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reuse interleaved frame buffer to minimize ram and cpu

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aler9
2020-06-27 16:06:16 +02:00
parent 5f06349c87
commit 6bbbfefb75
3 changed files with 21 additions and 21 deletions
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26
interleaved-frame.go
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@@ -8,9 +8,7 @@ import (
)
const (
_INTERLEAVED_FRAME_MAGIC = 0x24
_INTERLEAVED_FRAME_MAX_SIZE = 512 * 1024
_INTERLEAVED_FRAME_MAX_CONTENT_SIZE = (_INTERLEAVED_FRAME_MAX_SIZE - 4)
_INTERLEAVED_FRAME_MAGIC = 0x24
)
// InterleavedFrame is a structure that allows to send and receive binary data
@@ -21,34 +19,32 @@ type InterleavedFrame struct {
Content []byte
}
func interleavedFrameRead(r io.Reader) (*InterleavedFrame, error) {
func (f *InterleavedFrame) read(r io.Reader) error {
var header [4]byte
_, err := io.ReadFull(r, header[:])
if err != nil {
return nil, err
return err
}
if header[0] != _INTERLEAVED_FRAME_MAGIC {
return nil, fmt.Errorf("wrong magic byte (0x%.2x)", header[0])
return fmt.Errorf("wrong magic byte (0x%.2x)", header[0])
}
framelen := int(binary.BigEndian.Uint16(header[2:]))
if framelen > _INTERLEAVED_FRAME_MAX_SIZE {
return nil, fmt.Errorf("frame length greater than maximum allowed (%d vs %d)",
framelen, _INTERLEAVED_FRAME_MAX_SIZE)
if framelen > len(f.Content) {
return fmt.Errorf("frame length greater than maximum allowed (%d vs %d)",
framelen, len(f.Content))
}
f := &InterleavedFrame{
Channel: header[1],
Content: make([]byte, framelen),
}
f.Channel = header[1]
f.Content = f.Content[:framelen]
_, err = io.ReadFull(r, f.Content)
if err != nil {
return nil, err
return err
}
return f, nil
return nil
}
func (f *InterleavedFrame) write(bw *bufio.Writer) error {