feat: add tts to rai core

docs/human_robot_interface/voice_interface.md

@@ -1,36 +1,65 @@
 # Human Robot Interface via Voice
 
-> [!IMPORTANT]
-> RAI_ASR supports both local Whisper models and OpenAI Whisper (cloud). When using the cloud version, the OPENAI_API_KEY environment variable must be set with a valid API key.
+RAI provides two ROS enabled agents for Speech to Speech communication.
 
-## Running example
+## Automatic Speech Recognition Agent
+
+See `examples/s2s/asr.py` for an example usage.
+
+The agent requires configuration of `sounddevice` and `ros2` connectors as well as a required voice activity detection (eg. `SileroVAD`) and transcription model e.g. (`LocalWhisper`), as well as optionally additional models to decide if the transcription should start (e.g. `OpenWakeWord`).
 
-When your robot's whoami package is ready, run the following:
+The Agent publishes information on two topics:
 
-> [!TIP]
-> Make sure rai_whoami is running.
+`/from_human`: `rai_interfaces/msg/HRIMessages` - containing transcriptions of the recorded speech
 
-** Parameters **
-recording_device: The device you want to record with. Check available with:
+`/voice_commands`: `std_msgs/msg/String` - containing control commands, to inform the consumer if speech is currently detected (`{"data": "pause"}`), was detected, and now it stopped (`{"data": "play"}`), and if speech was transcribed (`{"data": "stop"}`).
 
-```bash
-python -c 'import sounddevice as sd; print(sd.query_devices())'
+The Agent utilises sounddevice module to access user's microphone, by default the `"default"` sound device is used.
+To get information about available sounddevices use:
+
+```
+python -c "import sounddevice; print(sounddevice.query_devices())"
 ```
 
-keep_speaker_busy: some speakers may go into low power mode, which may result in truncated speech beginnings. Set to true to play low frequency, low volume noise to prevent sleep mode.
+The device can be identifed by name and passed to the configuration.
+
+## TextToSpeechAgent
+
+See `examples/s2s/tts.py` for an example usage.
+
+The agent requires configuration of `sounddevice` and `ros2` connectors as well as a required TextToSpeech model (e.g. `OpenTTS`).
+The Agent listens for information on two topics:
+
+`/to_human`: `rai_interfaces/msg/HRIMessages` - containing responses to be played to human. These responses are then transcribed and put into the playback queue.
+
+`/voice_commands`: `std_msgs/msg/String` - containing control commands, to pause current playback (`{"data": "pause"}`), start/continue playback (`{"data": "play"}`), or stop the playback and drop the current playback queue (`{"data": "play"}`).
+
+The Agent utilises sounddevice module to access user's speaker, by default the `"default"` sound device is used.
+To get a list of names of available sound devices use:
+
+```
+python -c 'import sounddevice as sd; print([x["name"] for x in list(sd.query_devices())])'
+```
+
+The device can be identifed by name and passed to the configuration.
 
 ### OpenTTS
 
-```bash
-ros2 launch rai_bringup hri.launch.py tts_vendor:=opentts robot_description_package:=<robot_description_package> recording_device:=0 keep_speaker_busy:=(true|false) asr_vendor:=(whisper|openai)
+To run OpenTTS (and the example) a docker server containing the model must be running.
 
+To start it run:
+
+```
+docker run -it -p 5500:5500 synesthesiam/opentts:en --no-espeak
 ```
 
-> [!NOTE]
-> Run OpenTTS with `docker run -it -p 5500:5500 synesthesiam/opentts:en --no-espeak`
+## Running example
 
-### ElevenLabs
+To run the provided example of S2S configuration with a minimal LLM-based agent run in 4 separate terminals:
 
