/
source.go
279 lines (252 loc) · 6.35 KB
/
source.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
package hls
import (
"bytes"
"fmt"
"github.com/NOMADxzy/livego/configure"
"time"
"github.com/NOMADxzy/livego/av"
"github.com/NOMADxzy/livego/container/flv"
"github.com/NOMADxzy/livego/container/ts"
"github.com/NOMADxzy/livego/parser"
log "github.com/sirupsen/logrus"
)
const (
videoHZ = 90000
aacSampleLen = 1024
maxQueueNum = 512
h264_default_hz uint64 = 90
)
type Source struct {
av.RWBaser
seq int
info av.Info
bwriter *bytes.Buffer
btswriter *bytes.Buffer
demuxer *flv.Demuxer
muxer *ts.Muxer
pts, dts uint64
stat *status
align *align
cache *audioCache
tsCache *TSCacheItem
tsparser *parser.CodecParser
closed bool
packetQueue chan *av.Packet
}
func NewSource(info av.Info) *Source {
info.Inter = true
s := &Source{
info: info,
align: &align{},
stat: newStatus(),
RWBaser: av.NewRWBaser(time.Second * 10),
cache: newAudioCache(),
demuxer: flv.NewDemuxer(),
muxer: ts.NewMuxer(),
tsCache: NewTSCacheItem(info.Key),
tsparser: parser.NewCodecParser(),
bwriter: bytes.NewBuffer(make([]byte, 100*1024)),
packetQueue: make(chan *av.Packet, maxQueueNum),
}
go func() {
err := s.SendPacket()
if err != nil {
log.Debug("send packet error: ", err)
s.closed = true
}
}()
return s
}
func (source *Source) GetCacheInc() *TSCacheItem {
return source.tsCache
}
func (source *Source) DropPacket(pktQue chan *av.Packet, info av.Info) {
log.Warningf("[%v] packet queue max!!!", info)
for i := 0; i < maxQueueNum-84; i++ {
tmpPkt, ok := <-pktQue
// try to don't drop audio
if ok && tmpPkt.IsAudio {
if len(pktQue) > maxQueueNum-2 {
<-pktQue
} else {
pktQue <- tmpPkt
}
}
if ok && tmpPkt.IsVideo {
videoPkt, ok := tmpPkt.Header.(av.VideoPacketHeader)
// dont't drop sps config and dont't drop key frame
if ok && (videoPkt.IsSeq() || videoPkt.IsKeyFrame()) {
pktQue <- tmpPkt
}
if len(pktQue) > maxQueueNum-10 {
<-pktQue
}
}
}
log.Debug("packet queue len: ", len(pktQue))
}
func (source *Source) Write(p *av.Packet) (err error) {
err = nil
if source.closed {
err = fmt.Errorf("hls source closed")
return
}
source.SetPreTime()
defer func() {
if e := recover(); e != nil {
err = fmt.Errorf("hls source has already been closed:%v", e)
}
}()
if len(source.packetQueue) >= maxQueueNum-24 {
source.DropPacket(source.packetQueue, source.info)
} else {
if !source.closed {
source.packetQueue <- p
}
}
return
}
func (source *Source) SendPacket() error {
defer func() {
log.Debugf("[%v] hls sender stop", source.info)
if r := recover(); r != nil {
log.Warning("hls SendPacket panic: ", r)
}
}()
log.Debugf("[%v] hls sender start", source.info)
for {
if source.closed {
return fmt.Errorf("closed")
}
p, ok := <-source.packetQueue
if ok {
if p.IsMetadata {
continue
}
err := source.demuxer.Demux(p)
if err == flv.ErrAvcEndSEQ {
log.Warning(err)
continue
} else {
if err != nil {
log.Warning(err)
return err
}
}
compositionTime, isSeq, err := source.parse(p)
if err != nil {
log.Warning(err)
}
if err != nil || isSeq {
continue
}
if source.btswriter != nil {
source.stat.update(p.IsVideo, p.TimeStamp)
source.calcPtsDts(p.IsVideo, p.TimeStamp, uint32(compositionTime))
source.tsMux(p)
}
} else {
return fmt.Errorf("closed")
}
}
}
func (source *Source) Info() (ret av.Info) {
return source.info
}
func (source *Source) cleanup() {
close(source.packetQueue)
source.bwriter = nil
source.btswriter = nil
source.cache = nil
source.tsCache = nil
}
func (source *Source) Close(err error) {
log.Debug("hls source closed: ", source.info)
if !source.closed && !configure.Config.GetBool("hls_keep_after_end") {
source.cleanup()
}
source.closed = true
}
func (source *Source) cut() {
newf := true
if source.btswriter == nil {
source.btswriter = bytes.NewBuffer(nil)
} else if source.btswriter != nil && source.stat.durationMs() >= duration {
source.flushAudio()
source.seq++
filename := fmt.Sprintf("/%s/%d.ts", source.info.Key, time.Now().Unix())
item := NewTSItem(filename, int(source.stat.durationMs()), source.seq, source.btswriter.Bytes())
source.tsCache.SetItem(filename, item)
source.btswriter.Reset()
source.stat.resetAndNew()
} else {
newf = false
}
if newf {
source.btswriter.Write(source.muxer.PAT())
source.btswriter.Write(source.muxer.PMT(av.SOUND_AAC, true))
}
}
func (source *Source) parse(p *av.Packet) (int32, bool, error) {
var compositionTime int32
var ah av.AudioPacketHeader
var vh av.VideoPacketHeader
if p.IsVideo {
vh = p.Header.(av.VideoPacketHeader)
if vh.CodecID() != av.VIDEO_H264 {
return compositionTime, false, ErrNoSupportVideoCodec
}
compositionTime = vh.CompositionTime()
if vh.IsKeyFrame() && vh.IsSeq() {
return compositionTime, true, source.tsparser.Parse(p, source.bwriter)
}
} else {
ah = p.Header.(av.AudioPacketHeader)
if ah.SoundFormat() != av.SOUND_AAC {
return compositionTime, false, ErrNoSupportAudioCodec
}
if ah.AACPacketType() == av.AAC_SEQHDR {
return compositionTime, true, source.tsparser.Parse(p, source.bwriter)
}
}
source.bwriter.Reset()
if err := source.tsparser.Parse(p, source.bwriter); err != nil {
return compositionTime, false, err
}
p.Data = source.bwriter.Bytes()
if p.IsVideo && vh.IsKeyFrame() {
source.cut()
}
return compositionTime, false, nil
}
func (source *Source) calcPtsDts(isVideo bool, ts, compositionTs uint32) {
source.dts = uint64(ts) * h264_default_hz
if isVideo {
source.pts = source.dts + uint64(compositionTs)*h264_default_hz
} else {
sampleRate, _ := source.tsparser.SampleRate()
source.align.align(&source.dts, uint32(videoHZ*aacSampleLen/sampleRate))
source.pts = source.dts
}
}
func (source *Source) flushAudio() error {
return source.muxAudio(1)
}
func (source *Source) muxAudio(limit byte) error {
if source.cache.CacheNum() < limit {
return nil
}
var p av.Packet
_, pts, buf := source.cache.GetFrame()
p.Data = buf
p.TimeStamp = uint32(pts / h264_default_hz)
return source.muxer.Mux(&p, source.btswriter)
}
func (source *Source) tsMux(p *av.Packet) error {
if p.IsVideo {
return source.muxer.Mux(p, source.btswriter)
} else {
source.cache.Cache(p.Data, source.pts)
return source.muxAudio(cache_max_frames)
}
}