::LocalSBCCodecCapabilities()
|
|
sl@0
|
357 |
{
|
|
sl@0
|
358 |
delete iLocalCodecCapabilities;
|
|
sl@0
|
359 |
iLocalCodecCapabilities = NULL;
|
|
sl@0
|
360 |
TSBCCodecCapabilities* localSbcCodecCapabilities = new TSBCCodecCapabilities();
|
|
sl@0
|
361 |
if (localSbcCodecCapabilities)
|
|
sl@0
|
362 |
{
|
|
sl@0
|
363 |
localSbcCodecCapabilities->SetSamplingFrequencies(E16kHz|E32kHz|E44100Hz|E48kHz);
|
|
sl@0
|
364 |
localSbcCodecCapabilities->SetChannelModes(EMono|EStereo|EJointStereo);
|
|
sl@0
|
365 |
localSbcCodecCapabilities->SetBlockLengths(EBlockLenFour|EBlockLenEight|EBlockLenTwelve|EBlockLenSixteen);
|
|
sl@0
|
366 |
localSbcCodecCapabilities->SetSubbands(EFourSubbands|EEightSubbands);
|
|
sl@0
|
367 |
localSbcCodecCapabilities->SetAllocationMethods(ELoudness|ESNR);
|
|
sl@0
|
368 |
localSbcCodecCapabilities->SetMinBitpoolValue(KMinBitPoolValue);
|
|
sl@0
|
369 |
localSbcCodecCapabilities->SetMaxBitpoolValue(KMaxBitPoolValue);
|
|
sl@0
|
370 |
}
|
|
sl@0
|
371 |
return localSbcCodecCapabilities;
|
|
sl@0
|
372 |
}
|
|
sl@0
|
373 |
|
|
sl@0
|
374 |
|
|
sl@0
|
375 |
TNonSBCCodecCapabilities* CA2dpLocalCodecCapabilities::LocalMPEG12CodecCapabilities()
|
|
sl@0
|
376 |
{
|
|
sl@0
|
377 |
delete iLocalCodecCapabilities;
|
|
sl@0
|
378 |
iLocalCodecCapabilities = NULL;
|
|
sl@0
|
379 |
TNonSBCCodecCapabilities* localSEPmpeg12CodecCapabilities = new TNonSBCCodecCapabilities(EAvdtpMediaTypeAudio, EAudioCodecMPEG12Audio);
|
|
sl@0
|
380 |
if (localSEPmpeg12CodecCapabilities)
|
|
sl@0
|
381 |
{
|
|
sl@0
|
382 |
TBuf8<4> mpeg12CodecCapabilitiesData;
|
|
sl@0
|
383 |
|
|
sl@0
|
384 |
//MPEG12 channel modes are the same as SBC so we'll use SBC structure
|
|
sl@0
|
385 |
TSBCChannelModeBitmask channelModes = (EMono|EStereo);
|
|
sl@0
|
386 |
mpeg12CodecCapabilitiesData.Append(KA2dpMPEG12LayerMP3Supported | channelModes);
|
|
sl@0
|
387 |
|
|
sl@0
|
388 |
//no MPF-2 support, will support 16-44100khz sample
|
|
sl@0
|
389 |
TInt8 samplingFrequencySupport = EMPEG12_16kHz|EMPEG12_22050Hz|EMPEG12_24kHz|EMPEG12_32kHz|EMPEG12_44100Hz;
|
|
sl@0
|
390 |
mpeg12CodecCapabilitiesData.Append(samplingFrequencySupport);
|
|
sl@0
|
391 |
|
|
sl@0
|
392 |
//no VBR all bitrates <= 96kbs-1 except free format
|
|
sl@0
|
393 |
mpeg12CodecCapabilitiesData.Append(0);
|
|
sl@0
|
394 |
mpeg12CodecCapabilitiesData.Append(KA2dpMPEG12SupportedBitRateIndex);//all bit rates <= 96kbs-1
|
|
sl@0
|
395 |
localSEPmpeg12CodecCapabilities->SetCodecData(mpeg12CodecCapabilitiesData);
|
|
sl@0
|
396 |
}
|
|
sl@0
|
397 |
return localSEPmpeg12CodecCapabilities;
|
|
sl@0
|
398 |
}
|
|
sl@0
|
399 |
|
|
sl@0
|
400 |
|
|
sl@0
|
401 |
|
|
sl@0
|
402 |
CA2dpAudioCodecConfiguration* CA2dpAudioCodecConfiguration::NewL()
|
|
sl@0
|
403 |
{
|
|
sl@0
|
404 |
return new(ELeave)CA2dpAudioCodecConfiguration();
|
|
sl@0
|
405 |
}
|
|
sl@0
|
406 |
|
|
sl@0
|
407 |
|
|
sl@0
|
408 |
CA2dpAudioCodecConfiguration::CA2dpAudioCodecConfiguration() : iHeadsetCodecDataType(KMMFFourCCCodeSBC), iSampleRate(KDefaultSampleRate), iChannels(KDefaultChannels), iStereoSupport(KDefaultStereoSupport)
|
|
sl@0
|
409 |
{
|
|
sl@0
|
410 |
}
|
|
sl@0
|
411 |
|
|
sl@0
|
412 |
CA2dpAudioCodecConfiguration::~CA2dpAudioCodecConfiguration()
|
|
sl@0
|
413 |
{
|
|
sl@0
|
414 |
delete iRemoteCodecConfiguration;
|
|
sl@0
|
415 |
}
|
|
sl@0
|
416 |
|
|
sl@0
|
417 |
|
|
sl@0
|
418 |
void CA2dpAudioCodecConfiguration::Reset()
|
|
sl@0
|
419 |
{
|
|
sl@0
|
420 |
delete iRemoteCodecConfiguration;
|
|
sl@0
|
421 |
iRemoteCodecConfiguration = NULL;
|
|
sl@0
|
422 |
iHeadsetCodecDataType = KMMFFourCCCodeSBC;
|
|
sl@0
|
423 |
iSampleRate = KDefaultSampleRate;
|
|
sl@0
|
424 |
iChannels = KDefaultChannels;
|
|
sl@0
|
425 |
iStereoSupport = KDefaultStereoSupport;
|
|
sl@0
|
426 |
iLocalSBCCodecConfiguration.Reset();
|
|
sl@0
|
427 |
}
|
|
sl@0
|
428 |
|
|
sl@0
|
429 |
/**
|
|
sl@0
|
430 |
Function used to return a TAvdtpMediaCodecCapabilities structure
|
|
sl@0
|
431 |
that can be used to configure the SEP at the remote end ie on the headset
|
|
sl@0
|
432 |
The capabilities are used to determine the configuration
|
|
sl@0
|
433 |
need to return by pointer rather than by ref as TAvdtpMediaCodecCapabilities is abstract
|
|
sl@0
|
434 |
Note that this parameter passed in treats the TAvdtpMediaCodecCapabilities as
|
|
sl@0
|
435 |
the capabilities of the code, whereas the returned TAvdtpMediaCodecCapabilities is a
|
|
sl@0
|
436 |
configuration ie a specific set of values that can be used to configure the remote codec
|
|
sl@0
|
437 |
|
|
sl@0
|
438 |
@param aCodecCapabilities This is the capabilities supported by the remote codec
|
|
sl@0
|
439 |
@return The configuration for the remote codec
|
|
sl@0
|
440 |
*/
|
|
sl@0
|
441 |
//void CA2dpAudioCodecConfiguration::GetRemoteCodecConfiguration(const TAvdtpMediaCodecCapabilities& aRemoteCodecCapabilities, TAvdtpMediaCodecCapabilities& aRemoteCodecConfiguration)
|
|
sl@0
|
442 |
TAvdtpMediaCodecCapabilities* CA2dpAudioCodecConfiguration::UpdateRemoteCodecConfiguration(const TAvdtpMediaCodecCapabilities& aRemoteCodecCapabilities)
|
|
sl@0
|
443 |
{
|
|
sl@0
|
444 |
delete iRemoteCodecConfiguration;
|
|
sl@0
|
445 |
iRemoteCodecConfiguration = NULL;
|
|
sl@0
|
446 |
{
|
|
sl@0
|
447 |
//this hasn't been set yet so set it
|
|
sl@0
|
448 |
//first find out the capabilities of the codec
|
|
sl@0
|
449 |
switch (aRemoteCodecCapabilities.MediaCodecType())
|
|
sl@0
|
450 |
{
|
|
sl@0
|
451 |
case EAudioCodecSBC:
|
|
sl@0
|
452 |
iRemoteCodecConfiguration = GetRemoteSBCCodecConfiguration(static_cast<const TSBCCodecCapabilities&>(aRemoteCodecCapabilities));
|
|
sl@0
|
453 |
