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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "playerData.h"
#include "conf.h"
#include "log.h"
#include "os_compat.h"
unsigned int buffered_before_play;
unsigned int buffered_chunks;
#define DEFAULT_BUFFER_SIZE 2048
#define DEFAULT_BUFFER_BEFORE_PLAY 10
static PlayerData *playerData_pd;
void initPlayerData(void)
{
float perc = DEFAULT_BUFFER_BEFORE_PLAY;
char *test;
int shmid;
int crossfade = 0;
size_t bufferSize = DEFAULT_BUFFER_SIZE;
size_t allocationSize;
ConfigParam *param;
size_t device_array_size = audio_device_count() * sizeof(mpd_sint8);
param = getConfigParam(CONF_AUDIO_BUFFER_SIZE);
if (param) {
bufferSize = strtol(param->value, &test, 10);
if (*test != '\0' || bufferSize <= 0) {
FATAL("buffer size \"%s\" is not a positive integer, "
"line %i\n", param->value, param->line);
}
}
bufferSize *= 1024;
buffered_chunks = bufferSize / CHUNK_SIZE;
if (buffered_chunks >= 1 << 15) {
FATAL("buffer size \"%li\" is too big\n", (long)bufferSize);
}
param = getConfigParam(CONF_BUFFER_BEFORE_PLAY);
if (param) {
perc = strtod(param->value, &test);
if (*test != '%' || perc < 0 || perc > 100) {
FATAL("buffered before play \"%s\" is not a positive "
"percentage and less than 100 percent, line %i"
"\n", param->value, param->line);
}
}
buffered_before_play = (perc / 100) * buffered_chunks;
if (buffered_before_play > buffered_chunks) {
buffered_before_play = buffered_chunks;
}
allocationSize = buffered_chunks * CHUNK_SIZE; /*actual buffer */
allocationSize += buffered_chunks * sizeof(float); /*for times */
allocationSize += buffered_chunks * sizeof(mpd_sint16); /*for chunkSize */
allocationSize += buffered_chunks * sizeof(mpd_sint16); /*for bitRate */
allocationSize += sizeof(PlayerData); /*for playerData struct */
/* for audioDeviceStates[] */
allocationSize += device_array_size;
if ((shmid = shmget(IPC_PRIVATE, allocationSize, IPC_CREAT | 0600)) < 0)
FATAL("problems shmget'ing\n");
if (!(playerData_pd = shmat(shmid, NULL, 0)))
FATAL("problems shmat'ing\n");
if (shmctl(shmid, IPC_RMID, NULL) < 0)
FATAL("problems shmctl'ing\n");
playerData_pd->audioDeviceStates = (mpd_uint8 *)playerData_pd +
allocationSize - device_array_size;
initOutputBuffer(&(playerData_pd->buffer),
((char *)playerData_pd) + sizeof(PlayerData));
playerData_pd->playerControl.stop = 0;
playerData_pd->playerControl.pause = 0;
playerData_pd->playerControl.play = 0;
playerData_pd->playerControl.error = PLAYER_ERROR_NOERROR;
playerData_pd->playerControl.lockQueue = 0;
playerData_pd->playerControl.unlockQueue = 0;
playerData_pd->playerControl.state = PLAYER_STATE_STOP;
playerData_pd->playerControl.queueState = PLAYER_QUEUE_BLANK;
playerData_pd->playerControl.queueLockState = PLAYER_QUEUE_UNLOCKED;
playerData_pd->playerControl.seek = 0;
playerData_pd->playerControl.closeAudio = 0;
playerData_pd->playerControl.current_song = NULL;
playerData_pd->playerControl.errored_song = NULL;
playerData_pd->playerControl.crossFade = crossfade;
playerData_pd->playerControl.softwareVolume = 1000;
playerData_pd->playerControl.totalPlayTime = 0;
playerData_pd->decoderControl.stop = 0;
playerData_pd->decoderControl.start = 0;
playerData_pd->decoderControl.state = DECODE_STATE_STOP;
playerData_pd->decoderControl.seek = 0;
playerData_pd->decoderControl.error = DECODE_ERROR_NOERROR;
playerData_pd->decoderControl.current_song = NULL;
}
PlayerData *getPlayerData(void)
{
return playerData_pd;
}
void freePlayerData(void)
{
/* We don't want to release this memory until we know our player and
* decoder have exited. Otherwise, their signal handlers will want to
* access playerData_pd and we need to keep it available for them */
waitpid(-1, NULL, 0);
shmdt(playerData_pd);
}
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