334 lines
8.7 KiB
Go
334 lines
8.7 KiB
Go
package stage
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import (
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"context"
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"sync"
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"gitea.maximumdirect.net/eric/narratio/internal/adapters/whisperx"
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"gitea.maximumdirect.net/eric/narratio/internal/artifacts"
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"gitea.maximumdirect.net/eric/narratio/internal/manifest"
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)
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type transcribeStage struct{}
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func (transcribeStage) Name() string { return "transcribe" }
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func (transcribeStage) Declares() IODecl {
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return IODecl{
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Inputs: []artifacts.Ref{
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{Kind: "audio", Category: "audio", RelativePath: "audio/*.flac"},
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},
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Outputs: []artifacts.Ref{
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{Kind: "transcript_raw", Category: "transcripts", RelativePath: "transcripts/raw/*.json"},
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},
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}
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}
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func (transcribeStage) Run(ctx context.Context, env *Env, m *manifest.Manifest) (*StageResult, error) {
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if env == nil || env.Config == nil {
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return nil, fmt.Errorf("transcribe: stage environment config is required")
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}
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if env.ArtifactStore == nil {
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return nil, fmt.Errorf("transcribe: artifact store is required")
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}
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if env.Config.Pipeline == nil || env.Config.Session == nil {
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return nil, fmt.Errorf("transcribe: resolved config must include pipeline and session")
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}
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if env.WhisperX == nil {
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return nil, fmt.Errorf("transcribe: whisperx adapter is required")
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}
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var sessionID string
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if m != nil {
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sessionID = strings.TrimSpace(m.SessionID)
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}
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if sessionID == "" {
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sessionID = strings.TrimSpace(env.Config.Session.SessionID)
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}
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if sessionID == "" {
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return nil, fmt.Errorf("transcribe: session id is required")
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}
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paths := sessionPathsForEnv(env, sessionID)
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runLayout, err := resolveRunStageLayout(env, m, paths, sessionID, "transcribe")
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if err != nil {
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return nil, fmt.Errorf("transcribe: resolve run-stage layout: %w", err)
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}
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audioFiles, err := discoverPreparedAudio(m, paths.AudioDir)
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if err != nil {
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return nil, fmt.Errorf("transcribe: resolve audio inputs: %w", err)
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}
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if len(audioFiles) == 0 {
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return nil, fmt.Errorf("transcribe: no prepared audio files found")
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}
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concurrency := 1
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if env.Config.Pipeline.WhisperX.Concurrency != nil && *env.Config.Pipeline.WhisperX.Concurrency > 0 {
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concurrency = *env.Config.Pipeline.WhisperX.Concurrency
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}
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if concurrency > len(audioFiles) {
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concurrency = len(audioFiles)
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}
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type job struct {
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speakerID string
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audioPath string
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outPath string
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}
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jobs := make([]job, 0, len(audioFiles))
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seenSpeaker := map[string]string{}
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for _, audioPath := range audioFiles {
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base := strings.TrimSuffix(filepath.Base(audioPath), filepath.Ext(audioPath))
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if base == "" {
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return nil, fmt.Errorf("transcribe: could not derive speaker id from %q", audioPath)
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}
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if prev, ok := seenSpeaker[base]; ok {
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return nil, fmt.Errorf("transcribe: duplicate speaker/audio basename %q from %q and %q", base, prev, audioPath)
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}
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seenSpeaker[base] = audioPath
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canonicalOut := filepath.Join(paths.TranscriptsRawDir, base+".json")
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runOut, err := runLocalPathForCanonical(runLayout, paths, canonicalOut)
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if err != nil {
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return nil, fmt.Errorf("transcribe: resolve run-local output path for %q: %w", base, err)
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}
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jobs = append(jobs, job{
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speakerID: base,
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audioPath: audioPath,
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outPath: runOut,
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})
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}
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stageCtx, cancel := context.WithCancel(ctx)
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defer cancel()
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var (
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wg sync.WaitGroup
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jobCh = make(chan job)
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mu sync.Mutex
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firstErr error
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perFile = map[string]map[string]any{}
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outputRef = map[string]artifacts.Ref{}
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)
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worker := func() {
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defer wg.Done()
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for j := range jobCh {
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if stageCtx.Err() != nil {
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return
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}
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res, runErr := env.WhisperX.Transcribe(stageCtx, whisperx.TranscribeRequest{
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SpeakerID: j.speakerID,
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AudioPath: j.audioPath,
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OutputRawTranscriptPath: j.outPath,
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})
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if runErr != nil {
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mu.Lock()
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if firstErr == nil {
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firstErr = fmt.Errorf("speaker %q (%s): %w", j.speakerID, filepath.Base(j.audioPath), runErr)
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cancel()
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}
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mu.Unlock()
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continue
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}
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if strings.TrimSpace(res.OutputRawTranscriptPath) == "" {
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res.OutputRawTranscriptPath = j.outPath
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}
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if filepath.Clean(res.OutputRawTranscriptPath) != filepath.Clean(j.outPath) {
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mu.Lock()
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if firstErr == nil {
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firstErr = fmt.Errorf("speaker %q: adapter output path %q did not match expected %q", j.speakerID, res.OutputRawTranscriptPath, j.outPath)
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cancel()
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}
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mu.Unlock()
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continue
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}
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if err := validateTranscriptJSONFile(j.outPath); err != nil {
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mu.Lock()
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if firstErr == nil {
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firstErr = fmt.Errorf("speaker %q output %q invalid: %w", j.speakerID, j.outPath, err)
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cancel()
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}
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mu.Unlock()
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continue
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}
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meta := map[string]any{
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"attempts": res.Attempts,
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"http_status": res.HTTPStatus,
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"duration_ms": res.Duration.Milliseconds(),
