neko/internal/capture/manager.go

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package capture
import (
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"fmt"
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"math"
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"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
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"demodesk/neko/internal/config"
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"demodesk/neko/internal/types"
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"demodesk/neko/internal/types/codec"
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)
type CaptureManagerCtx struct {
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logger zerolog.Logger
desktop types.DesktopManager
streaming bool
broadcast *BroacastManagerCtx
screencast *ScreencastManagerCtx
audio *StreamManagerCtx
videos map[string]*StreamManagerCtx
videoIDs []string
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}
func New(desktop types.DesktopManager, config *config.Capture) *CaptureManagerCtx {
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logger := log.With().Str("module", "capture").Logger()
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broadcastPipeline := config.BroadcastPipeline
if broadcastPipeline == "" {
broadcastPipeline = fmt.Sprintf(
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"flvmux name=mux ! rtmpsink location='{url} live=1' "+
"pulsesrc device=%s "+
"! audio/x-raw,channels=2 "+
"! audioconvert "+
"! queue "+
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"! voaacenc bitrate=128000 "+
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"! mux. "+
"ximagesrc display-name=%s show-pointer=true use-damage=false "+
"! video/x-raw "+
"! videoconvert "+
"! queue "+
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"! x264enc threads=4 bitrate=4096 key-int-max=15 byte-stream=true tune=zerolatency speed-preset=veryfast "+
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"! mux.", config.AudioDevice, config.Display,
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)
}
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screencastPipeline := config.ScreencastPipeline
if screencastPipeline == "" {
screencastPipeline = fmt.Sprintf(
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"ximagesrc display-name=%s show-pointer=true use-damage=false "+
"! video/x-raw,framerate=%s "+
"! videoconvert "+
"! queue "+
"! jpegenc quality=%s "+
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"! appsink name=appsink", config.Display, config.ScreencastRate, config.ScreencastQuality,
)
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}
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return &CaptureManagerCtx{
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logger: logger,
desktop: desktop,
streaming: false,
broadcast: broadcastNew(broadcastPipeline),
screencast: screencastNew(config.Screencast, screencastPipeline),
audio: streamNew(config.AudioCodec, func() string {
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if config.AudioPipeline != "" {
return config.AudioPipeline
}
return fmt.Sprintf(
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"pulsesrc device=%s "+
"! audio/x-raw,channels=2 "+
"! audioconvert "+
"! queue "+
"! %s "+
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"! appsink name=appsink", config.AudioDevice, config.AudioCodec.Pipeline,
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)
}),
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videos: map[string]*StreamManagerCtx{
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"hd": streamNew(codec.VP8(), func() string {
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screen := desktop.GetScreenSize()
bitrate := int((screen.Width * screen.Height * 5) / 3)
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return fmt.Sprintf(
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"ximagesrc display-name=%s show-pointer=false use-damage=false "+
"! video/x-raw,framerate=25/1 "+
"! videoconvert "+
"! queue "+
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"! vp8enc end-usage=cbr target-bitrate=%d cpu-used=16 threads=4 deadline=100000 undershoot=95 error-resilient=partitions keyframe-max-dist=15 auto-alt-ref=true min-quantizer=6 max-quantizer=12 "+
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"! appsink name=appsink", config.Display, bitrate,
)
}),
"hq": streamNew(codec.VP8(), func() string {
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screen := desktop.GetScreenSize()
width := int(math.Ceil(float64(screen.Width)/6) * 5)
height := int(math.Ceil(float64(screen.Height)/6) * 5)
bitrate := int((width * height * 5) / 3)
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return fmt.Sprintf(
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"ximagesrc display-name=%s show-pointer=false use-damage=false "+
"! video/x-raw,framerate=25/1 "+
"! videoconvert "+
"! queue "+
"! videoscale "+
"! video/x-raw,width=%d,height=%d "+
"! queue "+
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"! vp8enc end-usage=cbr target-bitrate=%d cpu-used=16 threads=4 deadline=100000 undershoot=95 error-resilient=partitions keyframe-max-dist=15 auto-alt-ref=true min-quantizer=6 max-quantizer=12 "+
