Split datasource out of libstagefright
into libdatasource, which contains:
DataSourceFactory
(Clear)FileSource
(Clear)MediaHTTP
DataURISource
HTTPBase
NuCachedSource2
This is needed to break a circular dependency in an upcoming CL.
Test: build, boot
Change-Id: I34d9937235c78f18f51b18945342a0743e209577
Merged-In: I34d9937235c78f18f51b18945342a0743e209577
diff --git a/media/libdatasource/ClearFileSource.cpp b/media/libdatasource/ClearFileSource.cpp
new file mode 100644
index 0000000..afafa23
--- /dev/null
+++ b/media/libdatasource/ClearFileSource.cpp
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "ClearFileSource"
+#include <utils/Log.h>
+
+#include <datasource/ClearFileSource.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/FoundationUtils.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+namespace android {
+
+ClearFileSource::ClearFileSource(const char *filename)
+ : mFd(-1),
+ mOffset(0),
+ mLength(-1),
+ mName("<null>") {
+
+ if (filename) {
+ mName = String8::format("FileSource(%s)", filename);
+ }
+ ALOGV("%s", filename);
+ mFd = open(filename, O_LARGEFILE | O_RDONLY);
+
+ if (mFd >= 0) {
+ mLength = lseek64(mFd, 0, SEEK_END);
+ } else {
+ ALOGE("Failed to open file '%s'. (%s)", filename, strerror(errno));
+ }
+}
+
+ClearFileSource::ClearFileSource(int fd, int64_t offset, int64_t length)
+ : mFd(fd),
+ mOffset(offset),
+ mLength(length),
+ mName("<null>") {
+ ALOGV("fd=%d (%s), offset=%lld, length=%lld",
+ fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
+
+ if (mOffset < 0) {
+ mOffset = 0;
+ }
+ if (mLength < 0) {
+ mLength = 0;
+ }
+ if (mLength > INT64_MAX - mOffset) {
+ mLength = INT64_MAX - mOffset;
+ }
+ struct stat s;
+ if (fstat(fd, &s) == 0) {
+ if (mOffset > s.st_size) {
+ mOffset = s.st_size;
+ mLength = 0;
+ }
+ if (mOffset + mLength > s.st_size) {
+ mLength = s.st_size - mOffset;
+ }
+ }
+ if (mOffset != offset || mLength != length) {
+ ALOGW("offset/length adjusted from %lld/%lld to %lld/%lld",
+ (long long) offset, (long long) length,
+ (long long) mOffset, (long long) mLength);
+ }
+
+ mName = String8::format(
+ "FileSource(fd(%s), %lld, %lld)",
+ nameForFd(fd).c_str(),
+ (long long) mOffset,
+ (long long) mLength);
+
+}
+
+ClearFileSource::~ClearFileSource() {
+ if (mFd >= 0) {
+ ::close(mFd);
+ mFd = -1;
+ }
+}
+
+status_t ClearFileSource::initCheck() const {
+ return mFd >= 0 ? OK : NO_INIT;
+}
+
+ssize_t ClearFileSource::readAt(off64_t offset, void *data, size_t size) {
+ if (mFd < 0) {
+ return NO_INIT;
+ }
+
+ Mutex::Autolock autoLock(mLock);
+ if (mLength >= 0) {
+ if (offset >= mLength) {
+ return 0; // read beyond EOF.
+ }
+ uint64_t numAvailable = mLength - offset;
+ if ((uint64_t)size > numAvailable) {
+ size = numAvailable;
+ }
+ }
+ return readAt_l(offset, data, size);
+}
+
+ssize_t ClearFileSource::readAt_l(off64_t offset, void *data, size_t size) {
+ off64_t result = lseek64(mFd, offset + mOffset, SEEK_SET);
+ if (result == -1) {
+ ALOGE("seek to %lld failed", (long long)(offset + mOffset));
+ return UNKNOWN_ERROR;
+ }
+
+ return ::read(mFd, data, size);
+}
+
+status_t ClearFileSource::getSize(off64_t *size) {
+ Mutex::Autolock autoLock(mLock);
+
+ if (mFd < 0) {
+ return NO_INIT;
+ }
+
+ *size = mLength;
+
+ return OK;
+}
+
+} // namespace android