Refactor audio fetching logic

backend/media/audio_progress.go

@@ -1,125 +0,0 @@
-package media
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"math"
-)
-
-type GetAudioProgress struct {
-	PercentComplete float32
-	Peaks           []int16
-}
-
-type GetAudioProgressReader interface {
-	Read() (GetAudioProgress, error)
-	Close() error
-}
-
-// getAudioProgressReader accepts a byte stream containing little endian
-// signed int16s and, given a target number of bins, emits a stream of peaks
-// corresponding to each channel of the audio data.
-type getAudioProgressReader struct {
-	framesExpected int64
-	channels       int
-	framesPerBin   int
-
-	samples         []int16
-	currPeaks       []int16
-	currCount       int
-	framesProcessed int64
-	progress        chan GetAudioProgress
-	errorChan       chan error
-}
-
-func newGetAudioProgressReader(framesExpected int64, channels, numBins int) (*getAudioProgressReader, error) {
-	if framesExpected <= 0 || channels <= 0 || numBins <= 0 {
-		return nil, fmt.Errorf("error creating audio progress reader (framesExpected = %d, channels = %d, numBins = %d)", framesExpected, channels, numBins)
-	}
-
-	return &getAudioProgressReader{
-		channels:       channels,
-		framesExpected: framesExpected,
-		framesPerBin:   int(math.Ceil(float64(framesExpected) / float64(numBins))),
-		samples:        make([]int16, 8_192),
-		currPeaks:      make([]int16, channels),
-		progress:       make(chan GetAudioProgress),
-		errorChan:      make(chan error, 1),
-	}, nil
-}
-
-func (w *getAudioProgressReader) Abort(err error) {
-	w.errorChan <- err
-}
-
-func (w *getAudioProgressReader) Close() error {
-	close(w.progress)
-	return nil
-}
-
-func (w *getAudioProgressReader) Read() (GetAudioProgress, error) {
-	for {
-		select {
-		case progress, ok := <-w.progress:
-			if !ok {
-				return GetAudioProgress{Peaks: w.currPeaks, PercentComplete: w.percentComplete()}, io.EOF
-			}
-			return progress, nil
-		case err := <-w.errorChan:
-			return GetAudioProgress{}, fmt.Errorf("error waiting for progress: %v", err)
-		}
-	}
-}
-
-func (w *getAudioProgressReader) Write(p []byte) (int, error) {
-	// expand our target slice if it is of insufficient size:
-	numSamples := len(p) / SizeOfInt16
-	if len(w.samples) < numSamples {
-		w.samples = append(w.samples, make([]int16, numSamples-len(w.samples))...)
-	}
-
-	samples := w.samples[:numSamples]
-
-	if err := binary.Read(bytes.NewReader(p), binary.LittleEndian, samples); err != nil {
-		return 0, fmt.Errorf("error parsing samples: %v", err)
-	}
-
-	for i := 0; i < len(samples); i += w.channels {
-		for j := 0; j < w.channels; j++ {
-			samp := samples[i+j]
-			if samp < 0 {
-				samp = -samp
-			}
-			if samp > w.currPeaks[j] {
-				w.currPeaks[j] = samp
-			}
-		}
-		w.currCount++
-		if w.currCount == w.framesPerBin {
-			w.nextBin()
-		}
-	}
-
-	w.framesProcessed += int64(len(samples) / w.channels)
-
-	return len(p), nil
-}
-
-func (w *getAudioProgressReader) percentComplete() float32 {
-	return (float32(w.framesProcessed) / float32(w.framesExpected)) * 100.0
-}
-
-func (w *getAudioProgressReader) nextBin() {
-	var progress GetAudioProgress
-	progress.Peaks = append(progress.Peaks, w.currPeaks...)
-	progress.PercentComplete = w.percentComplete()
-
-	w.progress <- progress
-
-	w.currCount = 0
-	for i := 0; i < len(w.currPeaks); i++ {
-		w.currPeaks[i] = 0
-	}
-}

