forked from deepch/vdk
-
Notifications
You must be signed in to change notification settings - Fork 0
/
muxer.go
214 lines (183 loc) · 4.89 KB
/
muxer.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
package ts
import (
"fmt"
"io"
"time"
"github.com/border/vdk/av"
"github.com/border/vdk/codec/aacparser"
"github.com/border/vdk/codec/h264parser"
"github.com/border/vdk/format/ts/tsio"
)
var CodecTypes = []av.CodecType{av.H264, av.AAC}
type Muxer struct {
w io.Writer
streams map[int]*Stream
PaddingToMakeCounterCont bool
psidata []byte
peshdr []byte
tshdr []byte
adtshdr []byte
datav [][]byte
nalus [][]byte
tswpat, tswpmt *tsio.TSWriter
}
func NewMuxer(w io.Writer) *Muxer {
return &Muxer{
w: w,
psidata: make([]byte, 188),
peshdr: make([]byte, tsio.MaxPESHeaderLength),
tshdr: make([]byte, tsio.MaxTSHeaderLength),
adtshdr: make([]byte, aacparser.ADTSHeaderLength),
nalus: make([][]byte, 16),
datav: make([][]byte, 16),
tswpmt: tsio.NewTSWriter(tsio.PMT_PID),
tswpat: tsio.NewTSWriter(tsio.PAT_PID),
}
}
func (self *Muxer) newStream(idx int, codec av.CodecData) (err error) {
ok := false
for _, c := range CodecTypes {
if codec.Type() == c {
ok = true
break
}
}
if !ok {
err = fmt.Errorf("ts: codec type=%s is not supported", codec.Type())
return
}
pid := uint16(idx + 0x100)
stream := &Stream{
muxer: self,
CodecData: codec,
pid: pid,
tsw: tsio.NewTSWriter(pid),
}
self.streams[idx] = stream
return
}
func (self *Muxer) writePaddingTSPackets(tsw *tsio.TSWriter) (err error) {
for tsw.ContinuityCounter&0xf != 0x0 {
if err = tsw.WritePackets(self.w, self.datav[:1], 0, false, true); err != nil {
return
}
}
return
}
func (self *Muxer) WriteTrailer() (err error) {
if self.PaddingToMakeCounterCont {
for _, stream := range self.streams {
if err = self.writePaddingTSPackets(stream.tsw); err != nil {
return
}
}
}
return
}
func (self *Muxer) SetWriter(w io.Writer) {
self.w = w
return
}
func (self *Muxer) WritePATPMT() (err error) {
pat := tsio.PAT{
Entries: []tsio.PATEntry{
{ProgramNumber: 1, ProgramMapPID: tsio.PMT_PID},
},
}
patlen := pat.Marshal(self.psidata[tsio.PSIHeaderLength:])
n := tsio.FillPSI(self.psidata, tsio.TableIdPAT, tsio.TableExtPAT, patlen)
self.datav[0] = self.psidata[:n]
if err = self.tswpat.WritePackets(self.w, self.datav[:1], 0, false, true); err != nil {
return
}
var elemStreams []tsio.ElementaryStreamInfo
for _, stream := range self.streams {
switch stream.Type() {
case av.AAC:
elemStreams = append(elemStreams, tsio.ElementaryStreamInfo{
StreamType: tsio.ElementaryStreamTypeAdtsAAC,
ElementaryPID: stream.pid,
})
case av.H264:
elemStreams = append(elemStreams, tsio.ElementaryStreamInfo{
StreamType: tsio.ElementaryStreamTypeH264,
ElementaryPID: stream.pid,
})
}
}
pmt := tsio.PMT{
PCRPID: 0x100,
ElementaryStreamInfos: elemStreams,
}
pmtlen := pmt.Len()
if pmtlen+tsio.PSIHeaderLength > len(self.psidata) {
err = fmt.Errorf("ts: pmt too large")
return
}
pmt.Marshal(self.psidata[tsio.PSIHeaderLength:])
n = tsio.FillPSI(self.psidata, tsio.TableIdPMT, tsio.TableExtPMT, pmtlen)
self.datav[0] = self.psidata[:n]
if err = self.tswpmt.WritePackets(self.w, self.datav[:1], 0, false, true); err != nil {
return
}
return
}
func (self *Muxer) WriteHeader(streams []av.CodecData) (err error) {
self.streams = map[int]*Stream{}
for idx, stream := range streams {
if err = self.newStream(idx, stream); err != nil {
fmt.Println(err)
}
}
if err = self.WritePATPMT(); err != nil {
return
}
return
}
func (self *Muxer) WritePacket(pkt av.Packet) (err error) {
var stream *Stream = nil
stream, ok := self.streams[int(pkt.Idx)]
if !ok {
fmt.Printf("Warning, unsupported stream index: %d\n", pkt.Idx)
return
}
pkt.Time += time.Second
switch stream.Type() {
case av.AAC:
codec := stream.CodecData.(aacparser.CodecData)
n := tsio.FillPESHeader(self.peshdr, tsio.StreamIdAAC, len(self.adtshdr)+len(pkt.Data), pkt.Time, 0)
self.datav[0] = self.peshdr[:n]
aacparser.FillADTSHeader(self.adtshdr, codec.Config, 1024, len(pkt.Data))
self.datav[1] = self.adtshdr
self.datav[2] = pkt.Data
if err = stream.tsw.WritePackets(self.w, self.datav[:3], pkt.Time, true, false); err != nil {
return
}
case av.H264:
codec := stream.CodecData.(h264parser.CodecData)
nalus := self.nalus[:0]
if pkt.IsKeyFrame {
nalus = append(nalus, codec.SPS())
nalus = append(nalus, codec.PPS())
}
pktnalus, _ := h264parser.SplitNALUs(pkt.Data)
for _, nalu := range pktnalus {
nalus = append(nalus, nalu)
}
datav := self.datav[:1]
for i, nalu := range nalus {
if i == 0 {
datav = append(datav, h264parser.AUDBytes)
} else {
datav = append(datav, h264parser.StartCodeBytes)
}
datav = append(datav, nalu)
}
n := tsio.FillPESHeader(self.peshdr, tsio.StreamIdH264, -1, pkt.Time+pkt.CompositionTime, pkt.Time)
datav[0] = self.peshdr[:n]
if err = stream.tsw.WritePackets(self.w, datav, pkt.Time, pkt.IsKeyFrame, false); err != nil {
return
}
}
return
}