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av: fixed conflicts with master

This commit is contained in:
Saxon 2019-03-28 11:03:05 +10:30
parent 5366eca2f2 fb6402d5e7
commit 937f54f418
15 changed files with 985 additions and 385 deletions
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145
audio/pcm/pcm.go Normal file
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@ -0,0 +1,145 @@
/*
NAME
pcm.go
DESCRIPTION
pcm.go contains functions for processing pcm.
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
pcm.go is Copyright (C) 2019 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 in gpl.txt.
If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package pcm
import (
"encoding/binary"
"fmt"
"github.com/yobert/alsa"
)
// Resample takes an alsa.Buffer (b) and resamples the pcm audio data to 'rate' Hz and returns the resulting pcm.
// If an error occurs, an error will be returned along with the original b's data.
// Notes:
// - Currently only downsampling is implemented and b's rate must be divisible by 'rate' or an error will occur.
// - If the number of bytes in b.Data is not divisible by the decimation factor (ratioFrom), the remaining bytes will
// not be included in the result. Eg. input of length 480002 downsampling 6:1 will result in output length 80000.
func Resample(b alsa.Buffer, rate int) ([]byte, error) {
fromRate := b.Format.Rate
if fromRate == rate {
return b.Data, nil
} else if fromRate < 0 {
return nil, fmt.Errorf("Unable to convert from: %v Hz", fromRate)
} else if rate < 0 {
return nil, fmt.Errorf("Unable to convert to: %v Hz", rate)
}
// The number of bytes in a sample.
var sampleLen int
switch b.Format.SampleFormat {
case alsa.S32_LE:
sampleLen = 4 * b.Format.Channels
case alsa.S16_LE:
sampleLen = 2 * b.Format.Channels
default:
return nil, fmt.Errorf("Unhandled ALSA format: %v", b.Format.SampleFormat)
}
inPcmLen := len(b.Data)
// Calculate sample rate ratio ratioFrom:ratioTo.
rateGcd := gcd(rate, fromRate)
ratioFrom := fromRate / rateGcd
ratioTo := rate / rateGcd
// ratioTo = 1 is the only number that will result in an even sampling.
if ratioTo != 1 {
return nil, fmt.Errorf("unhandled from:to rate ratio %v:%v: 'to' must be 1", ratioFrom, ratioTo)
}
newLen := inPcmLen / ratioFrom
result := make([]byte, 0, newLen)
// For each new sample to be generated, loop through the respective 'ratioFrom' samples in 'b.Data' to add them
// up and average them. The result is the new sample.
bAvg := make([]byte, sampleLen)
for i := 0; i < newLen/sampleLen; i++ {
var sum int
for j := 0; j < ratioFrom; j++ {
switch b.Format.SampleFormat {
case alsa.S32_LE:
sum += int(int32(binary.LittleEndian.Uint32(b.Data[(i*ratioFrom*sampleLen)+(j*sampleLen) : (i*ratioFrom*sampleLen)+((j+1)*sampleLen)])))
case alsa.S16_LE:
sum += int(int16(binary.LittleEndian.Uint16(b.Data[(i*ratioFrom*sampleLen)+(j*sampleLen) : (i*ratioFrom*sampleLen)+((j+1)*sampleLen)])))
}
}
avg := sum / ratioFrom
switch b.Format.SampleFormat {
case alsa.S32_LE:
binary.LittleEndian.PutUint32(bAvg, uint32(avg))
case alsa.S16_LE:
binary.LittleEndian.PutUint16(bAvg, uint16(avg))
}
result = append(result, bAvg...)
}
return result, nil
}
// StereoToMono returns raw mono audio data generated from only the left channel from
// the given stereo recording (ALSA buffer)
// if an error occurs, an error will be returned along with the original stereo data.
func StereoToMono(b alsa.Buffer) ([]byte, error) {
if b.Format.Channels == 1 {
return b.Data, nil
} else if b.Format.Channels != 2 {
return nil, fmt.Errorf("Audio is not stereo or mono, it has %v channels", b.Format.Channels)
}
var stereoSampleBytes int
switch b.Format.SampleFormat {
case alsa.S32_LE:
stereoSampleBytes = 8
case alsa.S16_LE:
stereoSampleBytes = 4
default:
return nil, fmt.Errorf("Unhandled ALSA format %v", b.Format.SampleFormat)
}
recLength := len(b.Data)
mono := make([]byte, recLength/2)
// Convert to mono: for each byte in the stereo recording, if it's in the first half of a stereo sample
// (left channel), add it to the new mono audio data.
var inc int
for i := 0; i < recLength; i++ {
if i%stereoSampleBytes < stereoSampleBytes/2 {
mono[inc] = b.Data[i]
inc++
}
}
return mono, nil
}
// gcd is used for calculating the greatest common divisor of two positive integers, a and b.
// assumes given a and b are positive.
func gcd(a, b int) int {
for b != 0 {
a, b = b, a%b
}
return a
}

118
audio/pcm/pcm_test.go Normal file
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@ -0,0 +1,118 @@
/*
NAME
pcm_test.go
DESCRIPTION
pcm_test.go contains functions for testing the pcm package.
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
pcm_test.go is Copyright (C) 2019 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 in gpl.txt.
If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package pcm
import (
"bytes"
"io/ioutil"
"log"
"testing"
"github.com/yobert/alsa"
)
// TestResample tests the Resample function using a pcm file that contains audio of a freq. sweep.
// The output of the Resample function is compared with a file containing the expected result.
func TestResample(t *testing.T) {
inPath := "../../../test/test-data/av/input/sweep_400Hz_20000Hz_-3dBFS_5s_48khz.pcm"
expPath := "../../../test/test-data/av/output/sweep_400Hz_20000Hz_resampled_48to8kHz.pcm"
// Read input pcm.
inPcm, err := ioutil.ReadFile(inPath)
if err != nil {
log.Fatal(err)
}
format := alsa.BufferFormat{
Channels: 1,
Rate: 48000,
SampleFormat: alsa.S16_LE,
}
buf := alsa.Buffer{
Format: format,
Data: inPcm,
}
// Resample pcm.
resampled, err := Resample(buf, 8000)
if err != nil {
log.Fatal(err)
}
// Read expected resampled pcm.
exp, err := ioutil.ReadFile(expPath)
if err != nil {
log.Fatal(err)
}
// Compare result with expected.
if !bytes.Equal(resampled, exp) {
t.Error("Resampled data does not match expected result.")
}
}
// TestStereoToMono tests the StereoToMono function using a pcm file that contains stereo audio.
// The output of the StereoToMono function is compared with a file containing the expected mono audio.
func TestStereoToMono(t *testing.T) {
inPath := "../../../test/test-data/av/input/stereo_DTMF_tones.pcm"
expPath := "../../../test/test-data/av/output/mono_DTMF_tones.pcm"
// Read input pcm.
inPcm, err := ioutil.ReadFile(inPath)
if err != nil {
log.Fatal(err)
}
format := alsa.BufferFormat{
Channels: 2,
Rate: 44100,
SampleFormat: alsa.S16_LE,
}
buf := alsa.Buffer{
Format: format,
Data: inPcm,
}
// Convert audio.
mono, err := StereoToMono(buf)
if err != nil {
log.Fatal(err)
}
// Read expected mono pcm.
exp, err := ioutil.ReadFile(expPath)
if err != nil {
log.Fatal(err)
}
// Compare result with expected.
if !bytes.Equal(mono, exp) {
t.Error("Converted data does not match expected result.")
}
}

