aboutsummaryrefslogtreecommitdiffstats
path: root/src/output/pulse_output_plugin.c
blob: 1b1c2757570a0e91764bb4b466290603bd003bf5 (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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*
 * Copyright (C) 2003-2009 The Music Player Daemon Project
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "output_api.h"
#include "mixer_list.h"

#include <glib.h>
#include <pulse/simple.h>
#include <pulse/error.h>

#define MPD_PULSE_NAME "Music Player Daemon"

struct pulse_data {
	const char *name;
	const char *server;
	const char *sink;

	pa_simple *s;
};

/**
 * The quark used for GError.domain.
 */
static inline GQuark
pulse_output_quark(void)
{
	return g_quark_from_static_string("pulse_output");
}

static struct pulse_data *pulse_new_data(void)
{
	struct pulse_data *ret;

	ret = g_new(struct pulse_data, 1);

	ret->server = NULL;
	ret->sink = NULL;

	return ret;
}

static void pulse_free_data(struct pulse_data *pd)
{
	g_free(pd);
}

static void *
pulse_init(G_GNUC_UNUSED const struct audio_format *audio_format,
	   const struct config_param *param, G_GNUC_UNUSED GError **error)
{
	struct pulse_data *pd;

	g_setenv("PULSE_PROP_media.role", "music", true);

	pd = pulse_new_data();
	pd->name = config_get_block_string(param, "name", "mpd_pulse");
	pd->server = config_get_block_string(param, "server", NULL);
	pd->sink = config_get_block_string(param, "sink", NULL);

	return pd;
}

static void pulse_finish(void *data)
{
	struct pulse_data *pd = data;

	pulse_free_data(pd);
}

static bool pulse_test_default_device(void)
{
	pa_simple *s;
	pa_sample_spec ss;
	int error;

	ss.format = PA_SAMPLE_S16NE;
	ss.rate = 44100;
	ss.channels = 2;

	s = pa_simple_new(NULL, MPD_PULSE_NAME, PA_STREAM_PLAYBACK, NULL,
			  MPD_PULSE_NAME, &ss, NULL, NULL, &error);
	if (!s) {
		g_message("Cannot connect to default PulseAudio server: %s\n",
			  pa_strerror(error));
		return false;
	}

	pa_simple_free(s);

	return true;
}

static bool
pulse_open(void *data, struct audio_format *audio_format, GError **error_r)
{
	struct pulse_data *pd = data;
	pa_sample_spec ss;
	int error;

	/* MPD doesn't support the other pulseaudio sample formats, so
	   we just force MPD to send us everything as 16 bit */
	audio_format->bits = 16;

	ss.format = PA_SAMPLE_S16NE;
	ss.rate = audio_format->sample_rate;
	ss.channels = audio_format->channels;

	pd->s = pa_simple_new(pd->server, MPD_PULSE_NAME, PA_STREAM_PLAYBACK,
			      pd->sink, pd->name,
			      &ss, NULL, NULL,
			      &error);
	if (!pd->s) {
		g_set_error(error_r, pulse_output_quark(), error,
			    "Cannot connect to PulseAudio server: %s",
			    pa_strerror(error));
		return false;
	}

	return true;
}

static void pulse_cancel(void *data)
{
	struct pulse_data *pd = data;
	int error;

	if (pa_simple_flush(pd->s, &error) < 0)
		g_warning("Flush failed in PulseAudio output \"%s\": %s\n",
			  pd->name, pa_strerror(error));
}

static void pulse_close(void *data)
{
	struct pulse_data *pd = data;

	pa_simple_drain(pd->s, NULL);
	pa_simple_free(pd->s);
}

static size_t
pulse_play(void *data, const void *chunk, size_t size, GError **error_r)
{
	struct pulse_data *pd = data;
	int error;

	if (pa_simple_write(pd->s, chunk, size, &error) < 0) {
		g_set_error(error_r, pulse_output_quark(), error,
			    "%s", pa_strerror(error));
		return 0;
	}

	return size;
}

const struct audio_output_plugin pulse_output_plugin = {
	.name = "pulse",

	.test_default_device = pulse_test_default_device,
	.init = pulse_init,
	.finish = pulse_finish,
	.open = pulse_open,
	.play = pulse_play,
	.cancel = pulse_cancel,
	.close = pulse_close,

	.mixer_plugin = &pulse_mixer_plugin,
};