32 static const vec_s16 trans4[4] = {
33 { 64, 64, 64, 64, 64, 64, 64, 64 },
34 { 83, 36, 83, 36, 83, 36, 83, 36 },
35 { 64, -64, 64, -64, 64, -64, 64, -64 },
36 { 36, -83, 36, -83, 36, -83, 36, -83 },
40 { 0x00, 0x01, 0x08, 0x09, 0x10, 0x11, 0x18, 0x19, 0x02, 0x03, 0x0A, 0x0B, 0x12, 0x13, 0x1A, 0x1B },
41 { 0x04, 0x05, 0x0C, 0x0D, 0x14, 0x15, 0x1C, 0x1D, 0x06, 0x07, 0x0E, 0x0F, 0x16, 0x17, 0x1E, 0x1F },
53 src_13 = vec_mergel(src_01, src_23);
54 src_02 = vec_mergeh(src_01, src_23);
56 e0 = vec_msums(src_02, trans4[0], zero);
57 o0 = vec_msums(src_13, trans4[1], zero);
58 e1 = vec_msums(src_02, trans4[2], zero);
59 o1 = vec_msums(src_13, trans4[3], zero);
62 case 7: add = vec_sl(vec_splat_s32(1), vec_splat_u32( 7 - 1));
break;
63 case 10: add = vec_sl(vec_splat_s32(1), vec_splat_u32(10 - 1));
break;
64 case 12: add = vec_sl(vec_splat_s32(1), vec_splat_u32(12 - 1));
break;
68 e0 = vec_add(e0, add);
69 e1 = vec_add(e1, add);
71 res[0] = vec_add(e0, o0);
72 res[1] = vec_add(e1, o1);
73 res[2] = vec_sub(e1, o1);
74 res[3] = vec_sub(e0, o0);
84 case 7: v_shift = vec_splat_u32(7) ;
break;
85 case 10: v_shift = vec_splat_u32(10);
break;
86 case 12: v_shift = vec_splat_u32(12);
break;
90 for (i = 0; i < 4; i++)
91 res[i] = vec_sra(res[i], v_shift);
94 res_packed[0] = vec_packs(res[0], res[1]);
95 res_packed[1] = vec_packs(res[2], res[3]);
98 #define FUNCDECL(a, depth) a ## _ ## depth ## _altivec 99 #define FUNC(a, b) FUNCDECL(a, b) 102 #include "hevcdsp_template.c" 106 #include "hevcdsp_template.c" 117 c->
idct[0] = ff_hevc_idct_4x4_8_altivec;
119 c->
idct[0] = ff_hevc_idct_4x4_10_altivec;
static int shift(int a, int b)
Macro definitions for various function/variable attributes.
void(* idct[4])(int16_t *coeffs, int col_limit)
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
static const uint16_t mask[17]
#define PPC_ALTIVEC(flags)
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
av_cold void ff_hevc_dsp_init_ppc(HEVCDSPContext *c, const int bit_depth)
Contains misc utility macros and inline functions.
static float add(float src0, float src1)