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Attempt: redirect to /dev/null alsa warnings

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This commit is contained in:
Grail Finder
2025-11-10 13:42:48 +03:00
parent a84930621c
commit e1b260c474
1 changed files with 42 additions and 43 deletions
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85
extra/whisper_binary.go
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@@ -47,51 +47,30 @@ func (w *WhisperBinary) StartRecording() error {
return errors.New("recording is already in progress")
}
// Suppress ALSA warnings by setting environment variables
origCard := os.Getenv("ALSA_PCM_CARD")
origDevice := os.Getenv("ALSA_PCM_DEVICE")
origSubdevice := os.Getenv("ALSA_PCM_SUBDEVICE")
// Set specific ALSA device to prevent "Unknown PCM card.pcm.rear" warnings
os.Setenv("ALSA_PCM_CARD", "0")
os.Setenv("ALSA_PCM_DEVICE", "0")
os.Setenv("ALSA_PCM_SUBDEVICE", "0")
if err := portaudio.Initialize(); err != nil {
// Restore original environment variables on error
if origCard != "" {
os.Setenv("ALSA_PCM_CARD", origCard)
} else {
os.Unsetenv("ALSA_PCM_CARD")
}
if origDevice != "" {
os.Setenv("ALSA_PCM_DEVICE", origDevice)
} else {
os.Unsetenv("ALSA_PCM_DEVICE")
}
if origSubdevice != "" {
os.Setenv("ALSA_PCM_SUBDEVICE", origSubdevice)
} else {
os.Unsetenv("ALSA_PCM_SUBDEVICE")
}
return fmt.Errorf("portaudio init failed: %w", err)
// Temporarily redirect stderr to suppress ALSA warnings during PortAudio init
origStderr := os.Stderr
origStdout := os.Stdout
nullFile, err := os.OpenFile("/dev/null", os.O_WRONLY, 0)
if err != nil {
return fmt.Errorf("failed to open /dev/null: %w", err)
}
defer nullFile.Close()
// Restore original environment variables after initialization
if origCard != "" {
os.Setenv("ALSA_PCM_CARD", origCard)
} else {
os.Unsetenv("ALSA_PCM_CARD")
}
if origDevice != "" {
os.Setenv("ALSA_PCM_DEVICE", origDevice)
} else {
os.Unsetenv("ALSA_PCM_DEVICE")
}
if origSubdevice != "" {
os.Setenv("ALSA_PCM_SUBDEVICE", origSubdevice)
} else {
os.Unsetenv("ALSA_PCM_SUBDEVICE")
// Redirect stderr temporarily
os.Stderr = nullFile
os.Stdout = nullFile
// Initialize PortAudio (this is where ALSA warnings occur)
portaudioErr := portaudio.Initialize()
defer func() {
// Restore stderr
os.Stderr = origStderr
os.Stdout = origStdout
}()
if portaudioErr != nil {
return fmt.Errorf("portaudio init failed: %w", portaudioErr)
}
// Initialize audio buffer
@@ -112,6 +91,26 @@ func (w *WhisperBinary) StartRecording() error {
}
func (w *WhisperBinary) recordAudio(stream *portaudio.Stream, in []int16) {
// Temporarily redirect stderr to suppress ALSA warnings during recording operations
origStderr := os.Stderr
origStdout := os.Stdout
nullFile, err := os.OpenFile("/dev/null", os.O_WRONLY, 0)
if err != nil {
// If we can't open /dev/null, log the error but continue anyway
w.logger.Error("Failed to open /dev/null for stderr redirection", "error", err)
// Continue without stderr redirection
} else {
// Redirect stderr temporarily for the duration of this function
os.Stderr = nullFile
os.Stdout = nullFile
defer func() {
// Restore stderr when function exits
os.Stderr = origStderr
os.Stdout = origStdout
nullFile.Close()
}()
}
defer func() {
w.logger.Debug("recordAudio defer function called")
_ = stream.Stop() // Stop the stream