gstreamer/gst/dtmf/gstdtmfcommon.h
Olivier Crête 747f32a857 dtmf: Move duplicate #defines into a common include
Centralize duplicated constants so they have the same value.
Also standardise minimum tone duration to 250ms and minimum inter-tone
interval to 100ms.
2011-04-13 21:59:42 -04:00

37 lines
1.1 KiB
C

#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
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;
#endif /* __GST_RTP_DTMF_COMMON_H__ */