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38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
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#ifndef __GST_RTP_DTMF_COMMON_H__
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#define __GST_RTP_DTMF_COMMON_H__
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#define MIN_INTER_DIGIT_INTERVAL 100 /* ms */
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#define MIN_PULSE_DURATION 250 /* ms */
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#define MIN_VOLUME 0
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#define MAX_VOLUME 36
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#define MIN_EVENT 0
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#define MAX_EVENT 15
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#define MIN_EVENT_STRING "0"
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#define MAX_EVENT_STRING "15"
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#ifndef M_PI
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#define M_PI 3.14159265358979323846 /* pi */
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#endif
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typedef struct
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{
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unsigned event:8; /* Current DTMF event */
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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unsigned volume:6; /* power level of the tone, in dBm0 */
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unsigned r:1; /* Reserved-bit */
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unsigned e:1; /* End-bit */
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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unsigned e:1; /* End-bit */
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unsigned r:1; /* Reserved-bit */
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unsigned volume:6; /* power level of the tone, in dBm0 */
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#else
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#error "G_BYTE_ORDER should be big or little endian."
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#endif
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unsigned duration:16; /* Duration of digit, in timestamp units */
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} GstRTPDTMFPayload;
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#endif /* __GST_RTP_DTMF_COMMON_H__ */
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