1 files changed, 54 insertions, 0 deletions
diff --git a/circuitpython/lib/quirc/demo/mjpeg.h b/circuitpython/lib/quirc/demo/mjpeg.h
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+++ b/circuitpython/lib/quirc/demo/mjpeg.h
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+/* quirc -- QR-code recognition library
+ * Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef MJPEG_H_
+#define MJPEG_H_
+
+#include <stdint.h>
+#include <stdio.h>
+#include <jpeglib.h>
+#include <setjmp.h>
+
+struct mjpeg_decoder {
+	/* The error manager must be the first item in this struct */
+	struct jpeg_error_mgr			err;
+	struct jpeg_decompress_struct		dinfo;
+	struct jpeg_source_mgr			src;
+	jmp_buf					env;
+};
+
+/* Construct an MJPEG decoder. */
+void mjpeg_init(struct mjpeg_decoder *mj);
+
+/* Free any memory allocated while decoding MJPEG frames. */
+void mjpeg_free(struct mjpeg_decoder *mj);
+
+/* Decode a single MJPEG image to the buffer given, in RGB format.
+ * Returns 0 on success, -1 if an error occurs (bad data, or image too
+ * big for buffer).
+ */
+int mjpeg_decode_rgb32(struct mjpeg_decoder *mj,
+		       const uint8_t *data, int datalen,
+		       uint8_t *out, int pitch, int max_w, int max_h);
+
+/* Decode a single MJPEG image to the buffer given in 8-bit grayscale.
+ * Returns 0 on success, -1 if an error occurs.
+ */
+int mjpeg_decode_gray(struct mjpeg_decoder *mj,
+		      const uint8_t *data, int datalen,
+		      uint8_t *out, int pitch, int max_w, int max_h);
+
+#endif