mirror of https://bitbucket.org/ausocean/av.git
lex: add missing lex package
This commit is contained in:
Dan Kortschak
parent
ea33007173
commit
562ae8d3f3
|
|
@ -0,0 +1,248 @@
|
|||
/*
|
||||
NAME
|
||||
lex.go
|
||||
|
||||
DESCRIPTION
|
||||
See Readme.md
|
||||
|
||||
AUTHOR
|
||||
Dan Kortschak <dan@ausocean.org>
|
||||
|
||||
LICENSE
|
||||
lex.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 lex provides lexers for video encodings.
|
||||
package lex
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"time"
|
||||
|
||||
"bitbucket.org/ausocean/av/stream"
|
||||
)
|
||||
|
||||
var noDelay = make(chan time.Time)
|
||||
|
||||
func init() {
|
||||
close(noDelay)
|
||||
}
|
||||
|
||||
var h264Prefix = [...]byte{0x00, 0x00, 0x01, 0x09, 0xf0}
|
||||
|
||||
// H264 lexes H.264 NAL units read from src into separate writes to dst with
|
||||
// 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 {
|
||||
var tick <-chan time.Time
|
||||
if delay == 0 {
|
||||
tick = noDelay
|
||||
} else {
|
||||
ticker := time.NewTicker(delay)
|
||||
defer ticker.Stop()
|
||||
tick = ticker.C
|
||||
}
|
||||
|
||||
const bufSize = 8 << 10
|
||||
|
||||
c := newScanner(src, make([]byte, 4<<10)) // Standard file buffer size.
|
||||
|
||||
buf := make([]byte, len(h264Prefix), bufSize)
|
||||
copy(buf, h264Prefix[:])
|
||||
writeOut := false
|
||||
outer:
|
||||
for {
|
||||
var b byte
|
||||
var err error
|
||||
buf, b, err = c.scanUntilZeroInto(buf)
|
||||
if err != nil {
|
||||
if err != io.EOF {
|
||||
return err
|
||||
}
|
||||
break
|
||||
}
|
||||
|
||||
for n := 1; b == 0x0 && n < 4; n++ {
|
||||
b, err = c.readByte()
|
||||
if err != nil {
|
||||
if err != io.EOF {
|
||||
return err
|
||||
}
|
||||
break outer
|
||||
}
|
||||
buf = append(buf, b)
|
||||
|
||||
if b != 0x1 || (n != 2 && n != 3) {
|
||||
continue
|
||||
}
|
||||
|
||||
if writeOut {
|
||||
<-tick
|
||||
err := dst.Encode(buf[:len(buf)-(n+1)])
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
buf = make([]byte, len(h264Prefix)+n, bufSize)
|
||||
copy(buf, h264Prefix[:])
|
||||
buf = append(buf, 1)
|
||||
writeOut = false
|
||||
}
|
||||
|
||||
b, err = c.readByte()
|
||||
if err != nil {
|
||||
if err != io.EOF {
|
||||
return err
|
||||
}
|
||||
break outer
|
||||
}
|
||||
buf = append(buf, b)
|
||||
|
||||
// http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-H.264-200305-S!!PDF-E&type=items
|
||||
// Table 7-1 NAL unit type codes
|
||||
const (
|
||||
nonIdrPic = 1
|
||||
idrPic = 5
|
||||
paramSet = 8
|
||||
)
|
||||
switch nalTyp := b & 0x1f; nalTyp {
|
||||
case nonIdrPic, idrPic, paramSet:
|
||||
writeOut = true
|
||||
}
|
||||
}
|
||||
}
|
||||
if len(buf) == len(h264Prefix) {
|
||||
return nil
|
||||
}
|
||||
<-tick
|
||||
err := dst.Encode(buf)
|
||||
return err
|
||||
}
|
||||
|
||||
// scanner is a byte scanner.
|
||||
type scanner struct {
|
||||
buf []byte
|
||||
off int
|
||||
|
||||
// r is the source of data for the scanner.
|
||||
r io.Reader
|
||||
}
|
||||
|
||||
// newScanner returns a scanner initialised with an io.Reader and a read buffer.
|
||||
func newScanner(r io.Reader, buf []byte) *scanner {
|
||||
return &scanner{r: r, buf: buf[:0]}
|
||||
}
|
||||
|
||||
// scanUntilZeroInto scans the scanner's underlying io.Reader until a zero byte
|
||||
// has been read, appending all read bytes to dst. The resulting appended data,
|
||||
// the last read byte and whether the last read byte was zero are returned.
|
||||
func (c *scanner) scanUntilZeroInto(dst []byte) (res []byte, b byte, err error) {
|
||||
outer:
|
||||
for {
|
||||
var i int
|
||||
for i, b = range c.buf[c.off:] {
|
||||
if b != 0x0 {
|
||||
continue
|
||||
}
|
||||
dst = append(dst, c.buf[c.off:c.off+i+1]...)
