1 /* { dg-skip-if "exceeds eBPF stack limit" { bpf-*-* } } */
2
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));
NEG_USR32(uint32_t a,int8_t s)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;
get_vlc2(GetBitContext * s,int16_t (* table)[2],int bits,int max_depth)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;
decode_bgr_1(HYuvContext * s,int count,int decorrelate,int alpha)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 }
decode_bgr_bitstream(HYuvContext * s,int count)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 }
41