50 t1 = vec_mradds(a1, vx7, vx1); \
51 t8 = vec_mradds(a1, vx1, vec_subs(zero, vx7)); \
52 t7 = vec_mradds(a2, vx5, vx3); \
53 t3 = vec_mradds(ma2, vx3, vx5); \
56 t5 = vec_adds(vx0, vx4); \
57 t0 = vec_subs(vx0, vx4); \
58 t2 = vec_mradds(a0, vx6, vx2); \
59 t4 = vec_mradds(a0, vx2, vec_subs(zero, vx6)); \
60 t6 = vec_adds(t8, t3); \
61 t3 = vec_subs(t8, t3); \
62 t8 = vec_subs(t1, t7); \
63 t1 = vec_adds(t1, t7); \
66 t7 = vec_adds(t5, t2); \
67 t2 = vec_subs(t5, t2); \
68 t5 = vec_adds(t0, t4); \
69 t0 = vec_subs(t0, t4); \
70 t4 = vec_subs(t8, t3); \
71 t3 = vec_adds(t8, t3); \
74 vy0 = vec_adds(t7, t1); \
75 vy7 = vec_subs(t7, t1); \
76 vy1 = vec_mradds(c4, t3, t5); \
77 vy6 = vec_mradds(mc4, t3, t5); \
78 vy2 = vec_mradds(c4, t4, t0); \
79 vy5 = vec_mradds(mc4, t4, t0); \
80 vy3 = vec_adds(t2, t6); \
81 vy4 = vec_subs(t2, t6)
84 vec_s16 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \
85 vec_s16 t0, t1, t2, t3, t4, t5, t6, t7, t8; \
87 vec_s16 c4 = vec_splat(constants[0], 0); \
88 vec_s16 a0 = vec_splat(constants[0], 1); \
89 vec_s16 a1 = vec_splat(constants[0], 2); \
90 vec_s16 a2 = vec_splat(constants[0], 3); \
91 vec_s16 mc4 = vec_splat(constants[0], 4); \
92 vec_s16 ma2 = vec_splat(constants[0], 5); \
93 vec_s16 bias = (vec_s16) vec_splat((vec_s32) constants[0], 3); \
95 vec_s16 zero = vec_splat_s16(0); \
96 vec_u16 shift = vec_splat_u16(4); \
98 vec_s16 vx0 = vec_mradds(vec_sl(block[0], shift), constants[1], zero); \
99 vec_s16 vx1 = vec_mradds(vec_sl(block[1], shift), constants[2], zero); \
100 vec_s16 vx2 = vec_mradds(vec_sl(block[2], shift), constants[3], zero); \
101 vec_s16 vx3 = vec_mradds(vec_sl(block[3], shift), constants[4], zero); \
102 vec_s16 vx4 = vec_mradds(vec_sl(block[4], shift), constants[1], zero); \
103 vec_s16 vx5 = vec_mradds(vec_sl(block[5], shift), constants[4], zero); \
104 vec_s16 vx6 = vec_mradds(vec_sl(block[6], shift), constants[3], zero); \
105 vec_s16 vx7 = vec_mradds(vec_sl(block[7], shift), constants[2], zero); \
109 vx0 = vec_mergeh(vy0, vy4); \
110 vx1 = vec_mergel(vy0, vy4); \
111 vx2 = vec_mergeh(vy1, vy5); \
112 vx3 = vec_mergel(vy1, vy5); \
113 vx4 = vec_mergeh(vy2, vy6); \
114 vx5 = vec_mergel(vy2, vy6); \
115 vx6 = vec_mergeh(vy3, vy7); \
116 vx7 = vec_mergel(vy3, vy7); \
118 vy0 = vec_mergeh(vx0, vx4); \
119 vy1 = vec_mergel(vx0, vx4); \
120 vy2 = vec_mergeh(vx1, vx5); \
121 vy3 = vec_mergel(vx1, vx5); \
122 vy4 = vec_mergeh(vx2, vx6); \
123 vy5 = vec_mergel(vx2, vx6); \
124 vy6 = vec_mergeh(vx3, vx7); \
125 vy7 = vec_mergel(vx3, vx7); \
127 vx0 = vec_adds(vec_mergeh(vy0, vy4), bias); \
128 vx1 = vec_mergel(vy0, vy4); \
129 vx2 = vec_mergeh(vy1, vy5); \
130 vx3 = vec_mergel(vy1, vy5); \
131 vx4 = vec_mergeh(vy2, vy6); \
132 vx5 = vec_mergel(vy2, vy6); \
133 vx6 = vec_mergeh(vy3, vy7); \
134 vx7 = vec_mergel(vy3, vy7); \
138 shift = vec_splat_u16(6); \
139 vx0 = vec_sra(vy0, shift); \
140 vx1 = vec_sra(vy1, shift); \
141 vx2 = vec_sra(vy2, shift); \
142 vx3 = vec_sra(vy3, shift); \
143 vx4 = vec_sra(vy4, shift); \
144 vx5 = vec_sra(vy5, shift); \
145 vx6 = vec_sra(vy6, shift); \
146 vx7 = vec_sra(vy7, shift)
149 { 23170, 13573, 6518, 21895, -23170, -21895, 32, 31 },
150 { 16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725 },
151 { 22725, 31521, 29692, 26722, 22725, 26722, 29692, 31521 },
152 { 21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692 },
153 { 19266, 26722, 25172, 22654, 19266, 22654, 25172, 26722 }
156 static void idct_altivec(int16_t *
blk)
179 #define COPY(dest, src) \
180 tmp = vec_packsu(src, src); \
181 vec_ste((vec_u32) tmp, 0, (unsigned int *) dest); \
182 vec_ste((vec_u32) tmp, 4, (unsigned int *) dest)
213 p0 = vec_lvsl(0, dest);
214 p1 = vec_lvsl(stride, dest);
215 p = vec_splat_u8(-1);
216 perm0 = vec_mergeh(p, p0);
217 perm1 = vec_mergeh(p, p1);
221 #define GET_TMP2(dest, prm) \
222 tmp = vec_ld(0, dest); \
223 tmp2 = (vec_s16) vec_perm(tmp, (vec_u8) zero, prm);
225 #define GET_TMP2(dest, prm) \
226 tmp = vec_vsx_ld(0, dest); \
227 tmp2 = (vec_s16) vec_mergeh(tmp, (vec_u8) zero)
230 #define ADD(dest, src, perm) \
231 GET_TMP2(dest, perm); \
232 tmp3 = vec_adds(tmp2, src); \
233 tmp = vec_packsu(tmp3, tmp3); \
234 vec_ste((vec_u32) tmp, 0, (unsigned int *) dest); \
235 vec_ste((vec_u32) tmp, 4, (unsigned int *) dest)
237 ADD(dest, vx0, perm0);
239 ADD(dest, vx1, perm1);
241 ADD(dest, vx2, perm0);
243 ADD(dest, vx3, perm1);
245 ADD(dest, vx4, perm0);
247 ADD(dest, vx5, perm1);
249 ADD(dest, vx6, perm0);
251 ADD(dest, vx7, perm1);
257 unsigned high_bit_depth)
263 if (!high_bit_depth && avctx->
lowres == 0) {
266 c->
idct = idct_altivec;
Macro definitions for various function/variable attributes.
av_cold void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth)
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
#define PPC_ALTIVEC(flags)
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
static const struct @177 constants[]
void(* idct_add)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
main external API structure.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
GLint GLenum GLboolean GLsizei stride
enum idct_permutation_type perm_type
void(* idct)(int16_t *block)