RSDK-12146 Add AudioIn Component

components/audioin/audioin.go

@@ -0,0 +1,111 @@
+// Package audioin defines an audioin component
+package audioin
+
+import (
+	"context"
+
+	commonpb "go.viam.com/api/common/v1"
+	pb "go.viam.com/api/component/audioin/v1"
+
+	"go.viam.com/rdk/resource"
+	"go.viam.com/rdk/robot"
+)
+
+func init() {
+	resource.RegisterAPI(API, resource.APIRegistration[AudioIn]{
+		RPCServiceServerConstructor: NewRPCServiceServer,
+		RPCServiceHandler:           pb.RegisterAudioInServiceHandlerFromEndpoint,
+		RPCServiceDesc:              &pb.AudioInService_ServiceDesc,
+		RPCClient:                   NewClientFromConn,
+	})
+}
+
+// SubtypeName is a constant that identifies the AudioIn resource subtype string.
+const SubtypeName = "audio_in"
+
+// API is a variable that identifies the AudioIn resource API.
+var API = resource.APINamespaceRDK.WithComponentType(SubtypeName)
+
+// Named is a helper for getting the named AudioIn's typed resource name.
+func Named(name string) resource.Name {
+	return resource.NewName(API, name)
+}
+
+// Properties defines properties of an audio in device.
+type Properties struct {
+	SupportedCodecs []string
+	SampleRate      int32
+	NumChannels     int32
+}
+
+// AudioInfo defines information about audio data.
+type AudioInfo struct {
+	Codec       string
+	SampleRate  int32
+	NumChannels int32
+}
+
+// AudioChunk defines a chunk of audio data.
+type AudioChunk struct {
+	AudioData                 []byte
+	Info                      *AudioInfo
+	Sequence                  int32
+	StartTimestampNanoseconds int64
+	EndTimestampNanoseconds   int64
+	RequestID                 string
+}
+
+// AudioIn defines an audioin component.
+type AudioIn interface {
+	resource.Resource
+	GetAudio(ctx context.Context, codec string, durationSeconds float32, previousTimestamp int64, extra map[string]interface{}) (
+		chan *AudioChunk, error)
+	Properties(ctx context.Context, extra map[string]interface{}) (Properties, error)
+}
+
+// FromDependencies is a helper for getting the named AudioIn from a collection of
+// dependencies.
+func FromDependencies(deps resource.Dependencies, name string) (AudioIn, error) {
+	return resource.FromDependencies[AudioIn](deps, Named(name))
+}
+
+// FromRobot is a helper for getting the named AudioIn from the given Robot.
+func FromRobot(r robot.Robot, name string) (AudioIn, error) {
+	return robot.ResourceFromRobot[AudioIn](r, Named(name))
+}
+
+// NamesFromRobot is a helper for getting all AudioIn names from the given Robot.
+func NamesFromRobot(r robot.Robot) []string {
+	return robot.NamesByAPI(r, API)
+}
+
+func audioChunkToPb(chunk *AudioChunk) *pb.AudioChunk {
+	if chunk == nil {
+		return nil
+	}
+
+	var info *commonpb.AudioInfo
+	if chunk.Info != nil {
+		info = &commonpb.AudioInfo{
+			Codec:       chunk.Info.Codec,
+			SampleRate:  chunk.Info.SampleRate,
+			NumChannels: chunk.Info.NumChannels,
+		}
+	}
+
+	return &pb.AudioChunk{
+		AudioData:                 chunk.AudioData,
+		Info:                      info,
+		StartTimestampNanoseconds: chunk.StartTimestampNanoseconds,
+		EndTimestampNanoseconds:   chunk.EndTimestampNanoseconds,
+		Sequence:                  chunk.Sequence,
+	}
+}
+
+func audioInfoPBToStruct(pb *commonpb.AudioInfo) *AudioInfo {
+	return &AudioInfo{
+		Codec:       pb.Codec,
+		SampleRate:  pb.SampleRate,
+		NumChannels: pb.NumChannels,
+	}
+}

