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-rw-r--r--include/sound/seq_virmidi.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/sound/seq_virmidi.h b/include/sound/seq_virmidi.h
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+++ b/include/sound/seq_virmidi.h
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_SEQ_VIRMIDI_H
+#define __SOUND_SEQ_VIRMIDI_H
+
+/*
+ * Virtual Raw MIDI client on Sequencer
+ * Copyright (c) 2000 by Takashi Iwai <tiwai@suse.de>,
+ * Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <sound/rawmidi.h>
+#include <sound/seq_midi_event.h>
+
+/*
+ * device file instance:
+ * This instance is created at each time the midi device file is
+ * opened. Each instance has its own input buffer and MIDI parser
+ * (buffer), and is associated with the device instance.
+ */
+struct snd_virmidi {
+ struct list_head list;
+ int seq_mode;
+ int client;
+ int port;
+ bool trigger;
+ struct snd_midi_event *parser;
+ struct snd_seq_event event;
+ struct snd_virmidi_dev *rdev;
+ struct snd_rawmidi_substream *substream;
+ struct work_struct output_work;
+};
+
+#define SNDRV_VIRMIDI_SUBSCRIBE (1<<0)
+#define SNDRV_VIRMIDI_USE (1<<1)
+
+/*
+ * device record:
+ * Each virtual midi device has one device instance. It contains
+ * common information and the linked-list of opened files,
+ */
+struct snd_virmidi_dev {
+ struct snd_card *card; /* associated card */
+ struct snd_rawmidi *rmidi; /* rawmidi device */
+ int seq_mode; /* SNDRV_VIRMIDI_XXX */
+ int device; /* sequencer device */
+ int client; /* created/attached client */
+ int port; /* created/attached port */
+ unsigned int flags; /* SNDRV_VIRMIDI_* */
+ rwlock_t filelist_lock;
+ struct rw_semaphore filelist_sem;
+ struct list_head filelist;
+};
+
+/* sequencer mode:
+ * ATTACH = input/output events from midi device are routed to the
+ * attached sequencer port. sequencer port is not created
+ * by virmidi itself.
+ * the input to rawmidi must be processed by passing the
+ * incoming events via snd_virmidi_receive()
+ * DISPATCH = input/output events are routed to subscribers.
+ * sequencer port is created in virmidi.
+ */
+#define SNDRV_VIRMIDI_SEQ_NONE 0
+#define SNDRV_VIRMIDI_SEQ_ATTACH 1
+#define SNDRV_VIRMIDI_SEQ_DISPATCH 2
+
+int snd_virmidi_new(struct snd_card *card, int device, struct snd_rawmidi **rrmidi);
+
+#endif /* __SOUND_SEQ_VIRMIDI */