Improve understanding ofavcodec_find_decoder()

[ffmpeg] / libavcodec / dsputil.h

diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 157426748ceaad05d0b7a1b0b557668c5d1afa54..a14480a81da5cb79067ed221cbdd30af6639ba90 100644 (file)
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -30,7 +30,6 @@
 #ifndef DSPUTIL_H
 #define DSPUTIL_H
 
-#include "common.h"
 #include "avcodec.h"
 
 
@@ -145,7 +144,7 @@ static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
 
 /* motion estimation */
 // h is limited to {width/2, width, 2*width} but never larger than 16 and never smaller then 2
-// allthough currently h<4 is not used as functions with width <8 are not used and neither implemented
+// although currently h<4 is not used as functions with width <8 are neither used nor implemented
 typedef int (*me_cmp_func)(void /*MpegEncContext*/ *s, uint8_t *blk1/*align width (8 or 16)*/, uint8_t *blk2/*align 1*/, int line_size, int h)/* __attribute__ ((const))*/;
 
 
@@ -164,6 +163,7 @@ typedef struct DSPContext {
     void (*add_pixels_clamped)(const DCTELEM *block/*align 16*/, uint8_t *pixels/*align 8*/, int line_size);
     void (*add_pixels8)(uint8_t *pixels, DCTELEM *block, int line_size);
     void (*add_pixels4)(uint8_t *pixels, DCTELEM *block, int line_size);
+    int (*sum_abs_dctelem)(DCTELEM *block/*align 16*/);
     /**
      * translational global motion compensation.
      */
@@ -200,9 +200,11 @@ typedef struct DSPContext {
     me_cmp_func ildct_cmp[5]; //only width 16 used
     me_cmp_func frame_skip_cmp[5]; //only width 8 used
 
+    int (*ssd_int8_vs_int16)(int8_t *pix1, int16_t *pix2, int size);
+
     /**
      * Halfpel motion compensation with rounding (a+b+1)>>1.
-     * this is an array[4][4] of motion compensation funcions for 4
+     * this is an array[4][4] of motion compensation functions for 4
      * horizontal blocksizes (8,16) and the 4 halfpel positions<br>
      * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]
      * @param block destination where the result is stored
@@ -226,7 +228,7 @@ typedef struct DSPContext {
 
     /**
      * Halfpel motion compensation with no rounding (a+b)>>1.
-     * this is an array[2][4] of motion compensation funcions for 2
+     * this is an array[2][4] of motion compensation functions for 2
      * horizontal blocksizes (8,16) and the 4 halfpel positions<br>
      * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]
      * @param block destination where the result is stored
@@ -238,7 +240,7 @@ typedef struct DSPContext {
 
     /**
      * Halfpel motion compensation with no rounding (a+b)>>1.
-     * this is an array[2][4] of motion compensation funcions for 2
+     * this is an array[2][4] of motion compensation functions for 2
      * horizontal blocksizes (8,16) and the 4 halfpel positions<br>
      * *pixels_tab[ 0->16xH 1->8xH ][ xhalfpel + 2*yhalfpel ]
      * @param block destination into which the result is averaged (a+b)>>1
@@ -252,7 +254,8 @@ typedef struct DSPContext {
 
     /**
      * Thirdpel motion compensation with rounding (a+b+1)>>1.
-     * this is an array[12] of motion compensation funcions for the 9 thirdpel positions<br>
+     * this is an array[12] of motion compensation functions for the 9 thirdpe
+     * positions<br>
      * *pixels_tab[ xthirdpel + 4*ythirdpel ]
      * @param block destination where the result is stored
      * @param pixels source
@@ -269,7 +272,7 @@ typedef struct DSPContext {
     qpel_mc_func put_mspel_pixels_tab[8];
 
     /**
-     * h264 Chram MC
+     * h264 Chroma MC
      */
     h264_chroma_mc_func put_h264_chroma_pixels_tab[3];
     /* This is really one func used in VC-1 decoding */
@@ -467,11 +470,7 @@ static inline int get_penalty_factor(int lambda, int lambda2, int type){
    one or more MultiMedia extension */
 int mm_support(void);
 
-#ifdef __GNUC__
-  #define DECLARE_ALIGNED_16(t,v)       t v __attribute__ ((aligned (16)))
-#else
-  #define DECLARE_ALIGNED_16(t,v)      __declspec(align(16)) t v
-#endif
+#define DECLARE_ALIGNED_16(t, v) DECLARE_ALIGNED(16, t, v)
 
 #if defined(HAVE_MMX)
 
@@ -504,11 +503,7 @@ static inline void emms(void)
         emms();\
 }
 
-#ifdef __GNUC__
-  #define DECLARE_ALIGNED_8(t,v)       t v __attribute__ ((aligned (8)))
-#else
-  #define DECLARE_ALIGNED_8(t,v)      __declspec(align(8)) t v
-#endif
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 
 #define STRIDE_ALIGN 8
 
@@ -519,7 +514,7 @@ void dsputil_init_pix_mmx(DSPContext* c, AVCodecContext *avctx);
 
 /* This is to use 4 bytes read to the IDCT pointers for some 'zero'
    line optimizations */
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (4)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(4, t, v)
 #define STRIDE_ALIGN 4
 
 #define MM_IWMMXT    0x0100 /* XScale IWMMXT */
@@ -531,7 +526,7 @@ void dsputil_init_armv4l(DSPContext* c, AVCodecContext *avctx);
 #elif defined(HAVE_MLIB)
 
 /* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 
 void dsputil_init_mlib(DSPContext* c, AVCodecContext *avctx);
@@ -539,13 +534,13 @@ void dsputil_init_mlib(DSPContext* c, AVCodecContext *avctx);
 #elif defined(ARCH_SPARC)
 
 /* SPARC/VIS IDCT needs 8-byte aligned DCT blocks */
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 void dsputil_init_vis(DSPContext* c, AVCodecContext *avctx);
 
 #elif defined(ARCH_ALPHA)
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 
 void dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
@@ -562,35 +557,35 @@ extern int mm_flags;
 #undef pixel
 #endif
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (16)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(16, t, v)
 #define STRIDE_ALIGN 16
 
 void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx);
 
 #elif defined(HAVE_MMI)
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (16)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(16, t, v)
 #define STRIDE_ALIGN 16
 
 void dsputil_init_mmi(DSPContext* c, AVCodecContext *avctx);
 
 #elif defined(ARCH_SH4)
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 
 void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx);
 
 #elif defined(ARCH_BFIN)
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 
 void dsputil_init_bfin(DSPContext* c, AVCodecContext *avctx);
 
 #else
 
-#define DECLARE_ALIGNED_8(t,v)    t v __attribute__ ((aligned (8)))
+#define DECLARE_ALIGNED_8(t, v) DECLARE_ALIGNED(8, t, v)
 #define STRIDE_ALIGN 8
 
 #endif