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/
rtmp_new_agent.go
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/
rtmp_new_agent.go
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package rtmp
import (
"bytes"
)
type RtmpNewAgent struct {
writeChunkSize int
wchunks map[uint32]*RtmpChunk
streamid uint32
w_buffer *bytes.Buffer
}
func (r *RtmpNewAgent) writeMetadata(data *MediaFrame) error {
chunk := &RtmpChunk{
RTMP_CHANNEL_DATA,
0,
0,
uint32(data.Payload.Len()),
RTMP_MSG_AMF_META,
r.streamid,
false,
bytes.NewBuffer(nil),
}
r.wchunks[chunk.chunkid] = chunk
buf := chunk.body
buf.WriteByte(byte(RTMP_CHUNK_HEAD_12 + chunk.chunkid))
buf.Write([]byte{0, 0, 0})
buf.WriteByte(byte(chunk.length >> 16))
buf.WriteByte(byte(chunk.length >> 8))
buf.WriteByte(byte(chunk.length))
buf.WriteByte(RTMP_MSG_AMF_META)
buf.WriteByte(byte(chunk.streamid))
buf.WriteByte(byte(chunk.streamid >> 8))
buf.WriteByte(byte(chunk.streamid >> 16))
buf.WriteByte(byte(chunk.streamid >> 24))
size := r.writeChunkSize
payload := data.Payload.Bytes()
for {
if len(payload) > size {
buf.Write(payload[0:size])
payload = payload[size:]
if len(payload) > 0 {
buf.WriteByte(byte(RTMP_CHUNK_HEAD_1 + chunk.chunkid))
}
} else {
buf.Write(payload)
break
}
}
return nil
}
func (r *RtmpNewAgent) writeFullVideo(video *MediaFrame) (err error) {
chunk := &RtmpChunk{
RTMP_CHANNEL_VIDEO,
video.Timestamp,
0,
uint32(video.Payload.Len()),
RTMP_MSG_VIDEO,
r.streamid,
video.Timestamp > 0xffffff,
bytes.NewBuffer(nil),
}
r.wchunks[chunk.chunkid] = chunk
buf := chunk.body
buf.WriteByte(byte(RTMP_CHUNK_HEAD_12 + chunk.chunkid))
if chunk.exttimestamp {
buf.Write([]byte{0xff, 0xff, 0xff})
} else {
buf.WriteByte(byte(video.Timestamp >> 16))
buf.WriteByte(byte(video.Timestamp >> 8))
buf.WriteByte(byte(video.Timestamp))
}
buf.WriteByte(byte(chunk.length >> 16))
buf.WriteByte(byte(chunk.length >> 8))
buf.WriteByte(byte(chunk.length))
buf.WriteByte(chunk.mtype)
buf.WriteByte(byte(chunk.streamid))
buf.WriteByte(byte(chunk.streamid >> 8))
buf.WriteByte(byte(chunk.streamid >> 16))
buf.WriteByte(byte(chunk.streamid >> 24))
size := r.writeChunkSize
payload := video.Payload.Bytes()
var chunk4 bool
for {
if len(payload) > size {
buf.Write(payload[0:size])
payload = payload[size:]
if len(payload) > 0 {
if !chunk4 {
buf.Write([]byte{byte(RTMP_CHUNK_HEAD_4 + chunk.chunkid), 0, 0, 0})
} else {
buf.WriteByte(byte(RTMP_CHUNK_HEAD_1 + chunk.chunkid))
chunk4 = true
}
}
} else {
buf.Write(payload)
break
}
}
r.w_buffer.Write(buf.Bytes())
buf.Reset()
return
}
func (r *RtmpNewAgent) writeFullAudio(audio *MediaFrame) (err error) {
chunk := &RtmpChunk{
RTMP_CHANNEL_AUDIO,
audio.Timestamp,
0,
uint32(audio.Payload.Len()),
RTMP_MSG_AUDIO,
r.streamid,
audio.Timestamp > 0xffffff,
bytes.NewBuffer(nil),
}
r.wchunks[chunk.chunkid] = chunk
buf := chunk.body
buf.WriteByte(byte(RTMP_CHUNK_HEAD_12 + chunk.chunkid))
if chunk.exttimestamp {
buf.Write([]byte{0xff, 0xff, 0xff})
} else {
buf.WriteByte(byte(audio.Timestamp >> 16))
buf.WriteByte(byte(audio.Timestamp >> 8))
buf.WriteByte(byte(audio.Timestamp))
}
buf.WriteByte(byte(chunk.length >> 16))
buf.WriteByte(byte(chunk.length >> 8))
