492 lines
13 KiB
Go
492 lines
13 KiB
Go
package media
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"database/sql"
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"strconv"
|
|
"time"
|
|
|
|
"git.netflux.io/rob/clipper/generated/store"
|
|
"github.com/aws/aws-sdk-go-v2/aws"
|
|
"github.com/aws/aws-sdk-go-v2/service/s3"
|
|
"github.com/google/uuid"
|
|
youtubev2 "github.com/kkdai/youtube/v2"
|
|
)
|
|
|
|
const s3Bucket = "clipper-development"
|
|
|
|
const (
|
|
rawAudioCodec = "pcm_s16le"
|
|
rawAudioFormat = "s16le"
|
|
rawAudioSampleRate = 48_000
|
|
rawAudioMimeType = "audio/raw"
|
|
)
|
|
|
|
const (
|
|
thumbnailWidth = 177 // 16:9
|
|
thumbnailHeight = 100 // "
|
|
)
|
|
|
|
// progressReader is a reader that prints progress logs as it reads.
|
|
type progressReader struct {
|
|
io.Reader
|
|
label string
|
|
total, exp int
|
|
}
|
|
|
|
func (pw *progressReader) Read(p []byte) (int, error) {
|
|
n, err := pw.Reader.Read(p)
|
|
pw.total += n
|
|
|
|
log.Printf("[ProgressReader] [%s] Read %d of %d (%.02f%%) bytes from the provided reader", pw.label, pw.total, pw.exp, (float32(pw.total)/float32(pw.exp))*100.0)
|
|
|
|
return n, err
|
|
}
|
|
|
|
// Store wraps a database store.
|
|
type Store interface {
|
|
GetMediaSet(ctx context.Context, id uuid.UUID) (store.MediaSet, error)
|
|
GetMediaSetByYoutubeID(ctx context.Context, youtubeID string) (store.MediaSet, error)
|
|
CreateMediaSet(ctx context.Context, arg store.CreateMediaSetParams) (store.MediaSet, error)
|
|
SetAudioUploaded(ctx context.Context, arg store.SetAudioUploadedParams) (store.MediaSet, error)
|
|
}
|
|
|
|
// S3Client wraps the AWS S3 service client.
|
|
type S3Client interface {
|
|
GetObject(context.Context, *s3.GetObjectInput, ...func(*s3.Options)) (*s3.GetObjectOutput, error)
|
|
CreateMultipartUpload(context.Context, *s3.CreateMultipartUploadInput, ...func(*s3.Options)) (*s3.CreateMultipartUploadOutput, error)
|
|
UploadPart(context.Context, *s3.UploadPartInput, ...func(*s3.Options)) (*s3.UploadPartOutput, error)
|
|
AbortMultipartUpload(ctx context.Context, params *s3.AbortMultipartUploadInput, optFns ...func(*s3.Options)) (*s3.AbortMultipartUploadOutput, error)
|
|
CompleteMultipartUpload(context.Context, *s3.CompleteMultipartUploadInput, ...func(*s3.Options)) (*s3.CompleteMultipartUploadOutput, error)
|
|
}
|
|
|
|
// YoutubeClient wraps the youtube.Client client.
|
|
type YoutubeClient interface {
|
|
GetVideoContext(context.Context, string) (*youtubev2.Video, error)
|
|
GetStreamContext(context.Context, *youtubev2.Video, *youtubev2.Format) (io.ReadCloser, int64, error)
|
|
}
|
|
|
|
// MediaSetService exposes logical flows handling MediaSets.
|
|
type MediaSetService struct {
|
|
store Store
|
|
youtube YoutubeClient
|
|
s3 S3Client
|
|
}
|
|
|
|
func NewMediaSetService(store Store, youtubeClient YoutubeClient, s3Client S3Client) *MediaSetService {
|
|
return &MediaSetService{
|
|
store: store,
|
|
youtube: youtubeClient,
|
|
s3: s3Client,
|
|
}
|
|
}
|
|
|
|
// Get fetches the metadata for a given MediaSet source.
