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bitstream.h
Package: tcpmp.rar [view]
Upload User: wstnjxml
Upload Date: 2014-04-03
Package Size: 7248k
Code Size: 2k
Category:
Windows CE
Development Platform:
C/C++
- /*
- * bitstream.h
- * Copyright (C) 2000-2003 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.
- *
- * 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
- */
- /* (stolen from the kernel) */
- #ifdef WORDS_BIGENDIAN
- # define swab32(x) (x)
- #else
- # if 0 && defined (__i386__)
- # define swab32(x) __i386_swab32(x)
- static inline const uint32_t __i386_swab32(uint32_t x)
- {
- __asm__("bswap %0" : "=r" (x) : "0" (x));
- return x;
- }
- # else
- # define swab32(x)
- ((((uint8_t*)&x)[0] << 24) | (((uint8_t*)&x)[1] << 16) |
- (((uint8_t*)&x)[2] << 8) | (((uint8_t*)&x)[3]))
- # endif
- #endif
- void a52_bitstream_set_ptr (a52_state_t * state, uint8_t * buf);
- uint32_t a52_bitstream_get_bh (a52_state_t * state, uint32_t num_bits);
- int32_t a52_bitstream_get_bh_2 (a52_state_t * state, uint32_t num_bits);
- static inline uint32_t bitstream_get (a52_state_t * state, uint32_t num_bits)
- {
- uint32_t result;
- if (num_bits < state->bits_left) {
- result = (state->current_word << (32 - state->bits_left)) >> (32 - num_bits);
- state->bits_left -= num_bits;
- return result;
- }
- return a52_bitstream_get_bh (state, num_bits);
- }
- static inline int32_t bitstream_get_2 (a52_state_t * state, uint32_t num_bits)
- {
- int32_t result;
- if (num_bits < state->bits_left) {
- result = (((int32_t)state->current_word) << (32 - state->bits_left)) >> (32 - num_bits);
- state->bits_left -= num_bits;
- return result;
- }
- return a52_bitstream_get_bh_2 (state, num_bits);
- }