0be5a6ab2b
Wake up the PlayerThread only if it is really waiting for the decoder. This greatly reduces the number of system calls in the DecoderThread.
146 lines
3.1 KiB
C++
146 lines
3.1 KiB
C++
/*
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* Copyright (C) 2003-2013 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 "config.h"
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#include "DecoderControl.hxx"
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#include "MusicPipe.hxx"
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#include "Song.hxx"
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#include <glib.h>
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#include <assert.h>
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DecoderControl::DecoderControl(Mutex &_mutex, Cond &_client_cond)
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:mutex(_mutex), client_cond(_client_cond),
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state(DecoderState::STOP),
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command(DecoderCommand::NONE),
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client_is_waiting(false),
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song(nullptr),
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replay_gain_db(0), replay_gain_prev_db(0) {}
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DecoderControl::~DecoderControl()
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{
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ClearError();
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if (song != nullptr)
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song->Free();
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}
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void
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DecoderControl::WaitForDecoder()
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{
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assert(!client_is_waiting);
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client_is_waiting = true;
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client_cond.wait(mutex);
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assert(client_is_waiting);
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client_is_waiting = false;
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}
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bool
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DecoderControl::IsCurrentSong(const Song &_song) const
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{
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switch (state) {
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case DecoderState::STOP:
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case DecoderState::ERROR:
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return false;
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case DecoderState::START:
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case DecoderState::DECODE:
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return SongEquals(*song, _song);
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}
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assert(false);
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gcc_unreachable();
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}
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void
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DecoderControl::Start(Song *_song,
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unsigned _start_ms, unsigned _end_ms,
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MusicBuffer &_buffer, MusicPipe &_pipe)
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{
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assert(_song != nullptr);
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assert(_pipe.IsEmpty());
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if (song != nullptr)
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song->Free();
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song = _song;
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start_ms = _start_ms;
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end_ms = _end_ms;
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buffer = &_buffer;
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pipe = &_pipe;
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LockSynchronousCommand(DecoderCommand::START);
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}
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void
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DecoderControl::Stop()
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{
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Lock();
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if (command != DecoderCommand::NONE)
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/* Attempt to cancel the current command. If it's too
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late and the decoder thread is already executing
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the old command, we'll call STOP again in this
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function (see below). */
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SynchronousCommandLocked(DecoderCommand::STOP);
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if (state != DecoderState::STOP && state != DecoderState::ERROR)
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SynchronousCommandLocked(DecoderCommand::STOP);
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Unlock();
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}
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bool
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DecoderControl::Seek(double where)
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{
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assert(state != DecoderState::START);
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assert(where >= 0.0);
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if (state == DecoderState::STOP ||
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state == DecoderState::ERROR || !seekable)
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return false;
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seek_where = where;
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seek_error = false;
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LockSynchronousCommand(DecoderCommand::SEEK);
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return !seek_error;
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}
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void
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DecoderControl::Quit()
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{
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assert(thread.IsDefined());
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quit = true;
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LockAsynchronousCommand(DecoderCommand::STOP);
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thread.Join();
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}
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void
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DecoderControl::CycleMixRamp()
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{
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previous_mix_ramp = std::move(mix_ramp);
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mix_ramp.Clear();
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}
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