summaryrefslogtreecommitdiff
path: root/lib/faad2/libfaad/bits.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/faad2/libfaad/bits.c')
-rw-r--r--lib/faad2/libfaad/bits.c292
1 files changed, 0 insertions, 292 deletions
diff --git a/lib/faad2/libfaad/bits.c b/lib/faad2/libfaad/bits.c
deleted file mode 100644
index 110c9dc4..00000000
--- a/lib/faad2/libfaad/bits.c
+++ /dev/null
@@ -1,292 +0,0 @@
-/*
-** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
-** Copyright (C) 2003-2005 M. Bakker, Nero 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.
-**
-** The "appropriate copyright message" mentioned in section 2c of the GPLv2
-** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
-**
-** Commercial non-GPL licensing of this software is possible.
-** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
-**
-** $Id: bits.c,v 1.44 2007/11/01 12:33:29 menno Exp $
-**/
-
-#include "common.h"
-#include "structs.h"
-
-#include <stdlib.h>
-#include "bits.h"
-
-/* reads only n bytes from the stream instead of the standard 4 */
-static /*INLINE*/ uint32_t getdword_n(void *mem, int n)
-{
- uint8_t* m8 = (uint8_t*)mem;
- switch (n)
- {
- case 3:
- return ((uint32_t)m8[2] << 8) | ((uint32_t)m8[1] << 16) | ((uint32_t)m8[0] << 24);
- case 2:
- return ((uint32_t)m8[1] << 16) | ((uint32_t)m8[0] << 24);
- case 1:
- return (uint32_t)m8[0] << 24;
- default:
- return 0;
- }
-}
-
-/* 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;
-
- if (buffer_size == 0 || _buffer == NULL)
- {
- ld->error = 1;
- return;
- }
-
- ld->buffer = _buffer;
-
- ld->buffer_size = buffer_size;
- ld->bytes_left = buffer_size;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword((uint32_t*)ld->buffer);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n((uint32_t*)ld->buffer, ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufa = tmp;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword((uint32_t*)ld->buffer + 1);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n((uint32_t*)ld->buffer + 1, ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufb = tmp;
-
- ld->start = (uint32_t*)ld->buffer;
- ld->tail = ((uint32_t*)ld->buffer + 2);
-
- ld->bits_left = 32;
-
- ld->error = 0;
-}
-
-void faad_endbits(bitfile *ld)
-{
- (void)ld;
-}
-
-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)
-{
- int remainder = (32 - ld->bits_left) & 0x7;
-
- if (remainder)
- {
- faad_flushbits(ld, 8 - remainder);
- return (uint8_t)(8 - remainder);
- }
- return 0;
-}
-
-void faad_flushbits_ex(bitfile *ld, uint32_t bits)
-{
- uint32_t tmp;
-
- ld->bufa = ld->bufb;
- if (ld->bytes_left >= 4)
- {
- tmp = getdword(ld->tail);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n(ld->tail, ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufb = tmp;
- ld->tail++;
- ld->bits_left += (32 - bits);
- //ld->bytes_left -= 4;
-// if (ld->bytes_left == 0)
-// ld->no_more_reading = 1;
-// if (ld->bytes_left < 0)
-// ld->error = 1;
-}
-
-#ifdef DRM
-/* rewind to beginning */
-void faad_rewindbits(bitfile *ld)
-{
- uint32_t tmp;
-
- ld->bytes_left = ld->buffer_size;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword((uint32_t*)&ld->start[0]);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n((uint32_t*)&ld->start[0], ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufa = tmp;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword((uint32_t*)&ld->start[1]);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n((uint32_t*)&ld->start[1], ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufb = tmp;
-
- ld->bits_left = 32;
- ld->tail = &ld->start[2];
-}
-#endif
-
-/* reset to a certain point */
-void faad_resetbits(bitfile *ld, uint32_t bits)
-{
- uint32_t tmp;
- uint32_t words = bits >> 5;
- uint32_t remainder = bits & 0x1F;
-
- if (ld->buffer_size < words * 4)
- ld->bytes_left = 0;
- else
- ld->bytes_left = ld->buffer_size - words*4;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword(&ld->start[words]);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n(&ld->start[words], ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufa = tmp;
-
- if (ld->bytes_left >= 4)
- {
- tmp = getdword(&ld->start[words+1]);
- ld->bytes_left -= 4;
- } else {
- tmp = getdword_n(&ld->start[words+1], ld->bytes_left);
- ld->bytes_left = 0;
- }
- ld->bufb = tmp;
-
- ld->bits_left = 32 - remainder;
- ld->tail = &ld->start[words+2];
-
- /* recheck for reading too many bytes */
- ld->error = 0;
-// if (ld->bytes_left == 0)
-// ld->no_more_reading = 1;
-// if (ld->bytes_left < 0)
-// ld->error = 1;
-}
-
-uint8_t *faad_getbitbuffer(bitfile *ld, uint32_t bits
- DEBUGDEC)
-{
- int i;
- unsigned int temp;
- int bytes = bits >> 3;
- int remainder = bits & 0x7;
-
- 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 = faad_getbits(ld, remainder DEBUGVAR(print,var,dbg)) << (8-remainder);
-
- buffer[bytes] = (uint8_t)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
-
-#if 0
-/* 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_left = ld->buffer_size;
- ld->error = 0;
-}
-#endif
-
-/* EOF */
generated by cgit v1.2.3 (git 2.25.1) at 2026-04-29 20:00:19 +0000