o i1 @sPdZddlZ    ddededed ed ef d d Zdd eded efddZdS)zX Audio utility functions. Helper functions for audio processing and format conversion. N] sample_ratechannelsbits_per_sample data_sizereturncCsH|||d}||d}tddd|dddd|||||d |}|S) aM Create a WAV file header. Args: sample_rate: Sample rate in Hz (default: 24000) channels: Number of channels (1=mono, 2=stereo) bits_per_sample: Bits per sample (usually 16) data_size: Size of audio data in bytes (0 for unknown) Returns: WAV header bytes (44 bytes) z<4sI4s4sIHHIIHH4sIsRIFF$sWAVEsfmt rrsdata)structpack)rrrr byte_rate block_alignheaderr2/home/ubuntu/veenaModal/veena3modal/audio/utils.pycreate_wav_header s& r audio_bytescCst|ddt|d}||S)z Add WAV header to raw PCM audio bytes. Args: audio_bytes: Raw PCM audio data (16-bit, mono) sample_rate: Sample rate in Hz Returns: Complete WAV file bytes (header + data) rr)rrrr)rlen)rrrrrradd_wav_header3s r)rrrr)r)__doc__r intbytesrrrrrrs$ )