1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16//#define LOG_NDEBUG 0
17#define LOG_TAG "DataSourceBase"
18
19#include <media/DataSourceBase.h>
20#include <media/stagefright/foundation/ByteUtils.h>
21#include <media/stagefright/MediaErrors.h>
22#include <utils/String8.h>
23
24namespace android {
25
26bool DataSourceBase::getUInt16(off64_t offset, uint16_t *x) {
27    *x = 0;
28
29    uint8_t byte[2];
30    if (readAt(offset, byte, 2) != 2) {
31        return false;
32    }
33
34    *x = (byte[0] << 8) | byte[1];
35
36    return true;
37}
38
39bool DataSourceBase::getUInt24(off64_t offset, uint32_t *x) {
40    *x = 0;
41
42    uint8_t byte[3];
43    if (readAt(offset, byte, 3) != 3) {
44        return false;
45    }
46
47    *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
48
49    return true;
50}
51
52bool DataSourceBase::getUInt32(off64_t offset, uint32_t *x) {
53    *x = 0;
54
55    uint32_t tmp;
56    if (readAt(offset, &tmp, 4) != 4) {
57        return false;
58    }
59
60    *x = ntohl(tmp);
61
62    return true;
63}
64
65bool DataSourceBase::getUInt64(off64_t offset, uint64_t *x) {
66    *x = 0;
67
68    uint64_t tmp;
69    if (readAt(offset, &tmp, 8) != 8) {
70        return false;
71    }
72
73    *x = ntoh64(tmp);
74
75    return true;
76}
77
78bool DataSourceBase::getUInt16Var(off64_t offset, uint16_t *x, size_t size) {
79    if (size == 2) {
80        return getUInt16(offset, x);
81    }
82    if (size == 1) {
83        uint8_t tmp;
84        if (readAt(offset, &tmp, 1) == 1) {
85            *x = tmp;
86            return true;
87        }
88    }
89    return false;
90}
91
92bool DataSourceBase::getUInt32Var(off64_t offset, uint32_t *x, size_t size) {
93    if (size == 4) {
94        return getUInt32(offset, x);
95    }
96    if (size == 2) {
97        uint16_t tmp;
98        if (getUInt16(offset, &tmp)) {
99            *x = tmp;
100            return true;
101        }
102    }
103    return false;
104}
105
106bool DataSourceBase::getUInt64Var(off64_t offset, uint64_t *x, size_t size) {
107    if (size == 8) {
108        return getUInt64(offset, x);
109    }
110    if (size == 4) {
111        uint32_t tmp;
112        if (getUInt32(offset, &tmp)) {
113            *x = tmp;
114            return true;
115        }
116    }
117    return false;
118}
119
120status_t DataSourceBase::getSize(off64_t *size) {
121    *size = 0;
122
123    return ERROR_UNSUPPORTED;
124}
125
126bool DataSourceBase::getUri(char *uriString __unused, size_t bufferSize __unused) {
127    return false;
128}
129
130}  // namespace android
131