buf.WriteByte(byte(chunk.length))
buf.WriteByte(chunk.mtype)
buf.WriteByte(byte(chunk.streamid))
buf.WriteByte(byte(chunk.streamid >> 8))
buf.WriteByte(byte(chunk.streamid >> 16))
buf.WriteByte(byte(chunk.streamid >> 24))
size := r.writeChunkSize
payload := audio.Payload.Bytes()
var chunk4 bool
for {
if len(payload) > size {
buf.Write(payload[0:size])
payload = payload[size:]
if len(payload) > 0 {
if !chunk4 {
buf.Write([]byte{byte(RTMP_CHUNK_HEAD_4 + chunk.chunkid), 0, 0, 0})
} else {
buf.WriteByte(byte(RTMP_CHUNK_HEAD_1 + chunk.chunkid))
chunk4 = true
}
}
} else {
buf.Write(payload)
break
}
}
r.w_buffer.Write(buf.Bytes())
buf.Reset()
return
}
func (r *RtmpNewAgent) writeVideo(video *MediaFrame) (err error) {
chunk, exist := r.wchunks[RTMP_CHANNEL_VIDEO]
if !exist {
return r.writeFullVideo(video)
}
buf := chunk.body
chunk.length = uint32(video.Payload.Len())
buf.WriteByte(byte(RTMP_CHUNK_HEAD_8 + chunk.chunkid))
delta := video.Timestamp - chunk.timestamp
if delta > 0xffffff {
buf.Write([]byte{0xff, 0xff, 0xff})
} else {
buf.WriteByte(byte(delta >> 16))
buf.WriteByte(byte(delta >> 8))
buf.WriteByte(byte(delta))
}
chunk.timestamp += delta
buf.WriteByte(byte(chunk.length >> 16))
buf.WriteByte(byte(chunk.length >> 8))
buf.WriteByte(byte(chunk.length))
buf.WriteByte(chunk.mtype)
if delta > 0xffffff {
buf.WriteByte(byte(delta))
buf.WriteByte(byte(delta >> 8))
buf.WriteByte(byte(delta >> 16))
buf.WriteByte(byte(delta >> 24))
}
size := r.writeChunkSize
payload := video.Payload.Bytes()
var chunk4 bool
for {
if len(payload) > size {
buf.Write(payload[0:size])
payload = payload[size:]
if len(payload) > 0 {
if !chunk4 {
buf.Write([]byte{byte(RTMP_CHUNK_HEAD_4 + chunk.chunkid), 0, 0, 0})
} else {
buf.WriteByte(byte(RTMP_CHUNK_HEAD_1 + chunk.chunkid))
chunk4 = true
}
}
} else {
buf.Write(payload)
break
}
}
r.w_buffer.Write(buf.Bytes())
buf.Reset()
return
}
func (r *RtmpNewAgent) writeAudio(audio *MediaFrame) (err error) {
chunk, exist := r.wchunks[RTMP_CHANNEL_AUDIO]
if !exist {
return r.writeFullAudio(audio)
}
buf := chunk.body
chunk.length = uint32(audio.Payload.Len())
buf.WriteByte(byte(RTMP_CHUNK_HEAD_8 + chunk.chunkid))
delta := audio.Timestamp - chunk.timestamp
//log.Info("audio timestamp", audio.Timestamp, chunk.timestamp, delta)
if delta > 0xffffff {
buf.Write([]byte{0xff, 0xff, 0xff})
} else {
buf.WriteByte(byte(delta >> 16))
buf.WriteByte(byte(delta >> 8))
buf.WriteByte(byte(delta))
}
chunk.timestamp += delta
buf.WriteByte(byte(chunk.length >> 16))
buf.WriteByte(byte(chunk.length >> 8))
buf.WriteByte(byte(chunk.length))
buf.WriteByte(chunk.mtype)
if delta > 0xffffff {
buf.WriteByte(byte(delta))
buf.WriteByte(byte(delta >> 8))
buf.WriteByte(byte(delta >> 16))
buf.WriteByte(byte(delta >> 24))
}
size := r.writeChunkSize
payload := audio.Payload.Bytes()
var chunk4 bool
for {
if len(payload) > size {
buf.Write(payload[0:size])
payload = payload[size:]
if len(payload) > 0 {
if !chunk4 {
buf.Write([]byte{byte(RTMP_CHUNK_HEAD_4 + chunk.chunkid), 0, 0, 0})
} else {
buf.WriteByte(byte(RTMP_CHUNK_HEAD_1 + chunk.chunkid))
chunk4 = true
}
}
} else {
buf.Write(payload)
break
}
}
r.w_buffer.Write(buf.Bytes())
buf.Reset()
return
}