+++ /dev/null
-/*****************************************************************************
- * audio_constants.h : defines the MPEG1 Layer I-II audio constants and tables
- *****************************************************************************
- * Copyright (C) 1999, 2000 VideoLAN
- *
- * Authors:
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- *****************************************************************************/
-
-
-/*****************************************************************************
- * 32 bits (4 bytes) audio frame header definitions
- *****************************************************************************/
-/*
- * syncword == `1111 1111 1111'
- */
-#define ADEC_HEADER_SYNCWORD_MASK 0xFFF00000
-#define ADEC_HEADER_SYNCWORD_SHIFT 20
-
-/* ID :
- *
- * `0' == reserved
- * `1' == ISO/CEI 11172-3
- */
-#define ADEC_HEADER_ID_MASK 0x00080000
-#define ADEC_HEADER_ID_SHIFT 19
-
-/*
- * Layer :
- *
- * - `00' == reserved
- * - `01' == Layer III
- * - `10' == Layer II
- * - `11' == Layer I
- */
-#define ADEC_HEADER_LAYER_MASK 0x00060000
-#define ADEC_HEADER_LAYER_SHIFT 17
-
-#define ADEC_HEADER_LAYER_1 0x00060000
-#define ADEC_HEADER_LAYER_2 0x00040000
-#define ADEC_HEADER_LAYER_3 0x00020000
-
-/* protection_bit */
-#define ADEC_HEADER_PROTECTION_BIT_MASK 0x00010000
-#define ADEC_HEADER_PROTECTION_BIT_SHIFT 16
-
-/* bitrate_index */
-#define ADEC_HEADER_BITRATE_INDEX_MASK 0x0000F000
-#define ADEC_HEADER_BITRATE_INDEX_SHIFT 12
-
-/*
- * sampling_frequency :
- *
- * - `00' == 44100 Hz
- * - `01' == 48000 Hz
- * - `10' == 32000 Hz
- * - `11' == reserved
- */
-#define ADEC_HEADER_SAMPLING_FREQUENCY_MASK 0x00000C00
-#define ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT 10
-
-/* padding_bit */
-#define ADEC_HEADER_PADDING_BIT_MASK 0x00000200
-#define ADEC_HEADER_PADDING_BIT_SHIFT 9
-
-/* private_bit */
-#define ADEC_HEADER_PRIVATE_BIT_MASK 0x00000100
-#define ADEC_HEADER_PRIVATE_BIT_SHIFT 8
-
-/*
- * mode :
- *
- * - `00' == stereo (stereo mode)
- * - `01' == combined stereo (stereo mode)
- * - `10' == two channels (stereo mode)
- * - `11' == one channel (mono mode)
- */
-#define ADEC_HEADER_MODE_MASK 0x000000C0
-#define ADEC_HEADER_MODE_SHIFT 6
-
-/* mode_extension */
-#define ADEC_HEADER_MODE_EXTENSION_MASK 0x00000030
-#define ADEC_HEADER_MODE_EXTENSION_SHIFT 4
-
-/* copyright */
-#define ADEC_HEADER_COPYRIGHT_MASK 0x00000008
-#define ADEC_HEADER_COPYRIGHT_SHIFT 3
-
-/* original/copy */
-#define ADEC_HEADER_ORIGINAL_COPY_MASK 0x00000004
-#define ADEC_HEADER_ORIGINAL_COPY_SHIFT 2
-
-/* emphasis */
-#define ADEC_HEADER_EMPHASIS_MASK 0x00000003
-#define ADEC_HEADER_EMPHASIS_SHIFT 0
-
-
-/*****************************************************************************
- * frame sizes = f( layer, padding_bit, sampling_frequency, bitrate_index )
- *****************************************************************************
- * ISO/IEC 11172-3 2.4.3.1 explains how to find out the number of bytes between
- * two consecutive syncwords. In order to work out the body size of the frame,
- * we just have to substract 4 bytes for the header size.
- *
- * = Layer I : (slot_size == 4 bytes)
- * - padding_bit == 0 :
- * frame_size = ( floor( 12 * bitrate(layer, bitrate_index) / sampling_frequency ) * 4 ) - 4
- * - padding_bit == 1 :
- * frame_size = ( ceil( 12 * bitrate(layer, bitrate_index) / sampling_frequency ) * 4 ) - 4
- *
- * = Layer II : (slot_size == 1 byte)
- * - padding_bit == 0 :
- * frame_size = ( floor( 144 * bitrate(layer, bitrate_index) / sampling_frequency ) * 1 ) - 4
- * - padding_bit == 1 :
- * frame_size = ( ceil( 144 * bitrate(layer, bitrate_index) / sampling_frequency ) * 1 ) - 4
- *
- * The frame sizes are stored in the following array :
- * frame_size = ADEC_FRAME_SIZE[ 128*layer + 64*padding_bit + 16*sampling_frequency + bitrate_index ]
- *****************************************************************************/
-#if 0
-#define ADEC_FRAME_SIZE \
-{ \
- /* Layer == `00' (reserved) */ \
-\
- /* padding_bit == `0' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
- /* padding_bit == `1' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
-\
- /* Layer == `01' (III) */ \
-\
- /* padding_bit == `0' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
- /* padding_bit == `1' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
-\
- /* Layer == `10' (II) */ \
-\
- /* padding_bit == `0' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 100, 152, 178, 204, 257, 309, 361, 413, 518, 622, 727, 831, 1040, 1249, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 92, 140, 164, 188, 236, 284, 332, 380, 476, 572, 668, 764, 956, 1148, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 140, 212, 248, 284, 356, 428, 500, 572, 716, 860, 1004, 1148, 1436, 1724, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
- /* padding_bit == `1' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 101, 153, 179, 205, 258, 310, 362, 414, 519, 623, 728, 832, 1041, 1250, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 92, 140, 164, 188, 236, 284, 332, 380, 476, 572, 668, 764, 956, 1148, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 140, 212, 248, 284, 356, 428, 500, 572, 716, 860, 1004, 1148, 1436, 1724, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
-\
- /* Layer == `11' (I) */ \
-\
- /* padding_bit == `0' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 28, 64, 100, 132, 168, 204, 236, 272, 308, 344, 376, 412, 448, 480, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 28, 60, 92, 124, 156, 188, 220, 252, 284, 316, 348, 380, 412, 444, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 44, 92, 140, 188, 236, 284, 332, 380, 428, 476, 524, 572, 620, 668, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-\
- /* padding_bit == `1' */ \
-\
- /* sampling_frequency == `00' (44100 Hz) */ \
- 0, 32, 68, 104, 136, 172, 208, 240, 276, 312, 348, 380, 416, 452, 484, 0, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- 0, 28, 60, 92, 124, 156, 188, 220, 252, 284, 316, 348, 380, 412, 444, 0, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- 0, 44, 92, 140, 188, 236, 284, 332, 380, 428, 476, 524, 572, 620, 668, 0, \
- /* sampling_frequency == `11' (reserved) */ \
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \
-}
-#endif
-
-
-/*****************************************************************************
- * scale factors = f( scalefactor ) (Layer I & II, see ISO/IEC 11172-3 2.4.1)
- *****************************************************************************
- * Theses values are 2^(1 - index/3) (see ISO/IEC 11172-3 2.4.2.5)
- *****************************************************************************/
-#define ADEC_SCALE_FACTOR \
-{ \
- /* 0*/ 2.00000000000000, /* 1*/ 1.58740105196820, /* 2*/ 1.25992104989487,\
- /* 3*/ 1.00000000000000, /* 4*/ 0.79370052598410, /* 5*/ 0.62996052494744,\
- /* 6*/ 0.50000000000000, /* 7*/ 0.39685026299205, /* 8*/ 0.31498026247372,\
- /* 9*/ 0.25000000000000, /*10*/ 0.19842513149602, /*11*/ 0.15749013123686,\
- /*12*/ 0.12500000000000, /*13*/ 0.09921256574801, /*14*/ 0.07874506561843,\
- /*15*/ 0.06250000000000, /*16*/ 0.04960628287401, /*17*/ 0.03937253280921,\
- /*18*/ 0.03125000000000, /*19*/ 0.02480314143700, /*20*/ 0.01968626640461,\
- /*21*/ 0.01562500000000, /*22*/ 0.01240157071850, /*23*/ 0.00984313320230,\
- /*24*/ 0.00781250000000, /*25*/ 0.00620078535925, /*26*/ 0.00492156660115,\
- /*27*/ 0.00390625000000, /*28*/ 0.00310039267963, /*29*/ 0.00246078330058,\
- /*30*/ 0.00195312500000, /*31*/ 0.00155019633981, /*32*/ 0.00123039165029,\
- /*33*/ 0.00097656250000, /*34*/ 0.00077509816991, /*35*/ 0.00061519582514,\
- /*36*/ 0.00048828125000, /*37*/ 0.00038754908495, /*38*/ 0.00030759791257,\
- /*39*/ 0.00024414062500, /*40*/ 0.00019377454248, /*41*/ 0.00015379895629,\
- /*42*/ 0.00012207031250, /*43*/ 0.00009688727124, /*44*/ 0.00007689947814,\
- /*45*/ 0.00006103515625, /*46*/ 0.00004844363562, /*47*/ 0.00003844973907,\
- /*48*/ 0.00003051757813, /*49*/ 0.00002422181781, /*50*/ 0.00001922486954,\
- /*51*/ 0.00001525878906, /*52*/ 0.00001211090890, /*53*/ 0.00000961243477,\
- /*54*/ 0.00000762939453, /*55*/ 0.00000605545445, /*56*/ 0.00000480621738,\
- /*57*/ 0.00000381469727, /*58*/ 0.00000302772723, /*59*/ 0.00000240310869,\
- /*60*/ 0.00000190734863, /*61*/ 0.00000151386361, /*62*/ 0.00000120155435,\
- /*63*/ 0.0 /* XXX?? invalid scale factor ? */ \
-}
-
-
-/*****************************************************************************
- * Layer I definitions
- *****************************************************************************/
-
-/*
- * slope table = f( allocation[ch][sb] (see ISO/IEC 11171-3 2.4.1) )
- */
-#define ADEC_LAYER1_SLOPE \
-{ \
- /* 0*/ 0.0, /* no sample */ \
- /* 1*/ 2.0/3, \
- /* 2*/ 2.0/7, \
- /* 3*/ 2.0/15, \
- /* 4*/ 2.0/31, \
- /* 5*/ 2.0/63, \
- /* 6*/ 2.0/127, \
- /* 7*/ 2.0/255, \
- /* 8*/ 2.0/511, \
- /* 9*/ 2.0/1023, \
- /*10*/ 2.0/2047, \
- /*11*/ 2.0/4095, \
- /*12*/ 2.0/8191, \
- /*13*/ 2.0/16383, \
- /*14*/ 2.0/32767, \
- /*15*/ 0.0 /* invalid bit allocation */ \
-}
-
-/*
- * offset table = f( allocation[ch][sb] (see ISO/IEC 11172-3 2.4.1) )
- */
-#define ADEC_LAYER1_OFFSET \
-{ \
- /* 0*/ 0.0, /* no sample */ \
- /* 1*/ -2.0/3, \
- /* 2*/ -6.0/7, \
- /* 3*/ -14.0/15, \
- /* 4*/ -30.0/31, \
- /* 5*/ -62.0/63, \
- /* 6*/ -126.0/127, \
- /* 7*/ -254.0/255, \
- /* 8*/ -510.0/511, \
- /* 9*/ -1022.0/1023, \
- /*10*/ -2046.0/2047, \
- /*11*/ -4094.0/4095, \
- /*12*/ -8190.0/8191, \
- /*13*/ -16382.0/16383, \
- /*14*/ -32766.0/32767, \
- /*15*/ 0.0 /* invalid bit allocation */ \
-}
-
-
-/*****************************************************************************
- * Layer II definitions
- *****************************************************************************/
-
-/*
- * Bitrate PER CHANNEL index = f( mode, bitrate_index )
- * (see ISO/IEC 11172-3 2.4.2.3)
- *
- * - This index is used in the ADEC_LAYER2_SBLIMIT and ADEC_LAYER2_NBAL tables.
- *
- * - 0 == forbidden mode/bitrate_index combination
- * - 1 == 32 kbits/s per channel
- * - 2 == 48 kbits/s per channel
- * - 3 == 56 kbits/s per channel
- * - 4 == 64 kbits/s per channel
- * - 5 == 80 kbits/s per channel
- * - 6 == 96 kbits/s per channel
- * - 7 == 112 kbits/s per channel
- * - 8 == 128 kbits/s per channel
- * - 9 == 160 kbits/s per channel
- * - 10 == 192 kbits/s per channel
- */
-#define ADEC_LAYER2_BITRATE_PER_CHANNEL_INDEX \
-{ \
- /* mode == `00' (stereo) */ \
- { 0, 0, 0, 0, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, \
- /* mode == `01' (combined stereo) */ \
- { 0, 0, 0, 0, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, \
- /* mode == `10' (two channels) */ \
- { 0, 0, 0, 0, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, \
- /* mode == `11' (one channel) */ \
- { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 0, 0, 0, 0 } \
-}
-
-/*
- * Number of subbands = f( sampling_frequency, bitrate_per_channel_index )
- * (see ISO/IEC 11172-3 Annex B.2)
- */
-#define ADEC_LAYER2_SBLIMIT \
-{ \
- /* sampling_frequency == `00' (44100 Hz) */ \
- { 0, 8, 8, 27, 27, 27, 30, 30, 30, 30, 30}, \
- /* sampling_frequency == `01' (48000 Hz) */ \
- { 0, 8, 8, 27, 27, 27, 27, 27, 27, 27, 27}, \
- /* sampling_frequency == `10' (32000 Hz) */ \
- { 0, 12, 12, 27, 27, 27, 30, 30, 30, 30, 30} \
-}
-
-/*
- * Number of bits allocated = f( bitrate_per_channel_index, subband )
- * (see ISO/IEC 11172-3 Annex B.2)
- */
-#define ADEC_LAYER2_NBAL \
-{ \
- /* bitrate_per_channel_index <= 2 */ \
- { 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, \
- /* bitrate_per_channel_index > 2 */ \
- { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 0, 0} \
-}
-
-/*
- * = When 3 samples are grouped in one codeword, we have to ungroup them in
- * order to dequantize the samples (see ISO/IEC 11172-3 2.4.3.3.4) :
- * 1) Ungrouping
- * for ( i = 0; i < 3; i++ )
- * {
- * s[i] = c % nlevels;
- * c = c / nlevels;
- * }
- * 2) Requantization
- *
- * = We pre-calculated all this, and stored the results in the following
- * ungroup`nlevels' tables. ISO/IEC 11172-3 Annex B.4 tells us that the
- * samples are grouped only when nlevels == 3, 5, or 9.
