mgw: accept zero-length RTP payload as BFI Mainline OsmoBTS now has an option (rtp continuous-streaming) that causes it to emit an RTP packet every 20 ms without gaps, sending a BFI marker in the form of zero-length RTP payload when it has nothing else to send. These codec-independent BFI markers don't indicate TAF, but this provision is a good start. Accept this BFI packet format in themwi-mgw.

/*
 * Some bit manipulation functions.
 */

#include <stdint.h>
#include "osmo_bits.h"

void uint16_to_bits(uint16_t word, ubit_t *out, unsigned nbits)
{
	unsigned n;

	for (n = 0; n < nbits; n++)
		out[n] = (word >> (nbits-n-1)) & 1;
}