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Implement Audio & Video using custom StreamManager.

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This commit is contained in:
Miroslav Šedivý 2021-02-04 20:39:48 +00:00
parent b488f01b16
commit 7902d7b1f1
5 changed files with 229 additions and 196 deletions
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157
internal/capture/manager.go
View File

@ -3,45 +3,36 @@ package capture
import (
"sync"
"github.com/kataras/go-events"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"demodesk/neko/internal/types"
"demodesk/neko/internal/types/codec"
"demodesk/neko/internal/config"
"demodesk/neko/internal/capture/gst"
)
type CaptureManagerCtx struct {
logger zerolog.Logger
mu sync.Mutex
video *gst.Pipeline
audio *gst.Pipeline
config *config.Capture
emit_update chan bool
emit_stop chan bool
video_sample chan types.Sample
audio_sample chan types.Sample
emmiter events.EventEmmiter
streaming bool
desktop types.DesktopManager
streaming bool
broadcast *BroacastManagerCtx
screencast *ScreencastManagerCtx
audio *StreamManagerCtx
video *StreamManagerCtx
}
func New(desktop types.DesktopManager, config *config.Capture) *CaptureManagerCtx {
return &CaptureManagerCtx{
logger: log.With().Str("module", "capture").Logger(),
mu: sync.Mutex{},
emit_update: make(chan bool),
emit_stop: make(chan bool),
emmiter: events.New(),
config: config,
streaming: false,
desktop: desktop,
streaming: false,
broadcast: broadcastNew(config),
screencast: screencastNew(config),
audio: streamNew(config.AudioCodec, config.Device, config.AudioParams),
video: streamNew(config.VideoCodec, config.Display, config.VideoParams),
}
}
@ -53,8 +44,8 @@ func (manager *CaptureManagerCtx) Start() {
}
manager.desktop.OnBeforeScreenSizeChange(func() {
if manager.Streaming() {
manager.destroyVideoPipeline()
if manager.video.Enabled() {
manager.video.destroyPipeline()
}
if manager.broadcast.Enabled() {
@ -67,8 +58,10 @@ func (manager *CaptureManagerCtx) Start() {
})
manager.desktop.OnAfterScreenSizeChange(func() {
if manager.Streaming() {
manager.createVideoPipeline()
if manager.video.Enabled() {
if err := manager.video.createPipeline(); err != nil {
manager.logger.Panic().Err(err).Msg("unable to recreate video pipeline")
}
}
if manager.broadcast.Enabled() {
@ -83,38 +76,16 @@ func (manager *CaptureManagerCtx) Start() {
}
}
})
go func() {
manager.logger.Debug().Msg("started emitting samples")
for {
select {
case <-manager.emit_stop:
manager.logger.Debug().Msg("stopped emitting samples")
return
case <-manager.emit_update:
manager.logger.Debug().Msg("update emitting samples")
case sample := <-manager.video_sample:
manager.emmiter.Emit("video", sample)
case sample := <-manager.audio_sample:
manager.emmiter.Emit("audio", sample)
}
}
}()
}
func (manager *CaptureManagerCtx) Shutdown() error {
manager.logger.Info().Msgf("capture shutting down")
if manager.Streaming() {
manager.StopStream()
}
manager.broadcast.destroyPipeline()
manager.screencast.destroyPipeline()
manager.emit_stop <- true
manager.screencast.shutdown <- true
manager.audio.Shutdown()
manager.video.Shutdown()
return nil
}
@ -126,34 +97,22 @@ func (manager *CaptureManagerCtx) Screencast() types.ScreencastManager {
