aptx.c File Reference

#include "aptx.h"
#include "mathops.h"

Go to the source code of this file.

Functions
static av_always_inline void	aptx_update_codeword_history (Channel *channel)
void	ff_aptx_generate_dither (Channel *channel)
static void	aptx_invert_quantization (InvertQuantize *invert_quantize, int32_t quantized_sample, int32_t dither, ConstTables *tables)
static int32_t *	aptx_reconstructed_differences_update (Prediction *prediction, int32_t reconstructed_difference, int order)
static void	aptx_prediction_filtering (Prediction *prediction, int32_t reconstructed_difference, int order)
static void	aptx_process_subband (InvertQuantize *invert_quantize, Prediction *prediction, int32_t quantized_sample, int32_t dither, ConstTables *tables)
void	ff_aptx_invert_quantize_and_prediction (Channel *channel, int hd)
av_cold int	ff_aptx_init (AVCodecContext *avctx)

Variables
static const int32_t	quantize_intervals_LF [65]
static const int32_t	invert_quantize_dither_factors_LF [65]
static const int32_t	quantize_dither_factors_LF [65]
static const int16_t	quantize_factor_select_offset_LF [65]
static const int32_t	quantize_intervals_MLF [9]
static const int32_t	invert_quantize_dither_factors_MLF [9]
static const int32_t	quantize_dither_factors_MLF [9]
static const int16_t	quantize_factor_select_offset_MLF [9]
static const int32_t	quantize_intervals_MHF [3]
static const int32_t	invert_quantize_dither_factors_MHF [3]
static const int32_t	quantize_dither_factors_MHF [3]
static const int16_t	quantize_factor_select_offset_MHF [3]
static const int32_t	quantize_intervals_HF [5]
static const int32_t	invert_quantize_dither_factors_HF [5]
static const int32_t	quantize_dither_factors_HF [5]
static const int16_t	quantize_factor_select_offset_HF [5]
static const int32_t	hd_quantize_intervals_LF [257]
static const int32_t	hd_invert_quantize_dither_factors_LF [257]
static const int32_t	hd_quantize_dither_factors_LF [256]
static const int16_t	hd_quantize_factor_select_offset_LF [257]
static const int32_t	hd_quantize_intervals_MLF [33]
static const int32_t	hd_invert_quantize_dither_factors_MLF [33]
static const int32_t	hd_quantize_dither_factors_MLF [32]
static const int16_t	hd_quantize_factor_select_offset_MLF [33]
static const int32_t	hd_quantize_intervals_MHF [9]
static const int32_t	hd_invert_quantize_dither_factors_MHF [9]
static const int32_t	hd_quantize_dither_factors_MHF [8]
static const int16_t	hd_quantize_factor_select_offset_MHF [9]
static const int32_t	hd_quantize_intervals_HF [17]
static const int32_t	hd_invert_quantize_dither_factors_HF [17]
static const int32_t	hd_quantize_dither_factors_HF [16]
static const int16_t	hd_quantize_factor_select_offset_HF [17]
ConstTables	ff_aptx_quant_tables [2][NB_SUBBANDS]
static const int16_t	quantization_factors [32]

Function Documentation

aptx_update_codeword_history()

static av_always_inline void aptx_update_codeword_history ( Channel *  channel )

static

Definition at line 377 of file aptx.c.

Referenced by ff_aptx_generate_dither().

ff_aptx_generate_dither()

void ff_aptx_generate_dither

(

Channel *

channel

)

Definition at line 385 of file aptx.c.

Referenced by aptx_decode_samples(), and aptx_encode_channel().

aptx_invert_quantization()

static void aptx_invert_quantization ( InvertQuantize *  invert_quantize, int32_t  quantized_sample, int32_t  dither, ConstTables *  tables  )

static

Definition at line 400 of file aptx.c.

Referenced by aptx_process_subband().

aptx_reconstructed_differences_update()

static int32_t* aptx_reconstructed_differences_update ( Prediction *  prediction, int32_t  reconstructed_difference, int  order  )

static

Definition at line 425 of file aptx.c.

Referenced by aptx_prediction_filtering().

aptx_prediction_filtering()

static void aptx_prediction_filtering ( Prediction *  prediction, int32_t  reconstructed_difference, int  order  )

static

Definition at line 438 of file aptx.c.

