initial

2026-01-09 07:14:39 +00:00
parent 95da37590c
commit 05e1f94c79
22 changed files with 6549 additions and 10 deletions
--- a/ts/scanner/scanner.classes.saneprotocol.ts
+++ b/ts/scanner/scanner.classes.saneprotocol.ts
@@ -0,0 +1,694 @@
+import * as plugins from '../plugins.js';
+import type {
+  ISaneDevice,
+  ISaneOption,
+  ISaneParameters,
+  IScanOptions,
+  IScanResult,
+  TColorMode,
+} from '../interfaces/index.js';
+
+/**
+ * SANE network protocol RPC codes
+ */
+const enum SaneRpc {
+  INIT = 0,
+  GET_DEVICES = 1,
+  OPEN = 2,
+  CLOSE = 3,
+  GET_OPTION_DESCRIPTORS = 4,
+  CONTROL_OPTION = 5,
+  GET_PARAMETERS = 6,
+  START = 7,
+  CANCEL = 8,
+  AUTHORIZE = 9,
+  EXIT = 10,
+}
+
+/**
+ * SANE status codes
+ */
+const enum SaneStatus {
+  GOOD = 0,
+  UNSUPPORTED = 1,
+  CANCELLED = 2,
+  DEVICE_BUSY = 3,
+  INVAL = 4,
+  EOF = 5,
+  JAMMED = 6,
+  NO_DOCS = 7,
+  COVER_OPEN = 8,
+  IO_ERROR = 9,
+  NO_MEM = 10,
+  ACCESS_DENIED = 11,
+}
+
+/**
+ * SANE option types
+ */
+const enum SaneValueType {
+  BOOL = 0,
+  INT = 1,
+  FIXED = 2,
+  STRING = 3,
+  BUTTON = 4,
+  GROUP = 5,
+}
+
+/**
+ * SANE option units
+ */
+const enum SaneUnit {
+  NONE = 0,
+  PIXEL = 1,
+  BIT = 2,
+  MM = 3,
+  DPI = 4,
+  PERCENT = 5,
+  MICROSECOND = 6,
+}
+
+/**
+ * SANE constraint types
+ */
+const enum SaneConstraintType {
+  NONE = 0,
+  RANGE = 1,
+  WORD_LIST = 2,
+  STRING_LIST = 3,
+}
+
+/**
+ * SANE control option actions
+ */
+const enum SaneAction {
+  GET_VALUE = 0,
+  SET_VALUE = 1,
+  SET_AUTO = 2,
+}
+
+const SANE_PORT = 6566;
+const SANE_NET_PROTOCOL_VERSION = 3;
+
+/**
+ * Status code to error message mapping
+ */
+const STATUS_MESSAGES: Record<number, string> = {
+  [SaneStatus.GOOD]: 'Success',
+  [SaneStatus.UNSUPPORTED]: 'Operation not supported',
+  [SaneStatus.CANCELLED]: 'Operation cancelled',
+  [SaneStatus.DEVICE_BUSY]: 'Device busy',
+  [SaneStatus.INVAL]: 'Invalid argument',
+  [SaneStatus.EOF]: 'End of file',
+  [SaneStatus.JAMMED]: 'Document feeder jammed',
+  [SaneStatus.NO_DOCS]: 'No documents in feeder',
+  [SaneStatus.COVER_OPEN]: 'Scanner cover open',
+  [SaneStatus.IO_ERROR]: 'I/O error',
+  [SaneStatus.NO_MEM]: 'Out of memory',
+  [SaneStatus.ACCESS_DENIED]: 'Access denied',
+};
+
+/**
+ * SANE network protocol client
+ */
+export class SaneProtocol {
+  private socket: plugins.net.Socket | null = null;
+  private address: string;
+  private port: number;
+  private handle: number = -1;
+  private options: ISaneOption[] = [];
+  private readBuffer: Buffer = Buffer.alloc(0);
+
+  constructor(address: string, port: number = SANE_PORT) {
+    this.address = address;
+    this.port = port;
+  }
+
+  /**
+   * Connect to SANE daemon
+   */
+  public async connect(): Promise<void> {
+    return new Promise((resolve, reject) => {
+      this.socket = plugins.net.createConnection(
+        { host: this.address, port: this.port },
+        () => {
+          this.init()
+            .then(() => resolve())
+            .catch(reject);
+        }
+      );
+
+      this.socket.on('error', reject);
+      this.socket.on('data', (data: Buffer) => {
+        this.readBuffer = Buffer.concat([this.readBuffer, data]);
+      });
+    });
+  }
+
+  /**
+   * Disconnect from SANE daemon
+   */
+  public async disconnect(): Promise<void> {
+    if (this.handle >= 0) {
+      await this.close();
+    }
+
+    await this.exit();
+
+    if (this.socket) {
+      this.socket.destroy();
+      this.socket = null;
+    }
+  }
+
+  /**
+   * Initialize connection (SANE_NET_INIT)
+   */
+  private async init(): Promise<void> {
+    const request = this.buildRequest(SaneRpc.INIT);
+    this.writeWord(request, SANE_NET_PROTOCOL_VERSION);
+    this.writeString(request, ''); // Username (empty for now)