|
|
func (s *MediaSetService) Get(ctx context.Context, youtubeID string) (*MediaSet, error) {
|
|
var (
|
|
mediaSet *MediaSet
|
|
err error
|
|
)
|
|
|
|
mediaSet, err = s.findMediaSet(ctx, youtubeID)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting existing media set: %v", err)
|
|
}
|
|
|
|
if mediaSet == nil {
|
|
mediaSet, err = s.createMediaSet(ctx, youtubeID)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting new media set: %v", err)
|
|
}
|
|
}
|
|
|
|
return mediaSet, nil
|
|
}
|
|
|
|
func (s *MediaSetService) createMediaSet(ctx context.Context, youtubeID string) (*MediaSet, error) {
|
|
video, err := s.youtube.GetVideoContext(ctx, youtubeID)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error fetching video: %v", err)
|
|
}
|
|
|
|
if len(video.Formats) == 0 {
|
|
return nil, errors.New("no format available")
|
|
}
|
|
|
|
audioMetadata, err := s.fetchAudioMetadata(ctx, video)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error fetching audio metadata: %v", err)
|
|
}
|
|
videoMetadata, err := s.fetchVideoMetadata(ctx, video)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error fetching video metadata: %v", err)
|
|
}
|
|
|
|
params := store.CreateMediaSetParams{
|
|
YoutubeID: youtubeID,
|
|
AudioYoutubeItag: int32(audioMetadata.YoutubeItag),
|
|
AudioChannels: int32(audioMetadata.Channels),
|
|
AudioFramesApprox: audioMetadata.ApproxFrames,
|
|
AudioSampleRate: int32(audioMetadata.SampleRate),
|
|
AudioMimeTypeEncoded: audioMetadata.MimeType,
|
|
VideoYoutubeItag: int32(videoMetadata.YoutubeItag),
|
|
VideoMimeType: videoMetadata.MimeType,
|
|
VideoDurationNanos: videoMetadata.Duration.Nanoseconds(),
|
|
}
|
|
mediaSet, err := s.store.CreateMediaSet(ctx, params)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating media set in store: %v", err)
|
|
}
|
|
|
|
return &MediaSet{
|
|
ID: mediaSet.ID,
|
|
YoutubeID: youtubeID,
|
|
Audio: audioMetadata,
|
|
Video: videoMetadata,
|
|
}, nil
|
|
}
|
|
|
|
// findMediaSet fetches a record from the database, returning (nil, nil) if it does not exist.
|
|
func (s *MediaSetService) findMediaSet(ctx context.Context, youtubeID string) (*MediaSet, error) {
|
|
mediaSet, err := s.store.GetMediaSetByYoutubeID(ctx, youtubeID)
|
|
if err != nil {
|
|
if err == sql.ErrNoRows {
|
|
return nil, nil
|
|
}
|
|
return nil, fmt.Errorf("error getting existing media set: %v", err)
|
|
}
|
|
|
|
return &MediaSet{
|
|
ID: mediaSet.ID,
|
|
YoutubeID: mediaSet.YoutubeID,
|
|
Audio: Audio{
|
|
YoutubeItag: int(mediaSet.AudioYoutubeItag),
|
|
Bytes: 0, // DEPRECATED
|
|
Channels: int(mediaSet.AudioChannels),
|
|
ApproxFrames: int64(mediaSet.AudioFramesApprox),
|
|
Frames: mediaSet.AudioFrames.Int64,
|
|
SampleRate: int(mediaSet.AudioSampleRate),
|
|
MimeType: mediaSet.AudioMimeTypeEncoded,
|
|
},
|
|
Video: Video{
|
|
YoutubeItag: int(mediaSet.VideoYoutubeItag),
|
|
Bytes: 0, // DEPRECATED?
|
|
Duration: time.Duration(mediaSet.VideoDurationNanos),
|
|
MimeType: mediaSet.VideoMimeType,
|
|
ThumbnailWidth: 0, // ??
|
|
ThumbnailHeight: 0, // ??
