FileSource.cpp revision 34769bc913e9f6bb138e666d94a9d685bf3da217 
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#include <media/stagefright/MediaDebug.h>
19
20namespace android {
21
22FileSource::FileSource(const char *filename)
23    : mFile(fopen(filename, "rb")) {
24}
25
26FileSource::~FileSource() {
27    if (mFile != NULL) {
28        fclose(mFile);
29        mFile = NULL;
30    }
31}
32
33status_t FileSource::initCheck() const {
34    return mFile != NULL ? OK : NO_INIT;
35}
36
37ssize_t FileSource::readAt(off_t offset, void *data, size_t size) {
38    Mutex::Autolock autoLock(mLock);
39
40    int err = fseeko(mFile, offset, SEEK_SET);
41    CHECK(err != -1);
42
43    ssize_t result = fread(data, 1, size, mFile);
44
45    return result;
46}
47
48}  // namespace android
49