diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index ae184d7b5f6ebdec1b36704fba7fabd054ecffa1..1598f47c6c314a7dce0e2598cbd83560d30190de 100644
--- a/libavcodec/dfa.c
+++ b/libavcodec/dfa.c
@@ -24,7 +24,7 @@
#include "bytestream.h"
#include "libavutil/imgutils.h"
-#include "libavutil/lzo.h" // for av_memcpy_backptr
+#include "libavutil/mem.h"
typedef struct DfaContext {
AVFrame pic;
diff --git a/libavcodec/eatgv.c b/libavcodec/eatgv.c
index 404238b6ef34ce9d37ceef463e270f5dfe810833..170eeb10d54cae8b4d01039df070159b71bdcb0a 100644
--- a/libavcodec/eatgv.c
+++ b/libavcodec/eatgv.c
@@ -31,8 +31,8 @@
#include "avcodec.h"
#define BITSTREAM_READER_LE
#include "get_bits.h"
-#include "libavutil/lzo.h"
#include "libavutil/imgutils.h"
+#include "libavutil/mem.h"
#define EA_PREAMBLE_SIZE 8
#define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
diff --git a/libavcodec/g723_1.c b/libavcodec/g723_1.c
index 5c213da64cfac30fb28f1e2caf98c5a62adc34d5..342c63473dfab565593dfc0b4dbb616af2caa0b2 100644
--- a/libavcodec/g723_1.c
+++ b/libavcodec/g723_1.c
@@ -27,7 +27,7 @@
#define BITSTREAM_READER_LE
#include "libavutil/audioconvert.h"
-#include "libavutil/lzo.h"
+#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "get_bits.h"
diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c
index 6b101ae6d1b69c4c454012c1480753c486821a74..c80d0fe30e80acf90fc9d6df4a779126a8806df3 100644
--- a/libavcodec/lcldec.c
+++ b/libavcodec/lcldec.c
@@ -41,10 +41,10 @@
#include <stdio.h>
#include <stdlib.h>
+#include "libavutil/mem.h"
#include "avcodec.h"
#include "bytestream.h"
#include "lcl.h"
-#include "libavutil/lzo.h"
#if CONFIG_ZLIB_DECODER
#include <zlib.h>
diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 63caad2440cfc91aae70247b334f3c7f81d859d8..466d1ec495321cf798654f57352b233b6a652f66 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -29,6 +29,7 @@
#include <math.h>
+#include "libavutil/mem.h"
#include "dsputil.h"
#include "avcodec.h"
#include "get_bits.h"
@@ -38,7 +39,6 @@
#include "acelp_vectors.h"
#include "acelp_filters.h"
#include "lsp.h"
-#include "libavutil/lzo.h"
#include "dct.h"
#include "rdft.h"
#include "sinewin.h"
diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index 586320b55ef73445e2051cc34f430ba95339075c..e6bfc0da068bc604fba5f17d49c8d1c32f0bea2a 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -33,12 +33,11 @@
#include <string.h>
#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
#include "avcodec.h"
#include "bytestream.h"
#define BITSTREAM_READER_LE
#include "get_bits.h"
-// for av_memcpy_backptr
-#include "libavutil/lzo.h"
#define RUNTIME_GAMMA 0
diff --git a/libavcodec/xxan.c b/libavcodec/xxan.c
index b06d314d0f1363c26d5e2b28dc49b112d5476f9a..2a5a8ca6312e647af2446d167e4201aadc7e3f25 100644
--- a/libavcodec/xxan.c
+++ b/libavcodec/xxan.c
@@ -22,11 +22,10 @@
#include "avcodec.h"
#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
#include "bytestream.h"
#define BITSTREAM_READER_LE
#include "get_bits.h"
-// for av_memcpy_backptr
-#include "libavutil/lzo.h"
typedef struct XanContext {
AVCodecContext *avctx;
diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index c17d32f3625dc488d037073d6e28f03eec58040e..eff3cd2333cbfb990892da28b0a512f6390ce12d 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -100,8 +100,6 @@ static inline void copy(LZOContext *c, int cnt)
c->out = dst + cnt;
}
-static inline void memcpy_backptr(uint8_t *dst, int back, int cnt);
-
/**
* @brief Copies previously decoded bytes to current position.
