The function is used elsewhere and does not belong with the LZO code.
---
libavcodec/dfa.c | 2 +-
libavcodec/eatgv.c | 2 +-
libavcodec/g723_1.c | 2 +-
libavcodec/lcldec.c | 2 +-
libavcodec/wmavoice.c | 2 +-
libavcodec/xan.c | 3 +--
libavcodec/xxan.c | 3 +--
libavutil/lzo.c | 45 ++-------------------------------------------
libavutil/lzo.h | 16 ++--------------
libavutil/mem.c | 40 ++++++++++++++++++++++++++++++++++++++++
libavutil/mem.h | 15 +++++++++++++++
11 files changed, 66 insertions(+), 66 deletions(-)
diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c
index 8ec97dc..b340ade 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 97abf06..4119538 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 3d4fa46..cfdfd0f 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 c539e6c..a919291 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 63caad2..466d1ec 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 586320b..e6bfc0d 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 b06d314..2a5a8ca 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 101d4f4..a3d9593 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <stdint.h>
#include <string.h>
#include "avutil.h"
@@ -100,8 +101,6 @@ 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 +121,10 @@ 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 {
-#ifdef OUTBUF_PADDED
- AV_COPY16U(dst, src);
- AV_COPY16U(dst + 2, src + 2);
- src += 4;
- dst += 4;
- cnt -= 4;
- if (cnt > 0) {
- 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;
- }
-#endif
- 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 0992334..e676afa 100644
--- a/libavutil/lzo.h
+++ b/libavutil/lzo.h
@@ -31,6 +31,8 @@
#include <stdint.h>
+#include "mem.h"
+
/** @name Error flags returned by av_lzo1x_decode
* @{ */
/// end of the input buffer reached before decoding finished
@@ -43,9 +45,6 @@
#define AV_LZO_ERROR 8
/** @} */
-/// Amount of bytes av_memcpy_backptr() can write past the output buffer.
-#define AV_MEMCPY_BACKPTR_OUTPUT_PADDING 12
-
/// Output padding required due to internal use of av_memcpy_backptr().
#define AV_LZO_OUTPUT_PADDING AV_MEMCPY_BACKPTR_OUTPUT_PADDING
@@ -63,17 +62,6 @@
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen);
/**
- * @brief deliberately overlapping memcpy implementation
- * @param dst destination buffer; must be padded with 12 additional bytes
- * @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 16c1adb..40290d8 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 +179,41 @@ char *av_strdup(const char *s)
}
return ptr;
}
+
+// Define if we may write up to 12 bytes beyond the output buffer.
+#define OUTBUF_PADDED 1
+
+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 {
+#ifdef OUTBUF_PADDED
+ AV_COPY16U(dst, src);
+ AV_COPY16U(dst + 2, src + 2);
+ src += 4;
+ dst += 4;
+ cnt -= 4;
+ if (cnt > 0) {
+ 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;
+ }
+#endif
+ 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 4f14f27..493623b 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 +165,20 @@ char *av_strdup(const char *s) av_malloc_attrib;
*/
void av_freep(void *ptr);
+/// Amount of bytes av_memcpy_backptr() can write past the output buffer.
+#define AV_MEMCPY_BACKPTR_OUTPUT_PADDING 12
+
+/**
+ * @brief deliberately overlapping memcpy implementation
+ * @param dst destination buffer; must be padded with 12 additional bytes
+ * @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);
+
/**
* @}
*/
--
1.7.1
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