From 37bfc5361685b46fca4402fa22d93f70d5b33759 Mon Sep 17 00:00:00 2001
From: Ferrah Aiko <ferrahwolfeh@proton.me>
Date: Thu, 24 Jul 2025 03:20:39 -0300
Subject: [PATCH] Add the ability to parse workflows from AVIF images (#4420)

---
 browser_tests/assets/workflow.avif            | Bin 0 -> 25985 bytes
 .../tests/loadWorkflowInMedia.spec.ts         |   3 +-
 src/constants/supportedWorkflowFormats.ts     |   4 +-
 src/scripts/app.ts                            |  11 +
 src/scripts/metadata/avif.ts                  | 412 ++++++++++++++++++
 src/scripts/pnginfo.ts                        |   5 +
 src/types/metadataTypes.ts                    |  54 +++
 7 files changed, 486 insertions(+), 3 deletions(-)
 create mode 100644 browser_tests/assets/workflow.avif
 create mode 100644 src/scripts/metadata/avif.ts

diff --git a/browser_tests/assets/workflow.avif b/browser_tests/assets/workflow.avif
new file mode 100644
index 0000000000000000000000000000000000000000..8d8d77cede9862a2bce6464328b7074827c72f95
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zL~-lg=GqvCriGS9w7~1>_0$X;uGz?=@Wl#@KJ(Mkotc*1;h_8!WUB>;xU^Wvl3i0K
z;%3PBDG`O`=W3TeT?`aeQUORB+>$Wp{#7irQsjg6cP#Ko5VJoQdJYB^&g)AL$`#aA
zo|H+>LKIBafF#=re~T2v<$-(G=CrqBm{=gGRt9J<N=mrLu97{q(=w$QlPNv@N&*`j
z`slPQcwc~Om5}f-d*tKmt2YS_&=h_~(L^MTihorj+*{8mX)nHE(uB~iwV9$9xkLh4
zBlV~<(5bodSaZV_=^&S-Kp<TX<7F1I=N~IX-1BO=D<bVx`5G9Eec+h19AOn$pToF5
ap98>S+^BNLJ`wCACLEJpFxY-70FP`%E@FrP

literal 0
HcmV?d00001

diff --git a/browser_tests/tests/loadWorkflowInMedia.spec.ts b/browser_tests/tests/loadWorkflowInMedia.spec.ts
index 215f977e7..1250d3385 100644
--- a/browser_tests/tests/loadWorkflowInMedia.spec.ts
+++ b/browser_tests/tests/loadWorkflowInMedia.spec.ts
@@ -15,7 +15,8 @@ test.describe('Load Workflow in Media', () => {
     'workflow.mp4',
     'workflow.mov',
     'workflow.m4v',
-    'workflow.svg'
+    'workflow.svg',
+    'workflow.avif'
   ]
   fileNames.forEach(async (fileName) => {
     test(`Load workflow in ${fileName} (drop from filesystem)`, async ({
diff --git a/src/constants/supportedWorkflowFormats.ts b/src/constants/supportedWorkflowFormats.ts
index f00bd3f05..ac0bee186 100644
--- a/src/constants/supportedWorkflowFormats.ts
+++ b/src/constants/supportedWorkflowFormats.ts
@@ -6,8 +6,8 @@
  * All supported image formats that can contain workflow data
  */
 export const IMAGE_WORKFLOW_FORMATS = {
-  extensions: ['.png', '.webp', '.svg'],
-  mimeTypes: ['image/png', 'image/webp', 'image/svg+xml']
+  extensions: ['.png', '.webp', '.svg', '.avif'],
+  mimeTypes: ['image/png', 'image/webp', 'image/svg+xml', 'image/avif']
 }
 
 /**
diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index 2061a5f6a..257a30cf6 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -80,6 +80,7 @@ import { deserialiseAndCreate } from '@/utils/vintageClipboard'
 import { type ComfyApi, PromptExecutionError, api } from './api'
 import { defaultGraph } from './defaultGraph'
 import {
+  getAvifMetadata,
   getFlacMetadata,
   getLatentMetadata,
   getPngMetadata,
@@ -1351,6 +1352,16 @@ export class ComfyApp {
       } else {
         this.showErrorOnFileLoad(file)
       }
+    } else if (file.type === 'image/avif') {
+      const { workflow, prompt } = await getAvifMetadata(file)
+
+      if (workflow) {
+        this.loadGraphData(JSON.parse(workflow), true, true, fileName)
+      } else if (prompt) {
+        this.loadApiJson(JSON.parse(prompt), fileName)
+      } else {
+        this.showErrorOnFileLoad(file)
+      }
     } else if (file.type === 'image/webp') {
       const pngInfo = await getWebpMetadata(file)
       // Support loading workflows from that webp custom node.