Referenced by aptx_process_subband().

aptx_process_subband()

static void aptx_process_subband ( InvertQuantize *  invert_quantize, Prediction *  prediction, int32_t  quantized_sample, int32_t  dither, ConstTables *  tables  )

static

Definition at line 464 of file aptx.c.

Referenced by ff_aptx_invert_quantize_and_prediction().

ff_aptx_invert_quantize_and_prediction()

void ff_aptx_invert_quantize_and_prediction	(	Channel *	channel,
		int	hd
	)

Definition at line 497 of file aptx.c.

Referenced by aptx_decode_samples(), and aptx_encode_samples().

ff_aptx_init()

av_cold int ff_aptx_init

(

AVCodecContext *

avctx

)

Definition at line 508 of file aptx.c.

Referenced by aptx_encode_init().

Variable Documentation

quantize_intervals_LF

const int32_t quantize_intervals_LF[65]

static

Initial value:

= {
      -9948,    9948,   29860,   49808,   69822,   89926,  110144,  130502,
     151026,  171738,  192666,  213832,  235264,  256982,  279014,  301384,
     324118,  347244,  370790,  394782,  419250,  444226,  469742,  495832,
     522536,  549890,  577936,  606720,  636290,  666700,  698006,  730270,
     763562,  797958,  833538,  870398,  908640,  948376,  989740, 1032874,
    1077948, 1125150, 1174700, 1226850, 1281900, 1340196, 1402156, 1468282,
    1539182, 1615610, 1698514, 1789098, 1888944, 2000168, 2125700, 2269750,
    2438670, 2642660, 2899462, 3243240, 3746078, 4535138, 5664098, 7102424,
    8897462,
}

Definition at line 27 of file aptx.c.

invert_quantize_dither_factors_LF

const int32_t invert_quantize_dither_factors_LF[65]

static

Initial value:

= {
       9948,   9948,   9962,   9988,  10026,  10078,  10142,  10218,
      10306,  10408,  10520,  10646,  10784,  10934,  11098,  11274,
      11462,  11664,  11880,  12112,  12358,  12618,  12898,  13194,
      13510,  13844,  14202,  14582,  14988,  15422,  15884,  16380,
      16912,  17484,  18098,  18762,  19480,  20258,  21106,  22030,
      23044,  24158,  25390,  26760,  28290,  30008,  31954,  34172,
      36728,  39700,  43202,  47382,  52462,  58762,  66770,  77280,
      91642, 112348, 144452, 199326, 303512, 485546, 643414, 794914,
    1000124,
}

Definition at line 38 of file aptx.c.

quantize_dither_factors_LF

const int32_t quantize_dither_factors_LF[65]

static

Initial value:

= {
        0,     4,     7,    10,    13,    16,    19,    22,
       26,    28,    32,    35,    38,    41,    44,    47,
       51,    54,    58,    62,    65,    70,    74,    79,
       84,    90,    95,   102,   109,   116,   124,   133,
      143,   154,   166,   180,   195,   212,   231,   254,
      279,   308,   343,   383,   430,   487,   555,   639,
      743,   876,  1045,  1270,  1575,  2002,  2628,  3591,
     5177,  8026, 13719, 26047, 45509, 39467, 37875, 51303,
        0,
}

Definition at line 49 of file aptx.c.

quantize_factor_select_offset_LF

const int16_t quantize_factor_select_offset_LF[65]

static

Initial value:

= {
      0, -21, -19, -17, -15, -12, -10,  -8,
     -6,  -4,  -1,   1,   3,   6,   8,  10,
     13,  15,  18,  20,  23,  26,  29,  31,
     34,  37,  40,  43,  47,  50,  53,  57,
     60,  64,  68,  72,  76,  80,  85,  89,
     94,  99, 105, 110, 116, 123, 129, 136,
    144, 152, 161, 171, 182, 194, 207, 223,
    241, 263, 291, 328, 382, 467, 522, 522,
    522,
}

Definition at line 60 of file aptx.c.

quantize_intervals_MLF

const int32_t quantize_intervals_MLF[9]

static

Initial value:

= {
    -89806, 89806, 278502, 494338, 759442, 1113112, 1652322, 2720256, 5190186,
}

Definition at line 73 of file aptx.c.

invert_quantize_dither_factors_MLF

const int32_t invert_quantize_dither_factors_MLF[9]

static

Initial value:

= {
    89806, 89806, 98890, 116946, 148158, 205512, 333698, 734236, 1735696,
}

Definition at line 76 of file aptx.c.

quantize_dither_factors_MLF

const int32_t quantize_dither_factors_MLF[9]

static

Initial value:

= {
    0, 2271, 4514, 7803, 14339, 32047, 100135, 250365, 0,
}

Definition at line 79 of file aptx.c.

quantize_factor_select_offset_MLF

const int16_t quantize_factor_select_offset_MLF[9]

static

Initial value:

= {
    0, -14, 6, 29, 58, 96, 154, 270, 521,
}

Definition at line 82 of file aptx.c.

quantize_intervals_MHF

const int32_t quantize_intervals_MHF[3]

static

Initial value:

= {
    -194080, 194080, 890562,
}

Definition at line 87 of file aptx.c.

invert_quantize_dither_factors_MHF

const int32_t invert_quantize_dither_factors_MHF[3]

static

Initial value:

= {
    194080, 194080, 502402,
}

Definition at line 90 of file aptx.c.

quantize_dither_factors_MHF

const int32_t quantize_dither_factors_MHF[3]

static

Initial value:

= {
    0, 77081, 0,
}

Definition at line 93 of file aptx.c.

quantize_factor_select_offset_MHF

const int16_t quantize_factor_select_offset_MHF[3]

static

Initial value:

= {
    0, -33, 136,
}

Definition at line 96 of file aptx.c.

quantize_intervals_HF

const int32_t quantize_intervals_HF[5]

static

Initial value:

= {
    -163006, 163006, 542708, 1120554, 2669238,
}

Definition at line 101 of file aptx.c.

invert_quantize_dither_factors_HF

const int32_t invert_quantize_dither_factors_HF[5]

static

Initial value:

= {
    163006, 163006, 216698, 361148, 1187538,
}

Definition at line 104 of file aptx.c.

quantize_dither_factors_HF

const int32_t quantize_dither_factors_HF[5]

static

Initial value:

= {
    0, 13423, 36113, 206598, 0,
}

Definition at line 107 of file aptx.c.

quantize_factor_select_offset_HF

const int16_t quantize_factor_select_offset_HF[5]

static

Initial value:

= {
    0, -8, 33, 95, 262,
}

Definition at line 110 of file aptx.c.

hd_quantize_intervals_LF

const int32_t hd_quantize_intervals_LF[257]

static

Definition at line 115 of file aptx.c.

hd_invert_quantize_dither_factors_LF

const int32_t hd_invert_quantize_dither_factors_LF[257]

static

Definition at line 150 of file aptx.c.

hd_quantize_dither_factors_LF

const int32_t hd_quantize_dither_factors_LF[256]

static

Definition at line 184 of file aptx.c.

hd_quantize_factor_select_offset_LF

const int16_t hd_quantize_factor_select_offset_LF[257]

static

Definition at line 218 of file aptx.c.

hd_quantize_intervals_MLF

const int32_t hd_quantize_intervals_MLF[33]

static

Initial value:

= {
      -21236,   21236,   63830,  106798,  150386,  194832,  240376,  287258,
      335726,  386034,  438460,  493308,  550924,  611696,  676082,  744626,
      817986,  896968,  982580, 1076118, 1179278, 1294344, 1424504, 1574386,
     1751090, 1966260, 2240868, 2617662, 3196432, 4176450, 5658260, 7671068,
    10380372,
}

Definition at line 254 of file aptx.c.

hd_invert_quantize_dither_factors_MLF

const int32_t hd_invert_quantize_dither_factors_MLF[33]

static

Initial value:

= {
    21236,  21236,  21360,  21608,  21978,  22468,  23076,   23806,
    24660,  25648,  26778,  28070,  29544,  31228,  33158,   35386,
    37974,  41008,  44606,  48934,  54226,  60840,  69320,   80564,
    96140, 119032, 155576, 221218, 357552, 622468, 859344, 1153464, 1555840,
}

