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Cleaning things up and have started thinking about an FLV generator

This commit is contained in:
Saxon Milton 2018-02-10 17:29:56 +10:30
parent e522c34f36
commit 369337cc39
9 changed files with 560 additions and 443 deletions
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3
generator/FLVGenerator.go Normal file
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@ -0,0 +1,3 @@
type FLVGenerator struct {
}

49
generator/Generator.go Normal file
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@ -0,0 +1,49 @@
/*
NAME
RtpToTsConverter.go - provides utilities for the conversion of Rtp packets
to equivalent MpegTs packets.
DESCRIPTION
See Readme.md
AUTHOR
Saxon Nelson-Milton <saxon.milton@gmail.com>
LICENSE
RtpToTsConverter.go is Copyright (C) 2017 the Australian Ocean Lab (AusOcean)
It is free software: you can redistribute it and/or modify them
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with revid in gpl.txt. If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package generator
import (
_"fmt"
_"os"
//"bitbucket.org/ausocean/av/mpegts"
//"bitbucket.org/ausocean/av/pes"
//"bitbucket.org/ausocean/av/tools"
//"bitbucket.org/ausocean/av/rtp"
"../mpegts"
"../pes"
"../tools"
"../rtp"
)
type Generator interface {
GetInputChan() chan []byte
GetOutputChan() <-chan *mpegts.MpegTsPacket
Start()
Stop()
}

52
tsgenerator/TsGenerator.go → generator/MPEGTSGenerator.go
View File

@ -1,45 +1,4 @@
/*
NAME
RtpToTsConverter.go - provides utilities for the conversion of Rtp packets
to equivalent MpegTs packets.
DESCRIPTION
See Readme.md
AUTHOR
Saxon Nelson-Milton <saxon.milton@gmail.com>
LICENSE
RtpToTsConverter.go is Copyright (C) 2017 the Australian Ocean Lab (AusOcean)
It is free software: you can redistribute it and/or modify them
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with revid in gpl.txt. If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package tsgenerator
import (
_"fmt"
_"os"
//"bitbucket.org/ausocean/av/mpegts"
//"bitbucket.org/ausocean/av/pes"
//"bitbucket.org/ausocean/av/tools"
//"bitbucket.org/ausocean/av/rtp"
"../mpegts"
"../pes"
"../tools"
"../rtp"
)
package generator
var (
PatTable = []byte{0, 0, 176, 13, 0, 1, 193, 0, 0, 0, 1, 240, 0, 42, 177, 4, 178, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,}
@ -54,15 +13,6 @@ const (
VideoPid = 256
)
type TsGenerator interface {
generate()
GetNalInputChan() chan []byte
GetTsOutputChan() <-chan *mpegts.MpegTsPacket
Start()
genPts()(pts uint64)
genPcr()(pts uint64)
}
type tsGenerator struct {
TsChan <-chan *mpegts.MpegTsPacket
tsChan chan<- *mpegts.MpegTsPacket

0
tsgenerator/tsgenerator_test.go → generator/tsgenerator_test.go
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63
parser/H264Parser.go Normal file
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@ -0,0 +1,63 @@
package parser
type h264Parser struct {
inputBuffer []byte
isParsing bool
parserOutputChanRef chan []byte
userOutputChanRef chan []byte
inputChan chan byte
}
func NewH264Parser() (p *h264Parser) {
p = new(h264Parser)
p.isParsing = true
p.inputChan = make(chan byte, 10000)
return
}
func (p* h264Parser)Stop(){
p.isParsing = false
}
func (p *h264Parser)Start(){
go p.parse()
}
func (p *h264Parser)GetInputChan() chan byte {
return p.inputChan
}
func (p *h264Parser)GetOutputChan() chan []byte {
return p.userOutputChanRef
}
func (p *h264Parser)SetOutputChan(aChan chan []byte){
p.parserOutputChanRef = aChan
p.userOutputChanRef = aChan
}
func (p *h264Parser)parse() {
outputBuffer := make([]byte, 0, 10000)
searchingForEnd := false
for p.isParsing {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
for i:=1; aByte == 0x00 && i != 4; i++ {
aByte = <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if ( aByte == 0x01 && i == 2 ) || ( aByte == 0x01 && i == 3 ) {
if searchingForEnd {
output := append(append(itut.StartCode1(),itut.AUD()...),outputBuffer[:len(outputBuffer)-(i+1)]...)
