|
145
|
1 /* { dg-skip-if "exceeds eBPF stack limit" { bpf-*-* } } */
|
|
|
2
|
|
111
|
3 typedef signed char int8_t;
|
|
|
4 typedef short int16_t;
|
|
|
5 typedef unsigned char uint8_t;
|
|
|
6 typedef unsigned int uint32_t;
|
|
|
7
|
|
|
8 union unaligned_32 {uint32_t l;} __attribute__((packed)) __attribute__((may_alias));
|
|
|
9 static inline uint32_t NEG_USR32(uint32_t a, int8_t s){return a << (32 - s);}
|
|
|
10 typedef struct GetBitContext { const uint8_t *buffer, *buffer_end; int index;}GetBitContext;
|
|
|
11 typedef struct VLC {int16_t (*table)[2];} VLC;
|
|
|
12 static __attribute__((always_inline)) inline int get_vlc2(GetBitContext *s, int16_t (*table)[2], int bits, int max_depth) {
|
|
|
13 unsigned int re_index= (s)->index;
|
|
|
14 int re_cache= 0;
|
|
|
15 {
|
|
|
16 int n, nb_bits;
|
|
|
17 unsigned int index;
|
|
|
18 index= NEG_USR32(re_cache, bits);
|
|
|
19 n = table[index][1];
|
|
|
20 if(max_depth > 1 && n < 0){
|
|
|
21 re_cache= bswap_32((((const union unaligned_32 *) (((const uint8_t *)(s)->buffer)+(re_index>>3)))->l)) << (re_index&0x07);
|
|
|
22 }
|
|
|
23 }
|
|
|
24 }
|
|
|
25 typedef struct HYuvContext{GetBitContext gb; int decorrelate; int bitstream_bpp; uint8_t *temp[3]; VLC vlc[6];} HYuvContext;
|
|
|
26 static __attribute__((always_inline)) inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){
|
|
|
27 int i;
|
|
|
28 int code = get_vlc2(&s->gb, s->vlc[3].table, 11, 1);
|
|
|
29 if(code != -1){
|
|
|
30 s->temp[0][4*i+0] = get_vlc2(&s->gb, s->vlc[0].table, 11, 3);
|
|
|
31 s->temp[0][4*i+1] = get_vlc2(&s->gb, s->vlc[1].table, 11, 3);
|
|
|
32 s->temp[0][4*i+2] = get_vlc2(&s->gb, s->vlc[2].table, 11, 3);
|
|
|
33 }
|
|
|
34 }
|
|
|
35 void decode_bgr_bitstream(HYuvContext *s, int count){
|
|
|
36 if(s->decorrelate){
|
|
|
37 if(s->bitstream_bpp==24) decode_bgr_1(s, count, 1, 0);
|
|
|
38 else decode_bgr_1(s, count, 1, 1);
|
|
|
39 }
|
|
|
40 }
|
