101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
/*
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* Copyright 2003-2022 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "MusicPipe.hxx"
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#include "MusicChunk.hxx"
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#include <cassert>
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#ifndef NDEBUG
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bool
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MusicPipe::Contains(const MusicChunk *chunk) const noexcept
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{
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const std::scoped_lock<Mutex> protect(mutex);
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for (const MusicChunk *i = head.get(); i != nullptr; i = i->next.get())
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if (i == chunk)
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return true;
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return false;
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}
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#endif
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MusicChunkPtr
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MusicPipe::Shift() noexcept
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{
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const std::scoped_lock<Mutex> protect(mutex);
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auto chunk = std::move(head);
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if (chunk != nullptr) {
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assert(!chunk->IsEmpty());
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head = std::move(chunk->next);
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--size;
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if (head == nullptr) {
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assert(size == 0);
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assert(tail_r == &chunk->next);
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tail_r = &head;
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} else {
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assert(size > 0);
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assert(tail_r != &chunk->next);
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}
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#ifndef NDEBUG
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if (size == 0)
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audio_format.Clear();
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#endif
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}
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return chunk;
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}
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void
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MusicPipe::Clear() noexcept
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{
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while (Shift()) {}
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}
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void
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MusicPipe::Push(MusicChunkPtr chunk) noexcept
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{
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assert(!chunk->IsEmpty());
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assert(chunk->length == 0 || chunk->audio_format.IsValid());
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const std::scoped_lock<Mutex> protect(mutex);
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assert(size > 0 || !audio_format.IsDefined());
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assert(!audio_format.IsDefined() ||
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chunk->CheckFormat(audio_format));
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#ifndef NDEBUG
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if (!audio_format.IsDefined() && chunk->length > 0)
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audio_format = chunk->audio_format;
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#endif
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chunk->next.reset();
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*tail_r = std::move(chunk);
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tail_r = &(*tail_r)->next;
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++size;
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}
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