p.parserOutputChanRef<-output
outputBuffer = outputBuffer[len(outputBuffer)-1-i:]
searchingForEnd = false
}
aByte = <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if nalType := aByte & 0x1F; nalType == 1 || nalType == 5 {
searchingForEnd = true
}
}
}
}
}

53
parser/MJPEGParser.go Normal file
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@ -0,0 +1,53 @@
package parser
type mjpegParser struct {
inputBuffer []byte
isParsing bool
parserOutputChanRef chan []byte
userOutputChanRef chan []byte
inputChan chan byte
}
func NewMJPEGParser(inputChanLen int) (p *mjpegParser){
p = new(mjpegParser)
p.isParsing = true
p.inputChan = make(chan byte, inputChanLen )
return
}
func (p *mjpegParser)Stop(){
p.isParsing = false
}
func (p *mjpegParser)Start(){
go p.parse()
}
func (p *mjpegParser)GetInputChan() chan byte {
return p.inputChan
}
func (p *mjpegParser)GetOutputChan() chan []byte {
return p.userOutputChanRef
}
func (p *mjpegParser)SetOutputChan(aChan chan []byte){
p.parserOutputChanRef = aChan
p.userOutputChanRef = aChan
}
func (p *mjpegParser)parse() {
var outputBuffer []byte
for p.isParsing {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if aByte == 0xFF && len(outputBuffer) != 0 {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if aByte == 0xD8 {
p.parserOutputChanRef<-outputBuffer[:len(outputBuffer)-2]
outputBuffer = outputBuffer[len(outputBuffer)-2:]
}
}
}
}

115
parser/Parser.go
View File

@ -52,118 +52,3 @@ type Parser interface {
GetOutputChan() chan []byte
SetOutputChan(achan chan []byte)
}
type h264Parser struct {
inputBuffer []byte
isParsing bool
parserOutputChanRef chan []byte
userOutputChanRef chan []byte
inputChan chan byte
}
func NewH264Parser() (p *h264Parser) {
p = new(h264Parser)
p.isParsing = true
p.inputChan = make(chan byte, 10000)
return
}
func (p* h264Parser)Stop(){
p.isParsing = false
}
func (p *h264Parser)Start(){
go p.parse()
}
func (p *h264Parser)GetInputChan() chan byte {
return p.inputChan
}
func (p *h264Parser)GetOutputChan() chan []byte {
return p.userOutputChanRef
}
func (p *h264Parser)SetOutputChan(aChan chan []byte){
p.parserOutputChanRef = aChan
p.userOutputChanRef = aChan
}
func (p *h264Parser)parse() {
outputBuffer := make([]byte, 0, 10000)
searchingForEnd := false
for p.isParsing {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
for i:=1; aByte == 0x00 && i != 4; i++ {
aByte = <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if ( aByte == 0x01 && i == 2 ) || ( aByte == 0x01 && i == 3 ) {
if searchingForEnd {
output := append(append(itut.StartCode1(),itut.AUD()...),outputBuffer[:len(outputBuffer)-(i+1)]...)
