parent
f3fe9b60d2
commit
605b9347a4
145
src/main.zig
145
src/main.zig
|
@ -18,6 +18,112 @@ const WantedMode = enum { send, recv };
|
||||||
const AddrTuple = struct { from: network.EndPoint, to: network.EndPoint };
|
const AddrTuple = struct { from: network.EndPoint, to: network.EndPoint };
|
||||||
const Mode = union(enum) { send: AddrTuple, recv: AddrTuple };
|
const Mode = union(enum) { send: AddrTuple, recv: AddrTuple };
|
||||||
|
|
||||||
|
const BufferQueue = std.atomic.Queue([]u8);
|
||||||
|
|
||||||
|
const Context = struct {
|
||||||
|
frame_allocator: std.mem.Allocator,
|
||||||
|
frames: BufferQueue,
|
||||||
|
from_sock: network.Socket,
|
||||||
|
to: network.EndPoint,
|
||||||
|
to_sock: network.Socket,
|
||||||
|
|
||||||
|
const Self = @This();
|
||||||
|
|
||||||
|
pub fn createNode(self: *Self, data: []const u8) !*BufferQueue.Node {
|
||||||
|
var queue_node = try self.frame_allocator.create(BufferQueue.Node);
|
||||||
|
var node_data = try self.frame_allocator.dupe(u8, data);
|
||||||
|
queue_node.data = node_data;
|
||||||
|
return queue_node;
|
||||||
|
}
|
||||||
|
pub fn destroyNode(self: *Self, node: *BufferQueue.Node) void {
|
||||||
|
self.frame_allocator.free(node.data);
|
||||||
|
self.frame_allocator.destroy(node);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
const SINGLE_BUFFER_SIZE = 1157;
|
||||||
|
const BURST_SIZE = 50;
|
||||||
|
const MAX_JITTER_NS = 50 * std.time.ns_per_ms;
|
||||||
|
|
||||||
|
const BurstFrame = struct {
|
||||||
|
data: [SINGLE_BUFFER_SIZE]u8,
|
||||||
|
message: []u8,
|
||||||
|
};
|
||||||
|
|
||||||
|
fn receiverThread(ctx: *Context) !void {
|
||||||
|
const reader = ctx.from_sock.reader();
|
||||||
|
|
||||||
|
var frame_count: usize = 0;
|
||||||
|
var last_frame_timestamp_ns: i128 = 0;
|
||||||
|
var state: enum { Normal, Burst } = .Normal;
|
||||||
|
|
||||||
|
var burst_buffers: [BURST_SIZE]BurstFrame = undefined;
|
||||||
|
var burst_count: usize = 0;
|
||||||
|
|
||||||
|
while (true) : (frame_count += 1) {
|
||||||
|
var frame: [SINGLE_BUFFER_SIZE]u8 = undefined;
|
||||||
|
const received_bytes = try reader.read(&frame);
|
||||||
|
const frame_timestamp_ns = std.time.nanoTimestamp();
|
||||||
|
const message = frame[0..received_bytes];
|
||||||
|
|
||||||
|
switch (state) {
|
||||||
|
.Burst => {
|
||||||
|
logger.info("burst: {d}", .{burst_count});
|
||||||
|
// turn incoming frame into a BurstFrame
|
||||||
|
burst_buffers[burst_count].data = frame;
|
||||||
|
burst_buffers[burst_count].message = burst_buffers[burst_count].data[0..frame.len];
|
||||||
|
burst_count += 1;
|
||||||
|
|
||||||
|
// once we reached the limit, dump them all, switch to Normal
|
||||||
|
if (burst_count > (burst_buffers.len - 1)) {
|
||||||
|
for (burst_buffers) |burst_buffer| {
|
||||||
|
ctx.frames.put(try ctx.createNode(burst_buffer.message));
|
||||||
|
}
|
||||||
|
|
||||||
|
last_frame_timestamp_ns = frame_timestamp_ns;
|
||||||
|
state = .Normal;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
.Normal => {
|
||||||
|
const delta = frame_timestamp_ns - last_frame_timestamp_ns;
|
||||||
|
|
||||||
|
if (delta < MAX_JITTER_NS) {
|
||||||
|
