static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s)

{

    int x, y;

    unsigned char P[4];



    /* 4-color encoding */

    CHECK_STREAM_PTR(4);



    memcpy(P, s->stream_ptr, 4);

    s->stream_ptr += 4;



    if (P[0] <= P[1]) {

        if (P[2] <= P[3]) {



            /* 1 of 4 colors for each pixel, need 16 more bytes */

            CHECK_STREAM_PTR(16);



            for (y = 0; y < 8; y++) {

                /* get the next set of 8 2-bit flags */

                int flags = bytestream_get_le16(&s->stream_ptr);

                for (x = 0; x < 8; x++, flags >>= 2)

                    *s->pixel_ptr++ = P[flags & 0x03];

                s->pixel_ptr += s->line_inc;

            }



        } else {

            uint32_t flags;



            /* 1 of 4 colors for each 2x2 block, need 4 more bytes */

            CHECK_STREAM_PTR(4);



            flags = bytestream_get_le32(&s->stream_ptr);



            for (y = 0; y < 8; y += 2) {

                for (x = 0; x < 8; x += 2, flags >>= 2) {

                    s->pixel_ptr[x                ] =

                    s->pixel_ptr[x + 1            ] =

                    s->pixel_ptr[x +     s->stride] =

                    s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];

                }

                s->pixel_ptr += s->stride * 2;

            }



        }

    } else {

        uint64_t flags;



        /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */

        CHECK_STREAM_PTR(8);



        flags = bytestream_get_le64(&s->stream_ptr);

        if (P[2] <= P[3]) {

            for (y = 0; y < 8; y++) {

                for (x = 0; x < 8; x += 2, flags >>= 2) {

                    s->pixel_ptr[x    ] =

                    s->pixel_ptr[x + 1] = P[flags & 0x03];

                }

                s->pixel_ptr += s->stride;

            }

        } else {

            for (y = 0; y < 8; y += 2) {

                for (x = 0; x < 8; x++, flags >>= 2) {

                    s->pixel_ptr[x            ] =

                    s->pixel_ptr[x + s->stride] = P[flags & 0x03];

                }

                s->pixel_ptr += s->stride * 2;

            }

        }

    }



    /* report success */

    return 0;

}