iHeadsetCodecDataType = KMMFFourCCCodeSBC;
|
|
sl@0
|
454 |
break;
|
|
sl@0
|
455 |
case EAudioCodecMPEG12Audio:
|
|
sl@0
|
456 |
iRemoteCodecConfiguration = GetRemoteMPEG12CodecConfiguration(static_cast<const TNonSBCCodecCapabilities&>(aRemoteCodecCapabilities));
|
|
sl@0
|
457 |
iHeadsetCodecDataType = KMMFFourCCCodeMP3;
|
|
sl@0
|
458 |
break;
|
|
sl@0
|
459 |
case EAudioCodecMPEG24AAC:
|
|
sl@0
|
460 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
461 |
break;
|
|
sl@0
|
462 |
case EAudioCodecATRAC:
|
|
sl@0
|
463 |
Panic(EA2dpCodecUtilUnsupportedDataType);
|
|
sl@0
|
464 |
break;
|
|
sl@0
|
465 |
default:
|
|
sl@0
|
466 |
//the datatype is a non A2DP datatype
|
|
sl@0
|
467 |
//which is not supported so panic
|
|
sl@0
|
468 |
Panic(EA2dpCodecUtilUnexpectedDataType);
|
|
sl@0
|
469 |
break;
|
|
sl@0
|
470 |
}
|
|
sl@0
|
471 |
}
|
|
sl@0
|
472 |
return iRemoteCodecConfiguration;
|
|
sl@0
|
473 |
}
|
|
sl@0
|
474 |
|
|
sl@0
|
475 |
|
|
sl@0
|
476 |
/**
|
|
sl@0
|
477 |
|
|
sl@0
|
478 |
*/
|
|
sl@0
|
479 |
TSBCCodecCapabilities* CA2dpAudioCodecConfiguration::GetRemoteSBCCodecConfiguration(const TSBCCodecCapabilities& aCodecCaps)
|
|
sl@0
|
480 |
{
|
|
sl@0
|
481 |
TSBCCodecCapabilities* sbcCodecConfiguration = new TSBCCodecCapabilities();
|
|
sl@0
|
482 |
|
|
sl@0
|
483 |
if (sbcCodecConfiguration)
|
|
sl@0
|
484 |
{
|
|
sl@0
|
485 |
//--sampling frequency--
|
|
sl@0
|
486 |
TSBCSamplingFrequencyBitmask freqs;
|
|
sl@0
|
487 |
switch(iSampleRate)
|
|
sl@0
|
488 |
{
|
|
sl@0
|
489 |
case 16000:
|
|
sl@0
|
490 |
freqs = E16kHz;
|
|
sl@0
|
491 |
break;
|
|
sl@0
|
492 |
case 32000:
|
|
sl@0
|
493 |
freqs = E32kHz;
|
|
sl@0
|
494 |
break;
|
|
sl@0
|
495 |
case 44100:
|
|
sl@0
|
496 |
freqs = E44100Hz;
|
|
sl@0
|
497 |
break;
|
|
sl@0
|
498 |
case 48000:
|
|
sl@0
|
499 |
freqs = E48kHz;
|
|
sl@0
|
500 |
break;
|
|
sl@0
|
501 |
default:
|
|
sl@0
|
502 |
freqs = E16kHz;
|
|
sl@0
|
503 |
break;
|
|
sl@0
|
504 |
}
|
|
sl@0
|
505 |
//check we really can support this sampling frequency
|
|
sl@0
|
506 |
//since we may be using the default which may not be supported
|
|
sl@0
|
507 |
//by the headset (even if the A2DP spec says it is mandatory)
|
|
sl@0
|
508 |
TSBCSamplingFrequencyBitmask samplingFreqsSupportedByHeadset = aCodecCaps.SamplingFrequencies();
|
|
sl@0
|
509 |
if (iForcedRemoteSBCCodecConfiguration)
|
|
sl@0
|
510 |
{
|
|
sl@0
|
511 |
samplingFreqsSupportedByHeadset = iForcedRemoteSBCCodecConfiguration->SamplingFrequencies();
|
|
sl@0
|
512 |
}
|
|
sl@0
|
513 |
if (!(freqs & samplingFreqsSupportedByHeadset))
|
|
sl@0
|
514 |
{//then the headset doesn't support the sampling frequency
|
|
sl@0
|
515 |
//this could happen if iSampleRate is a default that the headset doesn't support
|
|
sl@0
|
516 |
//note that evenif the default is a mandatory sample rate eg 44100
|
|
sl@0
|
517 |
//we still do not make any assumptions about what is supported
|
|
sl@0
|
518 |
if (samplingFreqsSupportedByHeadset & E16kHz)
|
|
sl@0
|
519 |
{
|
|
sl@0
|
520 |
iSampleRate = 16000;
|
|
sl@0
|
521 |
freqs = E16kHz;
|
|
sl@0
|
522 |
}
|
|
sl@0
|
523 |
else if (samplingFreqsSupportedByHeadset & E32kHz)
|
|
sl@0
|
524 |
{
|
|
sl@0
|
525 |
iSampleRate = 32000;
|
|
sl@0
|
526 |
freqs = E32kHz;
|
|
sl@0
|
527 |
}
|
|
sl@0
|
528 |
else if (samplingFreqsSupportedByHeadset & E44100Hz)
|
|
sl@0
|
529 |
{
|
|
sl@0
|
530 |
iSampleRate = 44100;
|
|
sl@0
|
531 |
freqs = E44100Hz;
|
|
sl@0
|
532 |
}
|
|
sl@0
|
533 |
else if (samplingFreqsSupportedByHeadset & E48kHz)
|
|
sl@0
|
534 |
{
|
|
sl@0
|
535 |
iSampleRate = 48000;
|
|
sl@0
|
536 |
freqs = E48kHz;
|
|
sl@0
|
537 |
}
|
|
sl@0
|
538 |
//else just keep as is
|
|
sl@0
|
539 |
}
|
|
sl@0
|
540 |
sbcCodecConfiguration->SetSamplingFrequencies(freqs);
|
|
sl@0
|
541 |
|
|
sl@0
|
542 |
//--channels--
|
|
sl@0
|
543 |
TSBCChannelModeBitmask channelMode = EMono;
|
|
sl@0
|
544 |
TSBCChannelModeBitmask channelModesSupportedByHeadset = EMono;
|
|
sl@0
|
545 |
channelModesSupportedByHeadset = aCodecCaps.ChannelModes();
|
|
sl@0
|
546 |
if (iChannels == EMMFMono)
|
|
sl@0
|
547 |
{
|
|
sl@0
|
548 |
channelMode = EMono;
|
|
sl@0
|
549 |
}
|
|
sl@0
|
550 |
else if ((iChannels == EMMFStereo) && (iStereoSupport == EMMFInterleavedOnly))
|
|
sl@0
|
551 |
{
|
|
sl@0
|
552 |
channelMode = EStereo;
|
|
sl@0
|
553 |
}
|
|
sl@0
|
554 |
else if ((iChannels == EMMFStereo) && (iStereoSupport == EMMFJoint))
|
|
sl@0
|
555 |
{
|
|
sl@0
|
556 |
channelMode = EJointStereo;
|
|
sl@0
|
557 |
}
|
|
sl@0
|
558 |
if (!(channelMode & channelModesSupportedByHeadset))
|
|
sl@0
|
559 |
{
|
|
sl@0
|
560 |
//then we don't support the selected channel mode
|
|
sl@0
|
561 |
if (channelModesSupportedByHeadset & EMono)
|
|
sl@0
|
562 |
{
|
|
sl@0
|
563 |
iChannels = EMMFMono;
|
|
sl@0
|
564 |
iStereoSupport = EMMFNone;
|
|
sl@0
|
565 |
channelMode = EMono;
|
|
sl@0
|
566 |
}
|
|
sl@0
|
567 |
else if (channelModesSupportedByHeadset & EJointStereo)
|
|
sl@0
|
568 |
{
|
|
sl@0
|
569 |
iChannels = EMMFStereo;
|
|
sl@0
|
570 |
iStereoSupport = EMMFJoint;
|
|
sl@0
|
571 |
channelMode = EJointStereo;
|
|
sl@0
|
572 |
}
|
|
sl@0
|
573 |
else if (channelModesSupportedByHeadset & EStereo)
|
|
sl@0
|
574 |
{
|
|
sl@0
|
575 |
iChannels = EMMFStereo;
|
|
sl@0
|
576 |
iStereoSupport = EMMFInterleavedOnly;
|
|
sl@0
|
577 |
channelMode = EStereo;
|
|
sl@0
|
578 |
}
|
|
sl@0
|
579 |
}
|
|
sl@0
|
580 |
sbcCodecConfiguration->SetChannelModes(channelMode);
|
|
sl@0
|
581 |
|
|
sl@0
|
582 |
//--block mode--
|
|
sl@0
|
583 |
//we'll choose a preference order of 16,12, 8,4
|
|
sl@0
|
584 |
//although there may be a more intelligent way of doing this
|
|
sl@0
|
585 |
//based on the other parameters.