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    const version = this.readWord(response);
+
+    if (status !== SaneStatus.GOOD) {
+      throw new Error(`SANE init failed: ${STATUS_MESSAGES[status] || 'Unknown error'}`);
+    }
+  }
+
+  /**
+   * Get available devices (SANE_NET_GET_DEVICES)
+   */
+  public async getDevices(): Promise<ISaneDevice[]> {
+    const request = this.buildRequest(SaneRpc.GET_DEVICES);
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    if (status !== SaneStatus.GOOD) {
+      throw new Error(`Failed to get devices: ${STATUS_MESSAGES[status]}`);
+    }
+
+    const devices: ISaneDevice[] = [];
+    const count = this.readWord(response);
+
+    for (let i = 0; i < count; i++) {
+      const hasDevice = this.readWord(response);
+      if (hasDevice) {
+        devices.push({
+          name: this.readString(response),
+          vendor: this.readString(response),
+          model: this.readString(response),
+          type: this.readString(response),
+        });
+      }
+    }
+
+    return devices;
+  }
+
+  /**
+   * Open a device (SANE_NET_OPEN)
+   */
+  public async open(deviceName: string): Promise<void> {
+    const request = this.buildRequest(SaneRpc.OPEN);
+    this.writeString(request, deviceName);
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    if (status !== SaneStatus.GOOD) {
+      // Check for authorization required
+      const resource = this.readString(response);
+      if (resource) {
+        throw new Error(`Authorization required for: ${resource}`);
+      }
+      throw new Error(`Failed to open device: ${STATUS_MESSAGES[status]}`);
+    }
+
+    this.handle = this.readWord(response);
+    this.readString(response); // resource (should be empty on success)
+
+    // Get option descriptors
+    await this.getOptionDescriptors();
+  }
+
+  /**
+   * Close the current device (SANE_NET_CLOSE)
+   */
+  public async close(): Promise<void> {
+    if (this.handle < 0) {
+      return;
+    }
+
+    const request = this.buildRequest(SaneRpc.CLOSE);
+    this.writeWord(request, this.handle);
+
+    await this.sendRequest(request);
+    await this.readResponse(); // Just read to clear buffer
+
+    this.handle = -1;
+    this.options = [];
+  }
+
+  /**
+   * Exit connection (SANE_NET_EXIT)
+   */
+  private async exit(): Promise<void> {
+    const request = this.buildRequest(SaneRpc.EXIT);
+    await this.sendRequest(request);
+  }
+
+  /**
+   * Get option descriptors (SANE_NET_GET_OPTION_DESCRIPTORS)
+   */
+  private async getOptionDescriptors(): Promise<void> {
+    const request = this.buildRequest(SaneRpc.GET_OPTION_DESCRIPTORS);
+    this.writeWord(request, this.handle);
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const count = this.readWord(response);
+    this.options = [];
+
+    for (let i = 0; i < count; i++) {
+      const hasOption = this.readWord(response);
+      if (!hasOption) {
+        continue;
+      }
+
+      const option: ISaneOption = {
+        name: this.readString(response),
+        title: this.readString(response),
+        description: this.readString(response),
+        type: this.mapValueType(this.readWord(response)),
+        unit: this.mapUnit(this.readWord(response)),
+        size: this.readWord(response),
+        capabilities: this.readWord(response),
+        constraintType: this.mapConstraintType(this.readWord(response)),
+      };
+
+      // Read constraint based on type
+      if (option.constraintType === 'range') {
+        option.constraint = {
+          range: {
+            min: this.readWord(response),
+            max: this.readWord(response),
+            quant: this.readWord(response),
+          },
+        };
+      } else if (option.constraintType === 'word_list') {
+        const wordCount = this.readWord(response);
+        const words: number[] = [];
