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support recording G711 tracks with fMP4 (#2853)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| package formatprocessor //nolint:dupl | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/bluenviron/gortsplib/v4/pkg/format" | ||
| "github.com/bluenviron/gortsplib/v4/pkg/format/rtpsimpleaudio" | ||
| "github.com/pion/rtp" | ||
|
|
||
| "github.com/bluenviron/mediamtx/internal/unit" | ||
| ) | ||
|
|
||
| type formatProcessorG711 struct { | ||
| udpMaxPayloadSize int | ||
| format *format.G711 | ||
| encoder *rtpsimpleaudio.Encoder | ||
| decoder *rtpsimpleaudio.Decoder | ||
| } | ||
|
|
||
| func newG711( | ||
| udpMaxPayloadSize int, | ||
| forma *format.G711, | ||
| generateRTPPackets bool, | ||
| ) (*formatProcessorG711, error) { | ||
| t := &formatProcessorG711{ | ||
| udpMaxPayloadSize: udpMaxPayloadSize, | ||
| format: forma, | ||
| } | ||
|
|
||
| if generateRTPPackets { | ||
| err := t.createEncoder() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| return t, nil | ||
| } | ||
|
|
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| func (t *formatProcessorG711) createEncoder() error { | ||
| t.encoder = &rtpsimpleaudio.Encoder{ | ||
| PayloadMaxSize: t.udpMaxPayloadSize - 12, | ||
| } | ||
| return t.encoder.Init() | ||
| } | ||
|
|
||
| func (t *formatProcessorG711) ProcessUnit(uu unit.Unit) error { //nolint:dupl | ||
| u := uu.(*unit.G711) | ||
|
|
||
| pkt, err := t.encoder.Encode(u.Samples) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| ts := uint32(multiplyAndDivide(u.PTS, time.Duration(t.format.ClockRate()), time.Second)) | ||
| pkt.Timestamp += ts | ||
|
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| u.RTPPackets = []*rtp.Packet{pkt} | ||
|
|
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| return nil | ||
| } | ||
|
|
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| func (t *formatProcessorG711) ProcessRTPPacket( //nolint:dupl | ||
| pkt *rtp.Packet, | ||
| ntp time.Time, | ||
| pts time.Duration, | ||
| hasNonRTSPReaders bool, | ||
| ) (Unit, error) { | ||
| u := &unit.G711{ | ||
| Base: unit.Base{ | ||
| RTPPackets: []*rtp.Packet{pkt}, | ||
| NTP: ntp, | ||
| PTS: pts, | ||
| }, | ||
| } | ||
|
|
||
| // remove padding | ||
| pkt.Header.Padding = false | ||
| pkt.PaddingSize = 0 | ||
|
|
||
| if pkt.MarshalSize() > t.udpMaxPayloadSize { | ||
| return nil, fmt.Errorf("payload size (%d) is greater than maximum allowed (%d)", | ||
| pkt.MarshalSize(), t.udpMaxPayloadSize) | ||
| } | ||
|
|
||
| // decode from RTP | ||
| if hasNonRTSPReaders || t.decoder != nil { | ||
| if t.decoder == nil { | ||
| var err error | ||
| t.decoder, err = t.format.CreateDecoder() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| samples, err := t.decoder.Decode(pkt) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| u.Samples = samples | ||
| } | ||
|
|
||
| // route packet as is | ||
| return u, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| package unit | ||
|
|
||
| // G711 is a G711 data unit. | ||
| type G711 struct { | ||
| Base | ||
| Samples []byte | ||
| } |