1 /* GStreamer 2 * Copyright (C) 2014 Antonio Ospite <ao2@ao2.it> 3 * 4 * gstalsamidisrc.h: Source element for ALSA MIDI sequencer events 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public 17 * License along with this library; if not, write to the 18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef __GST_ALSA_MIDI_SRC_H__ 23 #define __GST_ALSA_MIDI_SRC_H__ 24 25 #include <gst/gst.h> 26 #include <gst/base/gstpushsrc.h> 27 28 #include <alsa/asoundlib.h> 29 30 G_BEGIN_DECLS 31 #define GST_TYPE_ALSA_MIDI_SRC \ 32 (gst_alsa_midi_src_get_type()) 33 #define GST_ALSA_MIDI_SRC(obj) \ 34 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrc)) 35 #define GST_ALSA_MIDI_SRC_CLASS(klass) \ 36 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIDI_SRC,GstAlsaMidiSrcClass)) 37 #define GST_IS_ALSA_MIDI_SRC(obj) \ 38 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIDI_SRC)) 39 #define GST_IS_ALSA_MIDI_SRC_CLASS(klass) \ 40 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIDI_SRC)) 41 42 typedef struct _GstAlsaMidiSrc GstAlsaMidiSrc; 43 typedef struct _GstAlsaMidiSrcClass GstAlsaMidiSrcClass; 44 45 /** 46 * GstAlsaMidiSrc: 47 * 48 * Opaque #GstAlsaMidiSrc data structure. 49 */ 50 struct _GstAlsaMidiSrc 51 { 52 GstPushSrc element; 53 54 gchar *ports; 55 56 /*< private > */ 57 snd_seq_t *seq; 58 int queue; 59 int port_count; 60 snd_seq_addr_t *seq_ports; 61 snd_midi_event_t *parser; 62 unsigned char *buffer; 63 64 GstPoll *poll; 65 66 guint64 tick; 67 guint64 delay; 68 }; 69 70 struct _GstAlsaMidiSrcClass 71 { 72 GstPushSrcClass parent_class; 73 }; 74 75 G_GNUC_INTERNAL GType gst_alsa_midi_src_get_type (void); 76 77 G_END_DECLS 78 #endif /* __GST_ALSA_MIDI_SRC_H__ */ 79