+        for (let j = 0; j < wordCount; j++) {
+          words.push(this.readWord(response));
+        }
+        option.constraint = { wordList: words };
+      } else if (option.constraintType === 'string_list') {
+        const strings: string[] = [];
+        let str: string;
+        while ((str = this.readString(response)) !== '') {
+          strings.push(str);
+        }
+        option.constraint = { stringList: strings };
+      }
+
+      this.options.push(option);
+    }
+  }
+
+  /**
+   * Set an option value
+   */
+  public async setOption(name: string, value: unknown): Promise<void> {
+    const optionIndex = this.options.findIndex((o) => o.name === name);
+    if (optionIndex < 0) {
+      throw new Error(`Unknown option: ${name}`);
+    }
+
+    const option = this.options[optionIndex];
+    const request = this.buildRequest(SaneRpc.CONTROL_OPTION);
+
+    this.writeWord(request, this.handle);
+    this.writeWord(request, optionIndex);
+    this.writeWord(request, SaneAction.SET_VALUE);
+    this.writeWord(request, option.type === 'string' ? (value as string).length + 1 : option.size);
+
+    // Write value based on type
+    if (option.type === 'bool' || option.type === 'int') {
+      this.writeWord(request, value as number);
+    } else if (option.type === 'fixed') {
+      this.writeWord(request, Math.round((value as number) * 65536));
+    } else if (option.type === 'string') {
+      this.writeString(request, value as string);
+    }
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    if (status !== SaneStatus.GOOD) {
+      throw new Error(`Failed to set option ${name}: ${STATUS_MESSAGES[status]}`);
+    }
+  }
+
+  /**
+   * Get scan parameters (SANE_NET_GET_PARAMETERS)
+   */
+  public async getParameters(): Promise<ISaneParameters> {
+    const request = this.buildRequest(SaneRpc.GET_PARAMETERS);
+    this.writeWord(request, this.handle);
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    if (status !== SaneStatus.GOOD) {
+      throw new Error(`Failed to get parameters: ${STATUS_MESSAGES[status]}`);
+    }
+
+    const formatCode = this.readWord(response);
+    const format = this.mapFormat(formatCode);
+
+    return {
+      format,
+      lastFrame: this.readWord(response) === 1,
+      bytesPerLine: this.readWord(response),
+      pixelsPerLine: this.readWord(response),
+      lines: this.readWord(response),
+      depth: this.readWord(response),
+    };
+  }
+
+  /**
+   * Start scanning (SANE_NET_START)
+   */
+  public async start(): Promise<{ port: number; byteOrder: 'little' | 'big' }> {
+    const request = this.buildRequest(SaneRpc.START);
+    this.writeWord(request, this.handle);
+
+    await this.sendRequest(request);
+    const response = await this.readResponse();
+
+    const status = this.readWord(response);
+    if (status !== SaneStatus.GOOD) {
+      throw new Error(`Failed to start scan: ${STATUS_MESSAGES[status]}`);
+    }
+
+    const port = this.readWord(response);
+    const byteOrder = this.readWord(response) === 0x1234 ? 'little' : 'big';
+    this.readString(response); // resource
+
+    return { port, byteOrder };
+  }
+
+  /**
+   * Cancel scanning (SANE_NET_CANCEL)
+   */
+  public async cancel(): Promise<void> {
+    const request = this.buildRequest(SaneRpc.CANCEL);
+    this.writeWord(request, this.handle);
+
+    await this.sendRequest(request);
+    await this.readResponse();
+  }
+
+  /**
+   * Perform a complete scan
+   */
+  public async scan(options: IScanOptions): Promise<IScanResult> {
+    // Configure scan options
+    await this.configureOptions(options);
+
+    // Get parameters
+    const params = await this.getParameters();
+
+    // Start scan and get data port
+    const { port, byteOrder } = await this.start();
+
+    // Connect to data port and read image data