|
|
sl@0
|
586 |
TSBCBlockLengthBitmask blockLength = EBlockLenSixteen;
|
|
sl@0
|
587 |
TSBCBlockLengthBitmask blockLengthsSupportedByHeadset = aCodecCaps.BlockLengths();
|
|
sl@0
|
588 |
if (iForcedRemoteSBCCodecConfiguration)
|
|
sl@0
|
589 |
{
|
|
sl@0
|
590 |
blockLengthsSupportedByHeadset = iForcedRemoteSBCCodecConfiguration->BlockLengths();
|
|
sl@0
|
591 |
}
|
|
sl@0
|
592 |
if (blockLengthsSupportedByHeadset & EBlockLenSixteen)
|
|
sl@0
|
593 |
{
|
|
sl@0
|
594 |
blockLength = EBlockLenSixteen;
|
|
sl@0
|
595 |
}
|
|
sl@0
|
596 |
else if (blockLengthsSupportedByHeadset & EBlockLenTwelve)
|
|
sl@0
|
597 |
{
|
|
sl@0
|
598 |
blockLength = EBlockLenTwelve;
|
|
sl@0
|
599 |
}
|
|
sl@0
|
600 |
else if (blockLengthsSupportedByHeadset & EBlockLenEight)
|
|
sl@0
|
601 |
{
|
|
sl@0
|
602 |
blockLength = EBlockLenEight;
|
|
sl@0
|
603 |
}
|
|
sl@0
|
604 |
else if (blockLengthsSupportedByHeadset & EBlockLenFour)
|
|
sl@0
|
605 |
{
|
|
sl@0
|
606 |
blockLength = EBlockLenFour;
|
|
sl@0
|
607 |
}
|
|
sl@0
|
608 |
sbcCodecConfiguration->SetBlockLengths(blockLength);
|
|
sl@0
|
609 |
|
|
sl@0
|
610 |
//--subbands--
|
|
sl@0
|
611 |
//Subbands currently have a preference of 8 over 4
|
|
sl@0
|
612 |
TUint numberOfSubbands = 8; //used later for max bit pool value calculation
|
|
sl@0
|
613 |
TSBCSubbandsBitmask subbands = EEightSubbands;
|
|
sl@0
|
614 |
TSBCSubbandsBitmask subbandsSupportedByHeadset = aCodecCaps.Subbands();
|
|
sl@0
|
615 |
if (iForcedRemoteSBCCodecConfiguration)
|
|
sl@0
|
616 |
{
|
|
sl@0
|
617 |
subbandsSupportedByHeadset = iForcedRemoteSBCCodecConfiguration->Subbands();
|
|
sl@0
|
618 |
}
|
|
sl@0
|
619 |
if (subbandsSupportedByHeadset & EEightSubbands)
|
|
sl@0
|
620 |
{
|
|
sl@0
|
621 |
subbands = EEightSubbands;
|
|
sl@0
|
622 |
}
|
|
sl@0
|
623 |
else if (subbandsSupportedByHeadset & EFourSubbands)
|
|
sl@0
|
624 |
{
|
|
sl@0
|
625 |
subbands = EFourSubbands;
|
|
sl@0
|
626 |
numberOfSubbands = 4;
|
|
sl@0
|
627 |
}
|
|
sl@0
|
628 |
sbcCodecConfiguration->SetSubbands(subbands);
|
|
sl@0
|
629 |
|
|
sl@0
|
630 |
//--Allocation--
|
|
sl@0
|
631 |
//although allocation support of SNR and loudness are mandatory the headset
|
|
sl@0
|
632 |
//may have reconfigured to use a particular allocation method
|
|
sl@0
|
633 |
//If both allocation methods are available we have to choose which one
|
|
sl@0
|
634 |
//so we'll choose a preference order of loudness over SNR
|
|
sl@0
|
635 |
TSBCAllocationMethodBitmask allocationMethod = ELoudness;
|
|
sl@0
|
636 |
TSBCAllocationMethodBitmask allocationMethodsSupportedByHeadset = aCodecCaps.AllocationMethods();
|
|
sl@0
|
637 |
if (iForcedRemoteSBCCodecConfiguration)
|
|
sl@0
|
638 |
{
|
|
sl@0
|
639 |
allocationMethodsSupportedByHeadset = iForcedRemoteSBCCodecConfiguration->AllocationMethods();
|
|
sl@0
|
640 |
}
|
|
sl@0
|
641 |
if (allocationMethodsSupportedByHeadset & ELoudness)
|
|
sl@0
|
642 |
{
|
|
sl@0
|
643 |
allocationMethod = ELoudness;
|
|
sl@0
|
644 |
}
|
|
sl@0
|
645 |
else if (allocationMethodsSupportedByHeadset & ESNR)
|
|
sl@0
|
646 |
{
|
|
sl@0
|
647 |
allocationMethod = ESNR;
|
|
sl@0
|
648 |
}
|
|
sl@0
|
649 |
sbcCodecConfiguration->SetAllocationMethods(allocationMethod);
|
|
sl@0
|
650 |
|
|
sl@0
|
651 |
//--bitpool
|
|
sl@0
|
652 |
// The bitpool value must be in the range of 2-250 and must not exceed
|
|
sl@0
|
653 |
// 16*numberOfSubbands*channels
|
|
sl@0
|
654 |
// note that we don't normally play SBC directly, except for test purposes
|
|
sl@0
|
655 |
// in order to arbitary play any SBC file extra code would be required
|
|
sl@0
|
656 |
// to parse the SBC frame header to get the bitpool value
|
|
sl@0
|
657 |
// since for unit testing the the SBC test file is known to have a
|
|
sl@0
|
658 |
// bit pool value of 20, this shall be the default value
|
|
sl@0
|
659 |
// This code could be made more more intelligent and base the
|
|
sl@0
|
660 |
// bitpool value around table 4.7 in the A2DP specification
|
|
sl@0
|
661 |
TUint minBitPoolValue = KMinBitPoolValue;
|
|
sl@0
|
662 |
TUint maxBitPoolValue = KMaxBitPoolValue;
|
|
sl@0
|
663 |
if (KMinBitPoolValue < aCodecCaps.MinBitpoolValue())
|
|
sl@0
|
664 |
{
|
|
sl@0
|
665 |
minBitPoolValue = aCodecCaps.MinBitpoolValue();
|
|
sl@0
|
666 |
}
|
|
sl@0
|
667 |
if (KMaxBitPoolValue > aCodecCaps.MaxBitpoolValue())
|
|
sl@0
|
668 |
{
|
|
sl@0
|
669 |
TUint maxAllowableBitPoolValueForCurrentConfiguration = 16*iChannels*numberOfSubbands;
|
|
sl@0
|
670 |
maxBitPoolValue = aCodecCaps.MaxBitpoolValue();
|
|
sl@0
|
671 |
if (maxBitPoolValue > maxAllowableBitPoolValueForCurrentConfiguration)
|
|
sl@0
|
672 |
{
|
|
sl@0
|
673 |
maxBitPoolValue = maxAllowableBitPoolValueForCurrentConfiguration;
|
|
sl@0
|
674 |
}
|
|
sl@0
|
675 |
}
|
|
sl@0
|
676 |
sbcCodecConfiguration->SetMinBitpoolValue(minBitPoolValue);
|
|
sl@0
|
677 |
sbcCodecConfiguration->SetMaxBitpoolValue(maxBitPoolValue);
|
|
sl@0
|
678 |
}//if (sbcCodecConfiguration)
|
|
sl@0
|
679 |
|
|
sl@0
|
680 |
return sbcCodecConfiguration;
|
|
sl@0
|
681 |
}
|
|
sl@0
|
682 |
|
|
sl@0
|
683 |
|
|
sl@0
|
684 |
/**
|
|
sl@0
|
685 |
internal function to get a remote codec configuration from the capabilities
|
|
sl@0
|
686 |
Note technically speaking MPEG12 refers to MPEG 1 & MPEG 2 audio layers 1,2 and 3
|
|
sl@0
|
687 |
however since mp1 & mp2 is rarely used in practice this
|
|
sl@0
|
688 |
will be MPEG 1 layer 3 ie mp3 in most case
|
|
sl@0
|
689 |
*/
|
|
sl@0
|
690 |
TNonSBCCodecCapabilities* CA2dpAudioCodecConfiguration::GetRemoteMPEG12CodecConfiguration(const TNonSBCCodecCapabilities& aCodecCaps)
|
|
sl@0
|
691 |
{
|
|
sl@0
|
692 |
TNonSBCCodecCapabilities* mpeg12CodecConfiguration = new TNonSBCCodecCapabilities(EAvdtpMediaTypeAudio, EAudioCodecMPEG12Audio);
|
|
sl@0
|
693 |
TBuf8<4> mpeg12CodecConfigurationData;//should be 4 make 6 for bug??
|
|
sl@0
|
694 |
if (mpeg12CodecConfiguration)
|
|
sl@0
|
695 |
{//codecData should contain data conformant to A2DP profile
|
|
sl@0
|
696 |
// codec specific information elements section A2DP 4.4.2
|
|
sl@0
|
697 |
TPtrC8 codecCapsData(aCodecCaps.CodecData());
|
|
sl@0
|
698 |
TInt8 mpegLayerSupport = codecCapsData[0] & KA2dpMPEG12LayerMask;
|
|
sl@0
|
699 |
if (!(mpegLayerSupport & KA2dpMPEG12LayerMP3Supported))
|
|
sl@0
|
700 |
{
|
|
sl@0
|
701 |
//then mp3 is not supported must be mp1 or mp2 which we don't support
|
|
sl@0
|
702 |
delete mpeg12CodecConfiguration;
|
|
sl@0
|
703 |
mpeg12CodecConfiguration = NULL;
|
|
sl@0
|
704 |
return mpeg12CodecConfiguration;
|
|
sl@0
|
705 |
}
|
|
sl@0
|
706 |
mpegLayerSupport = KA2dpMPEG12LayerMP3Supported; //mp3
|
|
sl@0
|
707 |
//we don't bother with CRC protection so don't check
|
|
sl@0
|
708 |
|
|
sl@0
|
709 |
//the MPEG12 channel support structure is identical to
|
|
sl@0
|
710 |
//SBC so we'll use the SBC structure
|
|
sl@0
|
711 |
//--channels--
|
|
sl@0
|
712 |
TSBCChannelModeBitmask channelMode = EMono;
|
|
sl@0
|
713 |
TSBCChannelModeBitmask channelModesSupportedByHeadset = EMono;
|
|
sl@0
|
714 |
channelModesSupportedByHeadset = codecCapsData[0] & KA2dpMPEG12AudioChannelModeMask;
|
|
sl@0
|
715 |
if (iChannels == EMMFMono)
|
|
sl@0
|
716 |
{
|
|
sl@0
|
717 |
channelMode = EMono;
|
|
sl@0
|
718 |
}
|
|
sl@0
|
719 |
else if ((iChannels == EMMFStereo) && (iStereoSupport == EMMFInterleavedOnly))
|
|
sl@0
|
720 |
{
|
|
sl@0
|
721 |
channelMode = EStereo;
|
|
sl@0
|
722 |
}
|
|
sl@0
|
723 |
else if ((iChannels == EMMFStereo) && (iStereoSupport == EMMFJoint))
|
|
sl@0
|
724 |
{
|
|
sl@0
|
725 |
channelMode = EJointStereo;
|
|
sl@0
|
726 |
}
|
|
sl@0
|
727 |
if (!(channelMode & channelModesSupportedByHeadset))
|
|
sl@0
|
728 |
{
|
|
sl@0
|
729 |
//then we don't support the selected channel mode
|
|
sl@0
|
730 |
if (channelModesSupportedByHeadset & EMono)
|
|
sl@0
|
731 |
{
|
|
sl@0
|
732 |
iChannels = EMMFMono;
|
|
sl@0
|
733 |
iStereoSupport = EMMFNone;
|
|
sl@0
|
734 |
channelMode = EMono;
|
|
sl@0
|
735 |
}
|
|
sl@0
|
736 |
else if (channelModesSupportedByHeadset & EJointStereo)
|
|
sl@0
|
737 |
{
|
|
sl@0
|
738 |
iChannels = EMMFStereo;
|
|
sl@0
|
739 |
iStereoSupport = EMMFJoint;
|
|
sl@0
|
740 |
channelMode = EJointStereo;
|
|
sl@0
|
741 |
}
|
|
sl@0
|
742 |
else if (channelModesSupportedByHeadset & EStereo)
|
|
sl@0
|
743 |
{
|
|
sl@0
|
744 |
iChannels = EMMFStereo;
|
|
sl@0
|
745 |
iStereoSupport = EMMFInterleavedOnly;
|
|
sl@0
|
746 |
channelMode = EStereo;
|
|
sl@0
|
747 |
}
|
|
sl@0
|
748 |
}
|
|
sl@0
|
749 |
mpeg12CodecConfigurationData.Append(mpegLayerSupport | channelMode);
|
|
sl@0
|
750 |
|
|
sl@0
|
751 |
//Media Payload Format
|
|
sl@0
|
752 |
//this ref implementation shall only support the media payload format
|
|
sl@0
|
753 |
//defined in RFC2250, RFC3119 is not supported
|
|
sl@0
|
754 |
//therefore there is no need to check this since MPF-1/RFC2250 is mandatory
|
|
sl@0
|
755 |
|
|
sl@0
|
756 |
//--sampling frequency--
|
|
sl@0
|
757 |
//the mp3 sampling frequency mask is not the same as SBC so can't use TSBCSamplingFrequencyBitmask
|
|
sl@0
|
758 |
TMPEG12SamplingFrequencyBitmask freqs;
|
|
sl@0
|
759 |
switch(iSampleRate)
|
|
sl@0
|
760 |
{
|
|
sl@0
|
761 |
case 16000:
|
|
sl@0
|
762 |
freqs = EMPEG12_16kHz;
|
|
sl@0
|
763 |
break;
|
|
sl@0
|
764 |
case 22050:
|
|
sl@0
|
765 |
freqs = EMPEG12_22050Hz;
|
|
sl@0
|
766 |
break;
|
|
sl@0
|
767 |
case 24000:
|
|
sl@0
|
768 |
freqs = EMPEG12_24kHz;
|
|
sl@0
|
769 |
break;
|
|
sl@0
|
770 |
case 32000:
|
|
sl@0
|
771 |
freqs = EMPEG12_32kHz;
|
|
sl@0
|
772 |
break;
|
|
sl@0
|
773 |
case 44100:
|
|
sl@0
|
774 |
freqs = EMPEG12_44100Hz;
|
|
sl@0
|
775 |
break;
|
|
sl@0
|
776 |
case 48000:
|
|
sl@0
|
777 |
freqs = EMPEG12_48kHz;
|
|
sl@0
|
778 |
break;
|
|
sl@0
|
779 |
default:
|
|
sl@0
|
780 |
freqs = EMPEG12_16kHz;
|
|
sl@0
|
781 |
break;
|
|
sl@0
|
782 |
}
|
|
sl@0
|
783 |
//check we really can support this sampling frequency
|
|
sl@0
|
784 |
//since we may be using the default which may not be supported
|
|
sl@0
|
785 |
//by the headset (even if the A2DP spec says it is mandatory)
|
|
sl@0
|
786 |
TMPEG12SamplingFrequencyBitmask samplingFreqsSupportedByHeadset = codecCapsData[1] & KA2dpMPEG12SamplingFrequencyMask;
|
|
sl@0
|
787 |
if (!(freqs & samplingFreqsSupportedByHeadset))
|
|
sl@0
|
788 |
{//then the headset doesn't support the sampling frequency
|
|
sl@0
|
789 |
//this could happen if iSampleRate is a default that the headset doesn't support
|
|
sl@0
|
790 |
//note that evenif the default is a mandatory sample rate eg 44100
|
|
sl@0
|
791 |
//we still do not make any assumptions about what is supported
|
|
sl@0
|
792 |
if (samplingFreqsSupportedByHeadset & EMPEG12_16kHz)
|
|
sl@0
|
793 |
{
|
|
sl@0
|
794 |
iSampleRate = 16000;
|
|
sl@0
|
795 |
freqs = EMPEG12_16kHz;
|
|
sl@0
|
796 |
}
|
|
sl@0
|
797 |
else if (samplingFreqsSupportedByHeadset & EMPEG12_22050Hz)
|
|
sl@0
|
798 |
{
|
|
sl@0
|
799 |
iSampleRate = 22050;
|
|
sl@0
|
800 |
freqs = EMPEG12_22050Hz;
|
|
sl@0
|
801 |
}
|
|
sl@0
|
802 |
else if (samplingFreqsSupportedByHeadset & EMPEG12_24kHz)
|
|
sl@0
|
803 |
{
|
|
sl@0
|
804 |
iSampleRate = 24000;
|
|
sl@0
|
805 |
freqs = EMPEG12_24kHz;
|
|
sl@0
|
806 |
}
|
|
sl@0
|
807 |
else if (samplingFreqsSupportedByHeadset & EMPEG12_32kHz)
|
|
sl@0
|
808 |
{
|
|
sl@0
|
809 |
iSampleRate = 32000;
|
|
sl@0
|
810 |
freqs = EMPEG12_32kHz;
|
|
sl@0
|
811 |
}
|
|
sl@0
|
812 |
else if (samplingFreqsSupportedByHeadset & EMPEG12_44100Hz)
|
|
sl@0
|
813 |
{
|
|
sl@0
|
814 |
iSampleRate = 44100;
|
|
sl@0
|
815 |
freqs = EMPEG12_44100Hz;
|
|
sl@0
|
816 |
}
|
|
sl@0
|
817 |
else if (samplingFreqsSupportedByHeadset & EMPEG12_48kHz)
|
|
sl@0
|
818 |
{
|
|
sl@0
|
819 |
iSampleRate = 48000;
|
|
sl@0
|
820 |
freqs = EMPEG12_48kHz;
|
|
sl@0
|
821 |
}
|
|
sl@0
|
822 |
//else just keep as is
|
|
sl@0
|
823 |
}
|
|
sl@0
|
824 |
//set frequency, MPF-1
|
|
sl@0
|
825 |
mpeg12CodecConfigurationData.Append(freqs);
|
|
sl@0
|
826 |
|
|
sl@0
|
827 |
|
|
sl@0
|
828 |
//The casira pod only supports bit rates up to 96kbs-1
|
|
sl@0
|
829 |
//so check the headset supports these as well
|
|
sl@0
|
830 |
//we'll just mask with all the lower bit rates
|
|
sl@0
|
831 |
//all the lower bit rate support up to 96kbs-1are in octet 3
|
|
sl@0
|
832 |
//so just make out octet 2 bit rate support
|
|
sl@0
|
833 |
//also VBR = 0 as no VBR support
|
|
sl@0
|
834 |
mpeg12CodecConfigurationData.Append(0);
|
|
sl@0
|
835 |
|
|
sl@0
|
836 |
//all bitrates <= 96kbs-1 except free format
|
|
sl@0
|
837 |
mpeg12CodecConfigurationData.Append(KA2dpMPEG12SupportedBitRateIndex & codecCapsData[3]);
|
|
sl@0
|
838 |
mpeg12CodecConfiguration->SetCodecData(mpeg12CodecConfigurationData);
|
|
sl@0
|
839 |
}
|
|
sl@0
|
840 |
return mpeg12CodecConfiguration;
|
|
sl@0
|
841 |
}
|
|
sl@0
|
842 |
|
|
sl@0
|
843 |
|
|
sl@0
|
844 |
/**
|
|
sl@0
|
845 |
Utility function get the codec capabilities used by Gavdp into the SBC codec paramerers
|
|
sl@0
|
846 |
used by the SBC codec
|
|
sl@0
|
847 |
The function uses the TSBCCodecCapabilities to generate a set of TSBCFrameParameters
|
|
sl@0
|
848 |
which can be used to configure the codec
|
|
sl@0
|
849 |
the remote codec configuration must have already been updated before calling
|
|
sl@0
|
850 |
this function
|
|
sl@0
|
851 |
|
|
sl@0
|
852 |
@param aSBCFrameParameters These are set to the current configuration settings
|
|
sl@0
|
853 |
*/
|
|
sl@0
|
854 |
TSBCFrameParameters& CA2dpAudioCodecConfiguration::UpdateLocalSBCCodecConfiguration()
|
|
sl@0
|
855 |
{
|
|
sl@0
|
856 |
__ASSERT_DEBUG(iRemoteCodecConfiguration, Panic(EA2dpCodecUtilNoRemoteCodecConfig));
|
|
sl@0
|
857 |
__ASSERT_DEBUG((iHeadsetCodecDataType == KMMFFourCCCodeSBC) && (iRemoteCodecConfiguration->MediaCodecType() == EAudioCodecSBC), Panic(EA2dpCodecUtilUnexpectedDataType));
|
|
sl@0
|
858 |
TSBCCodecCapabilities* remoteSBCCodecConfiguration = static_cast<TSBCCodecCapabilities*>(iRemoteCodecConfiguration);
|
|
sl@0
|
859 |
|
|
sl@0
|
860 |
//note that for sampling frequency and channels the capabilites
|
|
sl@0
|
861 |
//have already been checked in SetSampleRate and SetChannels
|
|
sl@0
|
862 |
//and once set we don't allow these to be reconfigured
|
|
sl@0
|
863 |
//so no need to check these again with the codecCaps
|
|
sl@0
|
864 |
//if set the iSampleRate should always be in agreement with
|
|
sl@0
|
865 |
//the settings on the remote codec
|
|
sl@0
|
866 |
TSBCFrameParameters::TSamplingFrequency SBCSamplingFrequency;
|
|
sl@0
|
867 |
switch(iSampleRate)
|
|
sl@0
|
868 |
{
|
|
sl@0
|
869 |
case 32000:
|
|
sl@0
|
870 |
SBCSamplingFrequency = TSBCFrameParameters::E32000Hz;
|
|
sl@0
|
871 |
break;
|
|
sl@0
|
872 |
case 44100:
|
|
sl@0
|
873 |
SBCSamplingFrequency = TSBCFrameParameters::E44100Hz;
|
|
sl@0
|
874 |
break;
|
|
sl@0
|
875 |
case 48000:
|
|
sl@0
|
876 |
SBCSamplingFrequency = TSBCFrameParameters::E48000Hz;
|
|
sl@0
|
877 |
break;
|
|
sl@0
|
878 |
default://[TODO] change default to 44100 when hardware
|
|
sl@0
|
879 |
//(ie BT support H2 or higher bandwidth support on Casira) supports it
|
|
sl@0
|
880 |
SBCSamplingFrequency = TSBCFrameParameters::E16000Hz;
|
|
sl@0
|
881 |
break;
|
|
sl@0
|
882 |
}
|
|
sl@0
|
883 |
|
|
sl@0
|
884 |
iLocalSBCCodecConfiguration.SetSamplingFrequency(SBCSamplingFrequency);
|
|
sl@0
|
885 |
|
|
sl@0
|
886 |
//although a block length of 4,8,12,16 are mandatory the headset
|
|
sl@0
|
887 |
//may have reconfigured to use a particular block length
|
|
sl@0
|
888 |
//If all block lengths are available we have to choose which one
|
|
sl@0
|
889 |
//For now we'll choose a preference order of 12,16,8,4
|
|
sl@0
|
890 |
//although there may be a more intelligent way of doing this
|
|
sl@0
|
891 |
//based on the other parameters.
