gstreamer/gst/dtmf/gstdtmfcommon.h

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/* GStreamer DTMF plugin
*
* 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_RTP_DTMF_COMMON_H__
#define __GST_RTP_DTMF_COMMON_H__
#include <gst/math-compat.h>
#define MIN_INTER_DIGIT_INTERVAL 100 /* ms */
#define MIN_PULSE_DURATION 250 /* ms */
#define MIN_VOLUME 0
#define MAX_VOLUME 36
#define MIN_EVENT 0
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#define MAX_EVENT 15
#define MIN_EVENT_STRING "0"
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#define MAX_EVENT_STRING "15"
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typedef struct
{
unsigned event:8; /* Current DTMF event */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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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
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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
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unsigned duration:16; /* Duration of digit, in timestamp units */
} GstRTPDTMFPayload;
#endif /* __GST_RTP_DTMF_COMMON_H__ */