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-rw-r--r--libavutil/lzo.c60
1 files changed, 52 insertions, 8 deletions
diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index eff3cd2333..c723257212 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -2,20 +2,20 @@
* LZO 1x decompression
* Copyright (c) 2006 Reimar Doeffinger
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -102,7 +102,7 @@ static inline void copy(LZOContext *c, int cnt)
/**
* @brief Copies previously decoded bytes to current position.
- * @param back how many bytes back we start
+ * @param back how many bytes back we start, must be > 0
* @param cnt number of bytes to copy, must be >= 0
*
* cnt > back is valid, this will copy the bytes we just copied,
@@ -129,11 +129,11 @@ int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
int state = 0;
int x;
LZOContext c;
- if (!*outlen || !*inlen) {
+ if (*outlen <= 0 || *inlen <= 0) {
int res = 0;
- if (!*outlen)
+ if (*outlen <= 0)
res |= AV_LZO_OUTPUT_FULL;
- if (!*inlen)
+ if (*inlen <= 0)
res |= AV_LZO_INPUT_DEPLETED;
return res;
}
@@ -196,3 +196,47 @@ int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
*outlen = c.out_end - c.out;
return c.error;
}
+
+#ifdef TEST
+#include <stdio.h>
+#include <lzo/lzo1x.h>
+#include "log.h"
+#define MAXSZ (10*1024*1024)
+
+/* Define one of these to 1 if you wish to benchmark liblzo
+ * instead of our native implementation. */
+#define BENCHMARK_LIBLZO_SAFE 0
+#define BENCHMARK_LIBLZO_UNSAFE 0
+
+int main(int argc, char *argv[]) {
+ FILE *in = fopen(argv[1], "rb");
+ uint8_t *orig = av_malloc(MAXSZ + 16);
+ uint8_t *comp = av_malloc(2*MAXSZ + 16);
+ uint8_t *decomp = av_malloc(MAXSZ + 16);
+ size_t s = fread(orig, 1, MAXSZ, in);
+ lzo_uint clen = 0;
+ long tmp[LZO1X_MEM_COMPRESS];
+ int inlen, outlen;
+ int i;
+ av_log_set_level(AV_LOG_DEBUG);
+ lzo1x_999_compress(orig, s, comp, &clen, tmp);
+ for (i = 0; i < 300; i++) {
+START_TIMER
+ inlen = clen; outlen = MAXSZ;
+#if BENCHMARK_LIBLZO_SAFE
+ if (lzo1x_decompress_safe(comp, inlen, decomp, &outlen, NULL))
+#elif BENCHMARK_LIBLZO_UNSAFE
+ if (lzo1x_decompress(comp, inlen, decomp, &outlen, NULL))
+#else
+ if (av_lzo1x_decode(decomp, &outlen, comp, &inlen))
+#endif
+ av_log(NULL, AV_LOG_ERROR, "decompression error\n");
+STOP_TIMER("lzod")
+ }
+ if (memcmp(orig, decomp, s))
+ av_log(NULL, AV_LOG_ERROR, "decompression incorrect\n");
+ else
+ av_log(NULL, AV_LOG_ERROR, "decompression OK\n");
+ return 0;
+}
+#endif