2021-04-27 17:29:43 +00:00
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package converterhls
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2021-04-11 17:05:08 +00:00
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import (
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"bytes"
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"fmt"
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2021-04-27 17:04:05 +00:00
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"io"
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2021-04-11 17:05:08 +00:00
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"net"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/aler9/gortsplib"
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"github.com/aler9/gortsplib/pkg/headers"
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"github.com/aler9/gortsplib/pkg/ringbuffer"
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"github.com/aler9/gortsplib/pkg/rtpaac"
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"github.com/aler9/gortsplib/pkg/rtph264"
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"github.com/aler9/rtsp-simple-server/internal/h264"
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"github.com/aler9/rtsp-simple-server/internal/logger"
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2021-04-27 17:19:47 +00:00
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"github.com/aler9/rtsp-simple-server/internal/readpublisher"
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2021-04-11 17:05:08 +00:00
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"github.com/aler9/rtsp-simple-server/internal/stats"
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)
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const (
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// an offset is needed to
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// - avoid negative PTS values
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// - avoid PTS < DTS during startup
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ptsOffset = 2 * time.Second
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segmentMinAUCount = 100
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closeCheckPeriod = 1 * time.Second
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closeAfterInactivity = 60 * time.Second
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)
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const index = `<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<style>
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#video {
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width: 600px;
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height: 600px;
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background: black;
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}
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</style>
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</head>
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<body>
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<script src="https://cdn.jsdelivr.net/npm/hls.js@1.0.0"></script>
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<video id="video" muted controls></video>
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<script>
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const create = () => {
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const video = document.getElementById('video');
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const hls = new Hls({
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progressive: false,
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});
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hls.on(Hls.Events.ERROR, (evt, data) => {
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if (data.fatal) {
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hls.destroy();
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setTimeout(() => {
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create();
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}, 2000);
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}
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});
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hls.loadSource('stream.m3u8');
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hls.attachMedia(video);
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video.play();
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}
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create();
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</script>
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</body>
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</html>
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`
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func ipEqualOrInRange(ip net.IP, ips []interface{}) bool {
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for _, item := range ips {
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switch titem := item.(type) {
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case net.IP:
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if titem.Equal(ip) {
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return true
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}
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case *net.IPNet:
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if titem.Contains(ip) {
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return true
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}
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}
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}
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return false
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}
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2021-04-27 17:04:05 +00:00
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// Request is an HTTP request received by an HLS server.
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type Request struct {
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Path string
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Subpath string
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Req *http.Request
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W http.ResponseWriter
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Res chan io.Reader
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}
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2021-04-11 17:05:08 +00:00
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type trackIDPayloadPair struct {
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trackID int
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buf []byte
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}
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// PathMan is implemented by pathman.PathMan.
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type PathMan interface {
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2021-04-27 17:19:47 +00:00
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OnReadPublisherSetupPlay(readpublisher.SetupPlayReq)
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}
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2021-04-27 17:19:47 +00:00
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// Parent is implemented by serverhls.Server.
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2021-04-11 17:05:08 +00:00
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type Parent interface {
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Log(logger.Level, string, ...interface{})
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2021-04-27 17:29:43 +00:00
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OnConverterClose(*Converter)
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2021-04-11 17:05:08 +00:00
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}
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2021-04-27 17:29:43 +00:00
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// Converter is an HLS converter.
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type Converter struct {
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hlsSegmentCount int
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hlsSegmentDuration time.Duration
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readBufferCount int
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wg *sync.WaitGroup
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stats *stats.Stats
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pathName string
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pathMan PathMan
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parent Parent
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2021-04-27 17:19:47 +00:00
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path readpublisher.Path
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2021-04-11 17:05:08 +00:00
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ringBuffer *ringbuffer.RingBuffer
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tsQueue []*tsFile
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tsByName map[string]*tsFile
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tsDeleteCount int
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tsMutex sync.Mutex
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lastRequestTime int64
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// in
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2021-04-27 17:04:05 +00:00
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request chan Request
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terminate chan struct{}
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}
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2021-04-27 17:29:43 +00:00
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// New allocates a Converter.