p.parserOutputChanRef<-output
outputBuffer = outputBuffer[len(outputBuffer)-1-i:]
searchingForEnd = false
}
aByte = <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if nalType := aByte & 0x1F; nalType == 1 || nalType == 5 {
searchingForEnd = true
}
}
}
}
}
type mjpegParser struct {
inputBuffer []byte
isParsing bool
parserOutputChanRef chan []byte
userOutputChanRef chan []byte
inputChan chan byte
}
func NewMJPEGParser(inputChanLen int) (p *mjpegParser){
p = new(mjpegParser)
p.isParsing = true
p.inputChan = make(chan byte, inputChanLen )
return
}
func (p *mjpegParser)Stop(){
p.isParsing = false
}
func (p *mjpegParser)Start(){
go p.parse()
}
func (p *mjpegParser)GetInputChan() chan byte {
return p.inputChan
}
func (p *mjpegParser)GetOutputChan() chan []byte {
return p.userOutputChanRef
}
func (p *mjpegParser)SetOutputChan(aChan chan []byte){
p.parserOutputChanRef = aChan
p.userOutputChanRef = aChan
}
func (p *mjpegParser)parse() {
var outputBuffer []byte
for p.isParsing {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if aByte == 0xFF && len(outputBuffer) != 0 {
aByte := <-p.inputChan
outputBuffer = append(outputBuffer, aByte)
if aByte == 0xD8 {
p.parserOutputChanRef<-outputBuffer[:len(outputBuffer)-2]
outputBuffer = outputBuffer[len(outputBuffer)-2:]
}
}
}
}

471
revid/RevidInstance.go
View File

@ -115,6 +115,7 @@ const (
Rtmp = 10
Ffmpeg = 11
Revid = 12
Flv = 13
)
// Default config settings
@ -148,13 +149,16 @@ type revidInst struct {
isRunning bool
outputFile *os.File
inputFile *os.File
generator tsgenerator.TsGenerator
generator generator.TsGenerator
parser parser.Parser
cmd *exec.Cmd
ffmpegCmd *exec.Cmd
inputReader *bufio.Reader
ffmpegStdin io.WriteCloser
outputChan chan []byte
configureOutput func()
getFrame func()[]byte
flushData func()
}
// NewRevidInstance returns a pointer to a new revidInst with the desired
@ -167,30 +171,7 @@ func NewRevidInstance(config Config) (r *revidInst, err error) {
if err != nil {
return nil, err
}
switch r.config.Output {
case File:
r.outputFile, err = os.Create(r.config.OutputFileName)
if err != nil {
return nil, err
}
}
switch r.config.InputCodec {
case H264:
r.Log(Info, "Using H264 parser!")
r.parser = parser.NewH264Parser()
case Mjpeg:
r.parser = parser.NewMJPEGParser(mjpegParserInChanLen)
}
r.outputChan = make(chan []byte, 10000)
switch r.config.Packetization {
case None:
r.parser.SetOutputChan(r.outputChan)
case Mpegts:
frameRateAsInt, _ := strconv.Atoi(r.config.FrameRate)
r.generator = tsgenerator.NewTsGenerator(uint(frameRateAsInt))
r.parser.SetOutputChan(r.generator.GetNalInputChan())
r.generator.Start()
}
r.parser.Start()
go r.packClips()
r.Log(Info, "New revid instance created! config is:")
@ -207,6 +188,243 @@ func (r *revidInst) GetConfigRef() *Config {
// configuration; checking validity and returning errors if not valid.
func (r *revidInst) ChangeState(config Config) error {
r.config.Logger = config.Logger
err := checkConfig(config)
if err != nil {
return errors.New("Config struct is bad!: " + err.Error())
}
switch r.config.Output {
case File:
r.outputFile, err = os.Create(r.config.OutputFileName)
if err != nil {
return nil, err
}
configureOutput = configureOutputForFile
case Rtmp:
configureOutput = configureOutputForRtmp
}
switch r.config.Input {
case Raspivid:
configureInput = configureInputForRaspivid
case File:
configureInput = configureInputForFile
}
switch r.config.InputCodec {
case H264:
r.Log(Info, "Using H264 parser!")
r.parser = parser.NewH264Parser()
case Mjpeg:
r.Log(Info, "Using MJPEG parser!")
