wehub-resource-sync
101 lines
3.8 KiB
Go
101 lines
3.8 KiB
Go
package main
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// Started internally by LocalAI - one gRPC server per loaded model.
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//
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// Loads the parakeet shared library via purego and registers the flat
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// C-API entry points declared in parakeet_capi.h. The library name can be
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// overridden with PARAKEET_LIBRARY (mirrors the WHISPER_LIBRARY /
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// VIBEVOICECPP_LIBRARY convention in the sibling backends); the default
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// looks next to this binary for libparakeet.so on Linux and
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// libparakeet.dylib on macOS.
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import (
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"flag"
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"fmt"
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"os"
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"runtime"
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"github.com/ebitengine/purego"
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grpc "github.com/mudler/LocalAI/pkg/grpc"
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)
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var (
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addr = flag.String("addr", "localhost:50051", "the address to connect to")
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)
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type LibFuncs struct {
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FuncPtr any
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Name string
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}
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func main() {
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libName := os.Getenv("PARAKEET_LIBRARY")
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if libName == "" {
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if runtime.GOOS == "darwin" {
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libName = "libparakeet.dylib"
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} else {
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libName = "libparakeet.so"
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}
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}
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lib, err := purego.Dlopen(libName, purego.RTLD_NOW|purego.RTLD_GLOBAL)
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if err != nil {
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panic(fmt.Errorf("parakeet-cpp: dlopen %q: %w", libName, err))
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}
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// Bound 1:1 to parakeet_capi.h. The C-API returns malloc'd char*
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// buffers from transcribe_*; we register those as uintptr so we get
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// the raw pointer back and can call parakeet_capi_free_string on it
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// (purego's string return would copy and forget the original pointer,
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// leaking it on every call).
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libFuncs := []LibFuncs{
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{&CppAbiVersion, "parakeet_capi_abi_version"},
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{&CppLoad, "parakeet_capi_load"},
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{&CppFree, "parakeet_capi_free"},
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{&CppTranscribePath, "parakeet_capi_transcribe_path"},
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{&CppTranscribePathJSON, "parakeet_capi_transcribe_path_json"},
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{&CppStreamBegin, "parakeet_capi_stream_begin"},
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{&CppStreamFeed, "parakeet_capi_stream_feed"},
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{&CppStreamFinalize, "parakeet_capi_stream_finalize"},
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{&CppStreamFree, "parakeet_capi_stream_free"},
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{&CppFreeString, "parakeet_capi_free_string"},
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{&CppLastError, "parakeet_capi_last_error"},
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}
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for _, lf := range libFuncs {
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purego.RegisterLibFunc(lf.FuncPtr, lib, lf.Name)
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}
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// The batched-JSON entry point exists only in newer libparakeet.so (ABI >= 2).
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// Probe with Dlsym and register only if present, so the backend still loads
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// against an older library (it falls back to per-request transcription).
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if sym, err := purego.Dlsym(lib, "parakeet_capi_transcribe_pcm_batch_json"); err == nil && sym != 0 {
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purego.RegisterLibFunc(&CppTranscribePcmBatchJSON, lib, "parakeet_capi_transcribe_pcm_batch_json")
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}
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// Per-request language variants (multilingual nemotron). Same probe pattern:
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// present only in libparakeet.so built with multilingual support, so the
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// backend still loads against an older library and falls back to the
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// non-lang batched + streaming entry points (model default / "auto").
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if sym, err := purego.Dlsym(lib, "parakeet_capi_transcribe_pcm_batch_json_lang"); err == nil && sym != 0 {
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purego.RegisterLibFunc(&CppTranscribePcmBatchJSONLang, lib, "parakeet_capi_transcribe_pcm_batch_json_lang")
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}
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if sym, err := purego.Dlsym(lib, "parakeet_capi_stream_begin_lang"); err == nil && sym != 0 {
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purego.RegisterLibFunc(&CppStreamBeginLang, lib, "parakeet_capi_stream_begin_lang")
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}
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// Streaming JSON entry points (ABI v4): surface per-word timestamps on the
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// streaming path. Same probe pattern; absent in older libparakeet.so, where
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// the backend falls back to the text-only streaming feed.
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if sym, err := purego.Dlsym(lib, "parakeet_capi_stream_feed_json"); err == nil && sym != 0 {
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purego.RegisterLibFunc(&CppStreamFeedJSON, lib, "parakeet_capi_stream_feed_json")
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purego.RegisterLibFunc(&CppStreamFinalizeJSON, lib, "parakeet_capi_stream_finalize_json")
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}
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fmt.Fprintf(os.Stderr, "[parakeet-cpp] ABI=%d\n", CppAbiVersion())
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flag.Parse()
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if err := grpc.StartServer(*addr, &ParakeetCpp{}); err != nil {
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panic(err)
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}
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}
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