author | Mikael Laine <mikael.laine@ixonos.com> |
Fri, 29 Jan 2010 14:08:33 +0200 | |
changeset 0 | 951a5db380a0 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2010 Ixonos Plc. |
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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 the "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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* Ixonos Plc |
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Committing the Video Editor package under the Eclipse Public License
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* |
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* Description: |
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Committing the Video Editor package under the Eclipse Public License
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* |
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Committing the Video Editor package under the Eclipse Public License
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*/ |
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|
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#ifndef MP3_DEF_H_ |
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#define MP3_DEF_H_ |
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|
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/*- Project Headers. --*/ |
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#include "defines.h" |
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|
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/************************************************************************** |
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External Objects Provided |
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*************************************************************************/ |
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|
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/*-- General MPx Definitions. --*/ |
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#ifndef PI |
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#define PI (3.14159265358979) |
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#endif |
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#define MPEG_AUDIO_ID (1) |
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#define MPEG_PHASE2_LSF (0) |
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#define SBLIMIT (32) |
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#define SSLIMIT (18) |
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#define MAX_MONO_SAMPLES (SBLIMIT * SSLIMIT) |
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#define HAN_SIZE (512) |
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#define NUM_SUBWIN (16) |
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#define SCALE (32768L) |
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#define SYNC_WORD ((long) 0x7ff) |
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#define SYNC_WORD_LENGTH (11) |
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#define HEADER_BITS (20) |
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#define MAX_LONG_SFB_BANDS (22) |
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#define MAX_SHORT_SFB_BANDS (13) |
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#define MIN_MP3FRAMELEN (1440) |
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#define MAX_BITRESER_SIZE (512) |
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#define CRC_MAX_PAYLOAD (34) |
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|
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/*-- MPEG Header Definitions - Mode Values --*/ |
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#define MPG_MD_STEREO (0) |
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#define MPG_MD_JOINT_STEREO (1) |
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#define MPG_MD_DUAL_CHANNEL (2) |
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#define MPG_MD_MONO (3) |
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|
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/*-- Some Useful Macros. --*/ |
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#ifdef MIN |
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#undef MIN |
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#endif |
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#define MIN(A, B) ((A) < (B) ? (A) : (B)) |
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|
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#ifdef MAX |
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#undef MAX |
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#endif |
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#define MAX(A, B) ((A) > (B) ? (A) : (B)) |
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|
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/*-- Channel definitions. --*/ |
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#define MONO_CHAN (0) |
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//#define MAX_CHANNELS (2) |
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#define LEFT_CHANNEL (MONO_CHAN) |
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#define RIGHT_CHANNEL (MONO_CHAN + 1) |
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|
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/* |
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Purpose: Masks those bit fields from the header to zero that |
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do not remain fixed from frame to frame. |
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Explanation: Following fields are assumed to be fixed : |
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* 12th bit from the sync word |
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* version |
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* layer description |
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* sampling rate |
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* channel mode (layer 3 only) |
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* copyright bit |
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* original bit |
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* de-emphasis |
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|
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Following fields can vary from frame to frame : |
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* protection bit |
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* bit rate |
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* padding bit |
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* private bit |
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* channel mode extension |
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*/ |
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#define HEADER_MASK(header) ((uint32)header & 0x001E0CCF) |
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|
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/* |
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Purpose: Macro to extract layer description. |
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Explanation: This is the bit value, use MP_Header::layer_number method |
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to interpret this value. */ |
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#define LAYER_MASK(header) (((uint32)header >> 17) & 3) |
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|
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/* |
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Purpose: Layer III flags. |
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Explanation: - */ |
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typedef enum LayerIIIFlags |
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{ |
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WINDOW_SWITCHING_FLAG = 4, |
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MIXED_BLOCK_FLAG = 8, |
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PRE_FLAG = 16, |
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SCALEFAC_SCALE = 32, |
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COUNT_1_TABLE_SELECT = 64 |
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|
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} Layer_III_Flags; |
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|
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/* |
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Purpose: Stereo modes for layer III. |
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Explanation: - */ |
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typedef enum StereoMode |
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{ |
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ONLY_MONO, |
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ONLY_STEREO, |
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MS_STEREO, |
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IS_STEREO, |
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LSF_IS_STEREO |
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|
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} StereoMode; |
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127 |
|
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/* |
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Purpose: Block types for layer III. |
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Explanation: The first four describe the actual block type for each subband, |
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the rest of the declarations describe the block type for the |
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whole frame. */ |
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133 |
|
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typedef enum MP3_WINDOW_TYPE |
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{ |
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ONLY_LONG_WINDOW, |
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LONG_SHORT_WINDOW, |
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ONLY_SHORT_WINDOW, |
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SHORT_LONG_WINDOW, |
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MIXED_BLOCK_MODE, |
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SHORT_BLOCK_MODE, |
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LONG_BLOCK_MODE |
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143 |
|
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} MP3_WINDOW_TYPE, MP3WindowType; |
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145 |
|
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/* |
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Purpose: Structure to hold scalefactor band parameters. |
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Explanation: - */ |
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typedef struct SFBAND_DATA_STR |
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{ |
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int16 l[23]; /* long block. */ |
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int16 s[14]; /* short block. */ |
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153 |
|
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} SFBAND_DATA; |
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155 |
|
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/* |
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Purpose: Number of bits reserved for decoding each group |
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of scalefactors. |
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159 |
Explanation: - */ |
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typedef struct SFBITS_DATA_STR |
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161 |
{ |
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int16 l[5]; |
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int16 s[3]; |
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164 |
|
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} SFBITS_DATA; |
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166 |
|
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/* |
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Purpose: Sync seek code. |
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169 |
Explanation: - */ |
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typedef enum MIX_SYNC_STATUS |
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{ |
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LAYER1_STREAM_MIX, |
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LAYER2_STREAM_MIX, |
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LAYER3_STREAM_MIX, |
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FIRST_FRAME_WITH_LAYER1, |
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FIRST_FRAME_WITH_LAYER2, |
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FIRST_FRAME_WITH_LAYER3 |
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178 |
|
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} MIX_SYNC_STATUS; |
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180 |
|
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#endif /* MP3_DEF_H_ */ |