- *
- * = ADEC_LAYER2_UNGROUPn = f(3 * n*n*n)
- */
-#define ADEC_LAYER2_UNGROUP3 \
-{ \
- -2.0/3, -2.0/3, -2.0/3, \
- .0 , -2.0/3, -2.0/3, \
- 2.0/3, -2.0/3, -2.0/3, \
- -2.0/3, .0 , -2.0/3, \
- .0 , .0 , -2.0/3, \
- 2.0/3, .0 , -2.0/3, \
- -2.0/3, 2.0/3, -2.0/3, \
- .0 , 2.0/3, -2.0/3, \
- 2.0/3, 2.0/3, -2.0/3, \
- -2.0/3, -2.0/3, .0 , \
- .0 , -2.0/3, .0 , \
- 2.0/3, -2.0/3, .0 , \
- -2.0/3, .0 , .0 , \
- .0 , .0 , .0 , \
- 2.0/3, .0 , .0 , \
- -2.0/3, 2.0/3, .0 , \
- .0 , 2.0/3, .0 , \
- 2.0/3, 2.0/3, .0 , \
- -2.0/3, -2.0/3, 2.0/3, \
- .0 , -2.0/3, 2.0/3, \
- 2.0/3, -2.0/3, 2.0/3, \
- -2.0/3, .0 , 2.0/3, \
- .0 , .0 , 2.0/3, \
- 2.0/3, .0 , 2.0/3, \
- -2.0/3, 2.0/3, 2.0/3, \
- .0 , 2.0/3, 2.0/3, \
- 2.0/3, 2.0/3, 2.0/3 \
-}
-
-#define ADEC_LAYER2_UNGROUP5 \
-{ \
- -.8, -.8, -.8, \
- -.4, -.8, -.8, \
- .0, -.8, -.8, \
- .4, -.8, -.8, \
- .8, -.8, -.8, \
- -.8, -.4, -.8, \
- -.4, -.4, -.8, \
- .0, -.4, -.8, \
- .4, -.4, -.8, \
- .8, -.4, -.8, \
- -.8, .0, -.8, \
- -.4, .0, -.8, \
- .0, .0, -.8, \
- .4, .0, -.8, \
- .8, .0, -.8, \
- -.8, .4, -.8, \
- -.4, .4, -.8, \
- .0, .4, -.8, \
- .4, .4, -.8, \
- .8, .4, -.8, \
- -.8, .8, -.8, \
- -.4, .8, -.8, \
- .0, .8, -.8, \
- .4, .8, -.8, \
- .8, .8, -.8, \
- -.8, -.8, -.4, \
- -.4, -.8, -.4, \
- .0, -.8, -.4, \
- .4, -.8, -.4, \
- .8, -.8, -.4, \
- -.8, -.4, -.4, \
- -.4, -.4, -.4, \
- .0, -.4, -.4, \
- .4, -.4, -.4, \
- .8, -.4, -.4, \
- -.8, .0, -.4, \
- -.4, .0, -.4, \
- .0, .0, -.4, \
- .4, .0, -.4, \
- .8, .0, -.4, \
- -.8, .4, -.4, \
- -.4, .4, -.4, \
- .0, .4, -.4, \
- .4, .4, -.4, \
- .8, .4, -.4, \
- -.8, .8, -.4, \
- -.4, .8, -.4, \
- .0, .8, -.4, \
- .4, .8, -.4, \
- .8, .8, -.4, \
- -.8, -.8, .0, \
- -.4, -.8, .0, \
- .0, -.8, .0, \
- .4, -.8, .0, \
- .8, -.8, .0, \
- -.8, -.4, .0, \
- -.4, -.4, .0, \
- .0, -.4, .0, \
- .4, -.4, .0, \
- .8, -.4, .0, \
- -.8, .0, .0, \
- -.4, .0, .0, \
- .0, .0, .0, \
- .4, .0, .0, \
- .8, .0, .0, \
- -.8, .4, .0, \
- -.4, .4, .0, \
- .0, .4, .0, \
- .4, .4, .0, \
- .8, .4, .0, \
- -.8, .8, .0, \
- -.4, .8, .0, \
- .0, .8, .0, \
- .4, .8, .0, \
- .8, .8, .0, \
- -.8, -.8, .4, \
- -.4, -.8, .4, \
- .0, -.8, .4, \
- .4, -.8, .4, \
- .8, -.8, .4, \
- -.8, -.4, .4, \
- -.4, -.4, .4, \
- .0, -.4, .4, \
- .4, -.4, .4, \
- .8, -.4, .4, \
- -.8, .0, .4, \
- -.4, .0, .4, \
- .0, .0, .4, \
- .4, .0, .4, \
- .8, .0, .4, \
- -.8, .4, .4, \
- -.4, .4, .4, \
- .0, .4, .4, \
- .4, .4, .4, \
- .8, .4, .4, \
- -.8, .8, .4, \
- -.4, .8, .4, \
- .0, .8, .4, \
- .4, .8, .4, \
- .8, .8, .4, \
- -.8, -.8, .8, \
- -.4, -.8, .8, \
- .0, -.8, .8, \
- .4, -.8, .8, \
- .8, -.8, .8, \
- -.8, -.4, .8, \
- -.4, -.4, .8, \
- .0, -.4, .8, \
- .4, -.4, .8, \
- .8, -.4, .8, \
- -.8, .0, .8, \
- -.4, .0, .8, \
- .0, .0, .8, \
- .4, .0, .8, \
- .8, .0, .8, \
- -.8, .4, .8, \
- -.4, .4, .8, \
- .0, .4, .8, \
- .4, .4, .8, \
- .8, .4, .8, \
- -.8, .8, .8, \
- -.4, .8, .8, \
- .0, .8, .8, \
- .4, .8, .8, \
- .8, .8, .8 \
-}
-
-#define ADEC_LAYER2_UNGROUP9 \
-{ \
- -8.0/9, -8.0/9, -8.0/9, \
- -6.0/9, -8.0/9, -8.0/9, \
- -4.0/9, -8.0/9, -8.0/9, \
- -2.0/9, -8.0/9, -8.0/9, \
- .0 , -8.0/9, -8.0/9, \
- 2.0/9, -8.0/9, -8.0/9, \
- 4.0/9, -8.0/9, -8.0/9, \
- 6.0/9, -8.0/9, -8.0/9, \
- 8.0/9, -8.0/9, -8.0/9, \
- -8.0/9, -6.0/9, -8.0/9, \
- -6.0/9, -6.0/9, -8.0/9, \
- -4.0/9, -6.0/9, -8.0/9, \
- -2.0/9, -6.0/9, -8.0/9, \
- .0 , -6.0/9, -8.0/9, \
- 2.0/9, -6.0/9, -8.0/9, \
- 4.0/9, -6.0/9, -8.0/9, \
- 6.0/9, -6.0/9, -8.0/9, \
- 8.0/9, -6.0/9, -8.0/9, \
- -8.0/9, -4.0/9, -8.0/9, \
- -6.0/9, -4.0/9, -8.0/9, \
- -4.0/9, -4.0/9, -8.0/9, \
- -2.0/9, -4.0/9, -8.0/9, \
- .0 , -4.0/9, -8.0/9, \
- 2.0/9, -4.0/9, -8.0/9, \
- 4.0/9, -4.0/9, -8.0/9, \
- 6.0/9, -4.0/9, -8.0/9, \
- 8.0/9, -4.0/9, -8.0/9, \
- -8.0/9, -2.0/9, -8.0/9, \
- -6.0/9, -2.0/9, -8.0/9, \
- -4.0/9, -2.0/9, -8.0/9, \
- -2.0/9, -2.0/9, -8.0/9, \
- .0 , -2.0/9, -8.0/9, \
- 2.0/9, -2.0/9, -8.0/9, \
- 4.0/9, -2.0/9, -8.0/9, \
- 6.0/9, -2.0/9, -8.0/9, \
- 8.0/9, -2.0/9, -8.0/9, \
- -8.0/9, .0 , -8.0/9, \
- -6.0/9, .0 , -8.0/9, \
- -4.0/9, .0 , -8.0/9, \
- -2.0/9, .0 , -8.0/9, \
- .0 , .0 , -8.0/9, \
- 2.0/9, .0 , -8.0/9, \
- 4.0/9, .0 , -8.0/9, \
- 6.0/9, .0 , -8.0/9, \
- 8.0/9, .0 , -8.0/9, \
- -8.0/9, 2.0/9, -8.0/9, \
- -6.0/9, 2.0/9, -8.0/9, \
- -4.0/9, 2.0/9, -8.0/9, \
- -2.0/9, 2.0/9, -8.0/9, \
- .0 , 2.0/9, -8.0/9, \
- 2.0/9, 2.0/9, -8.0/9, \
- 4.0/9, 2.0/9, -8.0/9, \
- 6.0/9, 2.0/9, -8.0/9, \
- 8.0/9, 2.0/9, -8.0/9, \
- -8.0/9, 4.0/9, -8.0/9, \
- -6.0/9, 4.0/9, -8.0/9, \
- -4.0/9, 4.0/9, -8.0/9, \
- -2.0/9, 4.0/9, -8.0/9, \
- .0 , 4.0/9, -8.0/9, \
- 2.0/9, 4.0/9, -8.0/9, \
- 4.0/9, 4.0/9, -8.0/9, \
- 6.0/9, 4.0/9, -8.0/9, \
- 8.0/9, 4.0/9, -8.0/9, \
- -8.0/9, 6.0/9, -8.0/9, \
- -6.0/9, 6.0/9, -8.0/9, \
- -4.0/9, 6.0/9, -8.0/9, \
- -2.0/9, 6.0/9, -8.0/9, \
- .0 , 6.0/9, -8.0/9, \
- 2.0/9, 6.0/9, -8.0/9, \
- 4.0/9, 6.0/9, -8.0/9, \
- 6.0/9, 6.0/9, -8.0/9, \
- 8.0/9, 6.0/9, -8.0/9, \
- -8.0/9, 8.0/9, -8.0/9, \
- -6.0/9, 8.0/9, -8.0/9, \
- -4.0/9, 8.0/9, -8.0/9, \
- -2.0/9, 8.0/9, -8.0/9, \
- .0 , 8.0/9, -8.0/9, \
- 2.0/9, 8.0/9, -8.0/9, \
- 4.0/9, 8.0/9, -8.0/9, \
- 6.0/9, 8.0/9, -8.0/9, \
- 8.0/9, 8.0/9, -8.0/9, \
- -8.0/9, -8.0/9, -6.0/9, \
- -6.0/9, -8.0/9, -6.0/9, \
- -4.0/9, -8.0/9, -6.0/9, \
- -2.0/9, -8.0/9, -6.0/9, \
- .0 , -8.0/9, -6.0/9, \
- 2.0/9, -8.0/9, -6.0/9, \
- 4.0/9, -8.0/9, -6.0/9, \
- 6.0/9, -8.0/9, -6.0/9, \
- 8.0/9, -8.0/9, -6.0/9, \
- -8.0/9, -6.0/9, -6.0/9, \
- -6.0/9, -6.0/9, -6.0/9, \
- -4.0/9, -6.0/9, -6.0/9, \
- -2.0/9, -6.0/9, -6.0/9, \
- .0 , -6.0/9, -6.0/9, \
- 2.0/9, -6.0/9, -6.0/9, \
- 4.0/9, -6.0/9, -6.0/9, \
- 6.0/9, -6.0/9, -6.0/9, \
- 8.0/9, -6.0/9, -6.0/9, \
- -8.0/9, -4.0/9, -6.0/9, \
- -6.0/9, -4.0/9, -6.0/9, \
- -4.0/9, -4.0/9, -6.0/9, \
- -2.0/9, -4.0/9, -6.0/9, \
- .0 , -4.0/9, -6.0/9, \
- 2.0/9, -4.0/9, -6.0/9, \
- 4.0/9, -4.0/9, -6.0/9, \
- 6.0/9, -4.0/9, -6.0/9, \
- 8.0/9, -4.0/9, -6.0/9, \
- -8.0/9, -2.0/9, -6.0/9, \
- -6.0/9, -2.0/9, -6.0/9, \
- -4.0/9, -2.0/9, -6.0/9, \
- -2.0/9, -2.0/9, -6.0/9, \
- .0 , -2.0/9, -6.0/9, \
- 2.0/9, -2.0/9, -6.0/9, \
- 4.0/9, -2.0/9, -6.0/9, \
- 6.0/9, -2.0/9, -6.0/9, \
- 8.0/9, -2.0/9, -6.0/9, \
- -8.0/9, .0 , -6.0/9, \
- -6.0/9, .0 , -6.0/9, \
- -4.0/9, .0 , -6.0/9, \
- -2.0/9, .0 , -6.0/9, \
- .0 , .0 , -6.0/9, \
- 2.0/9, .0 , -6.0/9, \
- 4.0/9, .0 , -6.0/9, \
- 6.0/9, .0 , -6.0/9, \
- 8.0/9, .0 , -6.0/9, \
- -8.0/9, 2.0/9, -6.0/9, \
- -6.0/9, 2.0/9, -6.0/9, \
- -4.0/9, 2.0/9, -6.0/9, \
- -2.0/9, 2.0/9, -6.0/9, \
- .0 , 2.0/9, -6.0/9, \
- 2.0/9, 2.0/9, -6.0/9, \
- 4.0/9, 2.0/9, -6.0/9, \
- 6.0/9, 2.0/9, -6.0/9, \
- 8.0/9, 2.0/9, -6.0/9, \
- -8.0/9, 4.0/9, -6.0/9, \
- -6.0/9, 4.0/9, -6.0/9, \
- -4.0/9, 4.0/9, -6.0/9, \
- -2.0/9, 4.0/9, -6.0/9, \
- .0 , 4.0/9, -6.0/9, \
- 2.0/9, 4.0/9, -6.0/9, \
- 4.0/9, 4.0/9, -6.0/9, \
- 6.0/9, 4.0/9, -6.0/9, \
- 8.0/9, 4.0/9, -6.0/9, \
- -8.0/9, 6.0/9, -6.0/9, \
- -6.0/9, 6.0/9, -6.0/9, \
- -4.0/9, 6.0/9, -6.0/9, \
- -2.0/9, 6.0/9, -6.0/9, \
- .0 , 6.0/9, -6.0/9, \
- 2.0/9, 6.0/9, -6.0/9, \
- 4.0/9, 6.0/9, -6.0/9, \
- 6.0/9, 6.0/9, -6.0/9, \
- 8.0/9, 6.0/9, -6.0/9, \
- -8.0/9, 8.0/9, -6.0/9, \
- -6.0/9, 8.0/9, -6.0/9, \
- -4.0/9, 8.0/9, -6.0/9, \
- -2.0/9, 8.0/9, -6.0/9, \
- .0 , 8.0/9, -6.0/9, \
- 2.0/9, 8.0/9, -6.0/9, \
- 4.0/9, 8.0/9, -6.0/9, \
- 6.0/9, 8.0/9, -6.0/9, \
- 8.0/9, 8.0/9, -6.0/9, \
- -8.0/9, -8.0/9, -4.0/9, \
- -6.0/9, -8.0/9, -4.0/9, \
- -4.0/9, -8.0/9, -4.0/9, \
