static void render_line(int x0, uint8_t y0, int x1, int y1, float *buf) { int dy = y1 - y0; int adx = x1 - x0; int ady = FFABS(dy); int sy = dy < 0 ? -1 : 1; buf[x0] = ff_vorbis_floor1_inverse_db_table[y0]; if (ady*2 <= adx) { // optimized common case render_line_unrolled(x0, y0, x1, sy, ady, adx, buf); } else { int base = dy / adx; int x = x0; uint8_t y = y0; int err = -adx; ady -= FFABS(base) * adx; while (++x < x1) { y += base; err += ady; if (err >= 0) { err -= adx; y += sy; } buf[x] = ff_vorbis_floor1_inverse_db_table[y]; } } }