backend/media/ffmpeg_reader.go

@@ -1,56 +0,0 @@
-package media
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"os/exec"
-)
-
-type ffmpegReader struct {
-	io.ReadCloser
-
-	cmd       *exec.Cmd
-	stdErrBuf *bytes.Buffer
-}
-
-func newFfmpegReader(ctx context.Context, input io.Reader, arg ...string) (*ffmpegReader, error) {
-	var stdErr bytes.Buffer
-
-	cmd := exec.CommandContext(ctx, "ffmpeg", arg...)
-	cmd.Stdin = input
-	cmd.Stderr = &stdErr
-
-	r, err := cmd.StdoutPipe()
-	if err != nil {
-		return nil, fmt.Errorf("error creating pipe: %v", err)
-	}
-
-	if err := cmd.Start(); err != nil {
-		return nil, fmt.Errorf("error starting ffmpeg: %v, output: %s", err, stdErr.String())
-	}
-
-	return &ffmpegReader{ReadCloser: r, cmd: cmd, stdErrBuf: &stdErr}, nil
-}
-
-func (r *ffmpegReader) Cancel() error {
-	if err := r.cmd.Process.Kill(); err != nil {
-		return fmt.Errorf("error killing ffmpeg process: %v", err)
-	}
-	return nil
-}
-
-func (r *ffmpegReader) Close() error {
-	state, err := r.cmd.Process.Wait()
-
-	if err != nil {
-		return fmt.Errorf("error returned from ffmpeg process: %v", err)
-	}
-
-	if state.ExitCode() != 0 {
-		return fmt.Errorf("non-zero status %d returned from ffmpeg process, output: %s", state.ExitCode(), r.stdErrBuf.String())
-	}
-
-	return nil
-}