return manager.screencast
}
func (manager *CaptureManagerCtx) VideoCodec() codec.RTPCodec {
return manager.config.VideoCodec
func (manager *CaptureManagerCtx) Audio() types.StreamManager {
return manager.audio
}
func (manager *CaptureManagerCtx) AudioCodec() codec.RTPCodec {
return manager.config.AudioCodec
}
func (manager *CaptureManagerCtx) OnVideoFrame(listener func(sample types.Sample)) {
manager.emmiter.On("video", func(payload ...interface{}) {
listener(payload[0].(types.Sample))
})
}
func (manager *CaptureManagerCtx) OnAudioFrame(listener func(sample types.Sample)) {
manager.emmiter.On("audio", func(payload ...interface{}) {
listener(payload[0].(types.Sample))
})
func (manager *CaptureManagerCtx) Video() types.StreamManager {
return manager.video
}
func (manager *CaptureManagerCtx) StartStream() {
manager.mu.Lock()
defer manager.mu.Unlock()
manager.logger.Info().Msgf("starting pipelines")
manager.logger.Info().Msgf("starting stream pipelines")
manager.createVideoPipeline()
manager.createAudioPipeline()
manager.Video().Start()
manager.Audio().Start()
manager.streaming = true
}
@ -161,10 +120,10 @@ func (manager *CaptureManagerCtx) StopStream() {
manager.mu.Lock()
defer manager.mu.Unlock()
manager.logger.Info().Msgf("stopping pipelines")
manager.logger.Info().Msgf("stopping stream pipelines")
manager.destroyVideoPipeline()
manager.destroyAudioPipeline()
manager.Video().Stop()
manager.Audio().Stop()
manager.streaming = false
}
@ -174,71 +133,3 @@ func (manager *CaptureManagerCtx) Streaming() bool {
return manager.streaming
}
func (manager *CaptureManagerCtx) createVideoPipeline() {
var err error
manager.logger.Info().
Str("video_codec", manager.config.VideoCodec.Name).
Str("video_display", manager.config.Display).
Str("video_params", manager.config.VideoParams).
Msgf("creating video pipeline")
manager.video, err = gst.CreateAppPipeline(
manager.config.VideoCodec,
manager.config.Display,
manager.config.VideoParams,
)
if err != nil {
manager.logger.Panic().Err(err).Msg("unable to create video pipeline")
}
manager.logger.Info().
Str("src", manager.video.Src).
Msgf("starting video pipeline")
manager.video.Start()
manager.video_sample = manager.video.Sample
manager.emit_update <-true
}
func (manager *CaptureManagerCtx) destroyVideoPipeline() {
manager.logger.Info().Msgf("stopping video pipeline")
manager.video.Stop()
}
func (manager *CaptureManagerCtx) createAudioPipeline() {
var err error
manager.logger.Info().
Str("audio_codec", manager.config.AudioCodec.Name).
Str("audio_display", manager.config.Device).
Str("audio_params", manager.config.AudioParams).
Msgf("creating audio pipeline")
manager.audio, err = gst.CreateAppPipeline(
manager.config.AudioCodec,
manager.config.Device,
manager.config.AudioParams,
)
if err != nil {
manager.logger.Panic().Err(err).Msg("unable to create audio pipeline")
}
manager.logger.Info().
Str("src", manager.audio.Src).
Msgf("starting audio pipeline")
manager.audio.Start()
manager.audio_sample = manager.audio.Sample
manager.emit_update <-true
}
func (manager *CaptureManagerCtx) destroyAudioPipeline() {
manager.logger.Info().Msgf("stopping audio pipeline")
manager.audio.Stop()
}

