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ai4b.py
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import requests
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import json
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import base64
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class BhashiniClient:
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"""
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A client for interacting with Bhashini's ASR, NMT, and TTS services.
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Methods:
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list_available_languages(task_type): Lists available languages for a given task.
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get_supported_voices(source_language): Gets supported genders for TTS in a language.
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asr(audio_content, source_language, audio_format='wav', sampling_rate=16000): Performs ASR.
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translate(text, source_language, target_language): Translates text from source to target language.
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tts(text, source_language, gender='female', sampling_rate=8000): Performs TTS.
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"""
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PIPELINE_CONFIG_ENDPOINT = "https://meity-auth.ulcacontrib.org/ulca/apis/v0/model/getModelsPipeline"
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INFERENCE_ENDPOINT = "https://dhruva-api.bhashini.gov.in/services/inference/pipeline"
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PIPELINE_ID = "64392f96daac500b55c543cd"
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def __init__(self, user_id, api_key, pipeline_id = PIPELINE_ID):
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"""
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Initializes the BhashiniClient with user credentials and pipeline ID.
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Args:
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user_id (str): Your user ID.
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api_key (str): Your ULCA API key.
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pipeline_id (str): The pipeline ID.
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Raises:
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Exception: If the pipeline configuration retrieval fails.
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"""
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self.user_id = user_id
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self.api_key = api_key
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self.pipeline_id = pipeline_id
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self.headers = {
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"Content-Type": "application/json",
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"userID": self.user_id,
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"ulcaApiKey": self.api_key
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}
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self.config = self._get_pipeline_config()
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self.pipeline_data = self._parse_pipeline_config(self.config)
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self.inference_api_key = self.pipeline_data['inferenceApiKey']
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def _get_pipeline_config(self):
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"""
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Retrieves the pipeline configuration.
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Returns:
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dict: The pipeline configuration.
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Raises:
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Exception: If the request fails.
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"""
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payload = {
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"pipelineTasks": [
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{"taskType": "asr"},
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{"taskType": "translation"},
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{"taskType": "tts"}
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],
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"pipelineRequestConfig": {
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"pipelineId": self.pipeline_id
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}
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}
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response = requests.post(
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self.PIPELINE_CONFIG_ENDPOINT,
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headers=self.headers,
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data=json.dumps(payload)
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)
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response.raise_for_status()
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return response.json()
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def _parse_pipeline_config(self, config):
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"""
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Parses the pipeline configuration and extracts necessary information.
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Args:
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config (dict): The pipeline configuration.
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Returns:
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dict: Parsed pipeline data.
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"""
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inference_api_key = config['pipelineInferenceAPIEndPoint']['inferenceApiKey']['value']
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callback_url = config['pipelineInferenceAPIEndPoint']['callbackUrl']
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pipeline_data = {
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'asr': {},
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'tts': {},
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'translation': {},
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'inferenceApiKey': inference_api_key,
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'callbackUrl': callback_url
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}
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for pipeline in config['pipelineResponseConfig']:
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task_type = pipeline['taskType']
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if task_type in ['asr', 'translation', 'tts']:
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for language_config in pipeline['config']:
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source_language = language_config['language']['sourceLanguage']
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if task_type != 'translation':
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if source_language not in pipeline_data[task_type]:
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pipeline_data[task_type][source_language] = []
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language_info = {
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'serviceId': language_config['serviceId'],
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'sourceScriptCode': language_config['language'].get('sourceScriptCode')
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}
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if task_type == 'tts':
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language_info['supportedVoices'] = language_config.get('supportedVoices', [])
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pipeline_data[task_type][source_language].append(language_info)
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else:
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target_language = language_config['language']['targetLanguage']
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if source_language not in pipeline_data[task_type]:
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pipeline_data[task_type][source_language] = {}
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if target_language not in pipeline_data[task_type][source_language]:
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pipeline_data[task_type][source_language][target_language] = []
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language_info = {
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'serviceId': language_config['serviceId'],
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'sourceScriptCode': language_config['language'].get('sourceScriptCode'),
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'targetScriptCode': language_config['language'].get('targetScriptCode')
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}
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pipeline_data[task_type][source_language][target_language].append(language_info)
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return pipeline_data
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def list_available_languages(self, task_type):
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"""
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Lists the available languages for the specified task.
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Args:
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task_type (str): The task type ('asr', 'translation', or 'tts').
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Returns:
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list or dict: A list of available languages, or a dictionary for translation.
