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1 /* 1 /*
2 * ALSA sequencer System services Client 2 * ALSA sequencer System services Client
3 * Copyright (c) 1998-1999 by Frank van de P 3 * Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
4 * 4 *
5 * 5 *
6 * This program is free software; you can re 6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Pub 7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either vers 8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version. 9 * (at your option) any later version.
10 * 10 *
11 * This program is distributed in the hope t 11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even th 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICUL 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more detai 14 * GNU General Public License for more details.
15 * 15 *
16 * You should have received a copy of the GN 16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to 17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 * 19 *
20 */ 20 */
21 21
22 #include <sound/driver.h> <<
23 #include <linux/init.h> 22 #include <linux/init.h>
24 #include <sound/core.h> 23 #include <sound/core.h>
25 #include "seq_system.h" 24 #include "seq_system.h"
26 #include "seq_timer.h" 25 #include "seq_timer.h"
27 #include "seq_queue.h" 26 #include "seq_queue.h"
28 27
29 /* internal client that provide system service 28 /* internal client that provide system services, access to timer etc. */
30 29
31 /* 30 /*
32 * Port "Timer" 31 * Port "Timer"
33 * - send tempo /start/stop etc. events t 32 * - send tempo /start/stop etc. events to this port to manipulate the
34 * queue's timer. The queue address is 33 * queue's timer. The queue address is specified in
35 * data.queue.queue. 34 * data.queue.queue.
36 * - this port supports subscription. The 35 * - this port supports subscription. The received timer events are
37 * broadcasted to all subscribed client 36 * broadcasted to all subscribed clients. The modified tempo
38 * value is stored on data.queue.value. 37 * value is stored on data.queue.value.
39 * The modifier client/port is not send 38 * The modifier client/port is not send.
40 * 39 *
41 * Port "Announce" 40 * Port "Announce"
42 * - does not receive message 41 * - does not receive message
43 * - supports supscription. For each clie 42 * - supports supscription. For each client or port attaching to or
44 * detaching from the system an announc 43 * detaching from the system an announcement is send to the subscribed
45 * clients. 44 * clients.
46 * 45 *
47 * Idea: the subscription mechanism might also 46 * Idea: the subscription mechanism might also work handy for distributing
48 * synchronisation and timing information. In 47 * synchronisation and timing information. In this case we would ideally have
49 * a list of subscribers for each type of sync 48 * a list of subscribers for each type of sync (time, tick), for each timing
50 * queue. 49 * queue.
51 * 50 *
52 * NOTE: the queue to be started, stopped, etc 51 * NOTE: the queue to be started, stopped, etc. must be specified
53 * in data.queue.addr.queue field. queu 52 * in data.queue.addr.queue field. queue is used only for
54 * scheduling, and no longer referred as 53 * scheduling, and no longer referred as affected queue.
55 * They are used only for timer broadcas 54 * They are used only for timer broadcast (see above).
56 * 55 * -- iwai
57 */ 56 */
58 57
59 58
60 /* client id of our system client */ 59 /* client id of our system client */
61 static int sysclient = -1; 60 static int sysclient = -1;
62 61
63 /* port id numbers for this client */ 62 /* port id numbers for this client */
64 static int announce_port = -1; 63 static int announce_port = -1;
65 64
66 65
67 66
68 /* fill standard header data, source port & ch 67 /* fill standard header data, source port & channel are filled in */
69 static int setheader(snd_seq_event_t * ev, int !! 68 static int setheader(struct snd_seq_event * ev, int client, int port)
70 { 69 {
71 if (announce_port < 0) 70 if (announce_port < 0)
72 return -ENODEV; 71 return -ENODEV;
73 72
74 memset(ev, 0, sizeof(snd_seq_event_t)) !! 73 memset(ev, 0, sizeof(struct snd_seq_event));
75 74
76 ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_M 75 ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
77 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FI 76 ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED;
78 77
79 ev->source.client = sysclient; 78 ev->source.client = sysclient;
80 ev->source.port = announce_port; 79 ev->source.port = announce_port;
81 ev->dest.client = SNDRV_SEQ_ADDRESS_SU 80 ev->dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
82 81
83 /* fill data */ 82 /* fill data */
84 /*ev->data.addr.queue = SNDRV_SEQ_ADDR 83 /*ev->data.addr.queue = SNDRV_SEQ_ADDRESS_UNKNOWN;*/
85 ev->data.addr.client = client; 84 ev->data.addr.client = client;
86 ev->data.addr.port = port; 85 ev->data.addr.port = port;
87 86
88 return 0; 87 return 0;
89 } 88 }
90 89
91 90
92 /* entry points for broadcasting system events 91 /* entry points for broadcasting system events */
93 void snd_seq_system_broadcast(int client, int 92 void snd_seq_system_broadcast(int client, int port, int type)