components/audioin/client.go

@@ -0,0 +1,124 @@
+package audioin
+
+import (
+	"context"
+	"errors"
+	"io"
+
+	"github.com/google/uuid"
+	commonpb "go.viam.com/api/common/v1"
+	pb "go.viam.com/api/component/audioin/v1"
+	utils "go.viam.com/utils/protoutils"
+	"go.viam.com/utils/rpc"
+
+	"go.viam.com/rdk/logging"
+	"go.viam.com/rdk/protoutils"
+	"go.viam.com/rdk/resource"
+)
+
+// client implements AudioInServiceClient.
+type client struct {
+	resource.Named
+	resource.TriviallyReconfigurable
+	resource.TriviallyCloseable
+	name   string
+	client pb.AudioInServiceClient
+	logger logging.Logger
+}
+
+// NewClientFromConn constructs a new Client from connection passed in.
+func NewClientFromConn(
+	ctx context.Context,
+	conn rpc.ClientConn,
+	remoteName string,
+	name resource.Name,
+	logger logging.Logger,
+) (AudioIn, error) {
+	c := pb.NewAudioInServiceClient(conn)
+	return &client{
+		Named:  name.PrependRemote(remoteName).AsNamed(),
+		name:   name.Name,
+		client: c,
+		logger: logger,
+	}, nil
+}
+
+func (c *client) DoCommand(ctx context.Context, cmd map[string]interface{}) (map[string]interface{}, error) {
+	return protoutils.DoFromResourceClient(ctx, c.client, c.name, cmd)
+}
+
+func (c *client) GetAudio(ctx context.Context, codec string, durationSeconds float32, previousTimestamp int64,
+	extra map[string]interface{}) (chan *AudioChunk, error,
+) {
+	ext, err := utils.StructToStructPb(extra)
+	if err != nil {
+		return nil, err
+	}
+
+	stream, err := c.client.GetAudio(ctx, &pb.GetAudioRequest{
+		Name:              c.name,
+		DurationSeconds:   durationSeconds,
+		Codec:             codec,
+		PreviousTimestamp: previousTimestamp,
+		RequestId:         uuid.New().String(),
+		Extra:             ext,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// small buffered channel prevents blocking when receiver is temporarily slow
+	ch := make(chan *AudioChunk, 8)
+
+	go func() {
+		defer close(ch)
+		for {
+			select {
+			case <-ctx.Done():
+				c.logger.Debug(ctx.Err())
+				return
+			default:
+			}
+			resp, err := stream.Recv()
+			if err != nil {
+				// EOF error indicates stream was closed by server.
+				if !errors.Is(err, io.EOF) {
+					c.logger.Error(err)
+				}
+				return
+			}
+
+			var info *AudioInfo
+			if resp.Audio.Info != nil {
+				info = audioInfoPBToStruct(resp.Audio.Info)
+			}
+
+			ch <- &AudioChunk{
+				AudioData:                 resp.Audio.AudioData,
+				Info:                      info,
+				Sequence:                  resp.Audio.Sequence,
+				StartTimestampNanoseconds: resp.Audio.StartTimestampNanoseconds,
+				EndTimestampNanoseconds:   resp.Audio.EndTimestampNanoseconds,
+				RequestID:                 resp.RequestId,
+			}
+		}
+	}()
+
+	return ch, nil
+}
+
+func (c *client) Properties(ctx context.Context, extra map[string]interface{}) (Properties, error) {
+	ext, err := utils.StructToStructPb(extra)
+	if err != nil {
+		return Properties{}, err
+	}
+	resp, err := c.client.GetProperties(ctx, &commonpb.GetPropertiesRequest{
+		Name:  c.name,
+		Extra: ext,
+	})
+	if err != nil {
+		return Properties{}, err
+	}
+
+	return Properties{SupportedCodecs: resp.SupportedCodecs, SampleRate: resp.SampleRate, NumChannels: resp.NumChannels}, nil
+}