mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-03 16:09:39 +00:00
2c7ed42292
The alsamidisrc element allows to get input event from ALSA MIDI sequencer devices, and possibly convert them to sound using some downstream element like fluiddec. Fixes #738687
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* GStreamer
|
|
* Copyright (C) 2014 Antonio Ospite <ao2@ao2.it>
|
|
*
|
|
* gstalsamidisrc.h: Source element for ALSA MIDI sequencer events
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __GST_ALSA_MIDI_SRC_H__
|
|
#define __GST_ALSA_MIDI_SRC_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstpushsrc.h>
|
|
|
|
#include <alsa/asoundlib.h>
|
|
|
|
G_BEGIN_DECLS
|
|
#define GST_TYPE_ALSA_MIDI_SRC \
|
|
(gst_alsa_midi_src_get_type())
|
|
#define GST_ALSA_MIDI_SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrc))
|
|
#define GST_ALSA_MIDI_SRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrcClass))
|
|
#define GST_IS_ALSA_MIDI_SRC(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIDI_SRC))
|
|
#define GST_IS_ALSA_MIDI_SRC_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIDI_SRC))
|
|
|
|
typedef struct _GstAlsaMidiSrc GstAlsaMidiSrc;
|
|
typedef struct _GstAlsaMidiSrcClass GstAlsaMidiSrcClass;
|
|
|
|
/**
|
|
* GstAlsaMidiSrc:
|
|
*
|
|
* Opaque #GstAlsaMidiSrc data structure.
|
|
*/
|
|
struct _GstAlsaMidiSrc
|
|
{
|
|
GstPushSrc element;
|
|
|
|
gchar *ports;
|
|
|
|
/*< private > */
|
|
snd_seq_t *seq;
|
|
int port_count;
|
|
snd_seq_addr_t *seq_ports;
|
|
snd_midi_event_t *parser;
|
|
unsigned char *buffer;
|
|
|
|
struct pollfd *pfds;
|
|
int npfds;
|
|
|
|
guint64 tick;
|
|
};
|
|
|
|
struct _GstAlsaMidiSrcClass
|
|
{
|
|
GstPushSrcClass parent_class;
|
|
};
|
|
|
|
G_GNUC_INTERNAL GType gst_alsa_midi_src_get_type (void);
|
|
|
|
G_END_DECLS
|
|
#endif /* __GST_ALSA_MIDI_SRC_H__ */
|