#pragma once

#include <cstdint>

namespace sc {

// RTP clock rate for video is 90 kHz. Convert a monotonic nanosecond timestamp
// into a 32-bit RTP timestamp. Overflows wrap around intentionally.
constexpr uint32_t rtp_timestamp_from_ns ( uint64_t nanoseconds ) noexcept {
    // (nanoseconds * 90_000) / 1_000_000_000
    // Simplify: 90_000 / 1_000_000_000 = 9 / 100_000
    return static_cast<uint32_t> ( ( nanoseconds * 9ULL ) / 100'000ULL );
}

static_assert ( rtp_timestamp_from_ns ( 0 ) == 0 );
static_assert ( rtp_timestamp_from_ns ( 1'000'000'000ULL ) == 90'000 );
static_assert ( rtp_timestamp_from_ns ( 500'000'000ULL ) == 45'000 );

}  // namespace sc