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
func (s *MediaSetService) fetchVideoMetadata(ctx context.Context, video *youtubev2.Video) (Video, error) {
|
|
formats := FilterYoutubeVideo(video.Formats)
|
|
if len(video.Formats) == 0 {
|
|
return Video{}, errors.New("no format available")
|
|
}
|
|
format := formats[0]
|
|
|
|
durationMsecs, err := strconv.Atoi(format.ApproxDurationMs)
|
|
if err != nil {
|
|
return Video{}, fmt.Errorf("could not parse video duration: %s", err)
|
|
}
|
|
|
|
return Video{
|
|
YoutubeItag: format.ItagNo,
|
|
MimeType: format.MimeType,
|
|
Bytes: format.ContentLength,
|
|
ThumbnailWidth: thumbnailWidth,
|
|
ThumbnailHeight: thumbnailHeight,
|
|
Duration: time.Duration(durationMsecs) * time.Millisecond,
|
|
}, nil
|
|
}
|
|
|
|
func (s *MediaSetService) fetchAudioMetadata(ctx context.Context, video *youtubev2.Video) (Audio, error) {
|
|
formats := FilterYoutubeAudio(video.Formats)
|
|
if len(video.Formats) == 0 {
|
|
return Audio{}, errors.New("no format available")
|
|
}
|
|
format := formats[0]
|
|
|
|
sampleRate, err := strconv.Atoi(format.AudioSampleRate)
|
|
if err != nil {
|
|
return Audio{}, fmt.Errorf("invalid samplerate: %s", format.AudioSampleRate)
|
|
}
|
|
|
|
approxDurationMsecs, err := strconv.Atoi(format.ApproxDurationMs)
|
|
if err != nil {
|
|
return Audio{}, fmt.Errorf("could not parse audio duration: %s", err)
|
|
}
|
|
approxDuration := time.Duration(approxDurationMsecs) * time.Millisecond
|
|
approxFrames := int64(approxDuration/time.Second) * int64(sampleRate)
|
|
|
|
return Audio{
|
|
MimeType: format.MimeType,
|
|
YoutubeItag: format.ItagNo,
|
|
ApproxFrames: approxFrames,
|
|
Channels: format.AudioChannels,
|
|
SampleRate: sampleRate,
|
|
}, nil
|
|
}
|
|
|
|
// GetAudio fetches the audio part of a MediaSet.
|
|
func (s *MediaSetService) GetAudio(ctx context.Context, id uuid.UUID, numBins int) (GetAudioProgressReader, error) {
|
|
mediaSet, err := s.store.GetMediaSet(ctx, id)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting media set: %v", err)
|
|
}
|
|
|
|
if mediaSet.AudioS3UploadedAt.Valid {
|
|
return s.getAudioFromS3(ctx, mediaSet, numBins)
|
|
}
|
|
|
|
return s.getAudioFromYoutube(ctx, mediaSet, numBins)
|
|
}
|
|
|
|
func (s *MediaSetService) getAudioFromS3(ctx context.Context, mediaSet store.MediaSet, numBins int) (GetAudioProgressReader, error) {
|
|
input := s3.GetObjectInput{
|
|
Bucket: aws.String(mediaSet.AudioS3Bucket.String),
|
|
Key: aws.String(mediaSet.AudioS3Key.String),
|
|
}
|
|
output, err := s.s3.GetObject(ctx, &input)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error getting object from s3: %v", err)
|
|
}
|
|
|
|
fetchAudioProgressReader := newGetAudioProgressReader(
|
|
binary.BigEndian,
|
|
int64(mediaSet.AudioFrames.Int64),
|
|
int(mediaSet.AudioChannels),
