зеркало из https://github.com/mozilla/gecko-dev.git
65 строки
1.4 KiB
C++
65 строки
1.4 KiB
C++
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
||
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
||
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
||
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
||
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
|
|
||
|
|
#include "MediaStreamSource.h"
|
||
|
|
|
||
|
|
#include <utils/threads.h>
|
||
|
|
|
||
|
|
#include "nsISeekableStream.h"
|
||
|
|
|
||
|
|
namespace android {
|
||
|
|
|
||
|
|
MediaStreamSource::MediaStreamSource(MediaResource *aResource)
|
||
|
|
: mResource(aResource)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
MediaStreamSource::~MediaStreamSource()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t MediaStreamSource::initCheck() const
|
||
|
|
{
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
ssize_t MediaStreamSource::readAt(off64_t offset, void *data, size_t size)
|
||
|
|
{
|
||
|
|
char *ptr = static_cast<char *>(data);
|
||
|
|
size_t todo = size;
|
||
|
|
while (todo > 0) {
|
||
|
|
Mutex::Autolock autoLock(mLock);
|
||
|
|
uint32_t bytesRead;
|
||
|
|
if ((offset != mResource->Tell() &&
|
||
|
|
NS_FAILED(mResource->Seek(nsISeekableStream::NS_SEEK_SET, offset))) ||
|
||
|
|
NS_FAILED(mResource->Read(ptr, todo, &bytesRead))) {
|
||
|
|
return ERROR_IO;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bytesRead == 0) {
|
||
|
|
return size - todo;
|
||
|
|
}
|
||
|
|
|
||
|
|
offset += bytesRead;
|
||
|
|
todo -= bytesRead;
|
||
|
|
ptr += bytesRead;
|
||
|
|
}
|
||
|
|
return size;
|
||
|
|
}
|
||
|
|
|
||
|
|
status_t MediaStreamSource::getSize(off64_t *size)
|
||
|
|
{
|
||
|
|
uint64_t length = mResource->GetLength();
|
||
|
|
if (length == static_cast<uint64_t>(-1))
|
||
|
|
return ERROR_UNSUPPORTED;
|
||
|
|
|
||
|
|
*size = length;
|
||
|
|
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace android
|