149 lines
3.2 KiB
C
149 lines
3.2 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 "player_control.h"
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#include <assert.h>
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void
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dc_init(struct decoder_control *dc)
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{
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dc->thread = NULL;
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dc->mutex = g_mutex_new();
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dc->cond = g_cond_new();
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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
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dc_deinit(struct decoder_control *dc)
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{
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g_cond_free(dc->cond);
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g_mutex_free(dc->mutex);
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}
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static void
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dc_command_wait_locked(struct decoder_control *dc)
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{
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while (dc->command != DECODE_COMMAND_NONE)
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player_wait_decoder(dc);
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}
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void
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dc_command_wait(struct decoder_control *dc)
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{
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decoder_lock(dc);
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dc_command_wait_locked(dc);
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decoder_unlock(dc);
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}
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static void
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dc_command_locked(struct decoder_control *dc, enum decoder_command cmd)
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{
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dc->command = cmd;
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decoder_signal(dc);
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dc_command_wait_locked(dc);
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}
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static void
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dc_command(struct decoder_control *dc, enum decoder_command cmd)
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{
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decoder_lock(dc);
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dc_command_locked(dc, cmd);
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decoder_unlock(dc);
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}
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static void
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dc_command_async(struct decoder_control *dc, enum decoder_command cmd)
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{
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decoder_lock(dc);
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dc->command = cmd;
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decoder_signal(dc);
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decoder_unlock(dc);
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}
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void
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dc_start(struct decoder_control *dc, struct song *song,
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struct music_buffer *buffer, struct music_pipe *pipe)
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{
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assert(song != NULL);
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assert(buffer != NULL);
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assert(pipe != NULL);
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dc->song = song;
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dc->buffer = buffer;
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dc->pipe = pipe;
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dc_command(dc, DECODE_COMMAND_START);
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}
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void
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dc_stop(struct decoder_control *dc)
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{
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decoder_lock(dc);
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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_locked(dc, DECODE_COMMAND_STOP);
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if (dc->state != DECODE_STATE_STOP && dc->state != DECODE_STATE_ERROR)
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dc_command_locked(dc, DECODE_COMMAND_STOP);
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decoder_unlock(dc);
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}
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bool
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dc_seek(struct decoder_control *dc, 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(dc, 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(struct decoder_control *dc)
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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(dc, 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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