diff options
Diffstat (limited to 'src/libdts/bitstream.c')
-rw-r--r-- | src/libdts/bitstream.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/src/libdts/bitstream.c b/src/libdts/bitstream.c deleted file mode 100644 index 50b2b9fe8..000000000 --- a/src/libdts/bitstream.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * bitstream.c - * Copyright (C) 2004 Gildas Bazin <gbazin@videolan.org> - * 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 dtsdec, a free DTS Coherent Acoustics stream decoder. - * See http://www.videolan.org/dtsdec.html for updates. - * - * dtsdec 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. - * - * dtsdec 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 - */ - -#include "config.h" - -#include <inttypes.h> - -#include "internal-dts.h" -#include "dts_internal.h" -#include "bitstream.h" - -#define BUFFER_SIZE 4096 - -void dts_bitstream_init (dts_state_t * state, uint8_t * buf, int word_mode, - int bigendian_mode) -{ - intptr_t align; - - align = (uintptr_t)buf & 3; - state->buffer_start = (uint32_t *) (buf - align); - state->bits_left = 0; - state->current_word = 0; - state->word_mode = word_mode; - state->bigendian_mode = bigendian_mode; - bitstream_get (state, align * 8); -} -#include<stdio.h> -static inline void bitstream_fill_current (dts_state_t * state) -{ - uint32_t tmp; - - tmp = *(state->buffer_start++); - - if (state->bigendian_mode) - state->current_word = swab32 (tmp); - else - state->current_word = swable32 (tmp); - - if (!state->word_mode) - { - state->current_word = (state->current_word & 0x00003FFF) | - ((state->current_word & 0x3FFF0000 ) >> 2); - } -} - -/* - * The fast paths for _get is in the - * bitstream.h header file so it can be inlined. - * - * The "bottom half" of this routine is suffixed _bh - * - * -ah - */ - -uint32_t dts_bitstream_get_bh (dts_state_t * state, uint32_t num_bits) -{ - uint32_t result; - - num_bits -= state->bits_left; - - result = ((state->current_word << (32 - state->bits_left)) >> - (32 - state->bits_left)); - - if ( !state->word_mode && num_bits > 28 ) { - bitstream_fill_current (state); - result = (result << 28) | state->current_word; - num_bits -= 28; - } - - bitstream_fill_current (state); - - if ( state->word_mode ) - { - if (num_bits != 0) - result = (result << num_bits) | - (state->current_word >> (32 - num_bits)); - - state->bits_left = 32 - num_bits; - } - else - { - if (num_bits != 0) - result = (result << num_bits) | - (state->current_word >> (28 - num_bits)); - - state->bits_left = 28 - num_bits; - } - - return result; -} |