mirror of
https://github.com/langhuihui/monibuca.git
synced 2025-12-24 13:48:04 +08:00
412 lines
11 KiB
Go
412 lines
11 KiB
Go
package rtp
|
||
|
||
import (
|
||
"encoding/base64"
|
||
"encoding/binary"
|
||
"encoding/hex"
|
||
"fmt"
|
||
"github.com/bluenviron/mediacommon/pkg/bits"
|
||
"github.com/deepch/vdk/codec/aacparser"
|
||
"io"
|
||
"regexp"
|
||
"strings"
|
||
"time"
|
||
"unsafe"
|
||
|
||
"github.com/pion/rtp"
|
||
"github.com/pion/webrtc/v4"
|
||
. "m7s.live/m7s/v5/pkg"
|
||
"m7s.live/m7s/v5/pkg/codec"
|
||
"m7s.live/m7s/v5/pkg/util"
|
||
)
|
||
|
||
var configRegexp = regexp.MustCompile(`config=(.+),([^;]+)(;|$)`)
|
||
|
||
type RTPData struct {
|
||
*webrtc.RTPCodecParameters
|
||
Packets []*rtp.Packet
|
||
util.RecyclableMemory
|
||
}
|
||
|
||
func (r *RTPData) Dump(t byte, w io.Writer) {
|
||
m := r.GetAllocator().Borrow(3 + len(r.Packets)*2 + r.GetSize())
|
||
m[0] = t
|
||
binary.BigEndian.PutUint16(m[1:], uint16(len(r.Packets)))
|
||
offset := 3
|
||
for _, p := range r.Packets {
|
||
size := p.MarshalSize()
|
||
binary.BigEndian.PutUint16(m[offset:], uint16(size))
|
||
offset += 2
|
||
p.MarshalTo(m[offset:])
|
||
offset += size
|
||
}
|
||
w.Write(m)
|
||
}
|
||
|
||
func (r *RTPData) String() (s string) {
|
||
for _, p := range r.Packets {
|
||
s += fmt.Sprintf("t: %d, s: %d, p: %02X %d\n", p.Timestamp, p.SequenceNumber, p.Payload[0:2], len(p.Payload))
|
||
}
|
||
return
|
||
}
|
||
|
||
func (r *RTPData) GetTimestamp() time.Duration {
|
||
return time.Duration(r.Packets[0].Timestamp) * time.Second / time.Duration(r.ClockRate)
|
||
}
|
||
|
||
func (r *RTPData) GetCTS() time.Duration {
|
||
return 0
|
||
}
|
||
|
||
func (r *RTPData) GetSize() (s int) {
|
||
for _, p := range r.Packets {
|
||
s += p.MarshalSize()
|
||
}
|
||
return
|
||
}
|
||
|
||
type (
|
||
RTPCtx struct {
|
||
webrtc.RTPCodecParameters
|
||
Fmtp map[string]string
|
||
SequenceNumber uint16
|
||
SSRC uint32
|
||
}
|
||
RTPPCMACtx struct {
|
||
RTPCtx
|
||
codec.PCMACtx
|
||
}
|
||
RTPPCMUCtx struct {
|
||
RTPCtx
|
||
codec.PCMUCtx
|
||
}
|
||
RTPOPUSCtx struct {
|
||
RTPCtx
|
||
codec.OPUSCtx
|
||
}
|
||
RTPAACCtx struct {
|
||
RTPCtx
|
||
codec.AACCtx
|
||
SizeLength int // 通常为13
|
||
IndexLength int
|
||
IndexDeltaLength int
|
||
}
|
||
IRTPCtx interface {
|
||
GetRTPCodecParameter() webrtc.RTPCodecParameters
|
||
}
|
||
)
|
||
|
||
func (r *RTPCtx) parseFmtpLine(cp *webrtc.RTPCodecParameters) {
|
||
r.RTPCodecParameters = *cp
|
||
r.Fmtp = make(map[string]string)
|
||
kvs := strings.Split(r.SDPFmtpLine, ";")
|
||
for _, kv := range kvs {
|
||
if kv = strings.TrimSpace(kv); kv == "" {
|
||
continue
|
||
}
|
||
if key, value, found := strings.Cut(kv, "="); found {
|
||
r.Fmtp[strings.TrimSpace(key)] = strings.TrimSpace(value)
|
||
}
|
||
}
|
||
}
|
||
|
||
func (r *RTPCtx) GetInfo() string {
|
||
return r.GetRTPCodecParameter().SDPFmtpLine
|
||
}
|
||
func (r *RTPAACCtx) GetInfo() string {
|
||
return r.AACCtx.GetInfo()
|
||
}
|
||
