ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/snappy.h

@@ -0,0 +1,60 @@
+/*
+ * Snappy module
+ * Copyright (c) Luca Barbato
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Snappy decompression
+ *
+ * Snappy is a compression/decompression algorithm that does not aim for
+ * maximum compression, but rather for very high speeds and reasonable
+ * compression.
+ *
+ * http://en.wikipedia.org/wiki/Snappy_%28software%29
+ */
+
+#ifndef AVCODEC_SNAPPY_H
+#define AVCODEC_SNAPPY_H
+
+#include <stdint.h>
+
+#include "bytestream.h"
+
+/**
+ * Get the uncompressed length of an input buffer compressed using the Snappy
+ * algorithm. The GetByteContext is not advanced.
+ *
+ * @param gb    input GetByteContext.
+ * @return      A positive length on success, AVERROR otherwise.
+ */
+ int64_t ff_snappy_peek_uncompressed_length(GetByteContext *gb);
+
+/**
+ * Decompress an input buffer using Snappy algorithm.
+ *
+ * @param gb    input GetByteContext.
+ * @param buf   input buffer pointer.
+ * @param size  input/output on input, the size of buffer, on output, the size
+ *              of the uncompressed data.
+ * @return      0 if success, AVERROR otherwise.
+ */
+int ff_snappy_uncompress(GetByteContext *gb, uint8_t *buf, int64_t *size);
+
+#endif /* AVCODEC_SNAPPY_H */