19 #ifndef AVCODEC_ME_CMP_H 20 #define AVCODEC_ME_CMP_H me_cmp_func frame_skip_cmp[6]
int(* sum_abs_dctelem)(int16_t *block)
void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)
me_cmp_func me_pre_cmp[6]
me_cmp_func hadamard8_diff[6]
The exact code depends on how similar the blocks are and how related they are to the block
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
me_cmp_func dct264_sad[6]
int(* me_cmp_func)(struct MpegEncContext *c, uint8_t *blk1, uint8_t *blk2, ptrdiff_t stride, int h)
const uint32_t ff_square_tab[512]
void ff_me_cmp_init_mips(MECmpContext *c, AVCodecContext *avctx)
void ff_me_cmp_init_alpha(MECmpContext *c, AVCodecContext *avctx)
me_cmp_func pix_abs[2][4]
void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
static av_always_inline int cmp(MpegEncContext *s, const int x, const int y, const int subx, const int suby, const int size, const int h, int ref_index, int src_index, me_cmp_func cmp_func, me_cmp_func chroma_cmp_func, const int flags)
compares a block (either a full macroblock or a partition thereof) against a proposed motion-compensa...
void ff_set_cmp(MECmpContext *c, me_cmp_func *cmp, int type)
Libavcodec external API header.
main external API structure.
int ff_check_alignment(void)
me_cmp_func median_sad[6]
me_cmp_func me_sub_cmp[6]
void ff_me_cmp_init_arm(MECmpContext *c, AVCodecContext *avctx)
me_cmp_func quant_psnr[6]
void ff_dsputil_init_dwt(MECmpContext *c)
void ff_me_cmp_init_x86(MECmpContext *c, AVCodecContext *avctx)