neko/internal/capture/manager.go

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package capture
import (
"errors"
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"fmt"
"strings"
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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"
)
type CaptureManagerCtx struct {
logger zerolog.Logger
desktop types.DesktopManager
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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=%d "+
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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=%d key-int-max=15 byte-stream=true tune=zerolatency speed-preset=%s "+
"! mux.", config.AudioDevice, config.BroadcastAudioBitrate*1000, config.Display, config.BroadcastVideoBitrate, config.BroadcastPreset,
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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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videos := map[string]*StreamManagerCtx{}
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for video_id, cnf := range config.VideoPipelines {
pipelineConf := cnf
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createPipeline := func() string {
if pipelineConf.GstPipeline != "" {
return strings.Replace(pipelineConf.GstPipeline, "{display}", config.Display, 1)
}
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screen := desktop.GetScreenSize()
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pipeline, err := pipelineConf.GetPipeline(*screen)
if err != nil {
logger.Panic().Err(err).
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Str("video_id", video_id).
Msg("unable to get video pipeline")
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}
return fmt.Sprintf(
"ximagesrc display-name=%s show-pointer=false use-damage=false "+
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"%s ! appsink name=appsink", config.Display, pipeline,
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)
}
// trigger function to catch evaluation errors at startup
pipeline := createPipeline()
logger.Info().
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Str("video_id", video_id).
Str("pipeline", pipeline).
Msg("syntax check for video stream pipeline passed")
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// append to videos
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videos[video_id] = streamNew(config.VideoCodec, createPipeline, video_id)
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}
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return &CaptureManagerCtx{
logger: logger,
desktop: desktop,
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broadcast: broadcastNew(broadcastPipeline),
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screencast: screencastNew(config.ScreencastEnabled, screencastPipeline),
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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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}, "audio"),
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videos: videos,
videoIDs: config.VideoIDs,
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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() {
err := video.createPipeline()
if err != nil && !errors.Is(err, types.ErrCapturePipelineAlreadyExists) {
manager.logger.Panic().Err(err).Msg("unable to recreate video pipeline")
}
}
}
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if manager.broadcast.Started() {
err := manager.broadcast.createPipeline()
if err != nil && !errors.Is(err, types.ErrCapturePipelineAlreadyExists) {
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manager.logger.Panic().Err(err).Msg("unable to recreate broadcast pipeline")
}
}
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if manager.screencast.Started() {
err := manager.screencast.createPipeline()
if err != nil && !errors.Is(err, types.ErrCapturePipelineAlreadyExists) {
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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 {
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manager.logger.Info().Msgf("shutdown")
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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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}