146 lines
2.4 KiB
C++
146 lines
2.4 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "InputStream.hxx"
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#include "Handler.hxx"
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#include "tag/Tag.hxx"
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#include "util/ASCII.hxx"
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#include <cassert>
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#include <stdexcept>
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InputStream::~InputStream() noexcept = default;
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void
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InputStream::Check()
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{
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}
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void
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InputStream::Update() noexcept
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{
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}
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void
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InputStream::SetReady() noexcept
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{
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assert(!ready);
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ready = true;
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InvokeOnReady();
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}
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/**
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* Is seeking on resources behind this URI "expensive"? For example,
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* seeking in a HTTP file requires opening a new connection with a new
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* HTTP request.
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*/
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[[gnu::pure]]
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static bool
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ExpensiveSeeking(const char *uri) noexcept
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{
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return StringStartsWithCaseASCII(uri, "http://") ||
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StringStartsWithCaseASCII(uri, "qobuz://") ||
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StringStartsWithCaseASCII(uri, "https://");
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}
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bool
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InputStream::CheapSeeking() const noexcept
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{
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return IsSeekable() && !ExpensiveSeeking(uri.c_str());
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}
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//[[noreturn]]
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void
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InputStream::Seek(std::unique_lock<Mutex> &, [[maybe_unused]] offset_type new_offset)
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{
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throw std::runtime_error("Seeking is not implemented");
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}
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void
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InputStream::LockSeek(offset_type _offset)
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{
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std::unique_lock lock{mutex};
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Seek(lock, _offset);
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}
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void
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InputStream::LockSkip(offset_type _offset)
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{
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std::unique_lock lock{mutex};
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Skip(lock, _offset);
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}
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std::unique_ptr<Tag>
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InputStream::ReadTag() noexcept
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{
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return nullptr;
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}
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std::unique_ptr<Tag>
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InputStream::LockReadTag() noexcept
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{
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const std::scoped_lock protect{mutex};
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return ReadTag();
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}
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bool
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InputStream::IsAvailable() const noexcept
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{
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return true;
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}
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size_t
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InputStream::LockRead(std::span<std::byte> dest)
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{
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assert(!dest.empty());
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std::unique_lock lock{mutex};
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return Read(lock, dest);
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}
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void
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InputStream::ReadFull(std::unique_lock<Mutex> &lock, std::span<std::byte> dest)
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{
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assert(!dest.empty());
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do {
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std::size_t nbytes = Read(lock, dest);
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if (nbytes == 0)
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throw std::runtime_error("Unexpected end of file");
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dest = dest.subspan(nbytes);
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} while (!dest.empty());
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}
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void
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InputStream::LockReadFull(std::span<std::byte> dest)
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{
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assert(!dest.empty());
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std::unique_lock lock{mutex};
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ReadFull(lock, dest);
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}
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bool
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InputStream::LockIsEOF() const noexcept
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{
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const std::scoped_lock protect{mutex};
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return IsEOF();
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}
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void
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InputStream::InvokeOnReady() noexcept
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{
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if (handler != nullptr)
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handler->OnInputStreamReady();
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}
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void
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InputStream::InvokeOnAvailable() noexcept
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{
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if (handler != nullptr)
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handler->OnInputStreamAvailable();
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}
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