-```bash
-ros2 launch rai_bringup hri.launch.py robot_description_package:=<robot_description_package> recording_device:=0 keep_speaker_busy:=(true|false) asr_vendor:=(whisper|openai)
+```
+$ docker run -it -p 5500:5500 synesthesiam/opentts:en --no-espeak
+$ python ./examples/s2s/asr.py
+$ python ./examples/s2s/tts.py
+$ python ./examples/s2s/conversational.py
 ```

examples/s2s/asr.py

@@ -0,0 +1,117 @@
+# Copyright (C) 2024 Robotec.AI
+#
+# 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.
+
+import argparse
+import signal
+import time
+
+import rclpy
+from rai.agents import VoiceRecognitionAgent
+from rai.communication.sound_device.api import SoundDeviceConfig
+
+from rai_asr.models import LocalWhisper, OpenWakeWord, SileroVAD
+
+VAD_THRESHOLD = 0.8  # Note that this might be different depending on your device
+OWW_THRESHOLD = 0.1  # Note that this might be different depending on your device
+
+VAD_SAMPLING_RATE = 16000  # Or 8000
+DEFAULT_BLOCKSIZE = 1280
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser(
+        description="Voice Activity Detection and Wake Word Detection Configuration",
+        allow_abbrev=True,
+    )
+
+    # Predefined arguments
+    parser.add_argument(
+        "--vad-threshold",
+        type=float,
+        default=VAD_THRESHOLD,
+        help="Voice Activity Detection threshold (default: 0.5)",
+    )
+    parser.add_argument(
+        "--oww-threshold",
+        type=float,
+        default=OWW_THRESHOLD,
+        help="OpenWakeWord threshold (default: 0.1)",
+    )
+    parser.add_argument(
+        "--vad-sampling-rate",
+        type=int,
+        choices=[8000, 16000],
+        default=VAD_SAMPLING_RATE,
+        help="VAD sampling rate (default: 16000)",
+    )
+    parser.add_argument(
+        "--block-size",
+        type=int,
+        default=DEFAULT_BLOCKSIZE,
+        help="Audio block size (default: 1280)",
+    )
+    parser.add_argument(
+        "--device-name",
+        type=str,
+        default="default",
+        help="Microphone device name (default: 'default')",
+    )
+
+    # Use parse_known_args to ignore unknown arguments
+    args, unknown = parser.parse_known_args()
+
+    if unknown:
+        print(f"Ignoring unknown arguments: {unknown}")
+
+    return args
+
+
+if __name__ == "__main__":
+    args = parse_arguments()
+
+    microphone_configuration = SoundDeviceConfig(
+        stream=True,
+        channels=1,
+        device_name=args.device_name,
+        block_size=args.block_size,
+        consumer_sampling_rate=args.vad_sampling_rate,
+        dtype="int16",
+        device_number=None,
+        is_input=True,
+        is_output=False,
+    )
+    vad = SileroVAD(args.vad_sampling_rate, args.vad_threshold)
+    oww = OpenWakeWord("hey jarvis", args.oww_threshold)
+    whisper = LocalWhisper("tiny", args.vad_sampling_rate)
+    # you can easily switch the the provider by changing the whisper object
+    # whisper = OpenAIWhisper("whisper-1", args.vad_sampling_rate, "en")
+
+    rclpy.init()
+    ros2_name = "rai_asr_agent"
+
+    agent = VoiceRecognitionAgent(microphone_configuration, ros2_name, whisper, vad)
+    # optionally add additional models to decide when to record data for transcription
+    # agent.add_detection_model(oww, pipeline="record")
+
+    agent.run()
+
+    def cleanup(signum, frame):
+        agent.stop()
+        rclpy.shutdown()
+        exit(0)
+
+    signal.signal(signal.SIGINT, cleanup)
+
+    while True:
+        time.sleep(1)

examples/s2s/conversational.py

@@ -0,0 +1,170 @@
+# Copyright (C) 2024 Robotec.AI
+#
+# 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.
+
+import argparse
+import logging
+import signal
+import time
+from queue import Queue
+from threading import Event, Thread
+from typing import Dict, List
+
+import rclpy
+from langchain_core.callbacks import BaseCallbackHandler
+from langchain_core.messages import AIMessage, HumanMessage, SystemMessage
+from rai.agents.base import BaseAgent
+from rai.communication import BaseConnector
+from rai.communication.ros2.api import IROS2Message
+from rai.communication.ros2.connectors import ROS2HRIConnector, TopicConfig
+from rai.utils.model_initialization import get_llm_model
+
+from rai_interfaces.msg import HRIMessage as InterfacesHRIMessage
+
+# NOTE: the Agent code included here is temporary until a dedicated speech agent is created
+# it can still serve as a reference for writing your own RAI agents
+
+
+class LLMTextHandler(BaseCallbackHandler):
