87 lines
1.5 KiB
Go
87 lines
1.5 KiB
Go
package webm
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import (
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"archive/zip"
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"context"
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"errors"
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"fmt"
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"io"
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ffmpeg_go "github.com/u2takey/ffmpeg-go"
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"github.com/yazmeyaa/telegram_sticker_converter/internal/converter"
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)
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type webmService struct{}
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func NewService() *webmService {
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return &webmService{}
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}
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func (ws webmService) Transform(ctx context.Context, in io.Reader, out io.Writer, opts converter.WEBMTransformOptions) error {
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rIn, wIn := io.Pipe()
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rOut, wOut := io.Pipe()
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go func() {
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defer wIn.Close()
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_, _ = io.Copy(wIn, in)
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}()
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preset, err := buildPreset(opts)
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if err != nil {
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return err
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}
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stream := ffmpeg_go.
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Input("pipe:0", ffmpeg_go.KwArgs{
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"f": "webm",
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}).
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Silent(true).
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Output("pipe:1", preset).
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WithInput(rIn).
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WithOutput(wOut)
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if (opts.Frame == converter.FrameAll || opts.Frame == converter.FrameRange) &&
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(opts.Format == converter.FormatWEBP || opts.Format == converter.FormatJPEG || opts.Format == converter.FormatPNG) {
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go func() {
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defer wOut.Close()
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_ = stream.Run()
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}()
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zw := zip.NewWriter(out)
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defer zw.Close()
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frameIdx := 0
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scanner := newScanner(rOut, opts)
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for {
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frame, err := scanner.Next()
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if errors.Is(err, io.EOF) {
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break
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}
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if err != nil {
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return err
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}
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f, err := zw.Create(fmt.Sprintf("frame_%d.%s", frameIdx, string(opts.Format)))
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if err != nil {
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return err
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}
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if _, err := f.Write(frame); err != nil {
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return err
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}
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frameIdx++
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}
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return nil
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}
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defer wOut.Close()
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if err := stream.WithOutput(out).Run(); err != nil {
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return err
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}
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return nil
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}
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