quirc-demo-opencv: Add OpenCV version of the demo
My motivation is to experiment quirc on macOS, where neither of SDL1 or V4L2 work. ``` % brew install opencv % brew install pkg-config % brew install bsdmake % bsdmake quirc-demo-opencv % ./quirc-demo-opencv ``` Note: the macOS version of GNU make (/usr/bin/make) is a bit old for quirc's Makefile.
This commit is contained in:
YAMAMOTO Takashi
parent
7e7ab596e4
commit
679e43f144
4 changed files with 299 additions and 5 deletions
25
Makefile
25
Makefile
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@ -30,10 +30,15 @@ LIB_OBJ = \
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DEMO_OBJ = \
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demo/camera.o \
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demo/mjpeg.o \
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demo/convert.o \
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demo/convert.o
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DEMO_UTIL_OBJ = \
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demo/dthash.o \
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demo/demoutil.o
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OPENCV_CFLAGS != pkg-config --cflags opencv4
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OPENCV_LIBS != pkg-config --libs opencv4
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QUIRC_CXXFLAGS = $(QUIRC_CFLAGS) $(OPENCV_CFLAGS) --std=c++17
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all: libquirc.so qrtest inspect quirc-demo quirc-scanner
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qrtest: tests/dbgutil.o tests/qrtest.o libquirc.a
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@ -42,11 +47,14 @@ qrtest: tests/dbgutil.o tests/qrtest.o libquirc.a
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inspect: tests/dbgutil.o tests/inspect.o libquirc.a
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$(CC) -o $@ tests/dbgutil.o tests/inspect.o libquirc.a $(LDFLAGS) -lm -ljpeg -lpng $(SDL_LIBS) -lSDL_gfx
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quirc-demo: $(DEMO_OBJ) demo/demo.o libquirc.a
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$(CC) -o $@ $(DEMO_OBJ) demo/demo.o libquirc.a $(LDFLAGS) -lm -ljpeg $(SDL_LIBS) -lSDL_gfx
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quirc-demo: $(DEMO_OBJ) $(DEMO_UTIL_OBJ) demo/demo.o libquirc.a
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$(CC) -o $@ $(DEMO_OBJ) $(DEMO_UTIL_OBJ) demo/demo.o libquirc.a $(LDFLAGS) -lm -ljpeg $(SDL_LIBS) -lSDL_gfx
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quirc-scanner: $(DEMO_OBJ) demo/scanner.o libquirc.a
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$(CC) -o $@ $(DEMO_OBJ) demo/scanner.o libquirc.a $(LDFLAGS) -lm -ljpeg
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quirc-demo-opencv: $(DEMO_UTIL_OBJ) demo/demo_opencv.o libquirc.a
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$(CXX) -o $@ $(DEMO_UTIL_OBJ) demo/demo_opencv.o libquirc.a $(LDFLAGS) -lm -ljpeg $(OPENCV_LIBS)
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quirc-scanner: $(DEMO_OBJ) $(DEMO_UTIL_OBJ) demo/scanner.o libquirc.a
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$(CC) -o $@ $(DEMO_OBJ) $(DEMO_UTIL_OBJ) demo/scanner.o libquirc.a $(LDFLAGS) -lm -ljpeg
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libquirc.a: $(LIB_OBJ)
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rm -f $@
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@ -62,12 +70,17 @@ libquirc.so.$(LIB_VERSION): $(LIB_OBJ)
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.c.o:
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$(CC) $(QUIRC_CFLAGS) -o $@ -c $<
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.SUFFIXES: .cxx
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.cxx.o:
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$(CXX) $(QUIRC_CXXFLAGS) -o $@ -c $<
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install: libquirc.a libquirc.so.$(LIB_VERSION) quirc-demo quirc-scanner
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install -o root -g root -m 0644 lib/quirc.h $(DESTDIR)$(PREFIX)/include
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install -o root -g root -m 0644 libquirc.a $(DESTDIR)$(PREFIX)/lib
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install -o root -g root -m 0755 libquirc.so.$(LIB_VERSION) \
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$(DESTDIR)$(PREFIX)/lib
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install -o root -g root -m 0755 quirc-demo $(DESTDIR)$(PREFIX)/bin
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# install -o root -g root -m 0755 quirc-demo-opencv $(DESTDIR)$(PREFIX)/bin
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install -o root -g root -m 0755 quirc-scanner $(DESTDIR)$(PREFIX)/bin
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uninstall:
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@ -75,6 +88,7 @@ uninstall:
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rm -f $(DESTDIR)$(PREFIX)/lib/libquirc.so.$(LIB_VERSION)
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rm -f $(DESTDIR)$(PREFIX)/lib/libquirc.a
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rm -f $(DESTDIR)$(PREFIX)/bin/quirc-demo
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rm -f $(DESTDIR)$(PREFIX)/bin/quirc-demo-opencv
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rm -f $(DESTDIR)$(PREFIX)/bin/quirc-scanner
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clean:
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@ -85,4 +99,5 @@ clean:
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rm -f qrtest
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rm -f inspect
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rm -f quirc-demo
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rm -f quirc-demo-opencv
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rm -f quirc-scanner
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263
demo/demo_opencv.cxx
Normal file
263
demo/demo_opencv.cxx
Normal file
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@ -0,0 +1,263 @@
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/* quirc -- QR-code recognition library
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* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <assert.h>
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#include <unistd.h>
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#include <quirc.h>
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#include <time.h>
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#include <getopt.h>
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#include <opencv2/videoio.hpp>
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#include <opencv2/imgproc.hpp>
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#include <opencv2/highgui.hpp>
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using namespace cv;
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#include "camera.h"
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#include "convert.h"
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#include "dthash.h"
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#include "demoutil.h"
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/* Collected command-line arguments */
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static int want_frame_rate = 0;
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static int want_verbose = 0;
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static int printer_timeout = 2;
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static const int font = FONT_HERSHEY_PLAIN;
