FFmpeg
Functions | Variables
nellymoser.c File Reference

The 3 alphanumeric copyright notices are md5summed they are from the original implementors. More...

#include "libavutil/common.h"
#include "avcodec.h"
#include "nellymoser.h"

Go to the source code of this file.

Functions

static int signed_shift (int i, int shift)
 
static int sum_bits (short *buf, short shift, short off)
 
static int headroom (int *la)
 
void ff_nelly_get_sample_bits (const float *buf, int *bits)
 

Variables

const float ff_nelly_dequantization_table [127]
 
const uint8_t ff_nelly_band_sizes_table [NELLY_BANDS]
 
const uint16_t ff_nelly_init_table [64]
 
const int16_t ff_nelly_delta_table [32]
 

Detailed Description

The 3 alphanumeric copyright notices are md5summed they are from the original implementors.

The original code is available from http://code.google.com/p/nelly2pcm/

Definition in file nellymoser.c.

Function Documentation

static int signed_shift ( int  i,
int  shift 
)
inlinestatic

Definition at line 85 of file nellymoser.c.

Referenced by ff_nelly_get_sample_bits().

static int sum_bits ( short buf,
short  shift,
short  off 
)
static

Definition at line 91 of file nellymoser.c.

Referenced by ff_nelly_get_sample_bits().

static int headroom ( int la)
static

Definition at line 104 of file nellymoser.c.

Referenced by ff_nelly_get_sample_bits().

void ff_nelly_get_sample_bits ( const float *  buf,
int bits 
)

Definition at line 116 of file nellymoser.c.

Referenced by encode_block(), and nelly_decode_block().

Variable Documentation

const float ff_nelly_dequantization_table[127]
Initial value:
= {
0.0000000000,
-0.8472560048, 0.7224709988,
-1.5247479677,-0.4531480074, 0.3753609955, 1.4717899561,
-1.9822579622,-1.1929379702,-0.5829370022,-0.0693780035, 0.3909569979, 0.9069200158, 1.4862740040, 2.2215409279,
-2.3887870312,-1.8067539930,-1.4105420113,-1.0773609877,-0.7995010018,-0.5558109879,-0.3334020078,-0.1324490011,
0.0568020009, 0.2548770010, 0.4773550034, 0.7386850119, 1.0443060398, 1.3954459429, 1.8098750114, 2.3918759823,
-2.3893830776,-1.9884680510,-1.7514040470,-1.5643119812,-1.3922129869,-1.2164649963,-1.0469499826,-0.8905100226,
-0.7645580173,-0.6454579830,-0.5259280205,-0.4059549868,-0.3029719889,-0.2096900046,-0.1239869967,-0.0479229987,
0.0257730000, 0.1001340002, 0.1737180054, 0.2585540116, 0.3522900045, 0.4569880068, 0.5767750144, 0.7003160119,
0.8425520062, 1.0093879700, 1.1821349859, 1.3534560204, 1.5320819616, 1.7332619429, 1.9722349644, 2.3978140354,
-2.5756309032,-2.0573320389,-1.8984919786,-1.7727810144,-1.6662600040,-1.5742180347,-1.4993319511,-1.4316639900,
-1.3652280569,-1.3000990152,-1.2280930281,-1.1588579416,-1.0921250582,-1.0135740042,-0.9202849865,-0.8287050128,
-0.7374889851,-0.6447759867,-0.5590940118,-0.4857139885,-0.4110319912,-0.3459700048,-0.2851159871,-0.2341620028,
-0.1870580018,-0.1442500055,-0.1107169986,-0.0739680007,-0.0365610011,-0.0073290002, 0.0203610007, 0.0479039997,
0.0751969963, 0.0980999991, 0.1220389977, 0.1458999962, 0.1694349945, 0.1970459968, 0.2252430022, 0.2556869984,
0.2870100141, 0.3197099864, 0.3525829911, 0.3889069855, 0.4334920049, 0.4769459963, 0.5204820037, 0.5644530058,
0.6122040153, 0.6685929894, 0.7341650128, 0.8032159805, 0.8784040213, 0.9566209912, 1.0397069454, 1.1293770075,
1.2211159468, 1.3080279827, 1.4024800062, 1.5056819916, 1.6227730513, 1.7724959850, 1.9430880547, 2.2903931141
}

Definition at line 39 of file nellymoser.c.

Referenced by encode_block(), and nelly_decode_block().

const uint8_t ff_nelly_band_sizes_table[NELLY_BANDS]
Initial value:
= {
2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 6, 6, 7, 8, 9, 10, 12, 14, 15
}

Definition at line 66 of file nellymoser.c.

Referenced by encode_block(), and nelly_decode_block().

const uint16_t ff_nelly_init_table[64]
Initial value:
= {
3134, 5342, 6870, 7792, 8569, 9185, 9744, 10191, 10631, 11061, 11434, 11770,
12116, 12513, 12925, 13300, 13674, 14027, 14352, 14716, 15117, 15477, 15824,
16157, 16513, 16804, 17090, 17401, 17679, 17948, 18238, 18520, 18764, 19078,
19381, 19640, 19921, 20205, 20500, 20813, 21162, 21465, 21794, 22137, 22453,
22756, 23067, 23350, 23636, 23926, 24227, 24521, 24819, 25107, 25414, 25730,
26120, 26497, 26895, 27344, 27877, 28463, 29426, 31355
}

Definition at line 70 of file nellymoser.c.

Referenced by encode_block(), get_exponent_dynamic(), get_exponent_greedy(), and nelly_decode_block().

const int16_t ff_nelly_delta_table[32]
Initial value:
= {
-11725, -9420, -7910, -6801, -5948, -5233, -4599, -4039, -3507, -3030, -2596,
-2170, -1774, -1383, -1016, -660, -329, -1, 337, 696, 1085, 1512, 1962, 2433,
2968, 3569, 4314, 5279, 6622, 8154, 10076, 12975
}

Definition at line 79 of file nellymoser.c.

Referenced by encode_block(), get_exponent_dynamic(), get_exponent_greedy(), and nelly_decode_block().