revid: pid for audio being written to mts packets

cmd/revid-cli/main.go

@@ -62,7 +62,7 @@ const (
 	defaultLogVerbosity = logger.Info
 	defaultSleepTime    = 60    // Seconds
 	sampleSize          = 2     // Bytes
-	blockSize           = 16000 // Bytes
+	chunkSize           = 16000 // Bytes
 )
 
 // canProfile is set to false with revid-cli is built with "-tags profile".
@@ -195,7 +195,7 @@ func handleFlags() revid.Config {
 
 	switch *inputPtr {
 	case "Audio":
-		cfg.WriteRate = float64(*sampleRatePtr*sampleSize) / float64(blockSize)
+		cfg.WriteRate = float64(*sampleRatePtr*sampleSize) / float64(chunkSize)
 	default:
 		cfg.WriteRate = float64(*frameRatePtr)
 	}

container/mts/audio_test.go

@@ -43,8 +43,8 @@ func TestEncodePcm(t *testing.T) {
 	var buf bytes.Buffer
 	sampleRate := 48000
 	sampleSize := 2
-	blockSize := 16000
+	chunkSize := 16000
-	writeFreq := float64(sampleRate*sampleSize) / float64(blockSize)
+	writeFreq := float64(sampleRate*sampleSize) / float64(chunkSize)
 	e := NewEncoder(&buf, writeFreq, Audio)
 
 	inPath := "../../../test/test-data/av/input/sweep_400Hz_20000Hz_-3dBFS_5s_48khz.pcm"
@@ -54,15 +54,15 @@ func TestEncodePcm(t *testing.T) {
 	}
 
 	// Break pcm into blocks and encode to mts and get the resulting bytes.
-	for i := 0; i < len(inPcm); i += blockSize {
+	for i := 0; i < len(inPcm); i += chunkSize {
-		if len(inPcm)-i < blockSize {
+		if len(inPcm)-i < chunkSize {
 			block := inPcm[i:]
 			_, err = e.Write(block)
 			if err != nil {
 				t.Errorf("unable to write block: %v", err)
 			}
 		} else {
-			block := inPcm[i : i+blockSize]
+			block := inPcm[i : i+chunkSize]
 			_, err = e.Write(block)
 			if err != nil {
 				t.Errorf("unable to write block: %v", err)
@@ -73,7 +73,7 @@ func TestEncodePcm(t *testing.T) {
 
 	// Get the first MTS packet to check
 	var pkt packet.Packet
-	pesPacket := make([]byte, 0, blockSize)
+	pesPacket := make([]byte, 0, chunkSize)
 	got := make([]byte, 0, len(inPcm))
 	i := 0
 	if i+PacketSize <= len(clip) {

container/mts/encoder.go

@@ -103,7 +103,8 @@ const (
 	patPid   = 0
 	pmtPid   = 4096
 	videoPid = 256
-	audioPid      = 210
+	// AudioPid is the Id for packets containing audio data
+	AudioPid      = 210
 	videoStreamID = 0xe0 // First video stream ID.
 	audioStreamID = 0xc0 // First audio stream ID.
 )
@@ -154,7 +155,7 @@ func NewEncoder(dst io.Writer, rate float64, mediaType int) *Encoder {
 	var sid byte
 	switch mediaType {
 	case Audio:
-		mPid = audioPid
+		mPid = AudioPid
 		sid = audioStreamID
 	case Video:
 		mPid = videoPid
@@ -248,7 +249,9 @@ func (e *Encoder) Write(data []byte) (int, error) {
 			pkt.PCR = e.pcr()
 			pusi = false
 		}
-		_, err := e.dst.Write(pkt.Bytes(e.tsSpace[:PacketSize]))
+		bytes := pkt.Bytes(e.tsSpace[:PacketSize])
+		fmt.Printf("Packet: %v", bytes)
+		_, err := e.dst.Write(bytes)
 		if err != nil {
 			return len(data), err
 		}

revid/revid.go

@@ -187,7 +187,7 @@ func (r *Revid) setConfig(config Config) error {
 // mtsEnc and flvEnc will be called to obtain an mts encoder and flv encoder
 // respectively. multiWriter will be used to create an ioext.multiWriteCloser
 // so that encoders can write to multiple senders.
-func (r *Revid) setupPipeline(mtsEnc, flvEnc func(dst io.Writer, rate int) (io.Writer, error), multiWriter func(...io.WriteCloser) io.WriteCloser) error {
+func (r *Revid) setupPipeline(mtsEnc func(dst io.Writer, rate, mediaType int) (io.Writer, error), flvEnc func(dst io.Writer, rate int) (io.Writer, error), multiWriter func(...io.WriteCloser) io.WriteCloser) error {
 	r.buffer = (*buffer)(ring.NewBuffer(ringBufferSize, ringBufferElementSize, writeTimeout))
 
 	r.encoder = r.encoder[:0]
@@ -231,7 +231,13 @@ func (r *Revid) setupPipeline(mtsEnc, flvEnc func(dst io.Writer, rate int) (io.W
 	// as a destination.
 	if len(mtsSenders) != 0 {
 		mw := multiWriter(mtsSenders...)
-		e, _ := mtsEnc(mw, int(r.config.FrameRate))
+		var mediaType int
+		if r.config.Input == Audio {
+			mediaType = mts.Audio
+		} else {
+			mediaType = mts.Video
+		}
+		e, _ := mtsEnc(mw, int(r.config.WriteRate), mediaType)
 		r.encoder = append(r.encoder, e)
 	}
 
@@ -275,8 +281,8 @@ func (r *Revid) setupPipeline(mtsEnc, flvEnc func(dst io.Writer, rate int) (io.W
 	return nil
 }
 
-func newMtsEncoder(dst io.Writer, fps int) (io.Writer, error) {
+func newMtsEncoder(dst io.Writer, writeRate, mediaType int) (io.Writer, error) {
-	e := mts.NewEncoder(dst, float64(fps), mts.Video)
+	e := mts.NewEncoder(dst, float64(writeRate), mediaType)
 	return e, nil
 }