From 0348fcedf691299b843f7eb351d8d4a67674e548 Mon Sep 17 00:00:00 2001 From: wangyu- <wangyucn@gmail.com> Date: Sun, 19 Nov 2017 06:02:20 -0600 Subject: [PATCH] changed default mode to mode 0;improve help page --- fec_manager.cpp | 2 +- main.cpp | 14 ++++++++------ 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/fec_manager.cpp b/fec_manager.cpp index 18b54d6..6fe167f 100644 --- a/fec_manager.cpp +++ b/fec_manager.cpp @@ -16,7 +16,7 @@ int g_fec_redundant_num=10; int g_fec_mtu=1250; int g_fec_queue_len=200; int g_fec_timeout=8*1000; //8ms -int g_fec_mode=1; +int g_fec_mode=0; int dynamic_update_fec=1; diff --git a/main.cpp b/main.cpp index ec1f622..4839d0e 100644 --- a/main.cpp +++ b/main.cpp @@ -34,19 +34,22 @@ static void print_help() printf("main options:\n"); printf(" -f,--fec x:y forward error correction, send y redundant packets for every x packets\n"); printf(" --timeout <number> how long could a packet be held in queue before doing fec, unit: ms, default: 8ms\n"); - printf(" --mode <number> fec-mode,available values: 0, 1; 0 cost less bandwidth, 1 cost less latency(default)\n"); printf(" --report <number> turn on send/recv report, and set a period for reporting, unit: s\n"); printf("advanced options:\n"); - printf(" --mtu <number> mtu. for mode 0, the program will split packet to segment smaller than mtu_value.\n"); + printf(" --mode <number> fec-mode,available values: 0,1; mode 0(default) costs less bandwidth,no mtu problem.\n"); + printf(" mode 1 usually introduces less latency, but you have to care about mtu.\n"); + printf(" --mtu <number> mtu. for mode 0, the program will split packet to segment smaller than mtu value.\n"); printf(" for mode 1, no packet will be split, the program just check if the mtu is exceed.\n"); - printf(" default value: 1250\n"); + printf(" default value: 1250. you typically shouldnt change this value.\n"); + printf(" -q,--queue-len <number> fec queue len, only for mode 0, fec will be performed immediately after queue is full.\n"); + printf(" default value: 200. \n"); printf(" -j,--jitter <number> simulated jitter. randomly delay first packet for 0~<number> ms, default value: 0.\n"); printf(" do not use if you dont know what it means.\n"); printf(" -i,--interval <number> scatter each fec group to a interval of <number> ms, to protect burst packet loss.\n"); printf(" default value: 0. do not use if you dont know what it means.\n"); - printf(" --random-drop <number> simulate packet loss, unit: 0.01%%. default value: 0\n"); - printf(" --disable-obscure <number> disable obscure, to save a bit bandwidth and cpu\n"); + printf(" --random-drop <number> simulate packet loss, unit: 0.01%%. default value: 0.\n"); + printf(" --disable-obscure <number> disable obscure, to save a bit bandwidth and cpu.\n"); // printf(" --disable-xor <number> disable xor\n"); printf("developer options:\n"); @@ -55,7 +58,6 @@ static void print_help() printf(" supported commands.\n"); printf(" -j ,--jitter jmin:jmax similiar to -j above, but create jitter randomly between jmin and jmax\n"); printf(" -i,--interval imin:imax similiar to -i above, but scatter randomly between imin and imax\n"); - printf(" -q,--queue-len <number> max fec queue len, only for mode 0\n"); printf(" --decode-buf <number> size of buffer of fec decoder,u nit: packet, default: 2000\n"); printf(" --fix-latency <number> try to stabilize latency, only for mode 0\n"); printf(" --delay-capacity <number> max number of delayed packets\n");