228 lines
6.8 KiB
C
228 lines
6.8 KiB
C
/*
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* AuthenTec AES3500/AES4000 common routines
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*
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* The AES3500 and AES4000 sensors are press-typed, and could capture
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* fingerprint images in 128x128 and 96x96 pixels respectively. They
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* share a same communication interface: a number of frames are
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* transferred and captured, from which a final image could be
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* assembled. Each frame has fixed height of 16 pixels.
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*
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* As the imaging area is a bit small, only a part of finger could be
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* captured, the detected minutiae are not so many that the NBIS
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* matching works not so good. The verification rate is very low at the
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* moment.
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*
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* This work is derived from Daniel Drake's AES4000 driver.
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*
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* Copyright (C) 2013 Juvenn Woo <machese@gmail.com>
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* Copyright (C) 2007-2008 Daniel Drake <dsd@gentoo.org>
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#define FP_COMPONENT "aes3k"
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#include "drivers_api.h"
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#include "aeslib.h"
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#include "aes3k.h"
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typedef struct
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{
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FpiUsbTransfer *img_trf;
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gboolean deactivating;
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} FpiDeviceAes3kPrivate;
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#define CTRL_TIMEOUT 1000
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#define EP_IN (1 | FPI_USB_ENDPOINT_IN)
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#define EP_OUT (2 | FPI_USB_ENDPOINT_OUT)
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static void do_capture (FpImageDevice *dev);
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G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (FpiDeviceAes3k, fpi_device_aes3k, FP_TYPE_IMAGE_DEVICE);
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static void
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aes3k_assemble_image (unsigned char *input, size_t width, size_t height,
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unsigned char *output)
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{
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size_t row, column;
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for (column = 0; column < width; column++)
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{
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for (row = 0; row < height; row += 2)
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{
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output[width * row + column] = (*input & 0x0f) * 17;
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output[width * (row + 1) + column] = ((*input & 0xf0) >> 4) * 17;
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input++;
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}
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}
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}
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static void
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img_cb (FpiUsbTransfer *transfer, FpDevice *device,
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gpointer user_data, GError *error)
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{
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FpImageDevice *dev = FP_IMAGE_DEVICE (device);
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FpiDeviceAes3k *self = FPI_DEVICE_AES3K (device);
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FpiDeviceAes3kPrivate *priv = fpi_device_aes3k_get_instance_private (self);
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FpiDeviceAes3kClass *cls = FPI_DEVICE_AES3K_GET_CLASS (self);
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unsigned char *ptr = transfer->buffer;
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FpImage *tmp;
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FpImage *img;
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int i;
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priv->img_trf = NULL;
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if (error)
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{
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if (g_error_matches (error,
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G_IO_ERROR,
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G_IO_ERROR_CANCELLED))
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{
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/* Deactivation was completed. */
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g_error_free (error);
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if (priv->deactivating)
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fpi_image_device_deactivate_complete (dev, NULL);
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return;
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}
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fpi_image_device_session_error (dev, error);
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}
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fpi_image_device_report_finger_status (dev, TRUE);
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tmp = fp_image_new (cls->frame_width, cls->frame_width);
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tmp->width = cls->frame_width;
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tmp->height = cls->frame_width;
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tmp->flags = FPI_IMAGE_COLORS_INVERTED | FPI_IMAGE_V_FLIPPED | FPI_IMAGE_H_FLIPPED;
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for (i = 0; i < cls->frame_number; i++)
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{
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fp_dbg ("frame header byte %02x", *ptr);
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ptr++;
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aes3k_assemble_image (ptr, cls->frame_width, AES3K_FRAME_HEIGHT, tmp->data + (i * cls->frame_width * AES3K_FRAME_HEIGHT));
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ptr += cls->frame_size;
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}
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/* FIXME: this is an ugly hack to make the image big enough for NBIS
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* to process reliably */
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img = fpi_image_resize (tmp, cls->enlarge_factor, cls->enlarge_factor);
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g_object_unref (tmp);
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fpi_image_device_image_captured (dev, img);
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/* FIXME: rather than assuming finger has gone, we should poll regs until
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* it really has, then restart the capture */
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fpi_image_device_report_finger_status (dev, FALSE);
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do_capture (dev);
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}
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static void
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do_capture (FpImageDevice *dev)
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{
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FpiDeviceAes3k *self = FPI_DEVICE_AES3K (dev);
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FpiDeviceAes3kPrivate *priv = fpi_device_aes3k_get_instance_private (self);
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FpiDeviceAes3kClass *cls = FPI_DEVICE_AES3K_GET_CLASS (self);
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priv->img_trf = fpi_usb_transfer_new (FP_DEVICE (dev));
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fpi_usb_transfer_fill_bulk (priv->img_trf, EP_IN, cls->data_buflen);
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priv->img_trf->short_is_error = TRUE;
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fpi_usb_transfer_submit (priv->img_trf, 0,
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fpi_device_get_cancellable (FP_DEVICE (dev)),
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img_cb, NULL);
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fpi_usb_transfer_unref (priv->img_trf);
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}
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static void
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init_reqs_cb (FpImageDevice *dev, GError *result, void *user_data)
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{
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fpi_image_device_activate_complete (dev, result);
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if (!result)
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do_capture (dev);
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}
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static void
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aes3k_dev_activate (FpImageDevice *dev)
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{
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FpiDeviceAes3k *self = FPI_DEVICE_AES3K (dev);
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FpiDeviceAes3kPrivate *priv = fpi_device_aes3k_get_instance_private (self);
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FpiDeviceAes3kClass *cls = FPI_DEVICE_AES3K_GET_CLASS (self);
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priv->deactivating = FALSE;
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aes_write_regv (dev, cls->init_reqs, cls->init_reqs_len, init_reqs_cb, NULL);
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}
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static void
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aes3k_dev_deactivate (FpImageDevice *dev)
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{
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FpiDeviceAes3k *self = FPI_DEVICE_AES3K (dev);
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FpiDeviceAes3kPrivate *priv = fpi_device_aes3k_get_instance_private (self);
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priv->deactivating = TRUE;
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if (priv->img_trf)
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return;
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fpi_image_device_deactivate_complete (dev, NULL);
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}
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static void
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fpi_device_aes3k_init (FpiDeviceAes3k *self)
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{
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}
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static void
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aes3k_dev_init (FpImageDevice *dev)
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{
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GError *error = NULL;
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if (!g_usb_device_claim_interface (fpi_device_get_usb_device (FP_DEVICE (dev)), 0, 0, &error))
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{
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fpi_image_device_open_complete (dev, error);
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return;
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}
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fpi_image_device_open_complete (dev, NULL);
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}
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static void
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aes3k_dev_deinit (FpImageDevice *dev)
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{
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GError *error = NULL;
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g_usb_device_release_interface (fpi_device_get_usb_device (FP_DEVICE (dev)),
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0, 0, &error);
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fpi_image_device_close_complete (dev, error);
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}
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static void
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fpi_device_aes3k_class_init (FpiDeviceAes3kClass *klass)
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{
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FpDeviceClass *dev_class = FP_DEVICE_CLASS (klass);
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FpImageDeviceClass *img_class = FP_IMAGE_DEVICE_CLASS (klass);
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dev_class->type = FP_DEVICE_TYPE_USB;
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dev_class->scan_type = FP_SCAN_TYPE_PRESS;
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img_class->img_open = aes3k_dev_init;
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img_class->img_close = aes3k_dev_deinit;
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img_class->activate = aes3k_dev_activate;
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img_class->deactivate = aes3k_dev_deactivate;
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/* Extremely low due to low image quality. */
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img_class->bz3_threshold = 9;
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/* Everything else is set by the subclasses. */
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}
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