diff --git a/src/scripts/metadata/avif.ts b/src/scripts/metadata/avif.ts
new file mode 100644
index 000000000..d23adf4bb
--- /dev/null
+++ b/src/scripts/metadata/avif.ts
@@ -0,0 +1,412 @@
+import {
+  type AvifIinfBox,
+  type AvifIlocBox,
+  type AvifInfeBox,
+  ComfyMetadata,
+  ComfyMetadataTags,
+  type IsobmffBoxContentRange
+} from '@/types/metadataTypes'
+
+const readNullTerminatedString = (
+  dataView: DataView,
+  start: number,
+  end: number
+): { str: string; length: number } => {
+  let length = 0
+  while (start + length < end && dataView.getUint8(start + length) !== 0) {
+    length++
+  }
+  const str = new TextDecoder('utf-8').decode(
+    new Uint8Array(dataView.buffer, dataView.byteOffset + start, length)
+  )
+  return { str, length: length + 1 } // Include null terminator
+}
+
+const parseInfeBox = (dataView: DataView, start: number): AvifInfeBox => {
+  const version = dataView.getUint8(start)
+  const flags = dataView.getUint32(start) & 0xffffff
+  let offset = start + 4
+
+  let item_ID: number, item_protection_index: number, item_type: string
+
+  if (version >= 2) {
+    if (version === 2) {
+      item_ID = dataView.getUint16(offset)
+      offset += 2
+    } else {
+      item_ID = dataView.getUint32(offset)
+      offset += 4
+    }
+
+    item_protection_index = dataView.getUint16(offset)
+    offset += 2
+    item_type = String.fromCharCode(
+      ...new Uint8Array(dataView.buffer, dataView.byteOffset + offset, 4)
+    )
+    offset += 4
+
+    const { str: item_name, length: name_len } = readNullTerminatedString(
+      dataView,
+      offset,
+      dataView.byteLength
+    )
+    offset += name_len
+
+    const content_type = readNullTerminatedString(
+      dataView,
+      offset,
+      dataView.byteLength
+    ).str
+
+    return {
+      box_header: { size: 0, type: 'infe' }, // Size is dynamic
+      version,
+      flags,
+      item_ID,
+      item_protection_index,
+      item_type,
+      item_name,
+      content_type
+    }
+  }
+  throw new Error(`Unsupported infe box version: ${version}`)
+}
+
+const parseIinfBox = (
+  dataView: DataView,
+  range: IsobmffBoxContentRange
+): AvifIinfBox => {
+  if (!range) throw new Error('iinf box not found')
+
+  const version = dataView.getUint8(range.start)
+  const flags = dataView.getUint32(range.start) & 0xffffff
+  let offset = range.start + 4
+
+  const entry_count =
+    version === 0 ? dataView.getUint16(offset) : dataView.getUint32(offset)
+  offset += version === 0 ? 2 : 4
+
+  const entries: AvifInfeBox[] = []
+  for (let i = 0; i < entry_count; i++) {
+    const boxSize = dataView.getUint32(offset)
+    const boxType = String.fromCharCode(
+      ...new Uint8Array(dataView.buffer, dataView.byteOffset + offset + 4, 4)
+    )
+
+    if (boxType === 'infe') {
+      const infe = parseInfeBox(dataView, offset + 8)
+      infe.box_header.size = boxSize
+      entries.push(infe)
+    }
+    offset += boxSize
+  }
+
+  return {
+    box_header: { size: range.end - range.start + 8, type: 'iinf' },
+    version,
+    flags,
+    entry_count,
+    entries
+  }
+}
+
+const parseIlocBox = (
+  dataView: DataView,
+  range: IsobmffBoxContentRange
+): AvifIlocBox => {
+  if (!range) throw new Error('iloc box not found')
+
+  const version = dataView.getUint8(range.start)
+  const flags = dataView.getUint32(range.start) & 0xffffff
+  let offset = range.start + 4
+
+  const sizes = dataView.getUint8(offset++)
+  const offset_size = (sizes >> 4) & 0x0f
+  const length_size = sizes & 0x0f
+
