summaryrefslogtreecommitdiff
path: root/include/sound/rawmidi.h
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/sound/rawmidi.h
Initial import
Diffstat (limited to 'include/sound/rawmidi.h')
-rw-r--r--include/sound/rawmidi.h189
1 files changed, 189 insertions, 0 deletions
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
new file mode 100644
index 000000000..f6cbef78d
--- /dev/null
+++ b/include/sound/rawmidi.h
@@ -0,0 +1,189 @@
+#ifndef __SOUND_RAWMIDI_H
+#define __SOUND_RAWMIDI_H
+
+/*
+ * Abstract layer for MIDI v1.0 stream
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * 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 <sound/asound.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+
+#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
+#include <sound/seq_device.h>
+#endif
+
+/*
+ * Raw MIDI interface
+ */
+
+#define SNDRV_RAWMIDI_DEVICES 8
+
+#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
+#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
+#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
+#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
+
+struct snd_rawmidi;
+struct snd_rawmidi_substream;
+struct snd_seq_port_info;
+struct pid;
+
+struct snd_rawmidi_ops {
+ int (*open) (struct snd_rawmidi_substream * substream);
+ int (*close) (struct snd_rawmidi_substream * substream);
+ void (*trigger) (struct snd_rawmidi_substream * substream, int up);
+ void (*drain) (struct snd_rawmidi_substream * substream);
+};
+
+struct snd_rawmidi_global_ops {
+ int (*dev_register) (struct snd_rawmidi * rmidi);
+ int (*dev_unregister) (struct snd_rawmidi * rmidi);
+ void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
+ struct snd_seq_port_info *info);
+};
+
+struct snd_rawmidi_runtime {
+ struct snd_rawmidi_substream *substream;
+ unsigned int drain: 1, /* drain stage */
+ oss: 1; /* OSS compatible mode */
+ /* midi stream buffer */
+ unsigned char *buffer; /* buffer for MIDI data */
+ size_t buffer_size; /* size of buffer */
+ size_t appl_ptr; /* application pointer */
+ size_t hw_ptr; /* hardware pointer */
+ size_t avail_min; /* min avail for wakeup */
+ size_t avail; /* max used buffer for wakeup */
+ size_t xruns; /* over/underruns counter */
+ /* misc */
+ spinlock_t lock;
+ wait_queue_head_t sleep;
+ /* event handler (new bytes, input only) */
+ void (*event)(struct snd_rawmidi_substream *substream);
+ /* defers calls to event [input] or ops->trigger [output] */
+ struct work_struct event_work;
+ /* private data */
+ void *private_data;
+ void (*private_free)(struct snd_rawmidi_substream *substream);
+};
+
+struct snd_rawmidi_substream {
+ struct list_head list; /* list of all substream for given stream */
+ int stream; /* direction */
+ int number; /* substream number */
+ unsigned int opened: 1, /* open flag */
+ append: 1, /* append flag (merge more streams) */
+ active_sensing: 1; /* send active sensing when close */
+ int use_count; /* use counter (for output) */
+ size_t bytes;
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_str *pstr;
+ char name[32];
+ struct snd_rawmidi_runtime *runtime;
+ struct pid *pid;
+ /* hardware layer */
+ struct snd_rawmidi_ops *ops;
+};
+
+struct snd_rawmidi_file {
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_substream *input;
+ struct snd_rawmidi_substream *output;
+};
+
+struct snd_rawmidi_str {
+ unsigned int substream_count;
+ unsigned int substream_opened;
+ struct list_head substreams;
+};
+
+struct snd_rawmidi {
+ struct snd_card *card;
+ struct list_head list;
+ unsigned int device; /* device number */
+ unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
+ char id[64];
+ char name[80];
+
+#ifdef CONFIG_SND_OSSEMUL
+ int ossreg;
+#endif
+
+ struct snd_rawmidi_global_ops *ops;
+
+ struct snd_rawmidi_str streams[2];
+
+ void *private_data;
+ void (*private_free) (struct snd_rawmidi *rmidi);
+
+ struct mutex open_mutex;
+ wait_queue_head_t open_wait;
+
+ struct device dev;
+
+ struct snd_info_entry *proc_entry;
+
+#if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
+ struct snd_seq_device *seq_dev;
+#endif
+};
+
+/* main rawmidi functions */
+
+int snd_rawmidi_new(struct snd_card *card, char *id, int device,
+ int output_count, int input_count,
+ struct snd_rawmidi **rmidi);
+void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
+ struct snd_rawmidi_ops *ops);
+
+/* callbacks */
+
+int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
+ const unsigned char *buffer, int count);
+int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
+ unsigned char *buffer, int count);
+int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
+int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
+ unsigned char *buffer, int count);
+
+/* main midi functions */
+
+int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
+int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
+ int mode, struct snd_rawmidi_file *rfile);
+int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
+int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
+ struct snd_rawmidi_params *params);
+int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
+ struct snd_rawmidi_params *params);
+int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
+long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
+ unsigned char *buf, long count);
+long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
+ const unsigned char *buf, long count);
+
+#endif /* __SOUND_RAWMIDI_H */