feat(genai sdk): text generation samples with GCS audio and video

genai/go.mod

@@ -0,0 +1,58 @@
+module github.com/GoogleCloudPlatform/golang-samples/genai
+
+go 1.23.0
+
+require (
+	github.com/GoogleCloudPlatform/golang-samples v0.0.0-20250201051611-5fb145d1e974
+	google.golang.org/genai v0.3.0
+)
+
+require (
+	cel.dev/expr v0.19.1 // indirect
+	cloud.google.com/go v0.118.0 // indirect
+	cloud.google.com/go/auth v0.14.0 // indirect
+	cloud.google.com/go/auth/oauth2adapt v0.2.7 // indirect
+	cloud.google.com/go/compute/metadata v0.6.0 // indirect
+	cloud.google.com/go/iam v1.3.1 // indirect
+	cloud.google.com/go/monitoring v1.23.0 // indirect
+	cloud.google.com/go/storage v1.50.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.25.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.49.0 // indirect
+	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.49.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cncf/xds/go v0.0.0-20250121191232-2f005788dc42 // indirect
+	github.com/envoyproxy/go-control-plane/envoy v1.32.3 // indirect
+	github.com/envoyproxy/protoc-gen-validate v1.1.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/s2a-go v0.1.9 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.3.4 // indirect
+	github.com/googleapis/gax-go/v2 v2.14.1 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/contrib/detectors/gcp v1.34.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.59.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.59.0 // indirect
+	go.opentelemetry.io/otel v1.34.0 // indirect
+	go.opentelemetry.io/otel/metric v1.34.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.34.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.34.0 // indirect
+	go.opentelemetry.io/otel/trace v1.34.0 // indirect
+	golang.org/x/crypto v0.32.0 // indirect
+	golang.org/x/net v0.34.0 // indirect
+	golang.org/x/oauth2 v0.25.0 // indirect
+	golang.org/x/sync v0.10.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	google.golang.org/api v0.217.0 // indirect
+	google.golang.org/genproto v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f // indirect
+	google.golang.org/grpc v1.69.4 // indirect
+	google.golang.org/protobuf v1.36.3 // indirect
+)

genai/go.sum

@@ -0,0 +1,129 @@
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+google.golang.org/api v0.217.0 h1:GYrUtD289o4zl1AhiTZL0jvQGa2RDLyC+kX1N/lfGOU=
+google.golang.org/api v0.217.0/go.mod h1:qMc2E8cBAbQlRypBTBWHklNJlaZZJBwDv81B1Iu8oSI=
+google.golang.org/genai v0.3.0 h1:xSYQAFmZvHbQhK8Ay9FvpecMcqVhTGZbLSRiDyxEVBs=
+google.golang.org/genai v0.3.0/go.mod h1:yPyKKBezIg2rqZziLhHQ5CD62HWr7sLDLc2PDzdrNVs=
+google.golang.org/genproto v0.0.0-20250115164207-1a7da9e5054f h1:387Y+JbxF52bmesc8kq1NyYIp33dnxCw6eiA7JMsTmw=
+google.golang.org/genproto v0.0.0-20250115164207-1a7da9e5054f/go.mod h1:0joYwWwLQh18AOj8zMYeZLjzuqcYTU3/nC5JdCvC3JI=
+google.golang.org/genproto/googleapis/api v0.0.0-20250115164207-1a7da9e5054f h1:gap6+3Gk41EItBuyi4XX/bp4oqJ3UwuIMl25yGinuAA=
+google.golang.org/genproto/googleapis/api v0.0.0-20250115164207-1a7da9e5054f/go.mod h1:Ic02D47M+zbarjYYUlK57y316f2MoN0gjAwI3f2S95o=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f h1:OxYkA3wjPsZyBylwymxSHa7ViiW1Sml4ToBrncvFehI=
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+google.golang.org/protobuf v1.36.3/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

genai/text_generation/text_generation_test.go

@@ -0,0 +1,97 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package text_generation
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/golang-samples/internal/testutil"
+)
+
+func TestTextGeneration(t *testing.T) {
+	tc := testutil.SystemTest(t)
+
+	t.Setenv("GOOGLE_GENAI_USE_VERTEXAI", "1")
+	t.Setenv("GOOGLE_CLOUD_LOCATION", "us-central1")
+	t.Setenv("GOOGLE_CLOUD_PROJECT", tc.ProjectID)
+
+	buf := new(bytes.Buffer)
+
+	t.Run("generate with text prompt", func(t *testing.T) {
+		buf.Reset()
+		err := generateWithText(buf)
+		if err != nil {
+			t.Fatalf("generateWithText failed: %v", err)
+		}
+
+		output := buf.String()
+		if output == "" {
+			t.Error("expected non-empty output, got empty")
+		}
+	})
+
+	t.Run("generate with video file input (no sound)", func(t *testing.T) {
+		buf.Reset()
+		err := generateWithMuteVideo(buf)
+		if err != nil {
+			t.Fatalf("generateWithMuteVideo failed: %v", err)
+		}
+
+		output := buf.String()
+		if output == "" {
+			t.Error("expected non-empty output, got empty")
+		}
+	})
+
+	t.Run("generate with video file input", func(t *testing.T) {
+		buf.Reset()
+		err := generateWithVideo(buf)
+		if err != nil {
+			t.Fatalf("generateWithVideo failed: %v", err)
+		}
+
+		output := buf.String()
+		if output == "" {
+			t.Error("expected non-empty output, got empty")
+		}
+	})
+
+	t.Run("generate with audio file input", func(t *testing.T) {
+		buf.Reset()
+		err := generateWithAudio(buf)
+		if err != nil {
+			t.Fatalf("generateWithAudio failed: %v", err)
+		}
+
+		output := buf.String()
+		if output == "" {
+			t.Error("expected non-empty output, got empty")
+		}
+	})
+
+	t.Run("generate an audio transcript", func(t *testing.T) {
+		buf.Reset()
+		err := generateAudioTranscript(buf)
+		if err != nil {
+			t.Fatalf("generateAudioTranscript failed: %v", err)
+		}
+
+		output := buf.String()
+		if output == "" {
+			t.Error("expected non-empty output, got empty")
+		}
+	})
+}

genai/text_generation/textgen_transcript_with_gcs_audio.go

@@ -0,0 +1,69 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package text_generation shows examples of generating text using the GenAI SDK.
+package text_generation
+
+// [START googlegenaisdk_textgen_transcript_with_gcs_audio]
+import (
+	"context"
+	"fmt"
+	"io"
+
+	genai "google.golang.org/genai"
+)
+
+// generateAudioTranscript shows how to generate an audio transcript.
+func generateAudioTranscript(w io.Writer) error {
+	ctx := context.Background()
+
+	client, err := genai.NewClient(ctx, &genai.ClientConfig{
+		HTTPOptions: genai.HTTPOptions{APIVersion: "v1"},
+	})
+	if err != nil {
+		return fmt.Errorf("failed to create genai client: %w", err)
+	}
+
+	modelName := "gemini-2.0-flash-001"
+	contents := []*genai.Content{
+		{Parts: []*genai.Part{
+			{Text: `Transcribe the interview, in the format of timecode, speaker, caption.
+Use speaker A, speaker B, etc. to identify speakers.`},
+			{FileData: &genai.FileData{
+				FileURI:  "gs://cloud-samples-data/generative-ai/audio/pixel.mp3",
+				MIMEType: "audio/mpeg",
+			}},
+		}},
+	}
+
+	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)
+	if err != nil {
+		return fmt.Errorf("failed to generate content: %w", err)
+	}
+
+	respText, err := resp.Text()
+	if err != nil {
+		return fmt.Errorf("failed to convert model response to text: %w", err)
+	}
+	fmt.Fprintln(w, respText)
+
+	// Example response:
+	// 00:00:00, A: your devices are getting better over time.
+	// 00:01:13, A: And so we think about it across the entire portfolio from phones to watch, ...
+	// ...
+
+	return nil
+}
+
+// [END googlegenaisdk_textgen_transcript_with_gcs_audio]