126
internal/capture/stream.go Normal file
View File

@ -0,0 +1,126 @@
package capture
import (
"sync"
"github.com/kataras/go-events"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"demodesk/neko/internal/types"
"demodesk/neko/internal/types/codec"
"demodesk/neko/internal/capture/gst"
)
type StreamManagerCtx struct {
logger zerolog.Logger
mu sync.Mutex
codec codec.RTPCodec
pipelineDevice string
pipelineSrc string
pipeline *gst.Pipeline
sample chan types.Sample
emmiter events.EventEmmiter
emitUpdate chan bool
emitStop chan bool
enabled bool
}
func streamNew(codec codec.RTPCodec, pipelineDevice string, pipelineSrc string) *StreamManagerCtx {
manager := &StreamManagerCtx{
logger: log.With().Str("module", "capture").Str("submodule", "stream").Logger(),
mu: sync.Mutex{},
codec: codec,
pipelineDevice: pipelineDevice,
pipelineSrc: pipelineSrc,
emmiter: events.New(),
emitUpdate: make(chan bool),
emitStop: make(chan bool),
enabled: false,
}
go func() {
manager.logger.Debug().Msg("started emitting samples")
for {
select {
case <-manager.emitStop:
manager.logger.Debug().Msg("stopped emitting samples")
return
case <-manager.emitUpdate:
manager.logger.Debug().Msg("update emitting samples")
case sample := <-manager.sample:
manager.emmiter.Emit("sample", sample)
}
}
}()
return manager
}
func (manager *StreamManagerCtx) Shutdown() {
manager.logger.Info().Msgf("shutting down")
manager.destroyPipeline()
manager.emitStop <- true
}
func (manager *StreamManagerCtx) Codec() codec.RTPCodec {
return manager.codec
}
func (manager *StreamManagerCtx) OnSample(listener func(sample types.Sample)) {
manager.emmiter.On("sample", func(payload ...interface{}) {
listener(payload[0].(types.Sample))
})
}
func (manager *StreamManagerCtx) Start() {
manager.enabled = true
manager.createPipeline()
}
func (manager *StreamManagerCtx) Stop() {
manager.enabled = false
manager.destroyPipeline()
}
func (manager *StreamManagerCtx) Enabled() bool {
return manager.enabled
}
func (manager *StreamManagerCtx) createPipeline() error {
var err error
codec := manager.Codec()
manager.logger.Info().
Str("codec", codec.Name).
Str("device", manager.pipelineDevice).
Str("src", manager.pipelineSrc).
Msgf("creating pipeline")
manager.pipeline, err = gst.CreateAppPipeline(codec, manager.pipelineDevice, manager.pipelineSrc)
if err != nil {
return err
}
manager.logger.Info().
Str("src", manager.pipeline.Src).
Msgf("starting pipeline")
manager.pipeline.Start()
manager.sample = manager.pipeline.Sample
manager.emitUpdate <-true
return nil
}
func (manager *StreamManagerCtx) destroyPipeline() {
if manager.pipeline == nil {
return
}
manager.pipeline.Stop()
manager.logger.Info().Msgf("stopping pipeline")
manager.pipeline = nil
}

19
internal/types/capture.go
View File

@ -21,18 +21,25 @@ type ScreencastManager interface {
Image() ([]byte, error)
}
type StreamManager interface {
Shutdown()
Codec() codec.RTPCodec
OnSample(listener func(sample Sample))
Start()
Stop()
Enabled() bool
}
type CaptureManager interface {
Start()
Shutdown() error
Broadcast() BroadcastManager
Screencast() ScreencastManager
VideoCodec() codec.RTPCodec
AudioCodec() codec.RTPCodec
OnVideoFrame(listener func(sample Sample))
OnAudioFrame(listener func(sample Sample))
Audio() StreamManager
Video() StreamManager
StartStream()
StopStream()

