19 #ifndef AVCODEC_ARM_CABAC_H
20 #define AVCODEC_ARM_CABAC_H
23 #if HAVE_ARMV6T2_INLINE
29 #define get_cabac_inline get_cabac_inline_arm
34 void *reg_b, *reg_c, *
tmp;
37 "ldrb %[bit] , [%[state]] \n\t"
38 "add %[r_b] , %[tables] , %[lps_off] \n\t"
39 "mov %[tmp] , %[range] \n\t"
40 "and %[range] , %[range] , #0xC0 \n\t"
41 "add %[r_b] , %[r_b] , %[bit] \n\t"
42 "ldrb %[range] , [%[r_b], %[range], lsl #1] \n\t"
43 "add %[r_b] , %[tables] , %[norm_off] \n\t"
44 "sub %[r_c] , %[tmp] , %[range] \n\t"
45 "lsl %[tmp] , %[r_c] , #17 \n\t"
46 "cmp %[tmp] , %[low] \n\t"
48 "movgt %[range] , %[r_c] \n\t"
50 "mvncc %[bit] , %[bit] \n\t"
51 "subcc %[low] , %[low] , %[tmp] \n\t"
52 "add %[r_c] , %[tables] , %[mlps_off] \n\t"
53 "ldrb %[tmp] , [%[r_b], %[range]] \n\t"
54 "ldrb %[r_b] , [%[r_c], %[bit]] \n\t"
55 "lsl %[low] , %[low] , %[tmp] \n\t"
56 "lsl %[range] , %[range] , %[tmp] \n\t"
57 "uxth %[r_c] , %[low] \n\t"
58 "strb %[r_b] , [%[state]] \n\t"
59 "tst %[r_c] , %[r_c] \n\t"
61 "ldr %[r_c] , [%[c], %[byte]] \n\t"
62 #if UNCHECKED_BITSTREAM_READER
63 "ldrh %[tmp] , [%[r_c]] \n\t"
64 "add %[r_c] , %[r_c] , #2 \n\t"
65 "str %[r_c] , [%[c], %[byte]] \n\t"
67 "ldr %[r_b] , [%[c], %[end]] \n\t"
68 "ldrh %[tmp] , [%[r_c]] \n\t"
69 "cmp %[r_c] , %[r_b] \n\t"
71 "addlt %[r_c] , %[r_c] , #2 \n\t"
72 "strlt %[r_c] , [%[c], %[byte]] \n\t"
74 "sub %[r_c] , %[low] , #1 \n\t"
75 "add %[r_b] , %[tables] , %[norm_off] \n\t"
76 "eor %[r_c] , %[low] , %[r_c] \n\t"
77 "rev %[tmp] , %[tmp] \n\t"
78 "lsr %[r_c] , %[r_c] , #15 \n\t"
79 "lsr %[tmp] , %[tmp] , #15 \n\t"
80 "ldrb %[r_c] , [%[r_b], %[r_c]] \n\t"
81 "movw %[r_b] , #0xFFFF \n\t"
82 "sub %[tmp] , %[tmp] , %[r_b] \n\t"
83 "rsb %[r_c] , %[r_c] , #7 \n\t"
84 "lsl %[tmp] , %[tmp] , %[r_c] \n\t"
85 "add %[low] , %[low] , %[tmp] \n\t"
89 [range]
"+&r"(
c->range),
__asm__(".macro parse_r var r\n\t" "\\var = -1\n\t" _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) ".iflt \\var\n\t" ".error \"Unable to parse register name \\r\"\n\t" ".endif\n\t" ".endm")
Macro definitions for various function/variable attributes.
Context Adaptive Binary Arithmetic Coder.
#define H264_LPS_RANGE_OFFSET
#define H264_MLPS_STATE_OFFSET
#define H264_NORM_SHIFT_OFFSET
const uint8_t ff_h264_cabac_tables[512+4 *2 *64+4 *64+63]
#define bit(string, value)
common internal API header
static const uint8_t *const tables[]