1 #ifndef __SOUND_RAWMIDI_H
2 #define __SOUND_RAWMIDI_H
5 * Abstract layer for MIDI v1.0 stream
6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <sound/asound.h>
26 #include <linux/interrupt.h>
27 #include <linux/spinlock.h>
28 #include <linux/wait.h>
29 #include <linux/mutex.h>
30 #include <linux/workqueue.h>
32 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
33 #include <sound/seq_device.h>
40 #define SNDRV_RAWMIDI_DEVICES 8
42 #define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
43 #define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
44 #define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
45 #define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
48 struct snd_rawmidi_substream;
49 struct snd_seq_port_info;
52 struct snd_rawmidi_ops {
53 int (*open) (struct snd_rawmidi_substream * substream);
54 int (*close) (struct snd_rawmidi_substream * substream);
55 void (*trigger) (struct snd_rawmidi_substream * substream, int up);
56 void (*drain) (struct snd_rawmidi_substream * substream);
59 struct snd_rawmidi_global_ops {
60 int (*dev_register) (struct snd_rawmidi * rmidi);
61 int (*dev_unregister) (struct snd_rawmidi * rmidi);
62 void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
63 struct snd_seq_port_info *info);
66 struct snd_rawmidi_runtime {
67 struct snd_rawmidi_substream *substream;
68 unsigned int drain: 1, /* drain stage */
69 oss: 1; /* OSS compatible mode */
70 /* midi stream buffer */
71 unsigned char *buffer; /* buffer for MIDI data */
72 size_t buffer_size; /* size of buffer */
73 size_t appl_ptr; /* application pointer */
74 size_t hw_ptr; /* hardware pointer */
75 size_t avail_min; /* min avail for wakeup */
76 size_t avail; /* max used buffer for wakeup */
77 size_t xruns; /* over/underruns counter */
80 wait_queue_head_t sleep;
81 /* event handler (new bytes, input only) */
82 void (*event)(struct snd_rawmidi_substream *substream);
83 /* defers calls to event [input] or ops->trigger [output] */
84 struct work_struct event_work;
87 void (*private_free)(struct snd_rawmidi_substream *substream);
90 struct snd_rawmidi_substream {
91 struct list_head list; /* list of all substream for given stream */
92 int stream; /* direction */
93 int number; /* substream number */
94 unsigned int opened: 1, /* open flag */
95 append: 1, /* append flag (merge more streams) */
96 active_sensing: 1; /* send active sensing when close */
97 int use_count; /* use counter (for output) */
99 struct snd_rawmidi *rmidi;
100 struct snd_rawmidi_str *pstr;
102 struct snd_rawmidi_runtime *runtime;
105 struct snd_rawmidi_ops *ops;
108 struct snd_rawmidi_file {
109 struct snd_rawmidi *rmidi;
110 struct snd_rawmidi_substream *input;
111 struct snd_rawmidi_substream *output;
114 struct snd_rawmidi_str {
115 unsigned int substream_count;
116 unsigned int substream_opened;
117 struct list_head substreams;
121 struct snd_card *card;
122 struct list_head list;
123 unsigned int device; /* device number */
124 unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
128 #ifdef CONFIG_SND_OSSEMUL
132 struct snd_rawmidi_global_ops *ops;
134 struct snd_rawmidi_str streams[2];
137 void (*private_free) (struct snd_rawmidi *rmidi);
139 struct mutex open_mutex;
140 wait_queue_head_t open_wait;
142 struct snd_info_entry *dev;
143 struct snd_info_entry *proc_entry;
145 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
146 struct snd_seq_device *seq_dev;
150 /* main rawmidi functions */
152 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
153 int output_count, int input_count,
154 struct snd_rawmidi **rmidi);
155 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
156 struct snd_rawmidi_ops *ops);
160 void snd_rawmidi_receive_reset(struct snd_rawmidi_substream *substream);
161 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
162 const unsigned char *buffer, int count);
163 void snd_rawmidi_transmit_reset(struct snd_rawmidi_substream *substream);
164 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
165 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
166 unsigned char *buffer, int count);
167 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
168 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
169 unsigned char *buffer, int count);
171 /* main midi functions */
173 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
174 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
175 int mode, struct snd_rawmidi_file *rfile);
176 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
177 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
178 struct snd_rawmidi_params *params);
179 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
180 struct snd_rawmidi_params *params);
181 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
182 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
183 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
184 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
185 unsigned char *buf, long count);
186 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
187 const unsigned char *buf, long count);
189 #endif /* __SOUND_RAWMIDI_H */