|
|
numBins,
|
|
)
|
|
|
|
state := getAudioFromS3State{
|
|
fetchAudioProgressReader: fetchAudioProgressReader,
|
|
s3Reader: NewModuloBufReader(output.Body, int(mediaSet.AudioChannels)*SizeOfInt16),
|
|
}
|
|
go state.run(ctx)
|
|
|
|
return &state, nil
|
|
}
|
|
|
|
type getAudioFromS3State struct {
|
|
*fetchAudioProgressReader
|
|
|
|
s3Reader io.ReadCloser
|
|
}
|
|
|
|
func (s *getAudioFromS3State) run(ctx context.Context) {
|
|
done := make(chan error)
|
|
var err error
|
|
|
|
go func() {
|
|
_, copyErr := io.Copy(s, s.s3Reader)
|
|
done <- copyErr
|
|
}()
|
|
|
|
outer:
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
err = ctx.Err()
|
|
break outer
|
|
case err = <-done:
|
|
break outer
|
|
}
|
|
}
|
|
|
|
if readerErr := s.s3Reader.Close(); readerErr != nil {
|
|
if err == nil {
|
|
err = readerErr
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
log.Printf("error closing s3Reader: %v", err)
|
|
s.Abort(err)
|
|
return
|
|
}
|
|
|
|
if iterErr := s.Close(); iterErr != nil {
|
|
log.Printf("error closing progress iterator: %v", iterErr)
|
|
}
|
|
}
|
|
|
|
func (s *MediaSetService) getAudioFromYoutube(ctx context.Context, mediaSet store.MediaSet, numBins int) (GetAudioProgressReader, error) {
|
|
video, err := s.youtube.GetVideoContext(ctx, mediaSet.YoutubeID)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error fetching video: %v", err)
|
|
}
|
|
|
|
format := video.Formats.FindByItag(int(mediaSet.AudioYoutubeItag))
|
|
if format == nil {
|
|
return nil, fmt.Errorf("error finding itag: %v", err)
|
|
}
|
|
|
|
stream, _, err := s.youtube.GetStreamContext(ctx, video, format)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error fetching stream: %v", err)
|
|
}
|
|
|
|
// wrap it in a progress reader
|
|
progressStream := &progressReader{Reader: stream, label: "audio", exp: int(format.ContentLength)}
|
|
|
|
ffmpegReader, err := newFfmpegReader(ctx, progressStream, "-i", "-", "-f", rawAudioFormat, "-ar", strconv.Itoa(rawAudioSampleRate), "-acodec", rawAudioCodec, "-")
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating ffmpegreader: %v", err)
|
|
}
|
|
|
|
s3Key := fmt.Sprintf("media_sets/%s/audio.raw", mediaSet.ID)
|
|
uploader, err := newMultipartUploadWriter(
|
|
ctx,
|
|
s.s3,
|
|
s3Bucket,
|
|
s3Key,
|
|
rawAudioMimeType,
|
|
)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating uploader: %v", err)
|
|
}
|
|
|
|
fetchAudioProgressReader := newGetAudioProgressReader(
|
|
binary.LittleEndian,
|
|
int64(mediaSet.AudioFramesApprox),
|
|
format.AudioChannels,
|
|
numBins,
|
|
)
|
|
|
|
state := getAudioFromYoutubeState{
|
|
fetchAudioProgressReader: fetchAudioProgressReader,
|
|
ffmpegReader: ffmpegReader,
|
|
uploader: uploader,
|
|
s3Bucket: s3Bucket,
|
|
s3Key: s3Key,
|
|
store: s.store,
|
|
}
|
|
