diff --git a/doc/optimization.txt b/doc/optimization.txt
index b4b0a064c3..c39e1e37b9 100644
--- a/doc/optimization.txt
+++ b/doc/optimization.txt
@@ -142,7 +142,7 @@ Alignment:
 Some instructions on some architectures have strict alignment restrictions,
 for example most SSE/SSE2 instructions on x86.
 The minimum guaranteed alignment is written in the .h files, for example:
-    void (*put_pixels_clamped)(const int16_t *block/*align 16*/, UINT8 *pixels/*align 8*/, int line_size);
+    void (*put_pixels_clamped)(const int16_t *block/*align 16*/, uint8_t *pixels/*align 8*/, ptrdiff_t stride);
 
 
 General Tips:
diff --git a/libavcodec/aarch64/idct.h b/libavcodec/aarch64/idct.h
index 05699c2286..5c49046148 100644
--- a/libavcodec/aarch64/idct.h
+++ b/libavcodec/aarch64/idct.h
@@ -22,7 +22,7 @@
 #include <stdint.h>
 
 void ff_simple_idct_neon(int16_t *data);
-void ff_simple_idct_put_neon(uint8_t *dest, int line_size, int16_t *data);
-void ff_simple_idct_add_neon(uint8_t *dest, int line_size, int16_t *data);
+void ff_simple_idct_put_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
+void ff_simple_idct_add_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
 
 #endif /* AVCODEC_AARCH64_IDCT_H */
diff --git a/libavcodec/alpha/idctdsp_alpha.h b/libavcodec/alpha/idctdsp_alpha.h
index bf984950f2..8cc969d7de 100644
--- a/libavcodec/alpha/idctdsp_alpha.h
+++ b/libavcodec/alpha/idctdsp_alpha.h
@@ -28,7 +28,7 @@ extern void (*add_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels,
                                         ptrdiff_t line_size);
 
 void ff_simple_idct_axp(int16_t *block);
-void ff_simple_idct_put_axp(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct_add_axp(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct_put_axp(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_add_axp(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 #endif /* AVCODEC_ALPHA_IDCTDSP_ALPHA_H */
diff --git a/libavcodec/alpha/simple_idct_alpha.c b/libavcodec/alpha/simple_idct_alpha.c
index 04be0cef06..6e377ef243 100644
--- a/libavcodec/alpha/simple_idct_alpha.c
+++ b/libavcodec/alpha/simple_idct_alpha.c
@@ -290,13 +290,13 @@ void ff_simple_idct_axp(int16_t *block)
     }
 }
 
-void ff_simple_idct_put_axp(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct_put_axp(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_simple_idct_axp(block);
     put_pixels_clamped_axp_p(block, dest, line_size);
 }
 
-void ff_simple_idct_add_axp(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct_add_axp(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_simple_idct_axp(block);
     add_pixels_clamped_axp_p(block, dest, line_size);
diff --git a/libavcodec/arm/idct.h b/libavcodec/arm/idct.h
index 39cef3a874..6c79a69c5f 100644
--- a/libavcodec/arm/idct.h
+++ b/libavcodec/arm/idct.h
@@ -19,6 +19,7 @@
 #ifndef AVCODEC_ARM_IDCT_H
 #define AVCODEC_ARM_IDCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 void ff_j_rev_dct_arm(int16_t *data);
@@ -26,15 +27,15 @@ void ff_j_rev_dct_arm(int16_t *data);
 void ff_simple_idct_arm(int16_t *data);
 
 void ff_simple_idct_armv5te(int16_t *data);
-void ff_simple_idct_put_armv5te(uint8_t *dest, int line_size, int16_t *data);
-void ff_simple_idct_add_armv5te(uint8_t *dest, int line_size, int16_t *data);
+void ff_simple_idct_put_armv5te(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
+void ff_simple_idct_add_armv5te(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
 
 void ff_simple_idct_armv6(int16_t *data);
-void ff_simple_idct_put_armv6(uint8_t *dest, int line_size, int16_t *data);
-void ff_simple_idct_add_armv6(uint8_t *dest, int line_size, int16_t *data);
+void ff_simple_idct_put_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
+void ff_simple_idct_add_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
 
 void ff_simple_idct_neon(int16_t *data);
-void ff_simple_idct_put_neon(uint8_t *dest, int line_size, int16_t *data);
-void ff_simple_idct_add_neon(uint8_t *dest, int line_size, int16_t *data);
+void ff_simple_idct_put_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
+void ff_simple_idct_add_neon(uint8_t *dest, ptrdiff_t line_size, int16_t *data);
 
 #endif /* AVCODEC_ARM_IDCT_H */
diff --git a/libavcodec/arm/idctdsp_init_arm.c b/libavcodec/arm/idctdsp_init_arm.c
index 0068e3f86c..43782b238a 100644
--- a/libavcodec/arm/idctdsp_init_arm.c
+++ b/libavcodec/arm/idctdsp_init_arm.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include "libavutil/attributes.h"
@@ -34,25 +35,29 @@ void ff_add_pixels_clamped_arm(const int16_t *block, uint8_t *dest,
 
 /* XXX: those functions should be suppressed ASAP when all IDCTs are
  * converted */
-static void j_rev_dct_arm_put(uint8_t *dest, int line_size, int16_t *block)
+static void j_rev_dct_arm_put(uint8_t *dest, ptrdiff_t line_size,
+                              int16_t *block)
 {
     ff_j_rev_dct_arm(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-static void j_rev_dct_arm_add(uint8_t *dest, int line_size, int16_t *block)
+static void j_rev_dct_arm_add(uint8_t *dest, ptrdiff_t line_size,
+                              int16_t *block)
 {
     ff_j_rev_dct_arm(block);
     ff_add_pixels_clamped(block, dest, line_size);
 }
 
-static void simple_idct_arm_put(uint8_t *dest, int line_size, int16_t *block)
+static void simple_idct_arm_put(uint8_t *dest, ptrdiff_t line_size,
+                                int16_t *block)
 {
     ff_simple_idct_arm(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-static void simple_idct_arm_add(uint8_t *dest, int line_size, int16_t *block)
+static void simple_idct_arm_add(uint8_t *dest, ptrdiff_t line_size,
+                                int16_t *block)
 {
     ff_simple_idct_arm(block);
     ff_add_pixels_clamped(block, dest, line_size);
diff --git a/libavcodec/arm/simple_idct_armv6.S b/libavcodec/arm/simple_idct_armv6.S
index 79cf5d41fb..f95c20d295 100644
--- a/libavcodec/arm/simple_idct_armv6.S
+++ b/libavcodec/arm/simple_idct_armv6.S
@@ -390,7 +390,7 @@ function ff_simple_idct_armv6, export=1
         pop    {r4-r11, pc}
 endfunc
 
