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19 #ifndef AVCODEC_VP3DSP_H
20 #define AVCODEC_VP3DSP_H
void ff_vp3dsp_init_mips(VP3DSPContext *c, int flags)
void(* h_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
void ff_vp3dsp_idct10_add(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* put_no_rnd_pixels_l2)(uint8_t *dst, const uint8_t *a, const uint8_t *b, ptrdiff_t stride, int h)
Copy 8xH pixels from source to destination buffer using a bilinear filter with no rounding (i....
void(* v_loop_filter)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
void(* v_loop_filter_unaligned)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
void ff_vp3dsp_h_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values)
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
void ff_vp3dsp_v_loop_filter_12(uint8_t *first_pixel, ptrdiff_t stride, int *bounding_values)
void(* idct_put)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
void ff_vp3dsp_init_arm(VP3DSPContext *c, int flags)
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
void(* h_loop_filter_unaligned)(uint8_t *src, ptrdiff_t stride, int *bounding_values)
void ff_vp3dsp_init(VP3DSPContext *c, int flags)
void ff_vp3dsp_init_x86(VP3DSPContext *c, int flags)
void ff_vp3dsp_set_bounding_values(int *bound_values_array, int filter_limit)
void(* idct_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void ff_vp3dsp_init_ppc(VP3DSPContext *c, int flags)
#define flags(name, subs,...)
The exact code depends on how similar the blocks are and how related they are to the block
void ff_vp3dsp_idct10_put(uint8_t *dest, ptrdiff_t stride, int16_t *block)
void(* idct_dc_add)(uint8_t *dest, ptrdiff_t stride, int16_t *block)