FileSource::FileSource(int fd, int64_t offset, int64_t length)
: mFd(fd),
mOffset(offset),
mLength(length),
mName("<null>")
//mDecryptHandle(NULL),
//mDrmManagerClient(NULL),
//mDrmBufOffset(0),
//mDrmBufSize(0),
//mDrmBuf(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);
}
status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t length)
{
ALOGV("setDataSource fd=%d (%s), offset=%lld, length=%lld",
fd, nameForFd(fd).c_str(), (long long) offset, (long long) length);
Mutex::Autolock lock(mLock);
struct stat sb;
int ret = fstat(fd, &sb);
if (ret != 0) {
ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
return BAD_VALUE;
}
ALOGV("st_dev = %llu", static_cast<unsigned long long>(sb.st_dev));
ALOGV("st_mode = %u", sb.st_mode);
ALOGV("st_uid = %lu", static_cast<unsigned long>(sb.st_uid));
ALOGV("st_gid = %lu", static_cast<unsigned long>(sb.st_gid));
ALOGV("st_size = %llu", static_cast<unsigned long long>(sb.st_size));
if (offset >= sb.st_size) {
ALOGE("offset (%lld) bigger than file size (%llu)",
(long long)offset, (unsigned long long)sb.st_size);
return BAD_VALUE;
}
if (offset + length > sb.st_size) {
length = sb.st_size - offset;
ALOGV("calculated length = %lld", (long long)length);
}
player_type playerType =
MediaPlayerFactory::getPlayerType(NULL /* client */,
fd,
offset,
length);
ALOGV("player type = %d", playerType);
sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
if (p == NULL) {
return NO_INIT;
}
status_t status = p->setDataSource(fd, offset, length);
if (status == NO_ERROR) mRetriever = p;
return status;
}