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"output_path": j.outPath,
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}
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mu.Lock()
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perFile[j.speakerID] = meta
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outputRef[j.speakerID] = artifacts.Ref{
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Kind: "transcript_raw",
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Category: "transcripts",
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SessionID: sessionID,
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AbsolutePath: j.outPath,
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}
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mu.Unlock()
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}
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}
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wg.Add(concurrency)
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for i := 0; i < concurrency; i++ {
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go worker()
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}
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dispatch:
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for _, j := range jobs {
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select {
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case <-stageCtx.Done():
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break dispatch
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case jobCh <- j:
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}
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}
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close(jobCh)
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wg.Wait()
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if firstErr != nil {
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return nil, firstErr
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}
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speakers := make([]string, 0, len(perFile))
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for speaker := range perFile {
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speakers = append(speakers, speaker)
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}
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sort.Strings(speakers)
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outputs := make([]artifacts.Ref, 0, len(speakers))
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runOutputPaths := make([]string, 0, len(speakers))
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outputPaths := make([]string, 0, len(speakers))
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orderedPerFile := make(map[string]any, len(speakers))
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for _, speaker := range speakers {
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ref := outputRef[speaker]
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runOutputPaths = append(runOutputPaths, ref.AbsolutePath)
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canonicalOut := filepath.Join(paths.TranscriptsRawDir, speaker+".json")
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materialized, err := materializeRunLocalOutput(env.ArtifactStore, ref.AbsolutePath, canonicalOut, ref)
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if err != nil {
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return nil, fmt.Errorf("transcribe: materialize %q output: %w", speaker, err)
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}
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outputs = append(outputs, materialized)
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outputPaths = append(outputPaths, canonicalOut)
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orderedPerFile[speaker] = perFile[speaker]
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}
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retries := 0
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if env.Config.Pipeline.WhisperX.Retries != nil {
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retries = *env.Config.Pipeline.WhisperX.Retries
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}
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return &StageResult{
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Outputs: outputs,
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Metadata: map[string]any{
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"stage": "transcribe",
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"audio_files_count": len(audioFiles),
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"language": env.Config.Pipeline.WhisperX.Language,
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"concurrency": concurrency,
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"retries": retries,
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"retry_delay": env.Config.Pipeline.WhisperX.RetryDelay,
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"timeout": env.Config.Pipeline.WhisperX.Timeout,
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"run_output_paths": runOutputPaths,
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"output_paths": outputPaths,
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"per_file": orderedPerFile,
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},
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}, nil
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}
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func discoverPreparedAudio(m *manifest.Manifest, audioDir string) ([]string, error) {
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fromManifest := make([]string, 0)
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if m != nil {
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for _, in := range m.Inputs {
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if in.Kind != "audio" {
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continue
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}
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p := strings.TrimSpace(in.Path)
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if p == "" {
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continue
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}
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fromManifest = append(fromManifest, filepath.Clean(p))
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}
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}
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if len(fromManifest) > 0 {
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sort.Strings(fromManifest)
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if err := validateAudioFiles(fromManifest); err != nil {
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return nil, err
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}
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return fromManifest, nil
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}
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entries, err := os.ReadDir(audioDir)
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if err != nil {
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return nil, fmt.Errorf("read audio directory %q: %w", audioDir, err)
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}
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out := make([]string, 0)
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for _, entry := range entries {
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if entry.IsDir() {
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continue
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}
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p := filepath.Join(audioDir, entry.Name())
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if !isFlac(p) {
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continue
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}
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out = append(out, p)
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}
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sort.Strings(out)
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if err := validateAudioFiles(out); err != nil {
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return nil, err
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}
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return out, nil
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}
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func validateAudioFiles(paths []string) error {
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if len(paths) == 0 {
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return nil
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}
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seen := map[string]struct{}{}
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for _, p := range paths {
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clean := filepath.Clean(strings.TrimSpace(p))
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if clean == "" {
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return fmt.Errorf("audio path is required")
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}
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if !isFlac(clean) {
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return fmt.Errorf("audio file %q must have .flac extension", clean)
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}
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info, err := os.Stat(clean)
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if err != nil {
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return fmt.Errorf("audio file %q not found: %w", clean, err)
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}
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if !info.Mode().IsRegular() {
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return fmt.Errorf("audio file %q is not a regular file", clean)
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}
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if _, exists := seen[clean]; exists {
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return fmt.Errorf("duplicate audio file path %q", clean)
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}
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seen[clean] = struct{}{}
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}
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return nil
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}
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func validateTranscriptJSONFile(path string) error {
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if err := requireFile(path, "raw transcript"); err != nil {
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return err
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}
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data, err := os.ReadFile(path)
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if err != nil {
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return fmt.Errorf("read transcript: %w", err)
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}
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var payload any
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if err := json.Unmarshal(data, &payload); err != nil {
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return fmt.Errorf("decode json: %w", err)
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}
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return nil
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}
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