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2021-04-11 17:05:08 +00:00
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func New(
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hlsSegmentCount int,
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hlsSegmentDuration time.Duration,
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readBufferCount int,
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wg *sync.WaitGroup,
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stats *stats.Stats,
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pathName string,
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pathMan PathMan,
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2021-04-27 17:29:43 +00:00
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parent Parent) *Converter {
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2021-04-11 17:05:08 +00:00
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c := &Converter{
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2021-04-11 17:05:08 +00:00
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hlsSegmentCount: hlsSegmentCount,
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hlsSegmentDuration: hlsSegmentDuration,
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readBufferCount: readBufferCount,
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wg: wg,
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stats: stats,
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pathName: pathName,
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pathMan: pathMan,
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parent: parent,
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lastRequestTime: time.Now().Unix(),
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tsByName: make(map[string]*tsFile),
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2021-04-27 17:04:05 +00:00
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request: make(chan Request),
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2021-04-11 17:05:08 +00:00
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terminate: make(chan struct{}),
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}
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2021-04-27 17:29:43 +00:00
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c.log(logger.Info, "created")
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2021-04-11 17:05:08 +00:00
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c.wg.Add(1)
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go c.run()
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return c
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}
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2021-04-27 17:29:43 +00:00
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// Close closes a Converter.
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func (c *Converter) Close() {
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c.log(logger.Info, "destroyed")
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2021-04-11 17:05:08 +00:00
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close(c.terminate)
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}
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2021-04-27 17:29:43 +00:00
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// CloseRequest closes a Converter.
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func (c *Converter) CloseRequest() {
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c.parent.OnConverterClose(c)
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2021-04-27 11:43:15 +00:00
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}
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2021-04-27 17:19:47 +00:00
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// IsReadPublisher implements readpublisher.ReadPublisher.
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2021-04-27 17:29:43 +00:00
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func (c *Converter) IsReadPublisher() {}
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2021-04-11 17:05:08 +00:00
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2021-04-27 17:29:43 +00:00
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// IsSource implements source.Source.
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func (c *Converter) IsSource() {}
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2021-04-11 17:05:08 +00:00
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2021-04-27 17:29:43 +00:00
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func (c *Converter) log(level logger.Level, format string, args ...interface{}) {
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c.parent.Log(level, "[converter %s] "+format, append([]interface{}{c.pathName}, args...)...)
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2021-04-11 17:05:08 +00:00
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}
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2021-04-27 17:19:47 +00:00
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// PathName returns the path name of the readpublisher.
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2021-04-27 17:29:43 +00:00
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func (c *Converter) PathName() string {
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2021-04-11 17:05:08 +00:00
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return c.pathName
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}
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2021-04-27 17:29:43 +00:00
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func (c *Converter) run() {
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defer c.wg.Done()
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var videoTrack *gortsplib.Track
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var h264SPS []byte
