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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
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* GStreamer
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* Copyright (C) 2014 Antonio Ospite <ao2@ao2.it>
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*
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* gstalsamidisrc.h: Source element for ALSA MIDI sequencer events
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_ALSA_MIDI_SRC_H__
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#define __GST_ALSA_MIDI_SRC_H__
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#include <gst/gst.h>
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#include <gst/base/gstpushsrc.h>
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#include <alsa/asoundlib.h>
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G_BEGIN_DECLS
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#define GST_TYPE_ALSA_MIDI_SRC \
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(gst_alsa_midi_src_get_type())
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#define GST_ALSA_MIDI_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrc))
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#define GST_ALSA_MIDI_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrcClass))
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#define GST_IS_ALSA_MIDI_SRC(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIDI_SRC))
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#define GST_IS_ALSA_MIDI_SRC_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIDI_SRC))
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typedef struct _GstAlsaMidiSrc GstAlsaMidiSrc;
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typedef struct _GstAlsaMidiSrcClass GstAlsaMidiSrcClass;
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/**
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* GstAlsaMidiSrc:
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*
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* Opaque #GstAlsaMidiSrc data structure.
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*/
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struct _GstAlsaMidiSrc
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{
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GstPushSrc element;
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gchar *ports;
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/*< private > */
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snd_seq_t *seq;
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int port_count;
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snd_seq_addr_t *seq_ports;
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snd_midi_event_t *parser;
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unsigned char *buffer;
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struct pollfd *pfds;
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int npfds;
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guint64 tick;
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};
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struct _GstAlsaMidiSrcClass
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{
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GstPushSrcClass parent_class;
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};
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G_GNUC_INTERNAL GType gst_alsa_midi_src_get_type (void);
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G_END_DECLS
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#endif /* __GST_ALSA_MIDI_SRC_H__ */
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