+    const imageData = await this.readImageData(port, params, byteOrder);
+
+    return {
+      data: imageData,
+      format: options.format ?? 'png',
+      width: params.pixelsPerLine,
+      height: params.lines,
+      resolution: options.resolution ?? 300,
+      colorMode: options.colorMode ?? 'color',
+      mimeType: `image/${options.format ?? 'png'}`,
+    };
+  }
+
+  /**
+   * Configure scan options based on IScanOptions
+   */
+  private async configureOptions(options: IScanOptions): Promise<void> {
+    // Set resolution
+    if (options.resolution) {
+      const resOption = this.options.find((o) => o.name === 'resolution');
+      if (resOption) {
+        await this.setOption('resolution', options.resolution);
+      }
+    }
+
+    // Set color mode
+    if (options.colorMode) {
+      const modeOption = this.options.find((o) => o.name === 'mode');
+      if (modeOption) {
+        const modeValue = this.mapColorMode(options.colorMode);
+        await this.setOption('mode', modeValue);
+      }
+    }
+
+    // Set scan area
+    if (options.area) {
+      const tlxOption = this.options.find((o) => o.name === 'tl-x');
+      const tlyOption = this.options.find((o) => o.name === 'tl-y');
+      const brxOption = this.options.find((o) => o.name === 'br-x');
+      const bryOption = this.options.find((o) => o.name === 'br-y');
+
+      if (tlxOption) await this.setOption('tl-x', options.area.x);
+      if (tlyOption) await this.setOption('tl-y', options.area.y);
+      if (brxOption) await this.setOption('br-x', options.area.x + options.area.width);
+      if (bryOption) await this.setOption('br-y', options.area.y + options.area.height);
+    }
+
+    // Set source
+    if (options.source) {
+      const sourceOption = this.options.find((o) => o.name === 'source');
+      if (sourceOption) {
+        await this.setOption('source', options.source);
+      }
+    }
+  }
+
+  /**
+   * Read image data from data port
+   */
+  private async readImageData(
+    port: number,
+    params: ISaneParameters,
+    _byteOrder: 'little' | 'big'
+  ): Promise<Buffer> {
+    return new Promise((resolve, reject) => {
+      const dataSocket = plugins.net.createConnection(
+        { host: this.address, port },
+        () => {
+          const chunks: Buffer[] = [];
+
+          dataSocket.on('data', (data: Buffer) => {
+            // Data format: 4 bytes length + data
+            // Read records until length is 0xFFFFFFFF (end marker)
+            let offset = 0;
+            while (offset < data.length) {
+              if (offset + 4 > data.length) {
+                break;
+              }
+
+              const length = data.readUInt32BE(offset);
+              offset += 4;
+
+              if (length === 0xffffffff) {
+                // End of data
+                dataSocket.destroy();
+                resolve(Buffer.concat(chunks));
+                return;
+              }
+
+              if (offset + length > data.length) {
+                // Incomplete record, wait for more data
+                break;
+              }
+
+              chunks.push(data.subarray(offset, offset + length));
+              offset += length;
+            }
+          });
+
+          dataSocket.on('end', () => {
+            resolve(Buffer.concat(chunks));
+          });
+
+          dataSocket.on('error', reject);
+        }
+      );
+
+      dataSocket.on('error', reject);
+    });
+  }
+
+  /**
+   * Map color mode to SANE mode string
+   */
+  private mapColorMode(mode: TColorMode): string {
+    switch (mode) {
+      case 'color':
+        return 'Color';
+      case 'grayscale':
+        return 'Gray';
+      case 'blackwhite':
+        return 'Lineart';
+      default:
+        return 'Color';
+    }
+  }
+
+  /**
+   * Map SANE format code to string
