gecko-dev/dom/media/omx/MediaStreamSource.cpp

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