+  const base_offset_size = (dataView.getUint8(offset) >> 4) & 0x0f
+  const index_size =
+    version === 1 || version === 2 ? dataView.getUint8(offset) & 0x0f : 0
+  offset++
+
+  const item_count =
+    version < 2 ? dataView.getUint16(offset) : dataView.getUint32(offset)
+  offset += version < 2 ? 2 : 4
+
+  const items = []
+  for (let i = 0; i < item_count; i++) {
+    const item_ID =
+      version < 2 ? dataView.getUint16(offset) : dataView.getUint32(offset)
+    offset += version < 2 ? 2 : 4
+
+    if (version === 1 || version === 2) {
+      offset += 2 // construction_method
+    }
+
+    const data_reference_index = dataView.getUint16(offset)
+    offset += 2
+
+    const base_offset = base_offset_size > 0 ? dataView.getUint32(offset) : 0 // Simplified
+    offset += base_offset_size
+
+    const extent_count = dataView.getUint16(offset)
+    offset += 2
+
+    const extents = []
+    for (let j = 0; j < extent_count; j++) {
+      if ((version === 1 || version === 2) && index_size > 0) {
+        offset += index_size
+      }
+      const extent_offset = dataView.getUint32(offset) // Simplified
+      offset += offset_size
+      const extent_length = dataView.getUint32(offset) // Simplified
+      offset += length_size
+      extents.push({ extent_offset, extent_length })
+    }
+    items.push({
+      item_ID,
+      data_reference_index,
+      base_offset,
+      extent_count,
+      extents
+    })
+  }
+
+  return {
+    box_header: { size: range.end - range.start + 8, type: 'iloc' },
+    version,
+    flags,
+    offset_size,
+    length_size,
+    base_offset_size,
+    index_size,
+    item_count,
+    items
+  }
+}
+
+function findBox(
+  dataView: DataView,
+  start: number,
+  end: number,
+  type: string
+): IsobmffBoxContentRange {
+  let offset = start
+  while (offset < end) {
+    if (offset + 8 > end) break
+    const boxLength = dataView.getUint32(offset)
+    const boxType = String.fromCharCode(
+      ...new Uint8Array(dataView.buffer, dataView.byteOffset + offset + 4, 4)
+    )
+
+    if (boxLength === 0) break
+
+    if (boxType === type) {
+      return { start: offset + 8, end: offset + boxLength }
+    }
+    if (offset + boxLength > end) break
+    offset += boxLength
+  }
+  return null
+}
+
+function parseAvifMetadata(buffer: ArrayBuffer): ComfyMetadata {
+  const metadata: ComfyMetadata = {}
+  const dataView = new DataView(buffer)
+
+  if (
+    dataView.getUint32(4) !== 0x66747970 ||
+    dataView.getUint32(8) !== 0x61766966
+  ) {
+    console.error('Not a valid AVIF file')
+    return {}
+  }
+
+  const metaBox = findBox(dataView, 0, dataView.byteLength, 'meta')
+  if (!metaBox) return {}
+
+  const metaBoxContentStart = metaBox.start + 4 // Skip version and flags
+
+  const iinfBoxRange = findBox(
+    dataView,
+    metaBoxContentStart,
+    metaBox.end,
+    'iinf'
+  )
+  const iinf = parseIinfBox(dataView, iinfBoxRange)
+
+  const exifInfe = iinf.entries.find((e) => e.item_type === 'Exif')
+  if (!exifInfe) return {}
+
+  const ilocBoxRange = findBox(
+    dataView,
+    metaBoxContentStart,
+    metaBox.end,
+    'iloc'
+  )
+  const iloc = parseIlocBox(dataView, ilocBoxRange)
+
+  const exifIloc = iloc.items.find((i) => i.item_ID === exifInfe.item_ID)
+  if (!exifIloc || exifIloc.extents.length === 0) return {}
+
+  const exifExtent = exifIloc.extents[0]
+  const itemData = new Uint8Array(
+    buffer,
+    exifExtent.extent_offset,
+    exifExtent.extent_length
+  )
+
+  let tiffHeaderOffset = -1
+  for (let i = 0; i < itemData.length - 4; i++) {
