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/*
* Copyright 2003-2020 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 "InputStream.hxx"
#include "Handler.hxx"
#include "tag/Tag.hxx"
#include "util/ASCII.hxx"
#include <stdexcept>
#include <assert.h>
InputStream::~InputStream() noexcept = default;
void
InputStream::Check()
{
}
void
InputStream::Update() noexcept
{
}
void
InputStream::SetReady() noexcept
{
assert(!ready);
ready = true;
InvokeOnReady();
}
/**
* Is seeking on resources behind this URI "expensive"? For example,
* seeking in a HTTP file requires opening a new connection with a new
* HTTP request.
*/
gcc_pure
static bool
ExpensiveSeeking(const char *uri) noexcept
{
return StringStartsWithCaseASCII(uri, "http://") ||
StringStartsWithCaseASCII(uri, "tidal://") ||
StringStartsWithCaseASCII(uri, "qobuz://") ||
StringStartsWithCaseASCII(uri, "https://");
}
bool
InputStream::CheapSeeking() const noexcept
{
return IsSeekable() && !ExpensiveSeeking(uri.c_str());
}
void
InputStream::Seek(std::unique_lock<Mutex> &, gcc_unused offset_type new_offset)
{
throw std::runtime_error("Seeking is not implemented");
}
void
InputStream::LockSeek(offset_type _offset)
{
std::unique_lock<Mutex> lock(mutex);
Seek(lock, _offset);
}
void
InputStream::LockSkip(offset_type _offset)
{
std::unique_lock<Mutex> lock(mutex);
Skip(lock, _offset);
}
std::unique_ptr<Tag>
InputStream::ReadTag() noexcept
{
return nullptr;
}
std::unique_ptr<Tag>
InputStream::LockReadTag() noexcept
{
const std::lock_guard<Mutex> protect(mutex);
return ReadTag();
}
bool
InputStream::IsAvailable() const noexcept
{
return true;
}
size_t
InputStream::LockRead(void *ptr, size_t _size)
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(ptr != nullptr);
#endif
assert(_size > 0);
std::unique_lock<Mutex> lock(mutex);
return Read(lock, ptr, _size);
}
void
InputStream::ReadFull(std::unique_lock<Mutex> &lock, void *_ptr, size_t _size)
{
auto *ptr = (uint8_t *)_ptr;
size_t nbytes_total = 0;
while (_size > 0) {
size_t nbytes = Read(lock, ptr + nbytes_total, _size);
if (nbytes == 0)
throw std::runtime_error("Unexpected end of file");
nbytes_total += nbytes;
_size -= nbytes;
}
}
void
InputStream::LockReadFull(void *ptr, size_t _size)
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(ptr != nullptr);
#endif
assert(_size > 0);
std::unique_lock<Mutex> lock(mutex);
ReadFull(lock, ptr, _size);
}
bool
InputStream::LockIsEOF() const noexcept
{
const std::lock_guard<Mutex> protect(mutex);
return IsEOF();
}
void
InputStream::InvokeOnReady() noexcept
{
if (handler != nullptr)
handler->OnInputStreamReady();
}
void
InputStream::InvokeOnAvailable() noexcept
{
if (handler != nullptr)
handler->OnInputStreamAvailable();
}
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