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#ifndef UTILS_H_
#define UTILS_H_
#include <math.h>
#include <stdint.h>
#include <stddef.h>
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define NUMOF(l) (sizeof(l) / sizeof(*l))
#define linear_to_dB(x) (log10(x) * 20)
/*! Calculate the little string containing a bargraph
* 'VU-meter' from the peak value measured
*/
const char* level(int channel, int peak);
/*! This defines the on-wire representation of a ZMQ message header.
* It must be compatible with the definition in ODR-DabMux.
*
* The data follows right after this header */
struct zmq_frame_header_t
{
uint16_t version; // we support version=1 now
uint16_t encoder; // see ZMQ_ENCODER_XYZ
/* length of the 'data' field */
uint32_t datasize;
/* Audio level, peak, linear PCM */
int16_t audiolevel_left;
int16_t audiolevel_right;
/* Data follows this header */
} __attribute__ ((packed));
#define ZMQ_ENCODER_FDK 1
#define ZMQ_ENCODER_TOOLAME 2
#define ZMQ_HEADER_SIZE sizeof(struct zmq_frame_header_t)
/* The expected frame size incl data of the given frame */
#define ZMQ_FRAME_SIZE(f) (sizeof(struct zmq_frame_header_t) + f->datasize)
#define ZMQ_FRAME_DATA(f) ( ((uint8_t*)f)+sizeof(struct zmq_frame_header_t) )
size_t strlen_utf8(const char *s);
#endif
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