|
||||
c.off += i + 1
|
||||
break outer
|
||||
}
|
||||
dst = append(dst, c.buf[c.off:]...)
|
||||
err = c.reload()
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
}
|
||||
return dst, b, err
|
||||
}
|
||||
|
||||
// readByte is an unexported ReadByte.
|
||||
func (c *scanner) readByte() (byte, error) {
|
||||
if c.off >= len(c.buf) {
|
||||
err := c.reload()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
}
|
||||
b := c.buf[c.off]
|
||||
c.off++
|
||||
return b, nil
|
||||
}
|
||||
|
||||
// reload re-fills the scanner's buffer.
|
||||
func (c *scanner) reload() error {
|
||||
n, err := c.r.Read(c.buf[:cap(c.buf)])
|
||||
c.buf = c.buf[:n]
|
||||
if err != nil {
|
||||
if err != io.EOF {
|
||||
return err
|
||||
}
|
||||
if n == 0 {
|
||||
return io.EOF
|
||||
}
|
||||
}
|
||||
c.off = 0
|
||||
return nil
|
||||
}
|
||||
|
||||
// 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 {
|
||||
var tick <-chan time.Time
|
||||
if delay == 0 {
|
||||
tick = noDelay
|
||||
} else {
|
||||
ticker := time.NewTicker(delay)
|
||||
defer ticker.Stop()
|
||||
tick = ticker.C
|
||||
}
|
||||
|
||||
r := bufio.NewReader(src)
|
||||
for {
|
||||
buf := make([]byte, 2, 4<<10)
|
||||
n, err := r.Read(buf)
|
||||
if n < 2 {
|
||||
return nil
|
||||
}
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !bytes.Equal(buf, []byte{0xff, 0xd8}) {
|
||||
return fmt.Errorf("parser: not MJPEG frame start: %#v", buf)
|
||||
}
|
||||
var last byte
|
||||
for {
|
||||
b, err := r.ReadByte()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
buf = append(buf, b)
|
||||
if last == 0xff && b == 0xd9 {
|
||||
break
|
||||
}
|
||||
last = b
|
||||
}
|
||||
<-tick
|
||||
err = dst.Encode(buf)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,346 @@
|
|||
/*
|
||||
NAME
|
||||
lex_test.go
|
||||
|
||||
DESCRIPTION
|
||||
See Readme.md
|
||||
|
||||
AUTHOR
|
||||
Dan Kortschak <dan@ausocean.org>
|
||||
|
||||
LICENSE
|
||||
lex_test.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 lex
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
var h264Tests = []struct {
|
||||
name string
|
||||
input []byte
|
||||
delay time.Duration
|
||||
want [][]byte
|
||||
err error
|
||||
}{
|
||||
{
|
||||
name: "empty",
|
||||
},
|
||||
{
|
||||
name: "null short",
|
||||
input: []byte{0x00, 0x00, 0x01, 0x0},
|
||||
delay: 0,
|
||||
want: [][]byte{{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x0}},
|
||||
},
|
||||
{
|
||||
name: "null short delayed",
|
||||
input: []byte{0x00, 0x00, 0x01, 0x0},
|
||||
delay: time.Millisecond,
|
||||
want: [][]byte{{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x0}},
|
||||
},
|
||||
{
|
||||
name: "full short type 1",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full short type 5",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x45, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x45, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full short type 8",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x48, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x48, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full short delayed",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: time.Millisecond,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full long type 1",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full long type 5",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x45, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x45, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full long type 8",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x48, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x48, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full long delayed",
|
||||
input: []byte{
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd',
|
||||
},
|
||||
delay: time.Millisecond,
|
||||
want: [][]byte{
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'u', 'l', 'l',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 'f', 'r', 'a', 'm', 'e',
|
||||
0x00, 0x00, 0x00, 0x01, 0x41, 'w', 'i', 't', 'h'},
|
||||
{0x0, 0x0, 0x1, 0x9, 0xf0, 0x00, 0x00, 0x00, 0x01, 0x00, 'l', 'e', 'n', 'g', 't', 'h',
|
||||
0x00, 0x00, 0x00, 0x01, 0x00, 's', 'p', 'r', 'e', 'a', 'd'},
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
func TestH264(t *testing.T) {
|
||||
for _, test := range h264Tests {
|
||||
var buf chunkEncoder
|
||||
err := H264(&buf, bytes.NewReader(test.input), test.delay)
|
||||
if fmt.Sprint(err) != fmt.Sprint(test.err) {
|
||||
t.Errorf("unexpected error for %q: got:%v want:%v", test.name, err, test.err)