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var h264PPS []byte
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var h264Decoder *rtph264.Decoder
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var audioTrack *gortsplib.Track
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var aacConfig rtpaac.MPEG4AudioConfig
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var aacDecoder *rtpaac.Decoder
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err := func() error {
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2021-04-27 17:19:47 +00:00
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pres := make(chan readpublisher.SetupPlayRes)
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c.pathMan.OnReadPublisherSetupPlay(readpublisher.SetupPlayReq{c, c.pathName, nil, pres}) //nolint:govet
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2021-04-11 17:05:08 +00:00
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res := <-pres
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if res.Err != nil {
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return res.Err
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}
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c.path = res.Path
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for i, t := range res.Tracks {
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if t.IsH264() {
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if videoTrack != nil {
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return fmt.Errorf("can't read track %d with HLS: too many tracks", i+1)
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}
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videoTrack = t
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var err error
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h264SPS, h264PPS, err = t.ExtractDataH264()
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if err != nil {
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return err
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}
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h264Decoder = rtph264.NewDecoder()
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} else if t.IsAAC() {
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if audioTrack != nil {
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return fmt.Errorf("can't read track %d with HLS: too many tracks", i+1)
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}
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audioTrack = t
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byts, err := t.ExtractDataAAC()
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if err != nil {
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return err
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}
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err = aacConfig.Decode(byts)
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if err != nil {
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return err
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}
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aacDecoder = rtpaac.NewDecoder(aacConfig.SampleRate)
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}
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}
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if videoTrack == nil && audioTrack == nil {
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return fmt.Errorf("unable to find a video or audio track")
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}
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return nil
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}()
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if err != nil {
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c.log(logger.Info, "ERR: %s", err)
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go func() {
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for req := range c.request {
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req.W.WriteHeader(http.StatusNotFound)
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req.Res <- nil
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}
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}()
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if c.path != nil {
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res := make(chan struct{})
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2021-04-27 17:19:47 +00:00
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c.path.OnReadPublisherRemove(readpublisher.RemoveReq{c, res}) //nolint:govet
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2021-04-11 17:05:08 +00:00
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<-res
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}
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2021-04-27 17:29:43 +00:00
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c.parent.OnConverterClose(c)
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2021-04-11 17:05:08 +00:00
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<-c.terminate
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close(c.request)
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return
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}
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curTSFile := newTSFile(videoTrack, audioTrack)
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c.tsByName[curTSFile.Name()] = curTSFile
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c.tsQueue = append(c.tsQueue, curTSFile)
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defer func() {
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curTSFile.Close()
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}()
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requestDone := make(chan struct{})