go state.run(ctx, mediaSet.ID)
|
|
|
|
return &state, nil
|
|
}
|
|
|
|
type getAudioFromYoutubeState struct {
|
|
*fetchAudioProgressReader
|
|
|
|
ffmpegReader *ffmpegReader
|
|
uploader *multipartUploadWriter
|
|
s3Bucket, s3Key string
|
|
store Store
|
|
}
|
|
|
|
func (s *getAudioFromYoutubeState) run(ctx context.Context, mediaSetID uuid.UUID) {
|
|
mw := io.MultiWriter(s, s.uploader)
|
|
done := make(chan error)
|
|
var err error
|
|
|
|
go func() {
|
|
_, copyErr := io.Copy(mw, s.ffmpegReader)
|
|
done <- copyErr
|
|
}()
|
|
|
|
outer:
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
err = ctx.Err()
|
|
break outer
|
|
case err = <-done:
|
|
break outer
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
if cancelErr := s.ffmpegReader.Cancel(); cancelErr != nil {
|
|
log.Printf("error cancelling ffmpegreader: %v", cancelErr)
|
|
}
|
|
}
|
|
|
|
if readerErr := s.ffmpegReader.Close(); readerErr != nil {
|
|
if err == nil {
|
|
err = readerErr
|
|
}
|
|
}
|
|
|
|
var framesUploaded int64
|
|
if err == nil {
|
|
if bytesUploaded, uploaderErr := s.uploader.Complete(); uploaderErr != nil {
|
|
err = uploaderErr
|
|
} else {
|
|
framesUploaded = bytesUploaded / int64(s.channels) / SizeOfInt16
|
|
}
|
|
}
|
|
|
|
if err == nil {
|
|
_, updateErr := s.store.SetAudioUploaded(ctx, store.SetAudioUploadedParams{
|
|
ID: mediaSetID,
|
|
AudioS3Bucket: sqlString(s.s3Bucket),
|
|
AudioS3Key: sqlString(s.s3Key),
|
|
AudioFrames: sqlInt64(framesUploaded),
|
|
})
|
|
|
|
if updateErr != nil {
|
|
err = updateErr
|
|
}
|
|
}
|
|
|
|
if err != nil {
|
|
log.Printf("error in upload flow: %v", err)
|
|
|
|
newCtx, cancel := context.WithTimeout(context.Background(), time.Second*5)
|
|
defer cancel()
|
|
|
|
if abortUploadErr := s.uploader.Abort(newCtx); abortUploadErr != nil {
|
|
log.Printf("error aborting uploader: %v", abortUploadErr)
|
|
}
|
|
s.Abort(err)
|
|
return
|
|
}
|
|
|
|
if iterErr := s.Close(); iterErr != nil {
|
|
log.Printf("error closing progress iterator: %v", iterErr)
|
|
}
|
|
}
|
|
|
|
func sqlString(s string) sql.NullString {
|
|
return sql.NullString{String: s, Valid: true}
|
|
}
|
|
|
|
func sqlInt64(i int64) sql.NullInt64 {
|
|
return sql.NullInt64{Int64: i, Valid: true}
|
|
}
|
|
|
|
type ModuloBufReader struct {
|
|
io.ReadCloser
|
|
|
|
buf bytes.Buffer
|
|
modSize int
|
|
}
|
|
|
|
func NewModuloBufReader(r io.ReadCloser, modSize int) *ModuloBufReader {
|
|
return &ModuloBufReader{ReadCloser: r, modSize: modSize}
|
|
}
|
|
|
|
func (r *ModuloBufReader) Read(p []byte) (int, error) {
|
|
// err is always io.EOF or nil
|
|
nr1, _ := r.buf.Read(p)
|
|
nr2, err := r.ReadCloser.Read(p[nr1:])
|
|
|
|
nr := nr1 + nr2
|
|
rem := nr % r.modSize
|
|
if rem != 0 {
|
|
// err is always nil
|
|
_, _ = r.buf.Write(p[nr-rem:])
|
|
}
|
|
|
|
return nr - rem, err
|
|
}
|