+   */
+  private mapFormat(code: number): ISaneParameters['format'] {
+    const formats: Record<number, ISaneParameters['format']> = {
+      0: 'gray',
+      1: 'rgb',
+      2: 'red',
+      3: 'green',
+      4: 'blue',
+    };
+    return formats[code] ?? 'gray';
+  }
+
+  /**
+   * Map value type code to string
+   */
+  private mapValueType(code: number): ISaneOption['type'] {
+    const types: Record<number, ISaneOption['type']> = {
+      [SaneValueType.BOOL]: 'bool',
+      [SaneValueType.INT]: 'int',
+      [SaneValueType.FIXED]: 'fixed',
+      [SaneValueType.STRING]: 'string',
+      [SaneValueType.BUTTON]: 'button',
+      [SaneValueType.GROUP]: 'group',
+    };
+    return types[code] ?? 'int';
+  }
+
+  /**
+   * Map unit code to string
+   */
+  private mapUnit(code: number): ISaneOption['unit'] {
+    const units: Record<number, ISaneOption['unit']> = {
+      [SaneUnit.NONE]: 'none',
+      [SaneUnit.PIXEL]: 'pixel',
+      [SaneUnit.BIT]: 'bit',
+      [SaneUnit.MM]: 'mm',
+      [SaneUnit.DPI]: 'dpi',
+      [SaneUnit.PERCENT]: 'percent',
+      [SaneUnit.MICROSECOND]: 'microsecond',
+    };
+    return units[code] ?? 'none';
+  }
+
+  /**
+   * Map constraint type code to string
+   */
+  private mapConstraintType(code: number): ISaneOption['constraintType'] {
+    const types: Record<number, ISaneOption['constraintType']> = {
+      [SaneConstraintType.NONE]: 'none',
+      [SaneConstraintType.RANGE]: 'range',
+      [SaneConstraintType.WORD_LIST]: 'word_list',
+      [SaneConstraintType.STRING_LIST]: 'string_list',
+    };
+    return types[code] ?? 'none';
+  }
+
+  // =========================================================================
+  // Low-level protocol helpers
+  // =========================================================================
+
+  private buildRequest(rpc: SaneRpc): Buffer[] {
+    const chunks: Buffer[] = [];
+    const header = Buffer.alloc(4);
+    header.writeUInt32BE(rpc, 0);
+    chunks.push(header);
+    return chunks;
+  }
+
+  private writeWord(chunks: Buffer[], value: number): void {
+    const buf = Buffer.alloc(4);
+    buf.writeUInt32BE(value >>> 0, 0);
+    chunks.push(buf);
+  }
+
+  private writeString(chunks: Buffer[], str: string): void {
+    const strBuf = Buffer.from(str + '\0', 'utf-8');
+    this.writeWord(chunks, strBuf.length);
+    chunks.push(strBuf);
+  }
+
+  private async sendRequest(chunks: Buffer[]): Promise<void> {
+    if (!this.socket) {
+      throw new Error('Not connected');
+    }
+
+    const data = Buffer.concat(chunks);
+    return new Promise((resolve, reject) => {
+      this.socket!.write(data, (err) => {
+        if (err) reject(err);
+        else resolve();
+      });
+    });
+  }
+
+  private async readResponse(): Promise<{ buffer: Buffer; offset: number }> {
+    // Wait for data
+    await this.waitForData(4);
+
+    return { buffer: this.readBuffer, offset: 0 };
+  }
+
+  private async waitForData(minBytes: number): Promise<void> {
+    const startTime = Date.now();
+    const timeout = 30000;
+
+    while (this.readBuffer.length < minBytes) {
+      if (Date.now() - startTime > timeout) {
+        throw new Error('Timeout waiting for SANE response');
+      }
+      await plugins.smartdelay.delayFor(10);
+    }
+  }
+
+  private readWord(response: { buffer: Buffer; offset: number }): number {
+    const value = response.buffer.readUInt32BE(response.offset);
+    response.offset += 4;
+    return value;
+  }
+
+  private readString(response: { buffer: Buffer; offset: number }): string {
+    const length = this.readWord(response);
+    if (length === 0) {
+      return '';
+    }
+
+    const str = response.buffer.toString('utf-8', response.offset, response.offset + length - 1);
+    response.offset += length;
+    return str;
+  }
+}