- -2.0/9, -8.0/9, -4.0/9, \
- .0 , -8.0/9, -4.0/9, \
- 2.0/9, -8.0/9, -4.0/9, \
- 4.0/9, -8.0/9, -4.0/9, \
- 6.0/9, -8.0/9, -4.0/9, \
- 8.0/9, -8.0/9, -4.0/9, \
- -8.0/9, -6.0/9, -4.0/9, \
- -6.0/9, -6.0/9, -4.0/9, \
- -4.0/9, -6.0/9, -4.0/9, \
- -2.0/9, -6.0/9, -4.0/9, \
- .0 , -6.0/9, -4.0/9, \
- 2.0/9, -6.0/9, -4.0/9, \
- 4.0/9, -6.0/9, -4.0/9, \
- 6.0/9, -6.0/9, -4.0/9, \
- 8.0/9, -6.0/9, -4.0/9, \
- -8.0/9, -4.0/9, -4.0/9, \
- -6.0/9, -4.0/9, -4.0/9, \
- -4.0/9, -4.0/9, -4.0/9, \
- -2.0/9, -4.0/9, -4.0/9, \
- .0 , -4.0/9, -4.0/9, \
- 2.0/9, -4.0/9, -4.0/9, \
- 4.0/9, -4.0/9, -4.0/9, \
- 6.0/9, -4.0/9, -4.0/9, \
- 8.0/9, -4.0/9, -4.0/9, \
- -8.0/9, -2.0/9, -4.0/9, \
- -6.0/9, -2.0/9, -4.0/9, \
- -4.0/9, -2.0/9, -4.0/9, \
- -2.0/9, -2.0/9, -4.0/9, \
- .0 , -2.0/9, -4.0/9, \
- 2.0/9, -2.0/9, -4.0/9, \
- 4.0/9, -2.0/9, -4.0/9, \
- 6.0/9, -2.0/9, -4.0/9, \
- 8.0/9, -2.0/9, -4.0/9, \
- -8.0/9, .0 , -4.0/9, \
- -6.0/9, .0 , -4.0/9, \
- -4.0/9, .0 , -4.0/9, \
- -2.0/9, .0 , -4.0/9, \
- .0 , .0 , -4.0/9, \
- 2.0/9, .0 , -4.0/9, \
- 4.0/9, .0 , -4.0/9, \
- 6.0/9, .0 , -4.0/9, \
- 8.0/9, .0 , -4.0/9, \
- -8.0/9, 2.0/9, -4.0/9, \
- -6.0/9, 2.0/9, -4.0/9, \
- -4.0/9, 2.0/9, -4.0/9, \
- -2.0/9, 2.0/9, -4.0/9, \
- .0 , 2.0/9, -4.0/9, \
- 2.0/9, 2.0/9, -4.0/9, \
- 4.0/9, 2.0/9, -4.0/9, \
- 6.0/9, 2.0/9, -4.0/9, \
- 8.0/9, 2.0/9, -4.0/9, \
- -8.0/9, 4.0/9, -4.0/9, \
- -6.0/9, 4.0/9, -4.0/9, \
- -4.0/9, 4.0/9, -4.0/9, \
- -2.0/9, 4.0/9, -4.0/9, \
- .0 , 4.0/9, -4.0/9, \
- 2.0/9, 4.0/9, -4.0/9, \
- 4.0/9, 4.0/9, -4.0/9, \
- 6.0/9, 4.0/9, -4.0/9, \
- 8.0/9, 4.0/9, -4.0/9, \
- -8.0/9, 6.0/9, -4.0/9, \
- -6.0/9, 6.0/9, -4.0/9, \
- -4.0/9, 6.0/9, -4.0/9, \
- -2.0/9, 6.0/9, -4.0/9, \
- .0 , 6.0/9, -4.0/9, \
- 2.0/9, 6.0/9, -4.0/9, \
- 4.0/9, 6.0/9, -4.0/9, \
- 6.0/9, 6.0/9, -4.0/9, \
- 8.0/9, 6.0/9, -4.0/9, \
- -8.0/9, 8.0/9, -4.0/9, \
- -6.0/9, 8.0/9, -4.0/9, \
- -4.0/9, 8.0/9, -4.0/9, \
- -2.0/9, 8.0/9, -4.0/9, \
- .0 , 8.0/9, -4.0/9, \
- 2.0/9, 8.0/9, -4.0/9, \
- 4.0/9, 8.0/9, -4.0/9, \
- 6.0/9, 8.0/9, -4.0/9, \
- 8.0/9, 8.0/9, -4.0/9, \
- -8.0/9, -8.0/9, -2.0/9, \
- -6.0/9, -8.0/9, -2.0/9, \
- -4.0/9, -8.0/9, -2.0/9, \
- -2.0/9, -8.0/9, -2.0/9, \
- .0 , -8.0/9, -2.0/9, \
- 2.0/9, -8.0/9, -2.0/9, \
- 4.0/9, -8.0/9, -2.0/9, \
- 6.0/9, -8.0/9, -2.0/9, \
- 8.0/9, -8.0/9, -2.0/9, \
- -8.0/9, -6.0/9, -2.0/9, \
- -6.0/9, -6.0/9, -2.0/9, \
- -4.0/9, -6.0/9, -2.0/9, \
- -2.0/9, -6.0/9, -2.0/9, \
- .0 , -6.0/9, -2.0/9, \
- 2.0/9, -6.0/9, -2.0/9, \
- 4.0/9, -6.0/9, -2.0/9, \
- 6.0/9, -6.0/9, -2.0/9, \
- 8.0/9, -6.0/9, -2.0/9, \
- -8.0/9, -4.0/9, -2.0/9, \
- -6.0/9, -4.0/9, -2.0/9, \
- -4.0/9, -4.0/9, -2.0/9, \
- -2.0/9, -4.0/9, -2.0/9, \
- .0 , -4.0/9, -2.0/9, \
- 2.0/9, -4.0/9, -2.0/9, \
- 4.0/9, -4.0/9, -2.0/9, \
- 6.0/9, -4.0/9, -2.0/9, \
- 8.0/9, -4.0/9, -2.0/9, \
- -8.0/9, -2.0/9, -2.0/9, \
- -6.0/9, -2.0/9, -2.0/9, \
- -4.0/9, -2.0/9, -2.0/9, \
- -2.0/9, -2.0/9, -2.0/9, \
- .0 , -2.0/9, -2.0/9, \
- 2.0/9, -2.0/9, -2.0/9, \
- 4.0/9, -2.0/9, -2.0/9, \
- 6.0/9, -2.0/9, -2.0/9, \
- 8.0/9, -2.0/9, -2.0/9, \
- -8.0/9, .0 , -2.0/9, \
- -6.0/9, .0 , -2.0/9, \
- -4.0/9, .0 , -2.0/9, \
- -2.0/9, .0 , -2.0/9, \
- .0 , .0 , -2.0/9, \
- 2.0/9, .0 , -2.0/9, \
- 4.0/9, .0 , -2.0/9, \
- 6.0/9, .0 , -2.0/9, \
- 8.0/9, .0 , -2.0/9, \
- -8.0/9, 2.0/9, -2.0/9, \
- -6.0/9, 2.0/9, -2.0/9, \
- -4.0/9, 2.0/9, -2.0/9, \
- -2.0/9, 2.0/9, -2.0/9, \
- .0 , 2.0/9, -2.0/9, \
- 2.0/9, 2.0/9, -2.0/9, \
- 4.0/9, 2.0/9, -2.0/9, \
- 6.0/9, 2.0/9, -2.0/9, \
- 8.0/9, 2.0/9, -2.0/9, \
- -8.0/9, 4.0/9, -2.0/9, \
- -6.0/9, 4.0/9, -2.0/9, \
- -4.0/9, 4.0/9, -2.0/9, \
- -2.0/9, 4.0/9, -2.0/9, \
- .0 , 4.0/9, -2.0/9, \
- 2.0/9, 4.0/9, -2.0/9, \
- 4.0/9, 4.0/9, -2.0/9, \
- 6.0/9, 4.0/9, -2.0/9, \
- 8.0/9, 4.0/9, -2.0/9, \
- -8.0/9, 6.0/9, -2.0/9, \
- -6.0/9, 6.0/9, -2.0/9, \
- -4.0/9, 6.0/9, -2.0/9, \
- -2.0/9, 6.0/9, -2.0/9, \
- .0 , 6.0/9, -2.0/9, \
- 2.0/9, 6.0/9, -2.0/9, \
- 4.0/9, 6.0/9, -2.0/9, \
- 6.0/9, 6.0/9, -2.0/9, \
- 8.0/9, 6.0/9, -2.0/9, \
- -8.0/9, 8.0/9, -2.0/9, \
- -6.0/9, 8.0/9, -2.0/9, \
- -4.0/9, 8.0/9, -2.0/9, \
- -2.0/9, 8.0/9, -2.0/9, \
- .0 , 8.0/9, -2.0/9, \
- 2.0/9, 8.0/9, -2.0/9, \
- 4.0/9, 8.0/9, -2.0/9, \
- 6.0/9, 8.0/9, -2.0/9, \
- 8.0/9, 8.0/9, -2.0/9, \
- -8.0/9, -8.0/9, .0 , \
- -6.0/9, -8.0/9, .0 , \
- -4.0/9, -8.0/9, .0 , \
- -2.0/9, -8.0/9, .0 , \
- .0 , -8.0/9, .0 , \
- 2.0/9, -8.0/9, .0 , \
- 4.0/9, -8.0/9, .0 , \
- 6.0/9, -8.0/9, .0 , \
- 8.0/9, -8.0/9, .0 , \
- -8.0/9, -6.0/9, .0 , \
- -6.0/9, -6.0/9, .0 , \
- -4.0/9, -6.0/9, .0 , \
- -2.0/9, -6.0/9, .0 , \
- .0 , -6.0/9, .0 , \
- 2.0/9, -6.0/9, .0 , \
- 4.0/9, -6.0/9, .0 , \
- 6.0/9, -6.0/9, .0 , \
- 8.0/9, -6.0/9, .0 , \
- -8.0/9, -4.0/9, .0 , \
- -6.0/9, -4.0/9, .0 , \
- -4.0/9, -4.0/9, .0 , \
- -2.0/9, -4.0/9, .0 , \
- .0 , -4.0/9, .0 , \
- 2.0/9, -4.0/9, .0 , \
- 4.0/9, -4.0/9, .0 , \
- 6.0/9, -4.0/9, .0 , \
- 8.0/9, -4.0/9, .0 , \
- -8.0/9, -2.0/9, .0 , \
- -6.0/9, -2.0/9, .0 , \
- -4.0/9, -2.0/9, .0 , \
- -2.0/9, -2.0/9, .0 , \
- .0 , -2.0/9, .0 , \
- 2.0/9, -2.0/9, .0 , \
- 4.0/9, -2.0/9, .0 , \
- 6.0/9, -2.0/9, .0 , \
- 8.0/9, -2.0/9, .0 , \
- -8.0/9, .0 , .0 , \
- -6.0/9, .0 , .0 , \
- -4.0/9, .0 , .0 , \
- -2.0/9, .0 , .0 , \
- .0 , .0 , .0 , \
- 2.0/9, .0 , .0 , \
- 4.0/9, .0 , .0 , \
- 6.0/9, .0 , .0 , \
- 8.0/9, .0 , .0 , \
- -8.0/9, 2.0/9, .0 , \
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- -4.0/9, 2.0/9, .0 , \
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- .0 , 2.0/9, .0 , \
- 2.0/9, 2.0/9, .0 , \
- 4.0/9, 2.0/9, .0 , \
- 6.0/9, 2.0/9, .0 , \
- 8.0/9, 2.0/9, .0 , \
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- -4.0/9, 4.0/9, .0 , \
- -2.0/9, 4.0/9, .0 , \
- .0 , 4.0/9, .0 , \
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- 4.0/9, 4.0/9, .0 , \
- 6.0/9, 4.0/9, .0 , \
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- -8.0/9, 6.0/9, .0 , \
- -6.0/9, 6.0/9, .0 , \
- -4.0/9, 6.0/9, .0 , \
- -2.0/9, 6.0/9, .0 , \
- .0 , 6.0/9, .0 , \
- 2.0/9, 6.0/9, .0 , \
- 4.0/9, 6.0/9, .0 , \
- 6.0/9, 6.0/9, .0 , \
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- .0 , 8.0/9, .0 , \
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- 4.0/9, -8.0/9, 2.0/9, \
- 6.0/9, -8.0/9, 2.0/9, \
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- -2.0/9, -6.0/9, 2.0/9, \
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- 4.0/9, -6.0/9, 2.0/9, \
- 6.0/9, -6.0/9, 2.0/9, \
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- 4.0/9, -4.0/9, 2.0/9, \
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- -4.0/9, -2.0/9, 2.0/9, \
- -2.0/9, -2.0/9, 2.0/9, \
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- 4.0/9, -2.0/9, 2.0/9, \
- 6.0/9, -2.0/9, 2.0/9, \
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- 4.0/9, 2.0/9, 2.0/9, \
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- 4.0/9, 4.0/9, 2.0/9, \
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- 4.0/9, 6.0/9, 2.0/9, \
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- -4.0/9, 8.0/9, 2.0/9, \
- -2.0/9, 8.0/9, 2.0/9, \
- .0 , 8.0/9, 2.0/9, \
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- 4.0/9, 8.0/9, 2.0/9, \
- 6.0/9, 8.0/9, 2.0/9, \
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- -4.0/9, -8.0/9, 4.0/9, \
- -2.0/9, -8.0/9, 4.0/9, \
- .0 , -8.0/9, 4.0/9, \
- 2.0/9, -8.0/9, 4.0/9, \
- 4.0/9, -8.0/9, 4.0/9, \
- 6.0/9, -8.0/9, 4.0/9, \
- 8.0/9, -8.0/9, 4.0/9, \
- -8.0/9, -6.0/9, 4.0/9, \