func (r *RTPOPUSCtx) GetInfo() string {
|
||
return r.OPUSCtx.GetInfo()
|
||
}
|
||
func (r *RTPCtx) GetRTPCodecParameter() webrtc.RTPCodecParameters {
|
||
return r.RTPCodecParameters
|
||
}
|
||
|
||
func (r *RTPData) Append(ctx *RTPCtx, ts uint32, payload []byte) (lastPacket *rtp.Packet) {
|
||
ctx.SequenceNumber++
|
||
lastPacket = &rtp.Packet{
|
||
Header: rtp.Header{
|
||
Version: 2,
|
||
SequenceNumber: ctx.SequenceNumber,
|
||
Timestamp: ts,
|
||
SSRC: ctx.SSRC,
|
||
PayloadType: uint8(ctx.PayloadType),
|
||
},
|
||
Payload: payload,
|
||
}
|
||
r.Packets = append(r.Packets, lastPacket)
|
||
return
|
||
}
|
||
|
||
func (r *RTPData) ConvertCtx(from codec.ICodecCtx) (to codec.ICodecCtx, seq IAVFrame, err error) {
|
||
switch from.FourCC() {
|
||
case codec.FourCC_H264:
|
||
var ctx RTPH264Ctx
|
||
ctx.H264Ctx = *from.GetBase().(*codec.H264Ctx)
|
||
ctx.PayloadType = 96
|
||
ctx.MimeType = webrtc.MimeTypeH264
|
||
ctx.ClockRate = 90000
|
||
spsInfo := ctx.SPSInfo
|
||
ctx.SDPFmtpLine = fmt.Sprintf("sprop-parameter-sets=%s,%s;profile-level-id=%02x%02x%02x;level-asymmetry-allowed=1;packetization-mode=1", base64.StdEncoding.EncodeToString(ctx.SPS()), base64.StdEncoding.EncodeToString(ctx.PPS()), spsInfo.ProfileIdc, spsInfo.ConstraintSetFlag, spsInfo.LevelIdc)
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
to = &ctx
|
||
case codec.FourCC_H265:
|
||
var ctx RTPH265Ctx
|
||
ctx.H265Ctx = *from.GetBase().(*codec.H265Ctx)
|
||
ctx.PayloadType = 98
|
||
ctx.MimeType = webrtc.MimeTypeH265
|
||
ctx.SDPFmtpLine = fmt.Sprintf("profile-id=1;sprop-sps=%s;sprop-pps=%s;sprop-vps=%s", base64.StdEncoding.EncodeToString(ctx.SPS()), base64.StdEncoding.EncodeToString(ctx.PPS()), base64.StdEncoding.EncodeToString(ctx.VPS()))
|
||
ctx.ClockRate = 90000
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
to = &ctx
|
||
case codec.FourCC_MP4A:
|
||
var ctx RTPAACCtx
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
ctx.AACCtx = *from.GetBase().(*codec.AACCtx)
|
||
ctx.MimeType = "audio/MPEG4-GENERIC"
|
||
ctx.SDPFmtpLine = fmt.Sprintf("profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=%s", hex.EncodeToString(ctx.AACCtx.ConfigBytes))
|
||
ctx.IndexLength = 3
|
||
ctx.IndexDeltaLength = 3
|
||
ctx.SizeLength = 13
|
||
ctx.RTPCtx.Channels = uint16(ctx.AACCtx.GetChannels())
|
||
ctx.PayloadType = 97
|
||
ctx.ClockRate = uint32(ctx.CodecData.SampleRate())
|
||
to = &ctx
|
||
case codec.FourCC_ALAW:
|
||
var ctx RTPPCMACtx
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
ctx.PCMACtx = *from.GetBase().(*codec.PCMACtx)
|
||
ctx.MimeType = webrtc.MimeTypePCMA
|
||
ctx.PayloadType = 8
|
||
ctx.ClockRate = uint32(ctx.SampleRate)
|
||
to = &ctx
|
||
case codec.FourCC_ULAW:
|
||
var ctx RTPPCMUCtx
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
ctx.PCMUCtx = *from.GetBase().(*codec.PCMUCtx)
|
||
ctx.MimeType = webrtc.MimeTypePCMU
|
||
ctx.PayloadType = 0
|
||
ctx.ClockRate = uint32(ctx.SampleRate)
|
||
to = &ctx
|
||
case codec.FourCC_OPUS:
