#include "avcodec.h"
#include "random.h"
#include "dsputil.h"
#include "bitstream.h"
Go to the source code of this file.
Data Structures | |
struct | NellyMoserDecodeContext |
Defines | |
#define | ALT_BITSTREAM_READER_LE |
#define | NELLY_BANDS 23 |
#define | NELLY_BLOCK_LEN 64 |
#define | NELLY_HEADER_BITS 116 |
#define | NELLY_DETAIL_BITS 198 |
#define | NELLY_BUF_LEN 128 |
#define | NELLY_FILL_LEN 124 |
#define | NELLY_BIT_CAP 6 |
#define | NELLY_BASE_OFF 4228 |
#define | NELLY_BASE_SHIFT 19 |
#define | NELLY_SAMPLES (2 * NELLY_BUF_LEN) |
Functions | |
static | DECLARE_ALIGNED_16 (float, sine_window[128]) |
static int | signed_shift (int i, int shift) |
static void | overlap_and_window (NellyMoserDecodeContext *s, float *state, float *audio) |
static int | sum_bits (short *buf, short shift, short off) |
static int | headroom (int *la) |
static void | get_sample_bits (const float *buf, int *bits) |
void | nelly_decode_block (NellyMoserDecodeContext *s, const unsigned char block[NELLY_BLOCK_LEN], float audio[NELLY_SAMPLES]) |
static int | decode_init (AVCodecContext *avctx) |
static int | decode_tag (AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size) |
static int | decode_end (AVCodecContext *avctx) |
Variables | |
static const float | dequantization_table [127] |
static const uint8_t | nelly_band_sizes_table [NELLY_BANDS] |
static const uint16_t | nelly_init_table [64] |
static const int16_t | nelly_delta_table [32] |
AVCodec | nellymoser_decoder |
The original code is available from http://code.google.com/p/nelly2pcm/
Definition in file nellymoserdec.c.
#define ALT_BITSTREAM_READER_LE |
Definition at line 37 of file nellymoserdec.c.
#define NELLY_BANDS 23 |
#define NELLY_BASE_OFF 4228 |
#define NELLY_BASE_SHIFT 19 |
#define NELLY_BIT_CAP 6 |
#define NELLY_BLOCK_LEN 64 |
#define NELLY_BUF_LEN 128 |
Definition at line 44 of file nellymoserdec.c.
Referenced by nelly_decode_block(), and overlap_and_window().
#define NELLY_DETAIL_BITS 198 |
Definition at line 43 of file nellymoserdec.c.
Referenced by get_sample_bits(), and nelly_decode_block().
#define NELLY_FILL_LEN 124 |
Definition at line 45 of file nellymoserdec.c.
Referenced by get_sample_bits(), nelly_decode_block(), and sum_bits().
#define NELLY_HEADER_BITS 116 |
#define NELLY_SAMPLES (2 * NELLY_BUF_LEN) |
static DECLARE_ALIGNED_16 | ( | float | , | |
sine_window | [128] | |||
) | [static] |
static int decode_end | ( | AVCodecContext * | avctx | ) | [static] |
Definition at line 394 of file nellymoserdec.c.
static int decode_init | ( | AVCodecContext * | avctx | ) | [static] |
Definition at line 332 of file nellymoserdec.c.
static int decode_tag | ( | AVCodecContext * | avctx, | |
void * | data, | |||
int * | data_size, | |||
const uint8_t * | buf, | |||
int | buf_size | |||
) | [static] |
Definition at line 359 of file nellymoserdec.c.
static void get_sample_bits | ( | const float * | buf, | |
int * | bits | |||
) | [static] |
static int headroom | ( | int * | la | ) | [static] |
void nelly_decode_block | ( | NellyMoserDecodeContext * | s, | |
const unsigned char | block[NELLY_BLOCK_LEN], | |||
float | audio[NELLY_SAMPLES] | |||
) |
static void overlap_and_window | ( | NellyMoserDecodeContext * | s, | |
float * | state, | |||
float * | audio | |||
) | [static] |
static int signed_shift | ( | int | i, | |
int | shift | |||
) | [inline, static] |
static int sum_bits | ( | short * | buf, | |
short | shift, | |||
short | off | |||
) | [static] |
const float dequantization_table[127] [static] |
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 51 of file nellymoserdec.c.
Referenced by nelly_decode_block().
const uint8_t nelly_band_sizes_table[NELLY_BANDS] [static] |
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 73 of file nellymoserdec.c.
Referenced by nelly_decode_block().
const int16_t nelly_delta_table[32] [static] |
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 86 of file nellymoserdec.c.
Referenced by nelly_decode_block().
const uint16_t nelly_init_table[64] [static] |
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 77 of file nellymoserdec.c.
Referenced by nelly_decode_block().
Initial value:
{ "nellymoser", CODEC_TYPE_AUDIO, CODEC_ID_NELLYMOSER, sizeof(NellyMoserDecodeContext), decode_init, NULL, decode_end, decode_tag, }
Definition at line 401 of file nellymoserdec.c.