internal void step(RecorderHub hub)
{
if (lastCheckTask != null && !lastCheckTask.IsCompleted)
{
return;
}
var recording = hub.getRecording(roomName);
if (recording?.isRunning == true)
{
return;
}
var now = UnixTime.now;
var lastRecordEnd = recording?.timeExit ?? 0L;
if (now - lastRecordEnd < 300000L)
{
// 前回の録画が終わってから5分間は 最も短い間隔でチェックする
if (now < lastCheckTime + 5000L)
{
return;
}
}
else
{
// 最低限10秒は待つ
if (now < lastCheckTime + 10000L)
{
return;
}
// 分数が0,5,10, ... に近いなら間隔を短くする
var dtNow = now.toDateTime();
var x = Math.Abs((dtNow.Minute * 60 + dtNow.Second) % 300 - 30) / 30;
var interval = x switch
{
0 => UnixTime.second1 * 10,
1 => UnixTime.second1 * 20,
8 => UnixTime.second1 * 20,
_ => UnixTime.second1 * 30,
};
if (now < lastCheckTime + interval)
{
return;
}
}
lastCheckTime = now;
lastCheckTask = Task.Run(async() => await check(hub));
}
async Task check(RecorderHub hub)
{
try {
if (!File.Exists(hub.ffmpegPath))
{
log.e($"ffmpegPath '${hub.ffmpegPath}' is not valid.");
}
var folder = getFolder(hub);
if (!Directory.Exists(folder))
{
log.e($"folder '${folder}' is not valid.");
}
// オンライブ部屋一覧にあるストリーミング情報はあまり信用できないので読み直す
var url = $"{Config.URL_TOP}api/live/streaming_url?room_id={roomId}&ignore_low_stream=1&_={UnixTime.now / 1000L}";
var request = new HttpRequestMessage(HttpMethod.Get, url);
request.Headers.Add("Accept", "application/json");
var response = await Config.httpClient.SendAsync(request).ConfigureAwait(false);
var now = UnixTime.now;
var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
var root = JToken.Parse(content);
var streaming_url_list = root.Value <JArray>("streaming_url_list");
if (streaming_url_list == null)
{
return;
}
if (streaming_url_list.Count == 0)
{
log.d($"{roomName}: there is streaming_url_list, but it's empty.");
return;
}
var list = new List <StreamingInfo>();
foreach (JObject src in streaming_url_list)
{
try {
var si = new StreamingInfo(
src.Value <String>("url") !,
src.Value <String>("type") !,
src.Value <Boolean>("is_default"),
src.Value <Int64>("quality")
);
if (si.type != "hls")
{
log.d($"{roomName}: not hls. type={si.type}");
continue;
}
list.Add(si);
} catch (Exception ex) {
log.e(ex, $"{roomName}: StreamingInfo parse failed.");
}
}
if (list.Count == 0)
{
log.d($"{roomName}: StreamingInfo list is empty. original size={streaming_url_list.Count}");
return;
}
list.Sort();
var streamUrl = list[0].url;
var recording = hub.getRecording(roomName);
if (recording?.isRunning == true && recording?.url == streamUrl)
{
log.d($"{roomName}: already recording {streamUrl}");
return;
}
// streamUrl が決定しても動画が開始しているとは限らない
request = new HttpRequestMessage(HttpMethod.Get, streamUrl);
response = await Config.httpClient.SendAsync(request).ConfigureAwait(false);
var code = response.codeInt();
if (!response.IsSuccessStatusCode)
{
log.d($"{roomName}: {code} {response.ReasonPhrase} {streamUrl}");
return;
}
content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
var reLineFeed = new Regex("[\x0d\x0a]+");
String?chunk = null;
foreach (var a in reLineFeed.Split(content))
{
var line = a.Trim();
if (line.Length == 0 || line.StartsWith("#"))
{
continue;
}
log.d(line);
if (chunk == null)
{
chunk = line;
}
}
if (chunk == null)
{
log.d($"{roomName}: missing chunk in playlsit.");
return;
}
if (!Uri.TryCreate(new Uri(streamUrl), chunk, out var chunkUrl))
{
log.d($"{roomName}: can't combile chunk url. {chunk}");
return;
}
request = new HttpRequestMessage(HttpMethod.Head, chunkUrl);
response = await Config.httpClient.SendAsync(request).ConfigureAwait(false);
code = response.codeInt();
if (!response.IsSuccessStatusCode)
{
log.d($"{roomName}: {code} {response.ReasonPhrase} {chunkUrl}");
return;
}
if (hub.isDisposed)
{
log.d($"{roomName}: hub was disposed.");
return;
}
log.d($"{roomName}: recording start!");
hub.setRecodring(roomName, streamUrl, folder);
} catch (Exception ex) {
log.e(ex, $"{roomName}: check failed.");
}
}