|
||||
}
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
got := [][]byte(buf)
|
||||
if !reflect.DeepEqual(got, test.want) {
|
||||
t.Errorf("unexpected result for %q:\ngot :%#v\nwant:%#v", test.name, got, test.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var mjpegTests = []struct {
|
||||
name string
|
||||
input []byte
|
||||
delay time.Duration
|
||||
want [][]byte
|
||||
err error
|
||||
}{
|
||||
{
|
||||
name: "empty",
|
||||
},
|
||||
{
|
||||
name: "null",
|
||||
input: []byte{0xff, 0xd8, 0xff, 0xd9},
|
||||
delay: 0,
|
||||
want: [][]byte{{0xff, 0xd8, 0xff, 0xd9}},
|
||||
},
|
||||
{
|
||||
name: "null delayed",
|
||||
input: []byte{0xff, 0xd8, 0xff, 0xd9},
|
||||
delay: time.Millisecond,
|
||||
want: [][]byte{{0xff, 0xd8, 0xff, 0xd9}},
|
||||
},
|
||||
{
|
||||
name: "full",
|
||||
input: []byte{
|
||||
0xff, 0xd8, 'f', 'u', 'l', 'l', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'f', 'r', 'a', 'm', 'e', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'w', 'i', 't', 'h', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'l', 'e', 'n', 'g', 't', 'h', 0xff, 0xd9,
|
||||
0xff, 0xd8, 's', 'p', 'r', 'e', 'a', 'd', 0xff, 0xd9,
|
||||
},
|
||||
delay: 0,
|
||||
want: [][]byte{
|
||||
{0xff, 0xd8, 'f', 'u', 'l', 'l', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'f', 'r', 'a', 'm', 'e', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'w', 'i', 't', 'h', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'l', 'e', 'n', 'g', 't', 'h', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 's', 'p', 'r', 'e', 'a', 'd', 0xff, 0xd9},
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "full delayed",
|
||||
input: []byte{
|
||||
0xff, 0xd8, 'f', 'u', 'l', 'l', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'f', 'r', 'a', 'm', 'e', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'w', 'i', 't', 'h', 0xff, 0xd9,
|
||||
0xff, 0xd8, 'l', 'e', 'n', 'g', 't', 'h', 0xff, 0xd9,
|
||||
0xff, 0xd8, 's', 'p', 'r', 'e', 'a', 'd', 0xff, 0xd9,
|
||||
},
|
||||
delay: time.Millisecond,
|
||||
want: [][]byte{
|
||||
{0xff, 0xd8, 'f', 'u', 'l', 'l', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'f', 'r', 'a', 'm', 'e', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'w', 'i', 't', 'h', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 'l', 'e', 'n', 'g', 't', 'h', 0xff, 0xd9},
|
||||
{0xff, 0xd8, 's', 'p', 'r', 'e', 'a', 'd', 0xff, 0xd9},
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
func TestMJEG(t *testing.T) {
|
||||
for _, test := range mjpegTests {
|
||||
var buf chunkEncoder
|
||||
err := MJPEG(&buf, bytes.NewReader(test.input), test.delay)
|
||||
if fmt.Sprint(err) != fmt.Sprint(test.err) {
|
||||
t.Errorf("unexpected error for %q: got:%v want:%v", test.name, err, test.err)
|
||||
}
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
got := [][]byte(buf)
|
||||
if !reflect.DeepEqual(got, test.want) {
|
||||
t.Errorf("unexpected result for %q:\ngot :%#v\nwant:%#v", test.name, got, test.want)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
type chunkEncoder [][]byte
|
||||
|
||||
func (e *chunkEncoder) Encode(b []byte) error {
|
||||
*e = append(*e, b)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (*chunkEncoder) Stream() <-chan []byte { panic("INVALID USE") }
|
||||
|
||||
func TestScannerReadByte(t *testing.T) {
|
||||
data := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.")
|
||||
|
||||
for _, size := range []int{1, 2, 8, 1 << 10} {
|
||||
r := newScanner(bytes.NewReader(data), make([]byte, size))
|
||||
var got []byte
|
||||
for {
|
||||
b, err := r.readByte()
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
got = append(got, b)
|
||||
}
|
||||
if !bytes.Equal(got, data) {
|
||||
t.Errorf("unexpected result for buffer size %d:\ngot :%q\nwant:%q", size, got, data)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestScannerScanUntilZero(t *testing.T) {
|
||||
data := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit,\x00 sed do eiusmod tempor incididunt ut \x00labore et dolore magna aliqua.")
|
||||
|
||||
for _, size := range []int{1, 2, 8, 1 << 10} {
|
||||
r := newScanner(bytes.NewReader(data), make([]byte, size))
|
||||
var got [][]byte
|
||||
for {
|
||||
buf, _, err := r.scanUntilZeroInto(nil)
|
||||
got = append(got, buf)
|
||||
if err != nil {
|
||||
break
|
||||
}
|
||||
}
|
||||
want := bytes.SplitAfter(data, []byte{0})
|
||||
if !reflect.DeepEqual(got, want) {
|
||||
t.Errorf("unexpected result for buffer zie %d:\ngot :%q\nwant:%q", size, got, want)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue