Subversion Repositories openrisc

typedef signed char int8_t;

typedef short int16_t;

typedef unsigned char uint8_t;

typedef unsigned int uint32_t;

union unaligned_32 {uint32_t l;} __attribute__((packed)) __attribute__((may_alias));

static inline uint32_t NEG_USR32(uint32_t a, int8_t s){return a << (32 - s);}

typedef struct GetBitContext { const uint8_t *buffer, *buffer_end; int index;}GetBitContext;

typedef struct VLC {int16_t (*table)[2];} VLC;

static __attribute__((always_inline)) inline int get_vlc2(GetBitContext *s, int16_t (*table)[2], int bits, int max_depth) {

    unsigned int re_index= (s)->index;

    int re_cache= 0;

    {

        int n, nb_bits;

        unsigned int index;

        index= NEG_USR32(re_cache, bits);

        n = table[index][1];

        if(max_depth > 1 && n < 0){

            re_cache= bswap_32((((const union unaligned_32 *) (((const uint8_t *)(s)->buffer)+(re_index>>3)))->l)) << (re_index&0x07);

        }

    }

}

typedef struct HYuvContext{GetBitContext gb; int decorrelate; int bitstream_bpp; uint8_t *temp[3]; VLC vlc[6];} HYuvContext;

static __attribute__((always_inline)) inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){

    int i;

        int code = get_vlc2(&s->gb, s->vlc[3].table, 11, 1);

        if(code != -1){

            s->temp[0][4*i+0] = get_vlc2(&s->gb, s->vlc[0].table, 11, 3);

            s->temp[0][4*i+1] = get_vlc2(&s->gb, s->vlc[1].table, 11, 3);

            s->temp[0][4*i+2] = get_vlc2(&s->gb, s->vlc[2].table, 11, 3);

        }

}

void decode_bgr_bitstream(HYuvContext *s, int count){

    if(s->decorrelate){

        if(s->bitstream_bpp==24) decode_bgr_1(s, count, 1, 0);

        else             decode_bgr_1(s, count, 1, 1);

    }

}