diff options
Diffstat (limited to 'libfaad2/bits.c')
| -rw-r--r-- | libfaad2/bits.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/libfaad2/bits.c b/libfaad2/bits.c deleted file mode 100644 index 34efbd4f71..0000000000 --- a/libfaad2/bits.c +++ /dev/null @@ -1,213 +0,0 @@ -/* -** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding -** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com -** -** This program 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. -** -** This program 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. -** -** Any non-GPL usage of this software or parts of this software is strictly -** forbidden. -** -** Commercial non-GPL licensing of this software is possible. -** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. -** -** $Id: bits.c,v 1.39 2004/09/04 14:56:27 menno Exp $ -**/ - -#include "common.h" -#include "structs.h" - -#include <stdlib.h> -#include <string.h> -#include "bits.h" - -/* initialize buffer, call once before first getbits or showbits */ -void faad_initbits(bitfile *ld, const void *_buffer, const uint32_t buffer_size) -{ - uint32_t tmp; - - if (ld == NULL) - return; - - memset(ld, 0, sizeof(bitfile)); - - if (buffer_size == 0 || _buffer == NULL) - { - ld->error = 1; - ld->no_more_reading = 1; - return; - } - - ld->buffer = faad_malloc((buffer_size+12)*sizeof(uint8_t)); - memset(ld->buffer, 0, (buffer_size+12)*sizeof(uint8_t)); - memcpy(ld->buffer, _buffer, buffer_size*sizeof(uint8_t)); - - ld->buffer_size = buffer_size; - - tmp = getdword((uint32_t*)ld->buffer); - ld->bufa = tmp; - - tmp = getdword((uint32_t*)ld->buffer + 1); - ld->bufb = tmp; - - ld->start = (uint32_t*)ld->buffer; - ld->tail = ((uint32_t*)ld->buffer + 2); - - ld->bits_left = 32; - - ld->bytes_used = 0; - ld->no_more_reading = 0; - ld->error = 0; -} - -void faad_endbits(bitfile *ld) -{ - if (ld) - { - if (ld->buffer) - { - faad_free(ld->buffer); - ld->buffer = NULL; - } - } -} - -uint32_t faad_get_processed_bits(bitfile *ld) -{ - return (uint32_t)(8 * (4*(ld->tail - ld->start) - 4) - (ld->bits_left)); -} - -uint8_t faad_byte_align(bitfile *ld) -{ - uint8_t remainder = (uint8_t)((32 - ld->bits_left) % 8); - - if (remainder) - { - faad_flushbits(ld, 8 - remainder); - return (8 - remainder); - } - return 0; -} - -void faad_flushbits_ex(bitfile *ld, uint32_t bits) -{ - uint32_t tmp; - - ld->bufa = ld->bufb; - if (ld->no_more_reading == 0) - { - tmp = getdword(ld->tail); - ld->tail++; - } else { - tmp = 0; - } - ld->bufb = tmp; - ld->bits_left += (32 - bits); - ld->bytes_used += 4; - if (ld->bytes_used == ld->buffer_size) - ld->no_more_reading = 1; - if (ld->bytes_used > ld->buffer_size) - ld->error = 1; -} - -/* rewind to beginning */ -void faad_rewindbits(bitfile *ld) -{ - uint32_t tmp; - - tmp = ld->start[0]; -#ifndef ARCH_IS_BIG_ENDIAN - BSWAP(tmp); -#endif - ld->bufa = tmp; - - tmp = ld->start[1]; -#ifndef ARCH_IS_BIG_ENDIAN - BSWAP(tmp); -#endif - ld->bufb = tmp; - ld->bits_left = 32; - ld->tail = &ld->start[2]; - ld->bytes_used = 0; - ld->no_more_reading = 0; -} - -uint8_t *faad_getbitbuffer(bitfile *ld, uint32_t bits - DEBUGDEC) -{ - uint16_t i; - uint8_t temp; - uint16_t bytes = (uint16_t)bits / 8; - uint8_t remainder = (uint8_t)bits % 8; - - uint8_t *buffer = (uint8_t*)faad_malloc((bytes+1)*sizeof(uint8_t)); - - for (i = 0; i < bytes; i++) - { - buffer[i] = (uint8_t)faad_getbits(ld, 8 DEBUGVAR(print,var,dbg)); - } - - if (remainder) - { - temp = (uint8_t)faad_getbits(ld, remainder DEBUGVAR(print,var,dbg)) << (8-remainder); - - buffer[bytes] = temp; - } - - return buffer; -} - -#ifdef DRM -/* return the original data buffer */ -void *faad_origbitbuffer(bitfile *ld) -{ - return (void*)ld->start; -} - -/* return the original data buffer size */ -uint32_t faad_origbitbuffer_size(bitfile *ld) -{ - return ld->buffer_size; -} -#endif - -/* reversed bit reading routines, used for RVLC and HCR */ -void faad_initbits_rev(bitfile *ld, void *buffer, - uint32_t bits_in_buffer) -{ - uint32_t tmp; - int32_t index; - - ld->buffer_size = bit2byte(bits_in_buffer); - - index = (bits_in_buffer+31)/32 - 1; - - ld->start = (uint32_t*)buffer + index - 2; - - tmp = getdword((uint32_t*)buffer + index); - ld->bufa = tmp; - - tmp = getdword((uint32_t*)buffer + index - 1); - ld->bufb = tmp; - - ld->tail = (uint32_t*)buffer + index; - - ld->bits_left = bits_in_buffer % 32; - if (ld->bits_left == 0) - ld->bits_left = 32; - - ld->bytes_used = 0; - ld->no_more_reading = 0; - ld->error = 0; -} |