@@ -33,16 +33,16 @@ typedef struct {

     int chroma_r;  ///< blur radius for the chroma planes

     uint16_t *buf; ///< holds image data for blur algorithm passed into filter.

     /// DSP functions.

-    void (*filter_line) (uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);

-    void (*blur_line) (uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width);

+    void (*filter_line) (uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

+    void (*blur_line) (uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

 } GradFunContext;

-void ff_gradfun_filter_line_c(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);

-void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width);

+void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

+void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

-void ff_gradfun_filter_line_mmx2(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);

-void ff_gradfun_filter_line_ssse3(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers);

+void ff_gradfun_filter_line_mmx2(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

+void ff_gradfun_filter_line_ssse3(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers);

-void ff_gradfun_blur_line_sse2(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width);

+void ff_gradfun_blur_line_sse2(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width);

 #endif /* AVFILTER_GRADFUN_H */

@@ -49,7 +49,7 @@ DECLARE_ALIGNED(16, static const uint16_t, dither)[8][8] = {

     {0x54,0x34,0x4C,0x2C,0x52,0x32,0x4A,0x2A},

 };

-void ff_gradfun_filter_line_c(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers)

+void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)

 {

     int x;

     for (x = 0; x < width; x++, dc += x & 1) {

@@ -63,7 +63,7 @@ void ff_gradfun_filter_line_c(uint8_t *dst, uint8_t *src, uint16_t *dc, int widt

     }

 }

-void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width)

+void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width)

 {

     int x, v, old;

     for (x = 0; x < width; x++) {

@@ -74,7 +74,7 @@ void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t

     }

 }

-static void filter(GradFunContext *ctx, uint8_t *dst, uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r)

+static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r)

 {

     int bstride = FFALIGN(width, 16) / 2;

     int y;

@@ -63,7 +63,7 @@ typedef struct {

     FilterParam chroma; ///< chroma parameters (width, height, amount)

 } UnsharpContext;

-static void unsharpen(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride, int width, int height, FilterParam *fp)

+static void unsharpen(uint8_t *dst, const uint8_t *src, int dst_stride, int src_stride, int width, int height, FilterParam *fp)

 {

     uint32_t **sc = fp->sc;

     uint32_t sr[(MAX_SIZE * MAX_SIZE) - 1], tmp1, tmp2;

@@ -96,7 +96,7 @@ static void unsharpen(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride

                 tmp1 = sc[z + 1][x + fp->steps_x] + tmp2; sc[z + 1][x + fp->steps_x] = tmp2;

             }

             if (x >= fp->steps_x && y >= fp->steps_y) {

-                uint8_t* srx = src - fp->steps_y * src_stride + x - fp->steps_x;

+                const uint8_t* srx = src - fp->steps_y * src_stride + x - fp->steps_x;

                 uint8_t* dsx = dst - fp->steps_y * dst_stride + x - fp->steps_x;

                 res = (int32_t)*srx + ((((int32_t) * srx - (int32_t)((tmp1 + fp->halfscale) >> fp->scalebits)) * fp->amount) >> 16);

@@ -23,7 +23,7 @@

 DECLARE_ALIGNED(16, static const uint16_t, pw_7f)[8] = {0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F};

 DECLARE_ALIGNED(16, static const uint16_t, pw_ff)[8] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};

-void ff_gradfun_filter_line_mmx2(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers)

+void ff_gradfun_filter_line_mmx2(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)

 {

 #if HAVE_MMX

     intptr_t x;

@@ -71,7 +71,7 @@ void ff_gradfun_filter_line_mmx2(uint8_t *dst, uint8_t *src, uint16_t *dc, int w

 #endif

 }

-void ff_gradfun_filter_line_ssse3(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers)

+void ff_gradfun_filter_line_ssse3(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)

 {

 #if HAVE_SSSE3

     intptr_t x;

@@ -118,7 +118,7 @@ void ff_gradfun_filter_line_ssse3(uint8_t *dst, uint8_t *src, uint16_t *dc, int

 #endif // HAVE_SSSE3

 }

-void ff_gradfun_blur_line_sse2(uint16_t *dc, uint16_t *buf, uint16_t *buf1, uint8_t *src, int src_linesize, int width)

+void ff_gradfun_blur_line_sse2(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width)

 {

 #if HAVE_SSE

 #define BLURV(load)\

@@ -152,7 +152,7 @@ static int send_command_packet(MMSTContext *mmst)

     return 0;

 }

-static void mms_put_utf16(MMSContext *mms, uint8_t *src)

+static void mms_put_utf16(MMSContext *mms, const uint8_t *src)

 {

     AVIOContext bic;

     int size = mms->write_out_ptr - mms->out_buffer;

@@ -1689,13 +1689,13 @@ static void mov_build_index(MOVContext *mov, AVStream *st)

     }

 }

-static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)

+static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref)

 {

     /* try relative path, we do not try the absolute because it can leak information about our

        system to an attacker */

     if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {

         char filename[1024];

-        char *src_path;

+        const char *src_path;

         int i, l;

         /* find a source dir */