backend/media/get_audio.go

@@ -0,0 +1,240 @@
+package media
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+	"os/exec"
+	"strconv"
+
+	"git.netflux.io/rob/clipper/config"
+	"git.netflux.io/rob/clipper/generated/store"
+	"go.uber.org/zap"
+)
+
+type GetAudioProgress struct {
+	PercentComplete float32
+	Peaks           []int16
+}
+
+type GetAudioProgressReader interface {
+	Next() (GetAudioProgress, error)
+	Close() error
+}
+
+// audioGetter manages getting and processing audio from Youtube.
+type audioGetter struct {
+	store   Store
+	youtube YoutubeClient
+	s3API   S3API
+	config  config.Config
+	logger  *zap.SugaredLogger
+}
+
+// newAudioGetter returns a new audioGetter.
+func newAudioGetter(store Store, youtube YoutubeClient, s3API S3API, config config.Config, logger *zap.SugaredLogger) *audioGetter {
+	return &audioGetter{
+		store:   store,
+		youtube: youtube,
+		s3API:   s3API,
+		config:  config,
+		logger:  logger,
+	}
+}
+
+// GetAudio gets the audio, processes it and uploads it to S3. It returns a
+// GetAudioProgressReader that can be used to poll progress reports and audio
+// peaks.
+//
+// TODO: accept domain object instead
+func (g *audioGetter) GetAudio(ctx context.Context, mediaSet store.MediaSet, numBins int) (GetAudioProgressReader, error) {
+	video, err := g.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 := g.youtube.GetStreamContext(ctx, video, format)
+	if err != nil {
+		return nil, fmt.Errorf("error fetching stream: %v", err)
+	}
+
+	audioProgressReader, err := newGetAudioProgressReader(mediaSet.AudioFramesApprox, int(mediaSet.AudioChannels), numBins)
+	if err != nil {
+		return nil, fmt.Errorf("error building progress reader: %v", err)
+	}
+
+	s := &audioGetterState{
+		audioGetter:            g,
+		getAudioProgressReader: audioProgressReader,
+	}
+	go s.getAudio(ctx, stream, mediaSet)
+
+	return s, nil
+}
+
+// audioGetterState represents the state of an individual audio fetch.
+type audioGetterState struct {
+	*audioGetter
+	*getAudioProgressReader
+}
+
+func (s *audioGetterState) getAudio(ctx context.Context, r io.ReadCloser, mediaSet store.MediaSet) {
+	defer s.Close()
+	defer r.Close()
+
+	streamWithProgress := newProgressReader(r, "audio", mediaSet.AudioContentLength, s.logger)
+
+	var stdErr bytes.Buffer
+	cmd := exec.CommandContext(ctx, "ffmpeg", "-hide_banner", "-loglevel", "error", "-i", "-", "-f", rawAudioFormat, "-ar", strconv.Itoa(rawAudioSampleRate), "-acodec", rawAudioCodec, "-")
+	cmd.Stdin = streamWithProgress
+	cmd.Stderr = &stdErr
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		s.CloseWithError(fmt.Errorf("error getting stdout: %v", err))
+		return
+	}
+	if err = cmd.Start(); err != nil {
+		s.CloseWithError(fmt.Errorf("error starting command: %v", err))
+		return
+	}
+
+	// TODO: use mediaSet func to fetch s3Key
+	s3Key := fmt.Sprintf("media_sets/%s/audio.raw", mediaSet.ID)
+
+	teeReader := io.TeeReader(stdout, s)
+	uploader := newMultipartUploader(s.s3API, s.logger)
+	bytesUploaded, err := uploader.Upload(ctx, teeReader, s.config.S3Bucket, s3Key, rawAudioMimeType)
+	if err != nil {
+		s.CloseWithError(fmt.Errorf("error uploading audio: %v", err))
+		return
+	}
+
+	if _, err = s.store.SetAudioUploaded(ctx, store.SetAudioUploadedParams{
+		ID:            mediaSet.ID,
+		AudioS3Bucket: sqlString(s.config.S3Bucket),
+		AudioS3Key:    sqlString(s3Key),
+		AudioFrames:   sqlInt64(bytesUploaded / SizeOfInt16 / int64(mediaSet.AudioChannels)),
+	}); err != nil {
+		s.CloseWithError(fmt.Errorf("error setting audio uploaded: %v", err))
+		return
+	}
+
+	if err = cmd.Wait(); err != nil {
+		s.CloseWithError(fmt.Errorf("error waiting for command: %v", err))
+		return
+	}
+}
+
+// getAudioProgressReader accepts a byte stream containing little endian
+// signed int16s and, given a target number of bins, emits a stream of peaks
+// corresponding to each channel of the audio data.
+type getAudioProgressReader struct {
+	framesExpected int64
+	channels       int
+	framesPerBin   int
+
+	samples         []int16
+	currPeaks       []int16
+	currCount       int
+	framesProcessed int64
+	progress        chan GetAudioProgress
+	errorChan       chan error
+}
+
+func newGetAudioProgressReader(framesExpected int64, channels, numBins int) (*getAudioProgressReader, error) {
+	if framesExpected <= 0 || channels <= 0 || numBins <= 0 {
+		return nil, fmt.Errorf("error creating audio progress reader (framesExpected = %d, channels = %d, numBins = %d)", framesExpected, channels, numBins)
+	}
+
+	return &getAudioProgressReader{
+		channels:       channels,
+		framesExpected: framesExpected,
+		framesPerBin:   int(math.Ceil(float64(framesExpected) / float64(numBins))),
+		samples:        make([]int16, 8_192),
+		currPeaks:      make([]int16, channels),
+		progress:       make(chan GetAudioProgress),
+		errorChan:      make(chan error, 1),
+	}, nil
+}
+
+func (w *getAudioProgressReader) CloseWithError(err error) {
+	w.errorChan <- err
+}
+
+func (w *getAudioProgressReader) Close() error {
+	close(w.progress)
+	return nil
+}
+
+func (w *getAudioProgressReader) Next() (GetAudioProgress, error) {
+	for {
+		select {
+		case progress, ok := <-w.progress:
+			if !ok {
+				return GetAudioProgress{Peaks: w.currPeaks, PercentComplete: w.percentComplete()}, io.EOF
+			}
+			return progress, nil
+		case err := <-w.errorChan:
+			return GetAudioProgress{}, fmt.Errorf("error waiting for progress: %v", err)
+		}
+	}
+}
+
+func (w *getAudioProgressReader) Write(p []byte) (int, error) {
+	// expand our target slice if it is of insufficient size:
+	numSamples := len(p) / SizeOfInt16
+	if len(w.samples) < numSamples {
+		w.samples = append(w.samples, make([]int16, numSamples-len(w.samples))...)
+	}
+
+	samples := w.samples[:numSamples]
+
+	if err := binary.Read(bytes.NewReader(p), binary.LittleEndian, samples); err != nil {
+		return 0, fmt.Errorf("error parsing samples: %v", err)
+	}
+
+	for i := 0; i < len(samples); i += w.channels {
+		for j := 0; j < w.channels; j++ {
+			samp := samples[i+j]
+			if samp < 0 {
+				samp = -samp
+			}
+			if samp > w.currPeaks[j] {
+				w.currPeaks[j] = samp
+			}
+		}
+		w.currCount++
+		if w.currCount == w.framesPerBin {
+			w.nextBin()
+		}
+	}
+
+	w.framesProcessed += int64(len(samples) / w.channels)
+
+	return len(p), nil
+}
+
+func (w *getAudioProgressReader) percentComplete() float32 {
+	return (float32(w.framesProcessed) / float32(w.framesExpected)) * 100.0
+}
+
+func (w *getAudioProgressReader) nextBin() {
+	var progress GetAudioProgress
+	progress.Peaks = append(progress.Peaks, w.currPeaks...)
+	progress.PercentComplete = w.percentComplete()
+
+	w.progress <- progress
+
+	w.currCount = 0
+	for i := 0; i < len(w.currPeaks); i++ {
+		w.currPeaks[i] = 0
+	}
+}