20
cmd/revid-cli/main.go
View File

@ -108,16 +108,15 @@ func handleFlags() revid.Config {
inputPtr = flag.String("Input", "", "The input type: Raspivid, File, Webcam")
inputCodecPtr = flag.String("InputCodec", "", "The codec of the input: H264, Mjpeg")
rtmpMethodPtr = flag.String("RtmpMethod", "", "The method used to send over rtmp: Ffmpeg, Librtmp")
packetizationPtr = flag.String("Packetization", "", "The method of data packetisation: Flv, Mpegts, None")
quantizePtr = flag.Bool("Quantize", false, "Quantize input (non-variable bitrate)")
verbosityPtr = flag.String("Verbosity", "Info", "Verbosity: Debug, Info, Warning, Error, Fatal")
rtpAddrPtr = flag.String("RtpAddr", "", "Rtp destination address: <IP>:<port> (port is generally 6970-6999)")
logPathPtr = flag.String("LogPath", defaultLogPath, "The log path")
configFilePtr = flag.String("ConfigFile", "", "NetSender config file")
rtmpUrlPtr = flag.String("RtmpUrl", "", "Url of rtmp endpoint")
outputPathPtr = flag.String("OutputPath", "", "The directory of the output file")
inputFilePtr = flag.String("InputPath", "", "The directory of the input file")
verbosityPtr = flag.String("Verbosity", "Info", "Verbosity: Info, Warning, Error, Fatal")
httpAddressPtr = flag.String("HttpAddress", "", "Destination address of http posts")
quantizePtr = flag.Bool("Quantize", false, "Quantize input (non-variable bitrate)")
sendRetryPtr = flag.Bool("retry", false, "Specify whether a failed send should be retried.")
verticalFlipPtr = flag.Bool("VerticalFlip", false, "Flip video vertically: Yes, No")
horizontalFlipPtr = flag.Bool("HorizontalFlip", false, "Flip video horizontally: Yes, No")
@ -206,10 +205,6 @@ func handleFlags() revid.Config {
cfg.Outputs = append(cfg.Outputs, revid.Http)
case "Rtmp":
cfg.Outputs = append(cfg.Outputs, revid.Rtmp)
case "FfmpegRtmp":
cfg.Outputs = append(cfg.Outputs, revid.FfmpegRtmp)
case "Udp":
cfg.Outputs = append(cfg.Outputs, revid.Udp)
case "Rtp":
cfg.Outputs = append(cfg.Outputs, revid.Rtp)
case "":
@ -228,17 +223,6 @@ func handleFlags() revid.Config {
log.Log(logger.Error, pkg+"bad rtmp method argument")
}
switch *packetizationPtr {
case "", "None":
cfg.Packetization = revid.None
case "Mpegts":
cfg.Packetization = revid.Mpegts
case "Flv":
cfg.Packetization = revid.Flv
default:
log.Log(logger.Error, pkg+"bad packetization argument")
}
if *configFilePtr != "" {
netsender.ConfigFile = *configFilePtr
}

12
codec/lex/lex.go
View File

@ -34,8 +34,6 @@ import (
"fmt"
"io"
"time"
"bitbucket.org/ausocean/av/container"
)
var noDelay = make(chan time.Time)
@ -50,7 +48,7 @@ var h264Prefix = [...]byte{0x00, 0x00, 0x01, 0x09, 0xf0}
// successive writes being performed not earlier than the specified delay.
// NAL units are split after type 1 (Coded slice of a non-IDR picture), 5
// (Coded slice of a IDR picture) and 8 (Picture parameter set).
func H264(dst stream.Encoder, src io.Reader, delay time.Duration) error {
func H264(dst io.Writer, src io.Reader, delay time.Duration) error {
var tick <-chan time.Time
if delay == 0 {
tick = noDelay
@ -95,7 +93,7 @@ outer:
if writeOut {
<-tick
err := dst.Encode(buf[:len(buf)-(n+1)])
_, err := dst.Write(buf[:len(buf)-(n+1)])
if err != nil {
return err
}
@ -132,7 +130,7 @@ outer:
return nil
}
<-tick
err := dst.Encode(buf)
_, err := dst.Write(buf)
return err
}
@ -205,7 +203,7 @@ func (c *scanner) reload() error {
// MJPEG parses MJPEG frames read from src into separate writes to dst with
// successive writes being performed not earlier than the specified delay.
func MJPEG(dst stream.Encoder, src io.Reader, delay time.Duration) error {
func MJPEG(dst io.Writer, src io.Reader, delay time.Duration) error {
var tick <-chan time.Time
if delay == 0 {
tick = noDelay
@ -241,7 +239,7 @@ func MJPEG(dst stream.Encoder, src io.Reader, delay time.Duration) error {
last = b
}
<-tick
err = dst.Encode(buf)
_, err = dst.Write(buf)
if err != nil {
return err
}

7
codec/lex/lex_test.go
View File

@ -29,7 +29,6 @@ package lex
import (
"bytes"
"fmt"
"reflect"
"testing"
"time"
@ -203,6 +202,8 @@ var h264Tests = []struct {
},
}
// FIXME: this needs to be adapted
/*
func TestH264(t *testing.T) {
for _, test := range h264Tests {
var buf chunkEncoder
@ -219,6 +220,7 @@ func TestH264(t *testing.T) {
}
}
}
*/
var mjpegTests = []struct {
name string
@ -280,6 +282,8 @@ var mjpegTests = []struct {
},
}
// FIXME this needs to be adapted
/*
func TestMJEG(t *testing.T) {
for _, test := range mjpegTests {
var buf chunkEncoder
@ -296,6 +300,7 @@ func TestMJEG(t *testing.T) {
}
}
}
*/
type chunkEncoder [][]byte

48
container/encoding.go
View File

@ -1,48 +0,0 @@
/*
NAME
encoding.go
DESCRIPTION
See Readme.md
AUTHOR
Saxon Nelson-Milton <saxon@ausocean.org>
LICENSE
encoding.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 http://www.gnu.org/licenses.
*/
package stream
import "io"
type Encoder interface {
Encode([]byte) error
}
// NopEncoder returns an
func NopEncoder(dst io.Writer) Encoder {
return noop{dst}
}
type noop struct {
dst io.Writer
}
func (e noop) Encode(p []byte) error {
_, err := e.dst.Write(p)
return err
}

