gaConfig.h
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:5k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /* parse an MPEG-4 general audio specific config structure from a bitstream */
- #ifndef GACONFIG_H
- #define GACONFIG_H
- #include "hxresult.h"
- #include "hxtypes.h"
- #include "bitstream.h"
- #include "bitstrmint.h"
- class CPCE
- {
- public:
- CPCE() ;
- ~CPCE() ;
- HX_RESULT Read(struct BITSTREAM &bs) ;
- HX_RESULT SetChannelConfiguration(UINT32 channelConfig) ;
- UINT32 GetNChannels() const ;
- private:
- enum {
- MAX_FRONT_ELEMS = 16,
- MAX_SIDE_ELEMS = 16,
- MAX_BACK_ELEMS = 16,
- MAX_LFE_ELEMS = 4,
- MAX_ASSOC_ELEMS = 8,
- MAX_CC_ELEMS = 16
- } ;
- CBitstreamInt element_instance_tag ;
- CBitstreamInt object_type ;
- CBitstreamInt sampling_frequency_index ;
- CBitstreamInt num_front_channel_elements ;
- CBitstreamInt num_side_channel_elements ;
- CBitstreamInt num_back_channel_elements ;
- CBitstreamInt num_lfe_channel_elements ;
- CBitstreamInt num_assoc_data_elements ;
- CBitstreamInt num_valid_cc_elements ;
- CBitstreamInt mono_mixdown_present ;
- CBitstreamInt mono_mixdown_element_number ;
- CBitstreamInt stereo_mixdown_present ;
- CBitstreamInt stereo_mixdown_element_number ;
- CBitstreamInt matrix_mixdown_idx_present ;
- CBitstreamInt matrix_mixdown_idx ;
- CBitstreamInt pseudo_surround_enable ;
- BOOL front_element_is_cpe[MAX_FRONT_ELEMS] ;
- BOOL side_element_is_cpe[MAX_SIDE_ELEMS] ;
- BOOL back_element_is_cpe[MAX_BACK_ELEMS] ;
- BOOL cc_element_is_ind_sw[MAX_CC_ELEMS] ;
- int front_element_tag_select[MAX_FRONT_ELEMS] ;
- int side_element_tag_select[MAX_SIDE_ELEMS] ;
- int back_element_tag_select[MAX_BACK_ELEMS] ;
- int lfe_element_tag_select[MAX_LFE_ELEMS] ;
- int assoc_data_element_tag_select[MAX_ASSOC_ELEMS] ;
- int valid_cc_element_tag_select[MAX_CC_ELEMS] ;
- CBitstreamInt comment_field_bytes ;
- char *comment_field_data ;
- int num_front_channels ;
- int num_side_channels ;
- int num_back_channels ;
- static const int channelMapping[8][4] ;
- } ;
- class CGASpecificConfig
- {
- public:
- CGASpecificConfig() ;
- ~CGASpecificConfig() ;
- HX_RESULT Read(struct BITSTREAM &bs,
- UINT32 samplingFrequency,
- UINT32 ChannelConfiguration,
- UINT32 AudioObjectType) ;
- UINT32 GetNChannels() const {return mPCE.GetNChannels();}
- UINT32 GetFrameLength() const ;
- private:
- CBitstreamInt mFrameLengthFlag ;
- CBitstreamInt mDependsOnCoreCoder ;
- CBitstreamInt mCoreCoderDelay ;
- CBitstreamInt mExtensionFlag ;
- CPCE mPCE ;
- UINT32 mFrameLength ;
- } ;
- class CAudioSpecificConfig
- {
- public:
- CAudioSpecificConfig() ;
- ~CAudioSpecificConfig() ;
- HX_RESULT Read(struct BITSTREAM &bs) ;
- UINT32 GetNChannels() const {return GASpecificConfig.GetNChannels();}
- UINT32 GetSampleRate() const ;
- UINT32 GetCoreSampleRate() const ;
- UINT32 GetCoreSamplingFrequencyIndex() const;
- UINT32 GetObjectType() const ;
- UINT32 GetFrameLength() const {return GASpecificConfig.GetFrameLength();}
- BOOL GetIsSBR() const {return m_bSBR;}
- private:
- CBitstreamInt AudioObjectType ;
- CBitstreamInt samplingFrequencyIndex ;
- CBitstreamInt samplingFrequency ;
- CBitstreamInt extensionSamplingFrequencyIndex ;
- CBitstreamInt extensionSamplingFrequency ;
- CBitstreamInt channelConfiguration ;
- CGASpecificConfig GASpecificConfig ;
- static const UINT32 aSampleRate[13] ;
- BOOL m_bSBR ;
- enum AudioObjectType
- {
- AACMAIN = 1,
- AACLC = 2,
- AACSSR = 3,
- AACLTP = 4,
- AACSBR = 5,
- AACSCALABLE = 6,
- TWINVQ = 7
- } ;
- } ;
- #endif /* #ifndef GACONFIG_H */