r.parser = parser.NewMJPEGParser(mjpegParserInChanLen)
}
switch r.config.Packetization {
case None:
r.parser.SetOutputChan(r.outputChan)
getFrame = getFrameForNoPacketization
case Mpegts:
frameRateAsInt, _ := strconv.Atoi(r.config.FrameRate)
r.generator = tsgenerator.NewTsGenerator(uint(frameRateAsInt))
r.parser.SetOutputChan(r.generator.GetNalInputChan())
r.generator.Start()
getFrame = getFrameForMpegtsPacketization
}
r.config = config
return nil
}
// Log takes a logtype and message and tries to send this information to the
// logger provided in the revidInst config - if there is one, otherwise the message
// is sent to stdout
func (r *revidInst) Log(logType, m string) {
if r.config.Logger != nil {
r.config.Logger.Log(logType, m)
} else {
fmt.Println(logType + ": " + m)
}
}
// IsRunning returns true if the revidInst is currently running and false otherwise
func (r *revidInst) IsRunning() bool {
return r.isRunning
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) Start() {
if r.isRunning {
r.Log(Warning, "revidInst.Start() called but revid already running!")
return
}
r.Log(Info, "Starting Revid!")
r.setupOutput()
r.setupInput()
go r.outputClips()
r.isRunning = true
}
// Stop halts any processing of video data from a camera or file
func (r *revidInst) Stop() {
if r.isRunning {
r.Log(Info, "Stopping revid!")
r.isRunning = false
if r.cmd != nil {
r.cmd.Process.Kill()
}
} else {
r.Log(Warning, "revidInst.Stop() called but revid not running!")
}
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) getFrameNoPacketization() []byte {
return <-r.outputChan
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) getFrameWithPacketization() []byte {
return <-(r.generator.GetOutputChan())
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) flushDataNoPacketisation(){
for len(r.outputChan) > 0 {
<-(r.outputChan)
}
}
// Start invokes a revidInst to start processing video from a defined input
func (r *revidInst) flushDataMpegtsPacketisation(){
for len(r.generator.GetOutputChan()) > 0 {
<-(r.generator.GetTsOutputChan())
}
}
// packClips takes data segments; whether that be tsPackets or jpeg frames and
// packs them into clips 1s long.
func (r *revidInst) packClips() {
clipSize := 0
packetCount := 0
now := time.Now()
prevTime := now
for {
if clip, err := r.ringBuffer.Get(); err != nil {
r.Log(Error, err.Error())
r.Log(Warning, "Clearing output chan!")
r.flushOutputData()
} else {
for {
frame := r.getFrame()
lenOfFrame := len(frame)
upperBound := clipSize + lenOfFrame
copy(clip[clipSize:upperBound], frame)
packetCount++
clipSize += lenOfFrame
now = time.Now()
if packetCount >= r.config.FramesPerClip {
if err := r.ringBuffer.DoneWriting(clipSize); err != nil {
r.Log(Error, err.Error())
r.Log(Warning, "Dropping clip!")
}
clipSize = 0
packetCount = 0
prevTime = now
break
}
}
}
}
}
// outputClips takes the clips produced in the packClips method and outputs them
// to the desired output defined in the revidInst config
func (r *revidInst) outputClips() {
now := time.Now()
prevTime := now
bytes := 0
delay := 0
for r.isRunning {
// Here we slow things down as much as we can to decrease cpu usage
switch {
case r.ringBuffer.GetNoOfElements() < 2:
delay++
time.Sleep(time.Duration(delay) * time.Millisecond)
case delay > 10:
delay -= 10
}
// If the ringbuffer has something we can read and send off
if clip, err := r.ringBuffer.Read(); err == nil {
r.Log(Debug, fmt.Sprintf("Delay is: %v\n", delay))
r.Log(Debug, fmt.Sprintf("Ring buffer size: %v\n", r.ringBuffer.GetNoOfElements()))
// Output clip to the output specified in the configuration struct
bytes += len(clip)
for err := r.sendClip(clip); err != nil; {
r.Log(Error, err.Error())
r.Log(Warning, "Send failed trying again!")
