Initial commit

.env.example

@@ -0,0 +1,2 @@
+TELEGRAM_APITOKEN=<your bot token here>
+MODELPATH=<path to model here e.g. models/ggml-small.en.bin>

.gitignore

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+.env
+whisper.cpp/
+whisper.cpp/*

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM golang:1.19 AS build-stage
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+COPY *.go ./
+
+RUN git clone https://github.com/ggerganov/whisper.cpp.git && \
+    cd whisper.cpp/bindings/go && \
+    make whisper && \
+    cd /app/ && \
+    C_INCLUDE_PATH=/app/whisper.cpp/ LIBRARY_PATH=/app/whisper.cpp/ go build
+
+FROM debian:bookworm-slim AS build-release-stage
+# TODO: Can't use distroless because of ffmpeg binary requirement, could use static build
+# Still, debian-slim is still slimmer than golang:1.19 image
+
+COPY --from=build-stage /app/ /app/
+
+RUN rm -rf /app/whisper.cpp
+RUN mkdir /app/tmp/
+
+RUN apt-get update && apt-get install ffmpeg -y
+
+WORKDIR /app
+VOLUME /app/models
+
+CMD ["./cbot-telegram"]

README.md

@@ -0,0 +1,42 @@
+# cbot-telegram-whisper
+Simple bot that transcribes Telegram voice messages using OpenAI's 
+using CPU inference thanks to [whisper.cpp](https://github.com/ggerganov/whisper.cpp) 
+
+## Built using: 
+* [go-telegram-bot-api](https://pkg.go.dev/github.com/go-telegram-bot-api/telegram-bot-api/v5) 
+* [whisper.cpp Go bindings](https://github.com/ggerganov/whisper.cpp/tree/master/bindings/go/)
+* [u2takey's ffmpeg-go](https://github.com/u2takey/ffmpeg-go)
+* [grab](https://github.com/cavaliergopher/grab) 
+
+## How to build
+#### You can check out the example [Dockerfile](Dockerfile), but TL;DR:
+
+```bash
+git clone git@github.com:chinese-soup/cbot-telegram-whisper.git && \
+cd cbot-telegram-whisper && \
+git clone https://github.com/ggerganov/whisper.cpp.git && \
+cd whisper.cpp/bindings/go && \
+make whisper && \
+cd ../../.. && \
+go get
+C_INCLUDE_PATH=/app/whisper.cpp/ LIBRARY_PATH=/app/whisper.cpp/ go build -o whisperbot
+```
+
+#### Get a model, e.g.:
+```bash
+bash whisper.cpp/models/download-ggml-model.sh tiny.en
+```
+Check out [whisper.cpp's](https://github.com/ggerganov/whisper.cpp) README for more info.
+
+
+#### Set the environment variables mentioned in `.env.example`, e.g.:
+
+```bash
+export TELEGRAM_APITOKEN=<your bot token here>
+export MODELPATH=whisper.cpp/models/ggml-tiny.en.bin
+```
+
+#### And you're all set, run it:
+```bash
+./whisperbot
+```

docker-compose.yml

@@ -0,0 +1,11 @@
+version: '2'
+services:
+  telegram-cbot:
+    image: telegram-cbot:latest
+    container_name: telegram-cbot
+    restart: always
+    volumes:
+      - ./models:/app/models
+    environment:
+      TELEGRAM_APITOKEN: "${TELEGRAM_APITOKEN}"
+      MODELPATH: "${MODELPATH}"

go.mod

@@ -0,0 +1,17 @@
+module cbot-telegram
+
+go 1.19
+
+require github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1
+
+require (
+	github.com/aws/aws-sdk-go v1.38.20 // indirect
+	github.com/cavaliergopher/grab/v3 v3.0.1 // indirect
+	github.com/ggerganov/whisper.cpp/bindings/go v0.0.0-20230415143044-c23588cc4b2c // indirect
+	github.com/go-audio/audio v1.0.0 // indirect
+	github.com/go-audio/riff v1.0.0 // indirect
+	github.com/go-audio/wav v1.1.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/u2takey/ffmpeg-go v0.4.1 // indirect
+	github.com/u2takey/go-utils v0.3.1 // indirect
+)

go.sum

@@ -0,0 +1,113 @@
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+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
+gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
+sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
+sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

helpers.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"fmt"
+	"github.com/ggerganov/whisper.cpp/bindings/go/pkg/whisper"
+	"github.com/go-audio/wav"
+	"log"
+	"os"
+)
+
+func ProcessSamples(model whisper.Model, samples []float32) (finalText string) {
+	// TODO: Fix err handling
+
+	// Process samples
+	context, err := model.NewContext()
+	if err != nil {
+		panic(err)
+	}
+
+	if err := context.SetLanguage("auto"); err != nil {
+		log.Printf("failed to set language to auto-detect")
+	}
+
+	if err := context.Process(samples, nil); err != nil {
+		panic(err)
+	}
+
+	// Print out the results
+	fmt.Printf("Recognized: ")
+	for {
+		segment, err := context.NextSegment()
+		if err != nil {
+			break
+		}
+		fmt.Printf(" %s ", segment.Text)
+		finalText += fmt.Sprintf(" %v", segment.Text)
+	}
+
+	return finalText
+
+}
+
+func GetSamplesFromFilePath(path string) (samples []float32, err error) {
+	fmt.Printf("Loading %q\n", path)
+	fh, err := os.Open(path)
+	if err != nil {
+		log.Print(err)
+	}
+	defer fh.Close()
+	dec := wav.NewDecoder(fh)
+	if buf, err := dec.FullPCMBuffer(); err != nil {
+		log.Print(err)
+	} else if dec.SampleRate != whisper.SampleRate {
+		log.Printf("unsupported sample rate: %d", dec.SampleRate)
+	} else if dec.NumChans != 1 {
+		log.Printf("unsupported number of channels: %d", dec.NumChans)
+	} else {
+		samples = buf.AsFloat32Buffer().Data
+	}
+	fmt.Printf("Loaded %q, no. of samples = %d\n", path, len(samples))
+	return samples, err
+}
+
+func GetModel() whisper.Model {
+	var modelPath = "./whisper.cpp/bindings/go/models/ggml-small.en.bin"
+
+	customPath, ok := os.LookupEnv("MODELPATH")
+	if ok {
+		log.Printf("MODELPATH set to %v\n", customPath)
+		modelPath = customPath // If we found the env variable, set it, otherwise we will leave the default
+	}
+
+	// Load the model
+	model, err := whisper.New(modelPath)
+	if err != nil {
+		panic(err)
+	}
+	return model
+}