-/* ff_simple_idct_add_armv6(uint8_t *dest, int line_size, int16_t *data); */
+/* ff_simple_idct_add_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data); */
 function ff_simple_idct_add_armv6, export=1
         push   {r0, r1, r4-r11, lr}
         sub    sp, sp, #128
@@ -407,7 +407,7 @@ function ff_simple_idct_add_armv6, export=1
         pop    {r4-r11, pc}
 endfunc
 
-/* ff_simple_idct_put_armv6(uint8_t *dest, int line_size, int16_t *data); */
+/* ff_simple_idct_put_armv6(uint8_t *dest, ptrdiff_t line_size, int16_t *data); */
 function ff_simple_idct_put_armv6, export=1
         push   {r0, r1, r4-r11, lr}
         sub    sp, sp, #128
diff --git a/libavcodec/arm/simple_idct_neon.S b/libavcodec/arm/simple_idct_neon.S
index c3e573c00a..726d4cbefa 100644
--- a/libavcodec/arm/simple_idct_neon.S
+++ b/libavcodec/arm/simple_idct_neon.S
@@ -261,7 +261,7 @@ endconst
         pop             {r4-r7, pc}
         .endm
 
-/* void ff_simple_idct_put_neon(uint8_t *dst, int line_size, int16_t *data); */
+/* void ff_simple_idct_put_neon(uint8_t *dst, ptrdiff_t line_size, int16_t *data); */
 function ff_simple_idct_put_neon, export=1
         idct_start      r2
 
@@ -316,7 +316,7 @@ function idct_col4_add8_neon
         bx              lr
 endfunc
 
-/* void ff_simple_idct_add_neon(uint8_t *dst, int line_size, int16_t *data); */
+/* void ff_simple_idct_add_neon(uint8_t *dst, ptrdiff_t line_size, int16_t *data); */
 function ff_simple_idct_add_neon, export=1
         idct_start      r2
 
diff --git a/libavcodec/arm/vc1dsp_init_neon.c b/libavcodec/arm/vc1dsp_init_neon.c
index bb873e687e..c3401441eb 100644
--- a/libavcodec/arm/vc1dsp_init_neon.c
+++ b/libavcodec/arm/vc1dsp_init_neon.c
@@ -25,14 +25,14 @@
 #include "config.h"
 
 void ff_vc1_inv_trans_8x8_neon(int16_t *block);
-void ff_vc1_inv_trans_4x8_neon(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_8x4_neon(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x4_neon(uint8_t *dest, int linesize, int16_t *block);
+void ff_vc1_inv_trans_4x8_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_vc1_inv_trans_8x4_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_vc1_inv_trans_4x4_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
 
-void ff_vc1_inv_trans_8x8_dc_neon(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x8_dc_neon(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_8x4_dc_neon(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x4_dc_neon(uint8_t *dest, int linesize, int16_t *block);
+void ff_vc1_inv_trans_8x8_dc_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_vc1_inv_trans_4x8_dc_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_vc1_inv_trans_8x4_dc_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_vc1_inv_trans_4x4_dc_neon(uint8_t *dest, ptrdiff_t stride, int16_t *block);
 
 void ff_put_pixels8x8_neon(uint8_t *block, const uint8_t *pixels,
                            ptrdiff_t line_size, int rnd);
diff --git a/libavcodec/arm/vc1dsp_neon.S b/libavcodec/arm/vc1dsp_neon.S
index c4f4db9c8e..611cbf2234 100644
--- a/libavcodec/arm/vc1dsp_neon.S
+++ b/libavcodec/arm/vc1dsp_neon.S
@@ -426,7 +426,7 @@ function ff_vc1_inv_trans_8x8_neon, export=1
         bx              lr
 endfunc
 
-@ (uint8_t *dest [r0], int linesize [r1], int16_t *block [r2])
+@ (uint8_t *dest [r0], ptrdiff_t stride [r1], int16_t *block [r2])
 function ff_vc1_inv_trans_8x4_neon, export=1
         vld1.64         {q0-q1}, [r2,:128]!     @ load 8 * 4 * 2 = 64 bytes / 16 bytes per quad = 4 quad registers
         vld1.64         {q2-q3}, [r2,:128]
@@ -511,7 +511,7 @@ function ff_vc1_inv_trans_8x4_neon, export=1
         bx              lr
 endfunc
 
-@ (uint8_t *dest [r0], int linesize [r1], int16_t *block [r2])
+@ (uint8_t *dest [r0], ptrdiff_t stride [r1], int16_t *block [r2])
 function ff_vc1_inv_trans_4x8_neon, export=1
         mov             r12, #(8 * 2)  @ 8 elements per line, each element 2 bytes
         vld4.16         {d0[],  d2[],  d4[],  d6[]},  [r2,:64], r12     @ read each column into a q register
@@ -593,7 +593,7 @@ endfunc
         vshr.s16        q1,  q1,  #\rshift      @ dst[3,1] >>= rshift
 .endm
 
-@ (uint8_t *dest [r0], int linesize [r1], int16_t *block [r2])
+@ (uint8_t *dest [r0], ptrdiff_t stride [r1], int16_t *block [r2])
 function ff_vc1_inv_trans_4x4_neon, export=1
         mov             r12, #(8 * 2)  @ 8 elements per line, each element 2 bytes
         vld4.16         {d0[],  d1[],  d2[],  d3[]},  [r2,:64], r12     @ read each column into a register
diff --git a/libavcodec/dct.h b/libavcodec/dct.h
index 05297ba9db..0a03e256d1 100644
--- a/libavcodec/dct.h
+++ b/libavcodec/dct.h
@@ -24,6 +24,7 @@
 #if !defined(AVCODEC_DCT_H) && (!defined(FFT_FLOAT) || FFT_FLOAT)
 #define AVCODEC_DCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include "rdft.h"
@@ -62,7 +63,7 @@ void ff_j_rev_dct(int16_t *data);
 void ff_j_rev_dct4(int16_t *data);
 void ff_j_rev_dct2(int16_t *data);
 void ff_j_rev_dct1(int16_t *data);
-void ff_jref_idct_put(uint8_t *dest, int line_size, int16_t *block);
-void ff_jref_idct_add(uint8_t *dest, int line_size, int16_t *block);
+void ff_jref_idct_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_jref_idct_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 #endif /* AVCODEC_DCT_H */
diff --git a/libavcodec/dv.h b/libavcodec/dv.h
index d5482d1aa6..6350a16dff 100644
--- a/libavcodec/dv.h
+++ b/libavcodec/dv.h
@@ -47,7 +47,7 @@ typedef struct DVVideoContext {
 
     void (*get_pixels)(int16_t *block, const uint8_t *pixels, ptrdiff_t linesize);
     void (*fdct[2])(int16_t *block);
-    void (*idct_put[2])(uint8_t *dest, int line_size, int16_t *block);
+    void (*idct_put[2])(uint8_t *dest, ptrdiff_t stride, int16_t *block);
     me_cmp_func ildct_cmp;
     DVwork_chunk work_chunks[4 * 12 * 27];
     uint32_t idct_factor[2 * 4 * 16 * 64];
diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
index 0b4c1bc287..d71a660f9d 100644
--- a/libavcodec/dvdec.c
+++ b/libavcodec/dvdec.c
@@ -54,7 +54,7 @@ typedef struct BlockInfo {
     const uint32_t *factor_table;
     const uint8_t *scan_table;
     uint8_t pos; /* position in block */
-    void (*idct_put)(uint8_t *dest, int line_size, int16_t *block);
+    void (*idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
     uint8_t partial_bit_count;
     uint32_t partial_bit_buffer;
     int shift_offset;
diff --git a/libavcodec/faanidct.c b/libavcodec/faanidct.c
index 2aab726850..3921f82dae 100644
--- a/libavcodec/faanidct.c
+++ b/libavcodec/faanidct.c
@@ -47,7 +47,9 @@ B6*B0/8, B6*B1/8, B6*B2/8, B6*B3/8, B6*B4/8, B6*B5/8, B6*B6/8, B6*B7/8,
 B7*B0/8, B7*B1/8, B7*B2/8, B7*B3/8, B7*B4/8, B7*B5/8, B7*B6/8, B7*B7/8,
 };
 
-static inline void p8idct(int16_t data[64], FLOAT temp[64], uint8_t *dest, int stride, int x, int y, int type){
+static inline void p8idct(int16_t data[64], FLOAT temp[64], uint8_t *dest,
+                          ptrdiff_t stride, int x, int y, int type)
+{
     int i;
     FLOAT s04, d04, s17, d17, s26, d26, s53, d53;
     FLOAT os07, os16, os25, os34;
@@ -135,7 +137,8 @@ void ff_faanidct(int16_t block[64]){
     p8idct(block, temp, NULL, 0, 8, 1, 1);
 }
 
-void ff_faanidct_add(uint8_t *dest, int line_size, int16_t block[64]){
+void ff_faanidct_add(uint8_t *dest, ptrdiff_t line_size, int16_t block[64])
+{
     FLOAT temp[64];
     int i;
 
@@ -148,7 +151,8 @@ void ff_faanidct_add(uint8_t *dest, int line_size, int16_t block[64]){
     p8idct(NULL , temp, dest, line_size, 8, 1, 2);
 }
 
-void ff_faanidct_put(uint8_t *dest, int line_size, int16_t block[64]){
+void ff_faanidct_put(uint8_t *dest, ptrdiff_t line_size, int16_t block[64])
+{
     FLOAT temp[64];
     int i;
 
diff --git a/libavcodec/faanidct.h b/libavcodec/faanidct.h
index 4cd2c7858f..6f4da67c1b 100644
--- a/libavcodec/faanidct.h
+++ b/libavcodec/faanidct.h
@@ -22,10 +22,11 @@
 #ifndef AVCODEC_FAANIDCT_H
 #define AVCODEC_FAANIDCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 void ff_faanidct(int16_t block[64]);
-void ff_faanidct_add(uint8_t *dest, int line_size, int16_t block[64]);
-void ff_faanidct_put(uint8_t *dest, int line_size, int16_t block[64]);
+void ff_faanidct_add(uint8_t *dest, ptrdiff_t line_size, int16_t block[64]);
+void ff_faanidct_put(uint8_t *dest, ptrdiff_t line_size, int16_t block[64]);
 
 #endif /* AVCODEC_FAANIDCT_H */
diff --git a/libavcodec/idctdsp.c b/libavcodec/idctdsp.c
index 37f4640f0d..84dd6457bd 100644
--- a/libavcodec/idctdsp.c
+++ b/libavcodec/idctdsp.c
@@ -207,33 +207,33 @@ static void add_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pix
     }
 }
 
-static void ff_jref_idct4_put(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct4_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct4 (block);
     put_pixels_clamped4_c(block, dest, line_size);
 }
-static void ff_jref_idct4_add(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct4_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct4 (block);
     add_pixels_clamped4_c(block, dest, line_size);
 }
 
-static void ff_jref_idct2_put(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct2_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct2 (block);
     put_pixels_clamped2_c(block, dest, line_size);
 }
-static void ff_jref_idct2_add(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct2_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct2 (block);
     add_pixels_clamped2_c(block, dest, line_size);
 }
 
-static void ff_jref_idct1_put(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct1_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     dest[0] = av_clip_uint8((block[0] + 4)>>3);
 }
-static void ff_jref_idct1_add(uint8_t *dest, int line_size, int16_t *block)
+static void ff_jref_idct1_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3));
 }
diff --git a/libavcodec/idctdsp.h b/libavcodec/idctdsp.h
index e449be310f..abfa587218 100644
--- a/libavcodec/idctdsp.h
+++ b/libavcodec/idctdsp.h
@@ -68,14 +68,14 @@ typedef struct IDCTDSPContext {
      * @param line_size size in bytes of a horizontal line of dest
      */
     void (*idct_put)(uint8_t *dest /* align 8 */,
-                     int line_size, int16_t *block /* align 16 */);
+                     ptrdiff_t line_size, int16_t *block /* align 16 */);
 
     /**
      * block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
      * @param line_size size in bytes of a horizontal line of dest
      */
     void (*idct_add)(uint8_t *dest /* align 8 */,
-                     int line_size, int16_t *block /* align 16 */);
+                     ptrdiff_t line_size, int16_t *block /* align 16 */);
 
     /**
      * IDCT input permutation.
diff --git a/libavcodec/jrevdct.c b/libavcodec/jrevdct.c
index 55a7392e98..89dd9f2fca 100644
--- a/libavcodec/jrevdct.c
+++ b/libavcodec/jrevdct.c
@@ -1156,13 +1156,13 @@ void ff_j_rev_dct1(DCTBLOCK data){
 #undef FIX
 #undef CONST_BITS
 
-void ff_jref_idct_put(uint8_t *dest, int line_size, int16_t *block)
+void ff_jref_idct_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-void ff_jref_idct_add(uint8_t *dest, int line_size, int16_t *block)
+void ff_jref_idct_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_j_rev_dct(block);
     ff_add_pixels_clamped(block, dest, line_size);
diff --git a/libavcodec/mips/idctdsp_mips.h b/libavcodec/mips/idctdsp_mips.h
index 19267e6705..7ca7c1c93f 100644
--- a/libavcodec/mips/idctdsp_mips.h
+++ b/libavcodec/mips/idctdsp_mips.h
@@ -34,11 +34,11 @@ void ff_add_pixels_clamped_msa(const int16_t *block,
                                uint8_t *av_restrict pixels,
                                ptrdiff_t line_size);
 void ff_j_rev_dct_msa(int16_t *data);
-void ff_jref_idct_put_msa(uint8_t *dest, int32_t stride, int16_t *block);
-void ff_jref_idct_add_msa(uint8_t *dest, int32_t stride, int16_t *block);
+void ff_jref_idct_put_msa(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+void ff_jref_idct_add_msa(uint8_t *dest, ptrdiff_t stride, int16_t *block);
 void ff_simple_idct_msa(int16_t *block);
-void ff_simple_idct_put_msa(uint8_t *dest, int32_t stride_dst, int16_t *block);
-void ff_simple_idct_add_msa(uint8_t *dest, int32_t stride_dst, int16_t *block);
+void ff_simple_idct_put_msa(uint8_t *dest, ptrdiff_t stride_dst, int16_t *block);
+void ff_simple_idct_add_msa(uint8_t *dest, ptrdiff_t stride_dst, int16_t *block);
 
 void ff_put_pixels_clamped_mmi(const int16_t *block,
         uint8_t *av_restrict pixels, ptrdiff_t line_size);
@@ -47,7 +47,7 @@ void ff_put_signed_pixels_clamped_mmi(const int16_t *block,
 void ff_add_pixels_clamped_mmi(const int16_t *block,
         uint8_t *av_restrict pixels, ptrdiff_t line_size);
 void ff_simple_idct_mmi(int16_t *block);
-void ff_simple_idct_put_mmi(uint8_t *dest, int32_t line_size, int16_t *block);
-void ff_simple_idct_add_mmi(uint8_t *dest, int32_t line_size, int16_t *block);
+void ff_simple_idct_put_mmi(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_add_mmi(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 #endif  // #ifndef AVCODEC_MIPS_IDCTDSP_MIPS_H
diff --git a/libavcodec/mips/simple_idct_msa.c b/libavcodec/mips/simple_idct_msa.c
index bd8b31012f..8a7235927e 100644
--- a/libavcodec/mips/simple_idct_msa.c
+++ b/libavcodec/mips/simple_idct_msa.c
@@ -562,12 +562,12 @@ void ff_simple_idct_msa(int16_t *block)
     simple_idct_msa(block);
 }
 
-void ff_simple_idct_put_msa(uint8_t *dst, int32_t dst_stride, int16_t *block)
+void ff_simple_idct_put_msa(uint8_t *dst, ptrdiff_t dst_stride, int16_t *block)
 {
     simple_idct_put_msa(dst, dst_stride, block);
 }
 
-void ff_simple_idct_add_msa(uint8_t *dst, int32_t dst_stride, int16_t *block)
+void ff_simple_idct_add_msa(uint8_t *dst, ptrdiff_t dst_stride, int16_t *block)
 {
     simple_idct_add_msa(dst, dst_stride, block);
 }
diff --git a/libavcodec/mips/vc1dsp_mips.h b/libavcodec/mips/vc1dsp_mips.h
index 2cdd90069b..b9b07e1ce3 100644
--- a/libavcodec/mips/vc1dsp_mips.h
+++ b/libavcodec/mips/vc1dsp_mips.h
@@ -157,14 +157,14 @@ void ff_avg_vc1_mspel_mc33_16_mmi(uint8_t *dst, const uint8_t *src,
                                   ptrdiff_t stride, int rnd);
 
 void ff_vc1_inv_trans_8x8_mmi(int16_t block[64]);
-void ff_vc1_inv_trans_8x4_mmi(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x8_mmi(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x4_mmi(uint8_t *dest, int linesize, int16_t *block);
+void ff_vc1_inv_trans_8x4_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
+void ff_vc1_inv_trans_4x8_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
+void ff_vc1_inv_trans_4x4_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
 
-void ff_vc1_inv_trans_4x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_4x8_dc_mmi(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_8x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block);
-void ff_vc1_inv_trans_8x8_dc_mmi(uint8_t *dest, int linesize, int16_t *block);
+void ff_vc1_inv_trans_4x4_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
+void ff_vc1_inv_trans_4x8_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
+void ff_vc1_inv_trans_8x4_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
+void ff_vc1_inv_trans_8x8_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block);
 
 void ff_vc1_v_overlap_mmi(uint8_t *src, int stride);
 void ff_vc1_h_overlap_mmi(uint8_t *src, int stride);
diff --git a/libavcodec/mips/vc1dsp_mmi.c b/libavcodec/mips/vc1dsp_mmi.c
index dfae2d9658..01e7f9f32c 100644
--- a/libavcodec/mips/vc1dsp_mmi.c
+++ b/libavcodec/mips/vc1dsp_mmi.c
@@ -141,7 +141,7 @@
 
 
 /* Do inverse transform on 8x8 block */
-void ff_vc1_inv_trans_8x8_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_8x8_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int dc = block[0];
     double ftmp[9];
@@ -368,7 +368,7 @@ void ff_vc1_inv_trans_8x8_mmi(int16_t block[64])
 #endif
 
 /* Do inverse transform on 8x4 part of block */
-void ff_vc1_inv_trans_8x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_8x4_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int dc = block[0];
     double ftmp[9];
@@ -425,7 +425,7 @@ void ff_vc1_inv_trans_8x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
 }
 
 #if _MIPS_SIM != _ABIO32
-void ff_vc1_inv_trans_8x4_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_8x4_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int16_t *src = block;
     int16_t *dst = block;
@@ -599,7 +599,7 @@ void ff_vc1_inv_trans_8x4_mmi(uint8_t *dest, int linesize, int16_t *block)
 #endif
 
 /* Do inverse transform on 4x8 parts of block */
-void ff_vc1_inv_trans_4x8_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_4x8_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int dc = block[0];
     double ftmp[9];
@@ -672,7 +672,7 @@ void ff_vc1_inv_trans_4x8_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
 }
 
 #if _MIPS_SIM != _ABIO32
-void ff_vc1_inv_trans_4x8_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_4x8_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int16_t *src = block;
     int16_t *dst = block;
@@ -838,7 +838,7 @@ void ff_vc1_inv_trans_4x8_mmi(uint8_t *dest, int linesize, int16_t *block)
 #endif
 
 /* Do inverse transform on 4x4 part of block */
-void ff_vc1_inv_trans_4x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_4x4_dc_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int dc = block[0];
     double ftmp[5];
@@ -886,7 +886,7 @@ void ff_vc1_inv_trans_4x4_dc_mmi(uint8_t *dest, int linesize, int16_t *block)
     );
 }
 
