1 files changed, 98 insertions, 0 deletions
diff --git a/examples/jpeg2avifex.c b/examples/jpeg2avifex.c
new file mode 100644
index 0000000..a8afb3b
--- /dev/null
+++ b/examples/jpeg2avifex.c
@@ -0,0 +1,98 @@
+/**
+ * A short program which converts a .jpg file into a .avif file -
+ * just to get a little practice with the basic functionality.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "gd.h"
+
+static void usage() {
+	fprintf(stderr, "Usage: jpeg2avifex [-q quality] [-s speed] infile.jpg outfile.avif\n");
+	exit(1);
+}
+
+int main(int argc, char **argv)
+{
+	gdImagePtr im;
+	FILE *in, *out;
+	int c;
+	int speed = -1, quality = -1; // use default values if unspecified
+	char *infile, *outfile;
+	int failed = 0;
+
+	if (argc < 3) {
+		usage();
+	}
+
+	while ((c = getopt(argc, argv, "q:s:")) != -1) {
+		switch (c) {
+			case 'q':
+				quality = atoi(optarg);
+				break;
+
+			case 's':
+				speed = atoi(optarg);
+				break;
+
+			default:
+				usage();
+		}
+	}
+
+	if (optind > argc - 2)
+		usage();
+
+	infile = strdup(argv[optind++]);
+	outfile = strdup(argv[optind]);
+
+	printf("Reading infile %s\n", infile);
+
+	in = fopen(infile, "rb");
+	if (!in) {
+		fprintf(stderr, "\nError: input file %s does not exist.\n", infile);
+		failed = 1;
+		goto cleanup;
+	}
+
+	im = gdImageCreateFromJpeg(in);
+	fclose(in);
+	if (!im) {
+		fprintf(stderr, "\nError: input file %s is not in JPEG format.\n", infile);
+		failed = 1;
+		goto cleanup;
+	}
+
+	out = fopen(outfile, "wb");
+	if (!out) {
+		fprintf(stderr, "\nError: can't write to output file %s\n", outfile);
+		failed = 1;
+		goto cleanup;
+	}
+
+	fprintf(stderr, "Encoding...\n");
+
+	gdImageAvifEx(im, out, quality, speed);
+
+	printf("Wrote outfile %s.\n", outfile);
+
+	fclose(out);
+
+cleanup:
+	if (im)
+		gdImageDestroy(im);
+
+	gdFree(infile);
+	gdFree(outfile);
+
+	exit(failed);
+}