|
|
sl@0
|
892 |
switch(remoteSBCCodecConfiguration->BlockLengths())
|
|
sl@0
|
893 |
{
|
|
sl@0
|
894 |
case EBlockLenTwelve:
|
|
sl@0
|
895 |
iLocalSBCCodecConfiguration.SetBlockLength(TSBCFrameParameters::E12Blocks);
|
|
sl@0
|
896 |
break;
|
|
sl@0
|
897 |
case EBlockLenSixteen:
|
|
sl@0
|
898 |
iLocalSBCCodecConfiguration.SetBlockLength(TSBCFrameParameters::E16Blocks);
|
|
sl@0
|
899 |
break;
|
|
sl@0
|
900 |
case EBlockLenEight:
|
|
sl@0
|
901 |
iLocalSBCCodecConfiguration.SetBlockLength(TSBCFrameParameters::E8Blocks);
|
|
sl@0
|
902 |
break;
|
|
sl@0
|
903 |
case EBlockLenFour:
|
|
sl@0
|
904 |
iLocalSBCCodecConfiguration.SetBlockLength(TSBCFrameParameters::E4Blocks);
|
|
sl@0
|
905 |
break;
|
|
sl@0
|
906 |
default:
|
|
sl@0
|
907 |
Panic(EA2dpCodecUtilUnexpectedConfiguration);
|
|
sl@0
|
908 |
break;
|
|
sl@0
|
909 |
}
|
|
sl@0
|
910 |
|
|
sl@0
|
911 |
|
|
sl@0
|
912 |
//channel mode
|
|
sl@0
|
913 |
//although the number of channels can't be changed on the fly
|
|
sl@0
|
914 |
//switching between stereo and joint stereo is supported
|
|
sl@0
|
915 |
//note different namespaces for EStereo & EJointStereo !
|
|
sl@0
|
916 |
TSBCFrameParameters::TChannelMode channelMode = TSBCFrameParameters::EMono;//default
|
|
sl@0
|
917 |
if (iChannels == EMMFStereo)
|
|
sl@0
|
918 |
{
|
|
sl@0
|
919 |
if (iStereoSupport & EMMFJoint)
|
|
sl@0
|
920 |
{
|
|
sl@0
|
921 |
channelMode = TSBCFrameParameters::EJointStereo;
|
|
sl@0
|
922 |
}
|
|
sl@0
|
923 |
else if (iStereoSupport & EMMFInterleavedOnly)
|
|
sl@0
|
924 |
{
|
|
sl@0
|
925 |
channelMode = TSBCFrameParameters::EStereo;
|
|
sl@0
|
926 |
}
|
|
sl@0
|
927 |
else
|
|
sl@0
|
928 |
{
|
|
sl@0
|
929 |
Panic(EA2dpCodecUtilUnexpectedConfiguration);
|
|
sl@0
|
930 |
}
|
|
sl@0
|
931 |
}
|
|
sl@0
|
932 |
|
|
sl@0
|
933 |
iLocalSBCCodecConfiguration.SetChannelMode(channelMode);
|
|
sl@0
|
934 |
|
|
sl@0
|
935 |
//Allocation
|
|
sl@0
|
936 |
//although allocation support of SNR and loudness are mandatory the headset
|
|
sl@0
|
937 |
//may have reconfigured to use a particular allocation method
|
|
sl@0
|
938 |
//If both allocation methods are available we have to choose which one
|
|
sl@0
|
939 |
//For now we'll choose a preference order of loudness followed by SNR
|
|
sl@0
|
940 |
|
|
sl@0
|
941 |
switch(remoteSBCCodecConfiguration->AllocationMethods())
|
|
sl@0
|
942 |
{
|
|
sl@0
|
943 |
case ELoudness:
|
|
sl@0
|
944 |
iLocalSBCCodecConfiguration.SetAllocationMethod(TSBCFrameParameters::ELoudness);
|
|
sl@0
|
945 |
break;
|
|
sl@0
|
946 |
case ESNR:
|
|
sl@0
|
947 |
iLocalSBCCodecConfiguration.SetAllocationMethod(TSBCFrameParameters::ESNR);
|
|
sl@0
|
948 |
break;
|
|
sl@0
|
949 |
default:
|
|
sl@0
|
950 |
Panic(EA2dpCodecUtilUnexpectedConfiguration);
|
|
sl@0
|
951 |
break;
|
|
sl@0
|
952 |
}
|
|
sl@0
|
953 |
|
|
sl@0
|
954 |
|
|
sl@0
|
955 |
//Subbands currently have a preference of four over 8, but change to 8 later
|
|
sl@0
|
956 |
//when hardware is available to support higher bandwidth
|
|
sl@0
|
957 |
switch(remoteSBCCodecConfiguration->Subbands())
|
|
sl@0
|
958 |
{
|
|
sl@0
|
959 |
case EFourSubbands:
|
|
sl@0
|
960 |
iLocalSBCCodecConfiguration.SetSubbands(TSBCFrameParameters::E4Subbands);
|
|
sl@0
|
961 |
break;
|
|
sl@0
|
962 |
case EEightSubbands:
|
|
sl@0
|
963 |
iLocalSBCCodecConfiguration.SetSubbands(TSBCFrameParameters::E8Subbands);
|
|
sl@0
|
964 |
break;
|
|
sl@0
|
965 |
default:
|
|
sl@0
|
966 |
Panic(EA2dpCodecUtilUnexpectedConfiguration);
|
|
sl@0
|
967 |
break;
|
|
sl@0
|
968 |
}
|
|
sl@0
|
969 |
|
|
sl@0
|
970 |
// note that we don't normally play SBC directly, except for test purposes
|
|
sl@0
|
971 |
// in order to arbitary play any SBC file extra code would be required
|
|
sl@0
|
972 |
// to parse the SBC frame header to get the bitpool value
|
|
sl@0
|
973 |
// since for unit testing the the SBC test file is known to have a
|
|
sl@0
|
974 |
// bit pool value of 20, this shall be the default value
|
|
sl@0
|
975 |
// This code could be made more more intelligent and base the
|
|
sl@0
|
976 |
// bitpool value around table 4.7 in the A2DP specification
|
|
sl@0
|
977 |
TUint bitPoolValue = KDefaultBitPoolValue; //default is 20
|
|
sl@0
|
978 |
if (KDefaultBitPoolValue < remoteSBCCodecConfiguration->MinBitpoolValue())
|
|
sl@0
|
979 |
{
|
|
sl@0
|
980 |
bitPoolValue = remoteSBCCodecConfiguration->MinBitpoolValue();
|
|
sl@0
|
981 |
}
|
|
sl@0
|
982 |
else if (KDefaultBitPoolValue > remoteSBCCodecConfiguration->MaxBitpoolValue())
|
|
sl@0
|
983 |
{
|
|
sl@0
|
984 |
bitPoolValue = remoteSBCCodecConfiguration->MaxBitpoolValue();
|
|
sl@0
|
985 |
}
|
|
sl@0
|
986 |
iLocalSBCCodecConfiguration.SetBitpool(bitPoolValue);
|
|
sl@0
|
987 |
|
|
sl@0
|
988 |
return iLocalSBCCodecConfiguration;
|
|
sl@0
|
989 |
}
|
|
sl@0
|
990 |
|
|
sl@0
|
991 |
|
|
sl@0
|
992 |
/**
|
|
sl@0
|
993 |
Internal function to calculate the SBC buffer length required from the SBC frame parameters
|
|
sl@0
|
994 |
using the given pcm16 buffer length
|
|
sl@0
|
995 |
*/
|
|
sl@0
|
996 |