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"! appsink name=appsink", config.Display, width, height, bitrate,
)
}),
"mq": streamNew(codec.VP8(), func() string {
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screen := desktop.GetScreenSize()
width := int(math.Ceil(float64(screen.Width)/6) * 4)
height := int(math.Ceil(float64(screen.Height)/6) * 4)
bitrate := int((width * height * 5) / 3)
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return fmt.Sprintf(
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"ximagesrc display-name=%s show-pointer=false use-damage=false "+
"! video/x-raw,framerate=125/10 "+
"! videoconvert "+
"! queue "+
"! videoscale "+
"! video/x-raw,width=%d,height=%d "+
"! queue "+
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"! vp8enc end-usage=cbr target-bitrate=%d cpu-used=16 threads=4 deadline=100000 undershoot=95 error-resilient=partitions keyframe-max-dist=15 auto-alt-ref=true min-quantizer=12 max-quantizer=24 "+
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"! appsink name=appsink", config.Display, width, height, bitrate,
)
}),
"lq": streamNew(codec.VP8(), func() string {
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screen := desktop.GetScreenSize()
width := int(math.Ceil(float64(screen.Width)/6) * 3)
height := int(math.Ceil(float64(screen.Height)/6) * 3)
bitrate := int((width * height * 5) / 3)
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return fmt.Sprintf(
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"ximagesrc display-name=%s show-pointer=false use-damage=false "+
"! video/x-raw,framerate=125/10 "+
"! videoconvert "+
"! queue "+
"! videoscale "+
"! video/x-raw,width=%d,height=%d "+
"! queue "+
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"! vp8enc end-usage=cbr target-bitrate=%d cpu-used=16 threads=4 deadline=100000 undershoot=95 error-resilient=partitions keyframe-max-dist=15 auto-alt-ref=true min-quantizer=12 max-quantizer=24 "+
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"! appsink name=appsink", config.Display, width, height, bitrate,
)
}),
},
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videoIDs: []string{"hd", "hq", "mq", "lq"},
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}
}
func (manager *CaptureManagerCtx) Start() {
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if manager.broadcast.Started() {
if err := manager.broadcast.createPipeline(); err != nil {
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manager.logger.Panic().Err(err).Msg("unable to create broadcast pipeline")
}
}
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manager.desktop.OnBeforeScreenSizeChange(func() {
for _, video := range manager.videos {
if video.Started() {
video.destroyPipeline()
}
}
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if manager.broadcast.Started() {
manager.broadcast.destroyPipeline()
}
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if manager.screencast.Started() {
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manager.screencast.destroyPipeline()
}
})
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manager.desktop.OnAfterScreenSizeChange(func() {
for _, video := range manager.videos {
if video.Started() {
if err := video.createPipeline(); err != nil {
manager.logger.Panic().Err(err).Msg("unable to recreate video pipeline")
}
}
}
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if manager.broadcast.Started() {
if err := manager.broadcast.createPipeline(); err != nil {
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manager.logger.Panic().Err(err).Msg("unable to recreate broadcast pipeline")
}
}
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if manager.screencast.Started() {
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if err := manager.screencast.createPipeline(); err != nil {
manager.logger.Panic().Err(err).Msg("unable to recreate screencast pipeline")
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}
}
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})
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}
func (manager *CaptureManagerCtx) Shutdown() error {
manager.logger.Info().Msgf("capture shutting down")
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manager.broadcast.shutdown()
manager.screencast.shutdown()
manager.audio.shutdown()
for _, video := range manager.videos {
video.shutdown()
}
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return nil
}
func (manager *CaptureManagerCtx) Broadcast() types.BroadcastManager {
return manager.broadcast
}
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func (manager *CaptureManagerCtx) Screencast() types.ScreencastManager {
return manager.screencast
}
func (manager *CaptureManagerCtx) Audio() types.StreamManager {
return manager.audio
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}
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func (manager *CaptureManagerCtx) Video(videoID string) (types.StreamManager, bool) {
video, ok := manager.videos[videoID]
return video, ok
}
func (manager *CaptureManagerCtx) VideoIDs() []string {
return manager.videoIDs
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}