Migrate server to ESM

Sorry for the very big commit that may lead to git log issues and merge
conflicts, but it's a major step forward:

 * Server can be faster at startup because imports() are async and we can
   easily lazy import big modules
 * Angular doesn't seem to support ES import (with .js extension), so we
   had to correctly organize peertube into a monorepo:
    * Use yarn workspace feature
    * Use typescript reference projects for dependencies
    * Shared projects have been moved into "packages", each one is now a
      node module (with a dedicated package.json/tsconfig.json)
    * server/tools have been moved into apps/ and is now a dedicated app
      bundled and published on NPM so users don't have to build peertube
      cli tools manually
    * server/tests have been moved into packages/ so we don't compile
      them every time we want to run the server
 * Use isolatedModule option:
   * Had to move from const enum to const
     (https://www.typescriptlang.org/docs/handbook/enums.html#objects-vs-enums)
   * Had to explictely specify "type" imports when used in decorators
 * Prefer tsx (that uses esbuild under the hood) instead of ts-node to
   load typescript files (tests with mocha or scripts):
     * To reduce test complexity as esbuild doesn't support decorator
       metadata, we only test server files that do not import server
       models
     * We still build tests files into js files for a faster CI
 * Remove unmaintained peertube CLI import script
 * Removed some barrels to speed up execution (less imports)

1 files changed, 93 insertions, 0 deletions

diff --git a/packages/ffmpeg/src/shared/presets.ts b/packages/ffmpeg/src/shared/presets.ts
new file mode 100644
index 000000000..17bd7b031
--- /dev/null
+++ b/packages/ffmpeg/src/shared/presets.ts
@@ -0,0 +1,93 @@
+import { pick } from '@peertube/peertube-core-utils'
+import { FFmpegCommandWrapper } from '../ffmpeg-command-wrapper.js'
+import { getScaleFilter, StreamType } from '../ffmpeg-utils.js'
+import { ffprobePromise, getVideoStreamBitrate, getVideoStreamDimensionsInfo, hasAudioStream } from '../ffprobe.js'
+import { addDefaultEncoderGlobalParams, addDefaultEncoderParams, applyEncoderOptions } from './encoder-options.js'
+
+export async function presetVOD (options: {
+  commandWrapper: FFmpegCommandWrapper
+
+  input: string
+
+  canCopyAudio: boolean
+  canCopyVideo: boolean
+
+  resolution: number
+  fps: number
+
+  scaleFilterValue?: string
+}) {
+  const { commandWrapper, input, resolution, fps, scaleFilterValue } = options
+  const command = commandWrapper.getCommand()
+
+  command.format('mp4')
+    .outputOption('-movflags faststart')
+
+  addDefaultEncoderGlobalParams(command)
+
+  const probe = await ffprobePromise(input)
+
+  // Audio encoder
+  const bitrate = await getVideoStreamBitrate(input, probe)
+  const videoStreamDimensions = await getVideoStreamDimensionsInfo(input, probe)
+
+  let streamsToProcess: StreamType[] = [ 'audio', 'video' ]
+
+  if (!await hasAudioStream(input, probe)) {
+    command.noAudio()
+    streamsToProcess = [ 'video' ]
+  }
+
+  for (const streamType of streamsToProcess) {
+    const builderResult = await commandWrapper.getEncoderBuilderResult({
+      ...pick(options, [ 'canCopyAudio', 'canCopyVideo' ]),
+
+      input,
+      inputBitrate: bitrate,
+      inputRatio: videoStreamDimensions?.ratio || 0,
+
+      resolution,
+      fps,
+      streamType,
+
+      videoType: 'vod' as 'vod'
+    })
+
+    if (!builderResult) {
+      throw new Error('No available encoder found for stream ' + streamType)
+    }
+
+    commandWrapper.debugLog(
+      `Apply ffmpeg params from ${builderResult.encoder} for ${streamType} ` +
+      `stream of input ${input} using ${commandWrapper.getProfile()} profile.`,
+      { builderResult, resolution, fps }
+    )
+
+    if (streamType === 'video') {
+      command.videoCodec(builderResult.encoder)
+
+      if (scaleFilterValue) {
+        command.outputOption(`-vf ${getScaleFilter(builderResult.result)}=${scaleFilterValue}`)
+      }
+    } else if (streamType === 'audio') {
+      command.audioCodec(builderResult.encoder)
+    }
+
+    applyEncoderOptions(command, builderResult.result)
+    addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps })
+  }
+}
+
+export function presetCopy (commandWrapper: FFmpegCommandWrapper) {
+  commandWrapper.getCommand()
+    .format('mp4')
+    .videoCodec('copy')
+    .audioCodec('copy')
+}
+
+export function presetOnlyAudio (commandWrapper: FFmpegCommandWrapper) {
+  commandWrapper.getCommand()
+    .format('mp4')
+    .audioCodec('copy')
+    .noVideo()
+}