gstreamer/gst/dtmf/gstdtmfcommon.h

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#ifndef __GST_RTP_DTMF_COMMON_H__
#define __GST_RTP_DTMF_COMMON_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
#define MAX_EVENT 16
#define MIN_EVENT_STRING "0"
#define MAX_EVENT_STRING "16"
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#endif
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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__ */