+    def __init__(self, connector: ROS2HRIConnector):
+        self.connector = connector
+        self.token_buffer = ""
+
+    def on_llm_new_token(self, token: str, **kwargs):
+        self.token_buffer += token
+        if len(self.token_buffer) > 100 or token in [".", "?", "!", ",", ";", ":"]:
+            logging.info(f"Sending token buffer: {self.token_buffer}")
+            self.connector.send_all_targets(AIMessage(content=self.token_buffer))
+            self.token_buffer = ""
+
+    def on_llm_end(
+        self,
+        response,
+        *,
+        run_id,
+        parent_run_id=None,
+        **kwargs,
+    ):
+        if self.token_buffer:
+            logging.info(f"Sending token buffer: {self.token_buffer}")
+            self.connector.send_all_targets(AIMessage(content=self.token_buffer))
+            self.token_buffer = ""
+
+
+class S2SConversationalAgent(BaseAgent):
+    def __init__(self, connectors: Dict[str, BaseConnector]):  # type: ignore
+        super().__init__(connectors=connectors)
+        self.message_history: List[HumanMessage | AIMessage | SystemMessage] = [
+            SystemMessage(
+                content="Pretend you are a robot. Answer as if you were a robot."
+            )
+        ]
+        self.speech_queue: Queue[InterfacesHRIMessage] = Queue()
+
+        self.llm = get_llm_model(model_type="complex_model", streaming=True)
+        self._setup_ros_connector()
+        self.main_thread = None
+        self.stop_thread = Event()
+
+    def run(self):
+        logging.info("Running S2SConversationalAgent")
+        self.main_thread = Thread(target=self._main_loop)
+        self.main_thread.start()
+
+    def _main_loop(self):
+        while not self.stop_thread.is_set():
+            time.sleep(0.01)
+            speech = ""
+            while not self.speech_queue.empty():
+                speech += "".join(self.speech_queue.get().text)
+                logging.info(f"Received human speech {speech}!")
+            if speech != "":
+                self.message_history.append(HumanMessage(content=speech))
+                assert isinstance(self.connectors["ros2"], ROS2HRIConnector)
+                ai_answer = self.llm.invoke(
+                    self.message_history,
+                    config={"callbacks": [LLMTextHandler(self.connectors["ros2"])]},
+                )
+                self.message_history.append(ai_answer)  # type: ignore
+
+    def _on_from_human(self, msg: IROS2Message):
+        assert isinstance(msg, InterfacesHRIMessage)
+        logging.info("Received message from human: %s", msg.text)
+        self.speech_queue.put(msg)
+
+    def _setup_ros_connector(self):
+        self.connectors["ros2"] = ROS2HRIConnector(
+            sources=[
+                (
+                    "/from_human",
+                    TopicConfig(
+                        "rai_interfaces/msg/HRIMessage",
+                        is_subscriber=True,
+                        source_author="human",
+                        subscriber_callback=self._on_from_human,
+                    ),
+                )
+            ],
+            targets=[
+                (
+                    "/to_human",
+                    TopicConfig(
+                        "rai_interfaces/msg/HRIMessage",
+                        source_author="ai",
+                        is_subscriber=False,
+                    ),
+                )
+            ],
+        )
+
+    def stop(self):
+        assert isinstance(self.connectors["ros2"], ROS2HRIConnector)
+        self.connectors["ros2"].shutdown()
+        self.stop_thread.set()
+        if self.main_thread is not None:
+            self.main_thread.join()
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser(
+        description="Text To Speech Configuration",
+        allow_abbrev=True,
+    )
+
+    # Use parse_known_args to ignore unknown arguments
+    args, unknown = parser.parse_known_args()
+
+    if unknown:
+        print(f"Ignoring unknown arguments: {unknown}")
+
+    return args
+
+
+if __name__ == "__main__":
+    args = parse_arguments()
+    rclpy.init()
+    agent = S2SConversationalAgent(connectors={})
+    agent.run()
+
+    def cleanup(signum, frame):
+        print("\nCustom handler: Caught SIGINT (Ctrl+C).")
+        print("Performing cleanup")
+        # Optionally exit the program
+        agent.stop()
+        rclpy.shutdown()
+        exit(0)
+
+    signal.signal(signal.SIGINT, cleanup)
+
+    while True:
+        time.sleep(1)