| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <media/stagefright/FileSource.h> |
| #include <media/stagefright/MediaDebug.h> |
| |
| namespace android { |
| |
| FileSource::FileSource(const char *filename) |
| : mFile(fopen(filename, "rb")), |
| mOffset(0), |
| mLength(-1) { |
| } |
| |
| FileSource::FileSource(int fd, int64_t offset, int64_t length) |
| : mFile(fdopen(fd, "rb")), |
| mOffset(offset), |
| mLength(length) { |
| CHECK(offset >= 0); |
| CHECK(length >= 0); |
| } |
| |
| FileSource::~FileSource() { |
| if (mFile != NULL) { |
| fclose(mFile); |
| mFile = NULL; |
| } |
| } |
| |
| status_t FileSource::initCheck() const { |
| return mFile != NULL ? OK : NO_INIT; |
| } |
| |
| ssize_t FileSource::readAt(off_t offset, void *data, size_t size) { |
| Mutex::Autolock autoLock(mLock); |
| |
| if (mLength >= 0) { |
| if (offset >= mLength) { |
| return 0; // read beyond EOF. |
| } |
| int64_t numAvailable = mLength - offset; |
| if ((int64_t)size > numAvailable) { |
| size = numAvailable; |
| } |
| } |
| |
| int err = fseeko(mFile, offset + mOffset, SEEK_SET); |
| CHECK(err != -1); |
| |
| return fread(data, 1, size, mFile); |
| } |
| |
| status_t FileSource::getSize(off_t *size) { |
| if (mLength >= 0) { |
| *size = mLength; |
| |
| return OK; |
| } |
| |
| fseek(mFile, SEEK_END, 0); |
| *size = ftello(mFile); |
| |
| return OK; |
| } |
| |
| } // namespace android |