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72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MediaStreamSource.h"
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#include <utils/threads.h>
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#include "nsISeekableStream.h"
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namespace android {
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MediaStreamSource::MediaStreamSource(MediaResource *aResource)
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: mResource(aResource)
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{
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}
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MediaStreamSource::~MediaStreamSource()
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{
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}
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status_t MediaStreamSource::initCheck() const
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{
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return OK;
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}
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ssize_t MediaStreamSource::readAt(off64_t offset, void *data, size_t size)
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{
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char *ptr = static_cast<char *>(data);
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size_t todo = size;
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while (todo > 0) {
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Mutex::Autolock autoLock(mLock);
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uint32_t bytesRead;
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if ((offset != mResource.Tell() &&
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NS_FAILED(mResource.Seek(nsISeekableStream::NS_SEEK_SET, offset))) ||
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NS_FAILED(mResource.Read(ptr, todo, &bytesRead))) {
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return ERROR_IO;
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}
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if (bytesRead == 0) {
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return size - todo;
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}
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offset += bytesRead;
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todo -= bytesRead;
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ptr += bytesRead;
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}
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return size;
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}
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status_t MediaStreamSource::getSize(off64_t *size)
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{
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uint64_t length = mResource.GetLength();
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if (length == static_cast<uint64_t>(-1))
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return ERROR_UNSUPPORTED;
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*size = length;
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return OK;
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}
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int64_t
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MediaStreamSource::Tell()
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{
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Mutex::Autolock autoLock(mLock);
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return mResource.Tell();
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}
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} // namespace android
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