/* * Copyright © 2018, VideoLAN and dav1d authors * Copyright © 2018, Two Orioles, LLC * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this *    list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, *    this list of conditions and the following disclaimer in the documentation *    and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef DAV1D_SRC_GETBITS_H#define DAV1D_SRC_GETBITS_H #include <stddef.h>#include <stdint.h> typedef struct GetBits {    int error, eof;    uint64_t state;    unsigned bits_left;    const uint8_t *ptr, *ptr_start, *ptr_end;} GetBits; void dav1d_init_get_bits(GetBits *c, const uint8_t *data, size_t sz);unsigned dav1d_get_bits(GetBits *c, unsigned n);int dav1d_get_sbits(GetBits *c, unsigned n);unsigned dav1d_get_uleb128(GetBits *c); // Output in range 0..max-1unsigned dav1d_get_uniform(GetBits *c, unsigned max);unsigned dav1d_get_vlc(GetBits *c);int dav1d_get_bits_subexp(GetBits *c, int ref, unsigned n); // Discard bits from the buffer until we're next byte-aligned.void dav1d_bytealign_get_bits(GetBits *c); // Return the current bit position relative to the start of the buffer.static inline unsigned dav1d_get_bits_pos(const GetBits *c) {    return (unsigned) (c->ptr - c->ptr_start) * 8 - c->bits_left;} #endif /* DAV1D_SRC_GETBITS_H */