Maksim Totmin
4c34f0bedc
Streams H.264 to the Galahad II LCD via USB (gousb) with: - ffmpeg CLI transcoding (no fragile FFmpeg C-ABI bindings) - pure-Go Annex-B access-unit splitting - framerate pacing with graceful shutdown and USB reconnect - TOML config, cobra CLI, structured slog logging, unit tests
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package cli
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/spf13/cobra"
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"galahad2lcd/internal/config"
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)
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// applyOverrides merges explicitly provided flags into cfg. Zero-valued
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// flags are ignored unless the user actually changed them.
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func applyOverrides(cmd *cobra.Command, cfg *config.Config, input string, rotate int, speed, fps float64) error {
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if cmd.Flags().Changed("input") {
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abs, err := resolveInput(input)
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if err != nil {
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return err
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}
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cfg.Display.Input = abs
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}
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if cmd.Flags().Changed("rotate") {
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cfg.Display.Rotate = rotate
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}
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if cmd.Flags().Changed("speed") {
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cfg.Display.Speed = speed
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}
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if cmd.Flags().Changed("fps") {
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cfg.Stream.FPS = fps
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}
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return nil
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}
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// resolveInput converts a relative path to an absolute one and verifies the
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// file exists, returning a helpful error otherwise.
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func resolveInput(input string) (string, error) {
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abs, err := filepath.Abs(input)
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if err != nil {
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return "", fmt.Errorf("resolve input %q: %w", input, err)
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}
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if st, err := os.Stat(abs); err != nil {
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return "", fmt.Errorf("input file %q does not exist", abs)
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} else if st.IsDir() {
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return "", fmt.Errorf("input %q is a directory, expected a media file", abs)
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}
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return abs, nil
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}
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