backend/media/get_video.go

@@ -17,6 +17,12 @@ type GetVideoProgress struct {
 	URL             string
 }
 
+type GetVideoProgressReader interface {
+	// Next returns the next video progress status. When the stream has finished,
+	// a valid GetVideoProgress value will be returned with io.EOF.
+	Next() (GetVideoProgress, error)
+}
+
 type videoGetter struct {
 	s3     S3API
 	store  Store
@@ -62,7 +68,8 @@ func (g *videoGetter) GetVideo(ctx context.Context, r io.Reader, exp int64, medi
 	return s, nil
 }
 
-// Write implements io.Writer.
+// Write implements io.Writer. It is copied that same data that is written to
+// S3, to implement progress tracking.
 func (s *videoGetterState) Write(p []byte) (int, error) {
 	s.count += int64(len(p))
 	pc := (float32(s.count) / float32(s.exp)) * 100

backend/media/media_set.go

@@ -10,25 +10,25 @@ import (
 const SizeOfInt16 = 2
 
 type Audio struct {
-	Bytes    int64 `json:"bytes"`
+	ContentLength int64
-	Channels int   `json:"channels"`
+	Channels      int
 	// ApproxFrames is used during initial processing when a precise frame count
 	// cannot be determined. Prefer Frames in all other cases.
-	ApproxFrames int64  `json:"approx_frames"`
+	ApproxFrames int64
-	Frames       int64  `json:"frames"`
+	Frames       int64
-	SampleRate   int    `json:"sample_rate"`
+	SampleRate   int
-	YoutubeItag  int    `json:"youtube_itag"`
+	YoutubeItag  int
-	MimeType     string `json:"mime_type"`
+	MimeType     string
 }
 
 type Video struct {
-	Bytes    int64         `json:"bytes"`
+	ContentLength int64
-	Duration time.Duration `json:"duration"`
+	Duration      time.Duration
 	// not sure if this are needed any more?
-	ThumbnailWidth  int    `json:"thumbnail_width"`
+	ThumbnailWidth  int
-	ThumbnailHeight int    `json:"thumbnail_height"`
+	ThumbnailHeight int
-	YoutubeItag     int    `json:"youtube_itag"`
+	YoutubeItag     int
-	MimeType        string `json:"mime_type"`
+	MimeType        string
 }
 