|
||
var ctx RTPOPUSCtx
|
||
ctx.SSRC = uint32(uintptr(unsafe.Pointer(&ctx)))
|
||
ctx.OPUSCtx = *from.GetBase().(*codec.OPUSCtx)
|
||
ctx.MimeType = webrtc.MimeTypeOpus
|
||
ctx.PayloadType = 111
|
||
ctx.ClockRate = uint32(ctx.CodecData.SampleRate())
|
||
to = &ctx
|
||
}
|
||
return
|
||
}
|
||
|
||
type RTPAudio struct {
|
||
RTPData
|
||
}
|
||
|
||
func (r *RTPAudio) Parse(t *AVTrack) (err error) {
|
||
switch r.MimeType {
|
||
case webrtc.MimeTypeOpus:
|
||
var ctx RTPOPUSCtx
|
||
ctx.parseFmtpLine(r.RTPCodecParameters)
|
||
t.ICodecCtx = &ctx
|
||
case webrtc.MimeTypePCMA:
|
||
var ctx RTPPCMACtx
|
||
ctx.parseFmtpLine(r.RTPCodecParameters)
|
||
t.ICodecCtx = &ctx
|
||
case webrtc.MimeTypePCMU:
|
||
var ctx RTPPCMUCtx
|
||
ctx.parseFmtpLine(r.RTPCodecParameters)
|
||
t.ICodecCtx = &ctx
|
||
case "audio/MPEG4-GENERIC":
|
||
var ctx *RTPAACCtx
|
||
if t.ICodecCtx != nil {
|
||
ctx = t.ICodecCtx.(*RTPAACCtx)
|
||
} else {
|
||
ctx = &RTPAACCtx{}
|
||
ctx.parseFmtpLine(r.RTPCodecParameters)
|
||
ctx.IndexLength = 3
|
||
ctx.IndexDeltaLength = 3
|
||
ctx.SizeLength = 13
|
||
if conf, ok := ctx.Fmtp["config"]; ok {
|
||
if ctx.AACCtx.ConfigBytes, err = hex.DecodeString(conf); err == nil {
|
||
if ctx.CodecData, err = aacparser.NewCodecDataFromMPEG4AudioConfigBytes(ctx.AACCtx.ConfigBytes); err != nil {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
t.ICodecCtx = ctx
|
||
}
|
||
}
|
||
return
|
||
}
|
||
|
||
func (r *RTPAudio) Demux(codexCtx codec.ICodecCtx) (any, error) {
|
||
var data AudioData
|
||
switch codexCtx.(type) {
|
||
case *RTPAACCtx:
|
||
var fragments util.Memory
|
||
for _, packet := range r.Packets {
|
||
if len(packet.Payload) < 2 {
|
||
continue
|
||
}
|
||
auHeaderLen := util.ReadBE[int](packet.Payload[:2])
|
||
if auHeaderLen == 0 {
|
||
data.AppendOne(packet.Payload)
|
||
} else {
|
||
dataLens, err := r.readAUHeaders(codexCtx.(*RTPAACCtx), packet.Payload[2:], auHeaderLen)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
payload := packet.Payload[2:]
|
||
pos := auHeaderLen >> 3
|
||
if (auHeaderLen % 8) != 0 {
|
||
pos++
|
||
}
|
||
payload = payload[pos:]
|
||
if fragments.Size == 0 {
|
||
if packet.Marker {
|
||
for _, dataLen := range dataLens {
|
||
if len(payload) < int(dataLen) {
|
||
return nil, fmt.Errorf("invalid data len %d", dataLen)
|
||
}
|
||
data.AppendOne(payload[:dataLen])
|
||
payload = payload[dataLen:]
|
||
}
|
||
} else {
|
||
if len(dataLens) != 1 {
|
||
return nil, fmt.Errorf("a fragmented packet can only contain one AU")
|
||
}
|
||
fragments.AppendOne(payload)
|
||
}
|
||
} else {
|
||
if len(dataLens) != 1 {
|
||
return nil, fmt.Errorf("a fragmented packet can only contain one AU")
|
||
}
|
||
fragments.AppendOne(payload)
|
||
if !packet.Header.Marker {
|
||
continue
|
||
}
|
||
if uint64(fragments.Size) != dataLens[0] {
|
||
return nil, fmt.Errorf("fragmented AU size is not correct %d != %d", dataLens[0], fragments.Size)
|
||
}
|
||
data.Append(fragments.Buffers...)