- -6.0/9, -6.0/9, 4.0/9, \
- -4.0/9, -6.0/9, 4.0/9, \
- -2.0/9, -6.0/9, 4.0/9, \
- .0 , -6.0/9, 4.0/9, \
- 2.0/9, -6.0/9, 4.0/9, \
- 4.0/9, -6.0/9, 4.0/9, \
- 6.0/9, -6.0/9, 4.0/9, \
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- -8.0/9, -4.0/9, 4.0/9, \
- -6.0/9, -4.0/9, 4.0/9, \
- -4.0/9, -4.0/9, 4.0/9, \
- -2.0/9, -4.0/9, 4.0/9, \
- .0 , -4.0/9, 4.0/9, \
- 2.0/9, -4.0/9, 4.0/9, \
- 4.0/9, -4.0/9, 4.0/9, \
- 6.0/9, -4.0/9, 4.0/9, \
- 8.0/9, -4.0/9, 4.0/9, \
- -8.0/9, -2.0/9, 4.0/9, \
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- -4.0/9, -2.0/9, 4.0/9, \
- -2.0/9, -2.0/9, 4.0/9, \
- .0 , -2.0/9, 4.0/9, \
- 2.0/9, -2.0/9, 4.0/9, \
- 4.0/9, -2.0/9, 4.0/9, \
- 6.0/9, -2.0/9, 4.0/9, \
- 8.0/9, -2.0/9, 4.0/9, \
- -8.0/9, .0 , 4.0/9, \
- -6.0/9, .0 , 4.0/9, \
- -4.0/9, .0 , 4.0/9, \
- -2.0/9, .0 , 4.0/9, \
- .0 , .0 , 4.0/9, \
- 2.0/9, .0 , 4.0/9, \
- 4.0/9, .0 , 4.0/9, \
- 6.0/9, .0 , 4.0/9, \
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- -4.0/9, 2.0/9, 4.0/9, \
- -2.0/9, 2.0/9, 4.0/9, \
- .0 , 2.0/9, 4.0/9, \
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- 4.0/9, 2.0/9, 4.0/9, \
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- -2.0/9, 4.0/9, 4.0/9, \
- .0 , 4.0/9, 4.0/9, \
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- 4.0/9, 4.0/9, 4.0/9, \
- 6.0/9, 4.0/9, 4.0/9, \
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- -4.0/9, 6.0/9, 4.0/9, \
- -2.0/9, 6.0/9, 4.0/9, \
- .0 , 6.0/9, 4.0/9, \
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- 4.0/9, 6.0/9, 4.0/9, \
- 6.0/9, 6.0/9, 4.0/9, \
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- -2.0/9, 8.0/9, 4.0/9, \
- .0 , 8.0/9, 4.0/9, \
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- 4.0/9, 8.0/9, 4.0/9, \
- 6.0/9, 8.0/9, 4.0/9, \
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- -2.0/9, -8.0/9, 6.0/9, \
- .0 , -8.0/9, 6.0/9, \
- 2.0/9, -8.0/9, 6.0/9, \
- 4.0/9, -8.0/9, 6.0/9, \
- 6.0/9, -8.0/9, 6.0/9, \
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- -2.0/9, -6.0/9, 6.0/9, \
- .0 , -6.0/9, 6.0/9, \
- 2.0/9, -6.0/9, 6.0/9, \
- 4.0/9, -6.0/9, 6.0/9, \
- 6.0/9, -6.0/9, 6.0/9, \
- 8.0/9, -6.0/9, 6.0/9, \
- -8.0/9, -4.0/9, 6.0/9, \
- -6.0/9, -4.0/9, 6.0/9, \
- -4.0/9, -4.0/9, 6.0/9, \
- -2.0/9, -4.0/9, 6.0/9, \
- .0 , -4.0/9, 6.0/9, \
- 2.0/9, -4.0/9, 6.0/9, \
- 4.0/9, -4.0/9, 6.0/9, \
- 6.0/9, -4.0/9, 6.0/9, \
- 8.0/9, -4.0/9, 6.0/9, \
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- -4.0/9, -2.0/9, 6.0/9, \
- -2.0/9, -2.0/9, 6.0/9, \
- .0 , -2.0/9, 6.0/9, \
- 2.0/9, -2.0/9, 6.0/9, \
- 4.0/9, -2.0/9, 6.0/9, \
- 6.0/9, -2.0/9, 6.0/9, \
- 8.0/9, -2.0/9, 6.0/9, \
- -8.0/9, .0 , 6.0/9, \
- -6.0/9, .0 , 6.0/9, \
- -4.0/9, .0 , 6.0/9, \
- -2.0/9, .0 , 6.0/9, \
- .0 , .0 , 6.0/9, \
- 2.0/9, .0 , 6.0/9, \
- 4.0/9, .0 , 6.0/9, \
- 6.0/9, .0 , 6.0/9, \
- 8.0/9, .0 , 6.0/9, \
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- -4.0/9, 2.0/9, 6.0/9, \
- -2.0/9, 2.0/9, 6.0/9, \
- .0 , 2.0/9, 6.0/9, \
- 2.0/9, 2.0/9, 6.0/9, \
- 4.0/9, 2.0/9, 6.0/9, \
- 6.0/9, 2.0/9, 6.0/9, \
- 8.0/9, 2.0/9, 6.0/9, \
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- -4.0/9, 4.0/9, 6.0/9, \
- -2.0/9, 4.0/9, 6.0/9, \
- .0 , 4.0/9, 6.0/9, \
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- 4.0/9, 4.0/9, 6.0/9, \
- 6.0/9, 4.0/9, 6.0/9, \
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- -4.0/9, 6.0/9, 6.0/9, \
- -2.0/9, 6.0/9, 6.0/9, \
- .0 , 6.0/9, 6.0/9, \
- 2.0/9, 6.0/9, 6.0/9, \
- 4.0/9, 6.0/9, 6.0/9, \
- 6.0/9, 6.0/9, 6.0/9, \
- 8.0/9, 6.0/9, 6.0/9, \
- -8.0/9, 8.0/9, 6.0/9, \
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- -4.0/9, 8.0/9, 6.0/9, \
- -2.0/9, 8.0/9, 6.0/9, \
- .0 , 8.0/9, 6.0/9, \
- 2.0/9, 8.0/9, 6.0/9, \
- 4.0/9, 8.0/9, 6.0/9, \
- 6.0/9, 8.0/9, 6.0/9, \
- 8.0/9, 8.0/9, 6.0/9, \
- -8.0/9, -8.0/9, 8.0/9, \
- -6.0/9, -8.0/9, 8.0/9, \
- -4.0/9, -8.0/9, 8.0/9, \
- -2.0/9, -8.0/9, 8.0/9, \
- .0 , -8.0/9, 8.0/9, \
- 2.0/9, -8.0/9, 8.0/9, \
- 4.0/9, -8.0/9, 8.0/9, \
- 6.0/9, -8.0/9, 8.0/9, \
- 8.0/9, -8.0/9, 8.0/9, \
- -8.0/9, -6.0/9, 8.0/9, \
- -6.0/9, -6.0/9, 8.0/9, \
- -4.0/9, -6.0/9, 8.0/9, \
- -2.0/9, -6.0/9, 8.0/9, \
- .0 , -6.0/9, 8.0/9, \
- 2.0/9, -6.0/9, 8.0/9, \
- 4.0/9, -6.0/9, 8.0/9, \
- 6.0/9, -6.0/9, 8.0/9, \
- 8.0/9, -6.0/9, 8.0/9, \
- -8.0/9, -4.0/9, 8.0/9, \
- -6.0/9, -4.0/9, 8.0/9, \
- -4.0/9, -4.0/9, 8.0/9, \
- -2.0/9, -4.0/9, 8.0/9, \
- .0 , -4.0/9, 8.0/9, \
- 2.0/9, -4.0/9, 8.0/9, \
- 4.0/9, -4.0/9, 8.0/9, \
- 6.0/9, -4.0/9, 8.0/9, \
- 8.0/9, -4.0/9, 8.0/9, \
- -8.0/9, -2.0/9, 8.0/9, \
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- -4.0/9, -2.0/9, 8.0/9, \
- -2.0/9, -2.0/9, 8.0/9, \
- .0 , -2.0/9, 8.0/9, \
- 2.0/9, -2.0/9, 8.0/9, \
- 4.0/9, -2.0/9, 8.0/9, \
- 6.0/9, -2.0/9, 8.0/9, \
- 8.0/9, -2.0/9, 8.0/9, \
- -8.0/9, .0 , 8.0/9, \
- -6.0/9, .0 , 8.0/9, \
- -4.0/9, .0 , 8.0/9, \
- -2.0/9, .0 , 8.0/9, \
- .0 , .0 , 8.0/9, \
- 2.0/9, .0 , 8.0/9, \
- 4.0/9, .0 , 8.0/9, \
- 6.0/9, .0 , 8.0/9, \
- 8.0/9, .0 , 8.0/9, \
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- -4.0/9, 2.0/9, 8.0/9, \
- -2.0/9, 2.0/9, 8.0/9, \
- .0 , 2.0/9, 8.0/9, \
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- 4.0/9, 2.0/9, 8.0/9, \
- 6.0/9, 2.0/9, 8.0/9, \
- 8.0/9, 2.0/9, 8.0/9, \
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- -4.0/9, 4.0/9, 8.0/9, \
- -2.0/9, 4.0/9, 8.0/9, \
- .0 , 4.0/9, 8.0/9, \
- 2.0/9, 4.0/9, 8.0/9, \
- 4.0/9, 4.0/9, 8.0/9, \
- 6.0/9, 4.0/9, 8.0/9, \
- 8.0/9, 4.0/9, 8.0/9, \
- -8.0/9, 6.0/9, 8.0/9, \
- -6.0/9, 6.0/9, 8.0/9, \
- -4.0/9, 6.0/9, 8.0/9, \
- -2.0/9, 6.0/9, 8.0/9, \
- .0 , 6.0/9, 8.0/9, \
- 2.0/9, 6.0/9, 8.0/9, \
- 4.0/9, 6.0/9, 8.0/9, \
- 6.0/9, 6.0/9, 8.0/9, \
- 8.0/9, 6.0/9, 8.0/9, \
- -8.0/9, 8.0/9, 8.0/9, \
- -6.0/9, 8.0/9, 8.0/9, \
- -4.0/9, 8.0/9, 8.0/9, \
- -2.0/9, 8.0/9, 8.0/9, \
- .0 , 8.0/9, 8.0/9, \
- 2.0/9, 8.0/9, 8.0/9, \
- 4.0/9, 8.0/9, 8.0/9, \
- 6.0/9, 8.0/9, 8.0/9, \
- 8.0/9, 8.0/9, 8.0/9 \
-}
-
-/*
- * Requantization tables : see ISO/IEC 11172-3 Annex B.2 and B.4
- *
- * = We store the requantization information in the following structures :
- * typedef struct requantization_s
- * {
- * byte_t i_bits_per_codeword;
- * const float * pf_ungroup;
- * float f_slope;
- * float f_offset;
- * } requantization_t;
- *
- * = Theses values depend on the bitrate per channel, on the subband number
- * and on the allocation[ch][sb] (see ISO/IEC 11172-3 2.4.2.6 and Annex B.2).
- *
- * = But, in order to avoid data redundancy, we use the following properties :
- *
- * - When bitrate_per_channel == 32 or 48 kbits/s (ie when
- * bitrate_per_channel_index == 1 or 2), the requantization values depend
- * only on allocation[ch][sb] (see ISO/IEC 11172-3 Annex B.2c and B.2d).
- * That's why ADEC_LAYER2_REQUANTIZATION_CD = f(allocation).
- *
- * - In the other cases (see ISO/IEC 11172-3 Annex B.2a and B.2b), we can
- * divide the tables in 4 subtables :
- * + ADEC_LAYER2_REQUANTIZATION_AB1 for sb in [0..2]
- * + ADEC_LAYER2_REQUANTIZATION_AB2 for sb in [3..10]
- * + ADEC_LAYER2_REQUANTIZATION_AB3 for sb in [11..22]
- * + ADEC_LAYER2_REQUANTIZATION_AB4 for sb in [23..29]
- * That's why ADEC_LAYER2_REQUANTIZATION_AB = f(sb, allocation)
- *
- * = When these tables are used, pf_ungroup3, pf_ungroup5, pf_ungroup9,
- * requantization_ab1, requantization_ab2, requantization_ab3 and
- * requantization_ab4 must already have been defined.