 // MediaSet represents the media and metadata associated with a single media

backend/media/service.go

@@ -169,7 +169,9 @@ func (s *MediaSetService) createMediaSet(ctx context.Context, youtubeID string)
 		AudioFramesApprox:    audioMetadata.ApproxFrames,
 		AudioSampleRate:      int32(audioMetadata.SampleRate),
 		AudioMimeTypeEncoded: audioMetadata.MimeType,
+		AudioContentLength:   audioMetadata.ContentLength,
 		VideoYoutubeItag:     int32(videoMetadata.YoutubeItag),
+		VideoContentLength:   videoMetadata.ContentLength,
 		VideoMimeType:        videoMetadata.MimeType,
 		VideoDurationNanos:   videoMetadata.Duration.Nanoseconds(),
 	}
@@ -201,7 +203,7 @@ func (s *MediaSetService) findMediaSet(ctx context.Context, youtubeID string) (*
 		YoutubeID: mediaSet.YoutubeID,
 		Audio: Audio{
 			YoutubeItag:   int(mediaSet.AudioYoutubeItag),
-			Bytes:        0, // DEPRECATED
+			ContentLength: mediaSet.AudioContentLength,
 			Channels:      int(mediaSet.AudioChannels),
 			ApproxFrames:  int64(mediaSet.AudioFramesApprox),
 			Frames:        mediaSet.AudioFrames.Int64,
@@ -210,7 +212,7 @@ func (s *MediaSetService) findMediaSet(ctx context.Context, youtubeID string) (*
 		},
 		Video: Video{
 			YoutubeItag:     int(mediaSet.VideoYoutubeItag),
-			Bytes:           0, // DEPRECATED?
+			ContentLength:   mediaSet.VideoContentLength,
 			Duration:        time.Duration(mediaSet.VideoDurationNanos),
 			MimeType:        mediaSet.VideoMimeType,
 			ThumbnailWidth:  0, // ??
@@ -234,7 +236,7 @@ func (s *MediaSetService) fetchVideoMetadata(ctx context.Context, video *youtube
 	return Video{
 		YoutubeItag:     format.ItagNo,
 		MimeType:        format.MimeType,
-		Bytes:           format.ContentLength,
+		ContentLength:   format.ContentLength,
 		ThumbnailWidth:  thumbnailWidth,
 		ThumbnailHeight: thumbnailHeight,
 		Duration:        time.Duration(durationMsecs) * time.Millisecond,
@@ -261,6 +263,7 @@ func (s *MediaSetService) fetchAudioMetadata(ctx context.Context, video *youtube
 	approxFrames := int64(approxDuration/time.Second) * int64(sampleRate)
 
 	return Audio{
+		ContentLength: format.ContentLength,
 		MimeType:      format.MimeType,
 		YoutubeItag:   format.ItagNo,
 		ApproxFrames:  approxFrames,
@@ -316,12 +319,6 @@ func (s *MediaSetService) GetVideo(ctx context.Context, id uuid.UUID) (GetVideoP
 	)
 }
 
-type GetVideoProgressReader interface {
-	// Next returns the next video progress status. When the stream has finished,
-	// a valid GetVideoProgress value will be returned with io.EOF.
-	Next() (GetVideoProgress, error)
-}
-
 // 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)
@@ -336,6 +333,11 @@ func (s *MediaSetService) GetAudio(ctx context.Context, id uuid.UUID, numBins in
 	return s.getAudioFromYoutube(ctx, mediaSet, numBins)
 }
 
+func (s *MediaSetService) getAudioFromYoutube(ctx context.Context, mediaSet store.MediaSet, numBins int) (GetAudioProgressReader, error) {
+	audioGetter := newAudioGetter(s.store, s.youtube, s.s3, s.config, s.logger)
+	return audioGetter.GetAudio(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),
@@ -400,7 +402,7 @@ outer:
 
 	if err != nil {
 		s.logger.Errorf("getAudioFromS3State: error closing s3 reader: %v", err)
-		s.Abort(err)
+		s.CloseWithError(err)
 		return
 	}
 