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static const int thickness = 2;
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static const double font_scale = 1.5;
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static Scalar blue = Scalar(255, 0, 8);
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static void fat_text(Mat &screen, int x, int y, const char *text)
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{
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putText(screen, text, Point(x, y), font, font_scale, blue, thickness);
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}
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static void fat_text_cent(Mat &screen, int x, int y, const char *text)
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{
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int baseline;
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Size size = getTextSize(text, font, font_scale, thickness, &baseline);
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putText(screen, text, Point(x - size.width / 2, y - size.height /2),
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font, font_scale, blue, thickness);
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}
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static void draw_qr(Mat &screen, struct quirc *q, struct dthash *dt)
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{
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int count = quirc_count(q);
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int i;
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for (i = 0; i < count; i++) {
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struct quirc_code code;
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struct quirc_data data;
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quirc_decode_error_t err;
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int j;
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int xc = 0;
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int yc = 0;
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char buf[128];
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quirc_extract(q, i, &code);
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for (j = 0; j < 4; j++) {
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struct quirc_point *a = &code.corners[j];
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struct quirc_point *b = &code.corners[(j + 1) % 4];
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xc += a->x;
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yc += a->y;
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line(screen, Point(a->x, a->y), Point(b->x, b->y), blue, 8);
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}
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xc /= 4;
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yc /= 4;
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if (want_verbose) {
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snprintf(buf, sizeof(buf), "Code size: %d cells",
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code.size);
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fat_text_cent(screen, xc, yc - 20, buf);
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}
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err = quirc_decode(&code, &data);
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if (err) {
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if (want_verbose)
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fat_text_cent(screen, xc, yc, quirc_strerror(err));
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} else {
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fat_text_cent(screen, xc, yc, (const char *)data.payload);
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print_data(&data, dt, want_verbose);
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if (want_verbose) {
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snprintf(buf, sizeof(buf),
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"Ver: %d, ECC: %c, Mask: %d, Type: %d",
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data.version, "MLHQ"[data.ecc_level],
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data.mask, data.data_type);
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fat_text_cent(screen, xc, yc + 20, buf);
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}
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}
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}
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}
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static int main_loop(VideoCapture &cap, struct quirc *q)
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{
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time_t last_rate = 0;
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int frame_count = 0;
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char rate_text[64];
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struct dthash dt;
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rate_text[0] = 0;
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dthash_init(&dt, printer_timeout);
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Mat frame;
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for (;;) {
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time_t now = time(NULL);
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cap.read(frame);
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if (frame.empty()) {
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perror("empty frame");
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return 0;
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}
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int w;
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int h;
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uint8_t *buf = quirc_begin(q, &w, &h);
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/* convert frame into buf */
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assert(frame.cols == w);
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assert(frame.rows == h);
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Mat gray;
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cvtColor(frame, gray, COLOR_BGR2GRAY, 0);
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for (int y = 0; y < gray.rows; y++) {
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for (int x = 0; x < gray.cols; x++) {
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buf[(y * w + x)] = gray.at<uint8_t>(y, x);
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}
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}
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quirc_end(q);
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draw_qr(frame, q, &dt);
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if (want_frame_rate)
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fat_text(frame, 20, 20, rate_text);
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imshow("quirc-demo-opencv", frame);
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waitKey(5);
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if (now != last_rate) {
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snprintf(rate_text, sizeof(rate_text),
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"Frame rate: %d fps", frame_count);
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frame_count = 0;
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last_rate = now;
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}
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frame_count++;
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}
