Change all uses of restrict to use av_restrict instead.

Defining restrict results - for some compilers - in changing other
uses of the restrict keyword also, e.g. __declspec(restrict) gets
changed to __declspec(__restrict) on MSVC. This causes compilation
failures. Therefore, using a private namespace macro instead is
more reliable and robust.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -3797,7 +3797,7 @@ cat > $TMPH <<EOF
 #define AVCONV_DATADIR "$(eval c_escape $datadir)"
 #define CC_TYPE "$cc_type"
 #define CC_VERSION $cc_version
-#define restrict $_restrict
+#define av_restrict $_restrict
 #define EXTERN_PREFIX "${extern_prefix}"
 #define EXTERN_ASM ${extern_prefix}
 #define SLIBSUF "$SLIBSUF"

libavcodec/dsputil.c

@@ -2517,7 +2517,7 @@ static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
         dst[i] += src[i] * mul;
 }
 
-static void butterflies_float_c(float *restrict v1, float *restrict v2,
+static void butterflies_float_c(float *av_restrict v1, float *av_restrict v2,
                                 int len)
 {
     int i;

libavcodec/dsputil.h

@@ -444,7 +444,7 @@ typedef struct DSPContext {
      * @param v2  second input vector, difference output, 16-byte aligned
      * @param len length of vectors, multiple of 4
      */
-    void (*butterflies_float)(float *restrict v1, float *restrict v2, int len);
+    void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len);
 
     /**
      * Calculate the sum and difference of two vectors of floats and interleave

libavcodec/ituh263dec.c

@@ -210,7 +210,7 @@ static int h263_decode_gob_header(MpegEncContext *s)
  * @param end pointer to the end of the buffer
  * @return pointer to the next resync_marker, or end if none was found
  */
-const uint8_t *ff_h263_find_resync_marker(const uint8_t *restrict p, const uint8_t * restrict end)
+const uint8_t *ff_h263_find_resync_marker(const uint8_t *av_restrict p, const uint8_t *av_restrict end)
 {
     assert(p < end);
 

libavcodec/mpegvideo.c

@@ -140,9 +140,9 @@ const enum PixelFormat ff_hwaccel_pixfmt_list_420[] = {
     PIX_FMT_NONE
 };
 
-const uint8_t *avpriv_mpv_find_start_code(const uint8_t *restrict p,
+const uint8_t *avpriv_mpv_find_start_code(const uint8_t *av_restrict p,
                                           const uint8_t *end,
-                                          uint32_t * restrict state)
+                                          uint32_t *av_restrict state)
 {
     int i;
 

libavformat/rtpenc.h

@@ -86,7 +86,7 @@ void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size);
 void ff_rtp_send_xiph(AVFormatContext *s1, const uint8_t *buff, int size);
 void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buff, int size);
 
-const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *restrict start,
-                                                  const uint8_t *restrict end);
+const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *av_restrict start,
+                                                  const uint8_t *av_restrict end);
 
 #endif /* AVFORMAT_RTPENC_H */

libavformat/rtpenc_h263.c

@@ -23,8 +23,8 @@
 #include "avformat.h"
 #include "rtpenc.h"
 
-const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *restrict start,
-                                                  const uint8_t *restrict end)
+const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *av_restrict start,
+                                                  const uint8_t *av_restrict end)
 {
     const uint8_t *p = end - 1;
     start += 1; /* Make sure we never return the original start. */