iframe-proxy

edisonmartinsmkt · 2025-06-08T23:57:19Z

This update adds automatic detection and conversion of LPCM (Linear PCM) audio files — a format commonly generated by Google Text-to-Speech — ensuring proper sample rate and compatibility.

✅ The following formats were tested and confirmed working:
m4a, mp3, mp4, wav, opus, oga, ogg, and lpcm.

🧪 During testing, the resulting audio files consistently displayed waveform previews (waves) on WhatsApp for Android, iOS, and Web.

Summary by Sourcery

Support automatic detection and conversion of LPCM audio streams in the WhatsApp integration to fix distorted waveforms and ensure cross-platform compatibility.

New Features:

Automatically detect LPCM audio URLs and apply raw PCM ffmpeg settings for conversion

Bug Fixes:

Fix waveform distortion in WhatsApp audio previews by correctly handling LPCM streams

Build:

Add 'audio-decode' dependency to enable LPCM processing

sourcery-ai · 2025-06-08T23:57:23Z

Reviewer's Guide

Introduces automatic detection and handling of LPCM audio streams in the WhatsApp integration by adjusting the ffmpeg invocation when encountering raw PCM input, and adds a new dependency to support LPCM decoding.

Sequence Diagram for LPCM Audio Processing

sequenceDiagram
    participant AudioSource
    participant BaileysStartupService
    participant FFMpegProcess as ffmpeg

    AudioSource->>BaileysStartupService: Provides audio (e.g., URL to .lpcm file)
    BaileysStartupService->>BaileysStartupService: isLpcm = checkAudioFormat(audio)
    alt isLpcm is true
        BaileysStartupService->>BaileysStartupService: Log "Detected LPCM input"
        BaileysStartupService->>FFMpegProcess: Initialize with LPCM settings (s16le, 24000Hz, 1ch)
    else isLpcm is false
        BaileysStartupService->>FFMpegProcess: Initialize with default settings for other formats
    end
    BaileysStartupService->>FFMpegProcess: Set output to ogg/libopus, no video
    FFMpegProcess->>BaileysStartupService: Processed audio stream (OGG/Opus)
    BaileysStartupService-->>AudioSource: Returns processed OGG audio stream

Updated Class Diagram for BaileysStartupService

classDiagram
  class ChannelStartupService {
    %% Base class placeholder
  }
  class BaileysStartupService {
    -logger: Logger
    +processAudio(audio: string | Buffer) : Promise~PassThrough~
  }
  BaileysStartupService --|> ChannelStartupService

File-Level Changes

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feat(audio): support LPCM and fix waveform distortion

44e0ff2

DavidsonGomes merged commit 9e1f9cb into EvolutionAPI:develop Jun 8, 2025
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feat(audio): support LPCM and fix waveform distortion#1574

feat(audio): support LPCM and fix waveform distortion#1574
DavidsonGomes merged 1 commit intoEvolutionAPI:developfrom
edisonmartinsmkt:develop

edisonmartinsmkt commented Jun 8, 2025 •

edited by sourcery-ai Bot

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Summary by Sourcery

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Reviewer's Guide

Sequence Diagram for LPCM Audio Processing

Updated Class Diagram for BaileysStartupService

File-Level Changes

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edisonmartinsmkt commented Jun 8, 2025 •

edited by sourcery-ai Bot

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sourcery-ai Bot commented Jun 8, 2025 •

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