Add latency setting support

4 files changed, 49 insertions, 6 deletions

diff --git a/server/initializers/checker-before-init.ts b/server/initializers/checker-before-init.ts
index 10dd98f43..fa311f708 100644
--- a/server/initializers/checker-before-init.ts
+++ b/server/initializers/checker-before-init.ts
@@ -49,8 +49,8 @@ function checkMissedConfig () {
     'peertube.check_latest_version.enabled', 'peertube.check_latest_version.url',
     'search.remote_uri.users', 'search.remote_uri.anonymous', 'search.search_index.enabled', 'search.search_index.url',
     'search.search_index.disable_local_search', 'search.search_index.is_default_search',
-    'live.enabled', 'live.allow_replay', 'live.max_duration', 'live.max_user_lives', 'live.max_instance_lives',
-    'live.rtmp.enabled', 'live.rtmp.port', 'live.rtmp.hostname',
+    'live.enabled', 'live.allow_replay', 'live.latency_setting.enabled', 'live.max_duration',
+    'live.max_user_lives', 'live.max_instance_lives', 'live.rtmp.enabled', 'live.rtmp.port', 'live.rtmp.hostname',
     'live.rtmps.enabled', 'live.rtmps.port', 'live.rtmps.hostname', 'live.rtmps.key_file', 'live.rtmps.cert_file',
     'live.transcoding.enabled', 'live.transcoding.threads', 'live.transcoding.profile',
     'live.transcoding.resolutions.144p', 'live.transcoding.resolutions.240p', 'live.transcoding.resolutions.360p',
diff --git a/server/initializers/config.ts b/server/initializers/config.ts
index 7a13a1368..6dcca9b67 100644
--- a/server/initializers/config.ts
+++ b/server/initializers/config.ts
@@ -4,9 +4,9 @@ import { dirname, join } from 'path'
 import { decacheModule } from '@server/helpers/decache'
 import { VideoRedundancyConfigFilter } from '@shared/models/redundancy/video-redundancy-config-filter.type'
 import { BroadcastMessageLevel } from '@shared/models/server'
+import { buildPath, root } from '../../shared/core-utils'
 import { VideoPrivacy, VideosRedundancyStrategy } from '../../shared/models'
 import { NSFWPolicyType } from '../../shared/models/videos/nsfw-policy.type'
-import { buildPath, root } from '../../shared/core-utils'
 import { parseBytes, parseDurationToMs } from '../helpers/core-utils'
 
 // Use a variable to reload the configuration if we need
@@ -296,6 +296,10 @@ const CONFIG = {
 
     get ALLOW_REPLAY () { return config.get<boolean>('live.allow_replay') },
 
+    LATENCY_SETTING: {
+      get ENABLED () { return config.get<boolean>('live.latency_setting.enabled') }
+    },
+
     RTMP: {
       get ENABLED () { return config.get<boolean>('live.rtmp.enabled') },
       get PORT () { return config.get<number>('live.rtmp.port') },
diff --git a/server/initializers/constants.ts b/server/initializers/constants.ts
index 7bc2877aa..1c849b561 100644
--- a/server/initializers/constants.ts
+++ b/server/initializers/constants.ts
@@ -24,7 +24,7 @@ import { CONFIG, registerConfigChangedHandler } from './config'
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 685
+const LAST_MIGRATION_VERSION = 690
 
 // ---------------------------------------------------------------------------
 
@@ -700,7 +700,10 @@ const RESUMABLE_UPLOAD_SESSION_LIFETIME = SCHEDULER_INTERVALS_MS.REMOVE_DANGLING
 const VIDEO_LIVE = {
   EXTENSION: '.ts',
   CLEANUP_DELAY: 1000 * 60 * 5, // 5 minutes
-  SEGMENT_TIME_SECONDS: 4, // 4 seconds
+  SEGMENT_TIME_SECONDS: {
+    DEFAULT_LATENCY: 4, // 4 seconds
+    SMALL_LATENCY: 2 // 2 seconds
+  },
   SEGMENTS_LIST_SIZE: 15, // 15 maximum segments in live playlist
   REPLAY_DIRECTORY: 'replay',
   EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION: 4,
@@ -842,7 +845,8 @@ if (isTestInstance() === true) {
   PLUGIN_EXTERNAL_AUTH_TOKEN_LIFETIME = 5000
 
   VIDEO_LIVE.CLEANUP_DELAY = 5000
-  VIDEO_LIVE.SEGMENT_TIME_SECONDS = 2
+  VIDEO_LIVE.SEGMENT_TIME_SECONDS.DEFAULT_LATENCY = 2
+  VIDEO_LIVE.SEGMENT_TIME_SECONDS.SMALL_LATENCY = 1
   VIDEO_LIVE.EDGE_LIVE_DELAY_SEGMENTS_NOTIFICATION = 1
 }
 
diff --git a/server/initializers/migrations/0690-live-latency-mode.ts b/server/initializers/migrations/0690-live-latency-mode.ts
new file mode 100644
index 000000000..c31a61364
--- /dev/null
+++ b/server/initializers/migrations/0690-live-latency-mode.ts
@@ -0,0 +1,35 @@
+import { LiveVideoLatencyMode } from '@shared/models'
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+  db: any
+}): Promise<void> {
+  await utils.queryInterface.addColumn('videoLive', 'latencyMode', {
+    type: Sequelize.INTEGER,
+    defaultValue: null,
+    allowNull: true
+  }, { transaction: utils.transaction })
+
+  {
+    const query = `UPDATE "videoLive" SET "latencyMode" = ${LiveVideoLatencyMode.DEFAULT}`
+    await utils.sequelize.query(query, { type: Sequelize.QueryTypes.UPDATE, transaction: utils.transaction })
+  }
+
+  await utils.queryInterface.changeColumn('videoLive', 'latencyMode', {
+    type: Sequelize.INTEGER,
+    defaultValue: null,
+    allowNull: false
+  }, { transaction: utils.transaction })
+}
+
+function down () {
+  throw new Error('Not implemented.')
+}
+
+export {
+  up,
+  down
+}