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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ProxyInputStream.hxx"
#include "tag/Tag.hxx"
#include <stdexcept>
ProxyInputStream::ProxyInputStream(InputStreamPtr _input) noexcept
:InputStream(_input->GetURI(), _input->mutex),
input(std::move(_input))
{
assert(input);
input->SetHandler(this);
}
ProxyInputStream::~ProxyInputStream() noexcept = default;
void
ProxyInputStream::SetInput(InputStreamPtr _input) noexcept
{
assert(!input);
assert(_input);
input = std::move(_input);
input->SetHandler(this);
/* this call wakes up client threads if the new input is
ready */
CopyAttributes();
set_input_cond.signal();
}
void
ProxyInputStream::CopyAttributes()
{
assert(input);
if (input->IsReady()) {
if (!IsReady()) {
if (input->HasMimeType())
SetMimeType(input->GetMimeType());
size = input->KnownSize()
? input->GetSize()
: UNKNOWN_SIZE;
seekable = input->IsSeekable();
SetReady();
}
offset = input->GetOffset();
}
}
void
ProxyInputStream::Check()
{
if (input)
input->Check();
}
void
ProxyInputStream::Update() noexcept
{
if (!input)
return;
input->Update();
CopyAttributes();
}
void
ProxyInputStream::Seek(offset_type new_offset)
{
while (!input)
set_input_cond.wait(mutex);
input->Seek(new_offset);
CopyAttributes();
}
bool
ProxyInputStream::IsEOF() noexcept
{
return input && input->IsEOF();
}
std::unique_ptr<Tag>
ProxyInputStream::ReadTag()
{
if (!input)
return nullptr;
return input->ReadTag();
}
bool
ProxyInputStream::IsAvailable() noexcept
{
return input && input->IsAvailable();
}
size_t
ProxyInputStream::Read(void *ptr, size_t read_size)
{
while (!input)
set_input_cond.wait(mutex);
size_t nbytes = input->Read(ptr, read_size);
CopyAttributes();
return nbytes;
}
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