Implement video transcoding on server side

2 files changed, 31 insertions, 4 deletions

diff --git a/server/helpers/core-utils.ts b/server/helpers/core-utils.ts
index 2ec7e6515..3118dc500 100644
--- a/server/helpers/core-utils.ts
+++ b/server/helpers/core-utils.ts
@@ -11,7 +11,9 @@ import {
   rename,
   unlink,
   writeFile,
-  access
+  access,
+  stat,
+  Stats
 } from 'fs'
 import * as mkdirp from 'mkdirp'
 import * as bcrypt from 'bcrypt'
@@ -92,6 +94,7 @@ const bcryptGenSaltPromise = promisify1<number, string>(bcrypt.genSalt)
 const bcryptHashPromise = promisify2<any, string|number, string>(bcrypt.hash)
 const createTorrentPromise = promisify2<string, any, any>(createTorrent)
 const rimrafPromise = promisify1WithVoid<string>(rimraf)
+const statPromise = promisify1<string, Stats>(stat)
 
 // ---------------------------------------------------------------------------
 
@@ -115,5 +118,6 @@ export {
   bcryptGenSaltPromise,
   bcryptHashPromise,
   createTorrentPromise,
-  rimrafPromise
+  rimrafPromise,
+  statPromise
 }
diff --git a/server/helpers/utils.ts b/server/helpers/utils.ts
index ce07ceff9..b74442ab0 100644
--- a/server/helpers/utils.ts
+++ b/server/helpers/utils.ts
@@ -4,6 +4,7 @@ import * as Promise from 'bluebird'
 import { pseudoRandomBytesPromise } from './core-utils'
 import { CONFIG, database as db } from '../initializers'
 import { ResultList } from '../../shared'
+import { VideoResolution } from '../../shared/models/videos/video-resolution.enum'
 
 function badRequest (req: express.Request, res: express.Response, next: express.NextFunction) {
   res.type('json').status(400).end()
@@ -13,11 +14,11 @@ function generateRandomString (size: number) {
   return pseudoRandomBytesPromise(size).then(raw => raw.toString('hex'))
 }
 
-interface FormatableToJSON {
+interface FormattableToJSON {
   toFormattedJSON ()
 }
 
-function getFormattedObjects<U, T extends FormatableToJSON> (objects: T[], objectsTotal: number) {
+function getFormattedObjects<U, T extends FormattableToJSON> (objects: T[], objectsTotal: number) {
   const formattedObjects: U[] = []
 
   objects.forEach(object => {
@@ -47,6 +48,27 @@ function isSignupAllowed () {
   })
 }
 
+function computeResolutionsToTranscode (videoFileHeight: number) {
+  const resolutionsEnabled: number[] = []
+  const configResolutions = CONFIG.TRANSCODING.RESOLUTIONS
+
+  const resolutions = [
+    VideoResolution.H_240P,
+    VideoResolution.H_360P,
+    VideoResolution.H_480P,
+    VideoResolution.H_720P,
+    VideoResolution.H_1080P
+  ]
+
+  for (const resolution of resolutions) {
+    if (configResolutions[resolution.toString()] === true && videoFileHeight >= resolution) {
+      resolutionsEnabled.push(resolution)
+    }
+  }
+
+  return resolutionsEnabled
+}
+
 type SortType = { sortModel: any, sortValue: string }
 
 // ---------------------------------------------------------------------------
@@ -56,5 +78,6 @@ export {
   generateRandomString,
   getFormattedObjects,
   isSignupAllowed,
+  computeResolutionsToTranscode,
   SortType
 }