+    if (
+      (itemData[i] === 0x4d &&
+        itemData[i + 1] === 0x4d &&
+        itemData[i + 2] === 0x00 &&
+        itemData[i + 3] === 0x2a) || // MM*
+      (itemData[i] === 0x49 &&
+        itemData[i + 1] === 0x49 &&
+        itemData[i + 2] === 0x2a &&
+        itemData[i + 3] === 0x00) // II*
+    ) {
+      tiffHeaderOffset = i
+      break
+    }
+  }
+
+  if (tiffHeaderOffset !== -1) {
+    const exifData = itemData.subarray(tiffHeaderOffset)
+    const data: Record<string, any> = parseExifData(exifData)
+    for (const key in data) {
+      const value = data[key]
+      if (typeof value === 'string') {
+        if (key === 'usercomment') {
+          try {
+            const metadataJson = JSON.parse(value)
+            if (metadataJson.prompt) {
+              metadata[ComfyMetadataTags.PROMPT] = metadataJson.prompt
+            }
+            if (metadataJson.workflow) {
+              metadata[ComfyMetadataTags.WORKFLOW] = metadataJson.workflow
+            }
+          } catch (e) {
+            console.error('Failed to parse usercomment JSON', e)
+          }
+        } else {
+          const [metadataKey, ...metadataValueParts] = value.split(':')
+          const metadataValue = metadataValueParts.join(':').trim()
+          if (
+            metadataKey.toLowerCase() ===
+              ComfyMetadataTags.PROMPT.toLowerCase() ||
+            metadataKey.toLowerCase() ===
+              ComfyMetadataTags.WORKFLOW.toLowerCase()
+          ) {
+            try {
+              const jsonValue = JSON.parse(metadataValue)
+              metadata[metadataKey.toLowerCase() as keyof ComfyMetadata] =
+                jsonValue
+            } catch (e) {
+              console.error(`Failed to parse JSON for ${metadataKey}`, e)
+            }
+          }
+        }
+      }
+    }
+  } else {
+    console.log('Warning: TIFF header not found in EXIF data.')
+  }
+
+  return metadata
+}
+
+// @ts-expect-error fixme ts strict error
+export function parseExifData(exifData) {
+  // Check for the correct TIFF header (0x4949 for little-endian or 0x4D4D for big-endian)
+  const isLittleEndian = String.fromCharCode(...exifData.slice(0, 2)) === 'II'
+
+  // Function to read 16-bit and 32-bit integers from binary data
+  // @ts-expect-error fixme ts strict error
+  function readInt(offset, isLittleEndian, length) {
+    let arr = exifData.slice(offset, offset + length)
+    if (length === 2) {
+      return new DataView(arr.buffer, arr.byteOffset, arr.byteLength).getUint16(
+        0,
+        isLittleEndian
+      )
+    } else if (length === 4) {
+      return new DataView(arr.buffer, arr.byteOffset, arr.byteLength).getUint32(
+        0,
+        isLittleEndian
+      )
+    }
+  }
+
+  // Read the offset to the first IFD (Image File Directory)
+  const ifdOffset = readInt(4, isLittleEndian, 4)
+
+  // @ts-expect-error fixme ts strict error
+  function parseIFD(offset) {
+    const numEntries = readInt(offset, isLittleEndian, 2)
+    const result = {}
+
+    // @ts-expect-error fixme ts strict error
+    for (let i = 0; i < numEntries; i++) {
+      const entryOffset = offset + 2 + i * 12
+      const tag = readInt(entryOffset, isLittleEndian, 2)
+      const type = readInt(entryOffset + 2, isLittleEndian, 2)
+      const numValues = readInt(entryOffset + 4, isLittleEndian, 4)
+      const valueOffset = readInt(entryOffset + 8, isLittleEndian, 4)
+
+      // Read the value(s) based on the data type
+      let value
+      if (type === 2) {
+        // ASCII string
