3888ef2f55
When the decoder thread has a pending command, send the STOP command to cancel this command. Send STOP again if the decoder thread is still running after that, just in case the decoder thread has executed the previous command (which was overwritten).
125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
/*
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* Copyright (C) 2003-2009 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 "decoder_control.h"
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#include <assert.h>
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struct decoder_control dc;
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void dc_init(void)
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{
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notify_init(&dc.notify);
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dc.state = DECODE_STATE_STOP;
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dc.command = DECODE_COMMAND_NONE;
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}
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void dc_deinit(void)
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{
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notify_deinit(&dc.notify);
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}
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void
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dc_command_wait(struct notify *notify)
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{
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while (dc.command != DECODE_COMMAND_NONE) {
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notify_signal(&dc.notify);
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notify_wait(notify);
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}
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}
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static void
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dc_command(struct notify *notify, enum decoder_command cmd)
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{
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dc.command = cmd;
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dc_command_wait(notify);
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}
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static void dc_command_async(enum decoder_command cmd)
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{
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dc.command = cmd;
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notify_signal(&dc.notify);
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}
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void
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dc_start(struct notify *notify, struct song *song)
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{
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assert(dc.pipe != NULL);
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assert(song != NULL);
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dc.next_song = song;
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dc_command(notify, DECODE_COMMAND_START);
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}
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void
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dc_start_async(struct song *song)
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{
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assert(dc.pipe != NULL);
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assert(song != NULL);
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dc.next_song = song;
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dc_command_async(DECODE_COMMAND_START);
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}
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void
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dc_stop(struct notify *notify)
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{
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if (dc.command != DECODE_COMMAND_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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dc_command(notify, DECODE_COMMAND_STOP);
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if (dc.state != DECODE_STATE_STOP && dc.state != DECODE_STATE_ERROR)
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dc_command(notify, DECODE_COMMAND_STOP);
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}
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bool
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dc_seek(struct notify *notify, double where)
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{
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assert(dc.state != DECODE_STATE_START);
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assert(where >= 0.0);
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if (dc.state == DECODE_STATE_STOP ||
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dc.state == DECODE_STATE_ERROR || !dc.seekable)
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return false;
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dc.seek_where = where;
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dc.seek_error = false;
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dc_command(notify, DECODE_COMMAND_SEEK);
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if (dc.seek_error)
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return false;
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return true;
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}
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void
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dc_quit(void)
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{
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assert(dc.thread != NULL);
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dc.quit = true;
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dc_command_async(DECODE_COMMAND_STOP);
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g_thread_join(dc.thread);
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dc.thread = NULL;
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}
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