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105 lines
1.8 KiB
Go
105 lines
1.8 KiB
Go
package ffmpeg
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import (
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"fmt"
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"git.gammaspectra.live/S.O.N.G/Ignite/decoder/y4m"
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"git.gammaspectra.live/S.O.N.G/Ignite/frame"
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"git.gammaspectra.live/S.O.N.G/Ignite/utilities"
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"io"
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"os"
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"os/exec"
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"strconv"
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)
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type Decoder struct {
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cmd *exec.Cmd
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y4m *y4m.Decoder
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}
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func NewDecoder(r io.Reader, settings map[string]any) (d *Decoder, err error) {
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videoIndex, err := strconv.ParseUint(utilities.GetSettingString(settings, "input-video-index", "0"), 10, 0)
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if err != nil {
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return nil, err
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}
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ffmpegBinary := "ffmpeg"
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if p := os.Getenv("FFMPEG_PATH"); p != "" {
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ffmpegBinary = p
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}
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cmd := exec.Command(ffmpegBinary,
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//"-v", "quiet",
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"-probesize", "8192",
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"-strict", "experimental",
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"-i", "pipe:",
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"-map_metadata", "-1",
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"-map", fmt.Sprintf("0:v:%d", videoIndex),
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"-f", "yuv4mpegpipe",
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"-strict", "experimental",
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"pipe:",
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)
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cmdIn, err := cmd.StdinPipe()
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if err != nil {
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return nil, err
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}
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cmdOut, err := cmd.StdoutPipe()
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if err != nil {
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return nil, err
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}
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cmd.Stderr = os.Stderr
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err = cmd.Start()
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if err != nil {
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defer cmd.Process.Release()
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return nil, err
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}
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d = &Decoder{
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cmd: cmd,
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}
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go func() {
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defer cmdIn.Close()
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_, _ = io.Copy(cmdIn, r)
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}()
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d.y4m, err = y4m.NewDecoder(cmdOut, settings)
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if err != nil {
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defer d.Close()
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return nil, err
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}
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return d, nil
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}
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func (d *Decoder) Decode() (frame.Frame, error) {
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return d.y4m.Decode()
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}
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func (d *Decoder) DecodeStream() *frame.Stream {
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return d.y4m.DecodeStream()
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}
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func (d *Decoder) Properties() frame.StreamProperties {
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return d.y4m.Properties()
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}
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func (d *Decoder) Version() string {
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return d.y4m.Version()
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}
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func (d *Decoder) Close() {
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if d.y4m != nil {
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d.y4m.Close()
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d.y4m = nil
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}
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if d.cmd != nil {
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d.cmd.Process.Kill()
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d.cmd.Process.Release()
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d.cmd = nil
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}
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}
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