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Raises:
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ValueError: If an invalid task type is provided.
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Usage Example:
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client = BhashiniClient(user_id, api_key, pipeline_id)
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asr_languages = client.list_available_languages('asr')
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print("Available ASR Languages:", asr_languages)
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translation_languages = client.list_available_languages('translation')
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print("Available Translation Languages:", translation_languages)
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"""
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if task_type not in ['asr', 'translation', 'tts']:
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raise ValueError("Invalid task type. Choose from 'asr', 'translation', or 'tts'.")
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if task_type == 'translation':
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languages = {}
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for src_lang in self.pipeline_data['translation']:
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languages[src_lang] = list(self.pipeline_data['translation'][src_lang].keys())
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return languages
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else:
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return list(self.pipeline_data[task_type].keys())
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def get_supported_voices(self, source_language):
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"""
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Returns the supported genders for TTS in the specified language.
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Args:
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source_language (str): The language code (e.g., 'hi' for Hindi).
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Returns:
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list: A list of supported genders (e.g., ['male', 'female']).
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Raises:
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ValueError: If TTS is not supported for the language.
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Usage Example:
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client = BhashiniClient(user_id, api_key, pipeline_id)
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voices = client.get_supported_voices('hi')
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print("Supported voices for Hindi TTS:", voices)
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"""
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if source_language not in self.pipeline_data['tts']:
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available_languages = ', '.join(self.list_available_languages('tts'))
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raise ValueError(
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f"TTS not supported for language '{source_language}'. "
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f"Available languages: {available_languages}"
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)
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service_info = self.pipeline_data['tts'][source_language][0]
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supported_voices = service_info.get('supportedVoices', [])
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return supported_voices
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def asr(self, audio_content, source_language, audio_format='wav', sampling_rate=16000):
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"""
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Performs Automatic Speech Recognition on the provided audio content.
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Args:
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audio_content (bytes): The audio content in bytes.
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source_language (str): The language code of the audio (e.g., 'hi' for Hindi).
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audio_format (str): supported formats of audio content: ('wav', 'mp3', 'flac', 'ogg'.)
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sampling_rate (int): The sampling rate of the audio in Hz.
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Returns:
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dict: The ASR response from the API.
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Raises:
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ValueError: If the language is not supported.
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Exception: If the API request fails.
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Usage Example:
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client = BhashiniClient(user_id, api_key, pipeline_id)
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with open('audio.wav', 'rb') as f:
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audio_content = f.read()
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asr_result = client.asr(audio_content, source_language='hi', audio_format='wav')
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print("ASR Result:", asr_result)
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"""
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if source_language not in self.pipeline_data['asr']:
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available_languages = ', '.join(self.list_available_languages('asr'))
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raise ValueError(
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f"ASR not supported for language '{source_language}'. "
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f"Available languages: {available_languages}"
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)
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service_info = self.pipeline_data['asr'][source_language][0]
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service_id = service_info['serviceId']
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payload = {
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"pipelineTasks": [
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{
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"taskType": "asr",
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"config": {
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"language": {
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"sourceLanguage": source_language
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},
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"serviceId": service_id,
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"audioFormat": audio_format,
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"samplingRate": sampling_rate
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}
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}
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],
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"inputData": {
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"audio": [
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{
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"audioContent": base64.b64encode(audio_content).decode('utf-8')
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}
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]
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}
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}
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headers = {
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'Accept': '*/*',
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'Authorization': self.inference_api_key,
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'Content-Type': 'application/json'
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}
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response = requests.post(
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self.INFERENCE_ENDPOINT,
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headers=headers,
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data=json.dumps(payload)
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)
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self._handle_response_errors(response)
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return response.json()
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def translate(self, text, source_language, target_language):
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"""
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Translates the provided text from the source language to the target language.
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Args:
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text (str): The text to translate.
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source_language (str): The source language code.
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target_language (str): The target language code.
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Returns:
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dict: The translation response from the API.
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Raises:
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ValueError: If the language pair is not supported.
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Exception: If the API request fails.