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}
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static int run_demo(void)
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{
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struct quirc *qr;
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VideoCapture cap(0);
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unsigned int width;
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unsigned int height;
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if (!cap.isOpened()) {
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perror("camera_open");
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goto fail_qr;
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}
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width = cap.get(CAP_PROP_FRAME_WIDTH);
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height = cap.get(CAP_PROP_FRAME_HEIGHT);
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qr = quirc_new();
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if (!qr) {
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perror("couldn't allocate QR decoder");
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goto fail_qr;
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}
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if (quirc_resize(qr, width, height) < 0) {
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perror("couldn't allocate QR buffer");
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goto fail_qr_resize;
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}
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if (main_loop(cap, qr) < 0) {
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goto fail_main_loop;
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}
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quirc_destroy(qr);
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return 0;
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fail_main_loop:
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fail_qr_resize:
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quirc_destroy(qr);
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fail_qr:
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return -1;
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}
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static void usage(const char *progname)
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{
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printf("Usage: %s [options]\n\n"
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"Valid options are:\n\n"
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" -f Show frame rate on screen.\n"
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" -v Show extra data for detected codes.\n"
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" -p <timeout> Set printer timeout (seconds).\n"
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" --help Show this information.\n"
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" --version Show library version information.\n",
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progname);
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}
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int main(int argc, char **argv)
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{
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static const struct option longopts[] = {
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{"help", 0, 0, 'H'},
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{"version", 0, 0, 'V'},
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{NULL, 0, 0, 0}
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};
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int opt;
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printf("quirc demo with OpenCV\n");
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printf("Copyright (C) 2010-2014 Daniel Beer <dlbeer@gmail.com>\n");
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printf("\n");
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while ((opt = getopt_long(argc, argv, "fvg:p:",
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longopts, NULL)) >= 0)
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switch (opt) {
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case 'V':
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printf("Library version: %s\n", quirc_version());
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return 0;
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case 'H':
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usage(argv[0]);
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return 0;
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case 'v':
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want_verbose = 1;
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break;
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case 'f':
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want_frame_rate = 1;
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break;
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case 'p':
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printer_timeout = atoi(optarg);
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break;
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case '?':
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fprintf(stderr, "Try --help for usage information\n");
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return -1;
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}
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return run_demo();
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}
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@ -20,6 +20,10 @@
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#include "dthash.h"
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#include "quirc.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Check if we've seen the given code, and if not, print it on stdout.
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* Include version info if requested.
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*/
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@ -31,4 +35,8 @@ void print_data(const struct quirc_data *data, struct dthash *dt,
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*/
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int parse_size(const char *text, int *video_width, int *video_height);
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#ifdef __cplusplus
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}
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#endif
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#endif
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@ -40,6 +40,10 @@ struct dthash {
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int timeout;
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Initialise a detector hash with the given timeout. */
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void dthash_init(struct dthash *d, int timeout);
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@ -50,4 +54,8 @@ void dthash_init(struct dthash *d, int timeout);
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*/
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int dthash_seen(struct dthash *d, const struct quirc_data *data);
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#ifdef __cplusplus
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}
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#endif
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#endif
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