// within acceptable jitter, send frame immediately to queue
|
||||||
|
last_frame_timestamp_ns = frame_timestamp_ns;
|
||||||
|
ctx.frames.put(try ctx.createNode(message));
|
||||||
|
} else {
|
||||||
|
// we need to fill some more buffers before we can send this frame
|
||||||
|
logger.warn("unacceptable jitter detected {d}ms", .{delta});
|
||||||
|
burst_count = 0;
|
||||||
|
state = .Burst;
|
||||||
|
}
|
||||||
|
},
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn senderThread(ctx: *Context) !void {
|
||||||
|
while (true) {
|
||||||
|
const node = (ctx.frames.get()) orelse {
|
||||||
|
// if no incoming frames, wait
|
||||||
|
std.time.sleep(100 * std.time.ns_per_ms);
|
||||||
|
continue;
|
||||||
|
};
|
||||||
|
defer ctx.destroyNode(node);
|
||||||
|
|
||||||
|
const received_bytes = node.data.len;
|
||||||
|
const sent_bytes = try ctx.to_sock.sendTo(ctx.to, node.data);
|
||||||
|
if (sent_bytes != received_bytes) {
|
||||||
|
logger.warn(
|
||||||
|
"tried to send {d} bytes, actually sent {d}",
|
||||||
|
.{ received_bytes, sent_bytes },
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
std.time.sleep(375);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
pub fn main() !void {
|
pub fn main() !void {
|
||||||
try network.init();
|
try network.init();
|
||||||
defer network.deinit();
|
defer network.deinit();
|
||||||
|
@ -47,33 +153,18 @@ pub fn main() !void {
|
||||||
var to_sock = try network.Socket.create(.ipv4, .udp);
|
var to_sock = try network.Socket.create(.ipv4, .udp);
|
||||||
defer to_sock.close();
|
defer to_sock.close();
|
||||||
|
|
||||||
const BUFSIZE = 4;
|
var queue = BufferQueue.init();
|
||||||
const Buffer = struct {
|
var ctx = Context{
|
||||||
raw_data: [2048]u8,
|
.frame_allocator = allocator,
|
||||||
message: []u8,
|
.frames = queue,
|
||||||
|
.from_sock = from_sock,
|
||||||
|
.to = to,
|
||||||
|
.to_sock = to_sock,
|
||||||
};
|
};
|
||||||
|
var receiver_thread = try std.Thread.spawn(.{}, receiverThread, .{&ctx});
|
||||||
|
var sender_thread = try std.Thread.spawn(.{}, senderThread, .{&ctx});
|
||||||
|
|
||||||
var receive_buffers: [BUFSIZE]Buffer = undefined;
|
receiver_thread.join();
|
||||||
var receive_buffer_index: usize = 0;
|
sender_thread.join();
|
||||||
|
logger.info("end", .{});
|
||||||
const reader = from_sock.reader();
|
|
||||||
|
|
||||||
while (true) : (receive_buffer_index += 1) {
|
|
||||||
const array_index = receive_buffer_index % BUFSIZE;
|
|
||||||
const raw_data = &receive_buffers[array_index].raw_data;
|
|
||||||
const received_bytes = try reader.read(raw_data);
|
|
||||||
receive_buffers[array_index].message = raw_data[0..received_bytes];
|
|
||||||
|
|
||||||
if (receive_buffer_index > BUFSIZE) {
|
|
||||||
const index_to_send = (receive_buffer_index - BUFSIZE - 1) % BUFSIZE;
|
|
||||||
const bytes_to_send = receive_buffers[index_to_send].message;
|
|
||||||
const sent_bytes = try to_sock.sendTo(to, bytes_to_send);
|
|
||||||
if (sent_bytes != received_bytes) {
|
|
||||||
logger.warn(
|
|
||||||
"tried to send {d} bytes, actually sent {d}",
|
|
||||||
.{ received_bytes, sent_bytes },
|
|
||||||
);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue