feat(audio): add waveform visualization for PTT voice messages

- Add audio-decode library for audio buffer analysis
- Implement getAudioDuration() to extract duration from audio
- Implement getAudioWaveform() to generate 64-value waveform array
- Normalize waveform values to 0-100 range for WhatsApp compatibility
- Change audio bitrate from 128k to 48k per WhatsApp PTT requirements
- Add Baileys patch to prevent waveform overwrite
- Increase Node.js heap size for build to prevent OOM

Fixes #1086

Author: ffigueroa

Dockerfile

@@ -12,9 +12,12 @@ WORKDIR /evolution
 COPY ./package*.json ./
 COPY ./tsconfig.json ./
 COPY ./tsup.config.ts ./
+COPY ./patches ./patches
 
 RUN npm ci --silent
 
+RUN npx patch-package
+
 COPY ./src ./src
 COPY ./public ./public
 COPY ./prisma ./prisma
@@ -28,7 +31,7 @@ RUN chmod +x ./Docker/scripts/* && dos2unix ./Docker/scripts/*
 
 RUN ./Docker/scripts/generate_database.sh
 
-RUN npm run build
+RUN NODE_OPTIONS="--max-old-space-size=2048" npm run build
 
 FROM node:24-alpine AS final
 

package-lock.json

@@ -20,6 +20,7 @@
     "db:studio": "node runWithProvider.js \"npx prisma studio --schema ./prisma/DATABASE_PROVIDER-schema.prisma\"",
     "db:migrate:dev": "node runWithProvider.js \"rm -rf ./prisma/migrations && cp -r ./prisma/DATABASE_PROVIDER-migrations ./prisma/migrations && npx prisma migrate dev --schema ./prisma/DATABASE_PROVIDER-schema.prisma && cp -r ./prisma/migrations/* ./prisma/DATABASE_PROVIDER-migrations\"",
     "db:migrate:dev:win": "node runWithProvider.js \"xcopy /E /I prisma\\DATABASE_PROVIDER-migrations prisma\\migrations && npx prisma migrate dev --schema prisma\\DATABASE_PROVIDER-schema.prisma\"",
+    "postinstall": "patch-package",
     "prepare": "husky"
   },
   "repository": {
@@ -147,6 +148,7 @@
     "eslint-plugin-simple-import-sort": "^12.1.1",
     "husky": "^9.1.7",
     "lint-staged": "^16.1.6",
+    "patch-package": "^8.0.1",
     "prettier": "^3.4.2",
     "tsconfig-paths": "^4.2.0",
     "tsx": "^4.20.5",

package.json

@@ -0,0 +1,13 @@
+diff --git a/node_modules/baileys/lib/Utils/messages.js b/node_modules/baileys/lib/Utils/messages.js
+index 17b05b8..782efb4 100644
+--- a/node_modules/baileys/lib/Utils/messages.js
++++ b/node_modules/baileys/lib/Utils/messages.js
+@@ -132,7 +132,7 @@ export const prepareWAMessageMedia = async (message, options) => {
+     }
+     const requiresDurationComputation = mediaType === 'audio' && typeof uploadData.seconds === 'undefined';
+     const requiresThumbnailComputation = (mediaType === 'image' || mediaType === 'video') && typeof uploadData['jpegThumbnail'] === 'undefined';
+-    const requiresWaveformProcessing = mediaType === 'audio' && uploadData.ptt === true;
++    const requiresWaveformProcessing = mediaType === 'audio' && uploadData.ptt === true && typeof uploadData.waveform === 'undefined';
+     const requiresAudioBackground = options.backgroundColor && mediaType === 'audio' && uploadData.ptt === true;
+     const requiresOriginalForSomeProcessing = requiresDurationComputation || requiresThumbnailComputation;
+     const { mediaKey, encFilePath, originalFilePath, fileEncSha256, fileSha256, fileLength } = await encryptedStream(uploadData.media, options.mediaTypeOverride || mediaType, {