* @param back how many bytes back we start
@@ -122,50 +120,10 @@ static inline void copy_backptr(LZOContext *c, int back, int cnt)
cnt = FFMAX(c->out_end - dst, 0);
c->error |= AV_LZO_OUTPUT_FULL;
}
- memcpy_backptr(dst, back, cnt);
+ av_memcpy_backptr(dst, back, cnt);
c->out = dst + cnt;
}
-static inline void memcpy_backptr(uint8_t *dst, int back, int cnt)
-{
- const uint8_t *src = &dst[-back];
- if (back == 1) {
- memset(dst, *src, cnt);
- } else {
- if (cnt >= 4) {
- AV_COPY16U(dst, src);
- AV_COPY16U(dst + 2, src + 2);
- src += 4;
- dst += 4;
- cnt -= 4;
- }
- if (cnt >= 8) {
- AV_COPY16U(dst, src);
- AV_COPY16U(dst + 2, src + 2);
- AV_COPY16U(dst + 4, src + 4);
- AV_COPY16U(dst + 6, src + 6);
- src += 8;
- dst += 8;
- cnt -= 8;
- }
- if (cnt > 0) {
- int blocklen = back;
- while (cnt > blocklen) {
- memcpy(dst, src, blocklen);
- dst += blocklen;
- cnt -= blocklen;
- blocklen <<= 1;
- }
- memcpy(dst, src, cnt);
- }
- }
-}
-
-void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
-{
- memcpy_backptr(dst, back, cnt);
-}
-
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
{
int state = 0;
diff --git a/libavutil/lzo.h b/libavutil/lzo.h
index a84b9bd15db12dd154bce56e59815e2637d91d67..9d7e8f1dc10a6d57a63e038bebd133b3069ea18b 100644
--- a/libavutil/lzo.h
+++ b/libavutil/lzo.h
@@ -59,17 +59,6 @@
*/
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
-/**
- * @brief deliberately overlapping memcpy implementation
- * @param dst destination buffer
- * @param back how many bytes back we start (the initial size of the overlapping window)
- * @param cnt number of bytes to copy, must be >= 0
- *
- * cnt > back is valid, this will copy the bytes we just copied,
- * thus creating a repeating pattern with a period length of back.
- */
-void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
-
/**
* @}
*/
diff --git a/libavutil/mem.c b/libavutil/mem.c
index 16c1adb014f28657a3b91b1b2acacaa7f5e67b3f..feba3163b04fd89a3224c520ad9a6aaad51f2e28 100644
--- a/libavutil/mem.c
+++ b/libavutil/mem.c
@@ -27,6 +27,7 @@
#include "config.h"
#include <limits.h>
+#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_MALLOC_H
@@ -34,6 +35,7 @@
#endif
#include "avutil.h"
+#include "intreadwrite.h"
#include "mem.h"
/* here we can use OS-dependent allocation functions */
@@ -177,3 +179,38 @@ char *av_strdup(const char *s)
}
return ptr;
}
+
+void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
+{
+ const uint8_t *src = &dst[-back];
+ if (back == 1) {
+ memset(dst, *src, cnt);
+ } else {
+ if (cnt >= 4) {
+ AV_COPY16U(dst, src);
+ AV_COPY16U(dst + 2, src + 2);
+ src += 4;
+ dst += 4;
+ cnt -= 4;
+ }
+ if (cnt >= 8) {
+ AV_COPY16U(dst, src);
+ AV_COPY16U(dst + 2, src + 2);
+ AV_COPY16U(dst + 4, src + 4);
+ AV_COPY16U(dst + 6, src + 6);
+ src += 8;
+ dst += 8;
+ cnt -= 8;
+ }
+ if (cnt > 0) {
+ int blocklen = back;
+ while (cnt > blocklen) {
+ memcpy(dst, src, blocklen);
+ dst += blocklen;
+ cnt -= blocklen;
+ blocklen <<= 1;
+ }
+ memcpy(dst, src, cnt);
+ }
+ }
+}
diff --git a/libavutil/mem.h b/libavutil/mem.h
index 4f14f27a91ec932b1f93df3806ccff36d93f9249..8f4722447d396be39a44f7d6e4ce80b4cc913b45 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -27,6 +27,7 @@
#define AVUTIL_MEM_H
#include <limits.h>
+#include <stdint.h>
#include "attributes.h"
#include "avutil.h"
@@ -164,6 +165,17 @@ char *av_strdup(const char *s) av_malloc_attrib;
*/
void av_freep(void *ptr);
+/**
+ * @brief deliberately overlapping memcpy implementation
+ * @param dst destination buffer
+ * @param back how many bytes back we start (the initial size of the overlapping window)
+ * @param cnt number of bytes to copy, must be >= 0
+ *
+ * cnt > back is valid, this will copy the bytes we just copied,
+ * thus creating a repeating pattern with a period length of back.
+ */
+void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
+
/**
* @}
*/