gstreamer/subprojects/gst-plugins-base/ext/alsa/gstalsamidisrc.h

78 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 queue;
int port_count;
snd_seq_addr_t *seq_ports;
snd_midi_event_t *parser;
unsigned char *buffer;
GstPoll *poll;
guint64 tick;
guint64 delay;
};
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__ */