-void ff_vc1_inv_trans_4x4_mmi(uint8_t *dest, int linesize, int16_t *block)
+void ff_vc1_inv_trans_4x4_mmi(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     int16_t *src = block;
     int16_t *dst = block;
diff --git a/libavcodec/ppc/idctdsp.c b/libavcodec/ppc/idctdsp.c
index 80e71fdaf0..f1b42470fb 100644
--- a/libavcodec/ppc/idctdsp.c
+++ b/libavcodec/ppc/idctdsp.c
@@ -169,7 +169,7 @@ static void idct_altivec(int16_t *blk)
     block[7] = vx7;
 }
 
-static void idct_put_altivec(uint8_t *dest, int stride, int16_t *blk)
+static void idct_put_altivec(uint8_t *dest, ptrdiff_t stride, int16_t *blk)
 {
     vec_s16 *block = (vec_s16 *) blk;
     vec_u8 tmp;
@@ -198,7 +198,7 @@ static void idct_put_altivec(uint8_t *dest, int stride, int16_t *blk)
     COPY(dest, vx7);
 }
 
-static void idct_add_altivec(uint8_t *dest, int stride, int16_t *blk)
+static void idct_add_altivec(uint8_t *dest, ptrdiff_t stride, int16_t *blk)
 {
     vec_s16 *block = (vec_s16 *) blk;
     vec_u8 tmp;
diff --git a/libavcodec/ppc/vc1dsp_altivec.c b/libavcodec/ppc/vc1dsp_altivec.c
index 35bb280842..83d537f0c1 100644
--- a/libavcodec/ppc/vc1dsp_altivec.c
+++ b/libavcodec/ppc/vc1dsp_altivec.c
@@ -229,7 +229,8 @@ static void vc1_inv_trans_8x8_altivec(int16_t block[64])
 
 /** Do inverse transform on 8x4 part of block
 */
-static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, int16_t *block)
+static void vc1_inv_trans_8x4_altivec(uint8_t *dest, ptrdiff_t stride,
+                                      int16_t *block)
 {
     vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
     vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c
index 65b2911447..1d05b2fe08 100644
--- a/libavcodec/simple_idct.c
+++ b/libavcodec/simple_idct.c
@@ -58,7 +58,7 @@
    and the butterfly must be multiplied by 0.5 * sqrt(2.0) */
 #define C_SHIFT (4+1+12)
 
-static inline void idct4col_put(uint8_t *dest, int line_size, const int16_t *col)
+static inline void idct4col_put(uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
 {
     int c0, c1, c2, c3, a0, a1, a2, a3;
 
@@ -94,7 +94,7 @@ static inline void idct4col_put(uint8_t *dest, int line_size, const int16_t *col
 /* XXX: I think a 1.0/sqrt(2) normalization should be needed to
    compensate the extra butterfly stage - I don't have the full DV
    specification */
-void ff_simple_idct248_put(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
     int16_t *ptr;
@@ -137,7 +137,7 @@ void ff_simple_idct248_put(uint8_t *dest, int line_size, int16_t *block)
 #define C2 C_FIX(0.2705980501)
 #define C3 C_FIX(0.5)
 #define C_SHIFT (4+1+12)
-static inline void idct4col_add(uint8_t *dest, int line_size, const int16_t *col)
+static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
 {
     int c0, c1, c2, c3, a0, a1, a2, a3;
 
@@ -182,7 +182,7 @@ static inline void idct4row(int16_t *row)
     row[3]= (c0 - c1) >> R_SHIFT;
 }
 
-void ff_simple_idct84_add(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct84_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
 
@@ -197,7 +197,7 @@ void ff_simple_idct84_add(uint8_t *dest, int line_size, int16_t *block)
     }
 }
 
-void ff_simple_idct48_add(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct48_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
 
@@ -212,7 +212,7 @@ void ff_simple_idct48_add(uint8_t *dest, int line_size, int16_t *block)
     }
 }
 
-void ff_simple_idct44_add(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct44_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
 
diff --git a/libavcodec/simple_idct.h b/libavcodec/simple_idct.h
index 154e297470..2a5e1d7f6d 100644
--- a/libavcodec/simple_idct.h
+++ b/libavcodec/simple_idct.h
@@ -28,18 +28,19 @@
 #ifndef AVCODEC_SIMPLE_IDCT_H
 #define AVCODEC_SIMPLE_IDCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
-void ff_simple_idct_put_8(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct_add_8(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct_put_8(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_add_8(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 void ff_simple_idct_8(int16_t *block);
 
-void ff_simple_idct_put_10(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct_add_10(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct_put_10(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_add_10(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 void ff_simple_idct_10(int16_t *block);
 
-void ff_simple_idct_put_12(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct_add_12(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct_put_12(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_add_12(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 void ff_simple_idct_12(int16_t *block);
 
 /**
@@ -49,10 +50,10 @@ void ff_simple_idct_12(int16_t *block);
  */
 void ff_prores_idct(int16_t *block, const int16_t *qmat);
 
-void ff_simple_idct248_put(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
-void ff_simple_idct84_add(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct48_add(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct44_add(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct84_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct48_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct44_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 #endif /* AVCODEC_SIMPLE_IDCT_H */
diff --git a/libavcodec/simple_idct_template.c b/libavcodec/simple_idct_template.c
index c669767761..f532313441 100644
--- a/libavcodec/simple_idct_template.c
+++ b/libavcodec/simple_idct_template.c
@@ -250,7 +250,7 @@ static inline void FUNC(idctRowCondDC)(int16_t *row, int extra_shift)
 #ifdef EXTRA_SHIFT
 static inline void FUNC(idctSparseCol_extrashift)(int16_t *col)
 #else
-static inline void FUNC(idctSparseColPut)(pixel *dest, int line_size,
+static inline void FUNC(idctSparseColPut)(pixel *dest, ptrdiff_t line_size,
                                           int16_t *col)
 {
     SUINT a0, a1, a2, a3, b0, b1, b2, b3;
@@ -274,7 +274,7 @@ static inline void FUNC(idctSparseColPut)(pixel *dest, int line_size,
     dest[0] = av_clip_pixel((int)(a0 - b0) >> COL_SHIFT);
 }
 
-static inline void FUNC(idctSparseColAdd)(pixel *dest, int line_size,
+static inline void FUNC(idctSparseColAdd)(pixel *dest, ptrdiff_t line_size,
                                           int16_t *col)
 {
     int a0, a1, a2, a3, b0, b1, b2, b3;
@@ -316,7 +316,7 @@ static inline void FUNC(idctSparseCol)(int16_t *col)
 }
 