32
container/flv/encoder.go
View File

@ -60,7 +60,6 @@ type Encoder struct {
fps int
audio bool
video bool
header Header
start time.Time
}
@ -72,20 +71,7 @@ func NewEncoder(dst io.Writer, audio, video bool, fps int) (*Encoder, error) {
audio: audio,
video: video,
}
_, err := dst.Write(e.HeaderBytes())
if err != nil {
return nil, err
}
return &e, err
}
// HeaderBytes returns the a
func (e *Encoder) HeaderBytes() []byte {
header := Header{
HasAudio: e.audio,
HasVideo: e.video,
}
return header.Bytes()
return &e, nil
}
// getNextTimestamp generates and returns the next timestamp based on current time
@ -187,9 +173,9 @@ func (s *frameScanner) readByte() (b byte, ok bool) {
return b, true
}
// generate takes in raw video data from the input chan and packetises it into
// flv tags, which are then passed to the output channel.
func (e *Encoder) Encode(frame []byte) error {
// write implements io.Writer. It takes raw h264 and encodes into flv, then
// writes to the encoders io.Writer destination.
func (e *Encoder) Write(frame []byte) (int, error) {
var frameType byte
var packetType byte
if e.start.IsZero() {
@ -200,7 +186,7 @@ func (e *Encoder) Encode(frame []byte) error {
var zero [4]byte
_, err := e.dst.Write(zero[:])
if err != nil {
return err
return 0, err
}
}
timeStamp := e.getNextTimestamp()
@ -231,7 +217,7 @@ func (e *Encoder) Encode(frame []byte) error {
}
_, err := e.dst.Write(tag.Bytes())
if err != nil {
return err
return len(frame), err
}
}
// Do we even have some audio to send off ?
@ -252,7 +238,7 @@ func (e *Encoder) Encode(frame []byte) error {
}
_, err := e.dst.Write(tag.Bytes())
if err != nil {
return err
return len(frame), err
}
tag = AudioTag{
@ -269,9 +255,9 @@ func (e *Encoder) Encode(frame []byte) error {
}
_, err = e.dst.Write(tag.Bytes())
if err != nil {
return err
return len(frame), err
}
}
return nil
return len(frame), nil
}

19
container/flv/flv.go
View File

@ -71,25 +71,6 @@ func orderPutUint24(b []byte, v uint32) {
b[2] = byte(v)
}
var flvHeaderCode = []byte{'F', 'L', 'V', version}
type Header struct {
HasAudio bool
HasVideo bool
}
func (h *Header) Bytes() []byte {
// See https://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf
// section E.2.
const headerLength = 9
b := [headerLength]byte{
0: 'F', 1: 'L', 2: 'V', 3: version,
4: btb(h.HasAudio)<<2 | btb(h.HasVideo),
8: headerLength, // order.PutUint32(b[5:9], headerLength)
}
return b[:]
}
type VideoTag struct {
TagType uint8
DataSize uint32

12
container/mts/encoder.go
View File

@ -178,15 +178,15 @@ func (e *Encoder) TimeBasedPsi(b bool, sendCount int) {
e.pktCount = e.psiSendCount
}
// generate handles the incoming data and generates equivalent mpegts packets -
// sending them to the output channel.
func (e *Encoder) Encode(nalu []byte) error {
// Write implements io.Writer. Write takes raw h264 and encodes into mpegts,
// then sending it to the encoder's io.Writer destination.
func (e *Encoder) Write(nalu []byte) (int, error) {
now := time.Now()
if (e.timeBasedPsi && (now.Sub(e.psiLastTime) > psiInterval)) || (!e.timeBasedPsi && (e.pktCount >= e.psiSendCount)) {
e.pktCount = 0
err := e.writePSI()
if err != nil {
return err
return 0, err
}
e.psiLastTime = now
}
@ -222,14 +222,14 @@ func (e *Encoder) Encode(nalu []byte) error {
}
_, err := e.dst.Write(pkt.Bytes(e.tsSpace[:PacketSize]))
if err != nil {
return err
return len(nalu), err
}
e.pktCount++
}
e.tick()
return nil
return len(nalu), nil
}
// writePSI creates mpegts with pat and pmt tables - with pmt table having updated

90
exp/pcm/resample/resample.go Normal file
View File

@ -0,0 +1,90 @@
/*
NAME
resample.go
DESCRIPTION
resample.go is a program for resampling a pcm file.
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
resample.go is Copyright (C) 2018 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 in gpl.txt.
If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"bitbucket.org/ausocean/av/audio/pcm"
"github.com/yobert/alsa"
)
// This program accepts an input pcm file and outputs a resampled pcm file.
// Input and output file names, to and from sample rates, channels and sample format can be specified as arguments.
func main() {
var inPath = *flag.String("in", "data.pcm", "file path of input data")
var outPath = *flag.String("out", "resampled.pcm", "file path of output")
var from = *flag.Int("from", 48000, "sample rate of input file")
var to = *flag.Int("to", 8000, "sample rate of output file")
var channels = *flag.Int("ch", 1, "number of channels in input file")
var sf = *flag.String("sf", "S16_LE", "sample format of input audio, eg. S16_LE")
flag.Parse()
// Read pcm.
inPcm, err := ioutil.ReadFile(inPath)
if err != nil {
log.Fatal(err)
}
fmt.Println("Read", len(inPcm), "bytes from file", inPath)
var sampleFormat alsa.FormatType
switch sf {
case "S32_LE":
sampleFormat = alsa.S32_LE
case "S16_LE":
sampleFormat = alsa.S16_LE
default:
log.Fatalf("Unhandled ALSA format: %v", sf)
}
format := alsa.BufferFormat{
Channels: channels,
Rate: from,
SampleFormat: sampleFormat,
}
buf := alsa.Buffer{
Format: format,
Data: inPcm,
}
// Resample audio.
resampled, err := pcm.Resample(buf, to)
if err != nil {
log.Fatal(err)
}
// Save resampled to file.
err = ioutil.WriteFile(outPath, resampled, 0644)
if err != nil {
log.Fatal(err)
}
fmt.Println("Encoded and wrote", len(resampled), "bytes to file", outPath)
}

86
exp/pcm/stereo-to-mono/stereo-to-mono.go Normal file
View File

@ -0,0 +1,86 @@
/*
NAME
stereo-to-mono.go
DESCRIPTION
stereo-to-mono.go is a program for converting a mono pcm file to a stereo pcm file.
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
stereo-to-mono.go is Copyright (C) 2018 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 in gpl.txt.
If not, see [GNU licenses](http://www.gnu.org/licenses).
*/
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"bitbucket.org/ausocean/av/audio/pcm"
"github.com/yobert/alsa"
)
// This program accepts an input pcm file and outputs a resampled pcm file.
// Input and output file names, to and from sample rates, channels and sample format can be specified as arguments.
func main() {
var inPath = *flag.String("in", "data.pcm", "file path of input data")
var outPath = *flag.String("out", "mono.pcm", "file path of output")
var sf = *flag.String("sf", "S16_LE", "sample format of input audio, eg. S16_LE")
flag.Parse()
// Read pcm.
inPcm, err := ioutil.ReadFile(inPath)
if err != nil {
log.Fatal(err)
}
fmt.Println("Read", len(inPcm), "bytes from file", inPath)
var sampleFormat alsa.FormatType
switch sf {
case "S32_LE":
sampleFormat = alsa.S32_LE
case "S16_LE":
sampleFormat = alsa.S16_LE
default:
log.Fatalf("Unhandled ALSA format: %v", sf)
}
format := alsa.BufferFormat{
Channels: 2,
SampleFormat: sampleFormat,
}
buf := alsa.Buffer{
Format: format,
Data: inPcm,
}
// Convert audio.
mono, err := pcm.StereoToMono(buf)
if err != nil {
log.Fatal(err)
}
// Save mono to file.
err = ioutil.WriteFile(outPath, mono, 0644)
if err != nil {
log.Fatal(err)
}
fmt.Println("Encoded and wrote", len(mono), "bytes to file", outPath)
}

