--- /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_ */