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diff --git a/server/lz4-encoder.h b/server/lz4-encoder.h
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+++ b/server/lz4-encoder.h
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+/*
+   Copyright (C) 2014 Flexible Software Solutions S.L.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+         notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in
+         the documentation and/or other materials provided with the
+         distribution.
+       * Neither the name of the copyright holder nor the names of its
+         contributors may be used to endorse or promote products derived
+         from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
+   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef LZ4_ENCODER_H_
+#define LZ4_ENCODER_H_
+
+#include <spice/types.h>
+#include <spice/macros.h>
+
+SPICE_BEGIN_DECLS
+
+typedef void* Lz4EncoderContext;
+typedef struct Lz4EncoderUsrContext Lz4EncoderUsrContext;
+
+struct Lz4EncoderUsrContext {
+    int (*more_space)(Lz4EncoderUsrContext *usr, uint8_t **io_ptr);
+    int (*more_lines)(Lz4EncoderUsrContext *usr, uint8_t **lines);
+};
+
+Lz4EncoderContext* lz4_encoder_create(Lz4EncoderUsrContext *usr);
+void lz4_encoder_destroy(Lz4EncoderContext *encoder);
+
+/* returns the total size of the encoded data. */
+int lz4_encode(Lz4EncoderContext *lz4, int height, int stride, uint8_t *io_ptr,
+               unsigned int num_io_bytes, int top_down, uint8_t format);
+
+SPICE_END_DECLS
+
+#endif /* LZ4_ENCODER_H_ */