94 { 93 {
95 snd_seq_event_t ev; !! 94 struct snd_seq_event ev;
96 95
97 if (setheader(&ev, client, port) < 0) 96 if (setheader(&ev, client, port) < 0)
98 return; 97 return;
99 ev.type = type; 98 ev.type = type;
100 snd_seq_kernel_client_dispatch(sysclie 99 snd_seq_kernel_client_dispatch(sysclient, &ev, 0, 0);
101 } 100 }
102 101
103 /* entry points for broadcasting system events 102 /* entry points for broadcasting system events */
104 int snd_seq_system_notify(int client, int port !! 103 int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev)
105 { 104 {
106 ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIX 105 ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
107 ev->source.client = sysclient; 106 ev->source.client = sysclient;
108 ev->source.port = announce_port; 107 ev->source.port = announce_port;
109 ev->dest.client = client; 108 ev->dest.client = client;
110 ev->dest.port = port; 109 ev->dest.port = port;
111 return snd_seq_kernel_client_dispatch( 110 return snd_seq_kernel_client_dispatch(sysclient, ev, 0, 0);
112 } 111 }
113 112
114 /* call-back handler for timer events */ 113 /* call-back handler for timer events */
115 static int event_input_timer(snd_seq_event_t * !! 114 static int event_input_timer(struct snd_seq_event * ev, int direct, void *private_data, int atomic, int hop)
116 { 115 {
117 return snd_seq_control_queue(ev, atomi 116 return snd_seq_control_queue(ev, atomic, hop);
118 } 117 }
119 118
120 /* register our internal client */ 119 /* register our internal client */
121 int __init snd_seq_system_client_init(void) 120 int __init snd_seq_system_client_init(void)
122 { 121 {
>> 122 struct snd_seq_port_callback pcallbacks;
>> 123 struct snd_seq_port_info *port;
123 124
124 snd_seq_client_callback_t callbacks; !! 125 port = kzalloc(sizeof(*port), GFP_KERNEL);
125 snd_seq_port_callback_t pcallbacks; !! 126 if (!port)
126 snd_seq_client_info_t inf; !! 127 return -ENOMEM;
127 snd_seq_port_info_t port; <<
128 128
129 memset(&callbacks, 0, sizeof(callbacks <<
130 memset(&pcallbacks, 0, sizeof(pcallbac 129 memset(&pcallbacks, 0, sizeof(pcallbacks));
131 memset(&inf, 0, sizeof(inf)); <<
132 memset(&port, 0, sizeof(port)); <<
133 pcallbacks.owner = THIS_MODULE; 130 pcallbacks.owner = THIS_MODULE;
134 pcallbacks.event_input = event_input_t 131 pcallbacks.event_input = event_input_timer;
135 132
136 /* register client */ 133 /* register client */
137 callbacks.allow_input = callbacks.allo !! 134 sysclient = snd_seq_create_kernel_client(NULL, 0, "System");
138 sysclient = snd_seq_create_kernel_clie <<
139 <<
140 /* set our name */ <<
141 inf.client = 0; <<
142 inf.type = KERNEL_CLIENT; <<
143 strcpy(inf.name, "System"); <<
144 snd_seq_kernel_client_ctl(sysclient, S <<
145 135
146 /* register timer */ 136 /* register timer */
147 strcpy(port.name, "Timer"); !! 137 strcpy(port->name, "Timer");
148 port.capability = SNDRV_SEQ_PORT_CAP_W !! 138 port->capability = SNDRV_SEQ_PORT_CAP_WRITE; /* accept queue control */
149 port.capability |= SNDRV_SEQ_PORT_CAP_ !! 139 port->capability |= SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ; /* for broadcast */
150 port.kernel = &pcallbacks; !! 140 port->kernel = &pcallbacks;
151 port.type = 0; !! 141 port->type = 0;
152 port.flags = SNDRV_SEQ_PORT_FLG_GIVEN_ !! 142 port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT;
153 port.addr.client = sysclient; !! 143 port->addr.client = sysclient;
154 port.addr.port = SNDRV_SEQ_PORT_SYSTEM !! 144 port->addr.port = SNDRV_SEQ_PORT_SYSTEM_TIMER;
155 snd_seq_kernel_client_ctl(sysclient, S !! 145 snd_seq_kernel_client_ctl(sysclient, SNDRV_SEQ_IOCTL_CREATE_PORT, port);
156 146
157 /* register announcement port */ 147 /* register announcement port */
158 strcpy(port.name, "Announce"); !! 148 strcpy(port->name, "Announce");
159 port.capability = SNDRV_SEQ_PORT_CAP_R !! 149 port->capability = SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ; /* for broadcast only */
160 port.kernel = NULL; !! 150 port->kernel = NULL;
161 port.type = 0; !! 151 port->type = 0;
162 port.flags = SNDRV_SEQ_PORT_FLG_GIVEN_ !! 152 port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT;
163 port.addr.client = sysclient; !! 153 port->addr.client = sysclient;
164 port.addr.port = SNDRV_SEQ_PORT_SYSTEM !! 154 port->addr.port = SNDRV_SEQ_PORT_SYSTEM_ANNOUNCE;
165 snd_seq_kernel_client_ctl(sysclient, S !! 155 snd_seq_kernel_client_ctl(sysclient, SNDRV_SEQ_IOCTL_CREATE_PORT, port);
166 announce_port = port.addr.port; !! 156 announce_port = port->addr.port;
167 157
>> 158 kfree(port);
168 return 0; 159 return 0;
169 } 160 }
170 161
171 162
172 /* unregister our internal client */ 163 /* unregister our internal client */
173 void __exit snd_seq_system_client_done(void) 164 void __exit snd_seq_system_client_done(void)
174 { 165 {
175 int oldsysclient = sysclient; 166 int oldsysclient = sysclient;
176 167
177 if (oldsysclient >= 0) { 168 if (oldsysclient >= 0) {
178 sysclient = -1; 169 sysclient = -1;
179 announce_port = -1; 170 announce_port = -1;
180 snd_seq_delete_kernel_client(o 171 snd_seq_delete_kernel_client(oldsysclient);
181 } 172 }
182 } 173 }
183 174
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