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lib: move frame assembling routines into a separate file and make them usable by non-aes drivers

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Frame assembling routines are not aes-specific, so move them into a separate file
and add an accessor for peeking a pixel.
This commit is contained in:
Vasily Khoruzhick
2015-08-31 21:25:20 -07:00
parent 6664f87d8f
commit e40f7bd1f7
12 changed files with 422 additions and 302 deletions
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25
libfprint/drivers/aes1610.c
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@@ -30,6 +30,7 @@
#include <libusb.h>
#include <assembling.h>
#include <aeslib.h>
#include <fp_internal.h>
@@ -66,6 +67,7 @@ static int adjust_gain(unsigned char *buffer, int status);
#define FRAME_WIDTH 128
#define FRAME_HEIGHT 8
#define FRAME_SIZE (FRAME_WIDTH * FRAME_HEIGHT)
#define IMAGE_WIDTH (FRAME_WIDTH + (FRAME_WIDTH / 2))
/* maximum number of frames to read during a scan */
/* FIXME reduce substantially */
#define MAX_FRAMES 350
@@ -80,6 +82,13 @@ struct aes1610_dev {
uint8_t blanks_count;
};
static struct fpi_frame_asmbl_ctx assembling_ctx = {
.frame_width = FRAME_WIDTH,
.frame_height = FRAME_HEIGHT,
.image_width = IMAGE_WIDTH,
.get_pixel = aes_get_pixel,
};
typedef void (*aes1610_read_regs_cb)(struct fp_img_dev *dev, int status,
unsigned char *regs, void *user_data);
@@ -580,7 +589,7 @@ static void capture_read_strip_cb(struct libusb_transfer *transfer)
if (sum > 0) {
/* FIXME: would preallocating strip buffers be a decent optimization? */
struct aes_stripe *stripe = g_malloc(FRAME_WIDTH * (FRAME_HEIGHT / 2) + sizeof(struct aes_stripe));
struct fpi_frame *stripe = g_malloc(FRAME_WIDTH * (FRAME_HEIGHT / 2) + sizeof(struct fpi_frame));
stripe->delta_x = 0;
stripe->delta_y = 0;
stripdata = stripe->data;
@@ -618,18 +627,14 @@ static void capture_read_strip_cb(struct libusb_transfer *transfer)
/* send stop capture bits */
aes_write_regv(dev, capture_stop, G_N_ELEMENTS(capture_stop), stub_capture_stop_cb, NULL);
aesdev->strips = g_slist_reverse(aesdev->strips);
height = aes_calc_delta(aesdev->strips, aesdev->strips_len,
FRAME_WIDTH, FRAME_HEIGHT, FALSE);
rev_height = aes_calc_delta(aesdev->strips, aesdev->strips_len,
FRAME_WIDTH, FRAME_HEIGHT, TRUE);
height = fpi_do_movement_estimation(&assembling_ctx, aesdev->strips, aesdev->strips_len, FALSE);
rev_height = fpi_do_movement_estimation(&assembling_ctx, aesdev->strips, aesdev->strips_len, TRUE);
fp_dbg("heights: %d rev: %d", height, rev_height);
if (rev_height < height) {
fp_dbg("Reversed direction");
height = aes_calc_delta(aesdev->strips, aesdev->strips_len,
FRAME_WIDTH, FRAME_HEIGHT, FALSE);
height = fpi_do_movement_estimation(&assembling_ctx, aesdev->strips, aesdev->strips_len, FALSE);
}
img = aes_assemble(aesdev->strips, aesdev->strips_len,
FRAME_WIDTH, FRAME_HEIGHT, FRAME_WIDTH + FRAME_WIDTH / 2);
img = fpi_assemble_frames(&assembling_ctx, aesdev->strips, aesdev->strips_len);
g_slist_free_full(aesdev->strips, g_free);
aesdev->strips = NULL;
aesdev->strips_len = 0;
@@ -843,7 +848,7 @@ struct fp_img_driver aes1610_driver = {
},
.flags = 0,
.img_height = -1,
.img_width = FRAME_WIDTH + FRAME_WIDTH / 2,
.img_width = IMAGE_WIDTH,
.bz3_threshold = 50,