aboutsummaryrefslogtreecommitdiffstats
path: root/src/playerData.c
blob: 3261d444aeee257f77883498ff1c85949ad6deca (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/* 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 * sizeof(OutputBufferChunk);	/*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),
			 (OutputBufferChunk*)(((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;

	notifyInit(&playerData_pd->decoderControl.notify);
	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);
}