- */
-#define ADEC_LAYER2_REQUANTIZATION_CD \
-{ \
- { 0, NULL, .0 , .0 }, /* allocation 0 */ \
- { 5, pf_ungroup3, .0 , .0 }, /* allocation 1 */ \
- { 7, pf_ungroup5, .0 , .0 }, /* allocation 2 */ \
- {10, pf_ungroup9, .0 , .0 }, /* allocation 3 */ \
- { 4, NULL, .133333333332 , -.933333333328}, /* allocation 4 */ \
- { 5, NULL, .0645161290325 , -.967741935488}, /* allocation 5 */ \
- { 6, NULL, .0317460317459 , -.984126984124}, /* allocation 6 */ \
- { 7, NULL, .0157480314961 , -.992125984254}, /* allocation 7 */ \
- { 8, NULL, .00784313725492 , -.996078431375}, /* allocation 8 */ \
- { 9, NULL, .00391389432484 , -.998043052835}, /* allocation 9 */ \
- {10, NULL, .00195503421311 , -.999022482897}, /* allocation 10 */ \
- {11, NULL, .000977039570107 , -.99951148022 }, /* allocation 11 */ \
- {12, NULL, .000488400488398 , -.999755799752}, /* allocation 12 */ \
- {13, NULL, .000244170430962 , -.999877914789}, /* allocation 13 */ \
- {14, NULL, .000122077763535 , -.999938961117}, /* allocation 14 */ \
- {15, NULL, .000061037018952 , -.999969481491} /* allocation 15 */ \
-}
-
-#define ADEC_LAYER2_REQUANTIZATION_AB1 \
-{ \
- { 0, NULL, .0 , .0 }, /* allocation 0 */ \
- { 5, pf_ungroup3, .0 , .0 }, /* allocation 1 */ \
- { 3, NULL, .285714285715 , -.857142857145}, /* allocation 2 */ \
- { 4, NULL, .133333333332 , -.933333333328}, /* allocation 3 */ \
- { 5, NULL, .0645161290325 , -.967741935488}, /* allocation 4 */ \
- { 6, NULL, .0317460317459 , -.984126984124}, /* allocation 5 */ \
- { 7, NULL, .0157480314961 , -.992125984254}, /* allocation 6 */ \
- { 8, NULL, .00784313725492 , -.996078431375}, /* allocation 7 */ \
- { 9, NULL, .00391389432484 , -.998043052835}, /* allocation 8 */ \
- {10, NULL, .00195503421311 , -.999022482897}, /* allocation 9 */ \
- {11, NULL, .000977039570107 , -.99951148022 }, /* allocation 10 */ \
- {12, NULL, .000488400488398 , -.999755799752}, /* allocation 11 */ \
- {13, NULL, .000244170430962 , -.999877914789}, /* allocation 12 */ \
- {14, NULL, .000122077763535 , -.999938961117}, /* allocation 13 */ \
- {15, NULL, .000061037018952 , -.999969481491}, /* allocation 14 */ \
- {16, NULL, .0000305180437933, -.999984740976} /* allocation 15 */ \
-}
-
-#define ADEC_LAYER2_REQUANTIZATION_AB2 \
-{ \
- { 0, NULL, .0 , .0 }, /* allocation 0 */ \
- { 5, pf_ungroup3, .0 , .0 }, /* allocation 1 */ \
- { 7, pf_ungroup5, .0 , .0 }, /* allocation 2 */ \
- { 3, NULL, .285714285715 , -.857142857145}, /* allocation 3 */ \
- {10, pf_ungroup9, .0 , .0 }, /* allocation 4 */ \
- { 4, NULL, .133333333332 , -.933333333328}, /* allocation 5 */ \
- { 5, NULL, .0645161290325 , -.967741935488}, /* allocation 6 */ \
- { 6, NULL, .0317460317459 , -.984126984124}, /* allocation 7 */ \
- { 7, NULL, .0157480314961 , -.992125984254}, /* allocation 8 */ \
- { 8, NULL, .00784313725492 , -.996078431375}, /* allocation 9 */ \
- { 9, NULL, .00391389432484 , -.998043052835}, /* allocation 10 */ \
- {10, NULL, .00195503421311 , -.999022482897}, /* allocation 11 */ \
- {11, NULL, .000977039570107 , -.99951148022 }, /* allocation 12 */ \
- {12, NULL, .000488400488398 , -.999755799752}, /* allocation 13 */ \
- {13, NULL, .000244170430962 , -.999877914789}, /* allocation 14 */ \
- {16, NULL, .0000305180437933, -.999984740976} /* allocation 15 */ \
-}
-
-#define ADEC_LAYER2_REQUANTIZATION_AB3 \
-{ \
- { 0, NULL, .0 , .0 }, /* allocation 0 */ \
- { 5, pf_ungroup3, .0 , .0 }, /* allocation 1 */ \
- { 7, pf_ungroup5, .0 , .0 }, /* allocation 2 */ \
- { 3, NULL, .285714285715 , -.857142857145}, /* allocation 3 */ \
- {10, pf_ungroup9, .0 , .0 }, /* allocation 4 */ \
- { 4, NULL, .133333333332 , -.933333333328}, /* allocation 5 */ \
- { 5, NULL, .0645161290325 , -.967741935488}, /* allocation 6 */ \
- {16, NULL, .0000305180437933, -.999984740976}, /* allocation 7 */ \
- { 0, NULL, .0 , .0 }, /* allocation 8 */ \
- { 0, NULL, .0 , .0 }, /* allocation 9 */ \
- { 0, NULL, .0 , .0 }, /* allocation 10 */ \
- { 0, NULL, .0 , .0 }, /* allocation 11 */ \
- { 0, NULL, .0 , .0 }, /* allocation 12 */ \
- { 0, NULL, .0 , .0 }, /* allocation 13 */ \
- { 0, NULL, .0 , .0 }, /* allocation 14 */ \
- { 0, NULL, .0 , .0 } /* allocation 15 */ \
-}
-
-#define ADEC_LAYER2_REQUANTIZATION_AB4 \
-{ \
- { 0, NULL, .0 , .0 }, /* allocation 0 */ \
- { 5, pf_ungroup3, .0 , .0 }, /* allocation 1 */ \
- { 7, pf_ungroup5, .0 , .0 }, /* allocation 2 */ \
- {16, NULL, .0000305180437933, -.999984740976}, /* allocation 3 */ \
- { 0, NULL, .0 , .0 }, /* allocation 4 */ \
- { 0, NULL, .0 , .0 }, /* allocation 5 */ \
- { 0, NULL, .0 , .0 }, /* allocation 6 */ \
- { 0, NULL, .0 , .0 }, /* allocation 7 */ \
- { 0, NULL, .0 , .0 }, /* allocation 8 */ \
- { 0, NULL, .0 , .0 }, /* allocation 9 */ \
- { 0, NULL, .0 , .0 }, /* allocation 10 */ \
- { 0, NULL, .0 , .0 }, /* allocation 11 */ \
- { 0, NULL, .0 , .0 }, /* allocation 12 */ \
- { 0, NULL, .0 , .0 }, /* allocation 13 */ \
- { 0, NULL, .0 , .0 }, /* allocation 14 */ \
- { 0, NULL, .0 , .0 } /* allocation 15 */ \
-}
-
-#define ADEC_LAYER2_REQUANTIZATION_AB \
-{ \
- p_requantization_ab1, /* subband == 0 */ \
- p_requantization_ab1, /* subband == 1 */ \
- p_requantization_ab1, /* subband == 2 */ \
- p_requantization_ab2, /* subband == 3 */ \
- p_requantization_ab2, /* subband == 4 */ \
- p_requantization_ab2, /* subband == 5 */ \
- p_requantization_ab2, /* subband == 6 */ \
- p_requantization_ab2, /* subband == 7 */ \
- p_requantization_ab2, /* subband == 8 */ \
- p_requantization_ab2, /* subband == 9 */ \
- p_requantization_ab2, /* subband == 10 */ \
- p_requantization_ab3, /* subband == 11 */ \
- p_requantization_ab3, /* subband == 12 */ \
- p_requantization_ab3, /* subband == 13 */ \
- p_requantization_ab3, /* subband == 14 */ \
- p_requantization_ab3, /* subband == 15 */ \
- p_requantization_ab3, /* subband == 16 */ \
- p_requantization_ab3, /* subband == 17 */ \
- p_requantization_ab3, /* subband == 18 */ \
- p_requantization_ab3, /* subband == 19 */ \
- p_requantization_ab3, /* subband == 20 */ \
- p_requantization_ab3, /* subband == 21 */ \
- p_requantization_ab3, /* subband == 22 */ \
- p_requantization_ab4, /* subband == 23 */ \
- p_requantization_ab4, /* subband == 24 */ \
- p_requantization_ab4, /* subband == 25 */ \
- p_requantization_ab4, /* subband == 26 */ \
- p_requantization_ab4, /* subband == 27 */ \
- p_requantization_ab4, /* subband == 28 */ \
- p_requantization_ab4 /* subband == 29 */ \
-}
*/
#include "int_types.h"
-#include "audio_constants.h"
+//#include "audio_constants.h"
#include "audio_decoder.h"
#include "audio_math.h" /* DCT32(), PCM() */
#include "audio_bit_stream.h"
#define NULL ((void *)0)
-/*****************************************************************************
- * adec_Layer`L'_`M': decodes an mpeg 1, layer `L', mode `M', audio frame
- *****************************************************************************
- * These functions decode the audio frame which has already its header loaded
- * in the i_header member of the audio decoder thread structure and its first
- * byte of data described by the bit stream structure of the audio decoder
- * thread (there is no bit available in the bit buffer yet)
- *****************************************************************************/
+/**** wkn ****/
-/*****************************************************************************
- * adec_Layer1_Mono
- *****************************************************************************/
-static __inline__ int adec_Layer1_Mono (audiodec_t * p_adec)
-{
- p_adec->bit_stream.buffer = 0;
- p_adec->bit_stream.i_available = 0;
- return (0);
-}
+static float adec_scalefactor_table[64] = { /* 2 ^ (1 - i/3) */
+ 2.0000000000000000, 1.5874010519681994, 1.2599210498948732,
+ 1.0000000000000000, 0.7937005259840998, 0.6299605249474366,
+ 0.5000000000000000, 0.3968502629920499, 0.3149802624737183,
+ 0.2500000000000000, 0.1984251314960249, 0.1574901312368591,
+ 0.1250000000000000, 0.0992125657480125, 0.0787450656184296,
+ 0.0625000000000000, 0.0496062828740062, 0.0393725328092148,
+ 0.0312500000000000, 0.0248031414370031, 0.0196862664046074,
+ 0.0156250000000000, 0.0124015707185016, 0.0098431332023037,
+ 0.0078125000000000, 0.0062007853592508, 0.0049215666011518,
+ 0.0039062500000000, 0.0031003926796254, 0.0024607833005759,
+ 0.0019531250000000, 0.0015501963398127, 0.0012303916502880,
+ 0.0009765625000000, 0.0007750981699063, 0.0006151958251440,
+ 0.0004882812500000, 0.0003875490849532, 0.0003075979125720,
+ 0.0002441406250000, 0.0001937745424766, 0.0001537989562860,
+ 0.0001220703125000, 0.0000968872712383, 0.0000768994781430,
+ 0.0000610351562500, 0.0000484436356191, 0.0000384497390715,
+ 0.0000305175781250, 0.0000242218178096, 0.0000192248695357,
+ 0.0000152587890625, 0.0000121109089048, 0.0000096124347679,
+ 0.0000076293945312, 0.0000060554544524, 0.0000048062173839,
+ 0.0000038146972656, 0.0000030277272262, 0.0000024031086920,
+ 0.0000019073486328, 0.0000015138636131, 0.0000012015543460,
+ 0.0000009536743164 /* last element is not in the standard... invalid ??? */
+};
-/*****************************************************************************
- * adec_Layer1_Stereo
- *****************************************************************************/
-static __inline__ int adec_Layer1_Stereo (audiodec_t * p_adec)
-{
- p_adec->bit_stream.buffer = 0;
- p_adec->bit_stream.i_available = 0;
- return (0);
-}
+static float adec_slope_table[15] = {
+ 0.6666666666666666, 0.2857142857142857, 0.1333333333333333,
+ 0.0645161290322581, 0.0317460317460317, 0.0157480314960630,
+ 0.0078431372549020, 0.0039138943248532, 0.0019550342130987,
+ 0.0009770395701026, 0.0004884004884005, 0.0002441704309608,
+ 0.0001220777635354, 0.0000610370189520, 0.0000305180437934
+};
-/*****************************************************************************
- * adec_Layer2_Mono
- *****************************************************************************/
-static __inline__ int adec_Layer2_Mono (audiodec_t * p_adec)
-{
- p_adec->bit_stream.buffer = 0;
- p_adec->bit_stream.i_available = 0;
- return (0);
-}
+static float adec_offset_table[15] = {
+ -0.6666666666666666, -0.8571428571428571, -0.9333333333333333,
+ -0.9677419354838710, -0.9841269841269841, -0.9921259842519685,
+ -0.9960784313725490, -0.9980430528375733, -0.9990224828934506,
+ -0.9995114802149487, -0.9997557997557998, -0.9998779147845196,
+ -0.9999389611182323, -0.9999694814905240, -0.9999847409781033
+};
-/*****************************************************************************
- * adec_Layer2_Stereo
- *****************************************************************************/
-static __inline__ int adec_Layer2_Stereo (audiodec_t * p_adec, s16 * buffer)
+static u8 adec_layer1_allocation_table[15] = {
+ 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
+};
+
+static int adec_bound_table[4] = {4, 8, 12, 16};
+
+static int adec_layer1_mono (audiodec_t * p_adec, s16 * buffer)
{
- typedef struct requantization_s
- {
- u8 i_bits_per_codeword;
- const float * pf_ungroup;
- float f_slope;
- float f_offset;
- } requantization_t;
-
- static const float pf_scalefactor[64] = ADEC_SCALE_FACTOR;
-
- static u32 i_header;
- static int i_sampling_frequency, i_mode, i_bound;
- static int pi_allocation_0[32], pi_allocation_1[32]; /* see ISO/IEC 11172-3 2.4.1.6 */
- int i_sb, i_nbal;
- float f_scalefactor_0, f_scalefactor_1;
-
- static const u8 ppi_bitrate_per_channel_index[4][15] = ADEC_LAYER2_BITRATE_PER_CHANNEL_INDEX;
- static const u8 ppi_sblimit[3][11] = ADEC_LAYER2_SBLIMIT;
- static const u8 ppi_nbal[2][32] = ADEC_LAYER2_NBAL;
-
- static const float pf_ungroup3[3*3*3 * 3] = ADEC_LAYER2_UNGROUP3;
- static const float pf_ungroup5[5*5*5 * 3] = ADEC_LAYER2_UNGROUP5;
- static const float pf_ungroup9[9*9*9 * 3] = ADEC_LAYER2_UNGROUP9;
-
- static const requantization_t p_requantization_cd[16] = ADEC_LAYER2_REQUANTIZATION_CD;
- static const requantization_t p_requantization_ab1[16] = ADEC_LAYER2_REQUANTIZATION_AB1;
- static const requantization_t p_requantization_ab2[16] = ADEC_LAYER2_REQUANTIZATION_AB2;
- static const requantization_t p_requantization_ab3[16] = ADEC_LAYER2_REQUANTIZATION_AB3;