err = r.sendClip(clip)
}
if err := r.ringBuffer.DoneReading(); err != nil {
r.Log(Error, err.Error())
}
// Log some information regarding bitrate and ring buffer size if it's time
now = time.Now()
deltaTime := now.Sub(prevTime)
if deltaTime > time.Duration(bitrateTime)*time.Second {
r.Log(Info, fmt.Sprintf("Bitrate: %v bits/s\n", int64(float64(bytes*8)/float64(deltaTime/1e9))))
r.Log(Info, fmt.Sprintf("Ring buffer size: %v\n", r.ringBuffer.GetNoOfElements()))
prevTime = now
bytes = 0
}
}
}
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) sendClipToFile(clip []byte) error {
err := r.outputFile.Write(clip)
if err != nil {
return err
}
return nil
}
// sendClipToHTTP takes a clip and an output url and posts through http.
func (r *revidInst) sendClipToHTTP(clip []byte) error {
timeout := time.Duration(httpTimeOut * time.Second)
client := http.Client{
Timeout: timeout,
}
r.Log(Debug, fmt.Sprintf("Posting %s (%d bytes)\n", url, len(clip)))
resp, err := client.Post(r.config.HttpAddress + strconv.Itoa(len(clip)), "video/mp2t", bytes.NewReader(clip)) // lighter than NewBuffer
if err != nil {
return fmt.Errorf("Error posting to %s: %s", output, err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err == nil {
r.Log(Debug, fmt.Sprintf("%s\n", body))
} else {
r.Log(Error, err.Error())
}
return nil
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) sendClipToRtmp(clip []byte) error {
fmt.Println("Outputting!")
_, err := r.ffmpegStdin.Write(clip)
if err != nil {
return err
}
return nil
}
// checkConfig checks for any errors in the config files and defaults settings
// if particular parameters have not been defined.
func (r *revidInst) checkConfig(config Config) error {
switch config.Input {
case Rtp:
case Raspivid:
@ -276,7 +494,7 @@ func (r *revidInst) ChangeState(config Config) error {
}
switch {
case config.FramesPerClip >= 0:
case config.FramesPerClip > 0:
case config.FramesPerClip == 0:
r.Log(Warning, "No frames per clip defined, defaulting to 1!")
config.FramesPerClip = 1
@ -284,11 +502,6 @@ func (r *revidInst) ChangeState(config Config) error {
return errors.New("Bad frames per clip given!")
}
if config.FramesPerClip == 0 {
r.Log(Warning, "No frames per clip define, defaulting to 1!")
config.FramesPerClip = 1
} else {}
if config.Width == "" {
r.Log(Warning, "No width defined, defaulting to 1280!")
config.Width = defaultWidth
@ -342,37 +555,11 @@ func (r *revidInst) ChangeState(config Config) error {
return errors.New("Bad quantization defined in config!")
}
}
r.config = config
return nil
}
// Log takes a logtype and message and tries to send this information to the
// logger provided in the revidInst config - if there is one, otherwise the message
// is sent to stdout
func (r *revidInst) Log(logType, m string) {
if r.config.Logger != nil {
r.config.Logger.Log(logType, m)
} else {
fmt.Println(logType + ": " + m)
}
}
// IsRunning returns true if the revidInst is currently running and false otherwise
func (r *revidInst) IsRunning() bool {
return r.isRunning
}
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) Start() {
if r.isRunning {
r.Log(Warning, "revidInst.Start() called but revid already running!")
return
}
r.Log(Info, "Starting Revid!")
