diff -r 000000000000 -r 951a5db380a0 videoeditorengine/mp3aacManipLib/MP3Gain/inc/mpheader.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/videoeditorengine/mp3aacManipLib/MP3Gain/inc/mpheader.h Fri Jan 29 14:08:33 2010 +0200 @@ -0,0 +1,124 @@ +/* +* Copyright (c) 2010 Ixonos Plc. +* All rights reserved. +* This component and the accompanying materials are made available +* under the terms of the "Eclipse Public License v1.0" +* which accompanies this distribution, and is available +* at the URL "http://www.eclipse.org/legal/epl-v10.html". +* +* Initial Contributors: +* Nokia Corporation - Initial contribution +* +* Contributors: +* Ixonos Plc +* +* Description: +* +*/ + + +/************************************************************************** + mpheader.h - MPEG-1 and MPEG-2 bit field (header) parsing functions. + + Author(s): Juha Ojanpera + Copyright (c) 1999-2004 by Nokia Research Center, Speech and Audio Systems. + *************************************************************************/ + +#ifndef MPHEADER_H_ +#define MPHEADER_H_ + +/*-- Project Headers. --*/ +#include "mpaud.h" +#include "mp3tables.h" +#include "defines.h" + +/* Checks whether window switching is used in layer III. */ +inline BOOL win_switch(TGranule_Info *gr_info) +{ return ((BOOL)(gr_info->flags & WINDOW_SWITCHING_FLAG)); } + +/* Checks whether short blocks are used in layer III. */ +inline BOOL short_block(TGranule_Info *gr_info) +{ return ((gr_info->flags & 3) == 2); } + +/* Checks whether mixed blocks are present in layer III. */ +inline BOOL mixed_block(TGranule_Info *gr_info) +{ return ((BOOL)(gr_info->flags & MIXED_BLOCK_FLAG)); } + +/* Checks whether 'scalefac_scale' bit is set in layer III. */ +inline BOOL scalefac_scale(TGranule_Info *gr_info) +{ return ((BOOL)((gr_info->flags & SCALEFAC_SCALE) ? 1 : 0)); } + +/* Returns the status of 'pre_flag' bit of layer III. */ +inline BOOL pre_flag(TGranule_Info *gr_info) +{ return ((BOOL)((gr_info->flags & PRE_FLAG) ? 1 : 0)); } + +/*-- Common header parsing functions. --*/ + +/* MPEG-1 or MPEG-2 */ +inline int16 version(TMPEG_Header *mpheader) +{return ((BOOL)((mpheader->header >> 19) & 1));} + +/* Checks whether the current stream is of type MPEG-2.5. */ +inline BOOL mp25version(TMPEG_Header *mpheader) +{ return ((BOOL)((mpheader->header & 0x100000) ? FALSE : TRUE)); } + +/* Layer (1, 2 or 3) */ +inline int16 layer_number(TMPEG_Header *mpheader) +{ return (int16)((4 - (mpheader->header >> 17) & 3)); } + +/* Checks if error protection is used in the bitstream. */ +inline BOOL error_protection(TMPEG_Header *mpheader) +{ return (!((mpheader->header >> 16) & 1)); } + +/* Sampling frequency index */ +inline int16 sfreq(TMPEG_Header *mpheader) +{ return (int16)((mpheader->header >> 10) & 3);} + +/* Checks whether padding bit is set. */ +inline BOOL padding(TMPEG_Header *mpheader) +{ return (BOOL)((mpheader->header >> 9) & 1); } + +/* Checks if private bit is set. */ +inline BOOL private_bit(TMPEG_Header *mpheader) +{ return (BOOL)((mpheader->header >> 8) & 1); } + +/* Mono, stereo, joint or dual */ +inline int16 mode(TMPEG_Header *mpheader) +{ return (int16)((mpheader->header >> 6) & 3); } + +/* Value of mode extension field */ +inline int16 mode_extension(TMPEG_Header *mpheader) +{ return (int16)((mpheader->header >> 4) & 3); } + +/* Checks whether copyright bit is set. */ +inline BOOL copyright(TMPEG_Header *mpheader) +{ return (BOOL)((mpheader->header >> 3) & 1); } + +/* Checks whether original bit. */ +inline BOOL original(TMPEG_Header *mpheader) +{ return (BOOL)((mpheader->header >> 2) & 1); } + +/* Value of bitrate field */ +inline int16 bit_rate_idx(TMPEG_Header *mpheader) +{ return ((int16)((mpheader->header >> 12) & 0xF)); } + +/* Bitrate */ +inline int16 bit_rate(TMPEG_Header *mpheader) +{ return (bitrate[version(mpheader)][(int16)((mpheader->header >> 12) & 0xF)]); } + +/* Number of channels; 1 for mono, 2 for stereo */ +inline int16 channels(TMPEG_Header *mpheader) +{ return ((int16)((mode(mpheader) == MPG_MD_MONO) ? (int16)1 : (int16)2));} + +inline const int16 *GetBitRateTable(TMPEG_Header *mpheader) +{ return (&bitrate[version(mpheader)][0]); } + +/* Sampling frequency */ +inline int32 frequency(TMPEG_Header *mpheader) +{ return (s_freq[(mpheader->header & 0x100000) ? version(mpheader):2][sfreq(mpheader)]); } + +/* Frame length in milliseconds */ +inline int32 GetFrameTime(TMPEG_Header *mpheader) +{ return (framelength[sfreq(mpheader) + (mp25version(mpheader)) * 3]); } + +#endif /* MPHEADER_H_ */