- static const requantization_t p_requantization_ab4[16] = ADEC_LAYER2_REQUANTIZATION_AB4;
- static const requantization_t * pp_requantization_ab[30] = ADEC_LAYER2_REQUANTIZATION_AB;
-
- static int i_sblimit, i_bitrate_per_channel_index;
- static int pi_scfsi_0[30], pi_scfsi_1[30];
- static const u8 * pi_nbal;
- static float ppf_sample_0[3][32], ppf_sample_1[3][32];
- static const requantization_t * pp_requantization_0[30];
- static const requantization_t * pp_requantization_1[30];
- static requantization_t requantization;
- static const float * pf_ungroup;
-
- static float pf_scalefactor_0_0[30], pf_scalefactor_0_1[30], pf_scalefactor_0_2[30];
- static float pf_scalefactor_1_0[30], pf_scalefactor_1_1[30], pf_scalefactor_1_2[30];
-
- int i_2nbal, i_gr;
- float f_dummy;
-
- s16 * p_s16;
-
- int i_need = 0, i_dump = 0;
-#if 0
- static const int pi_framesize[512] = ADEC_FRAME_SIZE;
-#endif
+ u8 allocation[32];
+ float slope[32];
+ float offset[32];
+ float sample[32];
- /* Read the audio frame header and flush the bit buffer */
- i_header = p_adec->header;
- /* Read the sampling frequency (see ISO/IEC 11172-3 2.4.2.3) */
- i_sampling_frequency = (int)((i_header & ADEC_HEADER_SAMPLING_FREQUENCY_MASK)
- >> ADEC_HEADER_SAMPLING_FREQUENCY_SHIFT);
- /* Read the mode (see ISO/IEC 11172-3 2.4.2.3) */
- i_mode = (int)((i_header & ADEC_HEADER_MODE_MASK) >> ADEC_HEADER_MODE_SHIFT);
- /* If a CRC can be found in the frame, get rid of it */
- if ((i_header & ADEC_HEADER_PROTECTION_BIT_MASK) == 0)
- {
- NeedBits (&p_adec->bit_stream, 16);
- DumpBits (&p_adec->bit_stream, 16);
+ int sb;
+ int s;
+
+ /* parse allocation */
+
+ for (sb = 0; sb < 32; sb += 2) {
+ u8 tmp;
+ tmp = GetByte (&p_adec->bit_stream);
+ if ((tmp >> 4) > 14)
+ return 1;
+ allocation[sb] = adec_layer1_allocation_table [tmp >> 4];
+ if ((tmp & 15) > 14)
+ return 1;
+ allocation[sb+1] = adec_layer1_allocation_table [tmp & 15];
}
- /* Find out the bitrate per channel index */
- i_bitrate_per_channel_index = (int)ppi_bitrate_per_channel_index[i_mode]
- [(i_header & ADEC_HEADER_BITRATE_INDEX_MASK) >> ADEC_HEADER_BITRATE_INDEX_SHIFT];
- /* Find out the number of subbands */
- i_sblimit = (int)ppi_sblimit[i_sampling_frequency][i_bitrate_per_channel_index];
- /* Check if the frame is valid or not */
- if (i_sblimit == 0)
- {
- return (0); /* the frame is invalid */
+ /* parse scalefactors */
+
+ for (sb = 0; sb < 32; sb++) {
+ if (allocation[sb]) {
+ int index;
+ float scalefactor;
+
+ NeedBits (&p_adec->bit_stream, 6);
+ index = p_adec->bit_stream.buffer >> (32 - 6);
+ DumpBits (&p_adec->bit_stream, 6);
+
+ scalefactor = adec_scalefactor_table[index];
+
+ slope[sb] = adec_slope_table[allocation[sb]-2] * scalefactor;
+ offset[sb] = adec_offset_table[allocation[sb]-2] * scalefactor;
+ }
}
- /* Find out the number of bits allocated */
- pi_nbal = ppi_nbal[ (i_bitrate_per_channel_index <= 2) ? 0 : 1 ];
-
- /* Find out the `bound' subband (see ISO/IEC 11172-3 2.4.2.3) */
- if (i_mode == 1)
- {
- i_bound = (int)(((i_header & ADEC_HEADER_MODE_EXTENSION_MASK) >> (ADEC_HEADER_MODE_EXTENSION_SHIFT - 2)) + 4);
- if (i_bound > i_sblimit)
- {
- i_bound = i_sblimit;
- }
+
+ /* parse samples */
+
+ for (s = 0; s < 12; s++) {
+ s16 * XXX_buf;
+
+ for (sb = 0; sb < 32; sb++) {
+ if (!allocation[sb]) {
+ sample[sb] = 0;
+ } else {
+ int code;
+
+ NeedBits (&p_adec->bit_stream, allocation[sb]);
+ code = p_adec->bit_stream.buffer >> (32 - allocation[sb]);
+ DumpBits (&p_adec->bit_stream, allocation[sb]);
+
+ sample[sb] = slope[sb] * code + offset[sb];
+ }
+ }
+
+ DCT32 (sample, &p_adec->bank_0);
+ XXX_buf = buffer;
+ PCM (&p_adec->bank_0, &XXX_buf, 1);
+ buffer += 32;
}
- else
- {
- i_bound = i_sblimit;
+
+ return 0;
+}
+
+static int adec_layer1_stereo (audiodec_t * p_adec, s16 * buffer)
+{
+ u8 allocation_0[32], allocation_1[32];
+ float slope_0[32], slope_1[32];
+ float offset_0[32], offset_1[32];
+ float sample_0[32], sample_1[32];
+
+ int bound;
+ int sb;
+ int s;
+
+ /* calculate bound */
+
+ bound = 32;
+ if ((p_adec->header & 0xc0) == 0x40) { /* intensity stereo */
+ int index;
+ index = (p_adec->header >> 4) & 3;
+ bound = adec_bound_table[index];
}
- /* Read the allocation information (see ISO/IEC 11172-3 2.4.1.6) */
- for (i_sb = 0; i_sb < i_bound; i_sb++)
- {
- i_2nbal = 2 * (i_nbal = (int)pi_nbal[ i_sb ]);
- NeedBits (&p_adec->bit_stream, i_2nbal);
- i_need += i_2nbal;
- pi_allocation_0[ i_sb ] = (int)(p_adec->bit_stream.buffer >> (32 - i_nbal));
- p_adec->bit_stream.buffer <<= i_nbal;
- pi_allocation_1[ i_sb ] = (int)(p_adec->bit_stream.buffer >> (32 - i_nbal));
- p_adec->bit_stream.buffer <<= i_nbal;
- p_adec->bit_stream.i_available -= i_2nbal;
- i_dump += i_2nbal;
+ /* parse allocation */
+
+ for (sb = 0; sb < bound; sb++) {
+ u8 tmp;
+ tmp = GetByte (&p_adec->bit_stream);
+ if ((tmp >> 4) > 14)
+ return 1;
+ allocation_0[sb] = adec_layer1_allocation_table [tmp >> 4];
+ if ((tmp & 15) > 14)
+ return 1;
+ allocation_1[sb] = adec_layer1_allocation_table [tmp & 15];
}
- for (; i_sb < i_sblimit; i_sb++)
- {
- i_nbal = (int)pi_nbal[ i_sb ];
- NeedBits (&p_adec->bit_stream, i_nbal);
- i_need += i_nbal;
- pi_allocation_0[ i_sb ] = (int)(p_adec->bit_stream.buffer >> (32 - i_nbal));
- DumpBits (&p_adec->bit_stream, i_nbal);
- i_dump += i_nbal;
+ for (; sb < 32; sb += 2) {
+ u8 tmp;
+ tmp = GetByte (&p_adec->bit_stream);
+ if ((tmp >> 4) > 14)
+ return 1;
+ allocation_0[sb] = allocation_1[sb] = adec_layer1_allocation_table [tmp >> 4];
+ if ((tmp & 15) > 14)
+ return 1;
+ allocation_0[sb+1] = allocation_1[sb+1] = adec_layer1_allocation_table [tmp & 15];
}
-#define MACRO(p_requantization) \
- for (i_sb = 0; i_sb < i_bound; i_sb++) \
- { \
- if (pi_allocation_0[i_sb]) \
- { \
- pp_requantization_0[i_sb] = &((p_requantization)[pi_allocation_0[i_sb]]); \
- NeedBits (&p_adec->bit_stream, 2); \
- i_need += 2; \
- pi_scfsi_0[i_sb] = (int)(p_adec->bit_stream.buffer >> (32 - 2)); \
- DumpBits (&p_adec->bit_stream, 2); \
- i_dump += 2; \
- } \
- else \
- { \
- ppf_sample_0[0][i_sb] = .0; \
- ppf_sample_0[1][i_sb] = .0; \
- ppf_sample_0[2][i_sb] = .0; \
- } \
-\
- if (pi_allocation_1[i_sb]) \
- { \
- pp_requantization_1[i_sb] = &((p_requantization)[pi_allocation_1[i_sb]]); \
- NeedBits (&p_adec->bit_stream, 2); \
- i_need += 2; \
- pi_scfsi_1[i_sb] = (int)(p_adec->bit_stream.buffer >> (32 - 2)); \
- DumpBits (&p_adec->bit_stream, 2); \
- i_dump += 2; \
- } \
- else \
- { \
- ppf_sample_1[0][i_sb] = .0; \
- ppf_sample_1[1][i_sb] = .0; \
- ppf_sample_1[2][i_sb] = .0; \
- } \
- } \
-\
- for (; i_sb < i_sblimit; i_sb++) \
- { \
- if (pi_allocation_0[i_sb]) \
- { \
- pp_requantization_0[i_sb] = &((p_requantization)[pi_allocation_0[i_sb]]); \
- NeedBits (&p_adec->bit_stream, 4); \
- i_need += 4; \
- pi_scfsi_0[i_sb] = (int)(p_adec->bit_stream.buffer >> (32 - 2)); \
- p_adec->bit_stream.buffer <<= 2; \
- pi_scfsi_1[i_sb] = (int)(p_adec->bit_stream.buffer >> (32 - 2)); \
- p_adec->bit_stream.buffer <<= 2; \
- p_adec->bit_stream.i_available -= 4; \
- i_dump += 4; \
- } \
- else \
- { \
- ppf_sample_0[0][i_sb] = .0; \
- ppf_sample_0[1][i_sb] = .0; \
- ppf_sample_0[2][i_sb] = .0; \
- ppf_sample_1[0][i_sb] = .0; \
- ppf_sample_1[1][i_sb] = .0; \
- ppf_sample_1[2][i_sb] = .0; \
- } \
- }
-/* #define MACRO */
+ /* parse scalefactors */
+
+ for (sb = 0; sb < 32; sb++) {
+ if (allocation_0[sb]) {
+ int index;
+ float scalefactor;
+
+ NeedBits (&p_adec->bit_stream, 6);
+ index = p_adec->bit_stream.buffer >> (32 - 6);
+ DumpBits (&p_adec->bit_stream, 6);
- if (i_bitrate_per_channel_index <= 2)
- {
- MACRO (p_requantization_cd)
+ scalefactor = adec_scalefactor_table[index];
+
+ slope_0[sb] = adec_slope_table[allocation_0[sb]-2] * scalefactor;
+ offset_0[sb] = adec_offset_table[allocation_0[sb]-2] * scalefactor;
+ }
+ if (allocation_1[sb]) {
+ int index;
+ float scalefactor;
+
+ NeedBits (&p_adec->bit_stream, 6);
+ index = p_adec->bit_stream.buffer >> (32 - 6);
+ DumpBits (&p_adec->bit_stream, 6);
+
+ scalefactor = adec_scalefactor_table[index];
+
+ slope_1[sb] = adec_slope_table[allocation_1[sb]-2] * scalefactor;
+ offset_1[sb] = adec_offset_table[allocation_1[sb]-2] * scalefactor;
+ }
}
- else
- {
- MACRO (pp_requantization_ab[i_sb])
+
+ /* parse samples */
+
+ for (s = 0; s < 12; s++) {
+ s16 * XXX_buf;
+
+ for (sb = 0; sb < bound; sb++) {
+ if (!allocation_0[sb])
+ sample_0[sb] = 0;
+ else {
+ int code;
+
+ NeedBits (&p_adec->bit_stream, allocation_0[sb]);
+ code = p_adec->bit_stream.buffer >> (32 - allocation_0[sb]);
+ DumpBits (&p_adec->bit_stream, allocation_0[sb]);
+
+ sample_0[sb] = slope_0[sb] * code + offset_0[sb];
+ }
+ if (!allocation_1[sb])
+ sample_1[sb] = 0;
+ else {
+ int code;
+
+ NeedBits (&p_adec->bit_stream, allocation_1[sb]);
+ code = p_adec->bit_stream.buffer >> (32 - allocation_1[sb]);
+ DumpBits (&p_adec->bit_stream, allocation_1[sb]);
+
+ sample_1[sb] = slope_1[sb] * code + offset_1[sb];
+ }
+ }
+ for (; sb < 32; sb++) {
+ if (!allocation_0[sb]) {
+ sample_0[sb] = 0;
+ sample_1[sb] = 0;
+ } else {
+ int sample;
+
+ NeedBits (&p_adec->bit_stream, allocation_0[sb]);
+ sample = p_adec->bit_stream.buffer >> (32 - allocation_0[sb]);
+ DumpBits (&p_adec->bit_stream, allocation_0[sb]);
+
+ sample_0[sb] = slope_0[sb] * sample + offset_0[sb];
+ sample_1[sb] = slope_1[sb] * sample + offset_1[sb];
+ }
+ }
+
+ DCT32 (sample_0, &p_adec->bank_0);
+ XXX_buf = buffer;
+ PCM (&p_adec->bank_0, &XXX_buf, 2);
+ DCT32 (sample_1, &p_adec->bank_1);
+ XXX_buf = buffer+1;
+ PCM (&p_adec->bank_1, &XXX_buf, 2);
+ buffer += 64;
}
-#define SWITCH(pi_scfsi,pf_scalefactor_0,pf_scalefactor_1,pf_scalefactor_2) \
- switch ((pi_scfsi)[i_sb]) \
- { \
- case 0: \
- NeedBits (&p_adec->bit_stream, (3*6)); \
- i_need += 18; \
- (pf_scalefactor_0)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- (pf_scalefactor_1)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- p_adec->bit_stream.i_available -= (3*6); \
- i_dump += 18; \
- break; \
-\
- case 1: \
- NeedBits (&p_adec->bit_stream, (2*6)); \
- i_need += 12; \
- (pf_scalefactor_0)[i_sb] = \
- (pf_scalefactor_1)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- p_adec->bit_stream.i_available -= (2*6); \
- i_dump += 12; \
- break; \
-\
- case 2: \
- NeedBits (&p_adec->bit_stream, (1*6)); \
- i_need += 6; \
- (pf_scalefactor_0)[i_sb] = \
- (pf_scalefactor_1)[i_sb] = \
- (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- DumpBits (&p_adec->bit_stream, (1*6)); \
- i_dump += 6; \
- break; \
-\
- case 3: \
- NeedBits (&p_adec->bit_stream, (2*6)); \
- i_need += 12; \
- (pf_scalefactor_0)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- (pf_scalefactor_1)[i_sb] = \
- (pf_scalefactor_2)[i_sb] = pf_scalefactor[p_adec->bit_stream.buffer >> (32 - 6)]; \
- p_adec->bit_stream.buffer <<= 6; \
- p_adec->bit_stream.i_available -= (2*6); \
- i_dump += 12; \
- break; \
+ return 0;
+}
+
+typedef struct {
+ s8 nbal[32];
+ u8 * alloc[32];
+} alloc_table_t;
+
+#define L3 -1
+#define L5 -2
+#define L9 -3
+
+static void adec_layer2_get_table (u32 header, u8 freq_table[15],
+ alloc_table_t ** alloc, int * sblimit)
+{
+ static s8 table_ab0[16] = {
+ 0, L3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
+ };
+ static s8 table_ab3[16] = {
+ 0, L3, L5, 3, L9, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16
+ };
+ static s8 table_ab11[8] = {
+ 0, L3, L5, 3, L9, 4, 5, 16
+ };
+ static s8 table_ab23[8] = {
+ 0, L3, L5, 16
+ };
+ static alloc_table_t mpeg1_ab = {
+ {4,4,4,4,4,4,4,4,4,4,4,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,0,0},
+ {table_ab0, table_ab0, table_ab0, table_ab3,
+ table_ab3, table_ab3, table_ab3, table_ab3,
+ table_ab3, table_ab3, table_ab3, table_ab11,
+ table_ab11, table_ab11, table_ab11, table_ab11,
+ table_ab11, table_ab11, table_ab11, table_ab11,
+ table_ab11, table_ab11, table_ab11, table_ab23,
+ table_ab23, table_ab23, table_ab23, table_ab23,
+ table_ab23, table_ab23, NULL, NULL}
+ };
+
+ static s8 table_cd[16] = {
+ 0, L3, L5, L9, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
+ };
+ static alloc_table_t mpeg1_cd = {
+ {4,4,3,3,3,3,3,3,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
+ {table_cd, table_cd, table_cd, table_cd,
+ table_cd, table_cd, table_cd, table_cd,