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go c.runRequestHandler(requestDone)
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defer func() {
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close(c.request)
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<-requestDone
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}()
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c.ringBuffer = ringbuffer.New(uint64(c.readBufferCount))
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2021-04-27 17:19:47 +00:00
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resc := make(chan readpublisher.PlayRes)
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c.path.OnReadPublisherPlay(readpublisher.PlayReq{c, resc}) //nolint:govet
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2021-04-11 17:05:08 +00:00
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<-resc
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2021-04-27 17:29:43 +00:00
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c.log(logger.Info, "is reading")
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2021-04-11 17:05:08 +00:00
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writerDone := make(chan error)
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go func() {
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writerDone <- func() error {
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startPCR := time.Now()
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var videoBuf [][]byte
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videoDTSEst := h264.NewDTSEstimator()
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audioAUCount := 0
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for {
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data, ok := c.ringBuffer.Pull()
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if !ok {
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return fmt.Errorf("terminated")
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}
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pair := data.(trackIDPayloadPair)
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if videoTrack != nil && pair.trackID == videoTrack.ID {
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nalus, pts, err := h264Decoder.Decode(pair.buf)
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if err != nil {
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if err != rtph264.ErrMorePacketsNeeded {
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c.log(logger.Warn, "unable to decode video track: %v", err)
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}
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continue
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}
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for _, nalu := range nalus {
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// remove SPS, PPS, AUD
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typ := h264.NALUType(nalu[0] & 0x1F)
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switch typ {
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case h264.NALUTypeSPS, h264.NALUTypePPS, h264.NALUTypeAccessUnitDelimiter:
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continue
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}
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// add SPS and PPS before IDR
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if typ == h264.NALUTypeIDR {
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videoBuf = append(videoBuf, h264SPS)
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videoBuf = append(videoBuf, h264PPS)
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}
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videoBuf = append(videoBuf, nalu)
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}
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// RTP marker means that all the NALUs with the same PTS have been received.
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// send them together.
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marker := (pair.buf[1] >> 7 & 0x1) > 0
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if marker {
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isIDR := func() bool {
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for _, nalu := range videoBuf {
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typ := h264.NALUType(nalu[0] & 0x1F)
|
|
|
|
if typ == h264.NALUTypeIDR {
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}()
|
|
|
|
|
|
|
|
if isIDR {
|
|
|
|
if curTSFile.firstPacketWritten &&
|
|
|
|
time.Since(curTSFile.firstPacketWrittenTime) >= c.hlsSegmentDuration {
|
|
|
|
if curTSFile != nil {
|
|
|
|
curTSFile.Close()
|
|
|
|
}
|
|
|
|
|
|
|
|
curTSFile = newTSFile(videoTrack, audioTrack)
|
|
|
|
c.tsMutex.Lock()
|
|
|
|
c.tsByName[curTSFile.Name()] = curTSFile
|
|
|
|
c.tsQueue = append(c.tsQueue, curTSFile)
|
|
|
|
if len(c.tsQueue) > c.hlsSegmentCount {
|
|
|
|
delete(c.tsByName, c.tsQueue[0].Name())
|
|
|
|
c.tsQueue = c.tsQueue[1:]
|
|
|
|
c.tsDeleteCount++
|
|
|
|
}
|
|
|
|
c.tsMutex.Unlock()
|
|
|
|
}
|
|
|
|
|
|
|
|
} else {
|
|
|
|
if !curTSFile.firstPacketWritten {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
curTSFile.SetPCR(time.Since(startPCR))
|
|
|
|
err := curTSFile.WriteH264(
|
|
|
|
videoDTSEst.Feed(pts+ptsOffset),
|
|
|
|
pts+ptsOffset,
|
|
|
|
isIDR,
|
|
|
|
videoBuf)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
videoBuf = nil
|
|
|
|
}
|
|
|
|
|
|
|
|
} else if audioTrack != nil && pair.trackID == audioTrack.ID {
|
|
|
|
aus, pts, err := aacDecoder.Decode(pair.buf)
|
|
|
|
if err != nil {
|
|
|
|
if err != rtpaac.ErrMorePacketsNeeded {
|
|
|
|
c.log(logger.Warn, "unable to decode audio track: %v", err)
|
|
|
|
}
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
|
|
|
if videoTrack == nil {
|
|
|
|
if curTSFile.firstPacketWritten &&
|