|
||
fragments = util.Memory{}
|
||
}
|
||
}
|
||
break
|
||
}
|
||
default:
|
||
for _, packet := range r.Packets {
|
||
data.AppendOne(packet.Payload)
|
||
}
|
||
}
|
||
return data, nil
|
||
}
|
||
|
||
func (r *RTPAudio) Mux(codexCtx codec.ICodecCtx, from *AVFrame) {
|
||
data := from.Raw.(AudioData)
|
||
var ctx *RTPCtx
|
||
var lastPacket *rtp.Packet
|
||
switch c := codexCtx.(type) {
|
||
case *RTPAACCtx:
|
||
ctx = &c.RTPCtx
|
||
pts := uint32(from.Timestamp * time.Duration(ctx.ClockRate) / time.Second)
|
||
//AU_HEADER_LENGTH,因为单位是bit, 除以8就是auHeader的字节长度；又因为单个auheader字节长度2字节，所以再除以2就是auheader的个数。
|
||
auHeaderLen := []byte{0x00, 0x10, (byte)((r.Size & 0x1fe0) >> 5), (byte)((r.Size & 0x1f) << 3)} // 3 = 16-13, 5 = 8-3
|
||
for reader := data.NewReader(); reader.Length > 0; {
|
||
payloadLen := MTUSize
|
||
if reader.Length+4 < MTUSize {
|
||
payloadLen = reader.Length + 4
|
||
}
|
||
mem := r.NextN(payloadLen)
|
||
copy(mem, auHeaderLen)
|
||
reader.ReadBytesTo(mem[4:])
|
||
lastPacket = r.Append(ctx, pts, mem)
|
||
}
|
||
lastPacket.Header.Marker = true
|
||
return
|
||
case *RTPPCMACtx:
|
||
ctx = &c.RTPCtx
|
||
case *RTPPCMUCtx:
|
||
ctx = &c.RTPCtx
|
||
}
|
||
pts := uint32(from.Timestamp * time.Duration(ctx.ClockRate) / time.Second)
|
||
if reader := data.NewReader(); reader.Length > MTUSize {
|
||
for reader.Length > 0 {
|
||
payloadLen := MTUSize
|
||
if reader.Length < MTUSize {
|
||
payloadLen = reader.Length
|
||
}
|
||
mem := r.NextN(payloadLen)
|
||
reader.ReadBytesTo(mem)
|
||
lastPacket = r.Append(ctx, pts, mem)
|
||
}
|
||
} else {
|
||
mem := r.NextN(reader.Length)
|
||
reader.ReadBytesTo(mem)
|
||
lastPacket = r.Append(ctx, pts, mem)
|
||
}
|
||
lastPacket.Header.Marker = true
|
||
}
|
||
|
||
func (r *RTPAudio) readAUHeaders(ctx *RTPAACCtx, buf []byte, headersLen int) ([]uint64, error) {
|
||
firstRead := false
|
||
|
||
count := 0
|
||
for i := 0; i < headersLen; {
|
||
if i == 0 {
|
||
i += ctx.SizeLength
|
||
i += ctx.IndexLength
|
||
} else {
|
||
i += ctx.SizeLength
|
||
i += ctx.IndexDeltaLength
|
||
}
|
||
count++
|
||
}
|
||
|
||
dataLens := make([]uint64, count)
|
||
|
||
pos := 0
|
||
i := 0
|
||
|
||
for headersLen > 0 {
|
||
dataLen, err := bits.ReadBits(buf, &pos, ctx.SizeLength)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
headersLen -= ctx.SizeLength
|
||
|
||
if !firstRead {
|
||
firstRead = true
|
||
if ctx.IndexLength > 0 {
|
||
auIndex, err := bits.ReadBits(buf, &pos, ctx.IndexLength)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
headersLen -= ctx.IndexLength
|
||
|
||
if auIndex != 0 {
|
||
return nil, fmt.Errorf("AU-index different than zero is not supported")
|
||
}
|
||
}
|
||
} else if ctx.IndexDeltaLength > 0 {
|
||
auIndexDelta, err := bits.ReadBits(buf, &pos, ctx.IndexDeltaLength)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
headersLen -= ctx.IndexDeltaLength
|
||
|
||
if auIndexDelta != 0 {
|
||
return nil, fmt.Errorf("AU-index-delta different than zero is not supported")
|
||
}
|
||
}
|
||
|
||
dataLens[i] = dataLen
|
||
i++
|
||
}
|
||
|
||
return dataLens, nil
|
||
}
|