void vp8_mc(VP8Context *s, int luma, uint8_t *dst, uint8_t *src, const VP56mv *mv, int x_off, int y_off, int block_w, int block_h, int width, int height, int linesize, vp8_mc_func mc_func[3][3]) { if (AV_RN32A(mv)) { static const uint8_t idx[3][8] = { { 0, 1, 2, 1, 2, 1, 2, 1 }, // nr. of left extra pixels, // also function pointer index { 0, 3, 5, 3, 5, 3, 5, 3 }, // nr. of extra pixels required { 0, 2, 3, 2, 3, 2, 3, 2 }, // nr. of right extra pixels }; int mx = (mv->x << luma)&7, mx_idx = idx[0][mx]; int my = (mv->y << luma)&7, my_idx = idx[0][my]; x_off += mv->x >> (3 - luma); y_off += mv->y >> (3 - luma); // edge emulation src += y_off * linesize + x_off; if (x_off < mx_idx || x_off >= width - block_w - idx[2][mx] || y_off < my_idx || y_off >= height - block_h - idx[2][my]) { s->dsp.emulated_edge_mc(s->edge_emu_buffer, src - my_idx * linesize - mx_idx, linesize, block_w + idx[1][mx], block_h + idx[1][my], x_off - mx_idx, y_off - my_idx, width, height); src = s->edge_emu_buffer + mx_idx + linesize * my_idx; } mc_func[my_idx][mx_idx](dst, linesize, src, linesize, block_h, mx, my); } else mc_func[0][0](dst, linesize, src + y_off * linesize + x_off, linesize, block_h, 0, 0); }