mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
57f3213401
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18786 b3059339-0415-0410-9bf9-f77b7e298cf2
141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/*
|
|
* a52_internal.h
|
|
* Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
|
|
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
|
|
*
|
|
* This file is part of a52dec, a free ATSC A-52 stream decoder.
|
|
* See http://liba52.sourceforge.net/ for updates.
|
|
*
|
|
* Modified for use with MPlayer, changes contained in liba52_changes.diff.
|
|
* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
|
|
* $Id$
|
|
*
|
|
* a52dec 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.
|
|
*
|
|
* a52dec 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
|
|
*/
|
|
|
|
typedef struct {
|
|
uint8_t bai; /* fine SNR offset, fast gain */
|
|
uint8_t deltbae; /* delta bit allocation exists */
|
|
int8_t deltba[50]; /* per-band delta bit allocation */
|
|
} ba_t;
|
|
|
|
typedef struct {
|
|
uint8_t exp[256]; /* decoded channel exponents */
|
|
int8_t bap[256]; /* derived channel bit allocation */
|
|
} expbap_t;
|
|
|
|
struct a52_state_s {
|
|
uint8_t fscod; /* sample rate */
|
|
uint8_t halfrate; /* halfrate factor */
|
|
uint8_t acmod; /* coded channels */
|
|
uint8_t lfeon; /* coded lfe channel */
|
|
sample_t clev; /* centre channel mix level */
|
|
sample_t slev; /* surround channels mix level */
|
|
|
|
int output; /* type of output */
|
|
sample_t level; /* output level */
|
|
sample_t bias; /* output bias */
|
|
|
|
int dynrnge; /* apply dynamic range */
|
|
sample_t dynrng; /* dynamic range */
|
|
void * dynrngdata; /* dynamic range callback funtion and data */
|
|
sample_t (* dynrngcall) (sample_t range, void * dynrngdata);
|
|
|
|
uint8_t chincpl; /* channel coupled */
|
|
uint8_t phsflginu; /* phase flags in use (stereo only) */
|
|
uint8_t cplstrtmant; /* coupling channel start mantissa */
|
|
uint8_t cplendmant; /* coupling channel end mantissa */
|
|
uint32_t cplbndstrc; /* coupling band structure */
|
|
sample_t cplco[5][18]; /* coupling coordinates */
|
|
|
|
/* derived information */
|
|
uint8_t cplstrtbnd; /* coupling start band (for bit allocation) */
|
|
uint8_t ncplbnd; /* number of coupling bands */
|
|
|
|
uint8_t rematflg; /* stereo rematrixing */
|
|
|
|
uint8_t endmant[5]; /* channel end mantissa */
|
|
|
|
uint16_t bai; /* bit allocation information */
|
|
|
|
uint32_t * buffer_start;
|
|
uint16_t lfsr_state; /* dither state */
|
|
uint32_t bits_left;
|
|
uint32_t current_word;
|
|
|
|
uint8_t csnroffst; /* coarse SNR offset */
|
|
ba_t cplba; /* coupling bit allocation parameters */
|
|
ba_t ba[5]; /* channel bit allocation parameters */
|
|
ba_t lfeba; /* lfe bit allocation parameters */
|
|
|
|
uint8_t cplfleak; /* coupling fast leak init */
|
|
uint8_t cplsleak; /* coupling slow leak init */
|
|
|
|
expbap_t cpl_expbap;
|
|
expbap_t fbw_expbap[5];
|
|
expbap_t lfe_expbap;
|
|
|
|
sample_t * samples;
|
|
int downmixed;
|
|
};
|
|
|
|
#define LEVEL_PLUS6DB 2.0
|
|
#define LEVEL_PLUS3DB 1.4142135623730951
|
|
#define LEVEL_3DB 0.7071067811865476
|
|
#define LEVEL_45DB 0.5946035575013605
|
|
#define LEVEL_6DB 0.5
|
|
|
|
#define EXP_REUSE (0)
|
|
#define EXP_D15 (1)
|
|
#define EXP_D25 (2)
|
|
#define EXP_D45 (3)
|
|
|
|
#define DELTA_BIT_REUSE (0)
|
|
#define DELTA_BIT_NEW (1)
|
|
#define DELTA_BIT_NONE (2)
|
|
#define DELTA_BIT_RESERVED (3)
|
|
|
|
#ifdef ARCH_X86_64
|
|
# define REG_a "rax"
|
|
# define REG_d "rdx"
|
|
# define REG_S "rsi"
|
|
# define REG_D "rdi"
|
|
# define REG_BP "rbp"
|
|
#else
|
|
# define REG_a "eax"
|
|
# define REG_d "edx"
|
|
# define REG_S "esi"
|
|
# define REG_D "edi"
|
|
# define REG_BP "ebp"
|
|
#endif
|
|
|
|
void a52_bit_allocate (a52_state_t * state, ba_t * ba, int bndstart,
|
|
int start, int end, int fastleak, int slowleak,
|
|
expbap_t * expbap);
|
|
|
|
int a52_downmix_init (int input, int flags, sample_t * level,
|
|
sample_t clev, sample_t slev);
|
|
void downmix_accel_init(uint32_t mm_accel);
|
|
int a52_downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
|
|
sample_t clev, sample_t slev);
|
|
extern void (*a52_downmix) (sample_t * samples, int acmod, int output, sample_t bias,
|
|
sample_t clev, sample_t slev);
|
|
extern void (*a52_upmix) (sample_t * samples, int acmod, int output);
|
|
|
|
void a52_imdct_init (uint32_t mm_accel);
|
|
void a52_imdct_256 (sample_t * data, sample_t * delay, sample_t bias);
|
|
extern void (*a52_imdct_512) (sample_t * data, sample_t * delay, sample_t bias);
|
|
void imdct_do_512 (sample_t * data, sample_t * delay, sample_t bias);
|