// Configure output
switch r.config.Output {
case Rtmp:
func (r *revidInst) setupOutputForRtmp(){
r.ffmpegCmd = exec.Command(ffmpegPath,
"-f", "h264",
"-r", r.config.FrameRate,
@ -401,11 +588,11 @@ func (r *revidInst) Start() {
r.Stop()
return
}
}
}
// Configure input
switch r.config.Input {
case Raspivid:
// Start invokes a revidInst to start processing video from a defined input
// and packetising to a defined output.
func (r *revidInst) setupInputForRaspivid(){
r.Log(Info, "Starting raspivid!")
switch r.config.InputCodec {
case H264:
@ -439,11 +626,11 @@ func (r *revidInst) Start() {
return
}
go r.readCamera()
case File:
}
// Start invokes a revidInst to start processing video from a defined input
func (r *revidInst) setupInputForFile(){
go r.readFile()
}
go r.outputClips()
r.isRunning = true
}
// readCamera reads data from the defined camera while the revidInst is running.
@ -496,157 +683,3 @@ func (r *revidInst) readFile() {
}
}
}
// Stop halts any processing of video data from a camera
func (r *revidInst) Stop() {
if r.isRunning {
r.Log(Info, "Stopping revid!")
r.isRunning = false
if r.cmd != nil {
r.cmd.Process.Kill()
}
} else {
r.Log(Warning, "revidInst.Stop() called but revid not running!")
}
}
// packClips takes data segments; whether that be tsPackets or jpeg frames and
// packs them into clips 1s long.
func (r *revidInst) packClips() {
clipSize := 0
packetCount := 0
now := time.Now()
prevTime := now
for {
if clip, err := r.ringBuffer.Get(); err != nil {
r.Log(Error, err.Error())
switch r.config.Packetization {
case None:
r.Log(Warning, "Clearing mjpeg chan!")
for len(r.outputChan) > 0 {
<-(r.outputChan)
}
case Mpegts:
r.Log(Warning, "Clearing TS chan!")
for len(r.generator.GetTsOutputChan()) > 0 {
<-(r.generator.GetTsOutputChan())
}
}
time.Sleep(1 * time.Second)
} else {
for {
switch r.config.Packetization {
case None:
frame := <-r.outputChan
upperBound := clipSize + len(frame)
copy(clip[clipSize:upperBound], frame)
packetCount++
clipSize += len(frame)
case Mpegts:
tsPacket := <-(r.generator.GetTsOutputChan())
tsByteSlice, err := tsPacket.ToByteSlice()
if err != nil {
r.Log(Error, err.Error())
}
upperBound := clipSize + mp2tPacketSize
copy(clip[clipSize:upperBound], tsByteSlice)
packetCount++
clipSize += mp2tPacketSize
}
// send if (1) our buffer is full or (2) 1 second has elapsed and we have % packetsPerFrame
now = time.Now()
if packetCount > r.config.FramesPerClip {
if err := r.ringBuffer.DoneWriting(clipSize); err != nil {
r.Log(Error, err.Error())
r.Log(Warning, "Dropping clip!")
}
clipSize = 0
packetCount = 0
prevTime = now
break
}
}
}
}
}
// outputClips takes the clips produced in the packClips method and outputs them
// to the desired output defined in the revidInst config
func (r *revidInst) outputClips() {
now := time.Now()
prevTime := now
bytes := 0
delay := 0
for r.isRunning {
// Here we slow things down as much as we can to decrease cpu usage
switch {
case r.ringBuffer.GetNoOfElements() < 2:
delay++
time.Sleep(time.Duration(delay) * time.Millisecond)
case delay > 10:
delay -= 10
}
// If the ringbuffer has something we can read and send off
if clip, err := r.ringBuffer.Read(); err == nil {
r.Log(Debug, fmt.Sprintf("Delay is: %v\n", delay))
r.Log(Debug, fmt.Sprintf("Ring buffer size: %v\n", r.ringBuffer.GetNoOfElements()))
// Output clip to the output specified in the configuration struct
switch r.config.Output {
case File:
r.outputFile.Write(clip)
case HttpOut:
bytes += len(clip)
for err := r.sendClipToHTTP(clip, r.config.HttpAddress); err != nil; {
r.Log(Error, err.Error())
r.Log(Warning, "Post failed trying again!")
err = r.sendClipToHTTP(clip, r.config.HttpAddress)
}
case Rtmp:
fmt.Println("Outputting!")