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Usage Example:
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client = BhashiniClient(user_id, api_key, pipeline_id)
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translation_result = client.translate(
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'मेरा नाम विहिर है।',
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source_language='hi',
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target_language='gu'
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)
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print("Translation Result:", translation_result)
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"""
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if source_language not in self.pipeline_data['translation']:
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available_languages = ', '.join(self.list_available_languages('translation').keys())
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raise ValueError(
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f"Translation not supported from language '{source_language}'. "
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f"Available source languages: {available_languages}"
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)
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if target_language not in self.pipeline_data['translation'][source_language]:
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available_targets = ', '.join(self.pipeline_data['translation'][source_language].keys())
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raise ValueError(
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f"Translation from '{source_language}' to '{target_language}' not supported. "
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f"Available target languages for '{source_language}': {available_targets}"
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)
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service_info = self.pipeline_data['translation'][source_language][target_language][0]
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service_id = service_info['serviceId']
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payload = {
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"pipelineTasks": [
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{
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"taskType": "translation",
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"config": {
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"language": {
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"sourceLanguage": source_language,
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"targetLanguage": target_language
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},
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"serviceId": service_id
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}
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}
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],
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"inputData": {
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"input": [
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{
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"source": text
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}
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]
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}
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}
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headers = {
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'Accept': '*/*',
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'Authorization': self.inference_api_key,
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'Content-Type': 'application/json'
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}
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response = requests.post(
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self.INFERENCE_ENDPOINT,
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headers=headers,
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data=json.dumps(payload)
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)
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self._handle_response_errors(response)
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return response.json()
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def tts(self, text, source_language, gender='female', sampling_rate=8000):
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"""
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Converts the provided text to speech in the specified language.
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Args:
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text (str): The text to convert to speech.
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source_language (str): The language code of the text.
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gender (str): The desired voice gender ('male' or 'female').
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sampling_rate (int): The sampling rate in Hz.
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Returns:
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dict: The TTS response from the API.
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Raises:
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ValueError: If the language or gender is not supported.
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Exception: If the API request fails.
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Usage Example:
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client = BhashiniClient(user_id, api_key, pipeline_id)
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tts_result = client.tts(
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'હેલો વર્લ્ડ',
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source_language='gu',
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gender='female'
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)
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# Save the audio output
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audio_base64 = tts_result['pipelineResponse'][0]['audio'][0]['audioContent']
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audio_data = base64.b64decode(audio_base64)
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with open('output_audio.wav', 'wb') as f:
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f.write(audio_data)
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"""
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if source_language not in self.pipeline_data['tts']:
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available_languages = ', '.join(self.list_available_languages('tts'))
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raise ValueError(
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f"TTS not supported for language '{source_language}'. "
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f"Available languages: {available_languages}"
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)
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service_info = self.pipeline_data['tts'][source_language][0]
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service_id = service_info['serviceId']
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supported_voices = service_info.get('supportedVoices', [])
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if gender not in ['male', 'female']:
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raise ValueError("Gender must be 'male' or 'female'.")
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if supported_voices and gender not in supported_voices:
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available_genders = ', '.join(supported_voices)
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raise ValueError(
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f"Gender '{gender}' not supported for language '{source_language}'. "
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f"Available genders: {available_genders}"
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)
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payload = {
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"pipelineTasks": [
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{
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"taskType": "tts",
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"config": {
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"language": {
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"sourceLanguage": source_language
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},
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"serviceId": service_id,
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"gender": gender,
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"samplingRate": sampling_rate
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}
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}
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],
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"inputData": {
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"input": [
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{
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"source": text
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}
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]
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}
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}
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headers = {
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'Accept': '*/*',
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'Authorization': self.inference_api_key,
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'Content-Type': 'application/json'
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}
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response = requests.post(
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424 |
-
self.INFERENCE_ENDPOINT,
|
425 |
-
headers=headers,
|
426 |
-
data=json.dumps(payload)
|
427 |
-
)
|
428 |
-
|
429 |
-
self._handle_response_errors(response)
|
430 |
-
return response.json()
|
431 |
-
|
432 |
-
def _handle_response_errors(self, response):
|
433 |
-
"""
|
434 |
-
Handles errors in the response.
|
435 |
-
|
436 |
-
Args:
|
437 |
-
response (requests.Response): The response object.
|
438 |
-
|
439 |
-
Raises:
|
440 |
-
Exception: If an HTTP error occurs.
|
441 |
-
"""
|
442 |
-
try:
|
443 |
-
response.raise_for_status()
|
444 |
-
except requests.HTTPError as http_err:
|
445 |
-
try:
|
446 |
-
error_info = response.json()
|
447 |
-
error_message = error_info.get('message', 'An error occurred.')
|
448 |
-
except json.JSONDecodeError:
|
449 |
-
error_message = response.text
|
450 |
-
raise Exception(f"HTTP error occurred: {error_message}") from http_err
|
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