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feat(audio-transform): add LocalVQE backend, bidi gRPC RPC, Studio UI
Introduce a generic "audio transform" capability for any audio-in / audio-out
operation (echo cancellation, noise suppression, dereverberation, voice
conversion, etc.) and ship LocalVQE as the first backend implementation.
Backend protocol:
- Two new gRPC RPCs in backend.proto: unary AudioTransform for batch and
bidirectional AudioTransformStream for low-latency frame-by-frame use.
This is the first bidi stream in the proto; per-frame unary at LocalVQE's
16 ms hop would be RTT-bound. Wire it through pkg/grpc/{client,server,
embed,interface,base} with paired-channel ergonomics.
LocalVQE backend (backend/go/localvqe/):
- Go-Purego wrapper around upstream liblocalvqe.so. CMake builds the upstream
shared lib + its libggml-cpu-*.so runtime variants directly — no MODULE
wrapper needed because LocalVQE handles CPU feature selection internally
via GGML_BACKEND_DL.
- Sets GGML_NTHREADS from opts.Threads (or runtime.NumCPU()-1) — without it
LocalVQE runs single-threaded at ~1× realtime instead of the documented
~9.6×.
- Reference-length policy: zero-pad short refs, truncate long ones (the
trailing portion can't have leaked into a mic that wasn't recording).
- Ginkgo test suite (9 always-on specs + 2 model-gated).
HTTP layer:
- POST /audio/transformations (alias /audio/transform): multipart batch
endpoint, accepts audio + optional reference + params[*]=v form fields.
Persists inputs alongside the output in GeneratedContentDir/audio so the
React UI history can replay past (audio, reference, output) triples.
- GET /audio/transformations/stream: WebSocket bidi, 16 ms PCM frames
(interleaved stereo mic+ref in, mono out). JSON session.update envelope
for config; constants hoisted in core/schema/audio_transform.go.
- ffmpeg-based input normalisation to 16 kHz mono s16 WAV via the existing
utils.AudioToWav (with passthrough fast-path), so the user can upload any
format / rate without seeing the model's strict 16 kHz constraint.
- BackendTraceAudioTransform integration so /api/backend-traces and the
Traces UI light up with audio_snippet base64 and timing.
- Routes registered under routes/localai.go (LocalAI extension; OpenAI has
no /audio/transformations endpoint), traced via TraceMiddleware.
Auth + capability + importer:
- FLAG_AUDIO_TRANSFORM (model_config.go), FeatureAudioTransform (default-on,
in APIFeatures), three RouteFeatureRegistry rows.
- localvqe added to knownPrefOnlyBackends with modality "audio-transform".
- Gallery entry localvqe-v1-1.3m (sha256-pinned, hosted on
huggingface.co/LocalAI-io/LocalVQE).
React UI:
- New /app/transform page surfaced via a dedicated "Enhance" sidebar
section (sibling of Tools / Biometrics) — the page is enhancement, not
generation, so it lives outside Studio. Two AudioInput components
(Upload + Record tabs, drag-drop, mic capture).
- Echo-test button: records mic while playing the loaded reference through
the speakers — the mic naturally picks up speaker bleed, giving a real
(mic, ref) pair for AEC testing without leaving the UI.
- Reusable WaveformPlayer (canvas peaks + click-to-seek + audio controls)
and useAudioPeaks hook (shared module-scoped AudioContext to avoid
hitting browser context limits with three players on one page); migrated
TTS, Sound, Traces audio blocks to use it.
- Past runs saved in localStorage via useMediaHistory('audio-transform') —
the history entry stores all three URLs so clicking re-renders the full
triple, not just the output.
Build + e2e:
- 11 matrix entries removed from .github/workflows/backend.yml (CUDA, ROCm,
SYCL, Metal, L4T): upstream supports only CPU + Vulkan, so we ship those
two and let GPU-class hardware route through Vulkan in the gallery
capabilities map.
- tests-localvqe-grpc-transform job in test-extra.yml (gated on
detect-changes.outputs.localvqe).
- New audio_transform capability + 4 specs in tests/e2e-backends.
- Playwright spec suite in core/http/react-ui/e2e/audio-transform.spec.js
(8 specs covering tabs, file upload, multipart shape, history, errors).
Docs:
- New docs/content/features/audio-transform.md covering the (audio,
reference) mental model, batch + WebSocket wire formats, LocalVQE param
keys, and a YAML config example. Cross-links from text-to-audio and
audio-to-text feature pages.
