gstreamer/gst/dtmf/gstrtpdtmfsrc.h

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/* GStreamer RTP DTMF source
*
* gstrtpdtmfsrc.h:
*
* Copyright (C) <2007> Nokia Corporation.
* Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_RTP_DTMF_SRC_H__
#define __GST_RTP_DTMF_SRC_H__
#include <gst/gst.h>
#include <gst/base/gstbasesrc.h>
#include <gst/rtp/gstrtpbuffer.h>
G_BEGIN_DECLS
#define GST_TYPE_RTP_DTMF_SRC (gst_rtp_dtmf_src_get_type())
#define GST_RTP_DTMF_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_DTMF_SRC,GstRTPDTMFSrc))
#define GST_RTP_DTMF_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_DTMF_SRC,GstRTPDTMFSrcClass))
#define GST_RTP_DTMF_SRC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTP_DTMF_SRC, GstRTPDTMFSrcClass))
#define GST_IS_RTP_DTMF_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_DTMF_SRC))
#define GST_IS_RTP_DTMF_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_DTMF_SRC))
#define GST_RTP_DTMF_SRC_CAST(obj) ((GstRTPDTMFSrc *)(obj))
typedef struct {
unsigned event:8; /* Current DTMF event */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
unsigned volume:6; /* power level of the tone, in dBm0 */
unsigned r:1; /* Reserved-bit */
unsigned e:1; /* End-bit */
#elif G_BYTE_ORDER == G_BIG_ENDIAN
unsigned e:1; /* End-bit */
unsigned r:1; /* Reserved-bit */
unsigned volume:6; /* power level of the tone, in dBm0 */
#else
#error "G_BYTE_ORDER should be big or little endian."
#endif
unsigned duration:16; /* Duration of digit, in timestamp units */
} GstRTPDTMFPayload;
typedef struct _GstRTPDTMFSrc GstRTPDTMFSrc;
typedef struct _GstRTPDTMFSrcClass GstRTPDTMFSrcClass;
enum _GstRTPDTMFEventType {
RTP_DTMF_EVENT_TYPE_START,
RTP_DTMF_EVENT_TYPE_STOP,
RTP_DTMF_EVENT_TYPE_PAUSE_TASK
};
typedef enum _GstRTPDTMFEventType GstRTPDTMFEventType;
struct _GstRTPDTMFSrcEvent {
GstRTPDTMFEventType event_type;
GstRTPDTMFPayload* payload;
};
typedef struct _GstRTPDTMFSrcEvent GstRTPDTMFSrcEvent;
/**
* GstRTPDTMFSrc:
* @element: the parent element.
*
* The opaque #GstRTPDTMFSrc data structure.
*/
struct _GstRTPDTMFSrc {
GstBaseSrc basesrc;
GAsyncQueue* event_queue;
GstClockID clockid;
gboolean paused;
GstRTPDTMFPayload* payload;
GstClockTime timestamp;
GstClockTime start_timestamp;
gboolean first_packet;
gboolean last_packet;
guint32 ts_base;
guint16 seqnum_base;
gint16 seqnum_offset;
guint16 seqnum;
gint32 ts_offset;
guint32 rtp_timestamp;
guint pt;
guint ssrc;
guint current_ssrc;
guint16 interval;
guint16 packet_redundancy;
guint32 clock_rate;
gboolean dirty;
guint16 redundancy_count;
};
struct _GstRTPDTMFSrcClass {
GstBaseSrcClass parent_class;
};
GType gst_rtp_dtmf_src_get_type (void);
gboolean gst_rtp_dtmf_src_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_RTP_DTMF_SRC_H__ */