ml
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package voc
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import (
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"bytes"
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"encoding/binary"
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"io"
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)
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// Save encodes the provided samples into the given writer.
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func Save(writer io.Writer, sampleRate float32, samples []byte) error {
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err := writeHeader(writer)
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if err != nil {
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return err
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}
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err = writeBasicSoundData(writer, sampleRate, samples)
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if err != nil {
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return err
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}
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err = writeEndOfFile(writer)
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return err
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}
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func writeHeader(writer io.Writer) error {
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version := baseVersion
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_, err := writer.Write(bytes.NewBufferString(FileHeader).Bytes())
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if err != nil {
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return err
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}
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err = binary.Write(writer, binary.LittleEndian, standardHeaderSize)
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if err != nil {
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return err
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}
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err = binary.Write(writer, binary.LittleEndian, baseVersion)
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if err != nil {
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return err
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}
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return binary.Write(writer, binary.LittleEndian, (^version)+versionCheckValue)
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}
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func writeBlockHeader(writer io.Writer, block blockType, dataBytes int) error {
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_, err := writer.Write([]byte{byte(block), byte(dataBytes), byte(dataBytes >> 8), byte(dataBytes >> 16)})
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return err
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}
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func writeBasicSoundData(writer io.Writer, sampleRate float32, samples []byte) error {
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sampleType := byte(0)
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err := writeBlockHeader(writer, soundData, len(samples)+2)
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if err != nil {
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return err
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}
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_, err = writer.Write([]byte{sampleRateToDivisor(sampleRate), sampleType})
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if err != nil {
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return err
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}
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_, err = writer.Write(samples)
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return err
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}
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func writeEndOfFile(writer io.Writer) error {
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_, err := writer.Write([]byte{byte(terminator)})
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return err
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}
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