From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/liba52/a52_internal.h | 215 +++++++++++++++++++++++++++++++ 1 file changed, 215 insertions(+) create mode 100644 lib/rbcodec/codecs/liba52/a52_internal.h (limited to 'lib/rbcodec/codecs/liba52/a52_internal.h') diff --git a/lib/rbcodec/codecs/liba52/a52_internal.h b/lib/rbcodec/codecs/liba52/a52_internal.h new file mode 100644 index 0000000000..3b3d21c9a3 --- /dev/null +++ b/lib/rbcodec/codecs/liba52/a52_internal.h @@ -0,0 +1,215 @@ +/* + * a52_internal.h + * Copyright (C) 2000-2003 Michel Lespinasse + * Copyright (C) 1999-2000 Aaron Holtzman + * + * This file is part of a52dec, a free ATSC A-52 stream decoder. + * See http://liba52.sourceforge.net/ for updates. + * + * 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 */ + level_t clev; /* centre channel mix level */ + level_t slev; /* surround channels mix level */ + + int output; /* type of output */ + level_t level; /* output level */ + sample_t bias; /* output bias */ + + int dynrnge; /* apply dynamic range */ + level_t dynrng; /* dynamic range */ + void * dynrngdata; /* dynamic range callback funtion and data */ + level_t (* dynrngcall) (level_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 */ + level_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) + +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, level_t * level, + level_t clev, level_t slev); +int a52_downmix_coeff (level_t * coeff, int acmod, int output, level_t level, + level_t clev, level_t slev); +void a52_downmix (sample_t * samples, int acmod, int output, + level_t clev, level_t slev); +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); +void a52_imdct_512 (sample_t * data, sample_t * delay); + +#define ROUND(x) ((int)((x) + ((x) > 0 ? 0.5 : -0.5))) + +#ifndef LIBA52_FIXED + +typedef sample_t quantizer_t; +#define SAMPLE(x) (x) +#define LEVEL(x) (x) +#define MUL(a,b) ((a) * (b)) +#define MUL_L(a,b) ((a) * (b)) +#define MUL_C(a,b) ((a) * (b)) +#define DIV(a,b) ((a) / (b)) +#define BIAS(x) ((x) + bias) + +#else /* LIBA52_FIXED */ + +typedef int16_t quantizer_t; +#define SAMPLE(x) (sample_t)((x) * (1 << 30)) +#define LEVEL(x) (level_t)((x) * (1 << 26)) + +#if 0 +#define MUL(a,b) ((int)(((int64_t)(a) * (b) + (1 << 29)) >> 30)) +#define MUL_L(a,b) ((int)(((int64_t)(a) * (b) + (1 << 25)) >> 26)) +#elif defined(CPU_COLDFIRE) +/* loses 1 bit of accuracy */ +#define MUL(a, b) \ +({ \ + int32_t t; \ + asm volatile ( \ + "mac.l %[A], %[B], %%acc0\n\t" \ + "movclr.l %%acc0, %[t]\n\t" \ + "asl.l #1, %[t]" \ + : [t] "=d" (t) \ + : [A] "r" ((a)), [B] "r" ((b))); \ + t; \ +}) +/* loses 5 bits of accuracy */ +#define MUL_L(a, b) \ +({ \ + int32_t t; \ + asm volatile ( \ + "mac.l %[A], %[B], %%acc0\n\t" \ + "movclr.l %%acc0, %[t]\n\t" \ + "asl.l #5, %[t]" \ + : [t] "=d" (t) \ + : [A] "r" ((a)), [B] "r" ((b))); \ + t; \ +}) + +#elif defined(CPU_ARM) +#define MUL(x, y) \ + ({ int32_t __hi; \ + uint32_t __lo; \ + int32_t __result; \ + asm ("smull %0, %1, %3, %4\n\t" \ + "movs %2, %1, lsl #2" \ + : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ + : "%r" (x), "r" (y) \ + : "cc"); \ + __result; \ + }) + + +#define MUL_L(x, y) \ + ({ int32_t __hi; \ + uint32_t __lo; \ + int32_t __result; \ + asm ("smull %0, %1, %3, %4\n\t" \ + "movs %0, %0, lsr %5\n\t" \ + "adc %2, %0, %1, lsl %6" \ + : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ + : "%r" (x), "r" (y), \ + "M" (26), "M" (32 - 26) \ + : "cc"); \ + __result; \ + }) + + +#elif 1 +#define MUL(a,b) \ +({ int32_t _ta=(a), _tb=(b), _tc; \ + _tc=(_ta & 0xffff)*(_tb >> 16)+(_ta >> 16)*(_tb & 0xffff); (int32_t)(((_tc >> 14))+ (((_ta >> 16)*(_tb >> 16)) << 2 )); }) +#define MUL_L(a,b) \ +({ int32_t _ta=(a), _tb=(b), _tc; \ + _tc=(_ta & 0xffff)*(_tb >> 16)+(_ta >> 16)*(_tb & 0xffff); (int32_t)((_tc >> 10) + (((_ta >> 16)*(_tb >> 16)) << 6)); }) +#else +#define MUL(a,b) (((a) >> 15) * ((b) >> 15)) +#define MUL_L(a,b) (((a) >> 13) * ((b) >> 13)) +#endif + +#define MUL_C(a,b) MUL_L (a, LEVEL (b)) +#define DIV(a,b) ((((int64_t)LEVEL (a)) << 26) / (b)) +#define BIAS(x) ((x)) + +#endif -- cgit v1.2.3