Assisted-by: Claude:claude-opus-4-7 [Bash Read Edit Write Agent TaskCreate]
Signed-off-by: Richard Palethorpe <io@richiejp.com>
209 lines
6.0 KiB
Go
209 lines
6.0 KiB
Go
package base
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// This is a wrapper to satisfy the GRPC service interface
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// It is meant to be used by the main executable that is the server for the specific backend type (falcon, gpt3, etc)
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import (
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"fmt"
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"os"
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pb "github.com/mudler/LocalAI/pkg/grpc/proto"
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gopsutil "github.com/shirou/gopsutil/v3/process"
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)
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// Base is a base class for all backends to implement
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// Note: the backends that does not support multiple requests
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// should use SingleThread instead
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type Base struct {
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}
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func (llm *Base) Locking() bool {
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return false
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}
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func (llm *Base) Lock() {
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panic("not implemented")
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}
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func (llm *Base) Unlock() {
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panic("not implemented")
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}
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func (llm *Base) Busy() bool {
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return false
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}
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func (llm *Base) Load(opts *pb.ModelOptions) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) Predict(opts *pb.PredictOptions) (string, error) {
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return "", fmt.Errorf("unimplemented")
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}
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func (llm *Base) PredictStream(opts *pb.PredictOptions, results chan string) error {
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close(results)
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) Embeddings(opts *pb.PredictOptions) ([]float32, error) {
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return []float32{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) GenerateImage(*pb.GenerateImageRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) GenerateVideo(*pb.GenerateVideoRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioTranscription(*pb.TranscriptRequest) (pb.TranscriptResult, error) {
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return pb.TranscriptResult{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioTranscriptionStream(*pb.TranscriptRequest, chan *pb.TranscriptStreamResponse) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) TTS(*pb.TTSRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) TTSStream(*pb.TTSRequest, chan []byte) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) SoundGeneration(*pb.SoundGenerationRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) Detect(*pb.DetectOptions) (pb.DetectResponse, error) {
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return pb.DetectResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) FaceVerify(*pb.FaceVerifyRequest) (pb.FaceVerifyResponse, error) {
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return pb.FaceVerifyResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) FaceAnalyze(*pb.FaceAnalyzeRequest) (pb.FaceAnalyzeResponse, error) {
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return pb.FaceAnalyzeResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) VoiceVerify(*pb.VoiceVerifyRequest) (pb.VoiceVerifyResponse, error) {
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return pb.VoiceVerifyResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) VoiceAnalyze(*pb.VoiceAnalyzeRequest) (pb.VoiceAnalyzeResponse, error) {
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return pb.VoiceAnalyzeResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) VoiceEmbed(*pb.VoiceEmbedRequest) (pb.VoiceEmbedResponse, error) {
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return pb.VoiceEmbedResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) TokenizeString(opts *pb.PredictOptions) (pb.TokenizationResponse, error) {
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return pb.TokenizationResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) ModelMetadata(opts *pb.ModelOptions) (*pb.ModelMetadataResponse, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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// backends may wish to call this to capture the gopsutil info, then enhance with additional memory usage details?
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func (llm *Base) Status() (pb.StatusResponse, error) {
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return pb.StatusResponse{
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Memory: memoryUsage(),
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}, nil
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}
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func (llm *Base) StoresSet(*pb.StoresSetOptions) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StoresGet(*pb.StoresGetOptions) (pb.StoresGetResult, error) {
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return pb.StoresGetResult{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) StoresDelete(*pb.StoresDeleteOptions) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StoresFind(*pb.StoresFindOptions) (pb.StoresFindResult, error) {
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return pb.StoresFindResult{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) VAD(*pb.VADRequest) (pb.VADResponse, error) {
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return pb.VADResponse{}, fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioEncode(*pb.AudioEncodeRequest) (*pb.AudioEncodeResult, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioDecode(*pb.AudioDecodeRequest) (*pb.AudioDecodeResult, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioTransform(*pb.AudioTransformRequest) (*pb.AudioTransformResult, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) AudioTransformStream(in <-chan *pb.AudioTransformFrameRequest, out chan<- *pb.AudioTransformFrameResponse) error {
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close(out)
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StartFineTune(*pb.FineTuneRequest) (*pb.FineTuneJobResult, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) FineTuneProgress(*pb.FineTuneProgressRequest, chan *pb.FineTuneProgressUpdate) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StopFineTune(*pb.FineTuneStopRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) ListCheckpoints(*pb.ListCheckpointsRequest) (*pb.ListCheckpointsResponse, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) ExportModel(*pb.ExportModelRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StartQuantization(*pb.QuantizationRequest) (*pb.QuantizationJobResult, error) {
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return nil, fmt.Errorf("unimplemented")
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}
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func (llm *Base) QuantizationProgress(*pb.QuantizationProgressRequest, chan *pb.QuantizationProgressUpdate) error {
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return fmt.Errorf("unimplemented")
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}
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func (llm *Base) StopQuantization(*pb.QuantizationStopRequest) error {
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return fmt.Errorf("unimplemented")
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}
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func memoryUsage() *pb.MemoryUsageData {
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mud := pb.MemoryUsageData{
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Breakdown: make(map[string]uint64),
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}
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pid := int32(os.Getpid())
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backendProcess, err := gopsutil.NewProcess(pid)
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if err == nil {
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memInfo, err := backendProcess.MemoryInfo()
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if err == nil {
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mud.Total = memInfo.VMS // TEST, but rss seems reasonable first guess. Does include swap, but we might care about that.
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mud.Breakdown["gopsutil-RSS"] = memInfo.RSS
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}
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}
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return &mud
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}
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func (llm *Base) Free() error {
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return nil
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}
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