 #ifndef EXTRA_SHIFT
-void FUNC(ff_simple_idct_put)(uint8_t *dest_, int line_size, int16_t *block)
+void FUNC(ff_simple_idct_put)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block)
 {
     pixel *dest = (pixel *)dest_;
     int i;
@@ -330,7 +330,7 @@ void FUNC(ff_simple_idct_put)(uint8_t *dest_, int line_size, int16_t *block)
         FUNC(idctSparseColPut)(dest + i, line_size, block + i);
 }
 
-void FUNC(ff_simple_idct_add)(uint8_t *dest_, int line_size, int16_t *block)
+void FUNC(ff_simple_idct_add)(uint8_t *dest_, ptrdiff_t line_size, int16_t *block)
 {
     pixel *dest = (pixel *)dest_;
     int i;
diff --git a/libavcodec/tests/dct.c b/libavcodec/tests/dct.c
index 4f0e0d958e..29af3fea8a 100644
--- a/libavcodec/tests/dct.c
+++ b/libavcodec/tests/dct.c
@@ -284,7 +284,7 @@ static int dct_error(const struct algo *dct, int test, int is_idct, int speed, c
 DECLARE_ALIGNED(8, static uint8_t, img_dest)[64];
 DECLARE_ALIGNED(8, static uint8_t, img_dest1)[64];
 
-static void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
+static void idct248_ref(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 {
     static int init;
     static double c8[8][8];
@@ -365,7 +365,8 @@ static void idct248_ref(uint8_t *dest, int linesize, int16_t *block)
 }
 
 static void idct248_error(const char *name,
-                          void (*idct248_put)(uint8_t *dest, int line_size,
+                          void (*idct248_put)(uint8_t *dest,
+                                              ptrdiff_t line_size,
                                               int16_t *block),
                           int speed)
 {
diff --git a/libavcodec/vc1dsp.c b/libavcodec/vc1dsp.c
index 8f48f0cbe7..eaadebe6d0 100644
--- a/libavcodec/vc1dsp.c
+++ b/libavcodec/vc1dsp.c
@@ -238,7 +238,7 @@ static void vc1_h_loop_filter16_c(uint8_t *src, int stride, int pq)
 }
 
 /* Do inverse transform on 8x8 block */
-static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     int dc = block[0];
@@ -255,7 +255,7 @@ static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, int16_t *block)
         dest[5] = av_clip_uint8(dest[5] + dc);
         dest[6] = av_clip_uint8(dest[6] + dc);
         dest[7] = av_clip_uint8(dest[7] + dc);
-        dest += linesize;
+        dest += stride;
     }
 }
 
@@ -329,7 +329,7 @@ static void vc1_inv_trans_8x8_c(int16_t block[64])
 }
 
 /* Do inverse transform on 8x4 part of block */
-static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     int dc = block[0];
@@ -346,11 +346,11 @@ static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, int16_t *block)
         dest[5] = av_clip_uint8(dest[5] + dc);
         dest[6] = av_clip_uint8(dest[6] + dc);
         dest[7] = av_clip_uint8(dest[7] + dc);
-        dest += linesize;
+        dest += stride;
     }
 }
 
-static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_8x4_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     register int t1, t2, t3, t4, t5, t6, t7, t8;
@@ -395,10 +395,10 @@ static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, int16_t *block)
         t3 = 22 * src[ 8] + 10 * src[24];
         t4 = 22 * src[24] - 10 * src[ 8];
 
-        dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t1 + t3) >> 7));
-        dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t2 - t4) >> 7));
-        dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t2 + t4) >> 7));
-        dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t1 - t3) >> 7));
+        dest[0 * stride] = av_clip_uint8(dest[0 * stride] + ((t1 + t3) >> 7));
+        dest[1 * stride] = av_clip_uint8(dest[1 * stride] + ((t2 - t4) >> 7));
+        dest[2 * stride] = av_clip_uint8(dest[2 * stride] + ((t2 + t4) >> 7));
+        dest[3 * stride] = av_clip_uint8(dest[3 * stride] + ((t1 - t3) >> 7));
 
         src++;
         dest++;
@@ -406,7 +406,7 @@ static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, int16_t *block)
 }
 
 /* Do inverse transform on 4x8 parts of block */
-static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     int dc = block[0];
@@ -419,11 +419,11 @@ static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, int16_t *block)
         dest[1] = av_clip_uint8(dest[1] + dc);
         dest[2] = av_clip_uint8(dest[2] + dc);
         dest[3] = av_clip_uint8(dest[3] + dc);
-        dest += linesize;
+        dest += stride;
     }
 }
 
-static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_4x8_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     register int t1, t2, t3, t4, t5, t6, t7, t8;
@@ -464,14 +464,14 @@ static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, int16_t *block)
         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];
         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];
 
-        dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t5 + t1)     >> 7));
-        dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t6 + t2)     >> 7));
-        dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t7 + t3)     >> 7));
-        dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t8 + t4)     >> 7));
-        dest[4 * linesize] = av_clip_uint8(dest[4 * linesize] + ((t8 - t4 + 1) >> 7));
-        dest[5 * linesize] = av_clip_uint8(dest[5 * linesize] + ((t7 - t3 + 1) >> 7));
-        dest[6 * linesize] = av_clip_uint8(dest[6 * linesize] + ((t6 - t2 + 1) >> 7));
-        dest[7 * linesize] = av_clip_uint8(dest[7 * linesize] + ((t5 - t1 + 1) >> 7));
+        dest[0 * stride] = av_clip_uint8(dest[0 * stride] + ((t5 + t1)     >> 7));
+        dest[1 * stride] = av_clip_uint8(dest[1 * stride] + ((t6 + t2)     >> 7));
+        dest[2 * stride] = av_clip_uint8(dest[2 * stride] + ((t7 + t3)     >> 7));
+        dest[3 * stride] = av_clip_uint8(dest[3 * stride] + ((t8 + t4)     >> 7));
+        dest[4 * stride] = av_clip_uint8(dest[4 * stride] + ((t8 - t4 + 1) >> 7));
+        dest[5 * stride] = av_clip_uint8(dest[5 * stride] + ((t7 - t3 + 1) >> 7));
+        dest[6 * stride] = av_clip_uint8(dest[6 * stride] + ((t6 - t2 + 1) >> 7));
+        dest[7 * stride] = av_clip_uint8(dest[7 * stride] + ((t5 - t1 + 1) >> 7));
 
         src++;
         dest++;
@@ -479,7 +479,7 @@ static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, int16_t *block)
 }
 