+ table_cd, table_cd, table_cd, table_cd,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}
+ };
+
+ static s8 table_0[16] = {
+ 0, L3, L5, 3, L9, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
+ };
+ static s8 table_4[8] = {
+ 0, L3, L5, L9, 4, 5, 6, 7
+ };
+ static alloc_table_t mpeg2 = {
+ {4,4,4,4,3,3,3,3,3,3,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,0,0},
+ {table_0, table_0, table_0, table_0,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, table_4, table_4,
+ table_4, table_4, NULL, NULL}
+ };
+
+ static alloc_table_t * alloc_table [4] = {
+ &mpeg2, &mpeg1_cd, &mpeg1_ab, &mpeg1_ab
+ };
+ static int sblimit_table[12] = {
+ 30, 8, 27, 30, 30, 8, 27, 27, 30, 12, 27, 30
+ };
+
+ int index;
+
+ if (!(header & 0x80000))
+ index = 0; /* mpeg2 */
+ else {
+ index = (header >> 12) & 15; /* mpeg1, bitrate */
+ index = freq_table [index];
}
-/* #define SWITCH */
-
- for (i_sb = 0; i_sb < i_bound; i_sb++)
- {
- if (pi_allocation_0[i_sb])
- {
- SWITCH (pi_scfsi_0, pf_scalefactor_0_0, pf_scalefactor_0_1, pf_scalefactor_0_2)
- }
- if (pi_allocation_1[i_sb])
- {
- SWITCH (pi_scfsi_1, pf_scalefactor_1_0, pf_scalefactor_1_1, pf_scalefactor_1_2)
- }
+
+ *alloc = alloc_table[index];
+ index |= (header >> 8) & 12;
+ *sblimit = sblimit_table[index];
+}
+
+static int adec_layer2_mono (audiodec_t * p_adec, s16 * buffer)
+{
+ return 1;
+}
+
+static int adec_layer2_stereo (audiodec_t * p_adec, s16 * buffer)
+{
+ static u8 freq_table[15] = {3, 0, 0, 0, 1, 0, 1, 2, 2, 2, 3, 3, 3, 3, 3};
+ static float L3_table[3] = {-2/3.0, 0, 2/3.0};
+ static float L5_table[5] = {-4/5.0, -2/5.0, 0, 2/5.0, 4/5.0};
+ static float L9_table[9] = {-8/9.0, -6/9.0, -4/9.0, -2/9.0, 0,
+ 2/9.0, 4/9.0, 6/9.0, 8/9.0};
+
+ s8 allocation_0[32], allocation_1[32];
+ u8 scfsi_0[32], scfsi_1[32];
+ float slope_0[3][32], slope_1[3][32];
+ float offset_0[3][32], offset_1[3][32];
+ float sample_0[3][32], sample_1[3][32];
+ alloc_table_t * alloc_table;
+
+ int sblimit;
+ int bound;
+ int sb;
+ int gr0, gr1;
+ int s;
+
+ /* get the right allocation table */
+
+ adec_layer2_get_table (p_adec->header, freq_table, &alloc_table, &sblimit);
+
+ /* calculate bound */
+
+ bound = sblimit;
+ if ((p_adec->header & 0xc0) == 0x40) { /* intensity stereo */
+ int index;
+ index = (p_adec->header >> 4) & 3;
+ if (adec_bound_table[index] < sblimit)
+ bound = adec_bound_table[index];
}
- for (; i_sb < i_sblimit; i_sb++)
- {
- if (pi_allocation_0[i_sb])
- {
- SWITCH (pi_scfsi_0, pf_scalefactor_0_0, pf_scalefactor_0_1, pf_scalefactor_0_2)
- SWITCH (pi_scfsi_1, pf_scalefactor_1_0, pf_scalefactor_1_1, pf_scalefactor_1_2)
- }
+
+ /* parse allocation */
+
+ for (sb = 0; sb < bound; sb++) {
+ int index;
+
+ NeedBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+ index = p_adec->bit_stream.buffer >> (32 - alloc_table->nbal[sb]);
+ DumpBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+
+ allocation_0[sb] = alloc_table->alloc[sb][index];
+
+ NeedBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+ index = p_adec->bit_stream.buffer >> (32 - alloc_table->nbal[sb]);
+ DumpBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+
+ allocation_1[sb] = alloc_table->alloc[sb][index];
}
- for (; i_sb < 32; i_sb++)
- {
- ppf_sample_0[0][i_sb] = .0;
- ppf_sample_0[1][i_sb] = .0;
- ppf_sample_0[2][i_sb] = .0;
- ppf_sample_1[0][i_sb] = .0;
- ppf_sample_1[1][i_sb] = .0;
- ppf_sample_1[2][i_sb] = .0;
+ for (; sb < sblimit; sb++) {
+ int index;
+
+ NeedBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+ index = p_adec->bit_stream.buffer >> (32 - alloc_table->nbal[sb]);
+ DumpBits (&p_adec->bit_stream, alloc_table->nbal[sb]);
+
+ allocation_0[sb] = allocation_1[sb] = alloc_table->alloc[sb][index];
}
-#define GROUPTEST(pp_requantization,ppf_sample,pf_sf) \
- requantization = *((pp_requantization)[i_sb]); \
- if (requantization.pf_ungroup == NULL) \
- { \
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- (ppf_sample)[0][i_sb] = (f_scalefactor_0 = (pf_sf)[i_sb]) * (requantization.f_slope * \
- (p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
-\
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- (ppf_sample)[1][i_sb] = f_scalefactor_0 * (requantization.f_slope * \
- (p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
-\
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- (ppf_sample)[2][i_sb] = f_scalefactor_0 * (requantization.f_slope * \
- (p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword)) + requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
- } \
- else \
- { \
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- pf_ungroup = requantization.pf_ungroup + 3 * \
- (p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword)); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
- (ppf_sample)[0][i_sb] = (f_scalefactor_0 = (pf_sf)[i_sb]) * pf_ungroup[0]; \
- (ppf_sample)[1][i_sb] = f_scalefactor_0 * pf_ungroup[1]; \
- (ppf_sample)[2][i_sb] = f_scalefactor_0 * pf_ungroup[2]; \
+ /* parse scfsi */
+
+ for (sb = 0; sb < sblimit; sb++) {
+ if (allocation_0[sb]) {
+ NeedBits (&p_adec->bit_stream, 2);
+ scfsi_0[sb] = p_adec->bit_stream.buffer >> (32 - 2);
+ DumpBits (&p_adec->bit_stream, 2);
+ }
+ if (allocation_1[sb]) {
+ NeedBits (&p_adec->bit_stream, 2);
+ scfsi_1[sb] = p_adec->bit_stream.buffer >> (32 - 2);
+ DumpBits (&p_adec->bit_stream, 2);
+ }
}
-/* #define GROUPTEST */
-
-#define READ_SAMPLE_L2S(pf_scalefactor_0,pf_scalefactor_1,i_grlimit) \
- for (; i_gr < (i_grlimit); i_gr++) \
- { \
- for (i_sb = 0; i_sb < i_bound; i_sb++) \
- { \
- if (pi_allocation_0[i_sb]) \
- { \
- GROUPTEST (pp_requantization_0, ppf_sample_0, (pf_scalefactor_0)) \
- } \
- if (pi_allocation_1[i_sb]) \
- { \
- GROUPTEST (pp_requantization_1, ppf_sample_1, (pf_scalefactor_1)) \
- } \
- } \
- for (; i_sb < i_sblimit; i_sb++) \
- { \
- if (pi_allocation_0[i_sb]) \
- { \
- requantization = *(pp_requantization_0[i_sb]); \
- if (requantization.pf_ungroup == NULL) \
- { \
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- ppf_sample_0[0][i_sb] = (f_scalefactor_0 = (pf_scalefactor_0)[i_sb]) * \
- (requantization.f_slope * (f_dummy = \
- (float)(p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword))) + \
- requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
- ppf_sample_1[0][i_sb] = (f_scalefactor_1 = (pf_scalefactor_1)[i_sb]) * \
- (requantization.f_slope * f_dummy + requantization.f_offset); \
-\
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- ppf_sample_0[1][i_sb] = f_scalefactor_0 * \
- (requantization.f_slope * (f_dummy = \
- (float)(p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword))) + \
- requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
- ppf_sample_1[1][i_sb] = f_scalefactor_1 * \
- (requantization.f_slope * f_dummy + requantization.f_offset); \
-\
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- ppf_sample_0[2][i_sb] = f_scalefactor_0 * \
- (requantization.f_slope * (f_dummy = \
- (float)(p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword))) + \
- requantization.f_offset); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
- ppf_sample_1[2][i_sb] = f_scalefactor_1 * \
- (requantization.f_slope * f_dummy + requantization.f_offset); \
- } \
- else \
- { \
- NeedBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_need += requantization.i_bits_per_codeword; \
- pf_ungroup = requantization.pf_ungroup + 3 * \
- (p_adec->bit_stream.buffer >> (32 - requantization.i_bits_per_codeword)); \
- DumpBits (&p_adec->bit_stream, requantization.i_bits_per_codeword); \
- i_dump += requantization.i_bits_per_codeword; \
-\
- ppf_sample_0[0][i_sb] = (f_scalefactor_0 = (pf_scalefactor_0)[i_sb]) * pf_ungroup[0]; \
- ppf_sample_0[1][i_sb] = f_scalefactor_0 * pf_ungroup[1]; \
- ppf_sample_0[2][i_sb] = f_scalefactor_0 * pf_ungroup[2]; \
-\
- ppf_sample_1[0][i_sb] = (f_scalefactor_1 = (pf_scalefactor_1)[i_sb]) * pf_ungroup[0]; \
- ppf_sample_1[1][i_sb] = f_scalefactor_1 * pf_ungroup[1]; \
- ppf_sample_1[2][i_sb] = f_scalefactor_1 * pf_ungroup[2]; \
- } \
- } \
- } \
-\
- DCT32 (ppf_sample_0[0], &p_adec->bank_0); \
- PCM (&p_adec->bank_0, &p_s16, 2); \
- p_s16 -= 63; \
-\
- DCT32 (ppf_sample_1[0], &p_adec->bank_1); \
- PCM (&p_adec->bank_1, &p_s16, 2); \
- p_s16 -= 1; \
-\
- DCT32 (ppf_sample_0[1], &p_adec->bank_0); \
- PCM (&p_adec->bank_0, &p_s16, 2); \
- p_s16 -= 63; \
-\
- DCT32 (ppf_sample_1[1], &p_adec->bank_1); \
- PCM (&p_adec->bank_1, &p_s16, 2); \
- p_s16 -= 1; \
-\
- DCT32 (ppf_sample_0[2], &p_adec->bank_0); \
- PCM (&p_adec->bank_0, &p_s16, 2); \
- p_s16 -= 63; \
-\
- DCT32 (ppf_sample_1[2], &p_adec->bank_1); \
- PCM (&p_adec->bank_1, &p_s16, 2); \
- p_s16 -= 1; \
+
+ /* parse scalefactors */
+
+ for (sb = 0; sb < sblimit; sb++) {
+ if (allocation_0[sb]) {
+ int index_0, index_1, index_2;
+
+ switch (scfsi_0[sb]) {
+ case 0:
+ NeedBits (&p_adec->bit_stream, 18);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ index_2 = (p_adec->bit_stream.buffer >> (32 - 18)) & 63;
+ DumpBits (&p_adec->bit_stream, 18);
+
+ if (allocation_0[sb] < 0) {
+ slope_0[0][sb] = adec_scalefactor_table[index_0];
+ slope_0[1][sb] = adec_scalefactor_table[index_1];
+ slope_0[2][sb] = adec_scalefactor_table[index_2];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_0[sb]-2];
+ offset = adec_offset_table[allocation_0[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_0[0][sb] = slope * scalefactor;
+ offset_0[0][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_0[1][sb] = slope * scalefactor;
+ offset_0[1][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_2];
+ slope_0[2][sb] = slope * scalefactor;
+ offset_0[2][sb] = offset * scalefactor;
+ }
+ break;
+ case 1:
+ NeedBits (&p_adec->bit_stream, 12);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ DumpBits (&p_adec->bit_stream, 12);
+
+ if (allocation_0[sb] < 0) {
+ slope_0[0][sb] = slope_0[1][sb] =
+ adec_scalefactor_table[index_0];
+ slope_0[2][sb] = adec_scalefactor_table[index_1];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_0[sb]-2];
+ offset = adec_offset_table[allocation_0[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_0[0][sb] = slope_0[1][sb] = slope * scalefactor;
+ offset_0[0][sb] = offset_0[1][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_0[2][sb] = slope * scalefactor;
+ offset_0[2][sb] = offset * scalefactor;
+ }
+ break;
+ case 2:
+ NeedBits (&p_adec->bit_stream, 6);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ DumpBits (&p_adec->bit_stream, 6);
+
+ if (allocation_0[sb] < 0) {
+ slope_0[0][sb] = slope_0[1][sb] = slope_0[2][sb] =
+ adec_scalefactor_table[index_0];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_0[sb]-2];
+ offset = adec_offset_table[allocation_0[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_0[0][sb] = slope_0[1][sb] = slope_0[2][sb] =
+ slope * scalefactor;
+ offset_0[0][sb] = offset_0[1][sb] = offset_0[2][sb] =
+ offset * scalefactor;
+ }
+ break;
+ case 3:
+ NeedBits (&p_adec->bit_stream, 12);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ DumpBits (&p_adec->bit_stream, 12);
+
+ if (allocation_0[sb] < 0) {
+ slope_0[0][sb] = adec_scalefactor_table[index_0];
+ slope_0[1][sb] = slope_0[2][sb] =
+ adec_scalefactor_table[index_1];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_0[sb]-2];
+ offset = adec_offset_table[allocation_0[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_0[0][sb] = slope * scalefactor;
+ offset_0[0][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_0[1][sb] = slope_0[2][sb] = slope * scalefactor;
+ offset_0[1][sb] = offset_0[2][sb] = offset * scalefactor;
+ }
+ break;
+ }
+ }
+ if (allocation_1[sb]) {
+ int index_0, index_1, index_2;
+
+ switch (scfsi_1[sb]) {
+ case 0:
+ NeedBits (&p_adec->bit_stream, 18);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ index_2 = (p_adec->bit_stream.buffer >> (32 - 18)) & 63;
+ DumpBits (&p_adec->bit_stream, 18);
+
+ if (allocation_1[sb] < 0) {
+ slope_1[0][sb] = adec_scalefactor_table[index_0];
+ slope_1[1][sb] = adec_scalefactor_table[index_1];
+ slope_1[2][sb] = adec_scalefactor_table[index_2];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_1[sb]-2];
+ offset = adec_offset_table[allocation_1[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_1[0][sb] = slope * scalefactor;
