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48 lines
930 B
Go
48 lines
930 B
Go
package testdata
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import (
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"encoding/binary"
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"fmt"
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"io"
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"os"
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)
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const Nico = "testdata/nico.dca"
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// WriteOpus reads the given file containing the Opus frames into the give
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// io.Writer.
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func WriteOpus(w io.Writer, file string) error {
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f, err := os.Open(file)
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if err != nil {
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return fmt.Errorf("failed to open %s: %w", file, err)
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}
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defer f.Close()
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var lenbuf [4]byte
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for {
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_, err := io.ReadFull(f, lenbuf[:])
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if err != nil {
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if err == io.EOF {
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return nil
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}
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return fmt.Errorf("failed to read %s: %w", file, err)
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}
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// Read the integer
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framelen := int64(binary.LittleEndian.Uint32(lenbuf[:]))
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// Copy the frame.
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_, err = io.CopyN(w, f, framelen)
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if err != nil && err != io.EOF {
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return fmt.Errorf("failed to write: %w", err)
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}
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}
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}
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// WriterFunc wraps f to be an io.Writer.
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type WriterFunc func([]byte) (int, error)
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func (w WriterFunc) Write(b []byte) (int, error) {
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return w(b)
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}
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