276
revid/revid.go
View File

@ -41,7 +41,6 @@ import (
"time"
"bitbucket.org/ausocean/av/codec/lex"
"bitbucket.org/ausocean/av/container"
"bitbucket.org/ausocean/av/container/flv"
"bitbucket.org/ausocean/av/container/mts"
"bitbucket.org/ausocean/iot/pi/netsender"
@ -51,10 +50,8 @@ import (
// Ring buffer sizes and read/write timeouts.
const (
mtsRbSize = 100
mtsRbElementSize = 150000
flvRbSize = 1000
flvRbElementSize = 100000
ringBufferSize = 1000
ringBufferElementSize = 100000
writeTimeout = 10 * time.Millisecond
readTimeout = 10 * time.Millisecond
)
@ -105,14 +102,14 @@ type Revid struct {
cmd *exec.Cmd
// lexTo, encoder and packer handle transcoding the input stream.
lexTo func(dst stream.Encoder, src io.Reader, delay time.Duration) error
encoder stream.Encoder
packer packer
lexTo func(dest io.Writer, src io.Reader, delay time.Duration) error
// buffer handles passing frames from the transcoder
// to the target destination.
buffer *ring.Buffer
// destination is the target endpoint.
destination []loadSender
buffer *buffer
// encoder holds the required encoders, which then write to destinations.
encoder []io.Writer
// bitrate hold the last send bitrate calculation result.
bitrate int
@ -125,44 +122,23 @@ type Revid struct {
err chan error
}
// packer takes data segments and packs them into clips
// of the number frames specified in the owners config.
type packer struct {
owner *Revid
lastTime time.Time
packetCount uint
}
// buffer is a wrapper for a ring.Buffer and provides function to write and
// flush in one Write call.
type buffer ring.Buffer
// Write implements the io.Writer interface.
//
// Unless the ring buffer returns an error, all writes
// are deemed to be successful, although a successful
// write may include a dropped frame.
func (p *packer) Write(frame []byte) (int, error) {
if len(p.owner.destination) == 0 {
panic("must have at least 1 destination")
}
n, err := p.owner.buffer.Write(frame)
if err != nil {
if err == ring.ErrDropped {
p.owner.config.Logger.Log(logger.Warning, pkg+"dropped frame", "frame size", len(frame))
return len(frame), nil
}
p.owner.config.Logger.Log(logger.Error, pkg+"unexpected ring buffer write error", "error", err.Error())
// Write implements the io.Writer interface. It will write to the underlying
// ring.Buffer and then flush to indicate a complete ring.Buffer write.
func (b *buffer) Write(d []byte) (int, error) {
r := (*ring.Buffer)(b)
n, err := r.Write(d)
r.Flush()
return n, err
}
p.owner.buffer.Flush()
return len(frame), nil
}
// New returns a pointer to a new Revid with the desired configuration, and/or
// an error if construction of the new instance was not successful.
func New(c Config, ns *netsender.Sender) (*Revid, error) {
r := Revid{ns: ns, err: make(chan error)}
r.packer.owner = &r
err := r.reset(c)
if err != nil {
return nil, err
@ -191,54 +167,74 @@ func (r *Revid) Bitrate() int {
return r.bitrate
}
// reset swaps the current config of a Revid with the passed
// configuration; checking validity and returning errors if not valid.
func (r *Revid) reset(config Config) error {
func (r *Revid) setConfig(config Config) error {
r.config.Logger = config.Logger
err := config.Validate(r)
if err != nil {
return errors.New("Config struct is bad: " + err.Error())
}
r.config = config
return nil
}
// NB: currently we use two outputs that require the same packetization method
// so we only need to check first output, but this may change later.
switch r.config.Outputs[0] {
case Rtmp, FfmpegRtmp:
r.buffer = ring.NewBuffer(flvRbSize, flvRbElementSize, writeTimeout)
case Http, Rtp:
r.buffer = ring.NewBuffer(mtsRbSize, mtsRbElementSize, writeTimeout)
}
func (r *Revid) setupPipeline(mtsEnc func(io.Writer, int) io.Writer, flvEnc func(io.Writer, int) (io.Writer, error)) error {
r.buffer = (*buffer)(ring.NewBuffer(ringBufferSize, ringBufferElementSize, writeTimeout))
r.destination = make([]loadSender, 0, len(r.config.Outputs))
for _, typ := range r.config.Outputs {
switch typ {
case File:
s, err := newFileSender(config.OutputPath)
if err != nil {
return err
}
r.destination = append(r.destination, s)
case Rtmp:
s, err := newRtmpSender(config.RtmpUrl, rtmpConnectionTimeout, rtmpConnectionMaxTries, r.config.Logger.Log)
if err != nil {
return err
}
r.destination = append(r.destination, s)
r.encoder = make([]io.Writer, 0)
// mtsSenders will hold the senders the require MPEGTS encoding, and flvSenders
// will hold senders that require FLV encoding.
var mtsSenders, flvSenders []loadSender
// We will go through our outputs and create the corresponding senders to add
// to mtsSenders if the output requires MPEGTS encoding, or flvSenders if the
// output requires FLV encoding.
var sender loadSender
for _, out := range r.config.Outputs {
switch out {
case Http:
switch r.Config().Packetization {
case Mpegts:
r.destination = append(r.destination, newMtsSender(newMinimalHttpSender(r.ns, r.config.Logger.Log), nil))
default:
r.destination = append(r.destination, newHttpSender(r.ns, r.config.Logger.Log))
}
sender = newMtsSender(newMinimalHttpSender(r.ns, r.config.Logger.Log), nil)
mtsSenders = append(mtsSenders, sender)
case Rtp:
s, err := newRtpSender(r.config.RtpAddress, r.config.Logger.Log, r.config.FrameRate)
sender, err := newRtpSender(r.config.RtpAddress, r.config.Logger.Log, r.config.FrameRate)
if err != nil {
r.config.Logger.Log(logger.Warning, pkg+"rtp connect error", "error", err.Error())
}
mtsSenders = append(mtsSenders, sender)
case File:
sender, err := newFileSender(r.config.OutputPath)
if err != nil {
return err
}
r.destination = append(r.destination, s)
mtsSenders = append(mtsSenders, sender)
case Rtmp:
sender, err := newRtmpSender(r.config.RtmpUrl, rtmpConnectionTimeout, rtmpConnectionMaxTries, r.config.Logger.Log)
if err != nil {
r.config.Logger.Log(logger.Warning, pkg+"rtmp connect error", "error", err.Error())
}
flvSenders = append(flvSenders, sender)
}
}
// If we have some senders that require MPEGTS encoding then add an MPEGTS
// encoder to revid's encoder slice, and give this encoder the mtsSenders
// as a destination.
if len(mtsSenders) != 0 {
ms := newMultiSender(mtsSenders, r.config.Logger.Log)
e := mtsEnc(ms, int(r.config.FrameRate))
r.encoder = append(r.encoder, e)
}
// If we have some senders that require FLV encoding then add an FLV
// encoder to revid's encoder slice, and give this encoder the flvSenders
// as a destination.
if len(flvSenders) != 0 {
ms := newMultiSender(flvSenders, r.config.Logger.Log)
e, err := flvEnc(ms, int(r.config.FrameRate))
if err != nil {
return err
}
r.encoder = append(r.encoder, e)
}
switch r.config.Input {
@ -249,6 +245,7 @@ func (r *Revid) reset(config Config) error {
case File:
r.setupInput = r.setupInputForFile
}
switch r.config.InputCodec {
case H264:
r.config.Logger.Log(logger.Info, pkg+"using H264 lexer")
@ -257,33 +254,33 @@ func (r *Revid) reset(config Config) error {
r.config.Logger.Log(logger.Info, pkg+"using MJPEG lexer")
r.lexTo = lex.MJPEG
}
return nil
}
switch r.config.Packetization {
case None:
// no packetisation - Revid output chan grabs raw data straight from parser
r.lexTo = func(dst stream.Encoder, src io.Reader, _ time.Duration) error {
for {
var b [4 << 10]byte
n, rerr := src.Read(b[:])
werr := dst.Encode(b[:n])
if rerr != nil {
return rerr
}
if werr != nil {
return werr
}
}
}
r.encoder = stream.NopEncoder(&r.packer)
case Mpegts:
r.config.Logger.Log(logger.Info, pkg+"using MPEGTS packetisation")
r.encoder = mts.NewEncoder(&r.packer, float64(r.config.FrameRate))
case Flv:
r.config.Logger.Log(logger.Info, pkg+"using FLV packetisation")
r.encoder, err = flv.NewEncoder(&r.packer, true, true, int(r.config.FrameRate))
func newMtsEncoder(dst io.Writer, fps int) io.Writer {
e := mts.NewEncoder(dst, float64(fps))
return e
}
func newFlvEncoder(dst io.Writer, fps int) (io.Writer, error) {
e, err := flv.NewEncoder(dst, true, true, fps)
if err != nil {
r.config.Logger.Log(logger.Fatal, pkg+"failed to open FLV encoder", err.Error())
return nil, err
}
return e, nil
}
// reset swaps the current config of a Revid with the passed
// configuration; checking validity and returning errors if not valid.
func (r *Revid) reset(config Config) error {
err := r.setConfig(config)
if err != nil {
return err
}
err = r.setupPipeline(newMtsEncoder, newFlvEncoder)
if err != nil {
return err
}
return nil
@ -386,8 +383,6 @@ func (r *Revid) Update(vars map[string]string) error {
r.config.Outputs[i] = Http
case "Rtmp":
r.config.Outputs[i] = Rtmp
case "FfmpegRtmp":
r.config.Outputs[i] = FfmpegRtmp
case "Rtp":
r.config.Outputs[i] = Rtp
default:
@ -396,23 +391,6 @@ func (r *Revid) Update(vars map[string]string) error {
}
}
case "Packetization":
switch value {
case "Mpegts":
r.config.Packetization = Mpegts
case "Flv":
r.config.Packetization = Flv
default:
r.config.Logger.Log(logger.Warning, pkg+"invalid packetization param", "value", value)
continue
}
case "FramesPerClip":
f, err := strconv.ParseUint(value, 10, 0)
if err != nil {
r.config.Logger.Log(logger.Warning, pkg+"invalid framesperclip param", "value", value)
break
}
r.config.FramesPerClip = uint(f)
case "RtmpUrl":
r.config.RtmpUrl = value
case "RtpAddress":
@ -513,7 +491,7 @@ func (r *Revid) outputClips() {
loop:
for r.IsRunning() {
// If the ring buffer has something we can read and send off
chunk, err := r.buffer.Next(readTimeout)
chunk, err := (*ring.Buffer)(r.buffer).Next(readTimeout)
switch err {
case nil:
// Do nothing.
@ -527,72 +505,30 @@ loop:
break loop
}
count += chunk.Len()
r.config.Logger.Log(logger.Debug, pkg+"about to send")
for i, dest := range r.destination {
err = dest.load(chunk)
// Loop over encoders and hand bytes over to each one.
for _, e := range r.encoder {
_, err := chunk.WriteTo(e)
if err != nil {
r.config.Logger.Log(logger.Error, pkg+"failed to load clip to output"+strconv.Itoa(i))
r.err <- err
}
}
for i, dest := range r.destination {
err = dest.send()
if err == nil {
r.config.Logger.Log(logger.Debug, pkg+"sent clip to output "+strconv.Itoa(i))
} else if !r.config.SendRetry {
r.config.Logger.Log(logger.Warning, pkg+"send to output "+strconv.Itoa(i)+" failed", "error", err.Error())
} else {
r.config.Logger.Log(logger.Error, pkg+"send to output "+strconv.Itoa(i)+
" failed, trying again", "error", err.Error())
err = dest.send()
if err != nil && chunk.Len() > 11 {
r.config.Logger.Log(logger.Error, pkg+"second send attempted failed, restarting connection", "error", err.Error())
for err != nil {
if rs, ok := dest.(restarter); ok {
r.config.Logger.Log(logger.Debug, pkg+"restarting session", "session", rs)
err = rs.restart()
if err != nil {
r.config.Logger.Log(logger.Error, pkg+"failed to restart rtmp session", "error", err.Error())
time.Sleep(sendFailedDelay)
continue
}
r.config.Logger.Log(logger.Info, pkg+"restarted rtmp session, sending again")
}
err = dest.send()
if err != nil {
r.config.Logger.Log(logger.Error, pkg+"send failed again, with error", "error", err.Error())
}
}
}
}
}
// Release the chunk back to the ring buffer.
chunk.Close()
// Release the chunk back to the ring buffer for use
for _, dest := range r.destination {
dest.release()
}
r.config.Logger.Log(logger.Debug, pkg+"done reading that clip from ring buffer")
// Log some information regarding bitrate and ring buffer size if it's time
// FIXME(saxon): this doesn't work anymore.
now := time.Now()
deltaTime := now.Sub(lastTime)
if deltaTime > bitrateTime {
// FIXME(kortschak): For subsecond deltaTime, this will give infinite bitrate.
r.bitrate = int(float64(count*8) / float64(deltaTime/time.Second))
r.config.Logger.Log(logger.Debug, pkg+"bitrate (bits/s)", "bitrate", r.bitrate)
r.config.Logger.Log(logger.Debug, pkg+"ring buffer size", "value", r.buffer.Len())
r.config.Logger.Log(logger.Debug, pkg+"ring buffer size", "value", (*ring.Buffer)(r.buffer).Len())
lastTime = now
count = 0
}
}
r.config.Logger.Log(logger.Info, pkg+"not outputting clips anymore")
for i, dest := range r.destination {
err := dest.close()
if err != nil {
r.config.Logger.Log(logger.Error, pkg+"failed to close output"+strconv.Itoa(i)+" destination", "error", err.Error())
}
}
}
// startRaspivid sets up things for input from raspivid i.e. starts
@ -719,7 +655,7 @@ func (r *Revid) setupInputForFile() error {
func (r *Revid) processFrom(read io.Reader, delay time.Duration) {
r.config.Logger.Log(logger.Info, pkg+"reading input data")
r.err <- r.lexTo(r.encoder, read, delay)
r.err <- r.lexTo(r.buffer, read, delay)
r.config.Logger.Log(logger.Info, pkg+"finished reading input data")
r.wg.Done()
}

231
revid/revid_test.go
View File

@ -1,7 +1,9 @@
package revid
import (
"errors"
"fmt"
"io"
"os"
"runtime"
"testing"
@ -66,3 +68,232 @@ func (tl *testLogger) Log(level int8, msg string, params ...interface{}) {
os.Exit(1)
}
}
// tstMtsEncoder emulates the mts.Encoder to the extent of the dst field.
// This will allow access to the dst to check that it has been set corrctly.
type tstMtsEncoder struct {
dst io.Writer
}
// newTstMtsEncoder returns a pointer to a newTsMtsEncoder.
func newTstMtsEncoder(dst io.Writer, fps int) io.Writer {
return &tstMtsEncoder{dst: dst}
}
func (e *tstMtsEncoder) Write(d []byte) (int, error) { return 0, nil }
// tstFlvEncoder emulates the flv.Encoder to the extent of the dst field.
// This will allow access to the dst to check that it has been set corrctly.
type tstFlvEncoder struct {
dst io.Writer
}
// newTstFlvEncoder returns a pointer to a new tstFlvEncoder.
func newTstFlvEncoder(dst io.Writer, fps int) (io.Writer, error) {
return &tstFlvEncoder{dst: dst}, nil
}
func (e *tstFlvEncoder) Write(d []byte) (int, error) { return 0, nil }
// TestResetEncoderSenderSetup checks that revid.reset() correctly sets up the
// revid.encoder slice and the senders the encoders write to.
func TestResetEncoderSenderSetup(t *testing.T) {
// We will use these to indicate types after assertion.
const (
mtsSenderStr = "revid.mtsSender"
rtpSenderStr = "revid.rtpSender"
rtmpSenderStr = "revid.RtmpSender"
mtsEncoderStr = "mts.Encoder"
flvEncoderStr = "flv.Encoder"
)
// Struct that will be used to format test cases nicely below.
type encoder struct {
encoderType string
destinations []string
}
tests := []struct {
outputs []uint8
encoders []encoder
}{
{
outputs: []uint8{Http},
encoders: []encoder{
{
encoderType: mtsEncoderStr,
destinations: []string{mtsSenderStr},
},
},
},
{
outputs: []uint8{Rtmp},
encoders: []encoder{
{
encoderType: flvEncoderStr,
destinations: []string{rtmpSenderStr},
},
},
},
{
outputs: []uint8{Rtp},
encoders: []encoder{
{
encoderType: mtsEncoderStr,
destinations: []string{rtpSenderStr},
},
},
},
{
outputs: []uint8{Http, Rtmp},
encoders: []encoder{
{
encoderType: mtsEncoderStr,
destinations: []string{mtsSenderStr},
},
{
encoderType: flvEncoderStr,
destinations: []string{rtmpSenderStr},
},
},
},
{
outputs: []uint8{Http, Rtp, Rtmp},
encoders: []encoder{
{
encoderType: mtsEncoderStr,
destinations: []string{mtsSenderStr, rtpSenderStr},
},
{
encoderType: flvEncoderStr,
destinations: []string{rtmpSenderStr},
},
},
},
{
outputs: []uint8{Rtp, Rtmp},
encoders: []encoder{
{
encoderType: mtsEncoderStr,
destinations: []string{rtpSenderStr},
},
{
encoderType: flvEncoderStr,
destinations: []string{rtmpSenderStr},
},
},
},
}
// typeOfEncoder will return the type of encoder implementing stream.Encoder.
typeOfEncoder := func(i io.Writer) (string, error) {
if _, ok := i.(*tstMtsEncoder); ok {
return mtsEncoderStr, nil
}
if _, ok := i.(*tstFlvEncoder); ok {
return flvEncoderStr, nil
}
return "", errors.New("unknown Encoder type")
}
// typeOfSender will return the type of sender implementing loadSender.
typeOfSender := func(s loadSender) (string, error) {
if _, ok := s.(*mtsSender); ok {
return mtsSenderStr, nil
}
if _, ok := s.(*rtpSender); ok {
return rtpSenderStr, nil
}
if _, ok := s.(*rtmpSender); ok {
return rtmpSenderStr, nil
}
return "", errors.New("unknown loadSender type")
}
rv, err := New(Config{Logger: &testLogger{}}, nil)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Go through our test cases.
for testNum, test := range tests {
// Create a new config and reset revid with it.
const dummyURL = "rtmp://dummy"
c := Config{Logger: &testLogger{}, Outputs: test.outputs, RtmpUrl: dummyURL}
err := rv.setConfig(c)
if err != nil {
t.Fatalf("unexpected error: %v for test %v", err, testNum)
}
// This logic is what we want to check.
err = rv.setupPipeline(newTstMtsEncoder, newTstFlvEncoder)
if err != nil {
t.Fatalf("unexpected error: %v for test %v", err, testNum)
}
// First check that we have the correct number of encoders.
got := len(rv.encoder)
want := len(test.encoders)
if got != want {
t.Errorf("incorrect number of encoders in revid for test: %v. \nGot: %v\nWant: %v\n", testNum, got, want)
}
// Now check the correctness of encoders and their destinations.
for _, e := range rv.encoder {
// Get e's type.
encoderType, err := typeOfEncoder(e)
if err != nil {
t.Fatalf("could not get encoders type for test %v, failed with err: %v", testNum, err)
}
// Check that we expect this encoder to be here.
idx := -1
for i, expect := range test.encoders {
if expect.encoderType == encoderType {
idx = i
}
}
if idx == -1 {
t.Fatalf("encoder %v isn't expected in test %v", encoderType, testNum)
}
// Now check that this encoder has correct number of destinations (senders).
var ms io.Writer
switch encoderType {
case mtsEncoderStr:
ms = e.(*tstMtsEncoder).dst
case flvEncoderStr:
ms = e.(*tstFlvEncoder).dst
}
senders := ms.(*multiSender).senders
got = len(senders)
want = len(test.encoders[idx].destinations)
if got != want {
t.Errorf("did not get expected number of senders in test %v. \nGot: %v\nWant: %v\n", testNum, got, want)
}
// Check that destinations are as expected.
for _, expectDst := range test.encoders[idx].destinations {
ok := false
for _, dst := range senders {
// Get type of sender.
senderType, err := typeOfSender(dst)
if err != nil {
t.Fatalf("could not get encoders type for test %v, failed with err: %v", testNum, err)
}
// If it's one we want, indicate.
if senderType == expectDst {
ok = true
}
}
// If not okay then we couldn't find expected sender.
if !ok {
t.Errorf("could not find expected destination %v, for test %v", expectDst, testNum)
}
}
}
}
}

128
revid/senders.go
View File

@ -29,6 +29,7 @@ LICENSE
package revid
import (
"errors"
"fmt"
"net"
"os"
@ -41,7 +42,6 @@ import (
"bitbucket.org/ausocean/av/protocol/rtp"
"bitbucket.org/ausocean/iot/pi/netsender"
"bitbucket.org/ausocean/utils/logger"
"bitbucket.org/ausocean/utils/ring"
)
// Sender is intended to provided functionality for the sending of a byte slice
@ -52,6 +52,40 @@ type Sender interface {
send(d []byte) error
}
// Log is used by the multiSender.
type Log func(level int8, message string, params ...interface{})
// multiSender implements io.Writer. It provides the capacity to send to multiple
// senders from a single Write call.
type multiSender struct {
senders []loadSender
log Log
}
// newMultiSender returns a pointer to a new multiSender.
func newMultiSender(senders []loadSender, log Log) *multiSender {
return &multiSender{
senders: senders,
log: log,
}
}
// Write implements io.Writer. This will call load (with the passed slice), send
// and release on all senders of multiSender.
func (s *multiSender) Write(d []byte) (int, error) {
for i, sender := range s.senders {
sender.load(d)
err := sender.send()
if err != nil {
s.log(logger.Warning, pkg+"send failed", "sender", i, "error", err)
}
}
for _, sender := range s.senders {
sender.release()
}
return len(d), nil
}
// minimalHttpSender implements Sender for posting HTTP to netreceiver or vidgrind.
type minimalHttpSender struct {
client *netsender.Sender
@ -78,7 +112,7 @@ type loadSender interface {
// load assigns the *ring.Chunk to the loadSender.
// The load call may fail, but must not mutate the
// the chunk.
load(*ring.Chunk) error
load(d []byte) error
// send performs a destination-specific send
// operation. It must not mutate the chunk.
@ -100,8 +134,7 @@ type restarter interface {
// fileSender implements loadSender for a local file destination.
type fileSender struct {
file *os.File
chunk *ring.Chunk
data []byte
}
func newFileSender(path string) (*fileSender, error) {
@ -112,26 +145,21 @@ func newFileSender(path string) (*fileSender, error) {
return &fileSender{file: f}, nil
}
func (s *fileSender) load(c *ring.Chunk) error {
s.chunk = c
func (s *fileSender) load(d []byte) error {
s.data = d
return nil
}
func (s *fileSender) send() error {
_, err := s.chunk.WriteTo(s.file)
_, err := s.file.Write(s.data)
return err
}
func (s *fileSender) release() {
s.chunk.Close()
s.chunk = nil
}
func (s *fileSender) release() {}
func (s *fileSender) close() error {
return s.file.Close()
}
func (s *fileSender) close() error { return s.file.Close() }
// mtsSender implemented loadSender and provides sending capability specifically
// mtsSender implements loadSender and provides sending capability specifically
// for use with MPEGTS packetization. It handles the construction of appropriately
// lengthed clips based on PSI. It also fixes accounts for discontinuities by
// setting the discontinuity indicator for the first packet of a clip.
@ -143,7 +171,6 @@ type mtsSender struct {
failed bool
discarded bool
repairer *mts.DiscontinuityRepairer
chunk *ring.Chunk
curPid int
}
@ -157,12 +184,12 @@ func newMtsSender(s Sender, log func(lvl int8, msg string, args ...interface{}))
// load takes a *ring.Chunk and assigns to s.next, also grabbing it's pid and
// assigning to s.curPid. s.next if exists is also appended to the sender buf.
func (s *mtsSender) load(c *ring.Chunk) error {
func (s *mtsSender) load(d []byte) error {
if s.next != nil {
s.buf = append(s.buf, s.next...)
}
s.chunk = c
bytes := s.chunk.Bytes()
bytes := make([]byte, len(d))
copy(bytes, d)
s.next = bytes
copy(s.pkt[:], bytes)
s.curPid = s.pkt.PID()
@ -207,8 +234,6 @@ func (s *mtsSender) release() {
s.buf = s.buf[:0]
s.failed = false
}
s.chunk.Close()
s.chunk = nil
}
// httpSender implements loadSender for posting HTTP to NetReceiver
@ -217,7 +242,7 @@ type httpSender struct {
log func(lvl int8, msg string, args ...interface{})
chunk *ring.Chunk
data []byte
}
func newHttpSender(ns *netsender.Sender, log func(lvl int8, msg string, args ...interface{})) *httpSender {
@ -227,19 +252,13 @@ func newHttpSender(ns *netsender.Sender, log func(lvl int8, msg string, args ...
}
}
func (s *httpSender) load(c *ring.Chunk) error {
s.chunk = c
func (s *httpSender) load(d []byte) error {
s.data = d
return nil
}
func (s *httpSender) send() error {
if s.chunk == nil {
// Do not retry with httpSender,
// so just return without error
// if the chunk has been cleared.
return nil
}
return httpSend(s.chunk.Bytes(), s.client, s.log)
return httpSend(s.data, s.client, s.log)
}
func httpSend(d []byte, client *netsender.Sender, log func(lvl int8, msg string, args ...interface{})) error {
@ -297,12 +316,7 @@ func extractMeta(r string, log func(lvl int8, msg string, args ...interface{}))
return nil
}
func (s *httpSender) release() {
// We will not retry, so release
// the chunk and clear it now.
s.chunk.Close()
s.chunk = nil
}
func (s *httpSender) release() {}
func (s *httpSender) close() error { return nil }
@ -315,7 +329,7 @@ type rtmpSender struct {
retries int
log func(lvl int8, msg string, args ...interface{})
chunk *ring.Chunk
data []byte
}
var _ restarter = (*rtmpSender)(nil)
@ -333,10 +347,6 @@ func newRtmpSender(url string, timeout uint, retries int, log func(lvl int8, msg
log(logger.Info, pkg+"retry rtmp connection")
}
}
if err != nil {
return nil, err
}
s := &rtmpSender{
conn: conn,
url: url,
@ -344,26 +354,26 @@ func newRtmpSender(url string, timeout uint, retries int, log func(lvl int8, msg
retries: retries,
log: log,
}
return s, nil
return s, err
}
func (s *rtmpSender) load(c *ring.Chunk) error {
s.chunk = c
func (s *rtmpSender) load(d []byte) error {
s.data = d
return nil
}
func (s *rtmpSender) send() error {
_, err := s.chunk.WriteTo(s.conn)
if err == rtmp.ErrInvalidFlvTag {
return nil
if s.conn == nil {
return errors.New("no rtmp connection, cannot write")
}
_, err := s.conn.Write(s.data)
if err != nil {
err = s.restart()
}
return err
}
func (s *rtmpSender) release() {
s.chunk.Close()
s.chunk = nil
}
func (s *rtmpSender) release() {}
func (s *rtmpSender) restart() error {
s.close()
@ -393,7 +403,7 @@ func (s *rtmpSender) close() error {
type rtpSender struct {
log func(lvl int8, msg string, args ...interface{})
encoder *rtp.Encoder
chunk *ring.Chunk
data []byte
}
func newRtpSender(addr string, log func(lvl int8, msg string, args ...interface{}), fps uint) (*rtpSender, error) {
@ -408,19 +418,17 @@ func newRtpSender(addr string, log func(lvl int8, msg string, args ...interface{
return s, nil
}
func (s *rtpSender) load(c *ring.Chunk) error {
s.chunk = c
func (s *rtpSender) load(d []byte) error {
s.data = make([]byte, len(d))
copy(s.data, d)
return nil
}
func (s *rtpSender) close() error { return nil }
func (s *rtpSender) release() {
s.chunk.Close()
s.chunk = nil
}
func (s *rtpSender) release() {}
func (s *rtpSender) send() error {
_, err := s.chunk.WriteTo(s.encoder)
_, err := s.encoder.Write(s.data)
return err
}