 /* Do inverse transform on 4x4 part of block */
-static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     int dc = block[0];
@@ -492,11 +492,11 @@ static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, int16_t *block)
         dest[1] = av_clip_uint8(dest[1] + dc);
         dest[2] = av_clip_uint8(dest[2] + dc);
         dest[3] = av_clip_uint8(dest[3] + dc);
-        dest += linesize;
+        dest += stride;
     }
 }
 
-static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, int16_t *block)
+static void vc1_inv_trans_4x4_c(uint8_t *dest, ptrdiff_t stride, int16_t *block)
 {
     int i;
     register int t1, t2, t3, t4;
@@ -526,10 +526,10 @@ static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, int16_t *block)
         t3 = 22 * src[8] + 10 * src[24];
         t4 = 22 * src[24] - 10 * src[8];
 
-        dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t1 + t3) >> 7));
-        dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t2 - t4) >> 7));
-        dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t2 + t4) >> 7));
-        dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t1 - t3) >> 7));
+        dest[0 * stride] = av_clip_uint8(dest[0 * stride] + ((t1 + t3) >> 7));
+        dest[1 * stride] = av_clip_uint8(dest[1 * stride] + ((t2 - t4) >> 7));
+        dest[2 * stride] = av_clip_uint8(dest[2 * stride] + ((t2 + t4) >> 7));
+        dest[3 * stride] = av_clip_uint8(dest[3 * stride] + ((t1 - t3) >> 7));
 
         src++;
         dest++;
diff --git a/libavcodec/vc1dsp.h b/libavcodec/vc1dsp.h
index 9543070895..16b3528a75 100644
--- a/libavcodec/vc1dsp.h
+++ b/libavcodec/vc1dsp.h
@@ -35,13 +35,13 @@ typedef void (*vc1op_pixels_func)(uint8_t *block/*align width (8 or 16)*/, const
 typedef struct VC1DSPContext {
     /* vc1 functions */
     void (*vc1_inv_trans_8x8)(int16_t *b);
-    void (*vc1_inv_trans_8x4)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_4x8)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_4x4)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_8x8_dc)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_8x4_dc)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_4x8_dc)(uint8_t *dest, int line_size, int16_t *block);
-    void (*vc1_inv_trans_4x4_dc)(uint8_t *dest, int line_size, int16_t *block);
+    void (*vc1_inv_trans_8x4)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_4x8)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_4x4)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_8x8_dc)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_8x4_dc)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_4x8_dc)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
+    void (*vc1_inv_trans_4x4_dc)(uint8_t *dest, ptrdiff_t stride, int16_t *block);
     void (*vc1_v_overlap)(uint8_t *src, int stride);
     void (*vc1_h_overlap)(uint8_t *src, int stride);
     void (*vc1_v_s_overlap)(int16_t *top,  int16_t *bottom);
diff --git a/libavcodec/wmv2dsp.c b/libavcodec/wmv2dsp.c
index b9e98d5282..162ac92a72 100644
--- a/libavcodec/wmv2dsp.c
+++ b/libavcodec/wmv2dsp.c
@@ -93,7 +93,7 @@ static void wmv2_idct_col(short * b)
     b[8 * 7] = (a0 + a2 - a1 - a5 + (1 << 13)) >> 14;
 }
 
-static void wmv2_idct_add_c(uint8_t *dest, int line_size, int16_t *block)
+static void wmv2_idct_add_c(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
 
@@ -116,7 +116,7 @@ static void wmv2_idct_add_c(uint8_t *dest, int line_size, int16_t *block)
     }
 }
 
-static void wmv2_idct_put_c(uint8_t *dest, int line_size, int16_t *block)
+static void wmv2_idct_put_c(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     int i;
 
diff --git a/libavcodec/wmv2dsp.h b/libavcodec/wmv2dsp.h
index 62a990d9d7..5e40b30a20 100644
--- a/libavcodec/wmv2dsp.h
+++ b/libavcodec/wmv2dsp.h
@@ -24,8 +24,8 @@
 #include "qpeldsp.h"
 
 typedef struct WMV2DSPContext {
-    void (*idct_add)(uint8_t *dest, int line_size, int16_t *block);
-    void (*idct_put)(uint8_t *dest, int line_size, int16_t *block);
+    void (*idct_add)(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+    void (*idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
     qpel_mc_func put_mspel_pixels_tab[8];
 
diff --git a/libavcodec/x86/idctdsp.h b/libavcodec/x86/idctdsp.h
index daa4e798ed..e2e296ac81 100644
--- a/libavcodec/x86/idctdsp.h
+++ b/libavcodec/x86/idctdsp.h
@@ -19,6 +19,7 @@
 #ifndef AVCODEC_X86_IDCTDSP_H
 #define AVCODEC_X86_IDCTDSP_H
 
+#include <stddef.h>
 #include <stdint.h>
 #include <stddef.h>
 
@@ -35,4 +36,5 @@ void ff_put_signed_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
 void ff_put_signed_pixels_clamped_sse2(const int16_t *block, uint8_t *pixels,
                                        ptrdiff_t line_size);
 
+
 #endif /* AVCODEC_X86_IDCTDSP_H */
diff --git a/libavcodec/x86/simple_idct.c b/libavcodec/x86/simple_idct.c
index 333d6e1a28..d3a19fa60d 100644
--- a/libavcodec/x86/simple_idct.c
+++ b/libavcodec/x86/simple_idct.c
@@ -904,12 +904,12 @@ void ff_simple_idct_mmx(int16_t *block)
 
 //FIXME merge add/put into the idct
 
-void ff_simple_idct_put_mmx(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct_put_mmx(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     idct(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
-void ff_simple_idct_add_mmx(uint8_t *dest, int line_size, int16_t *block)
+void ff_simple_idct_add_mmx(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     idct(block);
     ff_add_pixels_clamped(block, dest, line_size);
diff --git a/libavcodec/x86/simple_idct.h b/libavcodec/x86/simple_idct.h
index 8eeb31e299..ad76bafd85 100644
--- a/libavcodec/x86/simple_idct.h
+++ b/libavcodec/x86/simple_idct.h
@@ -19,22 +19,23 @@
 #ifndef AVCODEC_X86_SIMPLE_IDCT_H
 #define AVCODEC_X86_SIMPLE_IDCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 void ff_simple_idct_mmx(int16_t *block);
-void ff_simple_idct_add_mmx(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct_put_mmx(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct_add_mmx(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct_put_mmx(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 void ff_simple_idct10_sse2(int16_t *block);
 void ff_simple_idct10_avx(int16_t *block);
 
-void ff_simple_idct10_put_sse2(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct10_put_avx(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct10_put_sse2(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct10_put_avx(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 void ff_simple_idct12_sse2(int16_t *block);
 void ff_simple_idct12_avx(int16_t *block);
 