|
|
|
(time.Since(curTSFile.firstPacketWrittenTime) >= c.hlsSegmentDuration &&
|
|
|
|
audioAUCount >= segmentMinAUCount) {
|
|
|
|
|
|
|
|
if curTSFile != nil {
|
|
|
|
curTSFile.Close()
|
|
|
|
}
|
|
|
|
|
|
|
|
audioAUCount = 0
|
|
|
|
curTSFile = newTSFile(videoTrack, audioTrack)
|
|
|
|
c.tsMutex.Lock()
|
|
|
|
c.tsByName[curTSFile.Name()] = curTSFile
|
|
|
|
c.tsQueue = append(c.tsQueue, curTSFile)
|
|
|
|
if len(c.tsQueue) > c.hlsSegmentCount {
|
|
|
|
delete(c.tsByName, c.tsQueue[0].Name())
|
|
|
|
c.tsQueue = c.tsQueue[1:]
|
|
|
|
c.tsDeleteCount++
|
|
|
|
}
|
|
|
|
c.tsMutex.Unlock()
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if !curTSFile.firstPacketWritten {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for i, au := range aus {
|
|
|
|
auPTS := pts + time.Duration(i)*1000*time.Second/time.Duration(aacConfig.SampleRate)
|
|
|
|
|
|
|
|
audioAUCount++
|
|
|
|
curTSFile.SetPCR(time.Since(startPCR))
|
|
|
|
err := curTSFile.WriteAAC(
|
|
|
|
aacConfig.SampleRate,
|
|
|
|
aacConfig.ChannelCount,
|
|
|
|
auPTS+ptsOffset,
|
|
|
|
au)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
}()
|
|
|
|
|
|
|
|
closeCheckTicker := time.NewTicker(closeCheckPeriod)
|
|
|
|
defer closeCheckTicker.Stop()
|
|
|
|
|
|
|
|
for {
|
|
|
|
select {
|
|
|
|
case <-closeCheckTicker.C:
|
|
|
|
t := time.Unix(atomic.LoadInt64(&c.lastRequestTime), 0)
|
|
|
|
if time.Since(t) >= closeAfterInactivity {
|
2021-04-27 17:31:34 +00:00
|
|
|
c.log(logger.Info, "destroying due to inactivity")
|
2021-04-11 17:05:08 +00:00
|
|
|
|
|
|
|
c.ringBuffer.Close()
|
|
|
|
<-writerDone
|
|
|
|
|
|
|
|
res := make(chan struct{})
|
2021-04-27 17:19:47 +00:00
|
|
|
c.path.OnReadPublisherRemove(readpublisher.RemoveReq{c, res}) //nolint:govet
|
2021-04-11 17:05:08 +00:00
|
|
|
<-res
|
|
|
|
|
2021-04-27 17:29:43 +00:00
|
|
|
c.parent.OnConverterClose(c)
|
2021-04-11 17:05:08 +00:00
|
|
|
<-c.terminate
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
case err := <-writerDone:
|
|
|
|
c.log(logger.Info, "ERR: %s", err)
|
|
|
|
|
|
|
|
res := make(chan struct{})
|
2021-04-27 17:19:47 +00:00
|
|
|
c.path.OnReadPublisherRemove(readpublisher.RemoveReq{c, res}) //nolint:govet
|
2021-04-11 17:05:08 +00:00
|
|
|
<-res
|
|
|
|
|
2021-04-27 17:29:43 +00:00
|
|
|
c.parent.OnConverterClose(c)
|
2021-04-11 17:05:08 +00:00
|
|
|
<-c.terminate
|
|
|
|
return
|
|
|
|
|
|
|
|
case <-c.terminate:
|
|
|
|
res := make(chan struct{})
|
2021-04-27 17:19:47 +00:00
|
|
|
c.path.OnReadPublisherRemove(readpublisher.RemoveReq{c, res}) //nolint:govet
|
2021-04-11 17:05:08 +00:00
|
|
|
<-res
|
|
|
|
|
|
|
|
c.ringBuffer.Close()
|
|
|
|
<-writerDone
|
|
|
|
return
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-04-27 17:29:43 +00:00
|
|
|
func (c *Converter) runRequestHandler(done chan struct{}) {
|
2021-04-11 17:05:08 +00:00
|
|
|
defer close(done)
|
|
|
|
|
|
|
|
for preq := range c.request {
|
|
|
|
req := preq
|
|
|
|
|
|
|
|
atomic.StoreInt64(&c.lastRequestTime, time.Now().Unix())
|
|
|
|
|
|
|
|
conf := c.path.Conf()
|
|
|
|
|
|
|
|
if conf.ReadIpsParsed != nil {
|
|
|
|
tmp, _, _ := net.SplitHostPort(req.Req.RemoteAddr)
|
|
|
|
ip := net.ParseIP(tmp)
|
|
|
|
if !ipEqualOrInRange(ip, conf.ReadIpsParsed) {
|
|
|
|
c.log(logger.Info, "ERR: ip '%s' not allowed", ip)
|
|
|
|
req.W.WriteHeader(http.StatusUnauthorized)
|
|
|
|
req.Res <- nil
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if conf.ReadUser != "" {
|
|
|
|
user, pass, ok := req.Req.BasicAuth()
|
|
|
|
if !ok || user != conf.ReadUser || pass != conf.ReadPass {
|
|
|
|
req.W.Header().Set("WWW-Authenticate", `Basic realm="rtsp-simple-server"`)
|
|
|
|
req.W.WriteHeader(http.StatusUnauthorized)
|
|
|
|
req.Res <- nil
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
switch {
|
|
|
|
case req.Subpath == "stream.m3u8":
|
|
|
|
func() {
|
|
|
|
c.tsMutex.Lock()
|
|
|
|
defer c.tsMutex.Unlock()
|
|
|
|
|
|
|
|
if len(c.tsQueue) == 0 {
|
|
|
|
req.W.WriteHeader(http.StatusNotFound)
|
|
|
|
req.Res <- nil
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
cnt := "#EXTM3U\n"
|
|
|
|
cnt += "#EXT-X-VERSION:3\n"
|
|
|
|
cnt += "#EXT-X-ALLOW-CACHE:NO\n"
|
|
|
|
cnt += "#EXT-X-TARGETDURATION:10\n"
|
|
|
|
cnt += "#EXT-X-MEDIA-SEQUENCE:" + strconv.FormatInt(int64(c.tsDeleteCount), 10) + "\n"
|
|
|
|
for _, f := range c.tsQueue {
|
|
|
|
cnt += "#EXTINF:10,\n"
|
|
|
|
cnt += f.Name() + ".ts\n"
|
|
|
|
}
|
|
|
|
req.Res <- bytes.NewReader([]byte(cnt))
|
|
|
|
}()
|
|
|
|
|
|
|
|
case strings.HasSuffix(req.Subpath, ".ts"):
|
|
|
|
base := strings.TrimSuffix(req.Subpath, ".ts")
|
|
|
|
|
|
|
|
c.tsMutex.Lock()
|
|
|
|
f, ok := c.tsByName[base]
|
|
|
|
c.tsMutex.Unlock()
|
|
|
|
|
|
|
|
if !ok {
|
|
|
|
req.W.WriteHeader(http.StatusNotFound)
|
|
|
|
req.Res <- nil
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
|
|
|
req.Res <- f.buf.NewReader()
|
|
|
|
|
|
|
|
case req.Subpath == "":
|
|
|
|
req.Res <- bytes.NewReader([]byte(index))
|
|
|
|
|
|
|
|
default:
|
|
|
|
req.W.WriteHeader(http.StatusNotFound)
|
|
|
|
req.Res <- nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-04-27 17:29:43 +00:00
|
|
|
// OnRequest is called by serverhls.Server.
|
|
|
|
func (c *Converter) OnRequest(req Request) {
|
2021-04-11 17:05:08 +00:00
|
|
|
c.request <- req
|
|
|
|
}
|
|
|
|
|
|
|
|
// Authenticate performs an authentication.
|
2021-04-27 17:29:43 +00:00
|
|
|
func (c *Converter) Authenticate(authMethods []headers.AuthMethod,
|
2021-04-11 17:05:08 +00:00
|
|
|
pathName string, ips []interface{},
|
|
|
|
user string, pass string, req interface{}) error {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// OnFrame implements path.Reader.
|
2021-04-27 17:29:43 +00:00
|
|
|
func (c *Converter) OnFrame(trackID int, streamType gortsplib.StreamType, payload []byte) {
|
2021-04-11 17:05:08 +00:00
|
|
|
if streamType == gortsplib.StreamTypeRTP {
|
|
|
|
c.ringBuffer.Push(trackIDPayloadPair{trackID, payload})
|
|
|
|
}
|
|
|
|
}
|