TUint CA2dpAudioCodecConfiguration::CalculateSBCBufferLength(TUint aPCM16BufferLength) const
|
|
sl@0
|
997 |
{
|
|
sl@0
|
998 |
//ASSERT data type = SBC
|
|
sl@0
|
999 |
|
|
sl@0
|
1000 |
//first calculate the number of PCM16 samples in one SBC frame
|
|
sl@0
|
1001 |
TUint numberOfSamplesPerSBCFrame = iLocalSBCCodecConfiguration.BlockLength()*iLocalSBCCodecConfiguration.Subbands();
|
|
sl@0
|
1002 |
|
|
sl@0
|
1003 |
//calculate the number of bytes in one sample
|
|
sl@0
|
1004 |
TUint numberOfPCM16BytesPerSample = 2*iLocalSBCCodecConfiguration.Channels();
|
|
sl@0
|
1005 |
|
|
sl@0
|
1006 |
TUint numberOfPCM16BytesPerSBCFrame = numberOfSamplesPerSBCFrame*numberOfPCM16BytesPerSample;
|
|
sl@0
|
1007 |
|
|
sl@0
|
1008 |
TUint numberOfFrames = aPCM16BufferLength/numberOfPCM16BytesPerSBCFrame;
|
|
sl@0
|
1009 |
|
|
sl@0
|
1010 |
TUint lengthOfSBCFrame = iLocalSBCCodecConfiguration.CalcFrameLength();
|
|
sl@0
|
1011 |
|
|
sl@0
|
1012 |
return numberOfFrames*lengthOfSBCFrame;
|
|
sl@0
|
1013 |
}
|
|
sl@0
|
1014 |
|
|
sl@0
|
1015 |
|
|
sl@0
|
1016 |
/**
|
|
sl@0
|
1017 |
Test function to force the remote SBC codec configuration to that set in aRemoteCodecConfiguration
|
|
sl@0
|
1018 |
This function is just used for test purposes to set the SBC settings for
|
|
sl@0
|
1019 |
playing SBC data direct to the a2dpBTHeadsetAudioIf ie when the Data type is
|
|
sl@0
|
1020 |
set to SBC
|
|
sl@0
|
1021 |
It is up to the user to ensure that the headset supports the configuration
|
|
sl@0
|
1022 |
since this will bypass the normal capability check
|
|
sl@0
|
1023 |
*/
|
|
sl@0
|
1024 |
void CA2dpAudioCodecConfiguration::TEST_ForceRemoteSBCCodecConfiguration(const TSBCCodecCapabilities& aRemoteCodecConfiguration)
|
|
sl@0
|
1025 |
{
|
|
sl@0
|
1026 |
iForcedRemoteSBCCodecConfiguration = const_cast<TSBCCodecCapabilities*>(&aRemoteCodecConfiguration);
|
|
sl@0
|
1027 |
}
|
|
sl@0
|
1028 |
|
|
sl@0
|
1029 |
|
|
sl@0
|
1030 |
|
|
sl@0
|
1031 |
|
|
sl@0
|
1032 |
CA2dpCodecFrameHeaderParser* CA2dpCodecFrameHeaderParser::NewL(const TFourCC& aCodecDataType, const TDesC8& aHeader)
|
|
sl@0
|
1033 |
{
|
|
sl@0
|
1034 |
CA2dpCodecFrameHeaderParser* self = new (ELeave) CA2dpCodecFrameHeaderParser();
|
|
sl@0
|
1035 |
CleanupStack::PushL(self);
|
|
sl@0
|
1036 |
self->ConstructL(aCodecDataType, aHeader);
|
|
sl@0
|
1037 |
CleanupStack::Pop(self);
|
|
sl@0
|
1038 |
return self;
|
|
sl@0
|
1039 |
}
|
|
sl@0
|
1040 |
|
|
sl@0
|
1041 |
|
|
sl@0
|
1042 |
CA2dpCodecFrameHeaderParser::CA2dpCodecFrameHeaderParser()
|
|
sl@0
|
1043 |
{
|
|
sl@0
|
1044 |
|
|
sl@0
|
1045 |
}
|
|
sl@0
|
1046 |
|
|
sl@0
|
1047 |
|
|
sl@0
|
1048 |
CA2dpCodecFrameHeaderParser::~CA2dpCodecFrameHeaderParser()
|
|
sl@0
|
1049 |
{
|
|
sl@0
|
1050 |
|
|
sl@0
|
1051 |
}
|
|
sl@0
|
1052 |
|
|
sl@0
|
1053 |
|
|
sl@0
|
1054 |
/**
|
|
sl@0
|
1055 |
Only used for playing SBC test files
|
|
sl@0
|
1056 |
*/
|
|
sl@0
|
1057 |
void CA2dpCodecFrameHeaderParser::ParseSBCHeaderL(const TDesC8& aHeader)
|
|
sl@0
|
1058 |
{
|
|
sl@0
|
1059 |
if (aHeader[0] != KSbcFrameHeaderSyncWord)
|
|
sl@0
|
1060 |
{
|
|
sl@0
|
1061 |
User::Leave(KErrCorrupt); //not a valid sbc frame
|
|
sl@0
|
1062 |
}
|
|
sl@0
|
1063 |
|
|
sl@0
|
1064 |
TUint samplingFrequency = (aHeader[1] & KSbcFrameHeaderSamplingFrequencyMask)>>6;
|
|
sl@0
|
1065 |
switch(samplingFrequency)
|
|
sl@0
|
1066 |
{
|
|
sl@0
|
1067 |
case TSBCFrameParameters::E16000Hz:
|
|
sl@0
|
1068 |
iSampleRate = 16000;
|
|
sl@0
|
1069 |
break;
|
|
sl@0
|
1070 |
case TSBCFrameParameters::E32000Hz:
|
|
sl@0
|
1071 |
iSampleRate = 32000;
|
|
sl@0
|
1072 |
break;
|
|
sl@0
|
1073 |
case TSBCFrameParameters::E44100Hz:
|
|
sl@0
|
1074 |
iSampleRate = 44100;
|
|
sl@0
|
1075 |
break;
|
|
sl@0
|
1076 |
case TSBCFrameParameters::E48000Hz:
|
|
sl@0
|
1077 |
iSampleRate = 48000;
|
|
sl@0
|
1078 |
break;
|
|
sl@0
|
1079 |
default:
|
|
sl@0
|
1080 |
User::Leave(KErrCorrupt);//not a valid header
|
|
sl@0
|
1081 |
break;
|
|
sl@0
|
1082 |
}
|
|
sl@0
|
1083 |
|
|
sl@0
|
1084 |
TUint8 blocks = (aHeader[1] & KSbcFrameHeaderBlocksMask)>>4;
|
|
sl@0
|
1085 |
switch(blocks)
|
|
sl@0
|
1086 |
{
|
|
sl@0
|
1087 |
case TSBCFrameParameters::E4Blocks:
|
|
sl@0
|
1088 |
blocks = 4;
|
|
sl@0
|
1089 |
break;
|
|
sl@0
|
1090 |
case TSBCFrameParameters::E8Blocks:
|
|
sl@0
|
1091 |
blocks = 8;
|
|
sl@0
|
1092 |
break;
|
|
sl@0
|
1093 |
case TSBCFrameParameters::E12Blocks:
|
|
sl@0
|
1094 |
blocks = 12;
|
|
sl@0
|
1095 |
break;
|
|
sl@0
|
1096 |
case TSBCFrameParameters::E16Blocks:
|
|
sl@0
|
1097 |
blocks = 16;
|
|
sl@0
|
1098 |
break;
|
|
sl@0
|
1099 |
default:
|
|
sl@0
|
1100 |
User::Leave(KErrCorrupt);//not a valid header
|
|
sl@0
|
1101 |
break;
|
|
sl@0
|
1102 |
}
|
|
sl@0
|
1103 |
TUint8 channelMode = (aHeader[1] & KSbcFrameHeaderChannelModeMask)>>2;
|
|
sl@0
|
1104 |
TUint8 channels = 1;
|
|
sl@0
|
1105 |
|
|
sl@0
|
1106 |
if (channelMode != TSBCFrameParameters::EMono)
|
|
sl@0
|
1107 |
{
|
|
sl@0
|
1108 |
channels = 2;
|
|
sl@0
|
1109 |
}
|
|
sl@0
|
1110 |
|
|
sl@0
|
1111 |
TUint8 subbands = 4;
|
|
sl@0
|
1112 |