+        value = new TextDecoder('utf-8').decode(
+          // @ts-expect-error fixme ts strict error
+          exifData.subarray(valueOffset, valueOffset + numValues - 1)
+        )
+      }
+
+      // @ts-expect-error fixme ts strict error
+      result[tag] = value
+    }
+
+    return result
+  }
+
+  // Parse the first IFD
+  const ifdData = parseIFD(ifdOffset)
+  return ifdData
+}
+
+export function getFromAvifFile(file: File): Promise<Record<string, string>> {
+  return new Promise<Record<string, string>>((resolve) => {
+    const reader = new FileReader()
+    reader.onload = (event) => {
+      const buffer = event.target?.result as ArrayBuffer
+      if (!buffer) {
+        resolve({})
+        return
+      }
+
+      try {
+        const comfyMetadata = parseAvifMetadata(buffer)
+        const result: Record<string, string> = {}
+        if (comfyMetadata.prompt) {
+          result.prompt = JSON.stringify(comfyMetadata.prompt)
+        }
+        if (comfyMetadata.workflow) {
+          result.workflow = JSON.stringify(comfyMetadata.workflow)
+        }
+        resolve(result)
+      } catch (e) {
+        console.error('Parser: Error parsing AVIF metadata:', e)
+        resolve({})
+      }
+    }
+    reader.onerror = (err) => {
+      console.error('FileReader: Error reading AVIF file:', err)
+      resolve({})
+    }
+    reader.readAsArrayBuffer(file)
+  })
+}
diff --git a/src/scripts/pnginfo.ts b/src/scripts/pnginfo.ts
index 7c7f6f597..689537f7e 100644
--- a/src/scripts/pnginfo.ts
+++ b/src/scripts/pnginfo.ts
@@ -1,6 +1,7 @@
 import { LiteGraph } from '@comfyorg/litegraph'
 
 import { api } from './api'
+import { getFromAvifFile } from './metadata/avif'
 import { getFromFlacFile } from './metadata/flac'
 import { getFromPngFile } from './metadata/png'
 
@@ -13,6 +14,10 @@ export function getFlacMetadata(file: File): Promise<Record<string, string>> {
   return getFromFlacFile(file)
 }
 
+export function getAvifMetadata(file: File): Promise<Record<string, string>> {
+  return getFromAvifFile(file)
+}
+
 // @ts-expect-error fixme ts strict error
 function parseExifData(exifData) {
   // Check for the correct TIFF header (0x4949 for little-endian or 0x4D4D for big-endian)
diff --git a/src/types/metadataTypes.ts b/src/types/metadataTypes.ts
index 9170ef6d4..c63324196 100644
--- a/src/types/metadataTypes.ts
+++ b/src/types/metadataTypes.ts
@@ -85,3 +85,57 @@ export type GltfJsonData = {
  * Null if the box was not found.
  */
 export type IsobmffBoxContentRange = { start: number; end: number } | null
+
+export type AvifInfeBox = {
+  box_header: {
+    size: number
+    type: 'infe'
+  }
+  version: number
+  flags: number
+  item_ID: number
+  item_protection_index: number
+  item_type: string
+  item_name: string
+  content_type?: string
+  content_encoding?: string
+}
+
+export type AvifIinfBox = {
+  box_header: {
+    size: number
+    type: 'iinf'
+  }
+  version: number
+  flags: number
+  entry_count: number
+  entries: AvifInfeBox[]
+}
+
+export type AvifIlocItemExtent = {
+  extent_offset: number
+  extent_length: number
+}
+
+export type AvifIlocItem = {
+  item_ID: number
+  data_reference_index: number
+  base_offset: number
+  extent_count: number
+  extents: AvifIlocItemExtent[]
+}
+
+export type AvifIlocBox = {
+  box_header: {
+    size: number
+    type: 'iloc'
+  }
+  version: number
+  flags: number
+  offset_size: number
+  length_size: number
+  base_offset_size: number
+  index_size: number
+  item_count: number
+  items: AvifIlocItem[]
+}