/src/aom/aom_dsp/bitreader.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright (c) 2016, Alliance for Open Media. All rights reserved. |
3 | | * |
4 | | * This source code is subject to the terms of the BSD 2 Clause License and |
5 | | * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
6 | | * was not distributed with this source code in the LICENSE file, you can |
7 | | * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
8 | | * Media Patent License 1.0 was not distributed with this source code in the |
9 | | * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
10 | | */ |
11 | | |
12 | | #include "aom_dsp/bitreader.h" |
13 | | |
14 | 162k | int aom_reader_init(aom_reader *r, const uint8_t *buffer, size_t size) { |
15 | 162k | if (size && !buffer) { |
16 | 0 | return 1; |
17 | 0 | } |
18 | 162k | r->buffer_end = buffer + size; |
19 | 162k | r->buffer = buffer; |
20 | 162k | od_ec_dec_init(&r->ec, buffer, (uint32_t)size); |
21 | | #if CONFIG_ACCOUNTING |
22 | | r->accounting = NULL; |
23 | | #endif |
24 | 162k | return 0; |
25 | 162k | } |
26 | | |
27 | 103k | const uint8_t *aom_reader_find_begin(aom_reader *r) { return r->buffer; } |
28 | | |
29 | 187k | const uint8_t *aom_reader_find_end(aom_reader *r) { return r->buffer_end; } |
30 | | |
31 | 1.36M | uint32_t aom_reader_tell(const aom_reader *r) { return od_ec_dec_tell(&r->ec); } |
32 | | |
33 | 0 | uint32_t aom_reader_tell_frac(const aom_reader *r) { |
34 | 0 | return od_ec_dec_tell_frac(&r->ec); |
35 | 0 | } |
36 | | |
37 | 1.25M | int aom_reader_has_overflowed(const aom_reader *r) { |
38 | 1.25M | const uint32_t tell_bits = aom_reader_tell(r); |
39 | 1.25M | const uint32_t tell_bytes = (tell_bits + 7) >> 3; |
40 | 1.25M | return ((ptrdiff_t)tell_bytes > r->buffer_end - r->buffer); |
41 | 1.25M | } |