+ offset_1[0][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_1[1][sb] = slope * scalefactor;
+ offset_1[1][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_2];
+ slope_1[2][sb] = slope * scalefactor;
+ offset_1[2][sb] = offset * scalefactor;
+ }
+ break;
+ case 1:
+ NeedBits (&p_adec->bit_stream, 12);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ DumpBits (&p_adec->bit_stream, 12);
+
+ if (allocation_1[sb] < 0) {
+ slope_1[0][sb] = slope_1[1][sb] =
+ adec_scalefactor_table[index_0];
+ slope_1[2][sb] = adec_scalefactor_table[index_1];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_1[sb]-2];
+ offset = adec_offset_table[allocation_1[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_1[0][sb] = slope_1[1][sb] = slope * scalefactor;
+ offset_1[0][sb] = offset_1[1][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_1[2][sb] = slope * scalefactor;
+ offset_1[2][sb] = offset * scalefactor;
+ }
+ break;
+ case 2:
+ NeedBits (&p_adec->bit_stream, 6);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ DumpBits (&p_adec->bit_stream, 6);
+
+ if (allocation_1[sb] < 0) {
+ slope_1[0][sb] = slope_1[1][sb] = slope_1[2][sb] =
+ adec_scalefactor_table[index_0];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_1[sb]-2];
+ offset = adec_offset_table[allocation_1[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_1[0][sb] = slope_1[1][sb] = slope_1[2][sb] =
+ slope * scalefactor;
+ offset_1[0][sb] = offset_1[1][sb] = offset_1[2][sb] =
+ offset * scalefactor;
+ }
+ break;
+ case 3:
+ NeedBits (&p_adec->bit_stream, 12);
+ index_0 = p_adec->bit_stream.buffer >> (32 - 6);
+ index_1 = (p_adec->bit_stream.buffer >> (32 - 12)) & 63;
+ DumpBits (&p_adec->bit_stream, 12);
+
+ if (allocation_1[sb] < 0) {
+ slope_1[0][sb] = adec_scalefactor_table[index_0];
+ slope_1[1][sb] = slope_1[2][sb] =
+ adec_scalefactor_table[index_1];
+ } else {
+ float scalefactor;
+ float slope, offset;
+
+ slope = adec_slope_table[allocation_1[sb]-2];
+ offset = adec_offset_table[allocation_1[sb]-2];
+
+ scalefactor = adec_scalefactor_table[index_0];
+ slope_1[0][sb] = slope * scalefactor;
+ offset_1[0][sb] = offset * scalefactor;
+
+ scalefactor = adec_scalefactor_table[index_1];
+ slope_1[1][sb] = slope_1[2][sb] = slope * scalefactor;
+ offset_1[1][sb] = offset_1[2][sb] = offset * scalefactor;
+ }
+ break;
+ }
+ }
}
-/* #define READ_SAMPLE_L2S */
- i_gr = 0;
- p_s16 = buffer;
+ /* parse samples */
- READ_SAMPLE_L2S (pf_scalefactor_0_0, pf_scalefactor_1_0, 4)
- READ_SAMPLE_L2S (pf_scalefactor_0_1, pf_scalefactor_1_1, 8)
- READ_SAMPLE_L2S (pf_scalefactor_0_2, pf_scalefactor_1_2, 12)
+ for (gr0 = 0; gr0 < 3; gr0++)
+ for (gr1 = 0; gr1 < 4; gr1++) {
+ s16 * XXX_buf;
- p_adec->bit_stream.buffer = 0;
- p_adec->bit_stream.i_available = 0;
- return (6);
-}
+ for (sb = 0; sb < bound; sb++) {
+ int code;
-/**** wkn ****/
+ switch (allocation_0[sb]) {
+ case 0:
+ sample_0[0][sb] = sample_0[1][sb] = sample_0[2][sb] = 0;
+ break;
+ case L3:
+ NeedBits (&p_adec->bit_stream, 5);
+ code = p_adec->bit_stream.buffer >> (32 - 5);
+ DumpBits (&p_adec->bit_stream, 5);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_0[1][sb] = slope_0[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_0[2][sb] = slope_0[gr0][sb] * L3_table[code];
+
+ break;
+ case L5:
+ NeedBits (&p_adec->bit_stream, 7);
+ code = p_adec->bit_stream.buffer >> (32 - 7);
+ DumpBits (&p_adec->bit_stream, 7);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_0[1][sb] = slope_0[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_0[2][sb] = slope_0[gr0][sb] * L5_table[code];
+
+ break;
+ case L9:
+ NeedBits (&p_adec->bit_stream, 10);
+ code = p_adec->bit_stream.buffer >> (32 - 10);
+ DumpBits (&p_adec->bit_stream, 10);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_0[1][sb] = slope_0[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_0[2][sb] = slope_0[gr0][sb] * L9_table[code];
+
+ break;
+ default:
+ for (s = 0; s < 3; s++) {
+ NeedBits (&p_adec->bit_stream, allocation_0[sb]);
+ code = (p_adec->bit_stream.buffer >>
+ (32 - allocation_0[sb]));
+ DumpBits (&p_adec->bit_stream, allocation_0[sb]);
+
+ sample_0[s][sb] =
+ slope_0[gr0][sb] * code + offset_0[gr0][sb];
+ }
+ }
+ switch (allocation_1[sb]) {
+ case 0:
+ sample_1[0][sb] = sample_1[1][sb] = sample_1[2][sb] = 0;
+ break;
+ case L3:
+ NeedBits (&p_adec->bit_stream, 5);
+ code = p_adec->bit_stream.buffer >> (32 - 5);
+ DumpBits (&p_adec->bit_stream, 5);
+
+ sample_1[0][sb] = slope_1[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_1[1][sb] = slope_1[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_1[2][sb] = slope_1[gr0][sb] * L3_table[code];
+
+ break;
+ case L5:
+ NeedBits (&p_adec->bit_stream, 7);
+ code = p_adec->bit_stream.buffer >> (32 - 7);
+ DumpBits (&p_adec->bit_stream, 7);
+
+ sample_1[0][sb] = slope_1[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_1[1][sb] = slope_1[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_1[2][sb] = slope_1[gr0][sb] * L5_table[code];
+
+ break;
+ case L9:
+ NeedBits (&p_adec->bit_stream, 10);
+ code = p_adec->bit_stream.buffer >> (32 - 10);
+ DumpBits (&p_adec->bit_stream, 10);
+
+ sample_1[0][sb] = slope_1[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_1[1][sb] = slope_1[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_1[2][sb] = slope_1[gr0][sb] * L9_table[code];
+
+ break;
+ default:
+ for (s = 0; s < 3; s++) {
+ NeedBits (&p_adec->bit_stream, allocation_1[sb]);
+ code = (p_adec->bit_stream.buffer >>
+ (32 - allocation_1[sb]));
+ DumpBits (&p_adec->bit_stream, allocation_1[sb]);
+
+ sample_1[s][sb] =
+ slope_1[gr0][sb] * code + offset_1[gr0][sb];
+ }
+ }
+ }
+ for (; sb < sblimit; sb++) {
+ int code;
+
+ switch (allocation_0[sb]) {
+ case 0:
+ sample_0[0][sb] = sample_0[1][sb] = sample_0[2][sb] = 0;
+ sample_1[0][sb] = sample_1[1][sb] = sample_1[2][sb] = 0;
+ break;
+ case L3:
+ NeedBits (&p_adec->bit_stream, 5);
+ code = p_adec->bit_stream.buffer >> (32 - 5);
+ DumpBits (&p_adec->bit_stream, 5);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L3_table[code % 3];
+ sample_1[0][sb] = slope_1[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_0[1][sb] = slope_0[gr0][sb] * L3_table[code % 3];
+ sample_1[1][sb] = slope_1[gr0][sb] * L3_table[code % 3];
+ code /= 3;
+ sample_0[2][sb] = slope_0[gr0][sb] * L3_table[code];
+ sample_1[2][sb] = slope_1[gr0][sb] * L3_table[code];
+
+ break;
+ case L5:
+ NeedBits (&p_adec->bit_stream, 7);
+ code = p_adec->bit_stream.buffer >> (32 - 7);
+ DumpBits (&p_adec->bit_stream, 7);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L5_table[code % 5];
+ sample_1[0][sb] = slope_1[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_0[1][sb] = slope_0[gr0][sb] * L5_table[code % 5];
+ sample_1[1][sb] = slope_1[gr0][sb] * L5_table[code % 5];
+ code /= 5;
+ sample_0[2][sb] = slope_0[gr0][sb] * L5_table[code];
+ sample_1[2][sb] = slope_1[gr0][sb] * L5_table[code];
+
+ break;
+ case L9:
+ NeedBits (&p_adec->bit_stream, 10);
+ code = p_adec->bit_stream.buffer >> (32 - 10);
+ DumpBits (&p_adec->bit_stream, 10);
+
+ sample_0[0][sb] = slope_0[gr0][sb] * L9_table[code % 9];
+ sample_1[0][sb] = slope_1[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_0[1][sb] = slope_0[gr0][sb] * L9_table[code % 9];
+ sample_1[1][sb] = slope_1[gr0][sb] * L9_table[code % 9];
+ code /= 9;
+ sample_0[2][sb] = slope_0[gr0][sb] * L9_table[code];
+ sample_1[2][sb] = slope_1[gr0][sb] * L9_table[code];
+
+ break;
+ default:
+ for (s = 0; s < 3; s++) {
+ NeedBits (&p_adec->bit_stream, allocation_0[sb]);
+ code = (p_adec->bit_stream.buffer >>
+ (32 - allocation_0[sb]));
+ DumpBits (&p_adec->bit_stream, allocation_0[sb]);
+
+ sample_0[s][sb] =
+ slope_0[gr0][sb] * code + offset_0[gr0][sb];
+ sample_1[s][sb] =
+ slope_1[gr0][sb] * code + offset_1[gr0][sb];
+ }
+ }
+ }
+ for (; sb < 32; sb++) {
+ sample_0[0][sb] = sample_0[1][sb] = sample_0[2][sb] = 0;
+ sample_1[0][sb] = sample_1[1][sb] = sample_1[2][sb] = 0;
+ }
+ for (s = 0; s < 3; s++) {
+ DCT32 (sample_0[s], &p_adec->bank_0);
+ XXX_buf = buffer;
+ PCM (&p_adec->bank_0, &XXX_buf, 2);
+ DCT32 (sample_1[s], &p_adec->bank_1);
+ XXX_buf = buffer+1;
+ PCM (&p_adec->bank_1, &XXX_buf, 2);
+ buffer += 64;
+ }
+ }
+
+ return 0;
+}
int adec_init (audiodec_t * p_adec)
{
static int mpeg2_layer2_bit_rate[15] = {
0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160
};
+ static int * bit_rate_table[8] = {
+ NULL, NULL, mpeg2_layer2_bit_rate, mpeg2_layer1_bit_rate,
+ NULL, NULL, mpeg1_layer2_bit_rate, mpeg1_layer1_bit_rate
+ };
+
u32 header;
int index;
- int * bit_rate_table;
+ int * bit_rates;
int sample_rate;
int bit_rate;
int frame_size;
p_adec->bit_stream.total_bytes_read = 0;
+
header = GetByte (&p_adec->bit_stream) << 24;
header |= GetByte (&p_adec->bit_stream) << 16;
header |= GetByte (&p_adec->bit_stream) << 8;
header |= GetByte (&p_adec->bit_stream);
-
p_adec->header = header;
/* basic header check : sync word, no emphasis */
if ((header & 0xfff00003) != 0xfff00000)
return 1;
- index = (header >> 10) & 3; /* sample rate index */
- if (index > 2)
- return 1;
- sample_rate = mpeg1_sample_rate[index];
+ /* calculate bit rate */
- switch ((header >> 17) & 7) {
- case 2: /* mpeg 2, layer 2 */
- sample_rate >>= 1; /* half sample rate for mpeg2 */
- bit_rate_table = mpeg2_layer2_bit_rate;
- break;
- case 3: /* mpeg 2, layer 1 */
- sample_rate >>= 1; /* half sample rate for mpeg2 */
- bit_rate_table = mpeg2_layer1_bit_rate;
- break;
- case 6: /* mpeg1, layer 2 */
- bit_rate_table = mpeg1_layer2_bit_rate;
- break;
- case 7: /* mpeg1, layer 1 */
- bit_rate_table = mpeg1_layer1_bit_rate;
- break;
- default: /* invalid layer */
- return 1;
- }
+ index = (header >> 17) & 7; /* mpeg ID + layer */
+ bit_rates = bit_rate_table[index];
+ if (bit_rate_table == NULL)
+ return 1; /* invalid layer */
index = (header >> 12) & 15; /* bit rate index */
if (index > 14)
return 1;
- bit_rate = bit_rate_table[index];
+ bit_rate = bit_rates[index];
- p_sync_info->sample_rate = sample_rate;
- p_sync_info->bit_rate = bit_rate;
+ /* mpeg 1 layer 2 : check that bitrate per channel is valid */
+
+ if (bit_rates == mpeg1_layer2_bit_rate) {
+ if ((header & 0xc0) == 0xc0) { /* mono */
+ if (index > 10)
+ return 1; /* invalid bitrate per channel */
+ } else { /* stereo */
+ if ((1 << index) & 0x2e)
+ return 1; /* invalid bitrate per channel */
+ }
+ }
+
+ /* calculate sample rate */
+
+ index = (header >> 10) & 3; /* sample rate index */
+ if (index > 2)
+ return 1;
+ sample_rate = mpeg1_sample_rate[index];
+ if (!(header & 0x80000))
+ sample_rate >>= 1; /* half sample rate for mpeg2 */
+
+ /* calculate frame length */
if ((header & 0x60000) == 0x60000) { /* layer 1 */
frame_size = 48000 * bit_rate / sample_rate;
frame_size ++;
}
+ p_sync_info->sample_rate = sample_rate;
+ p_sync_info->bit_rate = bit_rate;
p_sync_info->frame_size = frame_size;
p_adec->frame_size = frame_size;
int adec_decode_frame (audiodec_t * p_adec, s16 * buffer)
{
+ if (!(p_adec->header & 0x10000)) { /* error check, skip it */
+ GetByte (&p_adec->bit_stream);
+ GetByte (&p_adec->bit_stream);
+ }
+
+ /* parse audio data */
+
p_adec->bit_stream.i_available = 0;
- adec_Layer2_Stereo (p_adec, buffer);
+ switch ((p_adec->header >> 17) & 3) {
+ case 2: /* layer 2 */
+ if ((p_adec->header & 0xc0) == 0xc0) {
+ if (adec_layer2_mono (p_adec, buffer))
+ return 1;
+ } else {
+ if (adec_layer2_stereo (p_adec, buffer))
+ return 1;
+ }
+ break;
+ case 3: /* layer 1 */
+ if ((p_adec->header & 0xc0) == 0xc0) {
+ if (adec_layer1_mono (p_adec, buffer))
+ return 1;
+ } else {
+ if (adec_layer1_stereo (p_adec, buffer))
+ return 1;
+ }
+ break;
+ }
+
+ /* skip ancillary data */
+
+ if ((p_adec->header & 0xf000) == 0) /* free bitrate format */
+ return 0;
+
+ /* XXX rewrite the byte counting system to reduce overhead */
+
+#if 0
+ printf ("skip %d\n",
+ p_adec->frame_size - p_adec->bit_stream.total_bytes_read);
+#endif
if (p_adec->bit_stream.total_bytes_read > p_adec->frame_size)
- return 1;
+ return 1; /* overrun */
while (p_adec->bit_stream.total_bytes_read < p_adec->frame_size)
- GetByte (&p_adec->bit_stream);
+ GetByte (&p_adec->bit_stream); /* skip ancillary data */
return 0;
}
projects / vlc / commitdiff