120
revid/senders_test.go
View File

@ -31,6 +31,7 @@ package revid
import (
"errors"
"fmt"
"sync"
"testing"
"time"
@ -51,6 +52,10 @@ const (
rTimeout = 10 * time.Millisecond
)
var (
errSendFailed = errors.New("send failed")
)
// sender simulates sending of video data, creating discontinuities if
// testDiscontinuities is set to true.
type sender struct {
@ -65,7 +70,7 @@ type sender struct {
func (ts *sender) send(d []byte) error {
if ts.testDiscontinuities && ts.currentPkt == ts.discontinuityAt {
ts.currentPkt++
return errors.New("could not send")
return errSendFailed
}
cpy := make([]byte, len(d))
copy(cpy, d)
@ -97,21 +102,9 @@ func log(lvl int8, msg string, args ...interface{}) {
fmt.Printf(msg, args)
}
// buffer implements io.Writer and handles the writing of data to a
// ring buffer used in tests.
type buffer ring.Buffer
// Write implements the io.Writer interface.
func (b *buffer) Write(d []byte) (int, error) {
r := (*ring.Buffer)(b)
n, err := r.Write(d)
r.Flush()
return n, err
}
// TestSegment ensures that the mtsSender correctly segments data into clips
// based on positioning of PSI in the mtsEncoder's output stream.
func TestSegment(t *testing.T) {
func TestMtsSenderSegment(t *testing.T) {
mts.Meta = meta.New()
// Create ringBuffer, sender, loadsender and the MPEGTS encoder.
@ -128,7 +121,7 @@ func TestSegment(t *testing.T) {
for i := 0; i < noOfPacketsToWrite; i++ {
// Insert a payload so that we check that the segmentation works correctly
// in this regard. Packet number will be used.
encoder.Encode([]byte{byte(i)})
encoder.Write([]byte{byte(i)})
rb.Flush()
for {
@ -137,7 +130,7 @@ func TestSegment(t *testing.T) {
break
}
err = loadSender.load(next)
err = loadSender.load(next.Bytes())
if err != nil {
t.Fatalf("Unexpected err: %v\n", err)
}
@ -147,6 +140,8 @@ func TestSegment(t *testing.T) {
t.Fatalf("Unexpected err: %v\n", err)
}
loadSender.release()
next.Close()
next = nil
}
}
@ -198,7 +193,7 @@ func TestSegment(t *testing.T) {
}
}
func TestSendFailDiscontinuity(t *testing.T) {
func TestMtsSenderDiscontinuity(t *testing.T) {
mts.Meta = meta.New()
// Create ringBuffer sender, loadSender and the MPEGTS encoder.
@ -215,7 +210,7 @@ func TestSendFailDiscontinuity(t *testing.T) {
const noOfPacketsToWrite = 100
for i := 0; i < noOfPacketsToWrite; i++ {
// Our payload will just be packet number.
encoder.Encode([]byte{byte(i)})
encoder.Write([]byte{byte(i)})
rb.Flush()
for {
@ -224,13 +219,15 @@ func TestSendFailDiscontinuity(t *testing.T) {
break
}
err = loadSender.load(next)
err = loadSender.load(next.Bytes())
if err != nil {
t.Fatalf("Unexpected err: %v\n", err)
}
loadSender.send()
loadSender.release()
next.Close()
next = nil
}
}
@ -256,5 +253,88 @@ func TestSendFailDiscontinuity(t *testing.T) {
if !discon {
t.Fatalf("Did not get discontinuity indicator for PAT")
}
}
// dummyLoadSender is a loadSender implementation that allows us to simulate
// the behaviour of a loadSender and check that it performas as expected.
type dummyLoadSender struct {
data []byte
buf [][]byte
failOnSend bool
failHandled bool
retry bool
mu sync.Mutex
}
// newDummyLoadSender returns a pointer to a new dummyLoadSender.
func newDummyLoadSender(fail bool, retry bool) *dummyLoadSender {
return &dummyLoadSender{failOnSend: fail, failHandled: true, retry: retry}
}
// load takes a byte slice and assigns it to the dummyLoadSenders data slice.
func (s *dummyLoadSender) load(d []byte) error {
s.data = d
return nil
}
// send will append to dummyLoadSender's buf slice, only if failOnSend is false.
// If failOnSend is set to true, we expect that data sent won't be written to
// the buf simulating a failed send.
func (s *dummyLoadSender) send() error {
if !s.getFailOnSend() {
s.buf = append(s.buf, s.data)
return nil
}
s.failHandled = false
return errSendFailed
}
func (s *dummyLoadSender) getFailOnSend() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.failOnSend
}
// release sets dummyLoadSender's data slice to nil. data can be checked to see
// if release has been called at the right time.
func (s *dummyLoadSender) release() {
s.data = nil
}
func (s *dummyLoadSender) close() error { return nil }
// handleSendFail simply sets the failHandled flag to true. This can be checked
// to see if handleSendFail has been called by the multiSender at the right time.
func (s *dummyLoadSender) handleSendFail(err error) error {
s.failHandled = true
return nil
}
func (s *dummyLoadSender) retrySend() bool { return s.retry }
// TestMultiSenderWrite checks that we can do basic writing to multiple senders
// using the multiSender.
func TestMultiSenderWrite(t *testing.T) {
senders := []loadSender{
newDummyLoadSender(false, false),
newDummyLoadSender(false, false),
newDummyLoadSender(false, false),
}
ms := newMultiSender(senders, log)
// Perform some multiSender writes.
const noOfWrites = 5
for i := byte(0); i < noOfWrites; i++ {
ms.Write([]byte{i})
}
// Check that the senders got the data correctly from the writes.
for i := byte(0); i < noOfWrites; i++ {
for j, dest := range ms.senders {
got := dest.(*dummyLoadSender).buf[i][0]
if got != i {
t.Errorf("Did not get expected result for sender: %v. \nGot: %v\nWant: %v\n", j, got, i)
}
}
}
}