if (aHeader[1] & KSbcFrameHeaderSubbandsMask)
|
|
sl@0
|
1113 |
{
|
|
sl@0
|
1114 |
subbands = 8;
|
|
sl@0
|
1115 |
}
|
|
sl@0
|
1116 |
|
|
sl@0
|
1117 |
TUint8 bitpool = aHeader[2];
|
|
sl@0
|
1118 |
|
|
sl@0
|
1119 |
TUint temp = 0;
|
|
sl@0
|
1120 |
switch (channelMode)
|
|
sl@0
|
1121 |
{
|
|
sl@0
|
1122 |
case TSBCFrameParameters::EMono:
|
|
sl@0
|
1123 |
temp = blocks * bitpool; // blocks * bitpool
|
|
sl@0
|
1124 |
break;
|
|
sl@0
|
1125 |
case TSBCFrameParameters::EDualChannel:
|
|
sl@0
|
1126 |
temp = (blocks * bitpool) << 1; // blocks * bitpool * 2
|
|
sl@0
|
1127 |
break;
|
|
sl@0
|
1128 |
case TSBCFrameParameters::EStereo:
|
|
sl@0
|
1129 |
temp = blocks * bitpool; // blocks * bitpool
|
|
sl@0
|
1130 |
break;
|
|
sl@0
|
1131 |
case TSBCFrameParameters::EJointStereo:
|
|
sl@0
|
1132 |
temp = subbands + blocks * bitpool; // subbands + blocks * bitpool
|
|
sl@0
|
1133 |
break;
|
|
sl@0
|
1134 |
}
|
|
sl@0
|
1135 |
|
|
sl@0
|
1136 |
iFrameLength = 4 + ( (subbands * channels) >> 1) + (temp >> 3);
|
|
sl@0
|
1137 |
if (temp & 0x7)
|
|
sl@0
|
1138 |
{
|
|
sl@0
|
1139 |
iFrameLength++;
|
|
sl@0
|
1140 |
}
|
|
sl@0
|
1141 |
|
|
sl@0
|
1142 |
iBitRate = (8*iFrameLength*iSampleRate)/(subbands*blocks);
|
|
sl@0
|
1143 |
}
|
|
sl@0
|
1144 |
|
|
sl@0
|
1145 |
|
|
sl@0
|
1146 |
void CA2dpCodecFrameHeaderParser::ParseMPEG12HeaderL(const TDesC8& aHeader)
|
|
sl@0
|
1147 |
{
|
|
sl@0
|
1148 |
if (aHeader[0] != KMPEGAudioFrameHeaderSyncWord )
|
|
sl@0
|
1149 |
{
|
|
sl@0
|
1150 |
User::Leave(KErrCorrupt); //not a valid MPEG audio frame
|
|
sl@0
|
1151 |
}
|
|
sl@0
|
1152 |
|
|
sl@0
|
1153 |
//check it's really mp3 as opposed to mp1 or mp2
|
|
sl@0
|
1154 |
if ((aHeader[1] & KMp3AudioFrameHeaderIdMask) != KMp3AudioFrameHeaderId)
|
|
sl@0
|
1155 |
{
|
|
sl@0
|
1156 |
User::Leave(KErrNotSupported); //either corrupt or mp1/mp2
|
|
sl@0
|
1157 |
}
|
|
sl@0
|
1158 |
|
|
sl@0
|
1159 |
TUint8 sampleRateIndex = (aHeader[2] & KMp3FrameHeaderSamplingFrequencyMask)>>2;
|
|
sl@0
|
1160 |
switch(sampleRateIndex)
|
|
sl@0
|
1161 |
{
|
|
sl@0
|
1162 |
case 0x00:
|
|
sl@0
|
1163 |
iSampleRate = 44100;
|
|
sl@0
|
1164 |
break;
|
|
sl@0
|
1165 |
case 0x01:
|
|
sl@0
|
1166 |
iSampleRate = 48000;
|
|
sl@0
|
1167 |
break;
|
|
sl@0
|
1168 |
case 0x02:
|
|
sl@0
|
1169 |
iSampleRate = 32000;
|
|
sl@0
|
1170 |
break;
|
|
sl@0
|
1171 |
default:
|
|
sl@0
|
1172 |
User::Leave(KErrCorrupt); //invalid mp3 header?
|
|
sl@0
|
1173 |
break;
|
|
sl@0
|
1174 |
}
|
|
sl@0
|
1175 |
TUint8 bitRateIndex = (aHeader[2] & KMp3FrameHeaderBitRateIndexMask)>>4;
|
|
sl@0
|
1176 |
switch(bitRateIndex)
|
|
sl@0
|
1177 |
{
|
|
sl@0
|
1178 |
case EMp3BitRateIndex32000:
|
|
sl@0
|
1179 |
iBitRate = 32000;
|
|
sl@0
|
1180 |
break;
|
|
sl@0
|
1181 |
case EMp3BitRateIndex40000:
|
|
sl@0
|
1182 |
iBitRate = 40000;
|
|
sl@0
|
1183 |
break;
|
|
sl@0
|
1184 |
case EMp3BitRateIndex48000:
|
|
sl@0
|
1185 |
iBitRate = 48000;
|
|
sl@0
|
1186 |
break;
|
|
sl@0
|
1187 |
case EMp3BitRateIndex56000:
|
|
sl@0
|
1188 |
iBitRate = 56000;
|
|
sl@0
|
1189 |
break;
|
|
sl@0
|
1190 |
case EMp3BitRateIndex64000:
|
|
sl@0
|
1191 |
iBitRate = 64000;
|
|
sl@0
|
1192 |
break;
|
|
sl@0
|
1193 |
case EMp3BitRateIndex80000:
|
|
sl@0
|
1194 |
iBitRate = 80000;
|
|
sl@0
|
1195 |
break;
|
|
sl@0
|
1196 |
case EMp3BitRateIndex96000:
|
|
sl@0
|
1197 |
iBitRate = 96000;
|
|
sl@0
|
1198 |
break;
|
|
sl@0
|
1199 |
default:
|
|
sl@0
|
1200 |
User::Leave(KErrNotSupported);//don't support more than 96kbs-1
|
|
sl@0
|
1201 |
break;
|
|
sl@0
|
1202 |
}
|
|
sl@0
|
1203 |
|
|
sl@0
|
1204 |
//this code should really be made more clever to take allowance for any padding
|
|
sl@0
|
1205 |
//and use a frame length such that if padding is used then take the lowest
|
|
sl@0
|
1206 |
//common multiple of frames tht gives a common frame length eg if the frames
|
|
sl@0
|
1207 |
//alternate between 100 and 101 bytes due to an extra padding byte everyother
|
|
sl@0
|
1208 |
//frame then set the frame length to 201;
|
|
sl@0
|
1209 |
TUint bitRateX144 = iBitRate*144;
|
|
sl@0
|
1210 |
iFrameLength = bitRateX144/iSampleRate;
|
|
sl@0
|
1211 |
}
|
|
sl@0
|
1212 |
|
|
sl@0
|
1213 |
|
|
sl@0
|
1214 |
/**
|
|
sl@0
|
1215 |
static
|
|
sl@0
|
1216 |
*/
|
|
sl@0
|
1217 |
void CA2dpCodecFrameHeaderParser::ConstructL(const TFourCC& aCodecDataType, const TDesC8& aHeader)
|
|
sl@0
|
1218 |
{
|
|
sl@0
|
1219 |
switch(const_cast<TFourCC&>(aCodecDataType).FourCC())
|
|
sl@0
|
1220 |
{
|
|
sl@0
|
1221 |
case KMMFFourCCCodeSBC:
|
|
sl@0
|
1222 |
ParseSBCHeaderL(aHeader);
|
|
sl@0
|
1223 |
break;
|
|
sl@0
|
1224 |
case KMMFFourCCCodeMP3:
|
|
sl@0
|
1225 |
ParseMPEG12HeaderL(aHeader);
|
|
sl@0
|
1226 |
break;
|
|
sl@0
|
1227 |
case KMMFFourCCCodeAAC:
|
|
sl@0
|
1228 |
User::Leave(KErrNotSupported);
|
|
sl@0
|
1229 |
break;
|
|
sl@0
|
1230 |
case KMMFFourCCCodeATRAC3:
|
|
sl@0
|
1231 |
User::Leave(KErrNotSupported);
|
|
sl@0
|
1232 |
break;
|
|
sl@0
|
1233 |
default:
|
|
sl@0
|
1234 |
User::Leave(KErrNotSupported);
|
|
sl@0
|
1235 |
break;
|
|
sl@0
|
1236 |
}
|
|
sl@0
|
1237 |
}
|
|
sl@0
|
1238 |
|