Definition at line 261 of file aptx.c.

hd_quantize_dither_factors_MLF

const int32_t hd_quantize_dither_factors_MLF[32]

static

Initial value:

= {
       0,   31,    62,    93,   123,   152,   183,    214,
     247,  283,   323,   369,   421,   483,   557,    647,
     759,  900,  1082,  1323,  1654,  2120,  2811,   3894,
    5723, 9136, 16411, 34084, 66229, 59219, 73530, 100594,
}

Definition at line 267 of file aptx.c.

hd_quantize_factor_select_offset_MLF

const int16_t hd_quantize_factor_select_offset_MLF[33]

static

Initial value:

= {
      0, -21, -16, -12,  -7,  -2,   3,   8,
     13,  19,  24,  30,  36,  43,  50,  57,
     65,  74,  83,  93, 104, 117, 131, 147,
    166, 189, 219, 259, 322, 427, 521, 521, 521,
}

Definition at line 273 of file aptx.c.

hd_quantize_intervals_MHF

const int32_t hd_quantize_intervals_MHF[9]

static

Initial value:

= {
    -95044, 95044, 295844, 528780, 821332, 1226438, 1890540, 3344850, 6450664,
}

Definition at line 281 of file aptx.c.

hd_invert_quantize_dither_factors_MHF

const int32_t hd_invert_quantize_dither_factors_MHF[9]

static

Initial value:

= {
    95044, 95044, 105754, 127180, 165372, 39736, 424366, 1029946, 2075866,
}

Definition at line 284 of file aptx.c.

hd_quantize_dither_factors_MHF

const int32_t hd_quantize_dither_factors_MHF[8]

static

Initial value:

= {
    0, 2678, 5357, 9548, -31409, 96158, 151395, 261480,
}

Definition at line 287 of file aptx.c.

hd_quantize_factor_select_offset_MHF

const int16_t hd_quantize_factor_select_offset_MHF[9]

static

Initial value:

= {
    0, -17, 5, 30, 62, 105, 177, 334, 518,
}

Definition at line 290 of file aptx.c.

hd_quantize_intervals_HF

const int32_t hd_quantize_intervals_HF[17]

static

Initial value:

= {
     -45754,   45754,  138496,  234896,  337336,  448310,  570738,  708380,
     866534, 1053262, 1281958, 1577438, 1993050, 2665984, 3900982, 5902844,
    8897462,
}

Definition at line 295 of file aptx.c.

hd_invert_quantize_dither_factors_HF

const int32_t hd_invert_quantize_dither_factors_HF[17]

static

Initial value:

= {
    45754,  45754,  46988,  49412,  53026,  57950,  64478,   73164,
    84988, 101740, 126958, 168522, 247092, 425842, 809154, 1192708, 1801910,
}

Definition at line 300 of file aptx.c.

hd_quantize_dither_factors_HF

const int32_t hd_quantize_dither_factors_HF[16]

static

Initial value:

= {
       0,  309,   606,   904,  1231,  1632,  2172,   2956,
    4188, 6305, 10391, 19643, 44688, 95828, 95889, 152301,
}

Definition at line 304 of file aptx.c.

hd_quantize_factor_select_offset_HF

const int16_t hd_quantize_factor_select_offset_HF[17]

static

Initial value:

= {
     0, -18,  -8,   2,  13,  25,  38,  53,
    70,  90, 115, 147, 192, 264, 398, 521, 521,
}

Definition at line 308 of file aptx.c.

ff_aptx_quant_tables

ConstTables ff_aptx_quant_tables[2][NB_SUBBANDS]

Definition at line 313 of file aptx.c.

Referenced by aptx_encode_channel(), and ff_aptx_invert_quantize_and_prediction().

quantization_factors

const int16_t quantization_factors[32]

static

Initial value:

= {
    2048, 2093, 2139, 2186, 2233, 2282, 2332, 2383,
    2435, 2489, 2543, 2599, 2656, 2714, 2774, 2834,
    2896, 2960, 3025, 3091, 3158, 3228, 3298, 3371,
    3444, 3520, 3597, 3676, 3756, 3838, 3922, 4008,
}

Definition at line 368 of file aptx.c.

Referenced by aptx_invert_quantization().