_, err := r.ffmpegStdin.Write(clip)
if err != nil {
r.Log(Error, err.Error())
}
default:
r.Log(Error, "No output defined!")
}
if err := r.ringBuffer.DoneReading(); err != nil {
r.Log(Error, err.Error())
}
// Log some information regarding bitrate and ring buffer size if it's time
now = time.Now()
deltaTime := now.Sub(prevTime)
if deltaTime > time.Duration(bitrateTime)*time.Second {
r.Log(Info, fmt.Sprintf("Bitrate: %v bits/s\n", int64(float64(bytes*8)/float64(deltaTime/1e9))))
r.Log(Info, fmt.Sprintf("Ring buffer size: %v\n", r.ringBuffer.GetNoOfElements()))
prevTime = now
bytes = 0
}
}
}
}
// sendClipToHTTP takes a clip and an output url and posts through http.
func (r *revidInst) sendClipToHTTP(clip []byte, output string) error {
timeout := time.Duration(httpTimeOut * time.Second)
client := http.Client{
Timeout: timeout,
}
url := output + strconv.Itoa(len(clip))
r.Log(Debug, fmt.Sprintf("Posting %s (%d bytes)\n", url, len(clip)))
resp, err := client.Post(url, "video/mp2t", bytes.NewReader(clip)) // lighter than NewBuffer
if err != nil {
return fmt.Errorf("Error posting to %s: %s", output, err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err == nil {
r.Log(Debug, fmt.Sprintf("%s\n", body))
} else {
r.Log(Error, err.Error())
}
return nil
}

81
revid/rtmpPublisher.go Normal file
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@ -0,0 +1,81 @@
package main
import (
"flag"
"fmt"
"os"
"time"
"github.com/zhangpeihao/goflv"
rtmp "github.com/zhangpeihao/gortmp"
"github.com/zhangpeihao/log"
)
const (
programName = "RtmpPublisher"
version = "0.0.1"
)
var (
url *string = flag.String("URL", "rtmp://video-center.alivecdn.com/AppName/StreamName?vhost=live.gz-app.com", "The rtmp url to connect.")
streamName *string = flag.String("Stream", "camstream", "Stream name to play.")
flvFileName *string = flag.String("FLV", "./v_4097.flv", "FLV file to publishs.")
)
var obConn rtmp.OutboundConn
var createStreamChan chan rtmp.OutboundStream
var videoDataSize int64
var audioDataSize int64
var flvFile *flv.File
var status uint
func publish(stream rtmp.OutboundStream) {
startTs := uint32(0)
startAt := time.Now().UnixNano()
preTs := uint32(0)
for status == rtmp.OUTBOUND_CONN_STATUS_CREATE_STREAM_OK {
fmt.Printf("@@@@@@@@@@@@@@diff1 header(%+v), startTs: %d\n", header, startTs)
if err = stream.PublishData(header.TagType, data, diff1); err != nil {
fmt.Println("PublishData() error:", err)
break
}
}
}
func main() {
createStreamChan = make(chan rtmp.OutboundStream)
testHandler := &TestOutboundConnHandler{}
fmt.Println("to dial")
fmt.Println("a")
var err error
obConn, err = rtmp.Dial(*url, testHandler, 100)
if err != nil {
fmt.Println("Dial error", err)
os.Exit(-1)
}
fmt.Println("b")
defer obConn.Close()
fmt.Println("to connect")
err = obConn.Connect()
if err != nil {
fmt.Printf("Connect error: %s", err.Error())
os.Exit(-1)
}
fmt.Println("c")
for {
select {
case stream := <-createStreamChan:
// Publish
stream.Attach(testHandler)
err = stream.Publish(*streamName, "live")
if err != nil {
fmt.Printf("Publish error: %s", err.Error())
os.Exit(-1)
}
case <-time.After(1 * time.Second):
fmt.Printf("Audio size: %d bytes; Vedio size: %d bytes\n", audioDataSize, videoDataSize)
}
}
}