-void ff_simple_idct12_put_sse2(uint8_t *dest, int line_size, int16_t *block);
-void ff_simple_idct12_put_avx(uint8_t *dest, int line_size, int16_t *block);
+void ff_simple_idct12_put_sse2(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_simple_idct12_put_avx(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 #endif /* AVCODEC_X86_SIMPLE_IDCT_H */
diff --git a/libavcodec/x86/vc1dsp_init.c b/libavcodec/x86/vc1dsp_init.c
index c8943fa2f7..e05ae06903 100644
--- a/libavcodec/x86/vc1dsp_init.c
+++ b/libavcodec/x86/vc1dsp_init.c
@@ -92,13 +92,13 @@ void ff_put_vc1_chroma_mc8_nornd_ssse3(uint8_t *dst, uint8_t *src,
                                        int stride, int h, int x, int y);
 void ff_avg_vc1_chroma_mc8_nornd_ssse3(uint8_t *dst, uint8_t *src,
                                        int stride, int h, int x, int y);
-void ff_vc1_inv_trans_4x4_dc_mmxext(uint8_t *dest, int linesize,
+void ff_vc1_inv_trans_4x4_dc_mmxext(uint8_t *dest, ptrdiff_t linesize,
                                     int16_t *block);
-void ff_vc1_inv_trans_4x8_dc_mmxext(uint8_t *dest, int linesize,
+void ff_vc1_inv_trans_4x8_dc_mmxext(uint8_t *dest, ptrdiff_t linesize,
                                     int16_t *block);
-void ff_vc1_inv_trans_8x4_dc_mmxext(uint8_t *dest, int linesize,
+void ff_vc1_inv_trans_8x4_dc_mmxext(uint8_t *dest, ptrdiff_t linesize,
                                     int16_t *block);
-void ff_vc1_inv_trans_8x8_dc_mmxext(uint8_t *dest, int linesize,
+void ff_vc1_inv_trans_8x8_dc_mmxext(uint8_t *dest, ptrdiff_t linesize,
                                     int16_t *block);
 
 
diff --git a/libavcodec/x86/vc1dsp_mc.asm b/libavcodec/x86/vc1dsp_mc.asm
index 175c397ae9..2850ca861d 100644
--- a/libavcodec/x86/vc1dsp_mc.asm
+++ b/libavcodec/x86/vc1dsp_mc.asm
@@ -225,7 +225,7 @@ HOR_16B_SHIFT2 OP_AVG, avg
     mov%1 [linesize3q +destq], m5
 %endmacro
 
-; ff_vc1_inv_trans_?x?_dc_mmxext(uint8_t *dest, int linesize, int16_t *block)
+; ff_vc1_inv_trans_?x?_dc_mmxext(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
 INIT_MMX mmxext
 cglobal vc1_inv_trans_4x4_dc, 3,4,0, dest, linesize, block
     movsx         r3d, WORD [blockq]
diff --git a/libavcodec/x86/xvididct.h b/libavcodec/x86/xvididct.h
index 573b25c6b5..edb5ebfd31 100644
--- a/libavcodec/x86/xvididct.h
+++ b/libavcodec/x86/xvididct.h
@@ -26,18 +26,19 @@
 #ifndef AVCODEC_X86_XVIDIDCT_H
 #define AVCODEC_X86_XVIDIDCT_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 void ff_xvid_idct_mmx(short *block);
-void ff_xvid_idct_mmx_put(uint8_t *dest, int line_size, int16_t *block);
-void ff_xvid_idct_mmx_add(uint8_t *dest, int line_size, int16_t *block);
+void ff_xvid_idct_mmx_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_xvid_idct_mmx_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 void ff_xvid_idct_mmxext(short *block);
-void ff_xvid_idct_mmxext_put(uint8_t *dest, int line_size, int16_t *block);
-void ff_xvid_idct_mmxext_add(uint8_t *dest, int line_size, int16_t *block);
+void ff_xvid_idct_mmxext_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
+void ff_xvid_idct_mmxext_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block);
 
 void ff_xvid_idct_sse2(short *block);
-void ff_xvid_idct_put_sse2(uint8_t *dest, int line_size, short *block);
-void ff_xvid_idct_add_sse2(uint8_t *dest, int line_size, short *block);
+void ff_xvid_idct_put_sse2(uint8_t *dest, ptrdiff_t line_size, short *block);
+void ff_xvid_idct_add_sse2(uint8_t *dest, ptrdiff_t line_size, short *block);
 
 #endif /* AVCODEC_X86_XVIDIDCT_H */
diff --git a/libavcodec/x86/xvididct_init.c b/libavcodec/x86/xvididct_init.c
index 8b9d8de0cd..fd10953829 100644
--- a/libavcodec/x86/xvididct_init.c
+++ b/libavcodec/x86/xvididct_init.c
@@ -27,25 +27,25 @@
 #include "xvididct.h"
 
 #if ARCH_X86_32 && HAVE_YASM
-static void xvid_idct_mmx_put(uint8_t *dest, int line_size, short *block)
+static void xvid_idct_mmx_put(uint8_t *dest, ptrdiff_t line_size, short *block)
 {
     ff_xvid_idct_mmx(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-static void xvid_idct_mmx_add(uint8_t *dest, int line_size, short *block)
+static void xvid_idct_mmx_add(uint8_t *dest, ptrdiff_t line_size, short *block)
 {
     ff_xvid_idct_mmx(block);
     ff_add_pixels_clamped(block, dest, line_size);
 }
 
-static void xvid_idct_mmxext_put(uint8_t *dest, int line_size, short *block)
+static void xvid_idct_mmxext_put(uint8_t *dest, ptrdiff_t line_size, short *block)
 {
     ff_xvid_idct_mmxext(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-static void xvid_idct_mmxext_add(uint8_t *dest, int line_size, short *block)
+static void xvid_idct_mmxext_add(uint8_t *dest, ptrdiff_t line_size, short *block)
 {
     ff_xvid_idct_mmxext(block);
     ff_add_pixels_clamped(block, dest, line_size);
diff --git a/libavcodec/xvididct.c b/libavcodec/xvididct.c
index 1f96ccc35c..4642a30d62 100644
--- a/libavcodec/xvididct.c
+++ b/libavcodec/xvididct.c
@@ -318,13 +318,13 @@ void ff_xvid_idct(int16_t *const in)
     }
 }
 
-static void xvid_idct_put(uint8_t *dest, int line_size, int16_t *block)
+static void xvid_idct_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_xvid_idct(block);
     ff_put_pixels_clamped(block, dest, line_size);
 }
 
-static void xvid_idct_add(uint8_t *dest, int line_size, int16_t *block)
+static void xvid_idct_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
 {
     ff_xvid_idct(block);
     ff_add_pixels_clamped(block, dest, line_size);