45
internal/webrtc/manager.go
View File

@ -20,6 +20,8 @@ import (
func New(desktop types.DesktopManager, capture types.CaptureManager, config *config.WebRTC) *WebRTCManagerCtx {
return &WebRTCManagerCtx{
logger: log.With().Str("module", "webrtc").Logger(),
videoCodec: capture.Video().Codec(),
audioCodec: capture.Audio().Codec(),
desktop: desktop,
capture: capture,
config: config,
@ -41,26 +43,24 @@ func (manager *WebRTCManagerCtx) Start() {
var err error
// create audio track
manager.audioCodec = manager.capture.AudioCodec()
manager.audioTrack, err = webrtc.NewTrackLocalStaticSample(manager.audioCodec.Capability, "audio", "stream")
if err != nil {
manager.logger.Panic().Err(err).Msg("unable to create audio track")
}
manager.capture.OnAudioFrame(func(sample types.Sample) {
manager.capture.Audio().OnSample(func(sample types.Sample) {
if err := manager.audioTrack.WriteSample(media.Sample(sample)); err != nil && err != io.ErrClosedPipe {
manager.logger.Warn().Err(err).Msg("audio pipeline failed to write")
}
})
// create video track
manager.videoCodec = manager.capture.VideoCodec()
manager.videoTrack, err = webrtc.NewTrackLocalStaticSample(manager.videoCodec.Capability, "video", "stream")
if err != nil {
manager.logger.Panic().Err(err).Msg("unable to create video track")
}
manager.capture.OnVideoFrame(func(sample types.Sample) {
manager.capture.Video().OnSample(func(sample types.Sample) {
if err := manager.videoTrack.WriteSample(media.Sample(sample)); err != nil && err != io.ErrClosedPipe {
manager.logger.Warn().Err(err).Msg("video pipeline failed to write")
}
@ -91,6 +91,7 @@ func (manager *WebRTCManagerCtx) ICEServers() []string {
func (manager *WebRTCManagerCtx) CreatePeer(session types.Session) (*webrtc.SessionDescription, error) {
logger := manager.logger.With().Str("id", session.ID()).Logger()
// Create MediaEngine
engine, err := manager.mediaEngine()
if err != nil {
return nil, err
@ -129,7 +130,21 @@ func (manager *WebRTCManagerCtx) CreatePeer(session types.Session) (*webrtc.Sess
})
}
if err := manager.registerTracks(connection); err != nil {
audioTransceiver, err := connection.AddTransceiverFromTrack(manager.audioTrack, webrtc.RtpTransceiverInit{
Direction: webrtc.RTPTransceiverDirectionSendonly,
})
if err != nil {
return nil, err
}
videoTransceiver, err := connection.AddTransceiverFromTrack(manager.videoTrack, webrtc.RtpTransceiverInit{
Direction: webrtc.RTPTransceiverDirectionSendonly,
})
if err != nil {
return nil, err
}
if _, err := connection.CreateDataChannel("data", nil); err != nil {
return nil, err
}
@ -184,13 +199,14 @@ func (manager *WebRTCManagerCtx) CreatePeer(session types.Session) (*webrtc.Sess
settings: settings,
connection: connection,
configuration: configuration,
audioTransceiver: audioTransceiver,
videoTransceiver: videoTransceiver,
})
return connection.LocalDescription(), nil
}
func (manager *WebRTCManagerCtx) mediaEngine() (*webrtc.MediaEngine, error) {
// Create MediaEngine
engine := &webrtc.MediaEngine{}
if err := manager.videoCodec.Register(engine); err != nil {
@ -235,20 +251,3 @@ func (manager *WebRTCManagerCtx) apiConfiguration() *webrtc.Configuration {
SDPSemantics: webrtc.SDPSemanticsUnifiedPlanWithFallback,
}
}
func (manager *WebRTCManagerCtx) registerTracks(connection *webrtc.PeerConnection) error {
if _, err := connection.AddTransceiverFromTrack(manager.videoTrack, webrtc.RtpTransceiverInit{
Direction: webrtc.RTPTransceiverDirectionSendonly,
}); err != nil {
return err
}
if _, err := connection.AddTransceiverFromTrack(manager.audioTrack, webrtc.RtpTransceiverInit{
Direction: webrtc.RTPTransceiverDirectionSendonly,
}); err != nil {
return err
}
_, err := connection.CreateDataChannel("data", nil)
return err
}

10
internal/webrtc/peer.go
View File

@ -8,6 +8,8 @@ type WebRTCPeerCtx struct {
settings *webrtc.SettingEngine
connection *webrtc.PeerConnection
configuration *webrtc.Configuration
audioTransceiver *webrtc.RTPTransceiver
videoTransceiver *webrtc.RTPTransceiver
}
func (webrtc_peer *WebRTCPeerCtx) SignalAnswer(sdp string) error {
@ -21,6 +23,14 @@ func (webrtc_peer *WebRTCPeerCtx) SignalCandidate(candidate webrtc.ICECandidateI
return webrtc_peer.connection.AddICECandidate(candidate)
}
func (webrtc_peer *WebRTCPeerCtx) ReplaceAudioTrack(track webrtc.TrackLocal) error {
return webrtc_peer.audioTransceiver.Sender().ReplaceTrack(track)
}
func (webrtc_peer *WebRTCPeerCtx) ReplaceVideoTrack(track webrtc.TrackLocal) error {
return webrtc_peer.videoTransceiver.Sender().ReplaceTrack(track)
}
func (webrtc_peer *WebRTCPeerCtx) Destroy() error {
if webrtc_peer.connection == nil || webrtc_peer.connection.ConnectionState() != webrtc.PeerConnectionStateConnected {
return nil