FileSource.cpp revision 20111aa043c5f404472bc63b90bc5aad906b1101 
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
17#include <media/stagefright/FileSource.h>
18
19#undef NDEBUG
20#include <assert.h>
21
22namespace android {
23
24FileSource::FileSource(const char *filename)
25    : mFile(fopen(filename, "rb")) {
26}
27
28FileSource::~FileSource() {
29    if (mFile != NULL) {
30        fclose(mFile);
31        mFile = NULL;
32    }
33}
34
35status_t FileSource::InitCheck() const {
36    return mFile != NULL ? OK : NO_INIT;
37}
38
39ssize_t FileSource::read_at(off_t offset, void *data, size_t size) {
40    Mutex::Autolock autoLock(mLock);
41
42    int err = fseeko(mFile, offset, SEEK_SET);
43    assert(err != -1);
44
45    ssize_t result = fread(data, 1, size, mFile);
46
47    return result;
48}
49
50}  // namespace android
51