@@ -409,113 +411,6 @@ outer:
 	}
 }
 
-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)
-	}
-
-	streamWithProgress := newProgressReader(stream, "audio", format.ContentLength, s.logger)
-
-	ffmpegReader, err := newFfmpegReader(ctx, streamWithProgress, "-hide_banner", "-loglevel", "error", "-i", "-", "-f", rawAudioFormat, "-ar", strconv.Itoa(rawAudioSampleRate), "-acodec", rawAudioCodec, "-")
-	if err != nil {
-		return nil, fmt.Errorf("error creating ffmpegreader: %v", err)
-	}
-
-	// TODO: use mediaSet func to fetch s3Key
-	s3Key := fmt.Sprintf("media_sets/%s/audio.raw", mediaSet.ID)
-	uploader := newMultipartUploader(s.s3, s.logger)
-
-	getAudioProgressReader, err := newGetAudioProgressReader(
-		int64(mediaSet.AudioFramesApprox),
-		format.AudioChannels,
-		numBins,
-	)
-	if err != nil {
-		return nil, fmt.Errorf("error creating audio reader: %v", err)
-	}
-
-	state := getAudioFromYoutubeState{
-		getAudioProgressReader: getAudioProgressReader,
-		ffmpegReader:           ffmpegReader,
-		uploader:               uploader,
-		s3Bucket:               s.config.S3Bucket,
-		s3Key:                  s3Key,
-		store:                  s.store,
-		channels:               format.AudioChannels,
-		logger:                 s.logger,
-	}
-	go state.run(ctx, mediaSet.ID)
-
-	return &state, nil
-}
-
-type getAudioFromYoutubeState struct {
-	*getAudioProgressReader
-
-	ffmpegReader    *ffmpegReader
-	uploader        *multipartUploader
-	s3Bucket, s3Key string
-	store           Store
-	channels        int
-	logger          *zap.SugaredLogger
-}
-
-func (s *getAudioFromYoutubeState) run(ctx context.Context, mediaSetID uuid.UUID) {
-	teeReader := io.TeeReader(s.ffmpegReader, s)
-	bytesUploaded, err := s.uploader.Upload(ctx, teeReader, s.s3Bucket, s.s3Key, rawAudioMimeType)
-
-	// If there was an error returned, the underlying ffmpegReader process may
-	// still be active. Kill it.
-	if err != nil {
-		if cancelErr := s.ffmpegReader.Cancel(); cancelErr != nil {
-			s.logger.Errorf("getAudioFromYoutubeState: error cancelling ffmpegreader: %v", cancelErr)
-		}
-	}
-
-	// Either way, we need to wait for the ffmpegReader process to exit,
-	// and ensure there is no error.
-	if readerErr := s.ffmpegReader.Close(); readerErr != nil {
-		if err == nil {
-			err = readerErr
-		}
-	}
-
-	if err == nil {
-		_, updateErr := s.store.SetAudioUploaded(ctx, store.SetAudioUploadedParams{
-			ID:            mediaSetID,
-			AudioS3Bucket: sqlString(s.s3Bucket),
-			AudioS3Key:    sqlString(s.s3Key),
-			AudioFrames:   sqlInt64(bytesUploaded / SizeOfInt16 / int64(s.channels)),
-		})
-
-		if updateErr != nil {
-			err = updateErr
-		}
-	}
-
-	if err != nil {
-		s.logger.Errorf("getAudioFromYoutubeState: error uploading asynchronously: %v", err)
-
-		s.Abort(err)
-		return
-	}
-
-	if iterErr := s.Close(); iterErr != nil {
-		s.logger.Errorf("getAudioFromYoutubeState: error closing progress iterator: %v", iterErr)
-	}
-}
-
 func (s *MediaSetService) GetAudioSegment(ctx context.Context, id uuid.UUID, startFrame, endFrame int64, numBins int) ([]int16, error) {
 	mediaSet, err := s.store.GetMediaSet(ctx, id)
 	if err != nil {

backend/server/server.go

@@ -117,7 +117,7 @@ func (c *mediaSetServiceController) GetAudio(request *pbmediaset.GetAudioRequest
 	}
 
 	for {
-		progress, err := reader.Read()
+		progress, err := reader.Next()
 		if err != nil && err != io.EOF {
 			return newResponseError(err)
 		}

backend/sql/migrations/1638182250_add_content_length_columns_to_media_sets.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE media_sets DROP COLUMN video_content_length;
+ALTER TABLE media_sets DROP COLUMN audio_content_length;

backend/sql/migrations/1638182250_add_content_length_columns_to_media_sets.up.sql

@@ -0,0 +1,5 @@
+ALTER TABLE media_sets ADD COLUMN audio_content_length bigint NOT NULL;
+ALTER TABLE media_sets ADD COLUMN video_content_length bigint NOT NULL;
+
+ALTER TABLE media_sets ADD CONSTRAINT check_audio_content_length_gt_0 CHECK (audio_content_length > 0);
+ALTER TABLE media_sets ADD CONSTRAINT check_video_content_length_gt_0 CHECK (video_content_length > 0);

backend/sql/queries.sql

@@ -5,8 +5,8 @@ SELECT * FROM media_sets WHERE id = $1;
 SELECT * FROM media_sets WHERE youtube_id = $1;
 
 -- name: CreateMediaSet :one
-INSERT INTO media_sets (youtube_id, audio_youtube_itag, audio_channels, audio_frames_approx, audio_sample_rate, audio_mime_type_encoded, video_youtube_itag, video_mime_type, video_duration_nanos, created_at, updated_at)
+INSERT INTO media_sets (youtube_id, audio_youtube_itag, audio_channels, audio_frames_approx, audio_sample_rate, audio_content_length, audio_mime_type_encoded, video_youtube_itag, video_content_length, video_mime_type, video_duration_nanos, created_at, updated_at)
-  VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, NOW(), NOW())
+  VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, NOW(), NOW())
   RETURNING *;
 
 -- name: SetAudioUploaded :one